Patents by Inventor Hermann Gebhard

Hermann Gebhard 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).

  • Reflection light bearer system with self-testing feature
    Patent number: 4797548
    Abstract: A reflection light barrier with a measuring light emitter which emits light nto a space to be monitored, and with a measuring light receiver which receives light reflected from an object present in the space to be monitored. The reflection light barrier, also referred to as light sensor, according to this invention is characterized in that at least one further light receiver is provided which receives the light of the measuring light emitter without reflection, and at least one further light emitter is provided which emits light in a test cycle that is received without reflection by the measuring light receiver. Improper operating conditions can be recognized and indicated thereby.
    Type: Grant
    Filed: September 1, 1987
    Date of Patent: January 10, 1989
    Assignee: Fraunhofer Gesellschaft zur Forderung der angewandten Forschung e.V.
    Inventors: Heinz Kobbing, Hermann Gebhard