G - Physics
01
F
73/39
G01F 23/40 (2006.01) G01F 23/44 (2006.01)
Patent
CA 1321892
TANK GAUGE ABSTRACT OF THE DISCLOSURE A liquid level gauge for tanks includes a float located in the tank to follow the level of liquid in the tank. A cable extends from the float to the top of the tank and over a pulley to the outside of the tank, where it is attached to a weight for maintaining tension in the cable. The pulley is attached to a signal generator that generates two electrical signals. These are lead from the signal generator to a counter which decodes the two signals and produces a running count representing the height of liquid in the tank. The preferred embodiment of the invention uses a segmented optical disk and two phototransistors for producing two out of phase pulsed signals. The number of pulses represents the magnitude of float movements, while the sequence of the phase-shifted pulses represents the direction of float movement.
590922
Ade & Company
Grimes John F.
LandOfFree
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