AU2304888A - Pyroelectric keyboard - Google Patents

Pyroelectric keyboard

Info

Publication number
AU2304888A
AU2304888A AU23048/88A AU2304888A AU2304888A AU 2304888 A AU2304888 A AU 2304888A AU 23048/88 A AU23048/88 A AU 23048/88A AU 2304888 A AU2304888 A AU 2304888A AU 2304888 A AU2304888 A AU 2304888A
Authority
AU
Australia
Prior art keywords
pyroelectric
keyboard
pyroelectric keyboard
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.)
Abandoned
Application number
AU23048/88A
Inventor
Peter Francis Radice
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.)
Pennwalt Corp
Original Assignee
Pennwalt 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 Pennwalt Corp filed Critical Pennwalt Corp
Publication of AU2304888A publication Critical patent/AU2304888A/en
Abandoned 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
AU23048/88A 1987-08-21 1988-07-25 Pyroelectric keyboard Abandoned AU2304888A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US8844287A 1987-08-21 1987-08-21
US088442 1987-08-21

Publications (1)

Publication Number Publication Date
AU2304888A true AU2304888A (en) 1989-03-09

Family

ID=22211404

Family Applications (1)

Application Number Title Priority Date Filing Date
AU23048/88A Abandoned AU2304888A (en) 1987-08-21 1988-07-25 Pyroelectric keyboard

Country Status (2)

Country Link
AU (1) AU2304888A (en)
WO (1) WO1989001720A1 (en)

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3603982A (en) * 1969-05-02 1971-09-07 Ncr Co Data entry means
US3648050A (en) * 1970-08-06 1972-03-07 Tuh Kai Koo Optoelectronic data entry means having plurality of control means to direct part of radiation in channel from radiation source to output channel
US4013342A (en) * 1975-12-19 1977-03-22 Narodny Leo H Keyboard using optical switching
EP0004520A1 (en) * 1978-03-24 1979-10-03 International Business Machines Corporation Keyboard with an array of light beam splitters
JPS5840805B2 (en) * 1978-04-10 1983-09-08 東レ株式会社 Coordinate input structure
JPS54174384U (en) * 1978-05-30 1979-12-08

Also Published As

Publication number Publication date
WO1989001720A1 (en) 1989-02-23

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