Patents by Inventor Gerhard Schwarz

Gerhard Schwarz 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).

  • Resettable thermal safety switch
    Patent number: 4118683
    Abstract: A resettable thermal safety switch having a bistable domed bimetallic disc serving as a heat-responsive switching element which pops from its normal curvature to an opposite curvature, thereby moving a contact breaking plate, the switch having a reset button which is arranged to return the disc to its normal state and to close the switch, but between the reset button and the moving parts of the switch is arranged a force-limiting assembly which prevents resetting or blocking of the switching action at the critical temperature.
    Type: Grant
    Filed: June 30, 1977
    Date of Patent: October 3, 1978
    Assignee: Firma Microtherm GmbH
    Inventor: Gerhard Schwarz
  • Photographic camera with interchangeable lens
    Patent number: 4092656
    Abstract: A photographic camera with an interchangeable lens and an electrically driven function actuator for actuating some function of the camera such as the operation of the shutter. The circuit of the function actuator includes a switch responsive to the position of the interchangeable lens, so that the function actuator cannot be operated unless the interchangeable lens is fully seated or engaged in proper operating position.
    Type: Grant
    Filed: November 15, 1976
    Date of Patent: May 30, 1978
    Assignee: Carl Zeiss Stiftung
    Inventors: Rudolf Lang, Gerhard Schwarz
  • Non-resettable heat responsive safety switch
    Patent number: 4025889
    Abstract: A non-resettable heat responsive safety switch featuring two contact sleeves inside a jacket with a displaceable intermediate contact body of metal granulate, a preloaded compression spring biasing the contact body in the direction of contact interruption, a normally solid trigger body of fusible material holding the contact body in its normal, sleeve-bridging position, against the spring bias, until, at a critical temperature level, the trigger body yields to the spring which moves the contact body and breaks contact in the switch.
    Type: Grant
    Filed: September 8, 1975
    Date of Patent: May 24, 1977
    Assignee: Firma Microtherm GmbH
    Inventor: Gerhard Schwarz