Optics: measuring and testing – Angle measuring or angular axial alignment – Apex of angle at observing or detecting station
Patent
1979-06-07
1982-07-13
Rosenberger, R. A.
Optics: measuring and testing
Angle measuring or angular axial alignment
Apex of angle at observing or detecting station
356140, 250231SE, 250237G, G01C 100
Patent
active
043391982
ABSTRACT:
The combination with a sextant embodying an index mirror rotatable about a predetermined axis to bring a sighted object into juxtaposition with the line of sight of the optical system at the center of the horizontal mirror of an arcuate informational grating concentric with the axis of rotation of the index mirror and an index arm rotatable in consonance with the index mirror so that its distal end travels along the informational grating, a reference grating at the distal end of the index arm concentric with the information grating, a light-emitting diode at the proximal end of the index arm arranged to project a beam through the reference grating at the distal end of the arm onto the informational grating and a phase detector arranged at the proximal end of the index arm to receive the beam reflected from the conjuncted gratings. There is an index lever for rotating the index mirror and index arm in unison and a friction element at the distal end of the index lever for positioning it at a predetermined position.
REFERENCES:
patent: 2338325 (1944-01-01), Friar
patent: 2463649 (1949-03-01), Sheffield
patent: 3524067 (1970-08-01), West
patent: 3531650 (1970-09-01), Cronin
patent: 3752591 (1973-08-01), Feldman
patent: 3770970 (1973-11-01), Trump
patent: 3842261 (1974-10-01), MacGovern et al.
patent: 3968570 (1976-07-01), Leuchter
patent: 4101882 (1978-07-01), Kramer
Brown Donald
Celenav Industries, Inc.
Rosenberger R. A.
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