GB1248382A - Encoding device - Google Patents

Encoding device

Info

Publication number
GB1248382A
GB1248382A GB573/70A GB57370A GB1248382A GB 1248382 A GB1248382 A GB 1248382A GB 573/70 A GB573/70 A GB 573/70A GB 57370 A GB57370 A GB 57370A GB 1248382 A GB1248382 A GB 1248382A
Authority
GB
United Kingdom
Prior art keywords
conductors
switches
electrical
jan
actuation
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
GB573/70A
Other languages
English (en)
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.)
International Business Machines Corp
Original Assignee
International Business Machines Corp
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 International Business Machines Corp filed Critical International Business Machines Corp
Publication of GB1248382A publication Critical patent/GB1248382A/en
Expired 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)
  • Logic Circuits (AREA)
  • Push-Button Switches (AREA)
  • Arrangements For Transmission Of Measured Signals (AREA)
  • Electronic Switches (AREA)
  • Input From Keyboards Or The Like (AREA)
GB573/70A 1969-01-15 1970-01-06 Encoding device Expired GB1248382A (en)

Applications Claiming Priority (1)

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

Publications (1)

Publication Number Publication Date
GB1248382A true GB1248382A (en) 1971-09-29

Family

ID=25153625

Family Applications (1)

Application Number Title Priority Date Filing Date
GB573/70A Expired GB1248382A (en) 1969-01-15 1970-01-06 Encoding device

Country Status (6)

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

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2122422A (en) * 1982-04-30 1984-01-11 Nippon Mektron Kk Keyboard switch
GB2134322A (en) * 1979-11-26 1984-08-08 Franklin Neal Eventoff Dual switches
GB2405247A (en) * 2003-08-21 2005-02-23 Hewlett Packard Development Co Position sensing method with window of detector elements providing a unique logic output

Families Citing this family (18)

* 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
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

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2134322A (en) * 1979-11-26 1984-08-08 Franklin Neal Eventoff Dual switches
GB2122422A (en) * 1982-04-30 1984-01-11 Nippon Mektron Kk Keyboard switch
GB2405247A (en) * 2003-08-21 2005-02-23 Hewlett Packard Development Co Position sensing method with window of detector elements providing a unique logic output
GB2405247B (en) * 2003-08-21 2007-07-25 Hewlett Packard Development Co Position sensing method and position sensing apparatus and its construction
US8922478B2 (en) 2003-08-21 2014-12-30 Hewlett-Packard Development Company, L.P. Position sensing method and position sensing apparatus and its construction

Also Published As

Publication number Publication date
JPS4814623B1 (de) 1973-05-09
FR2028357A1 (de) 1970-10-09
CA922638A (en) 1973-03-13
DE2001703A1 (de) 1970-07-30
US3551616A (en) 1970-12-29

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