GB686516A - An improvement in automatic electric circuit breakers with time lag thermal release - Google Patents

An improvement in automatic electric circuit breakers with time lag thermal release

Info

Publication number
GB686516A
GB686516A GB16711/51A GB1671151A GB686516A GB 686516 A GB686516 A GB 686516A GB 16711/51 A GB16711/51 A GB 16711/51A GB 1671151 A GB1671151 A GB 1671151A GB 686516 A GB686516 A GB 686516A
Authority
GB
United Kingdom
Prior art keywords
lever
toggle
spring
edge
circuit
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
GB16711/51A
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.)
Landis and Gyr AG
Original Assignee
Landis and Gyr AG
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 Landis and Gyr AG filed Critical Landis and Gyr AG
Publication of GB686516A publication Critical patent/GB686516A/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
    • H01H71/50—Manual reset mechanisms which may be also used for manual release
    • H01H71/505—Latching devices between operating and release mechanism
    • 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
    • H01H71/528—Manual reset mechanisms which may be also used for manual release actuated by lever comprising a toggle or collapsible link between handle and contact arm, e.g. sear pin mechanism

Abstract

686,516. Automatic circuit-breakers. LANDIS & GYR SOC. ANON. July 13, 1951 [July 15, 1950], No. 16711/51. Class 38 (v) In a thermally-released, automatic circuit-breaker one of the "releasing" parts is of metal and the other is of glass so that the frictional resistance between them is low and substantially constant. In Fig. 1, the circuit-breaker contacts 1, 2 are held closed by an overset toggle 7 extending between levers 3 and 8, which are pivoted at 4 and 9 and biased by tension springs 6 and 10, respectively. A bell-crank lever 14 is biased by a spring 15 and has a glass plate 18 abutting a knife-edge 20 on a metal bell-crank lever 13. Under excess-current conditions, a bimetallic strip 12 turns the lever 13 about its pivot until the knife edge 20 slips off the edge 19 of the plate 18. The lever 14 is then turned by the spring 15 so that its arm 14<SP>1</SP> strikes a projection 17 to collapse the toggle 7. The lever 3 is turned about its axis 4 by the spring 6 to open the contacts and at the same time to reset the lever 14 by means of a link 16, so that the knife edge 20 can re-engage the glass plate 18 on the cooling of the bimetallic strip. The relaxing of the pressure on the lever 8 by the toggle 7 enables means (not shown) to move the operating lever 11 to the off position, so that the spring 10 is able to reset the toggle 7, and the circuit is then automatically reset ready for reclosure. In a modification, Fig. 2 (not shown), the lever 14 has a cylindrical glass part which normally abuts a transverse surface on the lever 13.
GB16711/51A 1950-07-15 1951-07-13 An improvement in automatic electric circuit breakers with time lag thermal release Expired GB686516A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CH686516X 1950-07-15

Publications (1)

Publication Number Publication Date
GB686516A true GB686516A (en) 1953-01-28

Family

ID=4528905

Family Applications (1)

Application Number Title Priority Date Filing Date
GB16711/51A Expired GB686516A (en) 1950-07-15 1951-07-13 An improvement in automatic electric circuit breakers with time lag thermal release

Country Status (4)

Country Link
CH (1) CH282518A (en)
FR (1) FR1039715A (en)
GB (1) GB686516A (en)
NL (1) NL155404B (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3249674A1 (en) * 2016-05-24 2017-11-29 Siemens Aktiengesellschaft Latching device and release mechanism

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3249674A1 (en) * 2016-05-24 2017-11-29 Siemens Aktiengesellschaft Latching device and release mechanism
US20170345599A1 (en) * 2016-05-24 2017-11-30 Siemens Aktiengesellschaft Overload release
US10347454B2 (en) 2016-05-24 2019-07-09 Siemens Aktiengesellschaft Overload release

Also Published As

Publication number Publication date
CH282518A (en) 1952-04-30
NL155404B (en)
FR1039715A (en) 1953-10-09

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