×

Grip-responsive dozing driver alarm

  • US 4,485,375 A
  • Filed: 09/29/1982
  • Issued: 11/27/1984
  • Est. Priority Date: 09/29/1982
  • Status: Expired due to Term
First Claim
Patent Images

1. A driver alarm system for a vehicle having a steering wheel rim, said system comprising:

  • a hand-grippable body;

    means for attaching said body to the steering wheel rim at a location to be gripped by the hand of the driver applied to the rim for normal steering of the vehicle;

    a pair of push buttons on said body projecting therefrom in generally opposite directions at locations to be depressed when said body is gripped by the hand of the driver of the vehicle for steering;

    means for urging each push button to an extended position, said urging means yielding to permit movement of each push button to a depressed position when said body is gripped by the hand of the driver of the vehicle;

    a normally completed electric circuit having a completed condition when either push button is in the extended position and an interrupted condition only when both push buttons are in the depressed condition; and

    an alarm signalling device in said circuit energized to produce an alarm signal when said circuit is in the completed condition, whereby the alarm signal is produced whenever the driver of the vehicle fails to grip said body sufficiently to maintain both push buttons in the depressed condition.

View all claims
  • 0 Assignments
Timeline View
Assignment View
    ×
    ×