Radiant energy – Photocells; circuits and apparatus – Optical or pre-photocell system
Patent
1993-01-04
1994-12-13
Westin, Edward P.
Radiant energy
Photocells; circuits and apparatus
Optical or pre-photocell system
33366, 73517R, G01D 534
Patent
active
053731530
ABSTRACT:
An optoelectronic tilt detector (10 and 35) having a cavity (17) is provided. The cavity (17) has a sidewall (18), a tapered floor (19), and a tapered ceiling (20). The tapered floor (19) and the tapered ceiling (20) have a first passage (23) and a second passage (24) through which radiation such as light may pass. Housed within the cavity (17) is an opaque sphere (14). The opaque sphere (14) moves within the container (17) in accordance with the tilt of the cavity (17) to uncover either the first passage (23) or the second passage (24). The opaque sphere (14) may operate in conjunction with a light emitting device (12) and a light detector (13) to allow radiation to travel from the light emitting device (12) to the light detector (13) when the cavity (17) is tilted, thereby providing a measure of tilt.
REFERENCES:
patent: 4450353 (1984-05-01), Sjolund
patent: 4556799 (1985-12-01), Rolando
patent: 4972595 (1990-11-01), Shimamura et al.
patent: 5042158 (1991-08-01), Schmelzer
patent: 5202559 (1993-04-01), Durst
Howard Anton, "Calculus with Analytic Geometry", 1980, pp. 875-878.
Cumberledge William S.
Vowles David L.
Allen Stephone B.
Dover Rennie William
Motorola Inc.
Westin Edward P.
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