Sound Velocity Corrector, A Mathematical Chart
date: label: date made
content: 1945
name: label: maker
content: G. Felsenthal & Sons, Inc.
notes: label: Description
content: This device assists in calculations of changes in the range of a gun because of meteorological conditions, particularly wind speed and temperature. A rotating disc and pointer attached to the plastic base have the scales required to correct for wind speed. A scale toward the bottom of the base gives the temperature correction. Both of these corrections are in percentages of the range. Summing them gives the total meteorological correction as a percentage of the range. One then can use a range correction chart to find the actual range correction.
label: Description
content: A mark on the front of the instrument reads: Signal Corps U. S. Army (/) SOUND VELOCITY CORRECTOR PT-62/TSS-1 (/) Order No. 3531-CEGSA-45 G. FELSENTHAL & SONS - CHICAGO.
label: Description
content: The instrument was designed and made for the United States Army by G. Felsenthal & Sons of Chicago in 1945. It had Felsenthal designation FAS-2.
label: Description
content: For a related range correction chart, see 1977.1141.43.
label: Description
content: Reference:
label: Description
content: Accession file.
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
label: See more items in
content: Mathematical Charts and Tables
label: See more items in
content: Military
label: See more items in
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: 1977.1141.42
label: catalog number
content: 336426
label: accession number
content: 1977.1141
objectType: label: Object Name
content: calculating disc & chart
label: Object Name
content: chart
physicalDescription: label: Physical Description
content: plastic (overall material)
label: Measurements
content: overall: .1 cm x 26.5 cm x 20.2 cm; 1/32 in x 10 7/16 in x 7 15/16 in