Geometrical instruments – Straight-line light ray type – Celestial
Patent
1981-08-20
1983-11-08
Martin, Jr., William D.
Geometrical instruments
Straight-line light ray type
Celestial
33 1SA, G01C 100
Patent
active
044134231
ABSTRACT:
The device comprises a declination adjustable solar ray directed assembly straddling the rim of a circular segment, hinged on the polar axis of an equatorial mount. The circular segment has a holding means for positioning it on the rim of a time dial placed on the equatorial mount. Shoes are attached to the solar directed assembly and ride on the rim of the circular segment, or shoes are attached to a support stand for the equatorial mount and ride on the rim of the equatorial mount. The support stand has a leveling base with two pairs of adjustable legs and pivoted feet providing stiffness in mutually perpendicular planes while allowing for tilting adjustment in alternate planes during the leveling operation.
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patent: 205485 (1878-07-01), Holmes
patent: 538889 (1895-05-01), Arvidson
patent: 702354 (1902-06-01), Beal
patent: 1547940 (1925-07-01), Monney
patent: 2429754 (1947-10-01), Hagner
patent: 2483228 (1949-09-01), Palmer
patent: 2839833 (1958-06-01), Hagner
patent: 3066415 (1962-12-01), Jefferson
patent: 3940859 (1976-03-01), Troseth
patent: 4236313 (1980-12-01), Griffin, Jr.
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