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GB1484631A - Circuit breaker - Google Patents

Circuit breaker

Info

Publication number
GB1484631A
GB1484631A GB36237/74A GB3623774A GB1484631A GB 1484631 A GB1484631 A GB 1484631A GB 36237/74 A GB36237/74 A GB 36237/74A GB 3623774 A GB3623774 A GB 3623774A GB 1484631 A GB1484631 A GB 1484631A
Authority
GB
United Kingdom
Prior art keywords
plunger
circuit
casing
armature
expansion
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
Application number
GB36237/74A
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 US00384985A priority Critical patent/US3849752A/en
Priority to CA203,938A priority patent/CA1010484A/en
Application filed by General Electric Co filed Critical General Electric Co
Priority to GB36237/74A priority patent/GB1484631A/en
Priority to DE2439444A priority patent/DE2439444A1/en
Priority to FR7430739A priority patent/FR2284972A1/en
Publication of GB1484631A publication Critical patent/GB1484631A/en
Expired legal-status Critical Current

Links

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
    • H01H71/12—Automatic release mechanisms with or without manual release
    • H01H71/14—Electrothermal mechanisms
    • H01H71/18—Electrothermal mechanisms with expanding rod, strip, or wire
    • 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
    • H01H73/24—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 lever

Landscapes

  • Breakers (AREA)

Abstract

1484631 Automatic-circuit-breakers GENERAL ELECTRIC CO 16 Aug 1974 36237/74 Heading H1N An automatic circuit-breaker has a thermal tripping element 12 with an expansion plunger 53 in a fixed casing 50 which acts as a current carrying heater. Electrical connections to the casing 50 are made at 59 and at one of a set of alternative tags 60 to 64 (Fig. 2, not shown). The rounded end 55 of the plunger 53 is engaged by a projection 56 of a spring biased latch lever 36 which is also the armature of an electromagnet including a yoke 80 and the casing 50 as the conductor thereof. Expansion of the plunger 53 or attraction of the armature 36 allows a latch 38 to release the circuit-breaker mechanism to open its contacts 30, 32. The plunger may be of plastics material such as polyethylene and the material of the plunger may as shown in Fig. 4 be separated into plug sections 84 separated by eddy current heating discs 86.
GB36237/74A 1973-08-02 1974-08-16 Circuit breaker Expired GB1484631A (en)

Priority Applications (5)

Application Number Priority Date Filing Date Title
US00384985A US3849752A (en) 1973-08-02 1973-08-02 Current responsive actuator
CA203,938A CA1010484A (en) 1973-08-02 1974-07-03 Current responsive thermal expansion switch actuator
GB36237/74A GB1484631A (en) 1973-08-02 1974-08-16 Circuit breaker
DE2439444A DE2439444A1 (en) 1973-08-02 1974-08-16 ELECTRICAL SWITCHING DEVICE WITH A CURRENT CONTROLLED TRIP DEVICE
FR7430739A FR2284972A1 (en) 1973-08-02 1974-09-11 CURRENT SENSITIVE TRIGGER FOR ELECTRIC CIRCUIT BREAKER OR OTHER SIMILAR APPLICATIONS

Applications Claiming Priority (5)

Application Number Priority Date Filing Date Title
US00384985A US3849752A (en) 1973-08-02 1973-08-02 Current responsive actuator
CA203,938A CA1010484A (en) 1973-08-02 1974-07-03 Current responsive thermal expansion switch actuator
GB36237/74A GB1484631A (en) 1973-08-02 1974-08-16 Circuit breaker
DE2439444A DE2439444A1 (en) 1973-08-02 1974-08-16 ELECTRICAL SWITCHING DEVICE WITH A CURRENT CONTROLLED TRIP DEVICE
FR7430739A FR2284972A1 (en) 1973-08-02 1974-09-11 CURRENT SENSITIVE TRIGGER FOR ELECTRIC CIRCUIT BREAKER OR OTHER SIMILAR APPLICATIONS

Publications (1)

Publication Number Publication Date
GB1484631A true GB1484631A (en) 1977-09-01

Family

ID=27508027

Family Applications (1)

Application Number Title Priority Date Filing Date
GB36237/74A Expired GB1484631A (en) 1973-08-02 1974-08-16 Circuit breaker

Country Status (5)

Country Link
US (1) US3849752A (en)
CA (1) CA1010484A (en)
DE (1) DE2439444A1 (en)
FR (1) FR2284972A1 (en)
GB (1) GB1484631A (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2387480B (en) * 2002-04-09 2005-04-13 Microsaic Systems Ltd Micro-engineered self-releasing switch

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1610552A (en) * 1919-12-22 1926-12-14 Westinghouse Electric & Mfg Co Relay
US2559372A (en) * 1948-12-10 1951-07-03 Howard A Rike Thermostatic switch
US3117203A (en) * 1960-05-17 1964-01-07 Gen Electric Circuit protective devices and circuits
US3463008A (en) * 1968-02-07 1969-08-26 Controls Co Of America Thermostat with anticipator remote from ambient temperature sensor

Also Published As

Publication number Publication date
CA1010484A (en) 1977-05-17
US3849752A (en) 1974-11-19
DE2439444A1 (en) 1976-02-26
FR2284972A1 (en) 1976-04-09

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Legal Events

Date Code Title Description
PS Patent sealed [section 19, patents act 1949]
PCNP Patent ceased through non-payment of renewal fee