US2671142A - Circuit interrupter construction - Google Patents

Circuit interrupter construction Download PDF

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US2671142A
US2671142A US362891A US36289153A US2671142A US 2671142 A US2671142 A US 2671142A US 362891 A US362891 A US 362891A US 36289153 A US36289153 A US 36289153A US 2671142 A US2671142 A US 2671142A
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contact
conducting
movable
sleeve
circuit interrupter
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US362891A
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Sigurd I Lindell
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S&C Electric Co
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S&C Electric Co
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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H31/00—Air-break switches for high tension without arc-extinguishing or arc-preventing means
    • H01H31/006—Air-break switches for high tension without arc-extinguishing or arc-preventing means adapted to be operated by a hot stick; Hot sticks therefor

Definitions

  • This invention relates, generally, to electric circuit interruptersand it has particular relation to circuit interrupters for disconnecting under aload a conventional circuit isolating or switching device, such as a disconnecting fuse, a disconnecting switch or the like, without drawing'anarcbetweenthe energized parts thereof whichare separated or disconnected as an incident to the-circuit isolating operation as usually attempted ,tobe effected by a lineman by means of a-switchstick,
  • a conventional circuit isolating or switching device such as a disconnecting fuse, a disconnecting switch or the like
  • Figure 1 is a view in side elevation of a conventional form of dropout fuse construction such as that described in States Patent No. 2,247,700, issued July 1, 1941,
  • Figure 2 is a top plan View of the circuit isolating device-or dropout fuse shown in Figure 1;
  • Figure 3- is a view, in side elevation, of the dropout fuse construction in Figure 1, at a reduced scale, and illustrating the application of the auxiliary circuit interrupter of the present invention thereto for effecting ing between the parts thereof last to separate;
  • Figuregiand 5 are Views, similar to Figure 3,
  • Figure 6 is a view at an enlarged scale, certain parts being broken away, illustrating the general construction and arrangement of the auxiliary circuitinterrupter, the view being taken lookingfrom right to left with respect to the auxiliary circuit interrupter as illustrated in Figures 3, 4,
  • Figure 7 is a longitudinal sectional View of the the separable conmore detail in Ramsey Unitedthe opening of the fuse or disconnecting device without causing arc 3 but illustrating the relative positions of the parts of the auxiliary circuit interrupter when its separable contacts are in the full open position;
  • Figure 10 is a view, in side elevation, of a modified form of contact arm for gripping the pull ring of the fuse, disconnecting switch or the like.
  • the reference character I designates, generally, a circuit isolating device or switching device which, in this instance, is a dropout fuse construction such as described in more detail in Ramsey Patent No. 2,247,700, issued July 1, 1941, and referred to above.
  • the present invention can be used in conjunction with other circuit isolating devices, such as disconnecting switches in which a switch blade is swung from the closed to the open position for the purpose of introducing an air gap into the circuit.
  • the particular dropout fuse construction I0 includes an insulator II which carries terminal assemblies I2 and I3 at its ends for connection to line conductors as will be understood readily. Pivotally mounted at I4 on the lower terminal assembly I3 is a fuse tube that is indicated, generally, at I5.
  • the fuse tube I5 contains a fusible element which is arranged to be ruptured on flow therethrough of excess current and mechanism is provided for automatically unlatching the fuse tube I5 from the upper terminal assembly I2 so that it can fall to the open circuit position. When this occurs, the circuit is interrupted within the fuse tube I5 and the arc incident thereto is extinguished. Ordinarily under fault conditions, the circuit will be interrupted within the fuse tube I5 before it swings out of contact with the upper line terminal assembly I2.
  • the present invention has to do particularly with the provision of mechanism for effecting the opening of the circuit under load by bodily moving the fuse tube IE to the open circuit position while it still contains a fuse link that has not been ruptured by overcurrent. Provision is made for accomplishing this while load current is flowing through the fuse tube I5 in such manner that no arc is drawn between it and the upper terminal assembly I2 during the circuit opening operation.
  • the fuse tube I5 has a fuse tube terminal assembly indicated, generally, at I6.
  • This assembly includes a sleeve I! that is slidable upwardly relative to the fuse tube iii and formed integrally with the sleeve I! is a hook is which is held in latching engagement with a roller I9 carried by the upper terminal assembly I2.
  • the sleeve IT is moved upwardly to such position that the hook I8 no longer engages the roller I9. This same operation can be accomplished by means of an operating arm 20 which is pivoted at 2i on the fuse tube terminal assembly I6.
  • the operating arm 20 has a pull ring 22 which is arranged to be engaged bythe prong of a switch stick or the contact arm of the auxiliary circuit interrupter to be described hereinafter.
  • the pull ring 22 is swung in a counterclockwise direction about the pivot 2I, the sleeve I1 is moved upwardly so that the hook I8 clears the roller I9.
  • the fuse tube I5 then can be swung or allowed to fall to the open circuit position.
  • the fuse tube I5 When the fuse tube I5 is operated in the manner just described by the prong of a switch stick 4 engaging the pull ring 22, an arc will be drawn between the portions of the terminal assembly I2 and fuse tube terminal assembly I6 last to separate. As indicated above, such an arc may damage severely these terminal assemblies or it may cause a fault on the circuit.
  • the fuse tube I5 can be unlatched from the upper terminal assembly I2 and swung to the open position without drawing an are between the terminal assemblies I2 and lb.
  • the manner in which this is accomplished is by providing a shunt circuit between the terminal assemblies I2 and I6, unlatching the fuse tube terminal assembly I6 from the upper terminal assembly I2, swinging the fuse tube I5 to such a position that an air gap is provided between the terminal assemblies I2 and I6 and then interrupting the circuit by separating contacts within the auxiliary circuit interrupter under such conditions that the arc is confined and extinguished quickly.
  • the only modification required in the construction of the circuit breaker It for accommodating the auxiliary circuit interrupter comprises providing the sleet hood 23, forming a part of the terminal assembly I2, with a transversely extending conducting arm 24. As will appear hereinafter, this provides a fixed support for the auxiliary circuit interrupter while it is being employed for swinging the fuse tube IE to open position without arcing between the terminal assemblies I2 and I6.
  • a generally tubular auxiliary circuit interrupter shown generally at 25, is provided. Its application to the dropout fuse in is illustrated in Figure 3 and the details of construction are shown more clearly in Figure '7 to which reference now will be had.
  • the auxiliary circuit interrupter has a relatively fixed conducting member 26 at its upper end to which a metallic cap 21 is secured by cap screws 28.
  • a conducting eye member 29 is pivoted or swiveled at 30 on the metallic cap 21, and it comprises a pair of resilient contact extensions (H which are bowed outwardly as indicated at 32 for facilitating entry of the transversely extending conducting arm 24 carried by the sleet hood 23.
  • the upper portions 33 of the extensions 3I are positioned in side by side relationship and biased toward each other by the inherent resiliency of the contact extensions 31. Because of this construction, they grip the conducting arm 24 tightly therebetween.
  • the upper ends 34 of the contact extensions 3i are turned outwardly, as shown, and interfit with a keeper 35 which not only limits the movement apart of the upper portions 33 but also serves as a stop to prevent relative movement between the eye member 29 and the conducting arm 24 when a downward pull is applied to the auxiliary circuit interrupter 25 in a manner to be described.
  • an insulating sleeve 38 Depending from the relatively fixed conducting member 26 is an insulating sleeve 38. It may be formed of a suitable phenolic condensation product. Intermediate the ends of the insulating sleeve 38 is a ringlike contact as that is electrically and mechanically connected by a conducting sleeve it to the conducting member 25 at the upper end of the insulating sleeve 3%. It will be observed that both the insulating sleeve 38 and the conducting sleeve iii! are threaded into the underside of the conducting member 26. Cooperao'ruma:
  • the trailer-.44 is also. formedof .a material which.
  • a garter spring 54 urgesltheir lower contact engagement with the underside of. the shoulder 52':
  • an indicator 55 is employed. Asshown in Figure '7, it. constitutes.- an extension of the lower end oftherodlike contact 4
  • a metallic sleeve 59 Surrounding and telescoped with the insulating sleeve 38 and freely axially rotatable with re-- spect thereto is a metallic sleeve 59. At its upper end the metallic sleeve 59 hasan end? ring 601 against the underside of'which a coillcompression spring 61' reacts; It will; be; observed; that is secured. by: a
  • the. contacts 39 and 4! are provided with an annular slot 66 and the former: carries a detent 6? spring biased by a resilient arm 68 that is secured by a rivet 69 to the outer surface of the sleeve 59 near its upper end.
  • the inner end of the detent filrides over the surface of the insulating sleeve 38* until it: reaches the annular slot (-26.
  • the detent 68- has moved through an opening 7.0 in the end ring 6i?
  • FIG. 6 Formed integrally therewith, Figure 6, is an'arm 14 which is'arranged to receive a detachable fitting-15 mounted on the upper end of a live line w stick 16-.
  • the liveline stick 6 is a suitably seasoned and treated wood pole which hashigh insulating qualities and is arranged to bemanipulated by a lineman on the ground; for operating various live line tools which are employed. for performing operations on a circuit while the'conductors are energized at high voltage.
  • the fittingl'd' is clamped to the arm 14 by a-bolt- 17 and a cooperating wing nut 78.
  • a contact. arm shown generally at 79, which is rockably mounted on the arm 74.
  • a shaft 89 is, employed and it has formed integrally therewith a shoulder 84, Figure 7, which cooperates with a stop pin 82.
  • the shoulder 81 and stop pin 82' limit the movement of the contact arm 19 in a clockwise direction but permit it' to-swing in a counterclockwise direction to the position shown by the broken lines in Figure 7:.
  • a torsion spring 83 having one end 1 84. fastenedtothe arm 14-: and the-other end-8.5:
  • and stop pin 82 may be omitted and the spring 83 can be arranged to function as a centering spring biasing the contact arm 19 to the position shown by the full lines in Figure 'I and permitting it to swing therefrom in either direction as may be required in the manipulation of the auxiliary circuit interrupter 25.
