Radiant energy – Photocells; circuits and apparatus – Optical or pre-photocell system
Patent
1993-02-08
1994-07-19
Westin, Edward P.
Radiant energy
Photocells; circuits and apparatus
Optical or pre-photocell system
25023113, G01D 534
Patent
active
053311531
ABSTRACT:
A gravity orientation device comprises a cylindrical casing, a shaft rotatably mounted in the casing along the longitudinal axis thereof and having pointed ends contacting bearing surfaces located in the ends of the casing, an encoder mounted within the casing and having a fixed portion secured to the casing and a rotary portion secured to the shaft, and a weight pendulum mounted on the shaft for rotation around the shaft under the influence of gravity.
REFERENCES:
patent: 4101882 (1978-07-01), Kramer
patent: 4664519 (1987-05-01), Hullein et al.
patent: 5134471 (1992-07-01), Gendron et al.
Gendron Alain
Senecal Pierre
Davenport T.
Noranda Inc.
Westin Edward P.
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