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EP0303872A3 - Electric switches - Google Patents

Electric switches Download PDF

Info

Publication number
EP0303872A3
EP0303872A3 EP88112316A EP88112316A EP0303872A3 EP 0303872 A3 EP0303872 A3 EP 0303872A3 EP 88112316 A EP88112316 A EP 88112316A EP 88112316 A EP88112316 A EP 88112316A EP 0303872 A3 EP0303872 A3 EP 0303872A3
Authority
EP
European Patent Office
Prior art keywords
contacts
housing
bridging
afforded
separation
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.)
Ceased
Application number
EP88112316A
Other languages
German (de)
French (fr)
Other versions
EP0303872A2 (en
Inventor
Eric Albert Somerfield
Joseph Thomas Morris
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.)
Crabtree Electrical Industries Ltd
Original Assignee
Crabtree Electrical Industries 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 Crabtree Electrical Industries Ltd filed Critical Crabtree Electrical Industries Ltd
Publication of EP0303872A2 publication Critical patent/EP0303872A2/en
Publication of EP0303872A3 publication Critical patent/EP0303872A3/en
Ceased legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H13/00—Switches having rectilinearly-movable operating part or parts adapted for pushing or pulling in one direction only, e.g. push-button switch
    • H01H13/02—Details
    • H01H13/12—Movable parts; Contacts mounted thereon
    • 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
    • H01H1/14—Contacts characterised by the manner in which co-operating contacts engage by abutting
    • H01H1/20—Bridging contacts
    • 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
    • H01H1/14—Contacts characterised by the manner in which co-operating contacts engage by abutting
    • H01H1/24—Contacts characterised by the manner in which co-operating contacts engage by abutting with resilient mounting
    • H01H1/242—Contacts characterised by the manner in which co-operating contacts engage by abutting with resilient mounting the contact forming a part of a coil spring

Landscapes

  • Push-Button Switches (AREA)
  • Switch Cases, Indication, And Locking (AREA)

Abstract

An electric switch comprises a housing (6) of plastics material, provided with an open-topped recess (8). Slots (10) extends through side walls (8a, 8b) of the housing and open into the recess (8), within each of which slots a contact (12) is located, so that the two contacts extend generally towards the centre of the recess (8), with a degree of separation. Located in the housing is a bridging device (16), afforded by a single length of wire coiled to form a resilient part (20), in the form of a helical spring, and a bridging part (18) afforded by a diametrically enlarged end section of the spring. The resilient part (20) has a diameter which is less than the separation between the contacts (12), whilst the bridging part (18) has a diameter greater than said separation.
The resilient part (20) urges the bridging part (18) away from the contacts, and into engagement with an actuator afforded by a cover member (22), the cover member being guided by the housing for linear movement between rest and operative positions. By depressions of the cover member (22) the bridging part (18) will be moved against the action of the resilient part (20) into engagement with the contacts (12), to close the circuit in which the contacts are connected.
EP88112316A 1987-08-19 1988-07-29 Electric switches Ceased EP0303872A3 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB8719610 1987-08-19
GB8719610A GB2209434B (en) 1987-08-19 1987-08-19 Switches

Publications (2)

Publication Number Publication Date
EP0303872A2 EP0303872A2 (en) 1989-02-22
EP0303872A3 true EP0303872A3 (en) 1990-01-17

Family

ID=10622508

Family Applications (1)

Application Number Title Priority Date Filing Date
EP88112316A Ceased EP0303872A3 (en) 1987-08-19 1988-07-29 Electric switches

Country Status (4)

Country Link
EP (1) EP0303872A3 (en)
GB (1) GB2209434B (en)
MY (1) MY103907A (en)
ZA (1) ZA885964B (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10017832C1 (en) * 2000-04-11 2001-10-11 Kronenberg Gmbh H & J Door contact e.g. for elevator door has 2 contact devices with respective pairs of contacts bridged by contact bridges attached to respective door panels
CN109346342B (en) * 2018-10-30 2020-06-12 广州小鹏汽车科技有限公司 Cover opening interlocking switch

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2444552A (en) * 1945-10-09 1948-07-06 Bruno Martinuzzi Push button
US2567421A (en) * 1947-01-30 1951-09-11 Bruno Martinuzzi Push-button switch
US2952754A (en) * 1959-07-13 1960-09-13 Union Carbide Corp Controlled loading electric switch
EP0012279A1 (en) * 1978-12-14 1980-06-25 Siemens Aktiengesellschaft Push-button switch, particularly for keyboards of typewriters and similar devices
FR2474983A1 (en) * 1980-02-04 1981-08-07 Telemecanique Electrique Car seat belt mounted electrical switch - has hollow rectangular housing with laterally offset actuator button having elastically contacting conductor blades

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5535807B2 (en) * 1972-03-09 1980-09-17
US3826884A (en) * 1973-06-25 1974-07-30 Oak Industries Inc Keyboard switch
US3922513A (en) * 1973-07-05 1975-11-25 Texas Instruments Inc Key switch apparatus
US4052580A (en) * 1975-06-03 1977-10-04 Amf Incorporated Momentary contact pushbutton type switch having flexible, mounted housing
US4242546A (en) * 1978-11-06 1980-12-30 International Telephone And Telegraph Corporation Electrical push-button switch
DE3013115C2 (en) * 1980-04-03 1987-08-20 Schoeller & Co Elektrotechnische Fabrik Gmbh & Co, 6000 Frankfurt Electric key switch

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2444552A (en) * 1945-10-09 1948-07-06 Bruno Martinuzzi Push button
US2567421A (en) * 1947-01-30 1951-09-11 Bruno Martinuzzi Push-button switch
US2952754A (en) * 1959-07-13 1960-09-13 Union Carbide Corp Controlled loading electric switch
EP0012279A1 (en) * 1978-12-14 1980-06-25 Siemens Aktiengesellschaft Push-button switch, particularly for keyboards of typewriters and similar devices
FR2474983A1 (en) * 1980-02-04 1981-08-07 Telemecanique Electrique Car seat belt mounted electrical switch - has hollow rectangular housing with laterally offset actuator button having elastically contacting conductor blades

Also Published As

Publication number Publication date
EP0303872A2 (en) 1989-02-22
MY103907A (en) 1993-10-30
ZA885964B (en) 1989-05-30
GB8719610D0 (en) 1987-09-23
GB2209434A (en) 1989-05-10
GB2209434B (en) 1991-11-27

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