US3801765A - Isolating switch with particular toggle and interlock means therefor - Google Patents

Isolating switch with particular toggle and interlock means therefor Download PDF

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Publication number
US3801765A
US3801765A US00317330A US31733072A US3801765A US 3801765 A US3801765 A US 3801765A US 00317330 A US00317330 A US 00317330A US 31733072 A US31733072 A US 31733072A US 3801765 A US3801765 A US 3801765A
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United States
Prior art keywords
switch
actuating arm
rotatable
handle
movable contact
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
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US00317330A
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English (en)
Inventor
A Hodgson
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Westinghouse Electric Corp
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Westinghouse Electric Corp
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Filing date
Publication date
Priority to CA134,672A priority Critical patent/CA958741A/en
Priority to GB1761572A priority patent/GB1384586A/en
Priority to FR7215034A priority patent/FR2134589B1/fr
Priority to JP4229872A priority patent/JPS489260A/ja
Application filed by Westinghouse Electric Corp filed Critical Westinghouse Electric Corp
Priority to US00317330A priority patent/US3801765A/en
Application granted granted Critical
Publication of US3801765A publication Critical patent/US3801765A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H3/00—Mechanisms for operating contacts
    • H01H3/32—Driving mechanisms, i.e. for transmitting driving force to the contacts
    • H01H3/46—Driving mechanisms, i.e. for transmitting driving force to the contacts using rod or lever linkage, e.g. toggle
    • 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
    • H01H31/02—Details
    • H01H31/04—Interlocking mechanisms
    • H01H31/06—Interlocking mechanisms for interlocking between casing, cover, or protective shutter and mechanism for operating contacts
    • 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
    • H01H31/26—Air-break switches for high tension without arc-extinguishing or arc-preventing means with movable contact that remains electrically connected to one line in open position of switch
    • H01H31/28—Air-break switches for high tension without arc-extinguishing or arc-preventing means with movable contact that remains electrically connected to one line in open position of switch with angularly-movable contact
    • H01H31/283—Air-break switches for high tension without arc-extinguishing or arc-preventing means with movable contact that remains electrically connected to one line in open position of switch with angularly-movable contact wherein the contact or contacts are rectilinearly movable with respect to the carrying member
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H33/00—High-tension or heavy-current switches with arc-extinguishing or arc-preventing means
    • H01H33/02—Details
    • H01H33/04—Means for extinguishing or preventing arc between current-carrying parts
    • H01H33/12—Auxiliary contacts on to which the arc is transferred from the main contacts
    • H01H33/121—Load break switches

