Geometrical instruments – Area integrators – Electrical
Patent
1974-06-26
1976-02-24
Martin, Jr., William D.
Geometrical instruments
Area integrators
Electrical
33375, 33388, G01C 928
Patent
active
039395715
ABSTRACT:
An aiming bar is inserted through the aiming slit of an aircraft visual approach slope indicator housing and secured at its inner end to a cross bar in front of a horizontal row of landing lights so that the aiming bar assumes the vertical angle of the upwardly directed light beam. A pivot bar is mounted on the aiming bar and aligned with an angle plate mounted on the aiming bar to indicate the slope of the approach indicator.
The alignment assembly is calibrated using a T-shaped calibration bar positioned in a rigid carrying case. A pin at each end of the T-cross arm and at the remote end of the T-leg rests on respective mounting pedestals whereby the calibration bar is held in a raised position and leveled by adjustment of at least two of the pins to provide a horizontal platform for mounting the alignment assembly. The aiming bar is horizontally mounted on the T-leg and the pivot bar is set to a horizontal angle plate reading. If the pivot bar is level, the operator is assured that the alignment assembly is correctly calibrated.
REFERENCES:
patent: 926770 (1909-07-01), Roller
patent: 2097849 (1937-11-01), Torbert
Martin, Jr. William D.
West Tech Systems, Inc.
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