Patents by Inventor Amos Selzer

Amos Selzer 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).

  • Vacuum contactor for motor control and method of making
    Patent number: 3996437
    Abstract: A vacuum contactor for motor control applications and method of making the same that produces a switch of minimum size and extremely long mechanical life. This method comprises the step of heating the vacuum assembly to not over 450.degree. C during the evacuation process thereby allowing use of welded diaphragm bellows having the attendant advantages of much smaller size and longer life for a given length of stroke as compared to formed bellows. Because the operating conditions for motor control applications do not require as high voltage and current breakdown levels and thus the residual gas level inside the vacuum contactor enclosure need not be as low as in the case of circuit breaker (interrupter) applications, limiting the heating to not over 450.degree. C allows use of AM-350 stainless steel welded diaphragm bellows without sacrificing its required mechanical life.
    Type: Grant
    Filed: December 3, 1973
    Date of Patent: December 7, 1976
    Assignee: Cutler-Hammer, Inc.
    Inventor: Amos Selzer