Definitions

  • a manually-operable handle mechanism with an improved latch is arranged to be mounted on the front of an operating cabinet enclosing the isolating switch mechanism, so that several cabinets may be mounted side-by-side in flush contiguous arrangement.
  • PAIENIEUAPR 2 I974 sum 07 0F '12 OPEN POSITION FIG. 22
  • Motor starters and other feeder circuits are usually supplied with some sort of manually-operated isolating switch, which may be opened to isolate the particular circuit from its source of power without having to deenergize the main power supply.
  • Such an isolating device may be of the load-break type.
  • Such a switch may be classified as a non-load-break device, and is not required to interrupt rated current, it is, however, nevertheless quite often required to interrupt auxiliary loads, such as a control-transformer primary current, static exciter loads, etc., so that good are interruption is still desirable.
  • Such a switch additionally, may be mounted either in the same enclosure as the motor starter, or at some remote location, and will be referred to herein as an isolating switch," but is also commonly known as a disconnect switch, or sometimes as a safety switch in the electrical industry, as well known by those skilled in the art.
  • Switches of this type are available from numerous sources, and employ various designs ranging from low cost to expensive, but all of the known designs to me have many or all of the following shortcomings:
  • This type of switch may include special individual insulators for each phase and complicated contact details.
  • the operating mechanism in addition use shafts, bearings, linkages, guide rails, handles, etc., which employ expensive forms of construction.
  • Equipment is not suitable for panel mounting.
  • the operating handle mechanism is not suitable for dustite or weatherproof applications.
  • Isolating switch contacts are not visible, as required by some regulations and specifications.
  • the operator may go away and leave the operating handle in a position, which does not provide full contact force or does not provide a safe contact gap.
  • the interlock contacts do not usually open far enough in advance of main contact opening to allow an auxiliary relay or contactor to drop out and unload the isolating switch contacts before the isolating switch contacts open.
  • Theinherent design is such that excessive operating friction is difficult to remove from the contact assemblies and/or the operating mechanism.
  • an isolating or disconnecting switch comprising a movable contact carrier carrying the movable isolating contacts of the switch.
  • the carrier is pivotally mounted to a rotatable actuating arm, which carries a spring and is pivotally mounted to the side support of the switch.
  • the arrangement is such that a manuallyoperated handle assembly and linkage effects positive rotation of the actuating arm and carrier, which through a novel toggle mechanism and a biasing-spring construction, insures high-speed contact opening for good are interruption, and low-speed contact movement when the contacts are engaged during closing to minimize the manual operating effort required.
  • the operation of the manually-operated isolating switch is properly coordinated with a electrically-actuated series contactor, so that the contactor is de-energized prior to the opening of the isolating switch of the present invention.
  • Still a further object of the present invention is the provision of an improved toggle-type of operating mechanism for a safety switch.
  • Still a further object of the present invention is the provision of an improved toggle-operating mechanism for a safety switch, utilizing in conjunction therewith a spring-loaded pawl assembly to ensure an overcenter holding of the switch contacts in both the open and closed-circuit positions thereof.
  • Still a further object of the present invention is the provision of an improved safety-switch construction involving few parts, and requiring no precise alignment of the several components parts.
  • Another object of the present invention is the provision of an improved safety switch, in which the movable isolating contacts are automatically aligned with the stationary isolating contacts by a simple construction.
  • Another object of the present invention is the provision of an improved operating mechanism for a safety switch, in which a dead-center condition is achieved in both the ON and OFF positions of the switch, so that the contacts are locked in both of these positions, to thereby prevent contact operation by the application of shock, vibration, or other external forces, which might act on the moving-contact assembly.
  • Still a further object of the present invention is the provision of an improved safety switch, orisolating switch, which may be adapted for 1,500 volt potentials, and with insulation distances in conformity with NEMA requirements.
  • Yet a further object of the present invention is the provision of an improved handle-operating mechanism and door latching arrangement for a safety switch.
  • Another object of the invention is the provision of an improved isolating switch, manually operated by a handle, such that when the handle is in the OFF position, the operating rod, connecting the switch assembly with the operating handle, is past dead" center, so that the handle is forced tightly against the OFF position stop, when force is applied to close the moving contact assembly, rather than allowing the contacts to be pushed to the closed position.
