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Scalamp electrostatic voltmeter

1960-1979

J White Kelvin patent multicellular voltmeter

circa 1897

dial multi-cellular electrostatic voltmeter

circa 1896

mirror reflecting electrostatic voltmeter

multi-cellular voltmeter

circa 1896

J White Sir W Thomson's patent electrostatic voltmeter

circa 1895

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, Bottomley & Baird Ltd, Scotland, 1909.

Kelvin, Bottomley & Baird Limited electrostatic voltmeter

1909

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

Electrostatic voltmeter made by Kelvin & James White Ltd

1904

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

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

electrostatic voltmeter

circa 1890