US1677713A - Electric switch - Google Patents

Electric switch Download PDF

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Publication number
US1677713A
US1677713A US112401A US11240126A US1677713A US 1677713 A US1677713 A US 1677713A US 112401 A US112401 A US 112401A US 11240126 A US11240126 A US 11240126A US 1677713 A US1677713 A US 1677713A
Authority
US
United States
Prior art keywords
link
movement
lever
pivot
switch
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
Application number
US112401A
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English (en)
Inventor
Harris D Dunton
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
General Electric Co
Original Assignee
General Electric Co
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Priority to BE342385D priority Critical patent/BE342385A/xx
Application filed by General Electric Co filed Critical General Electric Co
Priority to US112401A priority patent/US1677713A/en
Priority to FR634664D priority patent/FR634664A/fr
Application granted granted Critical
Publication of US1677713A publication Critical patent/US1677713A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • 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
    • H01H71/50—Manual reset mechanisms which may be also used for manual release
    • H01H71/52—Manual reset mechanisms which may be also used for manual release actuated by lever

Definitions

  • My invention relates to improvements in electric switches, such as circuit breakers for interrupting electric circuits on the occurrence ofabnormal circuit conditions, and has for an object to provide an improved circuit breaker which can not be maintained in theV circuit closed position during the existence of predetermined conditions.
  • Fig. 1 1s a side elevation of a circuit breaker embodying my invention and shown in the circuit closed position
  • Figs. 2 and 3 are similar to Fig. 1 except that the circuit ⁇ breaker is shown in the partly open and fully open positions, respectively
  • Fig. 4 illustrates in perspective a part of the circuit breaker mechanism.
  • my invention embodiedin an electric switch which, for the purpose of. illustration, is shown as a single pole carbon break circuit breaker, butI my invention is not limited to a single pole circuit breaker or to a circuit breaker of the type having relatively movable cooperating contacts separable in air.
  • the circuit breaker is shown mounted on a suitable supporting structure such as a base or panel 10 of insulating material.
  • the circuit breaker comprises relatively movable cooperating Y. 'contacts including stationary contacts 11 an 12 having studs 13 and a movable contact or electric current conducting member .such as a resilient brush 14 cooperating with the contacts 11 and 12 to control a circuit through the circuit breaker.
  • the circuit breaker may be provided -with cooperating secondary and tertiary contacts 15 and 16 respectively, to -take the arc wheny the circuit breaker' is opened.
  • I Y l For moving the brushl 14 to the circuit y'closed position, the circuit4 breaker4 is provided with a trip-free operating mechanism embodying my invention.
  • this mecha ⁇ nism comprises an operating member such as a handle lever 17, mounted on a floatingcenter such as the pivot 18 which is Inova-bly 1926. Serial No. 112,401.
  • the movable circuit controlling member 'or brush 14 is suitably secured to a brush carrying member or switch arm 21 which is mounted on a stationary pivot 22 and biased by the strain on the brush and gravity to the circuit open positlon.
  • the slot 24 is so formed that the path' ofmovement relatively to the link of the center of the pivot 18 as,the'link moves from one position to another on the pivot 18, has a variable radius of curvature, which is a maximum when the pivot 18 is in the upper end of the slot 24 as in Figs. 1 and 3, and a minimum when the pivot 18 is in the lower end of the slot as in Fig. 2.
  • the slot 24 may be kidney-shaped, as shown, with a'hump or inwardly extending portion 26, the purpose of which will hereinafter be explained.
  • the link 23 is constructed and arranged for both rotatory and translatory movement relatively to the operating lever 17. In order toprevent suchmovement when the link 23 is in a position relatively to the lever 17 such thatthe effective length of the link is la assignee as this invention.
  • the springl 3l is so connected to the latches 27 and 29 relatively to the respective pivots 32 and 33 thereoil as to exert on the latches torques substantially directly proportional to their finasses.
  • a trip lever For releasing the latching means, and thereby eiecting the opening of the circuit breaker, a trip lever, which, as shown, is
  • the trip lever may be actuated to release the latchl 29, either manually, as by pushing on a knob 36, secured to anarm of the trip lever, or automatically by an electroresponsive device.
  • This device may be operative in response to abnormal conditions on the circuit controlled by the circuit breaker.
  • the weight of the trip lever is so distributed as normally to vtend to turn it counter clockwise against a stop 40 on the switch arm 21.
  • the electroresponsive device is provided with means for varying its range of operation. Thismeans, as illustrated, comprises a calibrating screw 41 which su ports the free end of the arma-v ture 38 and 1s adjustable to control the initial position thereof.
