Patents by Inventor Gerald J. Witter

Gerald J. Witter 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).

  • Method of making electrical contact material
    Patent number: 4249944
    Abstract: An electrical contact material which is particularly well suited for use in circuit breaker switches consisting essentially of silver in the amount of about 20% to 50% by weight, nickel in the amount of about 2% to 13% by weight, phosphorous in the amount of about 90 ppm to 1000 ppm, and the remainder tungsten. In one embodiment of the contact material forming method provided by the invention, starting particle sizes and liquid phase sintering parameters are selected to yield a relatively coarse grain size in the contact material microstructure with an optimum combination of resistance to oxidation, electrical erosion and distortion associated with high-current interruptions.
    Type: Grant
    Filed: April 9, 1979
    Date of Patent: February 10, 1981
    Assignee: Fansteel Inc.
    Inventor: Gerald J. Witter
  • Electrical contact material and method for making the same
    Patent number: 4162160
    Abstract: An electrical contact material which is particularly well suited for use in circuit breaker switches consisting essentially of silver in the amount of about 20% to 50% by weight, nickel in the amount of about 2% to 13% by weight, phosphorus in the amount of about 90 ppm to 1000 ppm, and the remainder tungsten. In one embodiment of the contact material forming method provided by the invention, starting particle sizes and liquid phase sintering parameters are selected to yield a relatively coarse grain size in the contact material microstructure with an optimum combination of resistance to oxidation, electrical erosion and distortion associated with high-current interruptions.
    Type: Grant
    Filed: August 25, 1977
    Date of Patent: July 24, 1979
    Assignee: Fansteel Inc.
    Inventor: Gerald J. Witter