  • the contact arm i9 includes a shank 99 which is fixed on and carried by a head 9! which forms an integral part of the shaft 89.
  • the shank 90 has a contact finger 92 extending at right angles with a bulbous outer end 93 to facilitate entry into the opening in the pull ring 22.
  • a cooperating contact finger 9% is employed. It extends parallel to the contact finger 92 and has an inclined outer end 95 to facilitate cooperation with the pull ring 22.
  • the contact finger 94 extends at right angles from and is carried by a sleeve 96 which is telescoped over the shank 99 and which is biased upwardly by a coil compression spring 91. Movement of the sleeve 95 with respect to the shank 99 is limited by a slot 98 in the sleeve 95 and a stop pin 29 extending therethrough from the shank 99.
  • the spring 33 transmits its force through the contact finger 92 to bear against the inside of the pull ring 22.
  • this contact engagement is sufiicient, particularly where the spring 33 functions as a centering spring as described above, sufficient contact pressure is maintained against the pull ring 22 so that, if desired, the cooperating contact finger 94 and parts associated therewith can be omitted. In such case reliance is placed on the biasing action of the spring 83 for maintaining the desired contact engagement.
  • the contact arm is constructed so that the contact fingers thereoi bear radially outwardly against the opening of the pull ring 22.
  • a sleeve 93 which is carried by the head 9
  • a contact finger EM Projecting at right angles from the sleeve E93 is a contact finger EM whose outer end H95 is inclined upwardly to facilitate entry into the pull ring 22.
  • Slidably mounted within the sleeve m3 is a shank 285 having a transverse pin it! extending therefrom through a slot I98 in the sleeve [93 to limit relative movement between the 96 and the sleeve 33.
  • the shank W6 carries a contact finger 599 at its upper end which extends parallel to the contact finger 94 and has an inclined outer end H9 to facilitate entry into the opening of the pull ring 22.
  • the contact finger [99 also has a shoulder Hi which cooperates with the pull ring 22 to maintain mechanical and electrical engagement therewith.
  • a coil compression spring H2 reacts between the upper end of the sleeve [95 and a washer H3 secured to the upper end of the shank I96 for biasing the contact finger W9 upwardly so as to maintain good mechanical and electrical contact engagement with the inner surface of the pull ring 22 at diametrically opposite locations.
  • the auxiliary circuit interrupter carried by the live line stick 76 as illustrated in shank Figure 3, is manipulated so that the eye member 29 engages the conducting arm 24 on the sleet hood 23 and the contact arm 19 engages the pull ring 22.
  • This is facilitated by the swivel mounting of the eye member 29 and the fact that the metallic sleeve 59, to which the live line stick 16 is attached by the support bracket 13, is rotatable with respect to the longitudinal axis of the auxiliary circuit interrupter, more particularly the longitudinal axis of the insulating sleeve 38.
  • either form of contact arm 19 or Hi2 can be employed.
  • the live line stick it is manipulated by pulling on it lengthwise to the position shown in Figure 4. Since the support bracket 13 is fastened to the metallic sleeve 59 and since the eye member 29 prevents movement of the insulating sleeve 38, the metallic sleeve 59 is moved away from the insulating sleeve 38, as shown in Figure 4, and compression of the coil spring 62 is begun. However, the resilient fingers 53 are strong enough to hold the rodlike contact 4! against the force initially exerted by the spring 65 and thus, while the metallic sleeve 59 is being moved downwardly to the position shown in Figure 4, the contacts 39 and M remain in engagement completing the shunt circuit previously described.
  • the continued'manipulation of the live line stick 1'6 causes the fuse tube 15 to swing further away from the closed position. This is accompanied by a further compression of the spring 6!.
  • the metallic tube 59 is operated to the position shown in Figure 8 where the detent El enters the groove 96 and prevents further movement apart Or reverse movement. After this occurs and the spring 6
  • the coil compression spring may be compressed to the solid position where the downward pull on the live line stick it is transmitted directly to the flanged metallic fitting 56.
  • the lineman now manipulates the auxiliary in such manner as to dismember '26. This is facilitated by the fact that the metallic sleeve 59 is rotatable about the longitudinal axis of the device. Thereafter'he furthermanipulates the auxiliary circuit interrupter 25 to disengage the contact arm 19 from the pull ring 12. This allows the fuse tube l5 to swing to the full open position under the'infiuence of gravity.
  • auxiliary circuit interrupter'25 is restored to the'closed position, shown in' Figure 7, by withdrawing the detent 61 from the slot '66 "and allowing the metallic sleeve59 to'be moved by the spring 6] back over themsulating sleeve 38, thereby'operating therodlike contact 4
  • this is accomplished only when the "device is removed entirely from proximity'to an energized part of the electric power system.
  • Mechanism for opening a high voltage circuit isolating device such as a disconnecting fuse, disconnecting switch or the like, normally carrying line current comprising, in combination, an auxiliary circuit interrupter having a relatively fixedconducting member for attachment'to 2.
  • the contact arm includes a pair of contact fingers biased apart for gripping the interior of a ringlike portionof the inovableenergized conducting part.
  • Mechanism for opening a high voltage circuit insulating device such-as a disconnecting fuse, disconnecting switch or the like, normally carrying line current
  • an auxiliary circuit interrupter having'a relatively fixed conducting member for attach energized conducting part of said circuit isolating device *and'a relatively movable conducting member adapted to beta!- ried by a live line stick, means'rotatablvmounting said conducting members relative toeach other, a contact arm on said movable member for attachment to a movable energized conducting part of said circuit isolating device, relatively fixed and movable contacts in-said circuit interrupter connected respectivelyto said fixed and movable conducting-members, movement of said movable conducting'memberaway from 'said fixed conducting member efiecting separation of said movable energized conducting part while maintaining a-shunt circuit therebetween through ll separation of said separable contacts to open the circuit, the first mentioned means thereafter being detachable from said parts whereupon the same are permitted to operate to full open
  • Mechanism for opening a high voltage circuit isolating device such as a disconnecting fuse, disconnecting switch or the like, normally carrying line current
  • an auxiliary circuit interrupter having a relatively fixed conduct ng member for attachment to a stationary energized conducting part of said circuit isolating device and a relatively'movaole conducting member adapted to be carried by a live line stick, a contact arm on said movable member for attachment to a movable energized conducting part of said circuit isolating device, relatively fixed and movable contacts in said circuit interrupter connected respectively to said fixed and movable conducting members, movement of said movable conducting member away from said fixed conducting member effecting separation of said movable energized conducting port from said stationary energized conducting part while maintaining a shunt circuit therebetween through said contacts, operating means for effecting separation of said contacts when said movable conducting member reaches a predetermined position away from said fixed conducting member, and indicator means cooperating with said movable contact for indicating by its position relative to said auxiliary circuit
  • Mechanism for opening a current carrying high voltage circuit isolating device such as a disconnecting fuse, disconnecting switch or the like having a transversely extending conducting arm on a stationary energized conducting part and a pull ring on a movable energizing conducting part that is arranged to swing bodily through an arc from closed to open position, comprising, in combination; a tubular auxiliary circuit interrupter having a relatively fixed conducting member at one end, an insulating sleeve extending therefrom, a metallic sleeve telescoped over and movable endwise away from said insulating sleeve, a relatively fixed contact within said insulating sleeve connected to said fixed conducting member, a rodlike contact engaging said relatively fixed contact and movable endwise away therefrom through said insulating sleeve, conducting means interconnecting said rodlike contact and said metallic sleeve during movement thereof relative to said insulating sleeve, and a coil compression spring surrounding said insulating s
  • Mechanism for opening acurrent carrying high voltage circuit isolating device such as a disconnecting fuse, disconnecting switch or the like having a transversely extending conducting arm on a stationary energized conducting part and a pull ring on a movable energized conducting part that is arranged to swing bodily through an are from closed to open position, comprisin in combination; a tubular axiliary circuit interrupter having a relatively fixed conducting member at one end, an insulating sleeve extending therefrom, a metallic sleeve telescoped over and movable endwise away from said insulating sleeve, a relatively fixed contact within said insulating sleeve connected to and spaced from said fixed conducting member, a liner within said insulating sleeve capable of evolving an arc extinguishing medium when subjected to the heat of an arc, a rodlike contact engaging said relatively fixed contact and movable endwise away therefrom through said liner and having spaced shoulders thereon, resilient means carried by said
  • Mechanism for opening a current carrying high voltage circuit isolating device such as a disconnecting fuse, disconnecting switch or the like having a transversely extendin conducting arm on a stationary energized conducting part and a pull ring on a movable energized conducting part that is arranged to swing bodily through an arc from closed to open position, comprising, in combination; a tubular auxiliary circuit interrupter having a relatively fixed conducting member at one end, an insulating sleeve extending therefrom, a metallic sleeve telescoped over and movable endwise away from said insulating sleeve, a relatively fixed ringlike contact within said insulating sleeve connected to and spaced from said fixed conducting member, a liner within said insulating sleeve capable of evolving an arc extinguishing medium when subjected to the heat of an arc, a rodlike contact engaging said relatively fixed ringlike contact and movable endwise away therefrom through said liner and having spaced shoulders there
  • Mechanism for opening a current carrying high voltage circuit isolating devices uch as a disconnecting fuse, disconnecting switch or the like having a transversely-extending conducting arm on a stationary energized conductin part that is arranged to swing bodily through an'arc from closed to open position
  • a tubular auxiliary circuit interrupter having a relatively fixed conducting member at one end, an insulating sleeve extending therefrom, a metallic sleeve telescoped over and movable endwi'se awayfrom said insulating sleeve, a ringlike contact within said insulating sleeve connected to and spaced from said fixed conducting member, a liner within said insulat'ng sleeve capable of evolving an arc extinguishingmedium when subjected to the heat of an are, a rodlike contact engaging said ringlilte contactzand movable endwise away therefrom through said liner and having spaced shoulders thereon, an insulating trailermovable with said rodlike contact
  • a current carrying high voltage circuit isolating device such as a disconnecting fuse, disconnecting switch orlthe like having a transversely extending conducting arm on a stationary energized conducting part and a pull ring on amovable energizedconducting part that is arranged to swingbodilythrough an are from closed to open position, comprising, in combination; a tubular auxiliary circuit interrupter having a relatively fixed conducting member at one end, an insulating sleeve extending therefrom, a metallic sleeve telescoped over and movable end-wise away from said insulating sleeve, a relatively fixed contact Within said insulating sleeve connected to and spaced from said fixed conducting member, a rod-like contact engaging said relatively fixedcontact and movable endwise away therefrom through said insulating sleeve and having spaced shoulders thereon, indicator means cooperating with said rod like contactand showing when said contacts are engaged :and when fully disengaged, resilient fingers carried
  • Mechanism for opening a current carrying high voltage circuit isolating device such as a disconnecting fuse, disconnecting switch or the like having a transversely extending conducting arm on a stationary energized conducting part and a pull ring on a movable energized conducting part that is arranged to swing bodily through an are from closed to open position, comprising, in combination; a tubular auxiliary circuit interrupter having a relatively fixed conducting member at one end, an insulating sleeve extending therefrom, a metallic sleeve telescoped over and movable endwise away from said insulating sleeve, a ringlike contact within said insulating sleeve connected to and spaced from said fixed conducting member, a liner within said insulating sleeve capable of evolving an arc extinguishing medium when subjected to the heat of an are, a rodlike contact engaging said ringlike contact and movable endwise away therefrom through said liner and having spaced shoulders thereon, an insulating trailer
  • Mechanism for opening a high voltage circuit by manipulation of a live line stick comprising, in combination, a circuit interrupter having a relative fixed conducting member for connection to an energized part of said circuit and a relatively movable conducting member adapted to be carried by said live line stick and to be connected to a circuit to be disconnected from said energized part, and relatively fixed and movable contacts in said circuit interrupter connected respectively to said fixed and movable conducting members, movement of said movable conducting member by said live line stick away from said fixed conducting member effecting separation of said contacts and thereby disconnection of said circuits.
