GB1238428A - - Google Patents

Info

Publication number
GB1238428A
GB1238428A GB1238428DA GB1238428A GB 1238428 A GB1238428 A GB 1238428A GB 1238428D A GB1238428D A GB 1238428DA GB 1238428 A GB1238428 A GB 1238428A
Authority
GB
United Kingdom
Prior art keywords
photo
diode
lamp
key
shift
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
Other languages
English (en)
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 filed Critical
Publication of GB1238428A publication Critical patent/GB1238428A/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

Landscapes

  • Input From Keyboards Or The Like (AREA)
  • Switches Operated By Changes In Physical Conditions (AREA)
GB1238428D 1969-05-02 1970-01-30 Expired GB1238428A (en))

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US82131169A 1969-05-02 1969-05-02

Publications (1)

Publication Number Publication Date
GB1238428A true GB1238428A (en)) 1971-07-07

Family

ID=25233062

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1238428D Expired GB1238428A (en)) 1969-05-02 1970-01-30

Country Status (4)

Country Link
US (1) US3603982A (en))
JP (1) JPS5024569B1 (en))
CA (1) CA923429A (en))
GB (1) GB1238428A (en))

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2597682A1 (fr) * 1986-04-21 1987-10-23 Ferco Int Usine Ferrures Clavier pour appareil electrique.
EP0274725A3 (en) * 1987-01-14 1990-05-16 Telefunken Electronic Gmbh Opto-electronic keyboard
GB2406944A (en) * 2003-10-09 2005-04-13 Motorola Inc Keyboard switching devices

Families Citing this family (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3808363A (en) * 1970-12-23 1974-04-30 Datel Corp Conversational data terminal having a function repeat capability
US3937952A (en) * 1972-09-22 1976-02-10 National Research Development Corporation Keyboard and switches for keyboards
US3856127A (en) * 1972-11-24 1974-12-24 U Halfon Photo-optical keyboard
US3886544A (en) * 1974-06-12 1975-05-27 Leo H Narodny Keyboard using optical switching
US4049964A (en) * 1976-04-01 1977-09-20 Cavitron Corporation Optical switching device
US4417824A (en) * 1982-03-29 1983-11-29 International Business Machines Corporation Optical keyboard with common light transmission members
JPS6014724A (ja) * 1983-07-02 1985-01-25 テー・アー・トリウムフ―アドレル・アクチエンゲゼルシヤフト 光電キ−装置
USRE33422E (en) * 1984-02-02 1990-11-06 Optically activated keyboard for digital system
US4641026A (en) * 1984-02-02 1987-02-03 Texas Instruments Incorporated Optically activated keyboard for digital system
US4634861A (en) * 1984-12-19 1987-01-06 General Instrument Corporation Rotary switch with reflector coded actuator drum
FR2597683B1 (fr) * 1986-04-22 1992-07-31 Battarel Claude Clavier a interrruption de rayonnement.
WO1989001720A1 (en) * 1987-08-21 1989-02-23 Pennwalt Corporation Pyroelectric keyboard
US6705783B1 (en) 2002-10-11 2004-03-16 James H. Bowen Ruggedized keyboard with cursor positioning device
US6853366B2 (en) * 2002-10-11 2005-02-08 James H. Bowen Articulator and optical detection cursor positioning device
US20040190968A1 (en) * 2003-03-25 2004-09-30 Tai-Her Yang Keyboard of multi-point multiple common keys
FR2878062A1 (fr) * 2004-11-18 2006-05-19 Finsecur Sa Procede et dispositif de declenchement manuel
US7446677B2 (en) * 2005-11-14 2008-11-04 Avago Technologies Ecbu Ip Pte Ltd Method and apparatus for optically detecting selections made on an input device

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3017463A (en) * 1959-04-10 1962-01-16 Bendix Corp Keyboard apparatus
NL277886A (en)) * 1961-05-02
US3495239A (en) * 1967-08-15 1970-02-10 Teletype Corp Photoelectric keyboard

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2597682A1 (fr) * 1986-04-21 1987-10-23 Ferco Int Usine Ferrures Clavier pour appareil electrique.
EP0246935A1 (fr) * 1986-04-21 1987-11-25 FERCO INTERNATIONAL Usine de Ferrures de BÀ¢timent Société à responsabilité limitée Clavier pour appareil électrique
EP0274725A3 (en) * 1987-01-14 1990-05-16 Telefunken Electronic Gmbh Opto-electronic keyboard
GB2406944A (en) * 2003-10-09 2005-04-13 Motorola Inc Keyboard switching devices

Also Published As

Publication number Publication date
US3603982A (en) 1971-09-07
CA923429A (en) 1973-03-27
JPS5024569B1 (en)) 1975-08-16

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Legal Events

Date Code Title Description
PS Patent sealed [section 19, patents act 1949]
PLNP Patent lapsed through nonpayment of renewal fees