Communications: electrical – Audible indication – Percussion-type sound producer
Patent
1980-03-08
1981-12-22
Groody, James J.
Communications: electrical
Audible indication
Percussion-type sound producer
112158E, G06F 302
Patent
active
043073832
ABSTRACT:
A touch sensitive control panel utilizing pyroelectric material to provide output signals representative of an area touched by an operator includes a plurality of conductors and pads of pyroelectric material selectively in contact with the conductors to provide a binary coded combination of voltage pulses on the conductors representative of a touched area of the control panel.
REFERENCES:
patent: 4078257 (1978-03-01), Bagley
patent: 4149476 (1979-04-01), Wurst et al.
patent: 4157539 (1979-06-01), Hunts et al.
Bell Edward L.
Davis David L.
Groody James J.
Smith Robert E.
The Singer Company
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