  • An auxiliary object of the invention is the provision of an improved safety switch, in which when the handle is moved from the OFF position to the contact touch position, the mechanical advantage between the handle and contacts is small, and the contacts will thereby travel at maximum speed.
  • a further object of the present invention is the provision of animproved safety-switch construction, in which the mechanism is arranged so that just prior to reaching the contact touch point, the mechanical advantage of the system increases abruptly to reduce the handle force necessary to engage the contacts.
  • Yet a further object of thepresent invention is the association of a novel cam mechanism, in conjunction with the toggle-operating mechanism ofa safety switch, so that a spring-loaded pawl roller, acting on the slope of the cam plate assembly, acts to hold the main contacts of the isolating switch in the closed-circuit position.
  • Another object of the present invention is the provision of an improved toggle-type operating mechanism for a safety switch, which is manually actuated by a handle, in which, when the handle reaches the ON position, and the main contacts are closed, the movingcontact assembly is past a dead center point, so that the main contacts cannot be opened by exerting force upon the moving contact assemblies tending to effect their opening.
  • Another object of the present invention is the provision of an improvedsafety switch, which is manually operated by a handle, in which, when the handle is moved from the ON position to the OFF position, the moving contact support will travel through its dead center area, during which time the main contacts will remain fully closed, but an electrical interlock is opened by the rotating cross-bar assembly directly, so that it will thereby open immediately to thereby deenergize the series electrically-actuated line contactor before the main isolating contacts start to separate from the stationary isolating contacts.
  • Another object of the present invention is the provision of an improved toggle-operating mechanism for a safety switch, utilizing in cooperation therewith a toggle spring to initiate opening action, and subsequently following collapse of the toggle a spring-biased pawl roller assembly completes the remainder of the opening operation.
  • FIG. 1 is a perspective view of an enclosed isolating switch embodying the'principles of the present invention, and the handle of the device indicating the equipment to be in the open or OFF position;
  • FIG. 2 is an enlarged view looking into the front of the safety-switch enclosure with the'door open and various parts of the enclosure omitted for clarity and with the movable isolating contacts being indicated in the closed-circuit position;
  • FIG. 3 is an end elevational view of the safety-switch mechanism illustrated in FIG. 2, looking in from the left, substantially along the line III-III of FIG. 2, again the isolating contacts being illustrated in the closedcircuit position;
  • FIG. 4 is an end elevational view of the improved safety-switch mechanism of the present invention taken in conjunction with the operating-handle mechanism and linkage, looking in the right of FIG. 2 substantially along the line IV-IV of FIG. 2, the isolating contacts being again illustrated in the closed-circuit position, with the manually-operable handle shown in its upward closed position;
  • FIG. 5 is a front elevational detailed view of the metallic isolation switch movable contact carrier
  • FIG. 5A- is atop plan view of the movable carrier of FIG. 5;
  • FIG. 6 is a view looking in at the left-hand end of the movable contact carrier of FIG. 5 substantially along the line VI-VI of FIG. 5 v
  • FIG. 7 is an end view looking in at the right-hand end of the contact carrier of FIG. 5 substantially along the line VII'VII' of FIG. 5;
  • FIG. 8 is a front elevational view of the movable stabbase block assembly, carrying the movable isolating contacts of the device;
  • FIG. 9 is a detail sectional view taken substantially along the line IXIX of FIG. 8, illustrating the mounting arrangement for the movable isolating contact fingers, whereby a precise alignment thereof is rendered unnecessary;
  • FIG. 10 is a front elevational view of the movable carrier yoke utilized in the improved mechanism of the present invention.
  • FIG. 10A is an end side view of the carrier yoke illustrated in FIG. 10 looking in from the right of FIG. 10;
  • FIG.'11 is a detailed view of the mechanism cam plate, which is utilized in the improved switch mechanism of the present invention.
  • FIG. 12 is a detailed view of the cam crank assembly utilized in conjunction with the improved handleoperating mechanism of the present invention.
  • FIG. 13 is a side elevational view of the crank assembly of FIG. 12;
  • FIG. 14 is'a detailed view of the door latch interlock assembly utilized in conjunction with the improved handle mechanism of the present invention.
  • FIG. 15 is a detailed end elevational view of an interlock plate of the door latch interlock assembly of FIG. 14;
  • FIG. 16 is a side elevational view of the metallic sideplate utilized in the stationary frame pivotally supporting the movable contact carrier;
  • FIG. 16A is an end edge view of the side-plate of FIG. 16 taken along the line XVlAXV1A of FIG. 16.
  • FIG. 17 is a top plan view of the movable cam block utilized in the improved mechanism.
  • FIG. 18' is a side elevational view of the cam block of FIG. 17;
  • FIG. 19 is a detailed side elevational view of the one of the two side plates constituting the interlock lever assembly
