Apparatus for detecting level changes in distance

Details Apparatus for detecting level changes in distance Apparatus for detecting level changes in distance

1981-04-06

1983-08-09

Yasich, Daniel M.

Measuring and testing

Liquid level or depth gauge

With illumination

73317, 73309, 250227, G01F 2308, G02B 508

Patent

active

043971830

ABSTRACT:
An apparatus useful in detecting changes in distance comprises: a signal emitter capable of emitting a substantially constant signal; a signal reflector capable of reflecting at least a portion of the substantially constant signal and being moveable in a substantially straight line direction toward or away from the emitter; and a signal receiver capable of receiving the reflected signal, whereby a change in the received signal is indicative of a change in the distance between the emitter and reflector. This apparatus is particularly useful in detecting changes in the amount of liquid in a liquid storage tank.

REFERENCES:
patent: 2588672 (1952-03-01), Turvey
patent: 2949777 (1960-08-01), Ferron
patent: 3314292 (1967-04-01), Schulte et al.
patent: 3940608 (1976-02-01), Kissinger et al.
patent: 4064754 (1977-12-01), Frey
patent: 4247784 (1981-01-01), Henry
patent: 4314760 (1982-02-01), Hodge et al.

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