"The Dielectrimeter, Empson Patent No.210220. Sole sales representatives Walker, Crossweller & Co., 54-58 Queen Elizabeth Street, London, SE1". (an induction coil and spark gap for measuring the breakdown strength of oil)
Details
- Category:
- Electricity and Magnetism
- Object Number:
- 1988-443
- type:
- dielectrimeter
- credit:
- British Railways Board Records Office
