Wall telephone with battery box, 1880-1940

Made:
1880-1940 in Unknown place
Wall telephone with battery box, Delville transmitter and magneto calling, 1880-1940.
      
      Early telephones used a Wall telephone with battery box, Delville transmitter and magneto calling, 1880-1940.
      
      Early telephones used a Wall telephone with battery box, Delville transmitter and magneto calling, 1880-1940.
      
      Early telephones used a

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Wall telephone with battery box, Delville transmitter and magneto calling, 1880-1940. Early telephones used a
Science Museum Group Collection
© The Board of Trustees of the Science Museum

Wall telephone with battery box, Delville transmitter and magneto calling, 1880-1940. Early telephones used a
Science Museum Group Collection
© The Board of Trustees of the Science Museum

Wall telephone with battery box, Delville transmitter and magneto calling, 1880-1940. Early telephones used a
Science Museum Group Collection
© The Board of Trustees of the Science Museum

Wall telephone with battery box, with Delville transmitter and magneto calling, unknown maker, 1880-1940.

Wall telephone with battery box, Delville transmitter and magneto calling, unknown maker, 1880-1940.

Early telephones used batteries for producing the speech currents and a hand-cranked magneto for generating the alternating current needed to ring the bells. To make a call the caller turned the magneto a few times and then lifted the handset. The operator connected the call manually using cords and plugs at the switchboard. At the end of the call both users turned their magnetos again to signal to the operator that they had finished. This was called 'ringing off'.

Details

Category:
Telecommunications
Object Number:
1953-103
Materials:
copper (alloy), metal (unknown), plastic (unidentified) and wood (unidentified)
type:
telephone
taxonomy:
  • component - object
credit:
Donated by the Institution of Electrical Engineers