US3684848A - Circuit interrupter spring charging means with toggle type latch - Google Patents

Circuit interrupter spring charging means with toggle type latch Download PDF

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Publication number
US3684848A
US3684848A US106328A US3684848DA US3684848A US 3684848 A US3684848 A US 3684848A US 106328 A US106328 A US 106328A US 3684848D A US3684848D A US 3684848DA US 3684848 A US3684848 A US 3684848A
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US
United States
Prior art keywords
latch
operating shaft
open
spring
closed
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
US106328A
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English (en)
Inventor
Norman Davies
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.)
CBS Corp
Original Assignee
Westinghouse Electric Corp
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
Application filed by Westinghouse Electric Corp filed Critical Westinghouse Electric Corp
Application granted granted Critical
Publication of US3684848A publication Critical patent/US3684848A/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
    • H01H3/22—Power arrangements internal to the switch for operating the driving mechanism
    • H01H3/30—Power arrangements internal to the switch for operating the driving mechanism using spring motor
    • 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

Definitions

  • ABSTRACT [521 "200/153 200/153 185/39
  • a circuit interrupter is provided with a stored energy [51] Int. Cl. "H01; overcemer spring operating means for operating the interrupter between open and closed positions.
  • This invention relates to circuit interrupters and more particularly to circuit interrupters of the type comprising a stored energy overcenter spring operating means for operating the circuit interrupter between open and closed positions.
  • the herein disclosed circuit interrupter comprises a stationary contact structure and a movable contact structure cooperable with the stationary contact structure.
  • An operating shaft is supported for rotation between open and closed positions to move the movable contact structure between open and closed positions.
  • a latch linkage is operatively connected to the operating shaft and a latch structure latches the latch linkage in a closed latched position to thereby latch the operating shaft in the closed position.
  • Drive means is operable from a first position to a second position to move an overcenter spring structure from a springdischarged closed position to a spring-charged closed position, and the latch linkage in the closed latched position operates to maintain the overcenter spring structure in the spring-charged closed position.
  • Release means is operable to move the latch structure to an unlatching position to thereby release the latch linkage whereupon the overcenter spring structure moves to a spring-discharged open position to drive the operating shaft to the open position during which operation the latch linkage moves to an open latched position and the latch structure is automatically reset in a latching position latching the latch linkage in the open latched position to thereby latch the operating shaft in the open position.
  • the drive means is operable from the second position to the first position to move the overcenter spring structure from the spring-discharged open position to a spring charged open position, and the latch linkage in the open latched position operates to maintain the overcenter spring structure in the spring-' charged open position.
  • the release means is operable to move the latch structure to the unlatching position to thereby release the latch linkage whereupon the overcenter spring structure moves to a springdischarged closed position to drive the operating shaft to the closed position during which movement the latch linkage moves to the closed latched position and the latch structure is automatically reset in the latching position latching the latch linkage in the closed latched position to thereby latch the operating shaft in the closed position.
  • the latch linkage comprises a toggle structure that is underset in one direction when the latch linkage is in the closed latched position and underset in the opposite direction when the latch linkage is in the open latched position.
  • FIG. 1 is a side elevational view, with parts broken away, of a circuit interrupter constructed in accordance with the principles of this invention
  • FIG. 2 is a front view of the circuit interrupter illustrated in FIG. 1;
  • FIG. 3 is a sectional view taken line IIIIII of FIG. 2;
  • FIG. 4 is a front view, with parts broken away, illustrating the operating mechanism shown in FIG. 2;
