Abstract A liquid level measurement device relying upon the principle of a resistance bridge wherein the height sensing means is one resistor of the bridge. The height sensing resistor is comprised of a fine wire extending from the bridge circuit to a grounding rod. The fine wire extends generally parallel to, but spaced from, the grounding rod in order to constitute the height sensor. In use, the height sensor is inserted in the liquid whose height is to be measured in such a way that the grounding rod and the fine wire extend generally perpendicular to the liquid level line. Thus, the aqueous ionic media whose height is being measured will short out that portion of the fine wire below the liquid level to decrease the effective resistance of the height sensor. This has the effect of unbalancing the bridge circuit to give a reading on a meter that is an indication of the height of the liquid.
Inventors
👤 B Miller
Bibliographic Details
Application Number—
JurisdictionUS
Data Sourcegoogle_patents
Last Synchronized2026-10-26 15:25
CPC Classifications
G; G01; G01F; G01F23/00; G01F23/22; G01F23/24
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
146 words
A liquid level measurement device for a liquid medium having film creation tendencies, said device comprising a balancing circuit, a non-film forming fine wire of the resistance type constituting one resistor in said balancing circuit, there being three additional resistors in said circuit to make a four resistor bridge balancing circuit, a grounding rod, said fine wire running parallel to said grounding rod and being spaced from said grounding rod by a gap, said fine wire having a diameter of from 0.0126 inches to 0.032 inches so as to resist the formation of droplets thereon to prevent film formation from said liquid medium whereby said liquid bridges said gap between said fine wire and said grounding rod to short out the resistance of said wire below liquid level and to provide an unbalancing effect in said bridge circuit, and meter means to measure said unbalancing effect.
Claim 2
Dependent Claim
146 words
A liquid level measurement device for a liquid medium having film creation tendencies, said device comprising a balancing circuit, a non-film forming fine wire of the resistance type constituting one resistor in said balancing circuit, there being three additional resistors in said circuit to make a four resistor bridge balancing circuit, a grounding rod, said fine wire running parallel to said grounding rod and being spaced from said grounding rod by a gap, said fine wire having a diameter of from 0.0126 inches to 0.032 inches so as to resist the formation of droplets thereon to prevent film formation from said liquid medium whereby said liquid bridges said gap between said fine wire and said grounding rod to short out the resistance of said wire below liquid level and to provide an unbalancing effect in said bridge circuit, and meter means to measure said unbalancing effect.
Claim 3
Dependent Claim
11 words
The device of claim 1 wherein said liquid medium is sewage.
Claim 4
Dependent Claim
14 words
The device of claim 1 wherein there are three passes of said fine wire.