Rude Star Finder (2102-D)

Description
This consists of a white plastic planisphere with the northern sky on one side and the southern on the other; nine clear plastic altitude-azimuth templates for use at different latitudes up to 5o north and south; a clear plastic meridian angle diagram; and a cardboard container. It is based on the Rude form, as modified in the early 1940s by Elmer Collins of the United States Hydrographic Office. It was published by the Hydrographic Office and sold for $4.00. The Hydrographic Office transferred it to the Smithsonian in 1957. The instrument bears the inscription "NO. 2102-D / STAR FINDER AND IDENTIFIER / PATENT NOS. 2304797, 2337545."
Ref: G. T. Rude, Star Finder and Identifier," U.S. patent #1,401,446
H. M. Jensen, et. al., "Navigational Instrument," U.S. patent #1,919,222
E. B. Collins, "Star Finder," U.S. patent #2,304,797
E. B. Collins, "Star Finder," U.S. patent #2,337,545
Nathaniel Bowditch, American Practical Navigator (Washington, D.C.: United States Hydrographic Office, 1962), pp. 586-589.
"Elmer B. Collins," Washington Post (2 October 1958), p. B2.
Location
Currently not on view
Object Name
star finder
date made
ca 1950
Measurements
overall: 8 in; 20.32 cm
ID Number
PH*315071.4
catalog number
315071.4
accession number
214422
maker number
2012-D
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Data Source
National Museum of American History, Kenneth E. Behring Center

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