GB1315885A - Keyboards - Google Patents

Keyboards

Info

Publication number
GB1315885A
GB1315885A GB4259171A GB4259171A GB1315885A GB 1315885 A GB1315885 A GB 1315885A GB 4259171 A GB4259171 A GB 4259171A GB 4259171 A GB4259171 A GB 4259171A GB 1315885 A GB1315885 A GB 1315885A
Authority
GB
United Kingdom
Prior art keywords
flop
flip
keys
counter
pairs
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
GB4259171A
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.)
HP Inc
Original Assignee
Hewlett Packard Co
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 Hewlett Packard Co filed Critical Hewlett Packard Co
Publication of GB1315885A publication Critical patent/GB1315885A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03K—PULSE TECHNIQUE
    • H03K17/00—Electronic switching or gating, i.e. not by contact-making and –breaking
    • H03K17/94—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the way in which the control signals are generated
    • H03K17/965—Switches controlled by moving an element forming part of the switch
    • H03K17/97—Switches controlled by moving an element forming part of the switch using a magnetic movable element
    • H03K17/972—Switches controlled by moving an element forming part of the switch using a magnetic movable element having a plurality of control members, e.g. keyboard
    • 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
    • H03M11/20—Dynamic coding, i.e. by key scanning

Landscapes

  • Engineering & Computer Science (AREA)
  • Theoretical Computer Science (AREA)
  • Input From Keyboards Or The Like (AREA)
GB4259171A 1970-09-24 1971-09-13 Keyboards Expired GB1315885A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US7494970A 1970-09-24 1970-09-24

Publications (1)

Publication Number Publication Date
GB1315885A true GB1315885A (en) 1973-05-02

Family

ID=22122613

Family Applications (1)

Application Number Title Priority Date Filing Date
GB4259171A Expired GB1315885A (en) 1970-09-24 1971-09-13 Keyboards

Country Status (7)

Country Link
US (1) US3668697A (enExample)
JP (1) JPS5245171B1 (enExample)
CA (1) CA939610A (enExample)
DE (1) DE2146012C3 (enExample)
FR (1) FR2131215A5 (enExample)
GB (1) GB1315885A (enExample)
MY (1) MY7500223A (enExample)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4398180A (en) 1980-06-26 1983-08-09 International Standard Electric Corporation Contactless keyboard

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4117438A (en) * 1977-04-13 1978-09-26 Datanetics Corporation Contactless keyswitch for keyboards
JPS547717Y2 (enExample) * 1978-01-12 1979-04-10
US4300127A (en) * 1978-09-27 1981-11-10 Bernin Victor M Solid state noncontacting keyboard employing a differential transformer element
US4494109A (en) * 1978-09-27 1985-01-15 Bernin Victor M Noncontacting keyboard employing a transformer element
US4283714A (en) * 1979-08-08 1981-08-11 Texas Instruments Incorporated Magnetic keyboard system
US4401986A (en) * 1979-12-26 1983-08-30 Texas Instruments Incorporated Position sensor and system
ATE30131T1 (de) * 1982-04-15 1987-10-15 Alcatel Nv Tastenelement.
DE3836733A1 (de) * 1988-10-28 1990-05-03 Mannesmann Kienzle Gmbh Schaltungsanordnung zur einstellung des ausloesepunktes in einer induktiven tastatur
JP2733300B2 (ja) * 1989-04-28 1998-03-30 松下電器産業株式会社 キー入力装置
WO2021081570A1 (en) 2019-10-22 2021-04-29 Azoteq (Pty) Ltd Electronic device user interface

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2997703A (en) * 1956-08-03 1961-08-22 Clary Corp Keyboard controlled circuitry
US3453598A (en) * 1965-06-03 1969-07-01 Nasco Design Corp Credit card verifier using transformers
DE1549489B2 (de) * 1967-03-18 1972-08-31 Kienzle Apparate Gmbh, 7730 Villingen Vorrichtung zur eingabe alphanumerischer informationen in datenverarbeitungsmaschinen
US3551865A (en) * 1968-08-20 1970-12-29 Transducer Systems Inc Keyboard switch means

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4398180A (en) 1980-06-26 1983-08-09 International Standard Electric Corporation Contactless keyboard

Also Published As

Publication number Publication date
FR2131215A5 (enExample) 1972-11-10
MY7500223A (en) 1975-12-31
DE2146012B2 (de) 1974-07-18
DE2146012A1 (de) 1972-03-30
US3668697A (en) 1972-06-06
CA939610A (en) 1974-01-08
JPS5245171B1 (enExample) 1977-11-14
DE2146012C3 (de) 1975-03-06

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Legal Events

Date Code Title Description
PS Patent sealed [section 19, patents act 1949]
PCNP Patent ceased through non-payment of renewal fee