  • Mechanism for opening a high voltage circuit by manipulation of a live line stick comprising, in combination, a circuit interrupter having a relatively fixed conducting member for connection to an energized part of said circuit and a relatively movable conducting member adapted to be carried by said live line stick and to be connected to a circuit to be disconnected from said energized part, relatively fixed and movable contacts in said circuit interrupter connected respectively to said fixed and movable conducting members, and operating means cooperating with said movable conducting member when the same is moved by said live line stick away from said fixed conducting member and said contacts for separating them with a snap action when said movable conducting member reaches a predetermined position away from said fixed conducting member whereby said circuits are disconnected.
  • Mechanism for opening a high voltage circuit by manipulation of a live line stick comprising, in combination, a circuit interrupter having a relatively fixed conducting member; for
  • Mechanism for opening a high voltage circuit isolating device such as a disconnecting fuse, disconnecting switch or the like, normally carrying current and having a stationary normally energized terminal contact member and a current carrying member movable into and out of engagement therewith by manipulation of a live line stick
  • said mechanism comprising, in combi" nation, an auxiiiary circuit interrupter having contact means for connection to said terminal contact member and additional contact means for connection to said movable current carrying member, said auxiliary circuit interrupter when closed providing a shunt circuit between said terminal contact member and said movable current carrying member, said auxiliary circuit interrupter being adapted to be carried by said live line stick and to be manipulated by an operator to disengage said movable current carrying member from said terminal contact member while said shunt circuit is maintained, and means for operating said auxiliary circuit interrupts to open said shunt circuit after said movable current carrying member disengages said terminal contact member.
  • Mechanism for opening a high voltage circuit isolating device such as a disconnecting fuse, disconnecting switch or the like, normally carryin, current and having a stationary normally energized terminal contact member and a current carrying member movable in a plane into and cut of engagement therewith by manipulation or" a live line stick
  • said mechanism comprising, in combination, an auxiliary circuit interrupter having contact means for connection to said terminal contact member and additional contact means for connection to said movable current carrying member, said auxiliary circuit interrupter when closed providing a shunt circuit between said terminal contact member and said movable current carrying member, said auxiliary circuit interrupter being adapted to be carried by said live line stick and to be manipulated by an operator to disengage said movable current carrying member from said terminal contact member while said shunt circuit is maintained, the connections between said auxiliary circuit interrupter and said terminal contact member and between said auxiliary circuit interrupter and said movable current carrying member being suificiently flexible to allow the manipulation of said live line stick with a substantial range of movement in planes other than said plane of movement
  • Mechanism for opening a high voltage circuit isolating device such as a disconnecting fuse, disconnecting switch or the like, normally carrying current and having a stationary normally energized terminal contact member and a current carrying member movable in a plane into and out of engagement therewith by manipulation of a live line stick
  • said mechanism comprising, in combination, an auxiliary circuit interrupter having contact means for connection to said terminal contact member and additional contact means for connection to said movable current carrying member, said auxiliary circuit interrupter when closed providing a shunt circuit between said terminal contact member and said movable current carrying member, said auxiliary circuit interrupter being adapted to be carried by said live line stick and to be manipulated by an operator to disengage said movable current carrying member from said terminal contact member while said shunt circuit is maintained, the connections between said auxiliary circuit interrupter and said terminal contact member and between said auxiliary circuit interrupter and said movable current carrying member being sufficiently flexible so that it is unnecessary to exert a pull on said live line stick in said plane of movement of said movable current carrying member or in
  • Mechanism for opening a high voltage circuit isolating device such as a disconnecting fuse, disconnecting switch or the like, normally carrying current and having a stationary normally energized terminal contact member and a current carrying member movable into and out of engagement therewith by manipulation of a live line stick
  • said mechanism comprising, in combination, an auxiliary circuit interrupter having contact means for connection to said terminal contact member and additional contact means for connection to said movable current carrying member, said auxiliary circuit interrupter when closed providing a shunt circuit between said terminal contact member and said movable current carrying member, said additional contact means including a flexibly mounted conducting member having a portion engaging said movable current carrying member and movable therewith as it moves away from engagement with said terminal contact member, said auxiliary circuit interrupter being adapted to be carried by said live line stick and to be manipulated by an operator to disengage said movable current carrying member from said terminal contact member while said shunt circuit is maintained, and means for operating said auxiliary circuit interrupter to open said shunt circuit after said movable current carrying member
  • Mechanism for opening a high voltage circuit isolating device such as a disconnecting fuse, disconnecting switch or the like, normaliy carrying current and having a stationary normally energized terminal contact member and a current carrying member movable in a plane into and out of engagement therewith by manipulation of a live line stick
  • said mechanism comprising, in combination, an auxiliary circuit interrupter hav- L19 ing contact means for connection to said terminal contact mem er and additional contact :imeans 'for connection tosaid movable current 'carrying member, said auxiliary circuit interiruptertwhen closed providing a shunt circuit be- :tween said terminal contact member and said movable current carrying member, said auxiliary circuit interrupter being'adapted to be carried "by said live line stick andto be manipulated by :an operator to disengage said movable current carrying member from said terminal contact lmember whilesaid shunt circuit is maintained, the connections between said auxiliary circuit in iterrupter andsaid terminal contact member and ibetwe'en said said
  • auxiliary circuit interrupter whenclosed providing a shunt circuit between said terminal contact member and said movable current carrying member saidauxiliary circuit interrupter being adapted to be carried by said live line stick and to be manipulated by an operator to disengage said movable current carrying member from said terminal contact member while said shunt circuitis maintained, the connections between said.

Description

March 2, 1954 s. 1. LINDELL 2,671,142 CIRCUIT INTERRUPTER CONSTRUCTION Original Filed Oct. 31, 1951 4 Sheets-Sheet 1 IN V EN TOR.
March 2, 1954 Original Filed Oct. 31, 4 Sheets-Sheet 2 INVENTOR.
Jgardflafidell, BY
s. l. LINDELL 2,671,142 CIRCUIT INTERRUPTER CONSTRUCTION March 2, 1954 s. I. LINDELL 2,671,142
CIRCUIT INTERRUPTER CONSTRUCTION Original Filed Oct. 31, 1951 4 Sheets-Sheet 3 Z.9 jj
IN V EN TOR.
March 2, 1954 s. 1. LINDELL CIRCUIT INTERRUPTER CONSTRUCTION 4 Sheets-Sheet 4 Original Filed Oct. 31, 1951 w l v w mw wmm
E hThT) w a w/ vw awm d5 ZIIIZIIIIZIMZ Patented Mar. 2, 1954 2,671,142 CIRCUIT IN TERRUPTER CONSTRUCTION Sigurd I. Lindell,
Chicago, IlL, assignor to S & C
Electric Company, Chicago, III., a corporation of Delaware Continuation of application Serial No. 254,036,
October 31, 1951.
1953, Serial No. 362,891
25 Claims. (Cl. 200-146) This invention relates, generally, to electric circuit interruptersand it has particular relation to circuit interrupters for disconnecting under aload a conventional circuit isolating or switching device, such as a disconnecting fuse, a disconnecting switch or the like, without drawing'anarcbetweenthe energized parts thereof whichare separated or disconnected as an incident to the-circuit isolating operation as usually attempted ,tobe effected by a lineman by means of a-switchstick, This application is a continuation of application Serial No. 254,036, filed OctobenSl, 1951, and now abandoned.