  • FIG. 5 is a sectional view taken generally along the line V-V of FIG. 4, with the parts being shown in the spring discharged closed position;
  • FIG. 6 is a view of certain parts disclosed in FIG. 5 with the parts being shown in the spring-charged closed position;
  • FIG. 7 is a view similar to FIG. 5 with the parts being shown in the spring discharged open position;
  • FIG. 8 is a view similar to FIG. 6 with the parts being shown in the spring-charged open position.
  • FIGS. 1 and 2 there is shown, in FIGS. 1 and 2, a circuit interrupter 7 comprising support means 9 and a circuit-interrupter structure 11 supported on the support means 9.
  • the support means 9 comprises backplate means 13 and a pair of side plate means 15, connected to the backplate means 13.
  • a pair of elongated channel members l7 are supported on the side plate means 15 for supporting the terminals of the circuit interrupter.
  • the circuit-interrupter structure 11 comprises three stationary contacts 21 (FIGS. 2 and 3) supported on three spaced insulating members 23 that are supported on one of the back support channel members 17.
  • a separate movable contact arm 25 is provided to cooperate with each of the stationary contacts 21.
  • Each of the contact arms 25 comprises a pair of spaced contact members (FIG. 2) that comprise contact portions that engage the opposite sides of the associated stationary contact 21 in the closed position of the contacts.
  • Each of the contact arms 25 is supported for pivotal movement on a separate conducting terminal 27 by means of a pivot pin 29.
  • Each of the terminals 27 is supported on an insulating support 31 that is in turn supported on one of the channel support members 17.
  • a terminal plate 33 is connected to the contact 21 and a terminal plate 35 is connected to the terminal 27 to enable connection of the pole unit in an electric circuit.
  • each pole unit an elongated link 37 (FIG. 3) is pivotally connected at one end thereof to the movable contact arm 25 by means of a pivot pin 39 and at the other end thereof to a member 41 by means of a pivot pin 43.
  • Each of the members 41 is an integral part of an generally along the elongated operating shaft 45.
  • the operating shaft 45 is supported on the sideplate means 15 for rotational movement about the elongated axis thereof.
  • the circuit interrupter is shown in full lines in FIG. 3 in the closed position.
  • the three links 37 of the three pole units are moved to move the contact arms 25 to the open position shown in broken lines. Reverse o'r clockwise movement of the operating shaft 45 from the position shown in broken lines operates through the links 37 to move the three contact arms 25 from the open position shown in broken lines to the closed position shown in full lines.
  • An operating mechanism 49 (FIGS. 2, 4 and is provided for operating the operating shaft 45 between the closed and open positions.
  • the operating mechanism 49 comprises drive means 51, an overcenter spring structure 53, a latch linkage 55, a latch structure 57 and a trip device 59.
  • the drive means 51 comprises a drive member 61 supported on the operating shaft 45 for rotational movement relative to the operating shaft 45.
  • the drive member 61 is provided with an opening 63 for receiving a crank rod 65 that can be placed into the opening 63 in order to crank the drive member 61 between the open and closed positions.
  • the overcenter spring structure 53 comprises an elongated rod 67 that extends at one end thereof through an opening 69 in a stationary plate 71 that is connected on the side plate means 15.
  • a pin 73 and washer 75 are supported on the rod 67.
  • An overcenter spring 77 is supported on the rod 67 between the washer 75 and the plate 71.
  • the rod 67 is pivotally connected at the other end thereof to a member 79 by means of a pin 81. As can be understood with reference to FIG. 4, the pin 81 extends out through opposite sides of the member 79.
  • the member 79 is supported on the operating shaft 45 for rotational movement relative to the operating shaft 45.
  • a member 85 is fixedly secured to the operating shaft 45.
  • the member 85 is provided with an extension 87 at one side of the operating shaft and an extension 89 at the other side of the operating shaft 45.
  • the member 85 is also provided with an integral extension or toggle link 91 that serves as one link of a toggle of the latch linkage 55 in a manner to be hereinafter described.
  • the other toggle 1 link is a member 93 that is pivotally connected at one end thereof to the part 91 by means of a pivot pin 95 and at the other end thereof to an elongated link 97 by means of a pivot pin 99.
  • the link 97 is pivotally supported, intermediate the ends thereof, on a stationary support bracket 101 by means of a pin 103.
