Patents Assigned to Simpson Electric Company, a Division of American Gage & Machine Company
  • Engine speed indicator
    Patent number: 4224570
    Abstract: An engine rpm sensor utilizes a gas filled lamp for connection to a circu including an engine ignition system and a spark plug. A light pipe is exposed to the lamp and couples an optical signal each time a spark plug is fired to a remote location for utilization in a display or indicating device.
    Type: Grant
    Filed: December 11, 1978
    Date of Patent: September 23, 1980
    Assignee: Simpson Electric Company, a Division of American Gage & Machine Company
    Inventor: Francis P. Meserow