Geometrical instruments – Indicator of direction of force traversing natural media – Level or plumb – terrestrial gravitation responsive
Patent
1976-11-23
1978-04-18
Phillips, Charles E.
Geometrical instruments
Indicator of direction of force traversing natural media
Level or plumb, terrestrial gravitation responsive
33391, G01C 900
Patent
active
040843289
ABSTRACT:
A method of adjustment, by use of a gravity-operated angle measuring device, of the azimuth and/or elevation of the major axis of a light fixture having a normal operating position located at an inaccessible height, as on a tower holding runway approach lights. The method includes lowering the tower by rotating it about its base to a position wherein the light fixtures are accessible; measuring the vertical angle of the tower axis in the lowered position; adjusting the fixture to the desired angle relative to the tower axis by attaching the measuring device directly to the fixture; elevating the tower with the device still attached to the fixture; locking the angle shown on the device in the elevated position of the tower; again lowering the tower to read the angle locked on the device; and making any necessary adjustment of the light fixture axis relative to the tower axis so that the axis of a beam emanating from the fixture is directed at a predetermined azimuth and elevation.
REFERENCES:
patent: 532515 (1895-01-01), Woodworth
patent: 1120737 (1914-12-01), Nielsen
patent: 2326518 (1943-08-01), Beatty
patent: 2593141 (1952-04-01), Hagner
patent: 2786279 (1957-03-01), Hughes
patent: 2877561 (1959-03-01), Morse
patent: 3336679 (1967-08-01), Davis
patent: 3429052 (1969-02-01), Hembd et al.
Jaquith Industries, Inc.
McGuire Charles S.
Phillips Charles E.
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