American Adding Machine, Model 0
date: label: date made
content: 1916
name: label: maker
content: American Can Company Adding Machine Division
notes: label: Description
content: This lever-set non-printing adding machine has an etched steel case, painted black and resting on four rubber feet. Seven levers move in circular arcs between slots in the case. The case is painted along the edges of the slots with digits from 0 to 9 (large and in black and white) and 9 to 0 (small and in red). The large digits are used in addition, the small ones in subtraction. The cover has a corrugation or depression for each digit. Digits are set by placing the index finger in the corresponding depression and raising the lever by the thumb until it is stopped by the finger. They are entered by moving down a metal handle with a wooden knob on the right side. If no number has been entered, moving the knob zeros the machine. The result appears in seven windows above the levers. Another handle on the right side zeros digits set incorrectly.
label: Description
content: The machine is marked on a plaque attached to the front: AMERICAN (/) ADDING MACHINE (/) AMERICAN CAN COMPANY (/) ADDING MACHINE DIVISION (/) CHICAGO, ILL. No 23096. It is also marked there: PAT. AUG. 27, 1912 (/) OTHER PATS. PEND.
label: Description
content: Compare MA.323606.
label: Description
content: By 1924, American adding machines were made by the American Adding Machine Company of Chicago.
label: Description
content: Reference:
label: Description
content: J. H. McCarthy, <I>The American Digest of Business Machines</I>, Chicago: American Exchange Service, 1924, p. 27, 518.
label: Location
content: Currently not on view
place: label: place made
content: United States: Illinois, Chicago
topic: label: Subject
content: Mathematics
setName: label: See more items in
content: Medicine and Science: Mathematics
label: See more items in
content: Adding Machines
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content: Science & Mathematics
creditLine: label: Credit Line
content: Gift of Colonial Life Insurance Company of America
dataSource: label: Data Source
content: National Museum of American History
identifier: label: ID Number
content: MA.333921
label: accession number
content: 304369
label: maker number
content: 23096
label: catalog number
content: 333921
objectType: label: Object Name
content: adding machine
physicalDescription: label: Physical Description
content: rubber (overall material)
label: Physical Description
content: steel (overall material)
label: Physical Description
content: wood (overall material)
label: Physical Description
content: aluminum (overall material)
label: Measurements
content: overall: 23.5 cm x 20.4 cm x 24.2 cm; 9 1/4 in x 8 1/32 in x 9 17/32 in