  • FIGS. 20 and 21 are detailed views of the pawl lever stationary compression-spring bracket
  • FIG. 22 is a somewhat diagrammatic and simplified view of the switch mechanism and handle position in the switch-open condition
  • FIG. 23 is a view similar to FIG. 22, but illustrating I the closed position of the isolatingswitch, with the handle in the upward ON position;
  • FIG. 24 is a diagrammatic view, similar to that of FIGS. 22 and 23, but illustrating the initiation of a contact-opening operation by an initial downward movement of the handle assembly; 7
  • FIG. 25 is a progressive-further view illustrating the handle mechanism in a continued opening operation during a switch-opening operation
  • FIG. 26 illustrates the handle-operating mechanism in the OFF" position, with the door open, and the handle latched in the OFF position by the, latch pin;
  • FIG. 27 is a sectional plan view taken along the line XXVII-XXVII of FIG. 26;
  • FIG. 28 illustrates a condition in which the handle mechanism is' in the OFF position, with the door closed, and showing how the handle latch is released by the door-hook plate;
  • FIG. 29 is a sectionalplan view XXIX-XXIX of FIG. 28;
  • FIG. 30 illustrates a condition-of the handle mechanism in which the door is closed, and the handle is in the ON" position showing, that the door is latched closed by the latch pin;
  • FIG. 31 isa sectional plan view XXXl-XXXI of FIG. 30
  • FIG.- 32 illustrates a typical wiring'diagram' utilizing the improved safety-switch device of the present inventron
  • FIG. 33 is an enlarged side elevational detail view of the movable door hook plate
  • FIG. 34 is a top plan view of the movable door hook plate of FIG. 33;
  • FIG. 35 is an end elevational view ofthe movable door hook plate of FIG. 33, looking in from the right on FIG. 33;
  • FIG. 36 is an enlarged sectional plan view taken generally along the line XXXl-XXXI of FIG. 30.
  • the enclosed equipment 1 includes a cabinet, or casing2, a door 3, which is hinged at 4, Sand 6 as shown in FIG. 1.
  • the door 3 has a pair of latching handles 7 and 8, which are utilized to secure the door 3 into a closed position, as shown.
  • a padlock (not shown) may be used with each latching handle 7, 8 as desired.
  • the handle 9 itself may be padlocked, if desired either in the ON or OFF position.
  • FIG. 1 a rotatable manually-operable switch-operating handle 9 is provided, which is illustrated in FIG. 1 in the down off position.
  • the handle mechanism 9 is utilized to effect opening and closing operations of the isolating, or disconnecting switch 11, more fully illustrated in FIGS. 24 of the drawings.
  • an electrically-actuated magnetic contactor 13 having circuit connections 15-17, which are more clearly illustrated in FIG. 32 of the drawings.
  • the magnetic contactor 13 is electrically opened and closed by pushbuttons, which are accessible from outside the cabinet casing 2, as shown in FIG.
  • the equipment illustrated in FIG. 1, additionally includes a control circuit 22, 23' (FIG..32), which may,
  • fuses 31, 32, 33 may be included in theseries connections between the isolating, or disconnecting switch 11 and the lowerdisposed electrically-actuated contactor 13, as somewhat illustrated in FIG. 32 of the drawings.
  • FIGS. 24 of the drawings which illustrates the structure and interrelationship between the handle mechanism 34 and the movable contact carrier 35' for the movable isolating contacts 36 of the isolating switch 11, it will be observed that there is provided a metallic base plate, 37, having edge flange portions 37a which is bolted to the back wall 39 of the cabinet 2'. Extending frontwardly from the metallic base plate 37 are two metallic side plates 41, each of which has a configuration more clearly illustrated in FIGS. 16 and 16A of the drawings. A pair .of machine bolts 43 and 44 fixedly secure the two side plates 41 to the side shoulder portions 37a of the back base plate 37, as shown in more detail in FIGS. 2, 3 and 4 of the drawings.
  • the two side plates 41 have a pair of integrallyformed tabs 41a and 41b extending in the same direction, which serve to mount a metallic horizontal bracing strip 46, which supports an insulating line terminal block, generally designated by the reference numeral 48.
  • the insulating terminal block 48 fixedly secures into place the three line terminals L L and L the lower ends of which extend downwardly, and constitute three relatively stationary isolating contacts, designated by the reference numerals 50, 51 and 52.
  • the metallic contact carrier 57 has a pair of apertures 57b formed therein, which serve to provide mounting holes fora strip-like interlocking bar, designated by the reference numeral 56, and having a rearwardly-extending plunger 58 fixedly secured thereto, as shown more clearly in FIG. 3 of the drawings.
  • the plunger 58 serves to open an interlocking switch 60, which is mounted to the left-hand metallic side-plate wall 41, as shown more clearly in FIGS. 2 and 3 of the drawings.
  • the plunger 58 will effect closing of the contacts 62 of the interlocking switch 60 to thereby complete the electrical closing circuit 64 (FIG. 32) to the lower-disposed magnetic I contactor, or motor starter 13, as the case may be.
  • the metallic contact carrier 57 has pivot apertures 57c provided at the lower tab portions 57d of the side edges thereof, as illustrated 'in FIG. 5.
  • Floating pivot .pins 66 pivotally connect the metallic contact carrier 57 to the end rotatable actuating arms 68a of a generally U-shaped crossbar structure, designated by the refefrence numeral 68, and more clearly illustrated in FIGS. and 10A of the drawings.
