Alphabetic Duplicating Key Punch 031

• Country
• United States of America (USA)

• Manufacturer / Brand
• IBM; Armonk, N.Y.

• Year
• 1933 ?

• Category
• Signal Processing and Computing

• Radiomuseum.org ID
• 355858

• Picture
• Schematics

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Click on the schematic thumbnail to request the schematic as a free document.

• Wave bands
• - without

• Power type and voltage
• Alternating Current supply (AC) / 110 (60 cps) 220 (50 Herz) Volt

• Loudspeaker
• - - No sound reproduction output.

• Material
• Metal case

• from Radiomuseum.org
• Model: Alphabetic Duplicating Key Punch 031 - IBM; Armonk, N.Y.

• Shape
• Boatanchor (heavy military or commercial set >20 kg).

• Dimensions (WHD)
• 40 x 38.25 x 27.25 inch / 1016 x 972 x 692 mm

• Notes

• columbia.edu/cu/computinghistory/oldpunch.html:
  The IBM Type 31 Alphabetical Duplicating Punch, a motor-driven key punch from 1934, with a typewriter-like keyboard and a separate numeric keypad.

  This model (current with the release of the IBM 405 accounting machine) used the new (1928) standard 12 rows x 80 columns cards and was almost certainly in use at the statistical and astronomical laboratories, BASR, and elsewhere at Columbia before the introduction of the 024 and 026 models in 1949 - with tubes.
  The alphabetic keyboard is similar to a conventional manual type­writer except that the shift, tab, and backspace keys were eliminated, and a skip, release, stacker and '1' key were provided" (IBM History Archive).

• Mentioned in
• columbia.edu/cu/computinghistory/ibm031

• Literature/Schematics (1)
• computerhistory.org/collections/catalog/102631023

• Author
• Model page created by Heribert Jung. See "Data change" for further contributors.

• Other Models

• Here you find 20 models, 20 with images and 14 with schematics for wireless sets etc. In French: TSF for Télégraphie sans fil.
  All listed radios etc. from IBM; Armonk, N.Y.