GB2013333A - Co-ordinate switching systems - Google Patents

Co-ordinate switching systems

Info

Publication number
GB2013333A
GB2013333A GB7902748A GB7902748A GB2013333A GB 2013333 A GB2013333 A GB 2013333A GB 7902748 A GB7902748 A GB 7902748A GB 7902748 A GB7902748 A GB 7902748A GB 2013333 A GB2013333 A GB 2013333A
Authority
GB
United Kingdom
Prior art keywords
tracks
track
pin
switching systems
columns
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.)
Withdrawn
Application number
GB7902748A
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.)
Nederlandsche Apparatenfabriek NEDAP NV
Original Assignee
Nederlandsche Apparatenfabriek NEDAP NV
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 Nederlandsche Apparatenfabriek NEDAP NV filed Critical Nederlandsche Apparatenfabriek NEDAP NV
Publication of GB2013333A publication Critical patent/GB2013333A/en
Withdrawn legal-status Critical Current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

  • Optical Communication System (AREA)
  • Mechanical Light Control Or Optical Switches (AREA)
  • Length Measuring Devices By Optical Means (AREA)
  • Position Input By Displaying (AREA)

Abstract

The system comprises a member 1 in which light transmission tracks extends along a number of rows 3 and along a number of columns 2. At one end of each track there is provided a light source 4 and at the other end of said track there is provided a light detector 5. A spring-biased pin 6 also Fig. 2 and 3 not shown, movable substantially perpendicularly to the tracks, is provided at each point of intersection of the tracks and is provided with two openings which are positioned so that with the pins in one position the openings are coaxial with the associated track of the columns and in a second position of the pin the tracks are blocked by the body of the pin. <IMAGE>
GB7902748A 1978-01-25 1979-01-25 Co-ordinate switching systems Withdrawn GB2013333A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NL7800925A NL7800925A (en) 1978-01-25 1978-01-25 COORDINATE SWITCH.

Publications (1)

Publication Number Publication Date
GB2013333A true GB2013333A (en) 1979-08-08

Family

ID=19830226

Family Applications (1)

Application Number Title Priority Date Filing Date
GB7902748A Withdrawn GB2013333A (en) 1978-01-25 1979-01-25 Co-ordinate switching systems

Country Status (4)

Country Link
DE (2) DE2848633A1 (en)
FR (1) FR2415921A1 (en)
GB (1) GB2013333A (en)
NL (1) NL7800925A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0054644A1 (en) * 1980-12-24 1982-06-30 BURROUGHS CORPORATION (a Michigan corporation) Photo-optical keyboard having light attenuating means
GB2406944A (en) * 2003-10-09 2005-04-13 Motorola Inc Keyboard switching devices

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3151209C2 (en) * 1981-12-23 1983-11-03 Siemens AG, 1000 Berlin und 8000 München Method for controlling the optoelectronic crosspoints of a switching system
DE3535551A1 (en) * 1985-10-04 1987-04-09 Guenter Brueninghaus Keyboard

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0054644A1 (en) * 1980-12-24 1982-06-30 BURROUGHS CORPORATION (a Michigan corporation) Photo-optical keyboard having light attenuating means
GB2406944A (en) * 2003-10-09 2005-04-13 Motorola Inc Keyboard switching devices

Also Published As

Publication number Publication date
FR2415921A1 (en) 1979-08-24
DE2848633A1 (en) 1979-07-26
DE7833328U1 (en) 1980-05-08
NL7800925A (en) 1979-07-27

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Legal Events

Date Code Title Description
WAP Application withdrawn, taken to be withdrawn or refused ** after publication under section 16(1)