US2768262A - Electric cut-out switches - Google Patents

Electric cut-out switches Download PDF

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Publication number
US2768262A
US2768262A US509028A US50902855A US2768262A US 2768262 A US2768262 A US 2768262A US 509028 A US509028 A US 509028A US 50902855 A US50902855 A US 50902855A US 2768262 A US2768262 A US 2768262A
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United States
Prior art keywords
contact
arm
blade
movable
lever
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Expired - Lifetime
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US509028A
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English (en)
Inventor
Allard Georges
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Individual
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Individual
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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H73/00—Protective overload circuit-breaking switches in which excess current opens the contacts by automatic release of mechanical energy stored by previous operation of a hand reset mechanism
    • H01H73/22—Protective overload circuit-breaking switches in which excess current opens the contacts by automatic release of mechanical energy stored by previous operation of a hand reset mechanism having electrothermal release and no other automatic release
    • H01H73/30—Protective overload circuit-breaking switches in which excess current opens the contacts by automatic release of mechanical energy stored by previous operation of a hand reset mechanism having electrothermal release and no other automatic release reset by push-button, pull-knob or slide
    • H01H73/306—Protective overload circuit-breaking switches in which excess current opens the contacts by automatic release of mechanical energy stored by previous operation of a hand reset mechanism having electrothermal release and no other automatic release reset by push-button, pull-knob or slide the push-button supporting pivotally a combined contact-latch lever
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H71/00—Details of the protective switches or relays covered by groups H01H73/00 - H01H83/00
    • H01H71/10—Operating or release mechanisms
    • H01H71/12—Automatic release mechanisms with or without manual release
    • H01H71/46—Automatic release mechanisms with or without manual release having means for operating auxiliary contacts additional to the main contacts

