US3158716A - Electric circuit breaker - Google Patents

Electric circuit breaker Download PDF

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Publication number
US3158716A
US3158716A US210375A US21037562A US3158716A US 3158716 A US3158716 A US 3158716A US 210375 A US210375 A US 210375A US 21037562 A US21037562 A US 21037562A US 3158716 A US3158716 A US 3158716A
Authority
US
United States
Prior art keywords
support
toggle
releasable
contact arm
toggle links
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
US210375A
Other languages
English (en)
Inventor
Leonide P Koval
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 NL295411D priority Critical patent/NL295411A/xx
Priority to BE634383D priority patent/BE634383A/xx
Application filed by General Electric Co filed Critical General Electric Co
Priority to US210375A priority patent/US3158716A/en
Priority claimed from US210641A external-priority patent/US3158717A/en
Priority to GB24523/63A priority patent/GB1040143A/en
Priority to FR941098A priority patent/FR1362927A/fr
Priority to DEG38188A priority patent/DE1293309B/de
Priority to SE7881/63A priority patent/SE306112B/xx
Priority to FR941587A priority patent/FR1363041A/fr
Priority to DK340863AA priority patent/DK106622C/da
Publication of US3158716A publication Critical patent/US3158716A/en
Application granted granted Critical
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
    • H01H71/522—Manual reset mechanisms which may be also used for manual release actuated by lever comprising a cradle-mechanism
    • H01H71/525—Manual reset mechanisms which may be also used for manual release actuated by lever comprising a cradle-mechanism comprising a toggle between cradle and contact arm and mechanism spring acting between handle and toggle knee

