Means and method for determining the rotation direction of an oi

Details Means and method for determining the rotation direction of an oi Means and method for determining the rotation direction of an oi

1987-07-21

1988-12-27

Swann, III, Glen R.

Communications: electrical

Condition responsive indicating system

Specific condition

G08B 2100

Patent

active

047943807

ABSTRACT:
A magnet and two magnetic sensing means are spatially related to each other, with each magnetic sensor sensing the relative movement between the magnet and the magnetic sensor. The magnetic sensor provides a signal corresponding to the relative movement. Circuitry connected to both magnetic sensors provides an alarm in accordance with the signals from both magnetic sensors when the rotation of the crank arm is in one direction and does not provide an alarm when the rotation of the crank arm is in the opposite direction.

REFERENCES:
patent: 3728676 (1973-04-01), Brown

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