Optics: measuring and testing – Angle measuring or angular axial alignment – Apex of angle at observing or detecting station
Patent
1979-06-18
1981-10-13
Punter, William H.
Optics: measuring and testing
Angle measuring or angular axial alignment
Apex of angle at observing or detecting station
350 33, 356146, G01C 100, G01C 114, G02B 2304
Patent
active
042945410
ABSTRACT:
An instrument having an annular body and a pair of independently and selectively-adjustable periscopes for transmitting the superimposed images of two reference stars (or other selected celestial objects) to a viewer for the purpose of directing orientation of the instrument so that its central axis will be parallel with the polar axis and an identifiable point on the perimeter of its scaled annular body will be directed towards Aries. From such a single sighting, the user obtains nearly all of the information required to compute his own longitude and latitude, the only other information being readily obtainable from an almanac and a timepiece.
REFERENCES:
patent: 914754 (1909-03-01), Saegmuller
patent: 2316466 (1943-04-01), Storer
patent: 2527189 (1950-10-01), Kittelson
patent: 2566312 (1951-09-01), Cable
patent: 3046830 (1962-07-01), Pierce et al.
patent: 3207025 (1965-09-01), MacDonald
patent: 4083636 (1978-04-01), Owen
Herrick, S., "Instrumental Solution in Celestial Navigation", Navigation, vol. 1, 6-1946, pp. 22-27.
Dulin Jacques M.
Punter William H.
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