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Electromagnet used by James Jo

F-Quadrapole electromagnet from the storage ring of the Synchrotron Radiation Laboratory

Small superconducting electromagnet

1965

Replica of James Joule's Electromagnet

Electromagnet Core

1855-1865

Part of Electromagnet

1855

Part of Electromagnet

1855

Part of Electromagnet

1855

Large electromagnet with one armature and two pole pieces

1850

Electromagnet and rotating copper disc

Horseshoe electromagnet, probably home-made

1900-1980

Superconducting Electromagnet, 1990

1985-1995

Cased electromagnet

Horseshoe-shaped electromagnet used by James Joule

Ferranti electromagnet

Ferranti electromagnet

Electromagnet Type E

1960-1979

Electromagnet Core

1835-1845

Electromagnet for a crane, by Witton Kramer

Electromagnet Core

1839

Electromagnet Core

1855-1865

Electromagnet made by James Joule for experiments on lifting power

1840

Part of Electromagnet

1860

Ophthalmic electromagnet, United Kingdom, c. 1940

1935-1945
Ferranti,electromagnet

Ferranti,electromagnet

Large electromagnet by Ducretet, formerly the property of Spottiswoode

Large electromagnet by Ducretet

1879-1883
Electromagnet used by James Joule, c.1840.

Electromagnet used by James Joule

Electromagnet used by James Joule in about 1839 for experiments on the attracting power of magnets. Iron bar is wound with '88 yards of covered copper wire 1/16" diameter.' One of a pair of magnets used to test the law that 'the attractive force of two electromagnets is directly proportional to the square of the electric force to which the iron is exposed', i.e. M (attraction) = E squared (electric current) x W squared (length of wire). Results showed that as the length of the bar is increased, so the power of attraction increases.

Electromagnet used by James Joule in about 1839 for experiments on the attracting power of magnets

Electromagnet originally used for magnetising compass needles

Electromagnet originally used for magnetising compass needles

"Nivoc" electromagnet by W. and J. George and Becker Ltd., Birmingham and London

"Nivoc" electromagnet by W. and J. George and Becker Ltd.

1950-1954
Quarter scale model of Mullard large adjustable 'Ticonal' permanent magnet assembly, type 1148/1, on felt covered wooden base with perspex cover, unsigned, British, 1950-1954

Model of Mullard 'Ticonal' permanent magnet assembly

1950-1954
Large superconducting electromagnet, made at the Central Electricity Research Laboratories, between 1963-1969

Large superconducting electromagnet

1963-1969
Large electromagnet by Nalder Bros. and Co., no.4947, fitted with bracket for suspending crystals when measuring diamagnetic susceptibilities

Large electromagnet by Nalder Bros. and Co

1881-1910
Electromagnet and keeper

Electromagnet and keeper

Newport type N38 electromagnet

Newport type N38 electromagnet, with power supply and power lead

1981
Electro-magnet horseshoe form

Electro-magnet horseshoe form

Large electromagnet (1850)

Large electromagnet

1850
Electromagnet used by James Joule, c.1840.

Electromagnet used by James Joule

Superconducting electromagnet, prototype of the magnet used in medical magnetic resonance imaging machines, made by Oxford Magnet Technology Limited, Wharf Road, Eynsham, Witney, Oxon, OX18 1BP, England, 1989-1990.

Superconducting electromagnet

1989-1990