Acoustic contact sensor for handwritten computer input

Details Acoustic contact sensor for handwritten computer input Acoustic contact sensor for handwritten computer input

1986-12-09

1989-07-04

Tarcza, Thomas H.

Communications, electrical: acoustic wave systems and devices

Transmitter systems

367907, 178 18, 364188, 340706, G09G 100

Patent

active

048456845

ABSTRACT:
An acoustic contact sensor for handwritten computer input is disclosed herein. The contact sensor comprises ultrasonic sending transducer means, receiving transducer means and circuit means for providing a logic signal to a computer when contact is made. The sending and receiver transducer means can either individually be coupled to a pen stylus or writing and/or display surface.

REFERENCES:
patent: 3134099 (1964-05-01), Woo
patent: 3156766 (1964-11-01), Stamps
patent: 3614992 (1971-10-01), Whitehouse et al.
patent: 3857022 (1974-12-01), Rebane et al.
patent: 3885224 (1975-05-01), Klahr
patent: 4012588 (1977-03-01), Davis et al.
patent: 4317005 (1982-02-01), de Bruyne
patent: 4398275 (1983-08-01), Zehner
patent: 4677428 (1987-06-01), Bartholow

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