US Patent: 3,475,998 - Method and Apparatus for Controlling the Motion of a Reciprocable Tool Element or the Like


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US Patent: 3,475,998

Method and Apparatus for Controlling the Motion of a Reciprocable Tool Element or the Like

Patentees:

Daniel J. Steiner (exact or similar names) - Kaukanuna, Outagamie County, WI

Cyril J. Schneider (exact or similar names) - Kaukanuna, Outagamie County, WI

USPTO Classifications:

318/597, 318/602, 408/8

Tool Categories:

metalworking machines : machine tool controls

Assignees:

Giddings & Lewis, Inc. - Fond Du Lac, Fond Du Lac County, WI

Manufacturer:

Not known to have been produced

Witnesses:

Unknown

Patent Dates:
Applied:	Oct. 16, 1967
Granted:	Nov. 04, 1969

Patent Pictures:

USPTO (New site tip)
Google Patents
Report data errors or omissions to steward Joel Havens
"Vintage Machinery" entry for Giddings & Lewis Manufacturing Co.

Description:

Abstract:

In the control of a drilling machine or the like, the drilling cutter is traversed rapidly toward a workpiece and its :motion is converted to a slower feed rate at the instant the cutter engages the workpiece. Such engagement is sensed by producing a signal in the form of a series of pulses having a frequency proportional to the velocity of the cutter during traverse, and by detecting a decrease in the frequency resulting from a reduction in the velocity of the cutter as the latter strikes the workpiece. When such detection occurs, an engagement signal is produced to reduce the velocity of the cutter to a feed rate, and measurement of the displacement of the cutter is begun.