US2924676A - Electrical switches - Google Patents

Electrical switches Download PDF

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Publication number
US2924676A
US2924676A US689558A US68955857A US2924676A US 2924676 A US2924676 A US 2924676A US 689558 A US689558 A US 689558A US 68955857 A US68955857 A US 68955857A US 2924676 A US2924676 A US 2924676A
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US
United States
Prior art keywords
prongs
circle
contacts
extending
curvature
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 - Lifetime
Application number
US689558A
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English (en)
Inventor
Deakin Stanley Thomas
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.)
Siemens Edison Swan Ltd
Original Assignee
Siemens Edison Swan 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 Siemens Edison Swan Ltd filed Critical Siemens Edison Swan Ltd
Application granted granted Critical
Publication of US2924676A publication Critical patent/US2924676A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R13/00—Details of coupling devices of the kinds covered by groups H01R12/70 or H01R24/00 - H01R33/00
    • H01R13/02—Contact members
    • H01R13/10—Sockets for co-operation with pins or blades
    • H01R13/11—Resilient sockets
    • H01R13/112—Resilient sockets forked sockets having two legs
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H1/00—Contacts
    • H01H1/12—Contacts characterised by the manner in which co-operating contacts engage
    • H01H1/36—Contacts characterised by the manner in which co-operating contacts engage by sliding
    • H01H1/42—Knife-and-clip contacts

Definitions

  • This invention relates to electrical switches wherein a movable switching member is adapted to selectively connect with fixed contacts.
  • Such contacts often comprise a pair of resilient prongs so arranged that when a movable switching member is pushed between them they will press against the member with good electrical connection while at the same time permitting ready disengagement of the member.
  • the present invention provides an electrical switch comprising a plurality of fixed contacts and a movable switching member adapted to selectively connect with one or more of said contacts, said contacts each being formed of sheet metal and comprising a pair of prongs and a tag portion extending from the root ends of the prongs, the prongs being twisted in the same angular direction about parallel longitudinal axes and the laterally extending bends formed by the twisting operations each having varying radii of curvature, the radius of curvature of each prong being greatest at the inner edge i.e. adjacent the line of separation of the prongs and decreasing progressively to the outer edge so that the free ends of the prongs overlie each other and are adapted to resiliently press against opposite sides of the switching member when inserted between them.
  • a single pole double throw switch comprising an insulating body 1 carrying a movable switching member 2 having two alternative positions as shown by full lines 3 and dotted lines 4.
  • Switching member 2 is controlled by a toggle mechanism well known in the art and no further description thereof is deemed necessary.
  • Mounted on the insulating body 1 are two fixed contacts 5 and 6. These contacts are each formed of sheet metal and comprise a pair of prongs 7 and 8 located in the same plane and a tag portion 9 extending from the root end of the prongs at right angles thereto. This tag portion at its "end 10 is bent at right angles to form a lug which is attached to the insulating base member 1.
  • the prongs are twisted about parallel axes extending longitudinally of the prongs so that the lateral bends produced thereby each have a varying radius of curvature the radius of curvature being greatest at the inner edge, i.e. adjacent the line of separation of the prongs.
  • the free ends of the prongs overlie each other and are adapted to resiliently press against opposite sides of the switching member 1 when it is inserted between them. The manufacture of such contacts is described in my US. Patent No. 2,779,011.
  • a rotary switch comprising a plurality of fixed contacts 11 having their tag portions secured to an insulating block 13 and distributed round the periphery of a circle and extending radially thereof with their free ends 12 facing inwardly of the circle.
  • the free ends of the prongs are extended circumferentially of the circle and are swaged or bent at their sides 14 to permit entry of a rotatable switching member 15 pivoted about the centre of said circle.
  • An electrical switch comprising an insulating body, a set of fixed contacts mounted on said body portion and arranged in the same place and a rotatable switch member mounted on a support integral with or secured to said insulating body and adapted to selectively connect with each of said contacts, said contacts each being formed of sheet metal and comprising a tag portion secured to said body and a pair of prongs extending longitudinally from said tag, said prongs being rotated in the same angular direction about their individual longitudinal axes substantially into parallel planes, the root ends of said prongs having opposite bends produced by the rotation thereof, said bends extending about axes of curvature extending laterally and each bend having a varying radius of curvature, the radius of curvature of each bend being greatest along the longitudinal centre line of the contact member and decreasing progressively to the outside thereof.
  • An electrical switch comprising an insulating body, a plurality of fixed contacts mounted on said body, and distributed around a pitch circle and extending radially thereof, said contacts comprising tag portions extending outwardly of the circle and secured to the insulating body and a pair of prongs extending inwardly of the circle, said prongs being rotated in the same angular direction about their individual longitudinal axes into planes which are parallel to each other, the root ends of said prongs having opposite bends produced by the rotation thereof, said bends extending laterally and each bend having a varying radius of curvature, the radius of curvature of each bend being greatest along the longitudinal centre line of the Contact member and decreasing progressively to the outside thereof, and a rotatable arm pivoted about the centre of said circle and arranged on being rotated to lie between the free ends of successive contacts.
  • An electrical switch comprising an insulating body structure, a plurality of fixed contacts mounted on said body structure and distributed around the periphery of a circle and extending radially thereof, and comprising a tag portion extending outwardly of the circle and a pair of prongs extending inwardly of the circle, said prongs being rotated in the same angular direction about their individual longitudinal axes into planes which are parallel to each other, the root ends of said prongs having opposite bends produced by the rotation thereof, said bends extending about axes of curvature extending laterally and each bend having a varying radius of curvature, of said circle and arranged on being rotated to lie b cthe radius of curvature of each bend being greatest tween the free ends of successive contacts.

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  • Push-Button Switches (AREA)
  • Rotary Switch, Piano Key Switch, And Lever Switch (AREA)
US689558A 1956-10-17 1957-10-11 Electrical switches Expired - Lifetime US2924676A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB31619/56A GB840092A (en) 1956-10-17 1956-10-17 Improvements relating to electrical switches and contacts therefor

Publications (1)

Publication Number Publication Date
US2924676A true US2924676A (en) 1960-02-09

Family

ID=10325863

Family Applications (1)

Application Number Title Priority Date Filing Date
US689558A Expired - Lifetime US2924676A (en) 1956-10-17 1957-10-11 Electrical switches

Country Status (4)

Country Link
US (1) US2924676A (enrdf_load_html_response)
BE (1) BE561445A (enrdf_load_html_response)
FR (1) FR1184322A (enrdf_load_html_response)
GB (1) GB840092A (enrdf_load_html_response)

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2186949A (en) * 1935-12-09 1940-01-16 Oak Mfg Co Electric switch
US2779011A (en) * 1954-02-01 1957-01-22 Edison Swan Electric Co Ltd Manufacture of electrical socket contacts

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2186949A (en) * 1935-12-09 1940-01-16 Oak Mfg Co Electric switch
US2779011A (en) * 1954-02-01 1957-01-22 Edison Swan Electric Co Ltd Manufacture of electrical socket contacts

Also Published As

Publication number Publication date
GB840092A (en) 1960-07-06
BE561445A (enrdf_load_html_response) 1957-10-31
FR1184322A (fr) 1959-07-20

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