  • the U- shaped crossbar structure, or rotatable actuating arm 68 is provided with pivot apertures 68b to accommodate the floating pivot pins 66.
  • the U- shaped cross-bar structure, or rotatable actuating arm is provided with supporting pivot apertures 68c to accommodate stationary pivot screws 69, which also pass through stationary pivot apertures 41b (FIG. 16) provided in the two stationary side metallic plates 41 of the switch frame.
  • a biasing tension spring 70 is provided having one end 70a thereof hooked to an aperture opening 68d (FIG. 10) of the bight portion of the U-shaped crossarm 68, and has the other end 70b of the biasing tension spring 70 secured to a movable support pin 72 (FIG. 2), which is bolted to the movable contact carrier 11, is fixedly bolted by a bolt 75 to the movable crossbar arm 68 as shown in FIG. 2, and has a pivotal connection 74a to an operating rod 76, which extends laterally interiorly of the cabinet 2, and is pivotally mounted to a segment-shaped crank plate 78, which is fixedly keyed to'the shaft 80,.which is rotated by the operating handle 9.
  • the handle crank assembly comprises the two spaced crank plates 78 welded to a sleeve 79 (FIG. 12) having a key hole 79a, which is key-primed to the handle-operating shaft 80.
  • a sleeve 79 FIG. 12
  • a handle housing 81 provides opening and closing stops 83, 85 to limit the opening and closing rotative, motion of the manually-operable handle 9, as more fully described hereinafter.
  • FIGS. 22-25 generally illustrate the different positions of the extemally-provided operating handle 9 relative to the positions of the movable contact carrier 35 for the isolating switch 11.
  • the movable cross-bararm or rotatable actuating arm 68 is rotated in a clockwise direction about the fixed pivot 69, to first rotate the entire contact assembly 84 in a counterclockwise direction'about the fixed pivot pin, 69, until the wear pad, designated by the reference numeral 86, hits the cam surface 88 (FIG. 16) on the side of the side plate 41 of the isolating switch frame 90. This position is illustrated in FIG. 25.
  • the present invention results in an isolating switch 11, which is compact, lightweight and employing lowcost component parts throughout the construction thereof. Salient operating features of the present isolating, or disconnecting switch 11 are described hereinafter in the order of their occurrence in moving from Y the OFF to the ON position, and then from the ON position to the OFF position.
  • the cam 88 is shaped so as to force the tips of the moving contact fingers 36 to follow a linear path up- .wardly.
  • the rotating arms 68a of the crossbar 68 acting in conjunction with the moving contact support 35, form a toggle linkage 71, which effects a rapid increase in mechanical advantage, which is maximum when the pivot point66 between these two assemblies approaches dead center.
  • a spring-loaded pawl roller 98 acting on the slope 74a of the cam plate 74, acts to hold the main contacts 36 in the closed position.
  • the pawl roller assembly 98 performs a number of functions. First, as mentioned hereinbefore, in the closed position of the switch, as shown in FIG. 23, the
  • the pawl roller assembly 98- comprises a lever 98a pivoted at 98b on a stationary pivot.
  • the pawl roller pawl roller assembly 98 holds the contacts in the closed position.
  • the spring-biased pawl roller assembly completes the remainder of the opening operation.
  • HANDLE INTERLOCKING MECHANISM (34) Mechanical interlocking is provided between the operating handle 9 and the enclosure door 3 to accomplish the following, as illustrated in FIGS. 22 through 31.
  • the latch pin 87 of FIG. 27 is pushed out of the way by hand to allowthe isolating switch 11 tobe closed, while the enclosure door 3 is open.
  • the mounting screws 89 for the door-hook plate of FIG. 29 may be removed from the front of the door 3 to disengage the hook 95 from the door 3, or, alternatively, the handle-mechanism housing bolts 101 (FIG. 4) may be removed, and the housing 81 and the mechanism assembly 34 lifted vertically, so that the latch pin 87 will clear the book 95 on the enclosure door 3.
  • a stationary pin 122 is supported by screws 123 (FIG. 36) to an aperture backing plate 124, the latter secured by the bolts 101 to the enclosure flange 125.
  • the pin 122 passes through the apertures 126 in the two side latch plates 107, as shown in FIG. 15, and pivotally supports the latch pin assembly 127.
  • a torsion spring 128 biases the latch pin assembly 127 in a clockwise direction against the backing plate 124, as viewed in FIG. 26.
  • the side latch plates 107 straddle the handle crank assembly 129.
  • a portion 95a of the door hook 95 moves the latch pin 87 forward to clear the latching surfaces 78a of the crank assembly 129 and to permit the handle mechanism 34 to move upwardly to the closed position.
  • the interlock arm 102 is usually actuated by an operating rod 120 pivoted at 121 to the cam plate 74 and attached to the armature assembly of a magnetic contactor 13 in such a manner that the interlock arm 102 will be raised, when the main contacts 104, 105 and 106 of the contactor 13 are closed. Inthis mode of operation, the mechanical interlock will act to prevent opening or closing the isolating switch 11 under load, or applying load when the isolating switch 11 is not fully open or closed.
  • the various bearings, required by the switch unit are formed by punching, or drilling holes in certain of the sheet steel details resulting in a bearing with short length.
