Measuring and testing – Speed – velocity – or acceleration – Acceleration determination utilizing inertial element
Patent
1988-09-08
1990-02-20
Chapman, John
Measuring and testing
Speed, velocity, or acceleration
Acceleration determination utilizing inertial element
340429, 73431, G01P 1508
Patent
active
049015699
ABSTRACT:
A motion sensor comprising a permanent magnet suspended in pendulum fashion at one end of a length of cord string so as to be capable of swinging freely within an electrical coil when the motion sensor is moved. The movement of the magnet induces an emf in the coil which can be detected by simple electronic circuitry. The motion sensor is extremely simple but yet highly effective to detect both shock movement or a gentle motion.
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patent: 4684928 (1987-08-01), Takahashi et al.
patent: 4754644 (1988-07-01), Valentini
patent: 4788526 (1988-11-01), Eckstein et al.
Bauman Mary P.
Bell Robert P.
Chapman John
Haller James R.
Kaihoi Gregory P.
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