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Patent Searching and Data


Title:
Mechanical shock sensor
Document Type and Number:
WIPO Patent Application WO1997025624
Kind Code:
A3
Abstract:
A shock sensor has a sensing mass mounted on a metallic reed or spring which, under the influence of a crash-induced acceleration, drives the spring against a contact to close an electrical circuit. The contact end of the spring is twisted to be oriented with respect to the fixed contact at an angle of 60 degrees out of the plane containing the spring. The sensor is oriented such that the acceleration force is approximately normal to the plane containing the spring. The angled contact increases reliability, reduces closure signal noise, and increases contact dwell time. Dwell time can be further enhanced for high shock loads by providing a two stage mass spring system. A second mass/spring combination is arranged so the motion of the second mass, after the first reed has made electrical contact, holds the contact closed.

Inventors:
RENEAU DANIEL R (US)
Application Number:
PCT/US1996/019970
Publication Date:
September 12, 1997
Filing Date:
December 18, 1996
Export Citation:
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Assignee:
BREED AUTOMOTIVE TECH (US)
International Classes:
G01P15/135; H01H35/14; (IPC1-7): G01P15/135; H01H35/14
Foreign References:
DE3830782C11990-06-07
DE3509054C11986-04-24
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