It is-sometimes necessary-to deenergize a high voltage electric powercircuit carrying load currentby swinging-a pivotally mounted fuse to open circuit position withoutrupturing its fusible element. Or itmay be necessary to accomplish this by; opening the blade of a conventional disconnecting switch under these conditions, the switch blade having no particular means for interrupting the arc incident toits being opened. When these operationsare performed, an arc is drawn between the energized parts last in engagement since, under the assumed conditions, load current or line current is flowing. The are is likely to causesevereburning of these parts or it may jumpstoground or to an adjacent circuit and createa fault causing damage. At any event it is likely that operation of one or more circuit interruptersicloser tothe power source will be required inorder to clear the fault thus caused. Accordingly, among the objects of this invention area To provide for simply, efficiently and economically opening'an energized current carrying highvoltage electric power circuit by swingingafuse-or disconnecting switch blade toopen position without, rupturing the fusible element of the-,former'and, without causingthe are between the energized parts of the fuse or the switch lasttoseparate; to shunt the separable parts of the fuse or; switch by an auxiliary circuit interrupter that isarrangedto draw and extinguish the are within itself afterthe parts of the fuse or disconnecting switch-or other circuit breaking device have been separated, to extinguish the are quickly and positively within the auxiliary circuit interrupter withoutexternal arcing; to construct the auxiliary circuitinterrupter so it can be connected conveniently and quickly to the fuse or disconnecting switch and operated first to swing the fuse-or switch towardopen circuit pesiti n while shunting; the separable energized parts thereof and connectingthe contact-sol" the auxil iary circuit interrupter in series therewith and thereafter opening the. circuit by drawing and his application June 19,
extinguishing an are within the auxiliary Cl1-" This invention is disclosed in the embodiment accompanying drawings,-
thereof shown in the and it comprises the features of construction, combination of elements and arrangement of parts which will be exemplifiedin the construction hereinafter set forth and the scope of the application of which will be indicated in the appended claims.
For a more complete understanding of the nature and scope of this invention, reference may be had to the following detailed description'taken together with the accompanying drawings, in which:
Figure 1 is a view in side elevation of a conventional form of dropout fuse construction such as that described in States Patent No. 2,247,700, issued July 1, 1941,
certain partsof the terminal assembly at the upper endbeing broken away in order to illustrate the details of construction;
Figure 2 is a top plan View of the circuit isolating device-or dropout fuse shown in Figure 1;
Figure 3- is a view, in side elevation, of the dropout fuse construction in Figure 1, at a reduced scale, and illustrating the application of the auxiliary circuit interrupter of the present invention thereto for effecting ing between the parts thereof last to separate;
Figuregiand 5 are Views, similar to Figure 3,
showing successive stages in the opening of the fuse or disconnecting device by means of the auxiliary circuit interrupter;
Figure 6 is a view at an enlarged scale, certain parts being broken away, illustrating the general construction and arrangement of the auxiliary circuitinterrupter, the view being taken lookingfrom right to left with respect to the auxiliary circuit interrupter as illustrated in Figures 3, 4,
and 5;
Figure 7 is a longitudinal sectional View of the the separable conmore detail in Ramsey Unitedthe opening of the fuse or disconnecting device without causing arc 3 but illustrating the relative positions of the parts of the auxiliary circuit interrupter when its separable contacts are in the full open position; and
Figure 10 is a view, in side elevation, of a modified form of contact arm for gripping the pull ring of the fuse, disconnecting switch or the like.
Referring now particularly to Figure l of the drawings, it will be observed that the reference character I designates, generally, a circuit isolating device or switching device which, in this instance, is a dropout fuse construction such as described in more detail in Ramsey Patent No. 2,247,700, issued July 1, 1941, and referred to above. However, it will be understood that the present invention can be used in conjunction with other circuit isolating devices, such as disconnecting switches in which a switch blade is swung from the closed to the open position for the purpose of introducing an air gap into the circuit.
The particular dropout fuse construction I0 includes an insulator II which carries terminal assemblies I2 and I3 at its ends for connection to line conductors as will be understood readily. Pivotally mounted at I4 on the lower terminal assembly I3 is a fuse tube that is indicated, generally, at I5. The fuse tube I5 contains a fusible element which is arranged to be ruptured on flow therethrough of excess current and mechanism is provided for automatically unlatching the fuse tube I5 from the upper terminal assembly I2 so that it can fall to the open circuit position. When this occurs, the circuit is interrupted within the fuse tube I5 and the arc incident thereto is extinguished. Ordinarily under fault conditions, the circuit will be interrupted within the fuse tube I5 before it swings out of contact with the upper line terminal assembly I2.
The present invention has to do particularly with the provision of mechanism for effecting the opening of the circuit under load by bodily moving the fuse tube IE to the open circuit position while it still contains a fuse link that has not been ruptured by overcurrent. Provision is made for accomplishing this while load current is flowing through the fuse tube I5 in such manner that no arc is drawn between it and the upper terminal assembly I2 during the circuit opening operation.
At its upper end the fuse tube I5 has a fuse tube terminal assembly indicated, generally, at I6. This assembly includes a sleeve I! that is slidable upwardly relative to the fuse tube iii and formed integrally with the sleeve I! is a hook is which is held in latching engagement with a roller I9 carried by the upper terminal assembly I2. When the fuse link within the fuse tube 55 is ruptured, the sleeve IT is moved upwardly to such position that the hook I8 no longer engages the roller I9. This same operation can be accomplished by means of an operating arm 20 which is pivoted at 2i on the fuse tube terminal assembly I6. At its outer end the operating arm 20 has a pull ring 22 which is arranged to be engaged bythe prong of a switch stick or the contact arm of the auxiliary circuit interrupter to be described hereinafter. When the pull ring 22 is swung in a counterclockwise direction about the pivot 2I, the sleeve I1 is moved upwardly so that the hook I8 clears the roller I9. The fuse tube I5 then can be swung or allowed to fall to the open circuit position.
When the fuse tube I5 is operated in the manner just described by the prong of a switch stick 4 engaging the pull ring 22, an arc will be drawn between the portions of the terminal assembly I2 and fuse tube terminal assembly I6 last to separate. As indicated above, such an arc may damage severely these terminal assemblies or it may cause a fault on the circuit. In accordance with the present invention, the fuse tube I5 can be unlatched from the upper terminal assembly I2 and swung to the open position without drawing an are between the terminal assemblies I2 and lb. The manner in which this is accomplished, generally, is by providing a shunt circuit between the terminal assemblies I2 and I6, unlatching the fuse tube terminal assembly I6 from the upper terminal assembly I2, swinging the fuse tube I5 to such a position that an air gap is provided between the terminal assemblies I2 and I6 and then interrupting the circuit by separating contacts within the auxiliary circuit interrupter under such conditions that the arc is confined and extinguished quickly. The only modification required in the construction of the circuit breaker It for accommodating the auxiliary circuit interrupter comprises providing the sleet hood 23, forming a part of the terminal assembly I2, with a transversely extending conducting arm 24. As will appear hereinafter, this provides a fixed support for the auxiliary circuit interrupter while it is being employed for swinging the fuse tube IE to open position without arcing between the terminal assemblies I2 and I6.
For the purpose of operating the dropout fuse IE to the open position without arcing, a generally tubular auxiliary circuit interrupter, shown generally at 25, is provided. Its application to the dropout fuse in is illustrated in Figure 3 and the details of construction are shown more clearly in Figure '7 to which reference now will be had.
It will be noted that the auxiliary circuit interrupter has a relatively fixed conducting member 26 at its upper end to which a metallic cap 21 is secured by cap screws 28. A conducting eye member 29 is pivoted or swiveled at 30 on the metallic cap 21, and it comprises a pair of resilient contact extensions (H which are bowed outwardly as indicated at 32 for facilitating entry of the transversely extending conducting arm 24 carried by the sleet hood 23. 'In order to provide good contact engagement with the conducting arm 24, the upper portions 33 of the extensions 3I are positioned in side by side relationship and biased toward each other by the inherent resiliency of the contact extensions 31. Because of this construction, they grip the conducting arm 24 tightly therebetween. The upper ends 34 of the contact extensions 3i are turned outwardly, as shown, and interfit with a keeper 35 which not only limits the movement apart of the upper portions 33 but also serves as a stop to prevent relative movement between the eye member 29 and the conducting arm 24 when a downward pull is applied to the auxiliary circuit interrupter 25 in a manner to be described.
Depending from the relatively fixed conducting member 26 is an insulating sleeve 38. It may be formed of a suitable phenolic condensation product. Intermediate the ends of the insulating sleeve 38 is a ringlike contact as that is electrically and mechanically connected by a conducting sleeve it to the conducting member 25 at the upper end of the insulating sleeve 3%. It will be observed that both the insulating sleeve 38 and the conducting sleeve iii! are threaded into the underside of the conducting member 26. Cooperao'ruma:
ating withthe. ringliket contact: 39.:isa rodlike. contact. 4! having: a bifurcatedtresilient {contact portion 42: at its. upper. end for. engaging-the. ringie likecontacttfi; Belowthe ringlike contact 38 is a.liner 43 of insulating material-.which is capable. of :evolving an 1 are extinguishing medium. when subjected to. the heat of. the; 'arc. may be formed of astackotfibre rings: or; other suitablesmaterialfor this purpose: With-a view to. restricting: the area within whichxthexarc: can play: between the contacts 3.9: and v 4 l. when they are-separated, aninsulating. trailer 44 is:.connectedrto...th'e. rodlike contact-4.1. and arranged tolbe. moiredconjointly therewith into thebore; formed. by. the liner 43: of insulating. material;
The trailer-.44 is also. formedof .a material which.
evolvesian arc: extinguishing medium. For ex ample. it may be formed otmethyl 'methacrylate resin; Ports 45: are provided;inthe'conducting' member: 26. and. extend radially therefrom. for;
venting; the interior terrupter. 25 so that be builtup within it ingoperation. The with a shoulder 46 spaced from its upper. end for cooperating with a. tubular stop member 4'i. that is carriediby ametallic fitting threaded into' the lower end of" the. insulating. sleeve 38': The stop member. 411-has anzint'urned lower end? portion 49*whichcooperateswith the shoulder 46,. as .shown more clearly-in'Figure 9 .ofv the=drawings,. to limit the downward movement of'the rodlike-contact 4!.
Provision is. madev for maintaining the rodlike, contacti 4l inengagement: with the-ringlike contact-39 asshown in. the rodlike contact. 4 l iszprovidedwitht ashoulde'rv 52; near its:.lower end whichis arrangedto co.- operate with resilient fingers=53that'J-are: carried by and dependfrom themetallic-ntting 48'. A garter spring 54 urgesltheir lower contact engagement with the underside of. the shoulder 52':
of the auxiliary circuit induring. the; circuit: interrupt:-
is in engagement with the'ringlikecontact 39'; However, when sufficient. force isapplied to'the rodlike. contact, the shoulder 52"moves: down.- wardly to suchposition th 53ammoved out of engagement therewith, as shown in- Figure 8, whereuponthe rodlikecontact 4 I can move quickly-toward the open circuit: position.
