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GB1484634A - Pushbutton switch - Google Patents

Pushbutton switch

Info

Publication number
GB1484634A
GB1484634A GB3638374A GB3638374A GB1484634A GB 1484634 A GB1484634 A GB 1484634A GB 3638374 A GB3638374 A GB 3638374A GB 3638374 A GB3638374 A GB 3638374A GB 1484634 A GB1484634 A GB 1484634A
Authority
GB
United Kingdom
Prior art keywords
over
contact
pushbutton
aperture
finger
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
GB3638374A
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.)
Nortel Networks Ltd
Original Assignee
Northern Telecom 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 Northern Telecom Ltd filed Critical Northern Telecom Ltd
Publication of GB1484634A publication Critical patent/GB1484634A/en
Expired 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
    • H01H13/70—Switches having rectilinearly-movable operating part or parts adapted for pushing or pulling in one direction only, e.g. push-button switch having a plurality of operating members associated with different sets of contacts, e.g. keyboard
    • H01H13/78—Switches having rectilinearly-movable operating part or parts adapted for pushing or pulling in one direction only, e.g. push-button switch having a plurality of operating members associated with different sets of contacts, e.g. keyboard characterised by the contacts or the contact sites
    • H01H13/785—Switches having rectilinearly-movable operating part or parts adapted for pushing or pulling in one direction only, e.g. push-button switch having a plurality of operating members associated with different sets of contacts, e.g. keyboard characterised by the contacts or the contact sites characterised by the material of the contacts, e.g. conductive polymers
    • 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
    • H01H13/70—Switches having rectilinearly-movable operating part or parts adapted for pushing or pulling in one direction only, e.g. push-button switch having a plurality of operating members associated with different sets of contacts, e.g. keyboard
    • H01H13/702—Switches having rectilinearly-movable operating part or parts adapted for pushing or pulling in one direction only, e.g. push-button switch having a plurality of operating members associated with different sets of contacts, e.g. keyboard with contacts carried by or formed from layers in a multilayer structure, e.g. membrane switches
    • 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
    • H01H13/70—Switches having rectilinearly-movable operating part or parts adapted for pushing or pulling in one direction only, e.g. push-button switch having a plurality of operating members associated with different sets of contacts, e.g. keyboard
    • H01H13/702—Switches having rectilinearly-movable operating part or parts adapted for pushing or pulling in one direction only, e.g. push-button switch having a plurality of operating members associated with different sets of contacts, e.g. keyboard with contacts carried by or formed from layers in a multilayer structure, e.g. membrane switches
    • H01H13/703—Switches having rectilinearly-movable operating part or parts adapted for pushing or pulling in one direction only, e.g. push-button switch having a plurality of operating members associated with different sets of contacts, e.g. keyboard with contacts carried by or formed from layers in a multilayer structure, e.g. membrane switches characterised by spacers between contact carrying layers
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H2201/00—Contacts
    • H01H2201/022—Material
    • H01H2201/03—Composite
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H2205/00—Movable contacts
    • H01H2205/032—Several contacts formed in one plate or layer
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H2211/00—Spacers
    • H01H2211/006—Individual areas
    • H01H2211/01—Ink
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H2217/00—Facilitation of operation; Human engineering
    • H01H2217/016—Pressure reduction membrane; Spreader layer
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H2225/00—Switch site location
    • H01H2225/006—Switch site location more then one pole
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H2227/00—Dimensions; Characteristics
    • H01H2227/002—Layer thickness
    • H01H2227/006—Spacer
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H2227/00—Dimensions; Characteristics
    • H01H2227/018—Printed contacts; Metal foil
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H2229/00—Manufacturing
    • H01H2229/008—Die stamping
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H2229/00—Manufacturing
    • H01H2229/016—Selective etching
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H2231/00—Applications
    • H01H2231/022—Telephone handset

Landscapes

  • Push-Button Switches (AREA)

