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Scalamp electrostatic voltmeter

1960-1979

J White Kelvin patent multicellular voltmeter

circa 1897

multi-cellular voltmeter

circa 1896

dial multi-cellular electrostatic voltmeter

circa 1896

J White Sir W Thomson's patent electrostatic voltmeter

circa 1895

mirror reflecting electrostatic voltmeter

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
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
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 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
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