Pressure-electrical signal conversion means

Details Pressure-electrical signal conversion means Pressure-electrical signal conversion means

1977-02-24

1978-10-24

Nelms, David C.

Radiant energy

Photocells; circuits and apparatus

Optical or pre-photocell system

250211K, G01D 534

Patent

active

041223373

ABSTRACT:
The present invention is a pressure-electrical signal conversion means comprising a diaphragm assembly which is moved in accordance with the difference of pressure between two compartments therein, illumination means able to direct light in a band onto a photosensitive unit which includes two elements so disposed that when any particular band of the photosensitive area is illuminated the illuminated area of one element is greater than that of the other, this photosensitive element produces an output proportional to the relative size of the illuminated areas of these elements, the photosensitive unit and illumination means being movable relative to one another in proportion to the movement of the diaphragm.

REFERENCES:
patent: 3159750 (1964-12-01), Kazan
patent: 3191440 (1965-06-01), Miller
patent: 3258601 (1966-06-01), Suleski
patent: 3612881 (1971-10-01), King
patent: 3624404 (1971-11-01), Hines

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