Siemans polarized relay, 1890.
Details
- Category:
- Electricity Supply
- Object Number:
- Y1978.20.4
- Materials:
- brass (copper, zinc alloy), copper (alloy), metal (unknown), wood (unidentified) and glass
- Measurements:
-
overall: 140 mm x 105 mm x 125 mm, 80 mm,
- type:
- relay
- credit:
- Gift of Mr Stewart