The Milometer slide rule computer


One inscription on this celluloid rule reads “COPYRIGHT G. P. WILHELM 1917 / MFR. AND DISTRIBUTOR EDWARD C. MCKAY / CLEVELAND, OHIO / PATENT APPLIED FOR.” Another reads “THE MILOMETER.” Glenn Perrin Wilhelm (1889-1941) was an officer in the U.S. Army, and an authority on ballistics. He devised this slide rule-like computer for forward observers, to help them direct the indirect fire of machine guns and small arms.

Ref: Glenn P. Wilhelm, Machine Gun Fire Control (Cleveland: Edward C. McKay, 1917).

Date Made: 1917

Location: Currently not on view

Place Made: United States: Ohio, Cleveland

Related Event: World War I


See more items in: Medicine and Science: Chemistry, Celluloid, Military, Computers & Business Machines


Exhibition Location:

Data Source: National Museum of American History

Id Number: 2006.0098.1569Catalog Number: 2006.0098.1569Accession Number: 2006.0098

Object Name: slide rule computerslide rule

Physical Description: cellulose nitrate (overall material)Measurements: overall: 3.5 cm x 16.8 cm x .5 cm; 1 3/8 in x 6 5/8 in x 3/16 inoverall: 1 1/2 in x 6 5/8 in x 3/16 in; 3.81 cm x 16.8275 cm x .47625 cm


Record Id: nmah_1347423

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