Friden Model STW 10 Calculating Machine
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- Friden, Inc.
- This stepped drum full-keyboard electric non-printing calculating machine has a metal frame painted brownish gray (taupe) and ten columns of brown and gray plastic number keys, with a blank gray plastic zeroing key at the bottom of each column. Metal rods between columns of keys turn under the keyboard to indicate decimal places. A small brown and tan bar slides to the right to reset the decimal rods. The capabilities of the Friden STW-10 are quite similar to those of the earlier ST-10, although the exterior design and color are different. The model was introduced in 1949 and manufactured through 1966.
- On the right are two columns of function bars. On the left is a ten-digit register that indicates numbers entered for multiplication. Below it is a block of nine white digit keys, with a 0 bar below. These are surrounded by three levers and four function keys.
- Behind the number keys is a movable carriage with an 11-digit revolution register and a 20-digit result register. Taupe plastic buttons above the result register rotate to set up numbers. Ten numbered buttons under the revolution register are spaced between the digits. A zeroing knobs for the registers is on the top right of the carriage. All three registers have sliding decimal markers.
- The machine has four hard rubber feet. There is a rubber cord and a tan plastic cover. A mark on the bottom of the machine reads: S82 (/) STW 10. The original serial number next to the model number has been effaced. Marks on the back and side read: FRIDEN. A mark on the cover reads: Friden (/) AUTOMATIC CALCULATOR. A mark on a sticker on the bottom of the machine reads: FRIDEN, INC. (/) SAN LEANDRO, CALIFORNIA, U.S.A. A mark on the cord reads: SINGER.
- Compare MA.334379, MA.335419 and 1984.3079.04.
- Carl Holm, “Milestones in the Development of Friden.”
- Currently not on view
- Credit Line
- Gift of The Singer Company, Friden Division
- ca 1954
- ID Number
- accession number
- catalog number
- maker number
- Object Name
- calculating machine
- Physical Description
- metal (overall material)
- rubber (overall material)
- plastic (overall material)
- overall: 21.7 cm x 46 cm x 36.8 cm; 8 17/32 in x 18 1/8 in x 14 1/2 in
- place made
- United States: California, San Leandro
- See more items in
- Medicine and Science: Mathematics
- Calculating Machines
- Science & Mathematics
- National Museum of American History
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