Patents by Inventor David F. Yagger

David F. Yagger has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Patent number: 4253325
    Abstract: A transducer calibrating assembly for calibrating the spindle transducers in a multiple spindle machine tool without the need for completely dismantling the machine to perform the calibration operation. The transducer calibrating assembly includes a torque coupling assembly 18 and a support coupling 20 which are connected by an articulated lever assembly 22 including a threaded shaft 26 a slide clamp 28 and a clamp shaft 24. Torque coupling assembly 18 includes a torque coupling 48 attached at a first socket to a master transducer housing 18, into which is inserted a spindle drive 5 of a spindle 3 on which is mounted the transducer to be calibrated. Support coupling 20 is attached directly to an adjacent spindle drive 5'. Leads 12 and 34 connect the transducer to be calibrated and the master transducer to measuring circuits 10 and 32, respectively. Measuring circuit 10 also includes variable resistors 148 and 150 to allow adjustments to be made in the measuring circuit of the transducer being calibrated.
    Type: Grant
    Filed: August 28, 1979
    Date of Patent: March 3, 1981
    Assignee: Cummins Engine Company, Inc.
    Inventors: Robert H. Reed, David F. Yagger