GB388001A - Improvements in and relating to electric switches - Google Patents

Improvements in and relating to electric switches

Info

Publication number
GB388001A
GB388001A GB1390831A GB1390831A GB388001A GB 388001 A GB388001 A GB 388001A GB 1390831 A GB1390831 A GB 1390831A GB 1390831 A GB1390831 A GB 1390831A GB 388001 A GB388001 A GB 388001A
Authority
GB
United Kingdom
Prior art keywords
armature
strip
volt
voltage failure
latch
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
GB1390831A
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
Application filed by General Electric Co filed Critical General Electric Co
Publication of GB388001A publication Critical patent/GB388001A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H83/00—Protective switches, e.g. circuit-breaking switches, or protective relays operated by abnormal electrical conditions otherwise than solely by excess current
    • H01H83/12—Protective switches, e.g. circuit-breaking switches, or protective relays operated by abnormal electrical conditions otherwise than solely by excess current operated by voltage falling below a predetermined value, e.g. for no-volt protection
    • 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
    • H01H71/44—Automatic release mechanisms with or without manual release having means for introducing a predetermined time delay

Abstract

388,001. Protective cut-out arrangements. INTERNATIONAL GENERAL ELECTRIC CO., Inc., 120, Broadway, New York, U.S.A.-(Assignees of Allgemeine Elektricitõts-Ges.; 2, Friedrich Karl-Ufer, Berlin.) May 11, 1931, No. 13908. Convention date, May 10, 1930. Void [Published under Sect. 91 of the Acts]. [Class 38 (v).] Automatic circuit - breakers.- To prevent a no-volt magnet b releasing its armature a to open a circuit on voltage failure of short duration, the armature is held by a spring-controlled latch c until the latter, after a predetermined time-interval and if the voltage failure persists, is deflected by the cooling of a bimetallic strip e constituting a thermal overload release. In a modified form, Fig. 2 (not shown), the no-volt coil heats a bimetal strip acting as a latch for the armature, or the strip may be heated by a shading-ring.
GB1390831A 1930-05-11 1931-05-11 Improvements in and relating to electric switches Expired GB388001A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE559939T 1930-05-11

Publications (1)

Publication Number Publication Date
GB388001A true GB388001A (en) 1933-02-16

Family

ID=34559055

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1390831A Expired GB388001A (en) 1930-05-11 1931-05-11 Improvements in and relating to electric switches

Country Status (2)

Country Link
DE (1) DE559939C (en)
GB (1) GB388001A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2280940A (en) * 1993-08-10 1995-02-15 Mitsubishi Electric Corp Line to ground fault detection for control system of electromagnetic clutch for a vehicle

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1183585B (en) * 1962-02-03 1964-12-17 Sachsenwerk Licht & Kraft Ag Undervoltage time release

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2280940A (en) * 1993-08-10 1995-02-15 Mitsubishi Electric Corp Line to ground fault detection for control system of electromagnetic clutch for a vehicle
GB2280940B (en) * 1993-08-10 1997-04-16 Mitsubishi Electric Corp An electromagnetic clutch control system for a vehicle

Also Published As

Publication number Publication date
DE559939C (en) 1932-09-26

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