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Velocity change sensor with spring bias

  • US 5,031,931 A
  • Filed: 12/06/1989
  • Issued: 07/16/1991
  • Est. Priority Date: 12/06/1989
  • Status: Expired due to Term
First Claim
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1. An accelerometer for sensing velocity changes of a motor vehicle, said accelerometer comprising:

  • a housing having a side wall, a first end and a second end;

    tubular path means for defining a path extending between said first and second ends substantially coextensively with the length of the housing;

    a first blade disposed at a first preselected distance from said first end and extending into said path;

    a second blade disposed at a second preselected distance from said first end smaller than said first blade and extending into said path; and

    an inertial mass disposed in and guided by said tubular path, said inertial mass being biased toward said first end by a biasing force generated by said first blade;

    said inertial mass being adapted to move in said tubular path in response to an acceleration toward said first end bending said first blade to contact said second blade.

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