It" is importanttdknow whether the contacts Wand-4i are in engagement or out: of'engagement. For this purpose an indicator 55 is employed. Asshown in Figure '7, it. constitutes.- an extension of the lower end oftherodlike contact 4|. Its indicating function willibe described: in more detail hereinafter.
A flanged metallic fitting: 56' transverse pin 51 position just below metallic fitting 56 58; depending from the metallic fitting 48', forlimiting the upward movement ofthe rodlike contact 4| and positioning its'upper'end contact portion. properly with respect to the ringlike contact 39.
Surrounding and telescoped with the insulating sleeve 38 and freely axially rotatable with re-- spect thereto is a metallic sleeve 59. At its upper end the metallic sleeve 59 hasan end? ring 601 against the underside of'which a coillcompression spring 61' reacts; It will; be; observed; that is secured. by: a
The. liner 43 destructive pressure will "not.
rodlike' contact 4 I is provided" Figure 7; For thispurpose surrounds thefingers 5.33 and; inturned ends into mechanical This construction. serves. to hold" the'rodllke contact 41 in the position where it'- at the resilient finger to the rodlike contact 4|; at: a. the shoulder 52. This'flanged; cooperates with alspacersleevebear outwardly against the inner surface ofJthesleeve 591 At'the lower end of the metallic sleeve 59.- there isa. closure; disc 63 which is provided with apertures. 84 for venting the interior of. the auxiliary circuit-interrupter 25. The closure disc Ba also has a centralaperture through which the indicator 55- projects and from which it may be withdrawn as shown in Figure 8'.
It is. desirable to limit the relative movement. apart of themetallicsleeve S'Eancl the insulating sleeve 38- and to prevent accidental reclosure. of:
the. contacts 39 and 4!. For this purpose, the: latter is provided with an annular slot 66 and the former: carries a detent 6? spring biased by a resilient arm 68 that is secured by a rivet 69 to the outer surface of the sleeve 59 near its upper end. The inner end of the detent, filrides over the surface of the insulating sleeve 38* until it: reaches the annular slot (-26. As shown in Figure 8; the detent 68- has moved through an opening 7.0 in the end ring 6i? and into the annular slot 6.6 prior to the forcing of the shoulder 52 past the resilient fingers 53 and separation of the rodlikecontact 41 from the ringlike contact 39 where it prevents any further downward movement of the metallic sleeve 59 with respect to the insulating sleeve 38. Should the downwardly acting force applied. to the sleeve 59' be released, thedetent: 61. reposing in the annular slot 65, pro.- vents the spring (51 from eiiecting accidental reclosure of the contacts 39 and 4!.
Intermediate the ends of the metallic sleeve 59" a metallic support bracket '13 is clamped. Formed integrally therewith, Figure 6, is an'arm 14 which is'arranged to receive a detachable fitting-15 mounted on the upper end of a live line w stick 16-. Ordinarily the liveline stick (6 is a suitably seasoned and treated wood pole which hashigh insulating qualities and is arranged to bemanipulated by a lineman on the ground; for operating various live line tools which are employed. for performing operations on a circuit while the'conductors are energized at high voltage. The fittingl'd'is clamped to the arm 14 by a-bolt- 17 and a cooperating wing nut 78.
Since the fuse tube i5 swings in an are about the: pivot I4 and the pull ring 22. moves therewith, provision is made for accommodating this relative movement of the pull ring 22 with re spect to the auxiliary circuit interrupter 25; In accordancewith this invention, there is provided a contact. arm, shown generally at 79, which is rockably mounted on the arm 74. For this purpose a shaft 89 is, employed and it has formed integrally therewith a shoulder 84, Figure 7, which cooperates with a stop pin 82. The shoulder 81 and stop pin 82' limit the movement of the contact arm 19 in a clockwise direction but permit it' to-swing in a counterclockwise direction to the position shown by the broken lines in Figure 7:. A torsion spring 83,,having one end 1 84. fastenedtothe arm 14-: and the-other end-8.5:
from the closed fastened to a flange 86 secured by a transverse pin 81 to the outer end of the shaft 89, serves to bias the contact arm 19 against the stop pin 82. If desired, the shoulder 8| and stop pin 82 may be omitted and the spring 83 can be arranged to function as a centering spring biasing the contact arm 19 to the position shown by the full lines in Figure 'I and permitting it to swing therefrom in either direction as may be required in the manipulation of the auxiliary circuit interrupter 25.
Referring particularly to Figure 6, it will be observed that the contact arm i9 includes a shank 99 which is fixed on and carried by a head 9! which forms an integral part of the shaft 89. At its upper end the shank 90 has a contact finger 92 extending at right angles with a bulbous outer end 93 to facilitate entry into the opening in the pull ring 22. With a view to maintaining electrical contact with the pull ring 22 a cooperating contact finger 9% is employed. It extends parallel to the contact finger 92 and has an inclined outer end 95 to facilitate cooperation with the pull ring 22. The contact finger 94 extends at right angles from and is carried by a sleeve 96 which is telescoped over the shank 99 and which is biased upwardly by a coil compression spring 91. Movement of the sleeve 95 with respect to the shank 99 is limited by a slot 98 in the sleeve 95 and a stop pin 29 extending therethrough from the shank 99.
It will be understood that the spring 33 transmits its force through the contact finger 92 to bear against the inside of the pull ring 22. Where this contact engagement is sufiicient, particularly where the spring 33 functions as a centering spring as described above, sufficient contact pressure is maintained against the pull ring 22 so that, if desired, the cooperating contact finger 94 and parts associated therewith can be omitted. In such case reliance is placed on the biasing action of the spring 83 for maintaining the desired contact engagement.
In Figure of the drawings, there is illustrated a modified contact arm construction. As shown generally at N2, the contact arm is constructed so that the contact fingers thereoi bear radially outwardly against the opening of the pull ring 22. For this purpose there is provided a sleeve 93 which is carried by the head 9| on the outer end of the shaft 89. Projecting at right angles from the sleeve E93 is a contact finger EM whose outer end H95 is inclined upwardly to facilitate entry into the pull ring 22. Slidably mounted within the sleeve m3 is a shank 285 having a transverse pin it! extending therefrom through a slot I98 in the sleeve [93 to limit relative movement between the 96 and the sleeve 33. The shank W6 carries a contact finger 599 at its upper end which extends parallel to the contact finger 94 and has an inclined outer end H9 to facilitate entry into the opening of the pull ring 22. The contact finger [99 also has a shoulder Hi which cooperates with the pull ring 22 to maintain mechanical and electrical engagement therewith. A coil compression spring H2 reacts between the upper end of the sleeve [95 and a washer H3 secured to the upper end of the shank I96 for biasing the contact finger W9 upwardly so as to maintain good mechanical and electrical contact engagement with the inner surface of the pull ring 22 at diametrically opposite locations.
In operation the auxiliary circuit interrupter, carried by the live line stick 76 as illustrated in shank Figure 3, is manipulated so that the eye member 29 engages the conducting arm 24 on the sleet hood 23 and the contact arm 19 engages the pull ring 22. This is facilitated by the swivel mounting of the eye member 29 and the fact that the metallic sleeve 59, to which the live line stick 16 is attached by the support bracket 13, is rotatable with respect to the longitudinal axis of the auxiliary circuit interrupter, more particularly the longitudinal axis of the insulating sleeve 38. It will be understood that either form of contact arm 19 or Hi2 can be employed. When the auxiliary circuit interrupter 25 is positioned as described, the contacts 39 and 4| therein are in engagement and the parts are positioned as shown more clearly in Figure '7. A shunt circuit then is established between the upper terminal assembly I2 of the circuit breaker I0 and the fuse tube terminal assembly 16 through the conducting arm 24, eye member 29, relatively fixed conducting member 26, conducting sleeve 49, contacts 39 and ll, flanged metallic fitting 56, resilient contact fingers 62, metallic sleeve 59, support bracket 13, and contact arm 19 to the pull ring 22.
Now the live line stick it is manipulated by pulling on it lengthwise to the position shown in Figure 4. Since the support bracket 13 is fastened to the metallic sleeve 59 and since the eye member 29 prevents movement of the insulating sleeve 38, the metallic sleeve 59 is moved away from the insulating sleeve 38, as shown in Figure 4, and compression of the coil spring 62 is begun. However, the resilient fingers 53 are strong enough to hold the rodlike contact 4! against the force initially exerted by the spring 65 and thus, while the metallic sleeve 59 is being moved downwardly to the position shown in Figure 4, the contacts 39 and M remain in engagement completing the shunt circuit previously described. Since the contact arm 19, which is in engagement with the pull ring 22, moves downwardly with the metallic sleeve 59, as manipulated by the live line stick 16, the arm 20 is operated so as to lift the sleeve IT and remove the hook l8 from engagement with the roller Hi. This is followed by a swinging movement of the fuse tube IE to the position shown in Figure 4. Because the shunt circuit is maintained by engagement of the contacts 39 and M within the auxiliary circuit interrupter 25, no arcing occurs between the terminal assemblies l2 and I6 when they separate.
