Liquid gaging system null balance circuitry

Details Liquid gaging system null balance circuitry Liquid gaging system null balance circuitry

1980-05-14

1982-09-21

Kreitman, Stephen A.

Measuring and testing

Liquid level or depth gauge

Immersible electrode type

G01F 2326

Patent

active

043500390

ABSTRACT:
Circuitry for nulling a signal from a capacitive sensor apparatus with a signal from a reference. The invention includes capacitive sensor apparatus for providing a liquid measurement signal. Also included is reference apparatus for selectively providing a series of reference signals having predetermined amplitudes, the reference apparatus having terminal apparatus for receiving rebalance approximation sequence control signals for selectively controlling the signal amplitudes. The invention further includes null detecting apparatus for detecting the presence of a null, the null detecting apparatus being connected to the capacitive sensor apparatus and the reference apparatus.

REFERENCES:
patent: 2460773 (1949-02-01), Stimson
patent: 2519668 (1950-08-01), Konigsberg
patent: 2601176 (1952-06-01), Smith
patent: 2968181 (1961-01-01), Mittelmann
patent: 3361897 (1968-01-01), Rush
patent: 3463980 (1969-08-01), Cohn et al.
patent: 3523186 (1970-08-01), Cohn et al.
patent: 3797311 (1974-03-01), Blanchard et al.
patent: 3830090 (1974-08-01), Hersch et al.
patent: 3935741 (1976-02-01), Zinsmeyer et al.
patent: 4055995 (1977-11-01), Armstrong et al.
patent: 4079627 (1978-03-01), Gundlach
patent: 4083248 (1978-04-01), Maier
patent: 4090408 (1978-05-01), Hedrick
patent: 4114442 (1978-09-01), Pratt
patent: 4118772 (1978-10-01), Takada
patent: 4164146 (1979-08-01), DuVall et al.
patent: 4173893 (1979-11-01), Hedrick
patent: 4181958 (1980-01-01), Juengel et al.
patent: 4212064 (1980-07-01), Forsythe et al.
patent: 4215404 (1980-07-01), Bukhiyarov et al.
patent: 4229798 (1980-10-01), Rosie et al.
patent: 4258422 (1981-03-01), Dougherty et al.
patent: 4263652 (1981-04-01), Henrich
patent: 4266144 (1981-05-01), Bristol
patent: 4275382 (1981-06-01), Jannotta

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