Logic level arming sensor for supplemental inflatable restraint

Details Logic level arming sensor for supplemental inflatable restraint Logic level arming sensor for supplemental inflatable restraint

1996-12-09

1998-12-08

English, Peter C.

Motor vehicles

With means for promoting safety of vehicle, its occupant or...

Responsive to sensing of acceleration, deceleration, or tilt...

280735, 307 101, 340436, 200 6153, B60R 2132

Patent

active

058457291

ABSTRACT:
An SIR has an AND gate for selectively passing a deployment signal from a deployment circuit to a firing circuit. An arming circuit includes a logic circuit containing a small normally closed arming sensor which disables the AND gate until a prescribed acceleration level occurs to open the arming sensor. A pulse stretcher ensures that if the sensor opens only briefly, the AND gate will remain enabled long enough to complete deployment. The arming sensor comprises a plastic housing with a cylindrical cavity, terminals closing opposite ends of the cavity, and a spring biased mass in the cavity which electrically connects the terminals until an acceleration moves the mass to break the connection.

REFERENCES:
patent: 3132221 (1964-05-01), Kachline et al.
patent: 3300603 (1967-01-01), Wakely
patent: 5083276 (1992-01-01), Okano et al.
patent: 5208484 (1993-05-01), Okano et al.
patent: 5657831 (1997-08-01), Furui

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