Electricity: circuit makers and breakers – Special application – Change of inclination or of rate of motion responsive
Patent
1989-04-06
1990-12-25
Scott, J. R.
Electricity: circuit makers and breakers
Special application
Change of inclination or of rate of motion responsive
200 6153, 335151, H01H 3514, H01H 5100, G01R 3102
Patent
active
049805266
ABSTRACT:
A testing device (11) is applied to an acceleration shock sensor (10) of the type having a reed switch (24) that operates such that the net mass of a magnet (40) is accelerated against a spring (50) upon vehicle impact or rapid deceleration of the vehicle. The change in magnet (40) position causes a change in the magnetic field that activates the reed switch (24). The testing device (11) includes an electromagnetic coil (90) mounted in an area of minimal reed switch (24) sensitivity. The electromagnetic coil (90) is connected to be capable of providing a current flow that creates a magnetic field that opposes the magnetic field of the magnet (40). Upon energizing of the coil (90), the magnet (40) is urged to accelerate in a manner that emulates the acceleration of the magnet (40) caused by vehicle collision.
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Daimler-Benz AG
Hamlin Incorporated
Scott J. R.
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