Patents by Inventor Gordon Barr Spellman

Gordon Barr Spellman 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).

  • Remote wireless switch sensing circuit using RF transceiver in combination with a SAW chirp processor
    Patent number: 6144288
    Abstract: A circuit assembly senses a state of a variable state device, wherein a data signal representative of the state is communicated via wireless telegraphy. A surface acoustic wave (SAW) device, having a plurality of interdigital transducers (IDTs) comprises a wave launching IDT and a state information IDT, wherein the plurality of IDTs are in acoustical communication and the state information IDT is in electrical communication with an antenna through the variable state device. An RF transceiver communicates a trigger signal to the SAW device, wherein the trigger signal causes a launching of a SAW wave from the wave launching IDT towards the state information IDT. The state information IDT generates a signal pulse in response thereto and communicates the pulse to the antenna through the variable state device.
    Type: Grant
    Filed: March 28, 1997
    Date of Patent: November 7, 2000
    Assignee: Eaton Corporation
    Inventors: Ronald R. Jahn, Ruth E. Hubbell, David L. McClanahan, Walter L. Rutchik, Gordon Barr Spellman