GB518400A - Improvements in and relating to manually operable electric switches - Google Patents

Improvements in and relating to manually operable electric switches

Info

Publication number
GB518400A
GB518400A GB28107/38A GB2810738A GB518400A GB 518400 A GB518400 A GB 518400A GB 28107/38 A GB28107/38 A GB 28107/38A GB 2810738 A GB2810738 A GB 2810738A GB 518400 A GB518400 A GB 518400A
Authority
GB
United Kingdom
Prior art keywords
spring
projection
secured
operating
blow
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
GB28107/38A
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 GB518400A publication Critical patent/GB518400A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H21/00—Switches operated by an operating part in the form of a pivotable member acted upon directly by a solid body, e.g. by a hand
    • H01H21/02—Details
    • H01H21/18—Movable parts; Contacts mounted thereon
    • H01H21/36—Driving mechanisms
    • H01H21/40—Driving mechanisms having snap action
    • H01H21/44—Driving mechanisms having snap action produced by flexing blade springs
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H21/00—Switches operated by an operating part in the form of a pivotable member acted upon directly by a solid body, e.g. by a hand
    • H01H21/02—Details
    • H01H21/18—Movable parts; Contacts mounted thereon
    • H01H21/22—Operating parts, e.g. handle
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H9/00—Details of switching devices, not covered by groups H01H1/00 - H01H7/00
    • H01H9/30—Means for extinguishing or preventing arc between current-carrying parts
    • H01H9/44—Means for extinguishing or preventing arc between current-carrying parts using blow-out magnet
    • H01H9/443—Means for extinguishing or preventing arc between current-carrying parts using blow-out magnet using permanent magnets

Landscapes

  • Tumbler Switches (AREA)
  • Arc-Extinguishing Devices That Are Switches (AREA)
  • Push-Button Switches (AREA)

Abstract

518,400. Snap-action switches. BRITISH THOMSON-HOUSTON CO., Ltd. Sept. 27, 1938, No. 28107. Convention date, Sept. 29, 1937. [Class 38 (v)] A manually-operable switch comprises an operating-member 10, Fig. 3, a movable contactmember 21 loosely connected thereto, bearing against a projection 23 thereon, and held thereagainst by a spring 26 between the operating- member and the support 14 to which it is pivoted, and a stationary contact 30 on the support, the arrangement being such that the member 21 is pivotable about the projection 23 against the force applied by the spring to provide a wiping-action between the contacts. The member 21 is provided with a recess 22 to provide a seating for the projection 23; it is loosely connected to the member 10 by a pin 24, the parts being held in position by the engagement of the head thereof with the spring 26. The operating- member 10 has a projection 13 having a recess to accommodate a link 16 which co-operates with a spring 18 to provide a snap-action, the spring is secured in position by a bolt connected by a flexible conductor 28 to the member 21 and of which the nut is formed as a terminal 19. In operation, the member 10 is forcibly moved either way sufficiently to move the member 16, whereupon the movement is completed by the spring 18. The fixed contact 30 is mounted on a block 31 of conducting-material secured to or integral with a strap 32 and formed to accommodate a magnetic blow-out 34. A second projection 43 is formed on the member 10 for use when the fixed contact is above the member 21. A number of such switches may be mounted side by side, the blow-out being in the form of a common bar of magnetized material 34, Fig. 1, secured at each end to an arc-chute member 36 and passing through further arch-chute members 35 between each switch. The arc-chute members 36 and the bar are secured to pole-piece members 37 and the assembly is secured to the insulating base 14 by bolts 39, 40 serving as a common terminal. The blow-out may be dispensed with or replaced by an electromagnetic coil. Specification 423,897, [Group II], is referred to.
GB28107/38A 1937-09-29 1938-09-27 Improvements in and relating to manually operable electric switches Expired GB518400A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US166277A US2153401A (en) 1937-09-29 1937-09-29 Electric switch

Publications (1)

Publication Number Publication Date
GB518400A true GB518400A (en) 1940-02-26

Family

ID=22602584

Family Applications (1)

Application Number Title Priority Date Filing Date
GB28107/38A Expired GB518400A (en) 1937-09-29 1938-09-27 Improvements in and relating to manually operable electric switches

Country Status (2)

Country Link
US (2) US2153402A (en)
GB (1) GB518400A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2246664A (en) * 1990-07-31 1992-02-05 Dewhurst Plc Snap action switch

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2758163A (en) * 1949-01-18 1956-08-07 Mailsort Inc Actuating mechanism for sorting machine
CA671520A (en) * 1959-08-07 1963-10-01 C. Wells Bruce Electrical interlock
US3594526A (en) * 1969-01-17 1971-07-20 Square D Co Electrical contact assembly with permanent magnet blowouts
DE19511878A1 (en) * 1995-03-31 1996-10-02 Eaton Controls Gmbh Electrical push button

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2246664A (en) * 1990-07-31 1992-02-05 Dewhurst Plc Snap action switch
GB2246664B (en) * 1990-07-31 1994-09-21 Dewhurst Plc Snap action switch

Also Published As

Publication number Publication date
US2153401A (en) 1939-04-04
US2153402A (en) 1939-04-04

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