Patents by Inventor Ulrich Treviranus

Ulrich Treviranus 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 for automatic level control for optical sensors with pulsed radiation, for example for surveillance equipment
    Patent number: 4068222
    Abstract: Alarm signals are produced in response to variations in the radiation conditions between a pulsed IR-transmitter and a IR receiver whose output amplitude is adjustable and which is synchronously chopped by the emitted pulses, and the adjustable output signal voltage of the receiver is compared with a reference signal voltage derived from the transmitter in a comparator which is chopped synchronously with the pulse frequency of the transmitter. The comparator is followed by a control voltage generator with an integrator stage for a control element, which controls the output amplitude of the receiver, and a decision unit, to which an alarm means and a control indicator are connected.
    Type: Grant
    Filed: November 4, 1975
    Date of Patent: January 10, 1978
    Assignee: U.S. Philips Corporation
    Inventor: Ulrich Treviranus