Patents by Inventor Volker Fritsch

Volker Fritsch 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).

  • Circuit arrangement to protect a semi-conductor switch which can be activated without contact (remotely)
    Patent number: 4600963
    Abstract: A circuit arrangement for protecting a remotely controllable semi-conductor switch which closes to interrupt an alternating current circuit in order to protect against an overload is disclosed in which a flip-flop is connected to control the operation of a current control circuit connected to the output of the semi-conductor switch in the event of an overload or short-circuit condition in the AC circuit. Provision may also be made for transient overload conditions, as well as providing a visual indication of the conducting condition of the semi-conductor switch.
    Type: Grant
    Filed: January 27, 1984
    Date of Patent: July 15, 1986
    Assignee: Euchner & Co.
    Inventors: Wolfgang Hertrich, Volker Fritsch