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US Patent: RE28,761
Manual Control System for Numerically Controlled Machine
Patentees:
Thomas E. Hentz - Cincinnati, OH
Robert K. Burroughs - Batavia, OH

USPTO Classifications:
318/39, 318/571, 318/605, 318/661

Tool Categories:
metalworking machines : machine tool controls

Assignees:
LeBlond Inc. - Cincinnati, OH

Manufacturer:
Not known to have been produced

Witnesses:
Unknown

Patent Dates:
Applied: Oct. 29, 1974
Granted: Apr. 06, 1976

Reissue Information:
Reissue of 3,766,460 (Oct. 16, 1973)

Patent Pictures:
USPTO pdf tiff
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"Vintage Machinery" entry for R. K. Leblond Machine Tool Co.
Description:
Abstract

A manual control system including a powered feed for a numerically controlled machine tool. The system includes a manually operable differential resolver located in the position feedback loop of the servo control system for each slide and a variable speed motor for driving that differential resolver at a controlled rate so as to effect controlled feeding movement of the slides independent of the numerical control unit.

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