As illustrated in Figure 5, the continued'manipulation of the live line stick 1'6 causes the fuse tube 15 to swing further away from the closed position. This is accompanied by a further compression of the spring 6!. The metallic tube 59 is operated to the position shown in Figure 8 where the detent El enters the groove 96 and prevents further movement apart Or reverse movement. After this occurs and the spring 6| has been compressed to a point where the force exerted by it is greater than the restraining force exerted by the resilient fingers 53 on the shoulder 52, they are no longer capable of restraining downward movement of the rodlike contact il. Alternatively the coil compression spring may be compressed to the solid position where the downward pull on the live line stick it is transmitted directly to the flanged metallic fitting 56. In either event, after the metallic sleeve 59 has been locked by the detent 5'! against reverse movement; the rodlike contact 4| is moved downwardly to the position shown in Figure 8 of the following the equal to or greater than'the voltage Furtherit willbe projects 'from theibottom of the metallic :sleeve 69 when the contacts anddl are in-engagecircuit interrupter '2 5 engage the eye member 29 fromthe conducting and the ringlike' contact 39. This eflects a 'corresponding extension of the arc. The trailer =4l movement of the rodlike "contact =4l'into the bore in'the liner 43 assists in extinguishing the arc in-a manner readily understood. At thistime the external'isoiating air gap :between the terminal assemblies I2 and I'Gandthe break distance over'the insulating sleeve 38- are break distance between-the contacts 39 and withinthe auxiliary circuit interrupter '25,'thereby avoidin'g the likelihood of external fiashoverdue to high'recovery incident to the circuit interruption. While the 'ro'dlike contact 4| is moving downwe rdly through the metallic-sleeve 59, "contact engagement therebetween is maintainedthrough the resilient contact fingers '62.
It-will be observed that'theindi'cator'55, as
shown in Figure 8 of the drawings, is totally enclosed by the metallic sleeve 59atthe time that the contacts 39 and 4| are first separated.
observed that the indicator 55 -rnent as shown in Figure '7. Also itwill be noted that, when the contacts and are'in the fully opened position, the indicator again projects from the lower This provides apositive indication to the .lineman of'the position of the'contacts 39 and 4|,
.so thathe has definite knowledge that they are :either in the fully closed or fully open position.
The lineman now manipulates the auxiliary in such manner as to dismember '26. This is facilitated by the fact that the metallic sleeve 59 is rotatable about the longitudinal axis of the device. Thereafter'he furthermanipulates the auxiliary circuit interrupter 25 to disengage the contact arm 19 from the pull ring 12. This allows the fuse tube l5 to swing to the full open position under the'infiuence of gravity.
For further use, the auxiliary circuit interrupter'25 .is restored to the'closed position, shown in' Figure 7, by withdrawing the detent 61 from the slot '66 "and allowing the metallic sleeve59 to'be moved by the spring 6] back over themsulating sleeve 38, thereby'operating therodlike contact 4| back into contact engagement with the ringlike contact 39. Of course,'this is accomplished only when the "device is removed entirely from proximity'to an energized part of the electric power system.
Since certain further changes can bemade in the foregoing construction and difierent embodimerits of the invention can be made without departing from the spirit'andscope thereof, it is intendedthat all matter shown in the accompanying drawings and described hereinbefore shall be interpreted as illustrative andnot in a limiting sense.
What is claimed asnew is:
l. Mechanism for opening a high voltage circuit isolating device such as a disconnecting fuse, disconnecting switch or the like, normally carrying line current comprising, in combination, an auxiliary circuit interrupter having a relatively fixedconducting member for attachment'to 2.
end of the metallic sleeve 59.
ment to a stationary stationary energized 'conducting'part of-said circuit isolating device and a relatively movable conducting memberadapted to-be carried-bye live line stick, a contact arm'on sa-idmovable member for attachment to a movable energized conducting part of said circuit isolating'device, relatively fixed and movable contacts in said circuit interrupter connected respectively-to :said fixed and movable 'con'ducting'members, movepart therebetween.
4. The invention,as set forth in claim 2, wherein the contact arm includes a pair of contact fingers biased apart for gripping the interior of a ringlike portionof the inovableenergized conducting part.
5. The invention, as set forth in claim 2,-wherein a-springcooperates with thecontact arm-to bias the same to a predetermined position.
6. The inventioxras set'forth in claim 2,- in a stop is provided'for limiting the swinging movement of the contact arm in one direction, and a spring cooperates with said contact arm to biasthe same against'said stop.
7. Mechanism for opening a high voltage circuit insulating device, such-as a disconnecting fuse, disconnecting switch or the like, normally carrying line current comprising, in combination, an auxiliary circuit interrupter having'a relatively fixed conducting member for attach energized conducting part of said circuit isolating device *and'a relatively movable conducting member adapted to beta!- ried by a live line stick, means'rotatablvmounting said conducting members relative toeach other, a contact arm on said movable member for attachment to a movable energized conducting part of said circuit isolating device, relatively fixed and movable contacts in-said circuit interrupter connected respectivelyto said fixed and movable conducting-members, movement of said movable conducting'memberaway from 'said fixed conducting member efiecting separation of said movable energized conducting part while maintaining a-shunt circuit therebetween through ll separation of said separable contacts to open the circuit, the first mentioned means thereafter being detachable from said parts whereupon the same are permitted to operate to full open circuit position.
9. Mechanism for opening a high voltage circuit isolating device, such as a disconnecting fuse, disconnecting switch or the like, normally carrying line current comprising, in combination, an auxiliary circuit interrupter having a relatively fixed conduct ng member for attachment to a stationary energized conducting part of said circuit isolating device and a relatively'movaole conducting member adapted to be carried by a live line stick, a contact arm on said movable member for attachment to a movable energized conducting part of said circuit isolating device, relatively fixed and movable contacts in said circuit interrupter connected respectively to said fixed and movable conducting members, movement of said movable conducting member away from said fixed conducting member effecting separation of said movable energized conducting port from said stationary energized conducting part while maintaining a shunt circuit therebetween through said contacts, operating means for effecting separation of said contacts when said movable conducting member reaches a predetermined position away from said fixed conducting member, and indicator means cooperating with said movable contact for indicating by its position relative to said auxiliary circuit interrupter whether said contacts are closed or open.
, 10. Mechanism for opening a current carrying high voltage circuit isolating device, such as a disconnecting fuse, disconnecting switch or the like having a transversely extending conducting arm on a stationary energized conducting part and a pull ring on a movable energizing conducting part that is arranged to swing bodily through an arc from closed to open position, comprising, in combination; a tubular auxiliary circuit interrupter having a relatively fixed conducting member at one end, an insulating sleeve extending therefrom, a metallic sleeve telescoped over and movable endwise away from said insulating sleeve, a relatively fixed contact within said insulating sleeve connected to said fixed conducting member, a rodlike contact engaging said relatively fixed contact and movable endwise away therefrom through said insulating sleeve, conducting means interconnecting said rodlike contact and said metallic sleeve during movement thereof relative to said insulating sleeve, and a coil compression spring surrounding said insulating sleeve and reacting between said metallic sleeve and said rodlike contact to bias the latter out of contact engagement with said relatively fixed contact on movement of said metallic sleeve away from said fixed conducting member; a conducting eye member carried by said fixed conducting member for engaging said conducting arm, a support bracket secured to said metallic sleeve and having a part adapted to be mounted on a live line stick for manipulating said auxiliary circuit interrupter and parts associated therewith, and a contact arm rockably mounted on said support bracket.
11. Mechanism for opening acurrent carrying high voltage circuit isolating device, such as a disconnecting fuse, disconnecting switch or the like having a transversely extending conducting arm on a stationary energized conducting part and a pull ring on a movable energized conducting part that is arranged to swing bodily through an are from closed to open position, comprisin in combination; a tubular axiliary circuit interrupter having a relatively fixed conducting member at one end, an insulating sleeve extending therefrom, a metallic sleeve telescoped over and movable endwise away from said insulating sleeve, a relatively fixed contact within said insulating sleeve connected to and spaced from said fixed conducting member, a liner within said insulating sleeve capable of evolving an arc extinguishing medium when subjected to the heat of an arc, a rodlike contact engaging said relatively fixed contact and movable endwise away therefrom through said liner and having spaced shoulders thereon, resilient means carried by said insulating sleeve for engaging said rodlike contact and cooperating with one of said shoulders to hold said rodlike contact in engagement with said relatively fixed contact, conducting means interconnecting said rodlike contact and said metallic sleeve during movement thereof relative to said insulating sleeve, a coil compression spring surrounding said insulating sleeve and reacting between said metallic sleeve and said rodlike contact to bias the latter out of contact engagement with said relatively fixed contact on movement of said metallic sleeve away from said fixed conducting member to a position where said spring is stressed suificiently to move said one shoulder on said rodlike contact out of restraining engagement with said resilient means, and a stop member carried by said insulating sleeve for cooperating with the other shoulder on said rodlike contact to limit the outward movement thereof under the influence of said spring; a conducting eye member pivoted on said fixed conducting member for engaging said conducting arm, a support bracket secured to said metallic sleeve and having a part adapted to be mounted on a live line stick for manipulating said auxiliary circuit interrupter and parts associated therewith, and a contact arm rockably mounted on said support bracket.
l2. Mechanism for opening a current carrying high voltage circuit isolating device, such as a disconnecting fuse, disconnecting switch or the like having a transversely extendin conducting arm on a stationary energized conducting part and a pull ring on a movable energized conducting part that is arranged to swing bodily through an arc from closed to open position, comprising, in combination; a tubular auxiliary circuit interrupter having a relatively fixed conducting member at one end, an insulating sleeve extending therefrom, a metallic sleeve telescoped over and movable endwise away from said insulating sleeve, a relatively fixed ringlike contact within said insulating sleeve connected to and spaced from said fixed conducting member, a liner within said insulating sleeve capable of evolving an arc extinguishing medium when subjected to the heat of an arc, a rodlike contact engaging said relatively fixed ringlike contact and movable endwise away therefrom through said liner and having spaced shoulders thereon, an insulating trailer movable with said rodlike contact through said relatively fixed ringlike contact and into said liner, resilient fingers carried by said insulating sleeve for cooperating with one of said shoulders to hold said rodlike contact in engagement with said ringlike contact, conducting means interconnecting said rodlike contact and said metallic sleeve during movement thereof relative to said insulating sleeve, a coil compression spring surrounding said insulating sleeve and reacting between said metallic sleeve and .said rocllike contact to bias the latter out of contactengagement with said relatively fixed ringlike contact on movement of said metallic sleeve. away fromsaid fixed conducting member to a. position where said spring-is stressed-sufiiciently'to movesaid one shoulderon said rodlike-contact out of restraining engagement with said resilient fingers, and a stop member carried by said insulating sleeve for cooperating with the other shoulder on said rodlike contact to limit the outward movement thereof under the infiuen'ce of said spring; a conducting eye member pivoted on said fixed conducting member and including resilient means for engaging said conducting arm, a support bracket secured to said metallic sleeve. and having apart adapted'to-be mounted on a live line stick for manipulating said auxiliary "circuit interrupter and parts :associatedtherewith, and a contact arm rockabl-y mountedon said support bracket and including spring biased gripping means for engaging said pull ring to establish both mechanical connection and electrical contact therewith.
