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3
Non-Commercial Use
3
Category
Electricity Supply
3
Maker
Hartmann and Braun
1
Westinghouse Electric Corporation
1
Object type
induction voltmeters
1
voltmeters
1
Place
Frankfurt am Main
1
Pittsburgh
1
Material
insulating materials
3
copper alloy
2
glass
2
metal
2
paint
2
iron
1
metals
1
paper
1
rubber
1
Date
From
To
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Hartmann and Braun voltmeter no.10222 scaled 0-650
Electricity Supply
1890
Reyrolle metal-clad 5A plug to BS 196, c.1955 with
Electricity Supply
1955
Westinghouse Induction Voltmeter, no. 303720, 45-6
Electricity Supply
1905-1924
