Patents by Inventor James Arthur Hirsch

James Arthur Hirsch 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).

  • Fuel igniter comprising a novel silicon carbide composition and process for preparing the composition
    Patent number: 4120827
    Abstract: A composition comprising negatively doped hot pressed particulate silicon carbide, the process for making the composition, an electrical hot surface fuel ignitor manufactured from the composition, a silicon brazed electrical connection for the ignitor and an ignitor circuit containing a dropping resistance.
    Type: Grant
    Filed: March 12, 1976
    Date of Patent: October 17, 1978
    Assignee: The Carborundum Company
    Inventors: Charles John Boos, Elwood Benjamin Hausler, James Arthur Hirsch, Martin Richard Kasprzyk, Elmer Gene Smith
  • Adjustable interval time switch device
    Patent number: RE29086
    Abstract: 1. In a time switch device, electronic means comprising a power supply circuit, a timer circuit, and an output relay circuit, said timer circit cooperating with said power supply circuit to produce an electrical impulse of predetermined periodicity, said output relay circuit being adapted to dispatch said electrical impulse to initiate operation of a stepping means, said stepping means being adapted to control a timed load function, and said stepping means being further adapted to reset said electronic means after each interval of time so that said electrical impulse may be automatically repeated.
    Type: Grant
    Filed: November 21, 1969
    Date of Patent: December 21, 1976
    Assignee: P. R. Mallory & Co., Inc.
    Inventors: Robert M. Murphy, James Arthur Hirsch