US Patent: 3,475,997 - Method and Apparatus for Controlling Motions of a Drilling Cutter or the Like


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US Patent: 3,475,997

Method and Apparatus for Controlling Motions of a Drilling Cutter or the Like

Patentee:

Jack A. Wohfeil (exact or similar names) - Fond Du Lac, Fond Du Lac County, WI

USPTO Classifications:

318/597, 318/602, 318/603, 408/8

Tool Categories:

metalworking machines : machine tool controls

metalworking machines : metalworking machine mechanisms : nc and cnc apparatus

Assignees:

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

Manufacturer:

Not known to have been produced

Witnesses:

Unknown

Patent Dates:
Applied:	Mar. 10, 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 toward a workpiece and its motion converted to a slower feed rate at the instant the cutter engages the workpiece. Such engagement is signaled by producing first and second electrical signals whenever the cutter is moving respectively toward or away from the workpiece, and detecting the momentary appearance of the second signal which results when the cutter strikes and rebounds slightly from the workpiece.