Viscous damped crash sensor unit with inertia switch

Details Viscous damped crash sensor unit with inertia switch Viscous damped crash sensor unit with inertia switch

1976-09-07

1978-06-27

Scott, James R.

Electricity: circuit makers and breakers

Special application

Change of inclination or of rate of motion responsive

200 6153, H01H 3514

Patent

active

040976998

ABSTRACT:
A crash sensor responsive to a predetermined change in velocity for activating a vehicular safety device. The present sensor has a gas-filled sealed tube having an inertial mass disposed therein in a closely fitting manner forming an annular orifice between the mass and the tube. The mass is preloaded and biased and, upon the tube experiencing a level of velocity change above a predetermined amount, movement of the mass in the tube to activate the set of electrical contacts is damped by viscous laminar flow of the gas through the annular orifice.

REFERENCES:
patent: 3038973 (1962-06-01), Alpert
patent: 3083276 (1963-03-01), Sear et al.
patent: 3096411 (1963-07-01), Chabrek et al.
patent: 3217121 (1965-11-01), Hradek
patent: 3553482 (1971-01-01), Tavis
patent: 3715535 (1973-02-01), Urenda
patent: 3889130 (1975-06-01), Breed
patent: 3974350 (1976-08-01), Breed
Breed, David S.; "The Theory and Design of a Pneumatic Time Delay Mechanism"; College Thesis; Dept. of Mechanical Engineering; M.I.T.; Sep. 1961.

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