GB1341778A - Keyboard devices - Google Patents

Keyboard devices

Info

Publication number
GB1341778A
GB1341778A GB5560671A GB5560671A GB1341778A GB 1341778 A GB1341778 A GB 1341778A GB 5560671 A GB5560671 A GB 5560671A GB 5560671 A GB5560671 A GB 5560671A GB 1341778 A GB1341778 A GB 1341778A
Authority
GB
United Kingdom
Prior art keywords
transformers
transformer
matrix
windings
key
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
GB5560671A
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.)
Alcatel CIT SA
Nokia Inc
Original Assignee
Compagnie Industrielle de Telecommunication CIT Alcatel SA
Nokia 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 Compagnie Industrielle de Telecommunication CIT Alcatel SA, Nokia Inc filed Critical Compagnie Industrielle de Telecommunication CIT Alcatel SA
Publication of GB1341778A publication Critical patent/GB1341778A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L17/00—Apparatus or local circuits for transmitting or receiving codes wherein each character is represented by the same number of equal-length code elements, e.g. Baudot code
    • H04L17/02—Apparatus or circuits at the transmitting end
    • H04L17/04—Apparatus or circuits at the transmitting end with keyboard co-operating with code-bars
    • G—PHYSICS
    • G06—COMPUTING OR CALCULATING; COUNTING
    • G06C—DIGITAL COMPUTERS IN WHICH ALL THE COMPUTATION IS EFFECTED MECHANICALLY
    • G06C7/00—Input mechanisms
    • G06C7/02—Keyboards
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11C—STATIC STORES
    • G11C17/00—Read-only memories programmable only once; Semi-permanent stores, e.g. manually-replaceable information cards
    • G11C17/02—Read-only memories programmable only once; Semi-permanent stores, e.g. manually-replaceable information cards using magnetic or inductive elements
    • 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

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Physics & Mathematics (AREA)
  • Computer Hardware Design (AREA)
  • Computing Systems (AREA)
  • General Physics & Mathematics (AREA)
  • Theoretical Computer Science (AREA)
  • Input From Keyboards Or The Like (AREA)
  • Push-Button Switches (AREA)
GB5560671A 1970-11-30 1971-11-30 Keyboard devices Expired GB1341778A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7043007A FR2115703A5 (https=) 1970-11-30 1970-11-30

Publications (1)

Publication Number Publication Date
GB1341778A true GB1341778A (en) 1973-12-25

Family

ID=9064951

Family Applications (1)

Application Number Title Priority Date Filing Date
GB5560671A Expired GB1341778A (en) 1970-11-30 1971-11-30 Keyboard devices

Country Status (8)

Country Link
US (1) US3740746A (https=)
BE (1) BE775788A (https=)
DD (1) DD95475A5 (https=)
DE (1) DE2159354A1 (https=)
FR (1) FR2115703A5 (https=)
GB (1) GB1341778A (https=)
IT (1) IT941847B (https=)
NL (1) NL7116354A (https=)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2429605A1 (fr) * 1978-06-28 1980-01-25 Coleco Ind Inc Procede et dispositif de jeu

Families Citing this family (13)

* 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
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
GR74576B (https=) * 1980-06-13 1984-06-29 Securitas Int Prod
US4529967A (en) * 1982-07-15 1985-07-16 Gifft Thomas H Non contacting inductive keyboard
CA2192230A1 (en) * 1996-12-05 1998-06-05 Rich Chen Electromagnetic sensitive switch
US20110142522A1 (en) * 2009-12-11 2011-06-16 Bert Yeh Typing to generate electricity
WO2016138546A2 (en) 2015-02-27 2016-09-01 Azoteq (Pty) Ltd Inductance sensing
DE202017103847U1 (de) * 2017-06-28 2017-07-21 Airbus Operations Gmbh System zur Führung eines Roboters durch eine Passagierflugzeugkabine
US11624633B2 (en) 2017-07-13 2023-04-11 Azoteq Holdings Limited Inductive sensing user interface devices
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
NL250321A (https=) * 1959-04-10
GB919764A (en) * 1960-01-21 1963-02-27 Gen Electric Co Ltd Electric signal translating device
US3644893A (en) * 1967-08-22 1972-02-22 William J Harwood Credit card for information verification systems
US3623080A (en) * 1970-01-02 1971-11-23 Bunker Ramo Self-encoding keyboard employing eddy current shorting

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2429605A1 (fr) * 1978-06-28 1980-01-25 Coleco Ind Inc Procede et dispositif de jeu
US4303398A (en) * 1978-06-28 1981-12-01 Coleco Industries, Inc. Electronic quiz game utilizing cartridges and method employing same

Also Published As

Publication number Publication date
NL7116354A (https=) 1972-06-01
BE775788A (fr) 1972-05-25
FR2115703A5 (https=) 1972-07-07
DE2159354A1 (de) 1972-05-31
IT941847B (it) 1973-03-10
DD95475A5 (https=) 1973-02-05
US3740746A (en) 1973-06-19

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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