General Post Office Differential Line Detector

Made:
1910-1920 in Liverpool

General Post Office differential line detector, made by the Automatic Telephone Manufacturing Co. Ltd, c. 1910. Model number: RH461. In wood case with glass fronted dial. Used to detect the presence of a current of electricity and to measure its strength.

Details

Category:
Telecommunications
Object Number:
Y1969.55.3
Materials:
brass (copper, zinc alloy), glass, metal (unknown), wood (unidentified)
type:
galvanometer
taxonomy:
  • furnishing and equipment
  • measuring device - instrument
credit:
Gift of NW Telecomms G.P.O.
status:
Permanent collection

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