  • the links 19 and the link 23 ilorm a toggle Vwhich, in the closed position oi" the circuit breaker, as shown-1n Fig. 1, is underset, that 1s, the pivot 25 does not cross the line through .the centers-otl the pivots 18 and 2U when the arm 21 is moved to the circuit able means such as a catch 42. mounted on av pivot 43 in the operating lever and arranged to slide over and engage a. projection such as a pin 44 on the arm 21.
  • the length of the toggle 2l-23 may be considered as the sum of the distances between the center of the pivot 25 and the centers of the pivots 18 and 22 respectively.
  • This toggle length varies in accordance with the eil'ective length ot' the link 23 and is greater than the distance between the pivots 18 and 22 when the pivot 18 is in the upper portion of the slot 24.
  • the biasing :torce due to the brush pressure and also to gravity exerts on the link 23 a force which acts through the pivot 25 and tends to rotate the link 23 on the pivot 25, but the rotation is prevented by the latches 27 and 29 while in the latching position.
  • link 23 must iirst be latched to the operating lever 17. To do this, the operating lever is moved counter clockwise from the full line position shown in Fig. 3 to the dot and dash line position. Counter clockwise movement of the catch 42 about its pivot 43 is limited by a stop 48 on the operating lever so that the catch 42 rides clear of the pin 44 as the lever is moved to latching position. In this movement of the lever 17, the'latch 27 slides along the edge 47 of the link 23 under the bias ofthe spring 31 until it pa'sses on to thew lug 28. The latch 29, also under the bias of spring 31 and clear of the trip lever arm 35, engages the tail 30 of the latch 27, as shown by the dot and 'dash lines. The link 23 is now in effect” a rigid arm of the operating lever, which, when moved clockwise ⁇ oversetshthe toggle 21-23 and moves the switch arm 21 into the circuit closing ⁇ position. During the clockwise movement of the lever 17 to close the circuit breaker,
  • a 'movable switch member, an operatino'l member, a link connectin the members, 'said link being slotted andpivoted through the slot to one of the members, the slot being so shaped that'the path of movementofthe link pivot relatively to the link has a variable radius of curvature whereby toper-v mit a change in the distance between the connections of the link to the respective members, and latching means for holding one of said members and said link against relative movement.
  • a pivoted switch arm a pivoted operatinoilever therefor, a link pivoted tothe arm,y
  • said link being slotted and pivoted throu h the slot for movement on the pivot of t e operating lever, the vpath. of movement of the pivot relatively to the link having a variable radius of curvature, whereby to permit a change in the' distance between the linky pivots, and latchii'ig means arranged latching means Jr'or preventing such movement whereby under the bias of the arm when in the other position a change in the length of the toggle. is produced to allow the movement of the larm to the one position upon the release of the latchingv means.
  • a pivoted circuit controlling member biased for movement to the circuit open position, an operating lever ior moving the member to thecircuit closed position, a link connecting the member and the lever, said link being constructed and arranged for rotatory and translatory'movement on the pivot of the lever and being subjected to the bias of the member, latching means arranged on movement of the lever in one direction to engage the link in one position and to hold it and the lever against relative movement, said link and member forming a toggle whose length in the latched position of the link is greater than the distance between the pivots ot the member and the/lever whereby on movement of the operating member in the ⁇ opposite direction the member' is moved to the circuit closed position.
  • a variable length connection between said members comprising a, slotted link pivoted through the slot to one of the members, the slot being constructed and arranged to provide a path .of movement for the link pivot relatigely to the link having a variable radius of curvatnrefwhereby to change.
  • the length of the-connection and Alatching means for holding the link in a position to 4maintain the maximum length of the connection against the bias of theswitch ⁇ member, said link and said switch member vforming a toggle arranged to -be overset on movement of the operating member in a direction to move the switch mem- 1 ber to the other position.
  • a pivoted switch member biased for movement to one position, a pivoted operat- .ing member for moving the switch member to another position, a variable length confor the link pivot relatively to the link having a variable radius of curvature whereby to change the length of the connection, latching means for holding the link in a position to ymaintain the maximum length of the connection against thebias of ,the ⁇ 4switch member, said link and said switchl member forming a toggle arranged to be overset and restrained on movement of the operating member in a direction to move the switch member to the other position, and means for releasing the' latchinfe, ⁇ means whereby under the bias of theswitch member the link is moved to a position-to shorten the length ot' the connection between the members and thereby permit ⁇ the toggle to collapse.
  • a trip-free circuit breaker mechanism comprising a switch i member biased for movement to one position, an operating member mounted for movement on a floating center, and a connection between said members constructed and arranged to have its ell'ective length changed under lthe bias of said switch member.
