Optical potentiometer

Details Optical potentiometer Optical potentiometer

1979-04-12

1981-08-18

Nelms, David C.

Radiant energy

Photocells; circuits and apparatus

Photocell controlled circuit

250229, G01J 132

Patent

active

042848857

ABSTRACT:
An optical potentiometer is disclosed having first and second variably light transmissive windows, a source of light mounted on one side of the windows and corresponding first and second light responsive devices mounted on the other side of the window in such a fashion that only one of the light responsive devices receives energizing light at a time, and a handle for moving first and second variable light transmissive windows past the corresponding first and second light responsive devices. A dwell period may be provided between the times when the first and second light responsive devices receive energizing light.

REFERENCES:
patent: 3171034 (1965-02-01), Tomasulo et al.
patent: 3194967 (1965-07-01), Mash
patent: 3246161 (1966-04-01), Matare et al.
patent: 3258601 (1966-06-01), Suleski
patent: 3358150 (1967-12-01), Summer
patent: 3414730 (1968-12-01), Nicolas
patent: 3539816 (1970-11-01), Chamberlin
patent: 3639769 (1972-02-01), Clark
patent: 3811047 (1974-05-01), Shragal
patent: 3859617 (1975-01-01), Oka et al.
patent: 3892961 (1975-07-01), Bachmann

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