Monroe Model K-16 Calculating Machine

Description:

The manual, full-keyboard non-printing modified stepped drum calculating machine has a metal frame painted black and a steel keyboard painted green. Eight columns of uniformly shaped black and white color-coded keys serve for data entry. At the bottom of each column is a red clearance key. Metal rods between the rows of keys are decimal markers. Three key stems are in a column to the right of the number keys. One clears the entire keyboard. The other two are set to determine whether or not the keyboard clears after each calculation (at least one of these keys looks like a replacement). A metal lever is right of the keyboard and a metal knob to the left. The operating crank on the right side rotates clockwise for addition and counterclockwise for subtraction.

The carriage behind the keyboard has a row of 16 black numeral dials for recording results, and a row of eight white numeral dials which serve as a revolution register. The revolution register, which has no carry, has black digits for addition and red ones for subtraction. Two thin metal rods between the windows for these registers carry decimal markers. The carriage shift crank is at the front of the machine. A knob for lifting the carriage is right of the result register, and a crank for zeroing dials on the carriage is on its right side. There are four rubber feet. A bell rings when the result passes through zero (as in over-division).

A mark on the front of the machine reads: MONROE. A mark on the back reads: MONROE (/) Calculating Machine Company (/) New York, U.S.A. The serial number, recorded on the bottom edge of the left side of the carriage, is 91928

Reference:

J. H. McCarthy, The Business Machines and Equipment Digest, 1928, pp. 9-29 to 9-33.

Date Made: 1927

Maker: Monroe Calculating Machine Company

Location: Currently not on view

Place Made: United States: New Jersey, Orange

Subject: Mathematics

Subject:

See more items in: Medicine and Science: Mathematics, Calculating Machines, Science & Mathematics

Exhibition:

Exhibition Location:

Credit Line: Gift of Walton G. Banks, Inc.

Data Source: National Museum of American History

Id Number: 1984.0682.05Catalog Number: 1984.0682.05Maker Number: 91928Accession Number: 1984.0682

Object Name: calculating machine

Physical Description: plastic (overall material)wood (overall material)aluminum (overall material)steel (overall material)Measurements: overall: 19.5 cm x 46 cm x 39 cm; 7 11/16 in x 18 1/8 in x 15 11/32 in

Guid: http://n2t.net/ark:/65665/ng49ca746a5-17a2-704b-e053-15f76fa0b4fa

Record Id: nmah_690572

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