Rude Star Finder (2102-D)
date: label: date made
content: ca 1950
notes: label: Description
content: 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 5 degrees 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 (1878-1958) 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. An inscription reads "NO. 2102-D / STAR FINDER AND IDENTIFIER / PATENT NOS. 2304797, 2337545."
label: Description
content: Ref: Gilbert T. Rude, Star Finder and Identifier," U.S. patent #1,401,446
label: Description
content: H. M. Jensen, et. al., "Navigational Instrument," U.S. patent #1,919,222
label: Description
content: Elmer B. Collins, "Star Finder," U.S. patent 2,304,797 (Dec. 15, 1942).
label: Description
content: Elmer B. Collins, “Star Finder,” U.S. Patent 2,337,545 (Dec. 28, 1943).
label: Description
content: Elmer B. Collins, "Star Finder," U.S. patent #2,337,545
label: Description
content: Nathaniel Bowditch, <i>American Practical Navigator</i> (Washington, D.C.: United States Hydrographic Office, 1962), pp. 586-589.
label: Description
content: "Elmer B. Collins," <i>Washington Post</i> (2 October 1958), p. B2.
label: Location
content: Currently not on view
setName: label: See more items in
content: Medicine and Science: Physical Sciences
label: See more items in
content: Navigation
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content: Measuring & Mapping
dataSource: label: Data Source
content: National Museum of American History
identifier: label: ID Number
content: PH.315071.4
label: catalog number
content: 315071.4
label: accession number
content: 214422
label: maker number
content: 2012-D
objectType: label: Object Name
content: star finder
physicalDescription: label: Measurements
content: overall: 8 in; 20.32 cm
label: Measurements
content: overall: 10 in x 10 in x 3/4 in; 25.4 cm x 25.4 cm x 1.905 cm