Telegraph key with buzzer

ATM, Automatic Telephone Manufacturing

  • Year
  • 1916
  • Category
  • Morse-Equipment & TTY, RTTY, TDD etc.
  • Radiomuseum.org ID
  • 199682
    • alternative name: Automatic T.M.(GB)

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

 Technical Specifications

  • Wave bands
  • - without
  • Power type and voltage
  • Storage and/or dry batteries
  • Loudspeaker
  • - - No sound reproduction output.
  • Material
  • Various materials
  • from Radiomuseum.org
  • Model: Telegraph key with buzzer - ATM, Automatic Telephone
  • Shape
  • Tablemodel, with any shape - general.
  • Dimensions (WHD)
  • 165 x 85 x 137 mm / 6.5 x 3.3 x 5.4 inch
  • Notes
  • A.T.M. Co. Ltd. Telegraph key with buzzer.
    Mechanical parts made of brass on a wooden base. Buzzer coils have 2× 22 Ω.

    Also Siemens Brothers & Co. Ltd. and Silvertown, London as a manufacturer known.

  • Net weight (2.2 lb = 1 kg)
  • 1.2 kg / 2 lb 10.3 oz (2.643 lb)
  • Author
  • Model page created by Bernd P. Kieck. See "Data change" for further contributors.

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