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Image
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4
Non-Commercial Use
4
Category
Electricity Supply
4
Maker
Hartmann and Braun
1
Westinghouse Electric Corporation
1
Object type
collection
1
induction voltmeters
1
plug
1
voltmeters
1
Place
Frankfurt am Main
1
Frankfurt, Darmstadt, Hesse, Germany
1
Pittsburgh
1
Pittsburgh, Allegheny county, Pennsylvania, United States
1
Material
insulating materials
4
metal
3
copper alloy
2
glass
2
paint
2
paper
2
cadmium
1
iron
1
metals
1
nickel
1
Date
From
To
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Reyrolle metal-clad 5A plug to BS 196
1955
Westinghouse Induction Voltmeter
1905-1924
Hartmann and Braun voltmeter no.10222 scaled 0-650V
1890
Several hermetically sealed nickel cadmium cells