  • a friction-free' mechanism 92 can readily be assembled without special attention being given to the alignment of shafts and bearings.
  • the flared moving contact fingers 36a are made from a resilient material, or a spring-type conducting material, such as beryllium-copper alloy, or, for example, phosphor-bronze, loosely held in the moving contact insulator, as more clearly illustrated in FIG. 9, thereby providing a selfaligning contact feature.
  • FIG.' 32 more clearly illustrates the circuitconnection arrangement of the improved safety, or isolating switch 11 of the present invention in series circuit with the electrically-actuated magnetic contactor 13.
  • a control circuit power supply 22, 23 the circuit line 22 passing through a stop pushbutton 21, which is normally closed, and then through a parallel circuit, comprising a normally-open start button 20, and a parallel contact arrangement, 108 actuated by the opening and closing of the main starter or contactor 13.
  • the circuit 22 then extends through an electrical interlock 60 to the coil 100 of the starter contactor 13 to the other side of the control-circuit power supply 23.
  • fuses 31, 32, 33 may be provided serially in the three circuits 15, 16, .17 of the three-phase circuit, extending from the power source L L L to the load circuit v109, 110, 111 (FIG. 32). Additionally, a plurality of overload relays 25, 26 and 27 may be utilized, one about each of the circuits, so that upon the existence of an overload current for an extended period of time, or in the case of an instantaneous heavy overload current, the overload relays 25,26 and 27 will pick up, and open the normally-closed contacts 65a, 65b and 65c, which are serieswith the coil circuit 100.
  • the mechanism 92 is such that the toggle 71 is in the overcenter position in both the fully-closed position of the switch 11 and also in the fully open-circuit position thereof. This has the important advantage that a dead-center condition of the operating mechanism 92 in both the open and of positions locks the contacts 36 either open or closed to prevent contact operation by the application of shock, vibration, or other external forces to the moving contact assemblies 84. Moreover, precise alignment of the parts is not necessary to eliminate operating friction.
  • An isolating switch comprising, in combination, a relatively stationary contact, a movable contact carrier carrying a movable contact which makes separable engagement with said stationary contact, a rotatable actuating arm pivotally mounted'on a fixed pivot intermediate the ends thereof, one end of said rotatable actuating arm being pivotally connected to said movable contact carrier, and the other end of said rotatable actuating arm carrying one end of a tension spring, the other end of said tension spring connected to said movable contact carrier at a point removed from the pivotal connection of said movable contact carrier to said rotatable actuating arm, whereby rotary movement of said rotatable actuating arm tensions said tension spring and also changes the direction of the biasing force to effect first a rotation of the entire assembly and subsequently an elongation and straightening of the toggle comprising said movable contact carrier and said rotatableactuating arm.”
  • Electrical equipment including an isolating switch and a series-related contactor, said isolating switch comprising, in combination, a relatively stationary contact, a movable contact carrier carrying a movable contact which makes separable engagement with said stationary contact, a rotatable actuating arm pivotally mounted on a fixed pivot intermediate the ends thereof, one end of said rotatable actuating arm being pivotally connected to said movable contact carrier, and the other end of said rotatable actuating arm carrying one end of a tension spring, the other end of said tension spring connected to said movable contact carrier at a point removed from the pivotal connection of said movable contact carrier to said rotatable actuating arm, whereby rotary movement of said rotatable actuating arm tensions said tension spring and also changes the direction of the biasing force to effect first a rotation of the entire assembly and subsequently an elongation and straightening of the toggle comprising said movable contact carrier and said rotatable actuating arm, a cam plate fixedly
  • a switch assembly including a switch cabinet and a hinged door therefor, a switch interrupter having a switch mechanism disposed interiorly within said switch cabinet and having a generally horizontallyarranged switch operating rod (76) horizontally movable generally linearly to effect the opening and closing operations of said switch mechanism, a manuallyoperable handle assembly fixedly mounted to the front of the switch cabinet and rotatable in a generally vertical direction, said handle-assembly including a latching plate (78) movable therewith, said generally horizontally arranged switch operating rod being pivotally connected off-center to said latching plate (78) for interrelating handle motion with the switch mechanism operation, means defining a rotatable latch-pin assembly (107, 87 fixedly mounted to the rear side of the switch cabinet and carrying a rotatable latch pin (87), said hinged door carrying a latch hook cooperating with said rotatable latch pin (87) to effect latching of the door when said latch pin (87 is in its down latching position, biasing means for rotating the rotatable latch pin assembly