Abstract

1484634 Retractive switches NORTHERN TELECOM Ltd 19 Aug 1974 [20 Aug 1973] 36383/74 Heading H1N A switch comprises a base 20 on which is a conductor pattern 21, an apertured spacer 15, an electrically conductive spring contact plate 10 having at least one contact finger 11 over the aperture, and a flexible elastomeric layer 22 deflection of which deflects finger 11 into contact with conductor pattern 21 with an outward wiping movement. As shown layer 22 may have a boss 23 which may support a pushbutton 25. In a second embodiment, Fig. 5 (not shown) there is a cover (31) over the elastomeric layer supporting a plunger (34) depressible via a compression spring (36) by a pushbutton (35). In a third embodiment, Figs. 7, 8 (not shown), there are a plurality of conductive layers separated by insulating layers, each conductive layer having one contact finger over each aperture, all the contact fingers over each aperture of the different layers being circumferentially spaced so the depression of the pushbutton deflects a plurality of fingers for different circuits.
GB3638374A 1973-08-20 1974-08-19 Pushbutton switch Expired GB1484634A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CA179137 1973-08-20

Publications (1)

Publication Number Publication Date
GB1484634A true GB1484634A (en) 1977-09-01

Family

ID=4097596

Family Applications (1)

Application Number Title Priority Date Filing Date
GB3638374A Expired GB1484634A (en) 1973-08-20 1974-08-19 Pushbutton switch

Country Status (7)

Country Link
JP (1) JPS5072182A (en)
DE (1) DE2439697B2 (en)
ES (1) ES429393A1 (en)
FR (1) FR2241862A1 (en)
GB (1) GB1484634A (en)
IT (1) IT1020025B (en)
SE (1) SE7410595L (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1575069A1 (en) * 2004-02-24 2005-09-14 Research In Motion Limited Handheld electronic device and keyboard having multiple-function keys
US7324091B2 (en) 2004-02-24 2008-01-29 Research In Motion Limited Handheld electronic device and keyboard having multiple-function keys

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CA1034175A (en) * 1975-04-16 1978-07-04 Pak-Jong Chu Multi-contact push-button switch
CA1019374A (en) * 1975-04-16 1977-10-18 Cornelis W. Reedyk Multi-contact push-button switch
JPS5399572U (en) * 1977-01-18 1978-08-11
JPS53133175U (en) * 1977-03-29 1978-10-21
DE3012717A1 (en) * 1980-04-01 1981-10-08 Wilhelm Ruf KG, 8000 München KEYPAD
DK168720B1 (en) * 1993-10-28 1994-05-24 Oticon As Contact device and hearing aid equipment with at least one such device
DE19528574C2 (en) * 1995-08-03 1997-06-05 Siemens Ag Switching device
DE102007027218A1 (en) * 2007-06-13 2008-12-18 Leopold Kostal Gmbh & Co. Kg Electric switch

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1575069A1 (en) * 2004-02-24 2005-09-14 Research In Motion Limited Handheld electronic device and keyboard having multiple-function keys
US7324091B2 (en) 2004-02-24 2008-01-29 Research In Motion Limited Handheld electronic device and keyboard having multiple-function keys
EP1892736A2 (en) * 2004-02-24 2008-02-27 Research In Motion Limited Handheld electronic device and keyboard having multiple function keys
EP1892736A3 (en) * 2004-02-24 2008-05-21 Research In Motion Limited Handheld electronic device and keyboard having multiple function keys
US7773072B2 (en) 2004-02-24 2010-08-10 Research In Motion Limited Handheld electronic device and keyboard having multiple-function keys
US8421754B2 (en) 2004-02-24 2013-04-16 Research In Motion Limited Handheld electronic device and keyboard having multiple-function keys

Also Published As

Publication number Publication date
FR2241862A1 (en) 1975-03-21
JPS5072182A (en) 1975-06-14
SE7410595L (en) 1975-02-21
DE2439697B2 (en) 1977-08-04
DE2439697A1 (en) 1975-03-06
ES429393A1 (en) 1976-08-16
IT1020025B (en) 1977-12-20

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Legal Events

Date Code Title Description
PS Patent sealed
PCNP Patent ceased through non-payment of renewal fee