EP0150600A3 - Membrane switch assembly - Google Patents

Membrane switch assembly Download PDF

Info

Publication number
EP0150600A3
EP0150600A3 EP84308746A EP84308746A EP0150600A3 EP 0150600 A3 EP0150600 A3 EP 0150600A3 EP 84308746 A EP84308746 A EP 84308746A EP 84308746 A EP84308746 A EP 84308746A EP 0150600 A3 EP0150600 A3 EP 0150600A3
Authority
EP
European Patent Office
Prior art keywords
switch
switch contacts
switch assembly
membrane switch
impedance
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.)
Withdrawn
Application number
EP84308746A
Other languages
German (de)
French (fr)
Other versions
EP0150600A2 (en
Inventor
Milan Bures
John Robert Rowlette
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.)
TE Connectivity Corp
Original Assignee
AMP Inc
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 AMP Inc filed Critical AMP Inc
Publication of EP0150600A2 publication Critical patent/EP0150600A2/en
Publication of EP0150600A3 publication Critical patent/EP0150600A3/en
Withdrawn legal-status Critical Current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
    • H01H13/702—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
    • H01H2239/00—Miscellaneous
    • H01H2239/01—Miscellaneous combined with other elements on the same substrate
    • H01H2239/012—Decoding impedances
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H2239/00—Miscellaneous
    • H01H2239/02—Other elements in moving part
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H2239/00—Miscellaneous
    • H01H2239/026—Internal encoding, e.g. validity bit

Landscapes

  • Push-Button Switches (AREA)

Abstract

A membrane switch assembly (10) is comprised of spaced apart layers (12, 16) having corresponding patterns of conductive switch contacts (28, 28′) arranged in series thereon, the layers (12, 16) being separated by spacing means (20) having openings therein. The switch contacts (28, 28′) on each layer are spaced along a single conductive path (24, 24′) so that a regular unit value of impedance means exists between the switch contacts (28, 28′). When the electrical circuit is completed by closing a switch site, the resulting total impedance is essentially equal to the sum of the unit values of the impedance means along the circuit path formed by the closed switch.
EP84308746A 1983-12-22 1984-12-14 Membrane switch assembly Withdrawn EP0150600A3 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US56427883A 1983-12-22 1983-12-22
US564278 1983-12-22

Publications (2)

Publication Number Publication Date
EP0150600A2 EP0150600A2 (en) 1985-08-07
EP0150600A3 true EP0150600A3 (en) 1985-09-18

Family

ID=24253846

Family Applications (1)

Application Number Title Priority Date Filing Date
EP84308746A Withdrawn EP0150600A3 (en) 1983-12-22 1984-12-14 Membrane switch assembly

Country Status (2)

Country Link
EP (1) EP0150600A3 (en)
JP (1) JPS60148019A (en)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2594988B1 (en) * 1986-02-21 1989-11-24 Radiotechnique Ind & Comm APPARATUS FOR ESTABLISHING DATA TRANSFERS WITH A PORTABLE ELECTRONIC CARD
CA1287117C (en) * 1986-06-24 1991-07-30 Tamotsu Takei Control device for cooking apparatus
US4857683A (en) * 1988-12-28 1989-08-15 W. H. Brady Co. Membrane switchcores with key cell contact elements connected together for continuous path testing
US9120030B2 (en) * 2012-10-31 2015-09-01 Leo Paper Bags Manufacturing (1982) Limited Book assembly with slider-activated switch

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3623080A (en) * 1970-01-02 1971-11-23 Bunker Ramo Self-encoding keyboard employing eddy current shorting
GB2095036A (en) * 1981-02-19 1982-09-22 Sharp Kk Membrane keyboards

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5852729A (en) * 1981-09-25 1983-03-29 Seiko Epson Corp Liquid-crystal character display device

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3623080A (en) * 1970-01-02 1971-11-23 Bunker Ramo Self-encoding keyboard employing eddy current shorting
GB2095036A (en) * 1981-02-19 1982-09-22 Sharp Kk Membrane keyboards

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
PATENTS ABSTRACTS OF JAPAN, vol. 7, no. 138 (P-204)[1283], 16th June 1983; & JP-A-58 052 729 (EPUSON K.K.) 29-03-1983 *

Also Published As

Publication number Publication date
JPS60148019A (en) 1985-08-05
EP0150600A2 (en) 1985-08-07

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Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

PUAL Search report despatched

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AK Designated contracting states

Designated state(s): BE DE FR GB IT NL

AK Designated contracting states

Designated state(s): BE DE FR GB IT NL

17P Request for examination filed

Effective date: 19860221

17Q First examination report despatched

Effective date: 19870624

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE APPLICATION HAS BEEN WITHDRAWN

18W Application withdrawn

Withdrawal date: 19871007

RIN1 Information on inventor provided before grant (corrected)

Inventor name: ROWLETTE, JOHN ROBERT

Inventor name: BURES, MILAN