Definitions

  • My invention relates to electric circuit breakers, and particularly to electric circuit breakers of the type in cluding a contact arm operated by a pair of toggle links, the toggle links being supported on a releasable support or cradle.
  • such means comprising a portion of the toggle-support or cradle member, adapted to engage the toggle links upon tripping, to maintain the toggle links in partially collapsed condition.
  • a circuit breaker operating mechanism including a support and at least one contact arm pivotally supported on the support.
  • a pair of toggle links are provided for operating the contact arm.
  • One end of the toggle linkage is pivotally supported on the contact arm.
  • the other end of the toggle linkage is pivotally supported on a releasable support or cradle, which is pivotally sup ported on the support at one end and releasably latched with respect to the support at the other end.
  • An operating spring is provided, having one end connected to the knee of the toggle linkage and the other end carried by an arcuately movable handle member.
  • the toggle link connected to the contact arm is provided with an extension which, in the tripped condition, engages a rigidly mounted stop which limits movement of the lower toggle link toward straightened condition.
  • FIGURE 1 is a side elevation view of an electric circuit breaker incorporating the invention, portions of the casing being broken away, the parts being shown in the OFF condition;
  • FIGURE 2 is a side elevation View of the mechanism of FIGURE 1, the parts being shown in the ON condition;
  • FIGURE 3 is a side elevation view of the mechanism of FIGURE 1, the parts being shown in the TRIPPED condition;
  • FIGURE 4 is an end elevation view of a portion of the circuit breaker mechanism, taken generally on the line 4-. of FTGURE 3, and
  • FlGURE 5 is an exploded perspective view of a portion of the mechanism or" the circuit breaker of FIG URE 1.
  • the invention is shown as incorporated in an electric circuit breaker comprising an insulating casing including a base 2 and a cover 3.
  • the casing 1 is generally rectangular and includes three line terminals (not shown) at one end, and three load terminals (not shown) at the other end. Electrical continuity between each pair of corresponding line and load terminals is adapted to be controlled by a pair of contacts including a relatively movable contact 4 and a stationary contact 5 (only one pair shown).
  • Each of the movable contacts 4 is carried by a movable contact support 6, which is pivotally connected to a contact arm 7 by pivot pin 14.
  • the forward end of the contact support 6 has a post 6A extending through the contact arm 7.
  • a compression spring 6A is positioned on post 6A between the support 6 and t e arm 7, and a cotter pin 63 limits movement of the support 6 away from arm 7.
  • the contact support 6 has a flexible connector connected thereto adjacent the pivot pin 14 by suitable means such as by brazing.
  • the contact arm 7 for the center pair of line and load terminals, as illus trated in FIGURE 1, is pivotally supported on pin 8 carried by side plate portions of a stationary frame assembly 9.
  • the contact arm 7 for each pair of line and load terminals is anchored by suitable fastening means 10, to a contact cross-arm ll of reinforced insulating material.
  • a contact cross-arm ll of reinforced insulating material is anchored by suitable fastening means 10, to a contact cross-arm ll of reinforced insulating material.
  • operating mechanisms including a toggle linkage comprising a side-by-side pair of upper toggle links 12, and a pair or" lower toggle links 13.
  • the lower toggle links l3 comprise portions of a singlebifurcated member, as shown particularly in EEGURE 4, and are pivotally connected to oppose depending side portions of the contact arm '7 by the pivot pin 14.
  • the upper toggle links 12 are connected to the lower toggle links 13 by knee pivot pin 15.
  • the upper toggle links 12 are also connected by pivot pin 16 to a releas able support or cradle member 117.
  • the cradle member 17 is pivotally supported at one end of the support frame 9 by pivot pin 18.
  • the cradle member 1? is releasably latched at its other end by a suitable latch member 19.
  • the latch member 19 is adapted to be moved or permitted to move to releasing position by suitable current-responsive means, not shown.
  • the toggle linkage comprising links 12 and 13 is adapted to be operated between collapsed and straightened conditions by means of a manually operable handle member 20, carried by a handle support member 21.
  • the handle support member 21 is generally bifurcated or U-shaped, and is pivotally supported on the sides of the frame member 9 on pivot supports, not shown.
  • Movement of the handle member Ell from the position shown in FIGURE 1 to the position shown in FIGURE 2 moves the operating spring 22 which is connected between the handle support member 21 and the knee pivot pin 15 of the toggle linkage, across the line of centers of pivot pins 15 and 16, and moves the toggle linkage from collapsed position as in FIGURE 1 to straightened position as in FIGURE 2 with a snap action. This also moves the movable contacts 4 to closed circuit position as shown in FIGURE 2.
  • the lower toggle links 13 are each made generally L-shaped, having an extension 13'.
  • the frame member 9 is provided with a pair of rigidly mounted stops or pins 24, each extending inwardly from one side of the frame 9.
  • the stop pins 24 are further sup ported by means of auxiliary support members 24A as shown particularly in FIGURES 4 and 5.
  • Each piece 24A includes a bent-over portion 243 which fits over the lower edge of the frame-side 9. This, together with hole 24C, which fits over the end of pin 8, retains the piece 24A in position.
  • the pin 24 extends through the hole 24D as well as through an aligned hole in the side of the frame 9.
  • the handle In order to reset the mechanism, the handle is moved clockwise as viewed, causing the handle support member 21 to engage the cradle 17, rotating it clockwise until the portion 17 re-engages the latch member 19. The mechanism is then re-set and can be reclosed by moving the handle in counterclockwise direction.
  • the depending side portions of the channel-shaped contact arm 7 are provided with cut-away recesses or notches 7 to afford clearance for the stop pins 24.
  • the pins 24 cannot be made unitary, i.e., part of a single pin going between the sides of frame 9 due to the fact that space must be left for the flexible conductor 6C (see FIGURE 4). Thus there is a tendency for the pins 2 to be tilted from their supported ends under the impact of ends 13' when tripping occurs.
  • the reinforcing pieces 24A support the pins 24 at the opposite side of the frame 9 and prevent such tilting.
  • An electric circuit breaker comprising:
  • operating means for operating said movable contact arm between open and closed circuit positions, said operating means comprising a releasable togglesupporting member pivotally supported on said support,
  • latch means normally restraining said releasable toggle-supporting member in latched position and operable in response to predetermined current conditions to release said releasable toggle-supporting member
  • stop means rigidly attached to said support and spaced from said pivotal connection of said toggle links to said contact arm
  • said lower toggle links including means engaging said stop means following release of said releasable means and maintaining said toggle linkage in a partially collapsed position following release of said releasable means.
  • An electric circuit breaker comprising:
  • operating means for operating said movable contact arm between open and closed circuit positions, said operating means comprising a releasable togglesupporting member pivotally supported on said support,
  • latch means normally restraining said releasable toggle-supporting member in latched position and operable in response to predetermined current conditions to release said releasable toggle-supporting member
  • stop means rigidly attached to said support between said pivot of said contact arm on said support and said pivotal connection of said toggle links and said contact arm
  • said lower toggle links including means engaging said stop means following release of said releasable means and maintaining said toggle linkage in a partially collapsed position following release of said releasable means.
  • An electric circuit breaker comprising:
  • operating means for operating said movable contact arm between open and closed circuit positions, said operating means comprising a releasable togglesupporting member pivotally supported on said support,
  • latch means normally restraining said releasable toggle-supporting member in latched position and operable in response to predetermined current conditions to release said releasable toggle-supporting member
  • said toggle links including a first toggle link connected to said contact arm, said first toggle link including an offset portion extending generally at right angles to the remaining portion, and
  • stop means rigidly attached to said support between said pivot of said contact arm on said support and said pivotal connection of said toggle links and said contact arm
  • An electric circuit breaker comprising:
  • said operating means comprising a releasable toggle supporting member pivotally supported on said support,
  • latch means normally restraining said releasable toggle supporting member in latched position and operable in response to predetermined current conditions to release said releasable toggle supporting member
  • said lower toggle link including a portion extending generally at right angles to the remaining portion from said second point generally toward said first point

Landscapes

  • Breakers (AREA)
  • Driving Mechanisms And Operating Circuits Of Arc-Extinguishing High-Tension Switches (AREA)
US210375A 1962-07-17 1962-07-17 Electric circuit breaker Expired - Lifetime US3158716A (en)

Priority Applications (9)

