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Jaw position and/or force detector for power chuck

  • US 4,536,000 A
  • Filed: 04/22/1983
  • Issued: 08/20/1985
  • Est. Priority Date: 11/10/1982
  • Status: Expired due to Term
First Claim
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1. In a chuck having 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, the improvement comprising:

  • respective means on the chuck body including transducers connected to the jaws for generating a signal proportional to a parameter of the respective jaw;

    signal-transmitting means on the chuck for transmitting the signals from the chuck body;

    stationary signal-receiving means adjacent the chuck body for receiving the transmitted signals wholly without physical contact with the signal-transmitting means;

    stationary energy-transmitting means adjacent the chuck body for transmitting energy; and

    respective energy-receiving means on the chuck body for receiving the transmitted energy wholly without physical contact with the energy-transmitting means and for powering the signal-transmitting means therewith, said transducer being a force transducer and is braced between the respective jaw and the operator, each jaw having a radially inner part forming the respective workpiece-engaging face and a radially outer part coupled to the operator and limitedly radially displaceable relative to the respective inner part, the transducers being engaged generally between the parts.

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