Measuring and testing – Volume or rate of flow – Using differential pressure
Patent
1984-07-24
1986-01-28
Goldstein, Herbert
Measuring and testing
Volume or rate of flow
Using differential pressure
2502221, 250577, G01F 126, G01N 2184
Patent
active
045663378
ABSTRACT:
An opto-electronic position sensing system comprising a series of radiation sources, a series of radiation detectors, a moveable member having a range of movement over which it controls irradiation of various ones of said detectors by various ones of said sources according to the position of said member, each detector being adapted to produce an analog signal which varies from a minimum to a maximum with movement of the said member over a corresponding parts of its range in such a manner that the output signal of at least two of said detectors varies with movement of said member whatever its position in the said range of movement, and first means which determine the position of the member by digital analysis of outputs from the detectors and second means which subsequently better determine the position of the member by analog analysis of output from those detectors identified by the first means as indicating the position of the member.
REFERENCES:
patent: 2503091 (1950-04-01), Brooke, Jr. et al.
patent: 2882520 (1959-04-01), Hess
patent: 3582662 (1971-06-01), Soika
patent: 3699560 (1972-10-01), Meunier et al.
patent: 4084426 (1978-04-01), Gales
patent: 4200806 (1980-04-01), Walker et al.
patent: 4335618 (1982-06-01), Bucsky et al.
G. A. Platon Limited
Goldstein Herbert
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