Tank Range Card
date: label: date made
content: 1955
name: label: maker
content: G. Felsenthal & Sons, Inc.
notes: label: Description
content: This chart, drawn on a rigid white plastic sheet, has five equally spaced concentric circles, each divided into eight equal sections by lines through the center of the circle. The outer circle is divided into 64 equal segments, which are numbered counterclockwise from 0 to 32 on the left half of the circle. On the right half, segments are numbered from 0 at the bottom counterclockwise to 30 at the top, and also from (34) to (64).
label: Description
content: A mark at the bottom left reads: CARD, TANK RANGE (/) 8724207. A mark on the left top reads: HUNDREDS OF MILS. There are 6400 mils in a circle of 360 degrees angular measure.
label: Description
content: The object comes from the Felsenthal Collection of computing devices. According to the accession file it was made by Felsenthal for the U.S. Army in 1955, and had Felsenthal designation FA0-51. It may have been used by the tank gunner to lay his gun on target, before the availability of electronic or laser sighting.
label: Description
content: Reference:
label: Description
content: Accession file 1977.1141.
label: Location
content: Currently not on view
place: label: place made
content: United States: Illinois, Chicago
topic: label: Subject
content: Mathematics
setName: label: See more items in
content: Medicine and Science: Mathematics
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content: Mathematical Charts and Tables
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content: Military
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content: Plotting Boards
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content: Science & Mathematics
creditLine: label: Credit Line
content: Gift of Ben Wharton Rau and Margery Felsenthal Rau
dataSource: label: Data Source
content: National Museum of American History
identifier: label: ID Number
content: 1977.1141.06
label: catalog number
content: 336390
label: accession number
content: 1977.1141
objectType: label: Object Name
content: chart
physicalDescription: label: Physical Description
content: plastic (overall material)
label: Measurements
content: overall: .4 cm x 28 cm x 28 cm; 5/32 in x 11 1/32 in x 11 1/32 in