Patents Assigned to Stop Alert Corporation
  • Pressure change responsive sensor and related vacuum operable switch assembly
    Patent number: 4219710
    Abstract: A pressure change responsive sensor and related vacuum operable switch assembly capable of operation from the manifold of an internal combustion engine to activate a signal in anticipation of the application of the brakes of an automobile. The vacuum operable switch assembly is an improvement on the applicant's U.S. Pat. No. 3,639,898 for Differential Pressure Control System And Switch Means Therefor, and is capable of adjustment to function with internal combustion engines having different manifold vacuum characteristics.
    Type: Grant
    Filed: April 15, 1976
    Date of Patent: August 26, 1980
    Assignee: Stop Alert Corporation
    Inventor: Robert G. Booth