Definitions

  • the present invention relates to an improved electric cut-out switch adapted to break in a very quick and safe manner the circuit in which it is interposed, this breaking action occurring either automatically or under the influence of external control means.
  • a switch of this type is already known which is adapted to operate automatically under the influence, for example, of a predetermined current characteristic and comprises a fixed contact and a movable contact responsive to the action of a resilient force tending to move these contacts away from each other.
  • This switch is remarkable notably in that it comprises a control member such as a push-button, rocking lever or the like, actuated from the outside and acting upon said arm against the aforesaid resilient force through a projection, point, blade or the like about which the arm is adapted to rotate during its contact-making and contact-breaking movements, the lower portion of this member carrying, or being associated with, a catch or the like adapted during the contact-making movement to engage a movable and independent locking member so that the catch of the arm may be either held against motion upon completion of the contact-making movement, due to the rocking of the locking member, or released during the contact-opening movement due to the reverse rocking movement of this locking member which is induced by the rotation of said arm about said catch or the like.
  • a control member such as a push-button, rocking lever or the like
  • the aforesaid locking member consists of an L -shaped lever turned upside down and pivoting about its lower end, a resilient member for example a spring, urging the lever in its locking position against the catch carried by the control member.
  • Figure 1 is a longitudinal vertical section of a cut-out switch shown in its contact-making position
  • Figure 2 is an elevational and part-sectional view of the same device but in its contact-breaking position
  • Figure 3 is a longitudinal section of the device during a contact-breaking movement
  • Figure 4 is a section taken upon the line IV-IV of Fig. 2, and
  • Figure 5 is an isometric view showing the apparatus with the casing removed for the sake of clarity.
  • the switch according to this invention comprises a casing 1 and a base 2 supporting the switch mechanism.
  • the latter comprises a fixed contact 3 and a main movable c0ntact 4 rigid with an arm 5 consisting, for example, of a plurality of resilient blades 5', 5", 5" fastened to each other by a rivet 43.
  • the intermediate blade 5" carries the main movable contact 4 and the upper blade 5' carries an auxiliary movable contact 4' acting as a sparkarrester.
  • This arm 5 is urged by a spring 6 to a contactopening position and adapted to be actuated by a contactmaking member 7, for example of the push-button type.
  • the push-button 7 may be replaced by any other suitable control member, for example a hand-actuated pivoting lever or the like.
  • This button 7 carries a plate 8 rigid therewith and formed with a pair of depending projections or lugs 9 and 10; the projection 9 is surrounded by the spring 6 and the projection 10 is adapted to co-act with a locking member 11.
  • the plate 8 is formed with a knife-edge projection 12 adapted to engage the arm 5, the latter being adapted to pivot about the central projection 12 due to the provision of notches or orifices 13, 14 formed in the blades 5, 5", 5" through which the projections 9 and 10 extend as shown.
  • the lower portion of the projection 10 is formed with a notch 15 and a catch-forming lug 16, adapted to co-act with a corresponding lug 15 and notch 16' formed in a locking member 11 having the shape of an inverted L.
  • This locking member 11 is pivotally mounted through a pin 17 on the base 2 and normally urged to the position of Fig. 1, i. e. in its locked position, by a compression spring 18 bearing with one end against the lower end of the locking member 11 and with its other end against a suitable projection 19 of the base 2.
  • the arm 5 engages with its rear end, i. e. the end opposite to that carrying the movable contacts 4, 4', a movable stop member 20 consisting of a separate blade the lower portion 21 of which engages a notch 22 formed in the base of the apparatus.
  • the stop member 20 adapted to rock relative to the base 2 is normally maintained in the position shown in Fig. 1 by means of a tension spring 23 anchored at one end 24 to the base of the switch and at its other end 25 to the blade 20, this other end 25 being for example of ring shape so as to be hooked in a projection 26 of the blade 20 to urge the latter against the edge 34' of a flange 34.
  • the upper portion of the blade 20 has a notch 27 formed therein which is adapted to be constantly engaged by the rear end of the arm 5, and a curved portion 28 adapted to be depressed by the lower portion 29 of a contact-releasing member projecting from the switch casing and consisting in this example of a push-button 30.
  • the blade 25% is also formed with a bent lug 31 having a heel 32 adapted to be engaged by the upper portion of a bimetallic strip 33 having two sides 33, 33" and responsive for example to any overload characteristics of the circuit or to any other predetermined external characteristic which is to constitute the circuit-breaking factor.
  • the blade or movable stop member 20, instead of being independent, may alsolbe pivotally mounted at its. lower end'Zl' through a suitable pivot pin, by, means of trunnions or the like, engaging,correspondingorifices formed in the base 2. 7
  • a pairofwalls 34, 35 (see Figs. 2 and .4) disposed on either side of the arm 5, i. e. in front of and behind the plane 'of Fig. lyconstitute a kind of channel adapted to guide the arm during thermovements of translation and rotationthereof, so that these. movements take place substantially in a same plane, parallel to these walls. Moreover, these wallsform a contact breaking. chamber and insulate the contacts fromthe other portions of .the device. These. walls may be formed integrally, for ex- .arnple by casting or machining, with the base 2, the lat ter consisting preferably of plasticinsulating material.
  • M736 a flexible conductor connecting the arm 5 to the sider33 of the blade 33, the other side 9 of this blade being electrically connected to the terminal 'or. stud 37.
  • the arm 5 comprises a lateral projection or lug 38 (see Figs; 4 and 5) which may be formed integrally with its central portion and adapted to engage a slit 39 formed in the side wall 34-to prevent the arm 5 from moving in th longitudinal direction.
  • This lug 38 may, as shown in Fig. 5, serve as a means for closing a circuit separate from the main circuit by means of auxiliary contacts 49,
  • orifice '42Gformed in this plate is adapted to be engaged by the lug 3% of the arm 5 so as to carry along the blade '41 in itsvertical movements.
  • the device described hereinabove operates as follows: pAssumingthe apparatus to be in its released or opencontact condition (Pig; 2) the contacts may be'closed by depressing the control push-button 7. During this downward movement the knife-edge 12 of the plate 8 rigid with j the push-button 7 engages the arm 5 and as the latter engages the 'notch'27 in the blade 20 it rotates thereabout until the movable contacts 4, 4T carriedbythe arm 5 engage the'fixed contact 3.
  • '33 may be readily insulated by interposing for example a plateof mica or like material between the upper portion of'blade33 and the heel '32'of the stop member on which it is adapted to act.
  • this switch is particularly safe and efiicient in operation, for if a pressure is exerted on the pushbutton 7 as the release takes place, the arm 5 may still rock about the knife edge 12 and carry along the movable contact 4 to separate it from the fixed contact 3. This rocking movement takes place freely, since the orifices 13, 14 are properly dimensioned to avoid any frictional engagement between the arm and the relevant faces of the two projections h, it) of plate 8.
  • the base may be formed integrally therewith in a single moulding operation.
  • An electric switch the contact breaking action of which-.occurs undertheinfiuence of an external control action comprising a fixed contact and a cooperating movable contact, slidable androtatable lever means carrying at one end said movable contact, movable stop means supporting the other end of said lever means in the on" position, resilient means acting on said lever means to rotate said lever means to the ofi position when said movable stop means is deflected, a manually operable contact making member with projecting pivot means acting on said lever means for moving said movable contact into the on position, projections means carried by said contact making member and locking means cooperating with said projections means for keying said contact making member and said lever means at the end of the rotating closing movement of said lever means said locking means being adapted to be actuated and to release automatically said projection means when said lever means rotates to the off position around said projecting pivot means.
  • An electric switch the contact-breaking action of which occurs under the influence of an external control action comprising a fixed contact and a cooperating movable contact, slidable and rotatable lever means carrying at one end said movable contact, movable stop means supporting the other end of said lever means in the on position, resilient means acting on said lever means to rotate said lever means to the oil position when said movable stop means is deflected, a manually operable contact making member with projecting pivot means acting on said lever means for moving said movable contact into the on position, projections means carried by said contact making member, a cranked arm pivoted at its lower end and acted upon by a resilient means for cooperating with said projection means in the on position and keying said contact making member and said lever means at the end of the rotating closing movement of said lever means said cranked arm being adapted to be actuated and to release automatically said projection means when said lever means rotates to the off position around said projecting pivot means.
  • said cranked arm comprises an upper side adapted to be engaged by said lever means during the movement of rotation thereof which moves the contacts away from each other, so as to cause the pivoting of said cranked arm in the direction ensuring the release of said projec tion means.
  • contact-making member comprises another lug means surrounded by said resilient means acting on said lever means.
  • lever means is independent of the contact-making member and is guided in its movements of translation and rotation by a pair of flanges substantially parallel to said movements.
  • lever means comprises a projection slidably engaging a groove substantially parallel to its direction of translation so as to limit the displacement of said lever means perpendicularly to said direction of translation.
  • stop element consists of a blade adapted to pivot about its lower portion and held in contact-making position by resilient means.
US509028A 1954-05-31 1955-05-17 Electric cut-out switches Expired - Lifetime US2768262A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR1040668X 1954-05-31