Application Number Priority Date Filing Date Title
NL295411D NL295411A (xx) 1962-07-17
BE634383D BE634383A (xx) 1962-07-17
US210375A US3158716A (en) 1962-07-17 1962-07-17 Electric circuit breaker
GB24523/63A GB1040143A (en) 1962-07-17 1963-06-20 Improvements in electric circuit breakers
FR941098A FR1362927A (fr) 1962-07-17 1963-07-11 Disjoncteur électrique
DEG38188A DE1293309B (de) 1962-07-17 1963-07-15 Kipphebelselbstschalter
SE7881/63A SE306112B (xx) 1962-07-17 1963-07-16
FR941587A FR1363041A (fr) 1962-07-17 1963-07-16 Disjoncteur électrique
DK340863AA DK106622C (da) 1962-07-17 1963-07-17 Elektrisk afbryder.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US210375A US3158716A (en) 1962-07-17 1962-07-17 Electric circuit breaker
US210641A US3158717A (en) 1962-07-18 1962-07-18 Electric circuit breaker including stop means for limiting movement of a toggle linkage

Publications (1)

Publication Number Publication Date
US3158716A true US3158716A (en) 1964-11-24

Family

ID=26905103

Family Applications (1)

Application Number Title Priority Date Filing Date
US210375A Expired - Lifetime US3158716A (en) 1962-07-17 1962-07-17 Electric circuit breaker

Country Status (7)

Country Link
US (1) US3158716A (xx)
BE (1) BE634383A (xx)
DE (1) DE1293309B (xx)
DK (1) DK106622C (xx)
GB (1) GB1040143A (xx)
NL (1) NL295411A (xx)
SE (1) SE306112B (xx)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3239638A (en) * 1964-01-24 1966-03-08 Ite Circuit Breaker Ltd Circuit breaker device including stop means for limiting contact arm movement
US3604875A (en) * 1965-09-20 1971-09-14 Allen Bradley Co Modular electric switch with toggle actuating means
US4081642A (en) * 1974-07-03 1978-03-28 Westinghouse Electric Corporation Switch construction and operating mechanism therefor
US4144427A (en) * 1977-07-20 1979-03-13 Gould Inc. Anti-rebound and contact kicker means for circuit breaker
US4588878A (en) * 1984-11-16 1986-05-13 General Electric Company Molded case circuit breaker with reduced contact mounts
WO1993008584A1 (en) * 1991-10-18 1993-04-29 Square D Company Current limiting circuit breaker

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2195016A (en) * 1937-04-07 1940-03-26 Westinghouse Electric & Mfg Co Circuit breaker
US2455753A (en) * 1944-10-10 1948-12-07 Trumbull Electric Mfg Co Thermal circuit breaker
US2492009A (en) * 1943-12-11 1949-12-20 Westinghouse Electric Corp Resilient stop and position limiting means for circuit interrupters
US3003046A (en) * 1959-10-26 1961-10-03 Fed Pacific Electric Co Circuit breaker

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2294838A (en) * 1941-05-15 1942-09-01 Westinghouse Electric & Mfg Co Circuit breaker
US2692931A (en) * 1951-08-07 1954-10-26 Gen Electric Electric circuit breaker
US2824191A (en) * 1953-02-05 1958-02-18 Fed Electric Prod Co Circuit breakers
US2892054A (en) * 1956-11-30 1959-06-23 Westinghouse Electric Corp Circuit breaker
US2908782A (en) * 1957-04-04 1959-10-13 Gen Electric Circuit breaker

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2195016A (en) * 1937-04-07 1940-03-26 Westinghouse Electric & Mfg Co Circuit breaker
US2492009A (en) * 1943-12-11 1949-12-20 Westinghouse Electric Corp Resilient stop and position limiting means for circuit interrupters
US2455753A (en) * 1944-10-10 1948-12-07 Trumbull Electric Mfg Co Thermal circuit breaker
US3003046A (en) * 1959-10-26 1961-10-03 Fed Pacific Electric Co Circuit breaker

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3239638A (en) * 1964-01-24 1966-03-08 Ite Circuit Breaker Ltd Circuit breaker device including stop means for limiting contact arm movement
US3604875A (en) * 1965-09-20 1971-09-14 Allen Bradley Co Modular electric switch with toggle actuating means
US4081642A (en) * 1974-07-03 1978-03-28 Westinghouse Electric Corporation Switch construction and operating mechanism therefor
US4144427A (en) * 1977-07-20 1979-03-13 Gould Inc. Anti-rebound and contact kicker means for circuit breaker
US4588878A (en) * 1984-11-16 1986-05-13 General Electric Company Molded case circuit breaker with reduced contact mounts
WO1993008584A1 (en) * 1991-10-18 1993-04-29 Square D Company Current limiting circuit breaker
US5278373A (en) * 1991-10-18 1994-01-11 Square D Company Current limiting circuit breaker

Also Published As

Publication number Publication date
BE634383A (xx)
DE1293309B (de) 1969-04-24
NL295411A (xx)
DK106622C (da) 1967-02-27
GB1040143A (en) 1966-08-24
SE306112B (xx) 1968-11-18

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