Wooden Box Model Comptometer
Wooden Box Model Comptometer
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- Description
- This key-driven non-printing adding machine has a wooden case and eight columns of color-coded plastic keys. The keys are black and white, with complementary digits indicated in red. It is a relatively late example of a Comptometer with a wooden, rather than a metal, case.
- There is a spring around each key stem, and the stems become progressively longer as the digits are larger. Eight subtraction levers are in front of the keys. Eight decimal markers are attached to a metal plate, painted black, which is in front of these. A row of nine windows in the plate reveals the number wheels. Hence the machine can have eight-digit numbers entered and compute nine-digit totals. The zeroing mechanism is a knob and lever on the right side.
- The serial number, stamped on the front of the machine under the decimal markers, is 5765. A metal tag attached to the back of the machine is marked: TRADE COMPTOMETER MARK (/) PAT’D (/) JUL.19.87 JUN. 11. 89. (/) OCT.11.87 NOV.25.90 (/) JAN.8.89 DEC.15.91. (/) SEP.22.96 (/) Felt & Tarrant Mfg. Co. (/) CHICAGO.
- Compare to MA.323650.
- Location
- Currently not on view
- Object Name
- adding machine
- date made
- ca 1906
- maker
- Felt & Tarrant Manufacturing Company
- place made
- United States: Illinois, Chicago
- Physical Description
- plastic (overall material)
- wood (overall material)
- metal (overall material)
- Measurements
- overall: 13.4 cm x 20.4 cm x 36.3 cm; 5 9/32 in x 8 1/32 in x 14 9/32 in
- ID Number
- 1987.0107.04
- catalog number
- 1987.0107.04
- maker number
- 5765
- accession number
- 1987.0107
- subject
- Mathematics
- See more items in
- Medicine and Science: Mathematics
- Adding Machines
- Science & Mathematics
- Data Source
- National Museum of American History
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