Inertia switch

Electricity: circuit makers and breakers – Special application – Change of inclination or of rate of motion responsive

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Details

200 6151, 200 83N, 200 83W, H01H 3514, H01H 3540

Patent

active

049028618

ABSTRACT:
An inertia switch for a supplemental inflatable restraint system. The switch comprises a casing that is divided into two chambers by an axially movable diaphragm. The diaphragm carries an electrical contact on one face and an inertial mass on the other. A pair of terminals are disposed in the path of travel of the electrical contact so that when the switch is subjected to axial deceleration force the contact is urged toward the terminals. Actual contact is made when the deceleration force equals or exceeds a predetermined deceleration characteristic. The deceleration characteristic is a function not only of the diaphragm, the electrical contact, and the mass, but also of a control orifice located in an orifice that communicates the two chambers with each other. The chambers are constructed such that air is forced from one chamber into another through the control orifice when deceleration occurs and this imparts a dampening to the motion of the diaphragm.

REFERENCES:
patent: 665998 (1901-01-01), Davis
patent: 2741675 (1956-04-01), Chase et al.
patent: 3097272 (1963-07-01), Hautly
patent: 3717861 (1973-02-01), Wright, Jr.
patent: 3911393 (1975-10-01), Biggs
patent: 4581506 (1986-04-01), Bai et al.
patent: 4581507 (1986-04-01), Bai et al.
patent: 4608468 (1986-08-01), Bai

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