Patents Assigned to Frankl & Kirchner
  • Contactless synchronizer for sewing machines
    Patent number: 3990374
    Abstract: A contactless synchronizer for sewing machines has been developed. This synchronizer contains at least two transmitting elements which rotate with the sewing machine shaft and indicate the angular position of the machine with respect to stationary sensing elements. These sensing elements form a part of the entire circuit of the machine and produce control pulses as each transmitting element passes a sensing element.
    Type: Grant
    Filed: March 28, 1975
    Date of Patent: November 9, 1976
    Assignees: Frankl & Kirchner, Fabrik fur Elektromotoren u. elektrische Apparate
    Inventor: Alfred Heidt