13. Mechanism for opening a current carrying high voltage circuit isolating devicesuch as a disconnecting fuse, disconnecting switch or the like having a transversely-extending conducting arm on a stationary energized conductin part that is arranged to swing bodily through an'arc from closed to open position comprising, in combination; a tubular auxiliary circuit interrupter having a relatively fixed conducting member at one end, an insulating sleeve extending therefrom, a metallic sleeve telescoped over and movable endwi'se awayfrom said insulating sleeve, a ringlike contact within said insulating sleeve connected to and spaced from said fixed conducting member, a liner within said insulat'ng sleeve capable of evolving an arc extinguishingmedium when subjected to the heat of an are, a rodlike contact engaging said ringlilte contactzand movable endwise away therefrom through said liner and having spaced shoulders thereon, an insulating trailermovable with said rodlike contact through said rin'glike contact and into said liner, resilient fingers carried by said insulating sleeve for cooperating with one of said shoulders to hold it-in engagement with said ringlike contact, conducting means interconnecting said rodlilte contact and saidmetallic sleeve during movement thereof relative to saidinsulating sleeve; a coil 7 compression spring surrounding said insulating sleeve and reacting between said metallic sleeve and said rodlike contact to biasthe latter out of contact engagement with said rin-glike contact on movement of said metallic sleeve away from said fixed conducting member to a position where said spring isv stressed 'sufiiciently to move said one shoulder on said rodlike contact out of restraining engagement with said resilient fingers, and a stop member carried by said insulating sleeve for cooperating with the othersh'oulder on said rodlike contact to limit the outward movement thereof under the influence of said spring; a conducting eye member pivoted on said fixed conducting member and including resilient means for engaging said conducting arm, a support bracket secured tosaid metallic sleeve and having a part adapted to be mounted onal-i-ve-line stick for'man-ipulating said auxiliary circuit interrupter and partsassoci'ated--'therewith, and a contact arm rockably 'mounted cn said support bracket and including spring biased gripping means for engaging said-pull ring to establlsh both mechanicalconnection and electrical :contact therewith.
l4. 'Mechanism for opening :a current carrying high voltage circuit isolating device, such as a disconnecting fuse, disconnecting switch orlthe like having a transversely extending conducting arm on a stationary energized conducting part and a pull ring on amovable energizedconducting part that is arranged to swingbodilythrough an are from closed to open position, comprising, in combination; a tubular auxiliary circuit interrupter having a relatively fixed conducting member at one end, an insulating sleeve extending therefrom, a metallic sleeve telescoped over and movable end-wise away from said insulating sleeve, a relatively fixed contact Within said insulating sleeve connected to and spaced from said fixed conducting member, a rod-like contact engaging said relatively fixedcontact and movable endwise away therefrom through said insulating sleeve and having spaced shoulders thereon, indicator means cooperating with said rod like contactand showing when said contacts are engaged :and when fully disengaged, resilient fingers carried by said insulating sleeve cooperating with one of said shoulders to hold it in engagement with said relatively fixed contact, contact means interconnecting said rodlike contact and said metallic sleeve during movement thereof relative to said insulating sleeve, a coil compression spring surrounding said insulating sleeve and reacting between said metallic sleeve and said rodlike contact to bias the latter out of contact engagement with said relatively fixed'contact on movement of said metallic sleeve away from said fixed conducting member to a position where said spring is stressed sufficiently to move said one shoulder on said rodlike contact out of restraining engagement with said resilient fingers, a stop thereof under the influence of said spring, and means cooperating with said insulating and metallic sleeves for limiting movement thereof apart and locking them in released position; a-c'onducting eye member pivoted on said fixed conducting member and including resilient means for en*-= h gh voltage circuit isolating device, such as a ing part that is arranged to swing bodily through an are from closed toopen position, comprising, in combinationra tubular auxiliary circuit interrupter' havinga relatively fixed conducting meminsulating sleeve extending tact means interconnecting said rodlike contact and said metallic sleeve during movement thereof relative to said insulating sleeve, and a coil compression spring surrounding said insulating sleeve and reacting between said metallic sleeve and said rodlike contact to bias the latter out of contact engagement with said relatively fixed contact on movement of said metallic sleeve away from said fixed conducting member; a conducting eye member pivoted on said fixed conducting member for engaging said conducting arm and including a pair of contact extensions biased toward each other for engaging said conducting arm therebetween under pressure, a support bracket secured to said metallic sleeve and having a part adapted to be mounted on a live line stick for manipulating said auxiliary circuit interrupter and parts associated therewith, a contact arm rockably mounted on said support bracket, spring biased gripping means carried by said contact arm for engaging said pull ring to establish both mechanical connection and electrical contact therewith, said contact arm being arranged to rock relative to said auxiliary circuit interrupter on movement of said metallic sleeve away from said fixed conducting member while the same is held stationary by interaction of said conducting arm and said eye member and said gripping means being arranged to move conjointly with said pull ring as said energized conducting part of said circuit breaker swings to the open position, and a spring interacting between said bracket and contact arm to bias the latter to a predetermined position.
16. Mechanism for opening a current carrying high voltage circuit isolating device, such as a disconnecting fuse, disconnecting switch or the like having a transversely extending conducting arm on a stationary energized conducting part and a pull ring on a movable energized conducting part that is arranged to swing bodily through an are from closed to open position, comprising, in combination; a tubular auxiliary circuit interrupter having a relatively fixed conducting member at one end, an insulating sleeve extending therefrom, a metallic sleeve telescoped over and movable endwise away from said insulating sleeve, a ringlike contact within said insulating sleeve connected to and spaced from said fixed conducting member, a liner within said insulating sleeve capable of evolving an arc extinguishing medium when subjected to the heat of an are, a rodlike contact engaging said ringlike contact and movable endwise away therefrom through said liner and having spaced shoulders thereon, an insulating trailer movable with said rodlike contact through said ringlike contact and into said liner, an indicator extending endwise from said rodlike contact out of said metallic sleeve when said contacts are engaged and when fully disengaged, resilient fingers carried by said insulating sleeve cooperating with one of said shoulders to hold said rodlike contact in engagement with said ringlike contact, contact means interconnecting said rodlike contact and said metallic sleeve during movement thereof relative to said insulating sleeve, a coil compression spring surrounding said insulating sleeve and reacting between said metallic sleeve and said rodlike contact to bias the latter out of contact engagement with said ringlike contact on movement of said metallic sleeve away from said fixed conducting member to a position where said spring is stressed sufiiciently to move said one shoulder on said rodlike contact out of restrainmg engagement with said contact fingers, a stop member carried by said insulating sleeve for cooperating with the other shoulder on said rodlike contact to limit the outward movement thereof under the influence of said spring, and spring biased detent means cooperating with said insulating and metallic sleeves for limiting movement thereof apart and locking them in released position; a conducting eye member pivoted on said fixed conducting member for engaging said conducting arm and including a pair or contact extensions biased toward each other for engaging said conducting arm therebetween under pressure, a support bracket secured to said metallic sleeve and having a part adapted to be mounted on a live line stick for manipulating said auxiliary circuit interrupter and parts associated therewith, a contact arm rockably mounted on said support bracket, spring biased gripping means carried by said contact arm for engaging said pull ring to establish both mechanical connection and electrical contact therewith, said contact arm being arranged to rock relative to said auxiliary circuit interrupter on movement of said metallic sleeve away from said fixed conducting member while the same is held stationary by interaction of said conducting arm and said eye member and said gripping means being arranged to move conjointly with said pull ring as said energized conducting part of said circuit breaker swings to the open position, a stop on said bracket limiting rocking movement of said contact arm in one direction, and a spring interacting between said bracket and contact arm to bias the latter against said stop.
l7. Mechanism for opening a high voltage circuit by manipulation of a live line stick comprising, in combination, a circuit interrupter having a relative fixed conducting member for connection to an energized part of said circuit and a relatively movable conducting member adapted to be carried by said live line stick and to be connected to a circuit to be disconnected from said energized part, and relatively fixed and movable contacts in said circuit interrupter connected respectively to said fixed and movable conducting members, movement of said movable conducting member by said live line stick away from said fixed conducting member effecting separation of said contacts and thereby disconnection of said circuits.
18. Mechanism for opening a high voltage circuit by manipulation of a live line stick comprising, in combination, a circuit interrupter having a relatively fixed conducting member for connection to an energized part of said circuit and a relatively movable conducting member adapted to be carried by said live line stick and to be connected to a circuit to be disconnected from said energized part, relatively fixed and movable contacts in said circuit interrupter connected respectively to said fixed and movable conducting members, and operating means cooperating with said movable conducting member when the same is moved by said live line stick away from said fixed conducting member and said contacts for separating them with a snap action when said movable conducting member reaches a predetermined position away from said fixed conducting member whereby said circuits are disconnected.
19. Mechanism for opening a high voltage circuit by manipulation of a live line stick comprising, in combination, a circuit interrupter having a relatively fixed conducting member; for
, connection to an energized part of said circuit and a relatively movable conducting member adapted to be carried by said live line stick and to be connected to a circuit to be disconnected from said energizing part, relatively fixed and movable contacts in said circuit interrupter connected respectively to said fixed and movable conducting members, operating means cooperating with said movable conducting member when the same is moved by said live line stick away from said fixed conducting member and said contacts for separating them with a snap action when said movable conducting member reaches a predetermined position away from said fixed conducting member whereby said circuits are disconnected, and are extinguishing means operating with said contacts for extinguishing the arc therebetween on separation thereof.
