General Post Office Differential Line Detector

Made:
1910-1920 in Liverpool
General Post Office Differential Line Detector

General Post Office Differential Line Detector
Science Museum Group
© The Board of Trustees of the Science Musuem

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) and wood (unidentified)
type:
galvanometer
taxonomy:
  • furnishing and equipment
  • measuring device - instrument
credit:
Gift of NW Telecomms G.P.O.