Mercury treadle for detecting the arrival of trains
Mercury treadle, for detecting the arrival of trains, mounted on length of rail, 'RA' insulated pattern complete with plunger inserting tool, by Siemens General Electric, c. 1930.
Details
- Category:
- Signalling & Telecommunications
- Object Number:
- 1964-277/5
- Materials:
- wood (unidentified) and metal (unknown)
- type:
- mercury treadle
- credit:
- S.G.E. Signals Ltd.
