Co-ordinate plate for co-ordinate reader

Details Co-ordinate plate for co-ordinate reader Co-ordinate plate for co-ordinate reader

1977-03-08

1979-03-06

Robinson, Thomas A.

Telegraphy

Systems

Position coordinate determination for writing

G08C 2100

Patent

active

041432401

ABSTRACT:
A co-ordinate plate for a co-ordinate reader, which utilizes delays of oscillation waves in a magnetostrictive material. The co-ordinate plate is composed of a thin plate of magnetrostrictive material having a co-ordinate plane and similar propagation characteristics of magnetostrictive oscillation waves in directions of at least two co-ordinate axes of the co-ordinate plane, two exciting coils for producing magnetostrictive oscillation in the thin plate of magnetostrictive material in one and the other of co-ordinate directions of the co-ordinate plane, and flux keepers for shielding magnetic fluxes emanating from the exciting coils.

REFERENCES:
patent: 3806642 (1974-04-01), Veith et al.
patent: 3904821 (1975-09-01), Whetstone et al.
patent: 3956588 (1976-05-01), Whetstone et al.
patent: 4018989 (1977-04-01), Snyder et al.

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