Patents Assigned to Westport Development & Mfg. Co. Inc.
  • Dual acting snap switch
    Patent number: 4017699
    Abstract: Two single pole flexible blade snap switches are mounted together to have both actuated essentially simultaneously by the same position of a common element by mechanically connecting together but electrically insulating the free ends of the two blades.
    Type: Grant
    Filed: May 12, 1975
    Date of Patent: April 12, 1977
    Assignee: Westport Development & Mfg. Co., Inc.
    Inventor: Robert R. Hellman
  • Switch for sensing a selected ratio between two different pressures
    Patent number: 4006329
    Abstract: A device for providing a measurement of the value of the ratio of two pressures by sensing the position of a member that is urged in one direction by one pressure and oppositely by the other pressure with the element further having both pressures set against the same movable support of the element. A third pressure of essentially a high vacuum acts on the remainder of the element not acted on by the other pressures and minimizes the effects of temperature while enabling the device to be precise over a wide range of pressures.
    Type: Grant
    Filed: May 14, 1975
    Date of Patent: February 1, 1977
    Assignee: Westport Development & Mfg. Co. Inc.
    Inventors: Robert R. Hellman, Marion T. Mikita