Elevation angle measuring device with apparatus for disabling th

Details Elevation angle measuring device with apparatus for disabling th Elevation angle measuring device with apparatus for disabling th

1983-11-21

1986-10-28

Westin, Edward P.

Radiant energy

Photocells; circuits and apparatus

Optical or pre-photocell system

33 1PT, 356152, G01B 1126

Patent

active

046200924

ABSTRACT:
An elevation angle measuring device is designed to compensate for a slight inclination of the device. A vertical hanging member having a slit is arranged such that the slit acts as a photoelectric passage mask for a detector when the device has an inclination angle substantially equal to zero. The device is disabled by the vertical hanging member when the inclination angle of the device is not substantially equal to zero.

REFERENCES:
patent: 4136955 (1979-01-01), Aeschlimann et al.
patent: 4318225 (1982-03-01), Jenkinson
patent: 4449191 (1984-05-01), Mehnert
patent: 4466189 (1984-08-01), Tobin, Jr.

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