Mirror galvanometer for the transatlantic telegraph, 1858

Electricity and Magnetism

1858

Mirror galvanometer invented by Lord Kelvin and used at the Newfoundland end of the 1858 transatlantic cable, made by James White, Glasgow, Scotland, 1858.

Thomson's Mirror Galvanometer, 1858

Telecommunications

1858

(Lord Kelvin) Thomson's mirror galvanometer (land type) used at Valentia Island end of the original Atlantic cable, made by White and Barr, Glasgow, Scotland, 1858.

Thomson's Mirror Marine Galvanometer, 1858

Electricity and Magnetism

1858

(Lord Kelvin) Thomson's marine mirror galvanometer, made by White & Barr, Glasgow, Scotland, 1858

Vertical galvanometer, 1830-1870

Electricity Supply

1830-1870

Vertical galvanometer, invented by Sir William Cooke, unknown maker, British, 1830-1870

Henley needle galvanometer, 1855-1860

Telecommunications

1855-1860

Henley needle galvanometer used in receiving the first telegraphic message transmitted across the Atlantic Ocean, made by W T Henley, British, around 1858.

William Thomson's marine mirror galvanometer, 1850-1900

Telecommunications

1854

William Thomson's marine mirror galvanometer, made by Siemens and Halske, Berlin, Germany, 1850-1900.

Galvanometer from prototype Cox selenium-cell magnifier equipment, 1910-1920

Telecommunications

1910-1920

Galvanometer from prototype Cox selenium-cell magnifier equipment, possibly made by Kenwrick Cecil Cox, 1910-1920

Thomson mirror speaking galvanometer, 1858

Telecommunications

1858

Thomson mirror speaking galvanometer, made by Elliott Brothers, Strand, London, England, 1858

Moving magnet galvanometer with dial inscribed "Greenwich Mean Time", 1843-1897

Time Measurement

1843-1897

Moving magnet galvanometer with dial inscribed "Greenwich Mean Time", made by Hunt and Roskell Limited, Clerkenwell, London, England, 1843-1897. The face of the instrument reads: 'This needle is deflected precisely at each hour, Hunt & Roskell Ltd, jewellers and watchmakers'

Lord Kelvin's 'ironclad' marine galvanometer, 1865-1866

Electricity and Magnetism

1865-1866

(Lord Kelvin) Thomson's 'Ironclad' marine galvanometer, made by James White, Glasgow, Scotland, 1865-1866. Used on board the 'Great Eastern' in the Atlantic Cable expedition of 1866.

Lord Kelvin's mirror galvanometer with lamp and stand, 1858.

Telecommunications

1858

Thomson mirror speaking galvanometer with lamp and stand, made by Elliott Brothers, Strand, London, 1858

Weston model 440 galvanometer

Electricity and Magnetism

1926

Weston model 440 galvanometer, No.2708, 30-0-30

H. Tinsley & Co mirror galvanometer

Electricity and Magnetism

c.1910

Mirror galvanometer, made by H. Tinsley & Co., London.

Ballistic reflecting galvanometer, London, England, 1920-1955

Laboratory Medicine

1920-1955

Aperiodic ballistic reflecting galvanometer, brass, by H. Tinsley and Co., serial No.577, NPL=39252 (certificate) & paper label E2137 London, 1920-1955

Unipivot Galvanometer

Telecommunications

Unipivot galvanometer 25A, made by the Cambridge Instrument Co. Ltd in around 1960.

Sullivan patent portable galvanometer

Electricity and Magnetism

1898-1913

Sullivan patent portable galvanometer

Galvanometer, England, 1921

Clinical Diagnosis

1921

Galvanometer string, brass, in wooden case, made by Cambridge Instrument Co., English, 1921

Galvanometer, British Insulated and Helsby Cables Limited

Electricity and Magnetism

c1902-1925

Galvanometer for testing electric cables, British Insulated and Helsby Cables Limited, Prescot, Lancashire.

Small galvanometer.

Time Measurement

1888

Small galvanometer for use with chronoscope, made by Hipp, Neuchâtel, 1888

W. G. Pye string galvanometer

Electricity and Magnetism

1910

String galvanometer, set on small wood base. Manufactured by W. G. Pye & Co. Ltd

Telegraph Line Tester

Telecommunications

1880-1920

C K Varley telegraph line testing set in wooden case.

