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J White Sir W Thomson's patent electrostatic voltmeter

J White Sir W Thomson's patent electrostatic voltmeter

circa 1895
Scalamp electrostatic voltmeter

Scalamp electrostatic voltmeter

1960-1979
J White Kelvin patent multicellular voltmeter

J White Kelvin patent multicellular voltmeter

circa 1897
multi-cellular voltmeter

multi-cellular voltmeter

circa 1896
dial multi-cellular electrostatic voltmeter

dial multi-cellular electrostatic voltmeter

circa 1896
mirror reflecting electrostatic voltmeter

mirror reflecting electrostatic voltmeter

Electrostatic voltmeter

Electrostatic voltmeter

Kelvin's multicellular electrostatic voltmeter No.20517

Kelvin's multicellular electrostatic voltmeter No.20517

1913-1947
Quadrant electrometer, made by Philip Harris Ltd, Birmingham, c.1930-40 and used at Openshaw Technical College, Manchester.

Quadrant electrometer

circa 1935
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
voltmeter

Salford Electrical Instruments electrostatic voltmeter

1910
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
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 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