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US Patent: 5,487,315
Rotational Motion Limit Detector System and Method
Patentees:
Philip J. Finet (exact or similar names) - Milwaukee, Milwaukee County, WI
Edward Kirkham (exact or similar names) - Brookfield, Waukesha County, WI

USPTO Classifications:
200/47, 403/27, 73/865.9

Tool Categories:
metalworking machines : metalworking machine mechanisms

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

Manufacturer:
Not known to have been produced

Witnesses:
Unknown

Patent Dates:
Applied: Jul. 16, 1993
Granted: Jan. 30, 1996

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:

A system for detecting a limit of acceptable rotation for a joint is disclosed. The system includes a support that supports the joint and keeps its pivot point substantially stationary with respect thereto. The system also includes an extensible leg connected to the joint. A contoured member is mounted adjacent the extensible leg and has a surface shaped as a portion of a sphere. The contoured member is located so the pivot point of the joint substantially coincides with the center of the sphere and the periphery of the contoured member corresponds to the limit of acceptable rotation for the joint. Thus, as the leg pivots, the contoured member also moves a similar amount. A detector is used to detect the periphery of the contoured member surface and to assist in preventing further rotation of the joint in that direction.

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