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US00317330A 1971-04-28 1972-12-21 Isolating switch with particular toggle and interlock means therefor Expired - Lifetime US3801765A (en)

Priority Applications (5)

Application Number Priority Date Filing Date Title
CA134,672A CA958741A (en) 1971-04-28 1972-02-14 Isolating switch construction and improved mechanism therefor
GB1761572A GB1384586A (en) 1971-04-28 1972-04-17 Isolating switch construction and mechanism therefor
FR7215034A FR2134589B1 (enrdf_load_stackoverflow) 1971-04-28 1972-04-27
JP4229872A JPS489260A (enrdf_load_stackoverflow) 1971-04-28 1972-04-28
US00317330A US3801765A (en) 1971-04-28 1972-12-21 Isolating switch with particular toggle and interlock means therefor

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
US13814371A 1971-04-28 1971-04-28
JP4229872A JPS489260A (enrdf_load_stackoverflow) 1971-04-28 1972-04-28
US00317330A US3801765A (en) 1971-04-28 1972-12-21 Isolating switch with particular toggle and interlock means therefor

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US3801765A true US3801765A (en) 1974-04-02

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Application Number Title Priority Date Filing Date
US00317330A Expired - Lifetime US3801765A (en) 1971-04-28 1972-12-21 Isolating switch with particular toggle and interlock means therefor

Country Status (5)

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US (1) US3801765A (enrdf_load_stackoverflow)
JP (1) JPS489260A (enrdf_load_stackoverflow)
CA (1) CA958741A (enrdf_load_stackoverflow)
FR (1) FR2134589B1 (enrdf_load_stackoverflow)
GB (1) GB1384586A (enrdf_load_stackoverflow)

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2373178A1 (fr) * 1976-12-02 1978-06-30 Gould Inc Mecanisme d'actionnement d'un interrupteur enferme dans une enceinte
US4118607A (en) * 1976-12-02 1978-10-03 I-T-E Imperial Corporation Interlock means for switch enclosure
US4118608A (en) * 1976-12-02 1978-10-03 I-T-E Imperial Corporation Trip indicator
US4153828A (en) * 1976-07-08 1979-05-08 General Electric Company Stored-energy operating means for an electric circuit breaker
US4677269A (en) * 1985-07-12 1987-06-30 Square D Company Isolation switch having a locking bail arm
US4766270A (en) * 1985-07-12 1988-08-23 Square D Company Limited force interlock mechanism
US5424500A (en) * 1994-04-08 1995-06-13 Electro-Mechanical Corporation Door-mounted operating mechanism for electrical switchgear
US6642463B1 (en) * 2002-05-31 2003-11-04 Eaton Corporation Circuit breaker remote actuator with fulcrum member to assist assembly and associated method
WO2015075096A1 (en) * 2013-11-22 2015-05-28 Eaton Industries (Netherlands) B.V. Switching device
US20150145261A1 (en) * 2013-11-22 2015-05-28 Rittal Gmbh & Co. Kg Door lock mechanism for actuation of the locking slide of a disconnector on a control box, and a corresponding control box arrangement
US9252534B2 (en) * 2014-06-20 2016-02-02 Schneider Electric USA, Inc. Swing mount for terminal blocks

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Publication number Priority date Publication date Assignee Title
JPS5343388B2 (enrdf_load_stackoverflow) * 1974-04-01 1978-11-18
JPS5654544U (enrdf_load_stackoverflow) * 1979-10-03 1981-05-13
CZ299378B6 (cs) * 2007-02-13 2008-07-09 Lekov, A. S. Zarízení pro natácení tocny odpojovacího nože
CN108807055B (zh) * 2018-06-28 2023-11-24 厦门宏发汽车电子有限公司 一种开关的触点滑动断开机构及其开关

