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Scalamp electrostatic voltmeter

1960-1979

J White Kelvin patent multicellular voltmeter

circa 1897

J White Sir W Thomson's patent electrostatic voltmeter

circa 1895

mirror reflecting electrostatic voltmeter

multi-cellular voltmeter

circa 1896

dial multi-cellular electrostatic voltmeter

circa 1896
Electrostatic voltmeter for high voltages, made by Abraham & Villard, after the model made by J Carpenter of 1757,in Paris, c 1902. Cast iron frame with instrument and one sphere mounted on an insulator and adjustable sphere mounted on second movable insulator.

electrostatic voltmeter

circa 1902
Quadrant electrometer, made by Philip Harris Ltd, Birmingham, c.1930-40 and used at Openshaw Technical College, Manchester.

Quadrant electrometer

circa 1935
Electrostatic voltmeter made by Kelvin & James White Ltd, Glasgow, 1904.

Electrostatic voltmeter made by Kelvin & James White Ltd

1904
Electrostatic voltmeter made by Kelvin, Bottomley & Baird Ltd, Scotland, 1909.

Kelvin, Bottomley & Baird Limited electrostatic voltmeter

1909
electrostatic voltmeter, Becker & Co, c 1890. Gold leaf electroscope. Glass front and rear to the box.

electrostatic voltmeter

circa 1890
voltmeter

Salford Electrical Instruments electrostatic voltmeter

1910
Electrostatic voltmeter made by Siemes & Halske AG, Germany, 1950.

Electrostatic voltmeter made by Siemes & Halske AG

1950
Electrostatic voltmeter made by Kelvin & James White Ltd, 1900.

Electrostatic voltmeter made by Kelvin & James White Ltd

1900
Electrostatic voltmeter, made by P & B, England, 1940.

Electrostatic voltmeter

1940