Rogers-Bond Comparator measuring bar
notes: label: Description
content: This standard measuring bar was from Pratt & Whitney Inc. It is nearly 40 inches long and has spaced inserts for inch and millimeter scales. It is inscribed with the words, “George M. Bond July 1894” and “Standardized at 62 Degrees F.” It is enclosed in a wooden case. This measuring bar pairs with the Rogers-Bond Universal Comparator, a tool also built by Pratt & Whitney Inc. The comparator was used for the measurement of objects and comparisons of standards of length. This measuring bar worked to calibrate the comparator by providing reference for standards of length.
label: Location
content: Currently not on view
setName: label: See more items in
content: Work and Industry: Mechanical and Civil Engineering
creditLine: label: Credit Line
content: Pratt & Whitney Inc.
dataSource: label: Data Source
content: National Museum of American History
identifier: label: ID Number
content: MC.330521
label: catalog number
content: 330521
label: accession number
content: 293485
objectType: label: Object Name
content: Measurement Standard, Bar
label: Object Name
content: Measuring Machine Bar
physicalDescription: label: Measurements
content: case: 3 1/4 in x 44 in x 1 3/4 in; 8.255 cm x 111.76 cm x 4.445 cm
label: Measurements
content: measuring bar: 40 in; 101.6 cm