20. Mechanism for opening a high voltage circuit isolating device such as a disconnecting fuse, disconnecting switch or the like, normally carrying current and having a stationary normally energized terminal contact member and a current carrying member movable into and out of engagement therewith by manipulation of a live line stick, said mechanism comprising, in combi" nation, an auxiiiary circuit interrupter having contact means for connection to said terminal contact member and additional contact means for connection to said movable current carrying member, said auxiliary circuit interrupter when closed providing a shunt circuit between said terminal contact member and said movable current carrying member, said auxiliary circuit interrupter being adapted to be carried by said live line stick and to be manipulated by an operator to disengage said movable current carrying member from said terminal contact member while said shunt circuit is maintained, and means for operating said auxiliary circuit interrupts to open said shunt circuit after said movable current carrying member disengages said terminal contact member.
21. Mechanism for opening a high voltage circuit isolating device such as a disconnecting fuse, disconnecting switch or the like, normally carryin, current and having a stationary normally energized terminal contact member and a current carrying member movable in a plane into and cut of engagement therewith by manipulation or" a live line stick, said mechanism comprising, in combination, an auxiliary circuit interrupter having contact means for connection to said terminal contact member and additional contact means for connection to said movable current carrying member, said auxiliary circuit interrupter when closed providing a shunt circuit between said terminal contact member and said movable current carrying member, said auxiliary circuit interrupter being adapted to be carried by said live line stick and to be manipulated by an operator to disengage said movable current carrying member from said terminal contact member while said shunt circuit is maintained, the connections between said auxiliary circuit interrupter and said terminal contact member and between said auxiliary circuit interrupter and said movable current carrying member being suificiently flexible to allow the manipulation of said live line stick with a substantial range of movement in planes other than said plane of movement of said movable current carrying member and planes parallel thereto, and means for operating said auxiliary circuit interrupter to open said shunt circuit after said movable current carrying member disengages said terminal contact member.
22. Mechanism for opening a high voltage circuit isolating device such as a disconnecting fuse, disconnecting switch or the like, normally carrying current and having a stationary normally energized terminal contact member and a current carrying member movable in a plane into and out of engagement therewith by manipulation of a live line stick, said mechanism comprising, in combination, an auxiliary circuit interrupter having contact means for connection to said terminal contact member and additional contact means for connection to said movable current carrying member, said auxiliary circuit interrupter when closed providing a shunt circuit between said terminal contact member and said movable current carrying member, said auxiliary circuit interrupter being adapted to be carried by said live line stick and to be manipulated by an operator to disengage said movable current carrying member from said terminal contact member while said shunt circuit is maintained, the connections between said auxiliary circuit interrupter and said terminal contact member and between said auxiliary circuit interrupter and said movable current carrying member being sufficiently flexible so that it is unnecessary to exert a pull on said live line stick in said plane of movement of said movable current carrying member or in a plane parallel thereto to manipuiate said auxiliary circuit interrupter, and means for operating said auxiliary circuit interrupter to open said shunt circuit after said movable current carrying member disengages said terminal contact member.
23. Mechanism for opening a high voltage circuit isolating device such as a disconnecting fuse, disconnecting switch or the like, normally carrying current and having a stationary normally energized terminal contact member and a current carrying member movable into and out of engagement therewith by manipulation of a live line stick, said mechanism comprising, in combination, an auxiliary circuit interrupter having contact means for connection to said terminal contact member and additional contact means for connection to said movable current carrying member, said auxiliary circuit interrupter when closed providing a shunt circuit between said terminal contact member and said movable current carrying member, said additional contact means including a flexibly mounted conducting member having a portion engaging said movable current carrying member and movable therewith as it moves away from engagement with said terminal contact member, said auxiliary circuit interrupter being adapted to be carried by said live line stick and to be manipulated by an operator to disengage said movable current carrying member from said terminal contact member while said shunt circuit is maintained, and means for operating said auxiliary circuit interrupter to open said shunt circuit after said movable current carrying member disengages said terminal contact member.
24. Mechanism for opening a high voltage circuit isolating device such as a disconnecting fuse, disconnecting switch or the like, normaliy carrying current and having a stationary normally energized terminal contact member and a current carrying member movable in a plane into and out of engagement therewith by manipulation of a live line stick, said mechanism comprising, in combination, an auxiliary circuit interrupter hav- L19 ing contact means for connection to said terminal contact mem er and additional contact :imeans 'for connection tosaid movable current 'carrying member, said auxiliary circuit interiruptertwhen closed providing a shunt circuit be- :tween said terminal contact member and said movable current carrying member, said auxiliary circuit interrupter being'adapted to be carried "by said live line stick andto be manipulated by :an operator to disengage said movable current carrying member from said terminal contact lmember whilesaid shunt circuit is maintained, the connections between said auxiliary circuit in iterrupter andsaid terminal contact member and ibetwe'en said auxiliary circuit interrupter and said :movable current carrying member being sufficiently flexible to allow the manipulation of said live line stick with a substantial range of movement in planes other than said plane of ,movement of said movable current carrying memiber4andplanes parallel thereto, the connection "between said auxiliary circuit interrupter and isaidimovable current carrying member'including aiconducting'member pivot-ally mounted with respect to'the former at one end and at the other fend-movable with said current carrying member as the samemoves in saidplane away from said tterminal contact member, and means for operatzing'saidauxiliary-circuit interrupter to open said rshuntlcircuit after said movable current carrying :member disengages said terminal contact memiber.
'25. :Mechanismioropening a nigh voltage circuitisoiating devicesuchasa disconnecting fuse, disconnecting switch or the like, normally carrying currentand having a stationary normally aenergized terminal contact. member and a current carrying member a plane parallel thereto said auxiliary 320 movable in a plane into'and out of engagement therewith by manipulation'of a live line stick, said nrechanism comprising, in combination,an auxiliary circuit interrupterhaving contact means for connection to said'terminal contact member andadditional contact means for connection to said movable current carrying member, said additional contact means including aconducting memberpivoted at one end 1m said auxiliary circuit-interrupter and at'the other end adapted to be looselypivoted'to said current carrying member and movable therewith as. it moves in said plane awayifrom said terminal'co'ntact membensaid auxiliary circuit interrupter whenclosed providing a shunt circuit between said terminal contact member and said movable current carrying member saidauxiliary circuit interrupter being adapted to be carried by said live line stick and to be manipulated by an operator to disengage said movable current carrying member from said terminal contact member while said shunt circuitis maintained, the connections between said. auxiliary circuit interrupter and said terminal contact member and between said auxiliary circuit interrupter and said movable current carrying member-being sufilciently flexible so that it is unnecessary to exert a pull on said live line stickin said plane of movement of said movable current carrying member or in to manipulate said auxiliarycircuit interrupter, and means for operating circuit interrupter to open said shunt circuit after said movable current carrying member disehgagessaid terminal contact member.
SIGURD I. LINDELL 'No referencescited.
US362891A 1953-06-19 1953-06-19 Circuit interrupter construction Expired - Lifetime US2671142A (en)

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Publication number Priority date Publication date Assignee Title
US2716681A (en) * 1953-10-27 1955-08-30 Gen Electric Circuit interrupting device
US2816981A (en) * 1956-03-06 1957-12-17 S & C Electric Co Circuit interrupter construction
US2816982A (en) * 1956-03-13 1957-12-17 S & C Electric Co Circuit interrupter construction
US2816980A (en) * 1955-03-09 1957-12-17 S & C Electric Co Circuit interrupter construction
US2820867A (en) * 1954-05-05 1958-01-21 Gen Electric Enclosed cutout having a load break device
US2824190A (en) * 1956-03-14 1958-02-18 S & C Electric Co Circuit interrupter construction
US2843703A (en) * 1954-02-04 1958-07-15 Clark Controller Co Fuse protective system
DE1114884B (en) * 1954-02-24 1961-10-12 S & C Electric Company Eine Na Device with hook-in circuit breaker for arc-free switching off of a swiveling high-voltage disconnect knife or fuse
US3062936A (en) * 1960-03-08 1962-11-06 Uscd Power Equipment Corp Circuit element removal equipment
DE1149071B (en) * 1957-01-07 1963-05-22 S & C Electric Company Eine Na Suspended circuit breaker for high voltage disconnector or the like.
DE1440900B1 (en) * 1963-02-27 1971-03-18 Calor Emag Elek Zitaets Ag HIGH VOLTAGE DISTRIBUTION SYSTEM
US5650602A (en) * 1995-06-07 1997-07-22 Utility Solutions, Inc. Circuit interrupting apparatus and method for high current power lines

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
None *

Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2716681A (en) * 1953-10-27 1955-08-30 Gen Electric Circuit interrupting device
US2843703A (en) * 1954-02-04 1958-07-15 Clark Controller Co Fuse protective system
DE1114884B (en) * 1954-02-24 1961-10-12 S & C Electric Company Eine Na Device with hook-in circuit breaker for arc-free switching off of a swiveling high-voltage disconnect knife or fuse
US2820867A (en) * 1954-05-05 1958-01-21 Gen Electric Enclosed cutout having a load break device
US2816980A (en) * 1955-03-09 1957-12-17 S & C Electric Co Circuit interrupter construction
US2816981A (en) * 1956-03-06 1957-12-17 S & C Electric Co Circuit interrupter construction
US2816982A (en) * 1956-03-13 1957-12-17 S & C Electric Co Circuit interrupter construction
US2824190A (en) * 1956-03-14 1958-02-18 S & C Electric Co Circuit interrupter construction
DE1149071B (en) * 1957-01-07 1963-05-22 S & C Electric Company Eine Na Suspended circuit breaker for high voltage disconnector or the like.
US3062936A (en) * 1960-03-08 1962-11-06 Uscd Power Equipment Corp Circuit element removal equipment
DE1440900B1 (en) * 1963-02-27 1971-03-18 Calor Emag Elek Zitaets Ag HIGH VOLTAGE DISTRIBUTION SYSTEM
US5650602A (en) * 1995-06-07 1997-07-22 Utility Solutions, Inc. Circuit interrupting apparatus and method for high current power lines
US5861595A (en) * 1995-06-07 1999-01-19 Utility Solutions, Inc. Circuit interrupting apparatus and method for high current power lines

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