  • a trip-free circuit breaker mechanism comprising a switch member biased for n'iovement to one position, an operating mem# bei' for moving the switch member to another position mounted for movement on a ⁇ floating' center, and a link for connecting said members constructed and arranged for both rotatory and translatory movement relatively to one of the members whereby lthe effective length of the connection is variable under the bias of the switch member.
  • a trip-free circuit breaker mechanism comprising a switch member biased for movement 'to one position, an operating member for moving the switch member to another position mounted for movement on a floating center, a link for connecting said members constructed and arranged for both rotatory and translatory movement relatively to one of the members whereby the effective length of the connection is variable under the bias of the switch member, and 4latching means Vfor preventing such relative movement whereby the operatingmember 'can be actuated in adirection to move the switch' member to the other position.
  • a trip-free circuit breaker mechanism comprising a switch member biased for movement to one position, anoperating member for moving the switch member to another position mounted for movement on a floating center, a linkl for connecting said members constructed and-arranged for both rotatory and translatory movement relativei ly to one of the members whereby the effective length of theconnection is variable un ⁇ der the bias of the switch member, latching means for preventing such relative movement whereby the operating member canl be actuated in a direction to move the switch member to the other position, and means forv the latching means whereby to perreleasing mit such relative movement.
  • a trip-free circuitbreaker mechanism comprising a switch arm biased for move'- ment tothe circuit open position, an operating lever for moving the arm to the circuit closed position against the bias thereof mounted on a floating pivot, a link connecting said arm and lever and arranged for both 4rotatory and translatory movement relatively to the lever under the bias of the ing lever in the opposite direction, the-mem-l arm, latching means for preventing such relative movement arranged to hold the link in an initial position whereby the lever can be actuated to move the arm tothe circuit closed position, means for effecting movement of the link from its initial position un- 4der the bias vof the arm arranged to release the latching means whereby to permit movement of the arm to the circuit open position, and means controlled by the arm and ai'- ranged during the opening movement thereof tov restore the link to its initial position.
  • a trip-free circuitbreaker mechanism comprising a switch member biased for.
  • Vthe bias of the member latching means arranged on movement of the lever in one direction to engage the link in one position and to hold it and the lever against relative movement, said link and member forming a toggle whereby on movement of the operatber is moved to the circuit closed position, means for holding the member in the circuit closedposition While the latchingmeans is in latching position, and means for releasing 'the bias of the member, movemcntof the link to another position relatively to the lever suoli that the length of the toggle is changed.
  • a pivoted ⁇ .circuit controlling ⁇ member biased for movement to the circuit open position, an operating lever for moving the member to the circuitclosed position, a link connecting the lmember and the lever, said link being constructed and arranged for rotatory and translatory movement on the pivot'of the lever and beingl subjected to the bias of thel member, latching means arranged on movement of the lever in one direction to engage the link in one position and to hold it and the lever against relative llO movement, said link and member forming a ment of the link to another position rela- 10 toggle whereby on movement of the opertively to the' lever such that the length of ating lever in the opposite direction, the the toggle is decreased, and means mountedl member is moved to the circuit closed posion the member and arranged to reset the link tion, means for holding the member in the in its first position during the movement of circuit closed position While the latching the member to the circuit open position. 15 means is in latching position, means for In Witness whereof, I have hereto set my releasing vthe latching means whereby

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US112401A 1926-05-28 1926-05-28 Electric switch Expired - Lifetime US1677713A (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
BE342385D BE342385A (enrdf_load_stackoverflow) 1926-05-28
US112401A US1677713A (en) 1926-05-28 1926-05-28 Electric switch
FR634664D FR634664A (fr) 1926-05-28 1927-05-18 Perfectionnements aux interrupteurs et aux disjoncteurs électriques

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US112401A US1677713A (en) 1926-05-28 1926-05-28 Electric switch

Publications (1)

Publication Number Publication Date
US1677713A true US1677713A (en) 1928-07-17

Family

ID=22343693

Family Applications (1)

Application Number Title Priority Date Filing Date
US112401A Expired - Lifetime US1677713A (en) 1926-05-28 1926-05-28 Electric switch

Country Status (3)

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US (1) US1677713A (enrdf_load_stackoverflow)
BE (1) BE342385A (enrdf_load_stackoverflow)
FR (1) FR634664A (enrdf_load_stackoverflow)

Also Published As

Publication number Publication date
FR634664A (fr) 1928-02-23
BE342385A (enrdf_load_stackoverflow)

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