Sumpner's portable standard volt- and wattmeter (an iron-cored electrodynamometer)
Sumpner's portable standard volt- and wattmeter (an iron-cored electrodynamometer), patent no.24605 of 1904, serial no.190W, calibration certificate dated 1911
Details
- Category:
- Electricity and Magnetism
- Object Number:
- 1987-430
- type:
- wattmeter
- credit:
- South Bank Polytechnic. Dept. of Electri
