Computer control

Patent 4782327 Issued on November 1, 1988. Estimated Expiration Date:

November 1, 2005. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.

Abstract Claims Description Full Text

Patent References

Re30094

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Inventors

Assignee

Kley; Victor B.

Application

No. 06/688444 filed on 01/02/1985

US Classes:

341/2, Plural denominationally related carriers (e.g., coarse/fine geared discs)250/221, Controlled by article, person, or animal341/20, BODILY ACTUATED CODE GENERATOR341/5For X or Y coordinate determination (e.g., stylus-pad)

Examiners

Primary: Caldwell, Sr., John W.
Assistant: Queen, Tyrone

Attorney, Agent or Firm

Bernard, Rothwell & Brown

International Classes

G05G 9/00 (20060101)
G06F 3/02 (20060101)
G05G 9/047 (20060101)
G06F 3/033 (20060101)

Abstract

A computer control includes a control member movably mounted for movement in two dimensions wherein orthogonally related gratings are moved to the corresponding directions to generate pairs of quadrature related signals. Circuitry produces binary signals defining four states for each cycle of quadrature signals to change a corresponding count indicating position of the control member. In another variation patterns each having a plurality of spots with a unique combination of gray levels are sensed by a rectangular array of photosensers to determine the position of the movable member.