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US2794881A (en) * 1954-07-22 1957-06-04 Gen Electric Circuit breaker operating mechanism
US2849555A (en) * 1956-10-31 1958-08-26 Westinghouse Electric Corp Operating mechanism for enclosed circuit breakers or switches
US3059072A (en) * 1960-08-17 1962-10-16 Square D Co Dust proof switch enclosure with switch and door interlock
US3122615A (en) * 1960-07-26 1964-02-25 Gen Electric Interlock mechanism for enclosed switching apparatus
US3163725A (en) * 1961-09-01 1964-12-29 Square D Co Electric switch mechanism for selective operation of plural switches
US3229056A (en) * 1962-12-21 1966-01-11 Square D Co Switch enclosure with multiple switch and door interlocks

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GB1022811A (en) * 1962-11-07 1966-03-16 Westinghouse Electric Corp Improvements in or relating to switching apparatus
DE1463660B2 (de) * 1964-12-11 1971-02-18 Sachsenwerk Licht und Kraft AG, 8000 München Elektromagnetischer ausloeser

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Publication number Priority date Publication date Assignee Title
US2794881A (en) * 1954-07-22 1957-06-04 Gen Electric Circuit breaker operating mechanism
US2849555A (en) * 1956-10-31 1958-08-26 Westinghouse Electric Corp Operating mechanism for enclosed circuit breakers or switches
US3122615A (en) * 1960-07-26 1964-02-25 Gen Electric Interlock mechanism for enclosed switching apparatus
US3059072A (en) * 1960-08-17 1962-10-16 Square D Co Dust proof switch enclosure with switch and door interlock
US3163725A (en) * 1961-09-01 1964-12-29 Square D Co Electric switch mechanism for selective operation of plural switches
US3229056A (en) * 1962-12-21 1966-01-11 Square D Co Switch enclosure with multiple switch and door interlocks

Cited By (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4153828A (en) * 1976-07-08 1979-05-08 General Electric Company Stored-energy operating means for an electric circuit breaker
FR2373178A1 (fr) * 1976-12-02 1978-06-30 Gould Inc Mecanisme d'actionnement d'un interrupteur enferme dans une enceinte
US4107488A (en) * 1976-12-02 1978-08-15 Gould Inc. Platform mounted switch operating mechanism
US4118607A (en) * 1976-12-02 1978-10-03 I-T-E Imperial Corporation Interlock means for switch enclosure
US4118608A (en) * 1976-12-02 1978-10-03 I-T-E Imperial Corporation Trip indicator
US4766270A (en) * 1985-07-12 1988-08-23 Square D Company Limited force interlock mechanism
US4677269A (en) * 1985-07-12 1987-06-30 Square D Company Isolation switch having a locking bail arm
US5424500A (en) * 1994-04-08 1995-06-13 Electro-Mechanical Corporation Door-mounted operating mechanism for electrical switchgear
US6642463B1 (en) * 2002-05-31 2003-11-04 Eaton Corporation Circuit breaker remote actuator with fulcrum member to assist assembly and associated method
WO2015075096A1 (en) * 2013-11-22 2015-05-28 Eaton Industries (Netherlands) B.V. Switching device
US20150145261A1 (en) * 2013-11-22 2015-05-28 Rittal Gmbh & Co. Kg Door lock mechanism for actuation of the locking slide of a disconnector on a control box, and a corresponding control box arrangement
CN105765806A (zh) * 2013-11-22 2016-07-13 伊顿工业(荷兰)有限公司 开关设备
US10309127B2 (en) * 2013-11-22 2019-06-04 Rittal Gmbh & Co. Kg Door lock mechanism for actuation of the locking slide of a disconnector on a control box, and a corresponding control box arrangement
US9252534B2 (en) * 2014-06-20 2016-02-02 Schneider Electric USA, Inc. Swing mount for terminal blocks

Also Published As

Publication number Publication date
FR2134589B1 (enrdf_load_stackoverflow) 1978-08-04
CA958741A (en) 1974-12-03
JPS489260A (enrdf_load_stackoverflow) 1973-02-05
FR2134589A1 (enrdf_load_stackoverflow) 1972-12-08
GB1384586A (en) 1975-02-19

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