GB908954A - Improvements in and connected with electric circuit breakers - Google Patents

Improvements in and connected with electric circuit breakers

Info

Publication number
GB908954A
GB908954A GB290260A GB290260A GB908954A GB 908954 A GB908954 A GB 908954A GB 290260 A GB290260 A GB 290260A GB 290260 A GB290260 A GB 290260A GB 908954 A GB908954 A GB 908954A
Authority
GB
United Kingdom
Prior art keywords
circuit
circuitbreaker
breaker
electric circuit
high temperature
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
GB290260A
Inventor
Edward Coleman
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.)
JA Crabtree and Co Ltd
Original Assignee
JA Crabtree and Co Ltd
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 JA Crabtree and Co Ltd filed Critical JA Crabtree and Co Ltd
Priority to GB290260A priority Critical patent/GB908954A/en
Priority to FR848364A priority patent/FR1277022A/en
Publication of GB908954A publication Critical patent/GB908954A/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
    • H01H71/121—Protection of release mechanisms

Landscapes

  • Breakers (AREA)

Abstract

908,954. Automatic circuit-breakers. CRABTREE & CO. Ltd., J. A. Dec. 8, 1960 [Jan. 27, 1960], No. 2902/60. Class 38 (5). The circuit-breaker of Specifications 905,639 and 905,641 is provided with a bimetallic element A which in the event of an unduly high temperature within the casing of the circuitbreaker, trips the circuit-breaker if not already tripped and prevents the resetting of the circuitbreaker whilst the high temperature remains. The element A is welded to the frame 13a of the electromagnetic tripping device and when sufficiently heated holds the catch plate 20 in such a position that the re-latching of a trip lever 24a cannot be effected.
GB290260A 1960-01-27 1960-01-27 Improvements in and connected with electric circuit breakers Expired GB908954A (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
GB290260A GB908954A (en) 1960-01-27 1960-01-27 Improvements in and connected with electric circuit breakers
FR848364A FR1277022A (en) 1960-01-27 1960-12-29 Electrical circuit breakers

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB290260A GB908954A (en) 1960-01-27 1960-01-27 Improvements in and connected with electric circuit breakers

Publications (1)

Publication Number Publication Date
GB908954A true GB908954A (en) 1962-10-24

Family

ID=9748196

Family Applications (1)

Application Number Title Priority Date Filing Date
GB290260A Expired GB908954A (en) 1960-01-27 1960-01-27 Improvements in and connected with electric circuit breakers

Country Status (1)

Country Link
GB (1) GB908954A (en)

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