  • the support bracket 101 is suitably secured to the side plate means 15.
  • the link 97 is provided with a notch 105 at the upper end thereof that engages a roller 107 of a roller latch 109.
  • the roller latch 109 is pivotally supported on the bracket 101 by means of a pin 111.
  • the roller latch 109 is provided with a roller. 113 at the other end thereof that engages in a notch 115 of a latch member 117 that is pivotally supported on the bracket 101 by means of a pivot pin 119.
  • a torsion spring 121 biases the roller latch 109 in a clockwise direction to the latching position seen in FIG. 5, and a torsion spring 123 biases the latch 117 in a counterclockwise direction to the latching position seen in FIG. 5.
  • the latch 117 is provided with an extension 127 that can be manually moved to pivot the latch 117 in a clockwise direction in order to operate the interrupter in a I manner to be hereinafter described.
  • the extension 127 may also be actuated by-the electromagnetic trip 59 that comprises a plunger 129 that is raised when the electromagnet 59 is energized to thereby automatically move the latch 117 in a clockwise (FIG. 5) direction to the actuated position.
  • the circuit interrupter is shown in the springdischarged closed position in FIGS. 1-5.
  • the crank rod 65 In order to operate the circuit interrupter to the open position, the crank rod 65 is placed in the opening 63 (FIG. 5) of the drive member 61, and the crank rod 65 is manually cranked from the spring-discharged closed position seen in FIG. 5 to the spring-charged closed position seen in FIG. 6.
  • an extended part 131 of the drive member 61 engages the pin 81 (FIGS. 4 and 5) to drive the intermediate member 79 and spring rod 67 from the spring-discharged closed position seen in FIG. 5 to the overcenter spring-charged closed position seen in FIG. 6.
  • the latch 117 moves to release the roller 113 from the notch 115 permitting the roller latch 109 to rotate in a counterclockwise (FIG. 5) direction about the pin 111.
  • This movement permits the roller 107 to move out of the notch permitting the elongated link 97 to pivot in a counterclockwise direction about the pivot pin 103.
  • This movement releases the toggle 91, 93 to release the operating shaft 45 whereupon the charged spring 77 discharges driving the rod 67 from the springcharged closed position seen in FIG. 6 to the springdischarged open position seen in FIG. 7 with the pin 81 (FIGS.
  • the toggle 91, 93 is moved from the collapsed or downward underset position seen in FIG. 6 to the collapsed or upward underset position seen in FIG. 7 during which movement the link 97 is moved first in a counterclockwise direction as the toggle 91, 93 moves to the erected position and then in a clockwise direction as the toggle 91, 93 collapses to the upward underset position seen in FIG. 7.
  • This movement automatically resets the toggle link 97 in the position seen in FIG. 7, and the springs 121, 123 automatically reset the latches 109, 117 respectively in the latching position seen in FIG. 7.
  • the circuit interrupter In order to manually operate the circuit interrupter from the spring-discharged open position seen in FIG. 7 to the spring-discharged closed position seen in FIG. 5, the circuit interrupter is first operated to the springcharged open position seen in FIG. 8. With the circuit interrupter in the position seen in FIG. 7, the crank 65 is moved from the position seen in FIG. 7 to the position seen in FIG. 8. During this movement, the drive member 61 is moved with the projecting portion 133 thereof operating against the pin 81 (FIGS. 7 and 4) to drive the member 79 and the rod 67 from the springdischarged open position seen in FIG. 7 to the springcharged open position seen in FIG. 8.
  • the part 127 of the latch member 117 is lifted, either manually or electromagnetically, to rotate the latch 117 in a counterclockwise direction to release the roller 113 from the notch 115 to release the roller latch member 109 permitting counterclockwise movement of the roller latch member 109.
  • the roller 107 moves out of the notch 105 of the link 97 to permit counterclockwise movement of the link 97.
  • This movement permits the toggle 91, 93 to move from the upward underset position seen in FIG. 7 to thereby permit clockwise movement of the operating shaft 45.
  • the spring 77 discharges moving the rod 67 from the spring-charged open position seen in FIG. 8 to the spring-discharged closed position seen in FIG.
