CA939610A - Noncontacting keyboard - Google Patents

Noncontacting keyboard

Info

Publication number
CA939610A
CA939610A CA121,855A CA121855A CA939610A CA 939610 A CA939610 A CA 939610A CA 121855 A CA121855 A CA 121855A CA 939610 A CA939610 A CA 939610A
Authority
CA
Canada
Prior art keywords
noncontacting
keyboard
noncontacting keyboard
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
CA121,855A
Other versions
CA121855S (en
Inventor
David S. Cochran
Glenn E. Mcghee
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
Application granted granted Critical
Publication of CA939610A publication Critical patent/CA939610A/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)
CA121,855A 1970-09-24 1971-08-31 Noncontacting keyboard Expired CA939610A (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
CA939610A true CA939610A (en) 1974-01-08

Family

ID=22122613

Family Applications (1)

Application Number Title Priority Date Filing Date
CA121,855A Expired CA939610A (en) 1970-09-24 1971-08-31 Noncontacting keyboard

Country Status (7)

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

Families Citing this family (11)

* 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 (en) * 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
US4398180A (en) * 1980-06-26 1983-08-09 International Standard Electric Corporation Contactless keyboard
DE3373990D1 (en) * 1982-04-15 1987-11-12 Standard Telephon & Radio Ag Key element
DE3836733A1 (en) * 1988-10-28 1990-05-03 Mannesmann Kienzle Gmbh CIRCUIT ARRANGEMENT FOR SETTING THE TRIGGER POINT IN AN INDUCTIVE KEYBOARD
JP2733300B2 (en) * 1989-04-28 1998-03-30 松下電器産業株式会社 Key input device
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 (en) * 1967-03-18 1972-08-31 Kienzle Apparate Gmbh, 7730 Villingen DEVICE FOR ENTERING ALPHANUMERIC INFORMATION IN DATA PROCESSING MACHINERY
US3551865A (en) * 1968-08-20 1970-12-29 Transducer Systems Inc Keyboard switch means

Also Published As

Publication number Publication date
DE2146012C3 (en) 1975-03-06
FR2131215A5 (en) 1972-11-10
DE2146012A1 (en) 1972-03-30
DE2146012B2 (en) 1974-07-18
GB1315885A (en) 1973-05-02
MY7500223A (en) 1975-12-31
US3668697A (en) 1972-06-06
JPS5245171B1 (en) 1977-11-14

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