GB1418318A - Keyboard - Google Patents

Keyboard

Info

Publication number
GB1418318A
GB1418318A GB4396572A GB4396572A GB1418318A GB 1418318 A GB1418318 A GB 1418318A GB 4396572 A GB4396572 A GB 4396572A GB 4396572 A GB4396572 A GB 4396572A GB 1418318 A GB1418318 A GB 1418318A
Authority
GB
United Kingdom
Prior art keywords
light
switch
pipes
prevented
photo
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
GB4396572A
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.)
NAT RES DEV
National Research Development Corp UK
Original Assignee
NAT RES DEV
National Research Development Corp UK
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 NAT RES DEV, National Research Development Corp UK filed Critical NAT RES DEV
Priority to GB4396572A priority Critical patent/GB1418318A/en
Priority to JP48107426A priority patent/JPS4971826A/ja
Priority to US05/537,546 priority patent/US3937952A/en
Publication of GB1418318A publication Critical patent/GB1418318A/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
    • H03K17/968—Switches controlled by moving an element forming part of the switch using opto-electronic devices
    • H03K17/969—Switches controlled by moving an element forming part of the switch using opto-electronic devices 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
    • H03M11/26—Coding in connection with keyboards or like devices, i.e. coding of the position of operated keys using opto-electronic means

Landscapes

  • Engineering & Computer Science (AREA)
  • Theoretical Computer Science (AREA)
  • Input From Keyboards Or The Like (AREA)
  • Switches Operated By Changes In Physical Conditions (AREA)
  • Electronic Switches (AREA)
  • Push-Button Switches (AREA)
GB4396572A 1972-09-22 1972-09-22 Keyboard Expired GB1418318A (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
GB4396572A GB1418318A (en) 1972-09-22 1972-09-22 Keyboard
JP48107426A JPS4971826A (https=) 1972-09-22 1973-09-22
US05/537,546 US3937952A (en) 1972-09-22 1974-12-30 Keyboard and switches for keyboards

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB4396572A GB1418318A (en) 1972-09-22 1972-09-22 Keyboard

Publications (1)

Publication Number Publication Date
GB1418318A true GB1418318A (en) 1975-12-17

Family

ID=10431159

Family Applications (1)

Application Number Title Priority Date Filing Date
GB4396572A Expired GB1418318A (en) 1972-09-22 1972-09-22 Keyboard

Country Status (2)

Country Link
JP (1) JPS4971826A (https=)
GB (1) GB1418318A (https=)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0000857A1 (fr) * 1977-07-08 1979-02-21 Battelle Memorial Institute Dispositif de commande photoélectrique
GB2133137A (en) * 1983-01-07 1984-07-18 Plessey Co Plc Fibre optic light switch
FR2604658A1 (fr) * 1986-10-02 1988-04-08 Alain Souloumiac Clavier a balayage matriciel
GB2246196A (en) * 1989-05-30 1992-01-22 Techniphone Optical interface between a control member and an electric circuit switch
EP0558871A1 (de) * 1992-03-03 1993-09-08 Elma Electronic Ag Taste aufgebaut in Schichten aus Folien

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5976052U (ja) * 1982-11-15 1984-05-23 株式会社サンパツク ストロボ用無接点スイツチ
JPS63201281A (ja) * 1987-02-06 1988-08-19 張　英升 自動車のロツク構造
JP2000132317A (ja) * 1998-10-21 2000-05-12 Sharp Corp エリアセンサ及びエリアセンサを用いた入力装置

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0000857A1 (fr) * 1977-07-08 1979-02-21 Battelle Memorial Institute Dispositif de commande photoélectrique
GB2133137A (en) * 1983-01-07 1984-07-18 Plessey Co Plc Fibre optic light switch
FR2604658A1 (fr) * 1986-10-02 1988-04-08 Alain Souloumiac Clavier a balayage matriciel
GB2246196A (en) * 1989-05-30 1992-01-22 Techniphone Optical interface between a control member and an electric circuit switch
GB2246196B (en) * 1989-05-30 1994-03-09 Techniphone Interface system between a control member such as a push-button and a device for closing and opening an electric circuit
EP0558871A1 (de) * 1992-03-03 1993-09-08 Elma Electronic Ag Taste aufgebaut in Schichten aus Folien

Also Published As

Publication number Publication date
JPS4971826A (https=) 1974-07-11

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Legal Events

Date Code Title Description
PS Patent sealed
PCNP Patent ceased through non-payment of renewal fee