JPS4814623B1 - - Google Patents

Info

Publication number
JPS4814623B1
JPS4814623B1 JP44098409A JP9840969A JPS4814623B1 JP S4814623 B1 JPS4814623 B1 JP S4814623B1 JP 44098409 A JP44098409 A JP 44098409A JP 9840969 A JP9840969 A JP 9840969A JP S4814623 B1 JPS4814623 B1 JP S4814623B1
Authority
JP
Japan
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.)
Pending
Application number
JP44098409A
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 filed Critical
Publication of JPS4814623B1 publication Critical patent/JPS4814623B1/ja
Pending legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03M—CODING; DECODING; CODE CONVERSION IN GENERAL
    • H03M11/00—Coding in connection with keyboards or like devices, i.e. coding of the position of operated keys
    • H03M11/22—Static coding
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03M—CODING; DECODING; CODE CONVERSION IN GENERAL
    • H03M7/00—Conversion of a code where information is represented by a given sequence or number of digits to a code where the same, similar or subset of information is represented by a different sequence or number of digits

Landscapes

  • Engineering & Computer Science (AREA)
  • Theoretical Computer Science (AREA)
  • Arrangements For Transmission Of Measured Signals (AREA)
  • Electronic Switches (AREA)
  • Input From Keyboards Or The Like (AREA)
  • Push-Button Switches (AREA)
  • Logic Circuits (AREA)
JP44098409A 1969-01-15 1969-12-09 Pending JPS4814623B1 (ja)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US79140669A 1969-01-15 1969-01-15

Publications (1)

Publication Number Publication Date
JPS4814623B1 true JPS4814623B1 (ja) 1973-05-09

Family

ID=25153625

Family Applications (1)

Application Number Title Priority Date Filing Date
JP44098409A Pending JPS4814623B1 (ja) 1969-01-15 1969-12-09

Country Status (6)

Country Link
US (1) US3551616A (ja)
JP (1) JPS4814623B1 (ja)
CA (1) CA922638A (ja)
DE (1) DE2001703A1 (ja)
FR (1) FR2028357A1 (ja)
GB (1) GB1248382A (ja)

Families Citing this family (21)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3693775A (en) * 1970-06-30 1972-09-26 Ibm Actuator for elastic diaphragm switch keyboard
US3684842A (en) * 1970-07-01 1972-08-15 Texas Instruments Inc Pushbutton keyboard switch assembly with improved over center diaphragm contact
US3676615A (en) * 1970-07-13 1972-07-11 Ibm Pushbutton keyboard switch array and associated printed circuit logic cards
US3710137A (en) * 1970-08-06 1973-01-09 A Stephens Control system and method
US3696908A (en) * 1970-11-09 1972-10-10 Sperry Rand Corp Capacitive key
US3721976A (en) * 1971-02-01 1973-03-20 Omron Syst Inc Keyboard coding and interlock system
US3731015A (en) * 1971-05-18 1973-05-01 Universal Technology Control keyboard switch with cantilevered contact and diode matrix array
US3797630A (en) * 1971-07-12 1974-03-19 Alphanumeric Holdings Ltd Keyboard for electronic circuit
US4066850A (en) * 1976-06-04 1978-01-03 Ncr Corporation Keyboard switch assembly having interchangeable cover plate, indicating layer and actuator switch assembly in any operative combination
US4071718A (en) * 1976-10-22 1978-01-31 Bowmar Instrument Corporation Flat keyboard assembly having cover type membrane with protrusions to align switch components
US4274752A (en) * 1979-04-02 1981-06-23 International Business Machines Corporation Keyboard multiple switch assembly
US4293849A (en) * 1979-05-23 1981-10-06 Phillips Petroleum Company Keyboard encoder using priority encoders
GB2064873B (en) * 1979-11-26 1984-09-05 Eventoff Franklin Neal Pressure sensitive electric switch
JPS58189918A (ja) * 1982-04-30 1983-11-05 日本メクトロン株式会社 キ−ボ−ドスイツチ
US4727225A (en) * 1986-07-10 1988-02-23 Illinois Tool Works Inc. Electrical switch for actuating a plurality of circuits
GB9004532D0 (en) * 1990-02-28 1990-04-25 Lucas Ind Plc Switch assembly
US5374796A (en) * 1991-11-27 1994-12-20 Picker International, Inc. Contact sensor with improved sensitivity
US5684279A (en) * 1995-09-12 1997-11-04 Key Tronic Corporation Computer keyboard with improved membrane keyswitch structure having deflection concentration feature
US5900829A (en) * 1996-07-23 1999-05-04 Motorola, Inc. Method of and apparatus for detecting key actuations
WO2004077679A1 (en) * 2003-02-28 2004-09-10 Infineon Technologies Ag Method and apparatus for decoding a key matrix
GB2405247B (en) 2003-08-21 2007-07-25 Hewlett Packard Development Co Position sensing method and position sensing apparatus and its construction

Also Published As

Publication number Publication date
US3551616A (en) 1970-12-29
CA922638A (en) 1973-03-13
FR2028357A1 (ja) 1970-10-09
DE2001703A1 (de) 1970-07-30
GB1248382A (en) 1971-09-29

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