Photoelectric vertical sensor with pressure compensation means

Details Photoelectric vertical sensor with pressure compensation means Photoelectric vertical sensor with pressure compensation means

1990-09-10

1992-05-05

Nelms, David C.

Radiant energy

Photocells; circuits and apparatus

Optical or pre-photocell system

33366, G01D 534

Patent

active

051110393

ABSTRACT:
In a vertical sensor, a container encases a light absorbing liquid. An air bubble is formed within the light absorbing liquid and is displaced in the event that the container deviates from a vertical indicating position. A light source and a photoelectric detector are arranged on opposite sides of the container and form a light barrier which responds to migration of the air bubble as a result of a deviation of the container from the vertical indicating position. At least one shell portion of the container is of a flexible nature for pressure compensation.

REFERENCES:
patent: 3281947 (1966-11-01), McDowell
patent: 3813556 (1974-05-01), Beer et al.
patent: 4154000 (1979-05-01), Kramer

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