  • a circuit interrupter comprising a stationary contact and a movable contact cooperable with said stationary contact, an operating shaft supported for rotation between open and closed positions to move said movable contact between open and closed positions, a latch linkage operatively connected to said operating shaft and comprising a toggle, a latch structure in a latching position latching said latch linkage in an open latched position to thereby latch said operating shaft in the open position, said toggle being underset in one direction when said latch linkage is in said open latched position, an overcenter spring structure operatively connected to said operating shaft,
  • said drive means being operable from said second position to said first position to move said operating shaft in a second direction opposite said first direction to thereby move said overcenter spring structure from said spring-discharged closed position to a spring-charged closed position
  • said latch linkage in said closed latched position latching said overcenter spring structure in said spring-charged closed position
  • said latch structure being operable from said latching position to said unlatching position to release said latch linkage from said closed latched position, upon release of said latch linkage from said closed latched position said overcenter spring structure moving to said spring-discharged open position driving said operating shaft in said second direction to said open position, upon operation of said operating shaft to the open position said latch linkage moving to said open latched position wherein said toggle is underset in said one direction and said latch structure being automatically reset in said latching position latching said latch linkage in said open latched position to thereby latch said operating shaft in said open position.
  • said toggle comprising a first toggle link movable with said operating shaft, said toggle comprising a second toggle link, an elongated link pivotally supported intermediate its ends, said elongated link being pivotally connected at one end thereof to said second toggle link, said latch structure latching said elongated link at the opposite end thereof, said elongated link being in the same position when said toggle is underset in said one direction and when said toggle is underset in said opposite direction.
  • a circuit interrupter according to claim 2 and said latch structure comprising a pair of latch members in the same latching position when said latch structure latches said latch linkage in said open latched position and when said latch structure latches said latch linkage in said closed latched position.
  • said latch structure comprising a roller latch member pivotally supported intermediate the ends thereof, said roller latch member comprising a first roller at one end thereof engaging said elongated link, said roller latch member comprising a second roller at the opposite end thereof, a latch trip member engaging said second roller to latch said roller latch member to thereby latch said latch linkage in said open latched position and in said closed latched position, said trip latch member being movable to an unlatching position to release said roller latch member to thereby release said latch linkage when said latch linkage is in said open latched position and also when said latch linkage is in said closed latched position.
  • said overcenter spring structure comprising an intermediate member supported on said operating shaft for pivotal movement relative to said operating shaft, an overcenter spring operatively connected to said intermediate member, said drive means comprising a drive member supported on said operating shaft for pivotal movement relative to said operating shaft, said drive member being pivotally movable on said operating shaft in said first direction from a first position to a secondposition to pivot said intermediate member on said operating shaft in said first direction to move said overcenter spring structure from said spring-discharged open position to said spring-charged open position, and said drive member being pivotally movable on said operating shaft in said second direction from said sec ndpositi n to saidfrst osition tcai pivot said interme rate mem r on sat op rating sh in said second direction to move said overcenter spring structure from said spring-discharged closed position to said springcharged closed position.
  • a circuit interrupter according to claim 5, said circuit interrupter being a multi-pole circuit interrupter, a stationary contact for each of said poles, a movable contact for each of said poles, and said operating shaft being operatively connected to simultaneously move all of said movable contacts between the open and closed positions.
  • a circuit interrupter according to claim 6, and said latch structure being in the same position when said latch structure latches said latch linkagein said open latched position and when said latch structure latches said latch linkage in said closed latched position.

