CHM Revolution

Date Introduced

1915 ca.

Photographer

Richards, Mark

Dimensions

6 3/4 x 18 x 13 1/4 in.

Manufacturer

Monroe Calculating Machine Company

Credit Line

Gift of Warren J. Buck and Arthur Milinowski

Copyright Owner

© Mark Richards

Location

United States

Keywords

Bay Area; Rotary calculator; Moving carriage; Monroe, Jay R.; Baldwin, Frank S.; Mechanical calculation

Object ID

X592.85

Frank Baldwin invented the moving carriage that dominated technical calculator design for decades. An architect by profession, he held patents in several unrelated fields.