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Induction coil, four terminals

Induction coil, four terminals

Electrotherapeutic induction coil, in case, c.1900

Electrotherapeutic induction coil, in case, c.1900

1900

Induction coil with interrupter made by J. Newman

Induction coil with interrupter made by J. Newman

1840-1857

Sectioned induction coil

Sectioned induction coil

1874

Apps-Newton one inch induction coil by Newton & Co.

Apps-Newton one inch induction coil by Newton & Co.

1898

Miniature induction coil

Miniature induction coil

Large induction coil made by Alfred Apps

Large induction coil made by Alfred Apps

1876

Induction coil

Induction coil

1981

Induction coil with electrodes for electrotherapy, England, 1900-1910

Induction coil with electrodes for electrotherapy, England, 1900-1910

1900-1910

Induction coil stimulator

Induction coil stimulator

1968

Induction Coil

Induction Coil

1881

Du Bois-Reymond-type induction coil, London, England, 1920-1940

Du Bois-Reymond-type induction coil, London, England, 1920-1940

1920-1940

Sledge induction coil, Du Bois-Reymond type

Sledge induction coil, Du Bois-Reymond type

Medical induction coil

Medical induction coil

1925-1950

Medical induction coil

Medical induction coil

1910

Induction coil

Induction coil

Induction coil with integral spark-gap

Induction coil with integral spark-gap

1916

Alfred Apps, London, 10-inch induction coil

Alfred Apps, London, 10-inch induction coil

1890

Apps-Newton 10-inch induction coil, for X-ray work

Apps-Newton 10-inch induction coil, for X-ray work

1898

Miniature induction coil, circa 1950

Miniature induction coil, circa 1950

1950-1959

H.M.S Challenger Induction coil

H.M.S Challenger Induction coil

1870

Induction coil, mounted, with trembler

Induction coil, mounted, with trembler

Sledge type induction coil by C.F. Palmer Ltd.

Sledge type induction coil by C.F. Palmer Ltd.

Du Bois-Reymond style sledge induction coil with extendable track and magnetic interrupter

Du Bois-Reymond style sledge induction coil with extendable track and magnetic interrupter

1953

Large induction coil, by Ruhmkorff, of Paris icluding original base cabinet, battery, glass and brass posts, and flax/hemp cable.

Large Induction Coil, by Ruhmkorff, of Paris

1851-1877

Induction Coil System made by Alfred Apps, for Milliam Spottiswoode, F.R.S., consisting of: A large induction coil, a coil in a glass top cabinet, two black pillars, two glass cabinets and seven components

Components for Spottiswoode Induction Coil

1876

Metal coil for induction heating for black-body primary standard apparatus.

Induction Coil for Black-body Primary Standard Apparatus

10" induction coil

10" induction coil

Induction coil, mounted on wooden base, 18" x 11", 10" high, coil mounted horizontally on top with switch gear and interrupter gear at one end, elec. no. 808.

Induction coil

Induction coil with switch, simple hammer-break interrupter, discharging electrodes, and capacitor in base

Induction coil with switch

1900-1980

Large induction coil with accessories.

Large induction coil with accessories.

1902

Large induction coil by Alfred Apps, London, used by Sir William Crookes, with additional primary coil

Large induction coil by Alfred Apps

1879

Large induction coil

Large Induction Coil

1902

Induction coil described as an 'electric ozonizer' and possibly used for freshening the air in a large room. Not fitted with an interrupter. Part of the Riviere collection, but mistakenly lost its A-number when accessioned. This is similar but not identical to the large induction coil attached to the D'Arsonval Cage as depicted in photos in Riviere's scrapbook in the Wellcome Library.

Induction coil described as an 'electric ozonizer'

Induction coil by Griffin and Tatlock Ltd.

Induction coil by Griffin and Tatlock Ltd.

1926-1954

Portable induction coil enclosed in polished wooden case with carrying handles, by Harry W. Cox Ltd., 1A Rosebery Avenue, London, England, 1905-1908. With discharging points on screw-in pillars, hammer-break interrupter, Ruhmkorff commutator, fuse, moving iron ammeter no.31164 reading up to 11 amps, and localising slide for an x-ray tube stand.

Portable induction coil enclosed in polished wooden case with carrying handles

1905-1908

Induction coil, part of low voltage x-ray set by Frederick R. Butt and Co., London, England, 1918-1919.

Induction Coil

1918-1919

Horizontal induction coil with interruptor, reversing switch and 1 ebonite pillar with terminal on top (another missing), all on wooden plinth made by Harvey and Peak, Beak Street, London, English, 1890-1900

Horizontal Induction Coil

1890-1900

Induction coil used by L. A.Woodward, possibly in conjunction with a Raman Spectrograph

Induction coil used by L. A.Woodward

Box, mahogany, containing induction coil by Gaiffe of Paris, about 1905

Induction Coil

circa 1905

13inch spark induction coil, on wooden plinth, with 'on/off' switch. Dated April 1907. Manufactured by Harold Fowler, Flixton

13 inch spark induction coil

1907

Two induction coils for induction-type deep x-ray therapy installation, by A E Dean and Company Limited, London, England, 1923.

Induction coils for induction-type deep x-ray therapy installation

1923

Induction coil for x-ray use, by A E Dean and Company Limited, London, England, 1903-1929.

Induction coil for x-ray use

1903-1929

Induction coil by Newton & Co., 3 Fleet Street, London, no.1380, c.1910

Induction coil by Newton & Co.

1901-1920

Induction coil, part of x-ray installation, by Cox-Cavendish Electrical Co., London, England, 1920-1925.

Induction coil

1920-1925