Position coordinate determination device

Details Position coordinate determination device Position coordinate determination device

1977-03-07

1978-03-28

Robinson, Thomas A.

Telegraphy

Systems

Position coordinate determination for writing

G08C 2100

Patent

active

040816036

ABSTRACT:
A position coordinate determination device wherein data generation lines are displaced from the edges of a data surface, and a sensing device is movably located on the surface. Erroneous detection of data resulting from reflection of signals at the edge of the sheet is inhibited by summing the times required for waves to pass between the sensor and both data generation lines. When this sum exceeds a predetermined level, an erroneous detection is indicated and the processing of the data may be inhibited.

REFERENCES:
patent: 3846580 (1974-11-01), Brenner
patent: 3904821 (1975-09-01), Whetstone et al.
patent: 4018989 (1977-04-01), Snyder et al.

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