Frontlash Unit from the Bush Differential Analyzer


The steel shaft has a steel cylinder next to a thin rotating brass drum. A friction band goes around the drum and a planetary gear train links it to a steel disc. A brass end piece fits over the shaft and has an internal gear. The end piece comes off easily. This frontlash unit on the Bush differential analyzer compensated for the backlash in a given drive between the output shaft of the unit and input shaft of an adjacent unit.

A mark on the disc and end piece reads: 8.

Compare to 1983.3002.09, .10 and .11.

Date Made: ca 1930

Maker: Bush, Vannevar

Location: Currently not on view

Place Made: United States: Massachusetts, CambridgeUnited States: Massachusetts, Cambridge

Subject: Mathematics


See more items in: Medicine and Science: Mathematics, Mechanical Integrators and Analyzers, Science & Mathematics


Exhibition Location:

Credit Line: Gift of Wayne State University, College of Liberal Arts, Computation Laboratory

Data Source: National Museum of American History

Id Number: 1983.3002.04Nonaccession Number: 1983.3002Catalog Number: 1983.3002.04

Object Name: differential analyzer componentOther Terms: Frontlash Unit

Physical Description: metal (overall material)Measurements: overall: 7.6 cm x 32 cm x 9 19/32 in; 3 in x 12 19/32 in x 24.384 cm


Record Id: nmah_693235

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