Belt drive connection malfunction sensor

Details Belt drive connection malfunction sensor Belt drive connection malfunction sensor

1979-06-04

1981-04-21

Swann, III, Glen R.

Communications: electrical

Selective

Having indication or alarm

307123, 324166, 324169, 340679, 340681, G08B 2100

Patent

active

042635780

ABSTRACT:
An A.C. voltage picked up from the alternator driven by an internal combustion engine is converted into a pulse train signal so that the number of the pulses is counted for a period of time defined by a reference timing signal produced in synchronization with the rotation of the crankshaft of the engine. When the number of the pulses reaches a predetermined value during the period of time, a counter produces an output signal to indicate that the slipping rate of the belt is within a tolerance. On the other hand, when the number of pulses is less than the predetermined number, the counter does not produce an output signal (indicating that the slipping rate is over the tolerance). The output of the counter may be averaged over a plurality of measuring times.

REFERENCES:
patent: 3075127 (1963-01-01), Secunde et al.
patent: 3836853 (1974-09-01), Cracraft et al.
patent: 3877003 (1975-04-01), Kamashima et al.

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