Two coordinate position sensing systems

Details Two coordinate position sensing systems Two coordinate position sensing systems

1978-11-02

1980-08-05

Robinson, Thomas A.

Telegraphy

Systems

Position coordinate determination for writing

G08C 2100

Patent

active

042163528

ABSTRACT:
A system for determining X and Y coordinate positions on a surface wherein a first transducer generates plane waves having electromagnetic fields associated therewith, which plane waves travel along the direction of the X-coordinate and a second transducer generates plane waves having electromagnetic fields associated therewith, which plane waves travel along the direction of the Y-coordinate. A receiver transducer at the position to be determined detects the presence of the electromagnetic fields associated with the plane waves as they travel past the receiver transducer and the distances traveled by the plane waves are appropriately calculated either by determining the times of travel using pulse wave signals or by determining phase relationships using continuous wave signals.

REFERENCES:
patent: 3121955 (1964-02-01), King
patent: 3846580 (1974-11-01), Brenner
patent: 3904821 (1975-09-01), Whetstone et al.
patent: 4018989 (1977-04-01), Snyder et al.
patent: 4035762 (1977-07-01), Chamuel
patent: 4081603 (1978-03-01), Davis et al.
patent: 4121155 (1978-10-01), Chamuel

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