GB351221A - Improvements in and relating to electric switches - Google Patents

Improvements in and relating to electric switches

Info

Publication number
GB351221A
GB351221A GB17644/30A GB1764430A GB351221A GB 351221 A GB351221 A GB 351221A GB 17644/30 A GB17644/30 A GB 17644/30A GB 1764430 A GB1764430 A GB 1764430A GB 351221 A GB351221 A GB 351221A
Authority
GB
United Kingdom
Prior art keywords
switch
switches
shaft
teeth
closed
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
GB17644/30A
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.)
British Thomson Houston Co Ltd
Original Assignee
British Thomson Houston 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 British Thomson Houston Co Ltd filed Critical British Thomson Houston Co Ltd
Publication of GB351221A publication Critical patent/GB351221A/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
    • H01H71/44—Automatic release mechanisms with or without manual release having means for introducing a predetermined time delay
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H50/00—Details of electromagnetic relays
    • H01H50/86—Means for introducing a predetermined time delay between the initiation of the switching operation and the opening or closing of the contacts
    • H01H50/88—Mechanical means, e.g. dash-pot

Landscapes

  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Mechanisms For Operating Contacts (AREA)
  • Lock And Its Accessories (AREA)

Abstract

351,221. Electromagnetic switches ; rocking-bar controllers. BRITISH THOMSON-HOUSTON CO., Ltd., Crown House, Aldwych, London.-(Assignees of Goff, R. W. ; 114, North Dean Street, Schenectady, New York, U.S.A.) June 6, 1930, No. 17644. Convention date, June 8, 1929. [Classes 38 (iii) and 38 (v).] Switches 12, 13 controlling armature resistance are closed sequentially by the rotation of a shaft 22 acting through mutilated tooth gearing 51, 511. The teeth of this gearing are so shaped that the switches are locked in their " closed " position or in both their closed and open positions. Upon the operation of a " start pushbutton, a solenoid 10 is energized, lifting its core 18 and immediately closing a main switch 11 which connects the motor to the line. At the same time a spring 41 is compressed so that the shaft 22 rotates slowly under the influence of retarding mechanism 14. Attached to the shaft 22 is a gear member 51, Fig. 6, which gears with teeth 58, 59, 60, on the movable switch member 50 and so closes the switch. In the closed positions a cylindrical part 63 on the element 51 rests between the teeth 58, 60, and at the end of the tooth 59 which is shorter than the others, so that the switch is locked. If the switch is to be locked in its open position as well, additional teeth 70, 71, 72 are added. Any desired number of switches are sequentially operated in this manner by arranging the gear elements 51 of each in their proper positions on the shaft 22.
GB17644/30A 1929-06-08 1930-06-06 Improvements in and relating to electric switches Expired GB351221A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US369324A US1919979A (en) 1929-06-08 1929-06-08 Electric switch

Publications (1)

Publication Number Publication Date
GB351221A true GB351221A (en) 1931-06-25

Family

ID=23454993

Family Applications (1)

Application Number Title Priority Date Filing Date
GB17644/30A Expired GB351221A (en) 1929-06-08 1930-06-06 Improvements in and relating to electric switches

Country Status (3)

Country Link
US (1) US1919979A (en)
FR (1) FR698527A (en)
GB (1) GB351221A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2173044A (en) * 1985-03-29 1986-10-01 Mitsubishi Electric Corp Electromagnetic switch

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2481431A (en) * 1943-08-10 1949-09-06 Ward Leonard Electric Co Shockproof electromagnetic relay
US2551373A (en) * 1947-08-02 1951-05-01 Trumbull Electric Mfg Co Electromagnetically actuated contactor with start and stop and hold-in switches
FR2898212B1 (en) * 2006-03-03 2008-05-16 Socomec Sa Sa AUTOMATED CONTROL MODULE FOR AN ELECTRICAL CUTTING APPARATUS AND AN ELECTRICAL CUTTING APPARATUS EQUIPPED WITH SUCH A CONTROL MODULE
CN108493072B (en) * 2018-03-19 2019-08-02 武汉船用电力推进装置研究所（中国船舶重工集团公司第七一二研究所） A kind of high current frame-type dc circuit breaker short circuit delay tunable arrangement

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2173044A (en) * 1985-03-29 1986-10-01 Mitsubishi Electric Corp Electromagnetic switch

Also Published As

Publication number Publication date
FR698527A (en) 1931-01-31
US1919979A (en) 1933-07-25

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