Publications (1)

Publication Number Publication Date
US2768262A true US2768262A (en) 1956-10-23

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Application Number Title Priority Date Filing Date
US509028A Expired - Lifetime US2768262A (en) 1954-05-31 1955-05-17 Electric cut-out switches

Country Status (7)

Country Link
US (1) US2768262A (fr)
BE (1) BE538333A (fr)
CH (1) CH325268A (fr)
DE (1) DE1040668B (fr)
FR (1) FR1105604A (fr)
GB (1) GB769657A (fr)
NL (1) NL89986C (fr)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2833888A (en) * 1956-02-18 1958-05-06 Labinal Ets Circuit breakers
US2856487A (en) * 1956-04-28 1958-10-14 Mang Robert Cutout switch
DE1072717B (de) * 1958-02-27 1960-01-07 Ellenberger iS. Poensgen G.m.b.H., Altdorf bei Nürnberg Druckknopfbetätigter Überstromschalter
US2930937A (en) * 1958-01-16 1960-03-29 Rowan Controller Company Circuit protector
US6121868A (en) * 1998-12-24 2000-09-19 Primax Electronics Ltd. Electric switch device which can prevent damage to it and devices connected to it

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1129602B (de) * 1959-10-26 1962-05-17 Ellenberger & Poensgen Druckknopfbetaetigter UEberstromschalter
FR1412354A (fr) * 1960-07-20 1965-10-01 Dispositif de déclenchement pour interrupteurs à fléau mobile et appareils à un ou plusieurs pôles en comportant application
DE2705330C2 (de) * 1977-02-09 1983-10-27 Brown, Boveri & Cie Ag, 6800 Mannheim Elektrischer Schalter, insbesondere Motorschutzschalter

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1034820A (fr) * 1951-03-27 1953-08-03 Appareil interrupteur de courant électrique
US2701829A (en) * 1951-08-03 1955-02-08 Cutler Hammer Inc Manually operable circuit breaker

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1034820A (fr) * 1951-03-27 1953-08-03 Appareil interrupteur de courant électrique
US2701829A (en) * 1951-08-03 1955-02-08 Cutler Hammer Inc Manually operable circuit breaker

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2833888A (en) * 1956-02-18 1958-05-06 Labinal Ets Circuit breakers
US2856487A (en) * 1956-04-28 1958-10-14 Mang Robert Cutout switch
US2930937A (en) * 1958-01-16 1960-03-29 Rowan Controller Company Circuit protector
DE1072717B (de) * 1958-02-27 1960-01-07 Ellenberger iS. Poensgen G.m.b.H., Altdorf bei Nürnberg Druckknopfbetätigter Überstromschalter
US2952757A (en) * 1958-02-27 1960-09-13 Ellenberger & Poensgen Pushbutton-operated overload switch
US6121868A (en) * 1998-12-24 2000-09-19 Primax Electronics Ltd. Electric switch device which can prevent damage to it and devices connected to it

Also Published As

Publication number Publication date
BE538333A (fr) 1955-06-15
FR1105604A (fr) 1955-12-06
NL197596B (fr) 1958-08-15
NL89986C (fr) 1959-01-15
CH325268A (fr) 1957-10-31
GB769657A (en) 1957-03-13
DE1040668B (de) 1958-10-09

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