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.
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