Jaw position and/or force detector for power chuck
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
Aug 20, 1985
Grant Date -
N/A
app pub date -
Apr 22, 1983
filing date -
Nov 10, 1982
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A chuck has a chuck body rotatable about an axis, a plurality of jaws radially displaceable on the body and each having a radially inwardly directed workpiece-engaging face, and an axially displaceable operator linked to the jaws to radially displace same relative to the chuck body. Respective transducers on the chuck body are connected to the jaws for generating a signal proportional to a parameter of the respective jaw. These signals are transmitted from the chuck body to a stationary signal receiver adjacent the chuck body wholly without physical contact with the signal transmitter. Similarly, a stationary energy transmitter adjacent the chuck body transmits energy and a receiver on the chuck body receives the transmitted energy wholly without physical contact with the energy transmitter and powers the signal transmitter therewith. The transducers can be position or force transducers, for instance constituted by strain gauges or linear potentiometers. The signal and energy transmitters and receivers are formed by coaxial coils carried on a fixed support and on the chuck.
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