Mechanical Accountant

Description
This key-driven adding machine has a black metal case, and seven columns of nine plastic or ceramic keys and one column of seven keys. The rightmost column of keys is white, with eighth fractions from 1/8 to 7/8. The two columns left of this are black with white digits. The next three columns left of this are white with black digits, and the two leftmost columns are black with white digits. Complementary digits are indicated on the keys. Results appear in a row of nine windows in back of the keyboard. The latest number entered appears in a row of eight windows behind this. A metal lever in front of the keys cancels an entry, but not the total. There is an opening for a zeroing crank, but no crank. The windows are covered with translucent plastic.
This is the earlier “simplex” model of the machine, which was designed to have numbers entered one digit at a time. The simultaneous operation of two columns where a carry is involved results in loss of the carry.
The machine is marked at the front: Mechanical Accountant (/) MODEL H. (/) MANUFACTURED BY (/) MECHANICAL ACCOUNTANT CO.,PROV.,R.I. (/) PATENTED JULY 30TH. 1901(/) FEB.10TH, 1903. (/) OTHER PATENTS PENDING. The tag is also stamped: DEC.15.’91. No serial number was found.
Joseph Abram Turck of Providence, Rhode Island, assigned three patents to the Mechanical Accountant Company. Turck then went on to work for Felt & Tarrant Manufacturing Company of Chicago.
Compare MA*371386.
References:
J. A. V. Turck, “Adding Machine,” U.S. Patent 631345, granted August 22, 1899.
J. A. V. Turck, “Calculating Machine,” U.S. Patent 679,348, granted July 30, 1901.
J. A. V. Turck, “Calculating-Machine,” U.S. Patent 720,086, granted February 10, 1903.
J. H. McCarthy, The American Digest of Business Machines, Chicago: American Exchange Service, 1924, p. 550.
Location
Currently not on view
Object Name
adding machine
date made
after 1903
maker
Mechanical Accountant Company
Physical Description
rubber (overall material)
metal (overall material)
cloth (overall material)
plastic (overall material)
Measurements
overall: 14 cm x 20.1 cm x 33.3 cm; 5 1/2 in x 7 29/32 in x 13 1/8 in
place made
United States: Rhode Island, Providence
ID Number
MA*323599
accession number
250163
catalog number
323599
subject
Mathematics
Science & Mathematics
Adding Machines
See more items in
Medicine and Science: Mathematics
Adding Machines
Data Source
National Museum of American History, Kenneth E. Behring Center
Credit Line
Gift of Victor Comptometer Corporation
Additional Media

Visitor Comments

Add a comment about this object

Submit a comment or ask a question about this object using the form below. Submissions are moderated and may receive a curator response. Please note that we cannot evaluate or appraise your personal artifacts. For other questions or general inquiries please visit our FAQ or contact page.

Personal information will not be shared or result in unsolicited e-mail. See our privacy policy.

Image CAPTCHA
Enter the characters shown in the image.