Galvanometer in frame

Electricity and Magnetism

1900

moving coil galvanometer, in wooden frame with brass dial. object is covered under a glass dome manufactured by W. G. Pye & Co. Ltd

Zernike galvanometer, by Kipp und Zonen, 1920-1930

Laboratory Medicine

1920-1930

Zernike galvanometer, used for measurement of muscle heat production, associated with A.V. Hill, by Kipp and Zonen, 1920-1930

General Post Office Differential Line Detector

Telecommunications

1910-1920

General Post Office differential line detector, made by the Automatic Telephone Manufacturing Co. Ltd, c. 1910. Model number: RH461. In wood case with glass fronted dial. Used to detect the presence of a current of electricity and to measure its strength.

Adjustable aperture on brass stand, accessory for galvanometer

Optics

1850-1924

Adjustable aperture on brass stand, used as accessory for galvanometer, made by Julius Sax, London, made 1850-1924 (Wellcome No. B1085)

Standard galvanometer by Robert W. Paul

Farnborough

Standard galvanometer by Robt.W. Paul

Moving-coil galvanometer

Electricity and Magnetism

1906

Moving-coil galvanometer, serial no.3828, by The Cambridge Scientific Instrument Co. Ltd., Cambridge, England, suspension-type, pointer-indicating instrument, for use with platinum, platinum-Rhodium thermocouple, scaled 0-1600 degree centigrade and 0-22 millivolts

Moving coil portable galvanometer

Electricity and Magnetism

1890-1891

Moving coil portable galvanometer by Weston Electrical Instrument Co. No.282

Johnson and Philips thermogalvanometer

Electricity Supply

1906

Johnson and Philips thermogalvanometer made in 1906

A galvanometer

Textile Industry

1950-1969

A galvanometer, manufactured by W.G. Pye & Co. Ltd..

Galvanometer, by W.G. Pye and Co. Ltd.

Telecommunications

Galvanometer, by W.G. Pye and Co. Ltd., Cambridge, England

Galvanometer, used by Harold Thompson

Experimental Chemistry

1934-1941

Paschen-type galvanometer for measuring electromagnetic radiation, part of an infrared spectrometer, by Cambridge Instrument Company Limited, prepared by Harold Thompson, Oxford, Oxfordshire, England, 1934-1941

Moving-coil galvanometer

Electricity and Magnetism

Moving-coil galvanometer, made by Sullivan, with moving-coil removable, and spare moving coil unit

Ayrton and Mather galvanometer with three interchangeable suspension units

Electricity and Magnetism

1920

Ayrton and Mather galvanometer with three interchangeable suspension units, by Baird & Tatlock

Tinsley spot galvanometer

Experimental Chemistry

c.1961

Tinsley spot galvanometer, light source and stand (for scale,missing) used in the estimation of molecular weights of organic compounds by Fisons Pest Control in 1962, made by H. Tinsley and Co, London

Obach's tangent galvanometer

Electricity and Magnetism

1889

Obach's tangent galvanometer

Circular moving coil galvanometer

Electricity and Magnetism

Circular moving coil galvanometer in wooden box. Also has wooden four legs. Manufactured by Cambridge Instr. Co.

Galvanometer Telegraph

Telecommunications

1859

W. H. Preece galvanometer telegraph, 1859.

Everett Edgcumbe galvanometer

Electricity and Magnetism

1945

moving coil galvanometer in wooden case. manufactured by Everett Edgcumbe, 1945

Galvanometer movement for Kingston light projector

Cinematography

Galvanometer movement for Kingston light projector. Mirror galvanometer movement for 1.2cm mirror on armature, tilted by attraction to electromagnet. Clamping screw. In 10.2cm diameter circular casing.

Siemens galvanometer

Electricity and Magnetism

1880

galvanometer. In wooden box with leather carying handle, and contains batteries.

Moving coil galvanometer

Electricity and Magnetism

1937

Moving coil galvanometer Manufactured by Everett, Edgcumbe and Company Limited

Marconi Wireless Telegraph Company galvanometer

Radio Communication

1920s

Galvanometer Charge/Discharge (coil missing), Type no. 189