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  • Driving Mechanisms And Operating Circuits Of Arc-Extinguishing High-Tension Switches (AREA)
  • Mechanisms For Operating Contacts (AREA)
US106328A 1971-01-14 1971-01-14 Circuit interrupter spring charging means with toggle type latch Expired - Lifetime US3684848A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US10632871A 1971-01-14 1971-01-14

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US3684848A true US3684848A (en) 1972-08-15

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Application Number Title Priority Date Filing Date
US106328A Expired - Lifetime US3684848A (en) 1971-01-14 1971-01-14 Circuit interrupter spring charging means with toggle type latch

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US (1) US3684848A (fr)
AR (1) AR193057A1 (fr)
AU (1) AU456927B2 (fr)
BE (1) BE778029A (fr)
ES (1) ES398346A1 (fr)

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3755639A (en) * 1972-07-13 1973-08-28 Westinghouse Electric Corp Circuit interrupter with contact actuating lever arm adjusting means
US3778567A (en) * 1972-08-04 1973-12-11 Westinghouse Electric Corp Circuit interrupter with interlocking mechanism
US3783208A (en) * 1972-07-17 1974-01-01 Westinghouse Electric Corp Metal-enclosed switchgear with interlock means
US4114005A (en) * 1977-09-01 1978-09-12 Westinghouse Electric Corp. Circuit breaker spring assembly
US4159404A (en) * 1976-01-06 1979-06-26 Westinghouse Electric Corp. Multi-pole high-voltage circuit-interrupter having independent pole tripping with a single common operating mechanism
US4166205A (en) * 1976-12-30 1979-08-28 Westinghouse Electric Corp. Stored energy circuit breaker
US4342280A (en) * 1980-07-30 1982-08-03 Sara Ashworth Bicycle and motor bike warning signal device
FR2509087A1 (fr) * 1981-07-01 1983-01-07 Alsthom Atlantique Dispositif de commande mecanique pour interrupteur electrique
US5224590A (en) * 1991-11-06 1993-07-06 Westinghouse Electric Corp. Circuit interrupter having improved operating mechanism
US5286936A (en) * 1990-10-25 1994-02-15 Fuji Electric Co., Ltd. Circuit breaker driving device
US10937618B2 (en) * 2016-10-25 2021-03-02 Abb Power Grids Switzerland Ag Latching device and an operating mechanism with such a latching device

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3174010A (en) * 1961-06-27 1965-03-16 Westinghouse Electric Corp Circuit breaker utilizing kinetic energy of trip member to initiate opening of intermediate latch
US3235044A (en) * 1963-06-24 1966-02-15 Ite Circuit Breaker Ltd Spring operator manual charging means
US3236967A (en) * 1963-03-15 1966-02-22 Westinghouse Electric Corp Switchgear having manual and motor operated spring charging means
US3496319A (en) * 1966-12-07 1970-02-17 Empire Switchboard Co Inc High current electric switch with arc chute interlocked with movable contact,and spring driving means

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3174010A (en) * 1961-06-27 1965-03-16 Westinghouse Electric Corp Circuit breaker utilizing kinetic energy of trip member to initiate opening of intermediate latch
US3236967A (en) * 1963-03-15 1966-02-22 Westinghouse Electric Corp Switchgear having manual and motor operated spring charging means
US3235044A (en) * 1963-06-24 1966-02-15 Ite Circuit Breaker Ltd Spring operator manual charging means
US3496319A (en) * 1966-12-07 1970-02-17 Empire Switchboard Co Inc High current electric switch with arc chute interlocked with movable contact,and spring driving means

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3755639A (en) * 1972-07-13 1973-08-28 Westinghouse Electric Corp Circuit interrupter with contact actuating lever arm adjusting means
US3783208A (en) * 1972-07-17 1974-01-01 Westinghouse Electric Corp Metal-enclosed switchgear with interlock means
US3778567A (en) * 1972-08-04 1973-12-11 Westinghouse Electric Corp Circuit interrupter with interlocking mechanism
US4159404A (en) * 1976-01-06 1979-06-26 Westinghouse Electric Corp. Multi-pole high-voltage circuit-interrupter having independent pole tripping with a single common operating mechanism
US4166205A (en) * 1976-12-30 1979-08-28 Westinghouse Electric Corp. Stored energy circuit breaker
US4114005A (en) * 1977-09-01 1978-09-12 Westinghouse Electric Corp. Circuit breaker spring assembly
US4342280A (en) * 1980-07-30 1982-08-03 Sara Ashworth Bicycle and motor bike warning signal device
FR2509087A1 (fr) * 1981-07-01 1983-01-07 Alsthom Atlantique Dispositif de commande mecanique pour interrupteur electrique
US5286936A (en) * 1990-10-25 1994-02-15 Fuji Electric Co., Ltd. Circuit breaker driving device
US5224590A (en) * 1991-11-06 1993-07-06 Westinghouse Electric Corp. Circuit interrupter having improved operating mechanism
US10937618B2 (en) * 2016-10-25 2021-03-02 Abb Power Grids Switzerland Ag Latching device and an operating mechanism with such a latching device

Also Published As

Publication number Publication date
AU3785972A (en) 1973-07-19
BE778029A (fr) 1972-07-14
AU456927B2 (en) 1975-01-16
ES398346A1 (es) 1975-05-16
AR193057A1 (es) 1973-03-30

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