Patents Assigned to G. Dietrich GmbH Spezialfabrik fur Burstenhalter u. Kunststoffteile
  • Apparatus for monitoring the wear upon carbon brushes in electrical machines
    Patent number: 4831302
    Abstract: The wear upon at least one of several carbon brushes in a brush holder is monitored by a lever one arm of which is biased against the rear end face of a selected brush by a spring and another arm of which actuates a microswitch in response to a predetermined amount of wear upon the brush as a result of engagement with a commutator or a slip ring, namely in response to a predetermined angular displacement of the lever from a starting position which is assumed by the lever when its first arm engages a freshly inserted brush.
    Type: Grant
    Filed: October 16, 1987
    Date of Patent: May 16, 1989
    Assignee: G. Dietrich GmbH Spezialfabrik fur Burstenhalter u. Kunststoffteile
    Inventors: Michael Dietrich, Wolfgang Dietrich