GB1154291A - Improvements in or relating to a Photoelectric Keyboard - Google Patents

Improvements in or relating to a Photoelectric Keyboard

Info

Publication number
GB1154291A
GB1154291A GB417868A GB417868A GB1154291A GB 1154291 A GB1154291 A GB 1154291A GB 417868 A GB417868 A GB 417868A GB 417868 A GB417868 A GB 417868A GB 1154291 A GB1154291 A GB 1154291A
Authority
GB
United Kingdom
Prior art keywords
photo
key
keyboard
electric
relating
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
GB417868A
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.)
Ex-Cell-O Corp
Original Assignee
Ex-Cell-O Corp
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 Ex-Cell-O Corp filed Critical Ex-Cell-O Corp
Publication of GB1154291A publication Critical patent/GB1154291A/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
    • H03K17/51—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the components used
    • H03K17/78—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the components used using opto-electronic devices, i.e. light-emitting and photoelectric devices electrically- or optically-coupled

Landscapes

  • Electronic Switches (AREA)
  • Input From Keyboards Or The Like (AREA)

Abstract

1,154,291. Photo-electric keyboard. EX-CELL-O CORP. 26 Jan., 1968 [6 Feb., 1967], No. 4178/68. Heading G4H. A photo-electric keyboard includes for each key a coded plate 13 (Fig. 2) moved when the associated key is operated to allow light from a source 10 to pass to selective light transmitting elements, e.g. light fibres, connected to a photoelectric element from which coded electrical output signals are obtained. Each key of the keyboard operates a switch 20 enabling a gate so that the output from the photo-electric element 11 may be read out.
GB417868A 1967-02-06 1968-01-26 Improvements in or relating to a Photoelectric Keyboard Expired GB1154291A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US61417667A 1967-02-06 1967-02-06

Publications (1)

Publication Number Publication Date
GB1154291A true GB1154291A (en) 1969-06-04

Family

ID=24460157

Family Applications (1)

Application Number Title Priority Date Filing Date
GB417868A Expired GB1154291A (en) 1967-02-06 1968-01-26 Improvements in or relating to a Photoelectric Keyboard

Country Status (2)

Country Link
DE (1) DE1537934A1 (en)
GB (1) GB1154291A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0525190A1 (en) * 1990-04-18 1993-02-03 Omron Corporation Multiple connected photoelectric switch device
GB2227345B (en) * 1989-01-13 1993-02-24 Sharp Kk Key input apparatus

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2227345B (en) * 1989-01-13 1993-02-24 Sharp Kk Key input apparatus
EP0525190A1 (en) * 1990-04-18 1993-02-03 Omron Corporation Multiple connected photoelectric switch device
EP0525190A4 (en) * 1990-04-18 1994-02-16 Omron Corporation

Also Published As

Publication number Publication date
DE1537934A1 (en) 1970-03-26

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