electromagnetic generator
Date1920-1950
Inventory Number0147
ClassificationElectromagnetic Generator
Subject
Maker
Spindler & Hoyer
1898 - 1996
User
Department of Physics, Harvard University
founded 1884
Cultural Region
Place of Origin
Dimensions15.2 × 40.2 × 13.8 cm (6 × 15 13/16 × 5 7/16 in.)
Material
Bibliography
DescriptionThe rotating rectangular piece of iron between the pole of the horse-shoe permanent magnet changes the magnetic flux in the stationary coil. The coil itself consists of five turns permanently mounted in the field of the permanent magnet. The wheel turning the iron piece has a handle so it can be rotated by hand. The wheel though is grooved, to act as a pulley, so it can also be mechanically turned by a motor. The whole instrument is mounted on a rectangular wooden base.
Signedon instrument: SPINDLER & HOYER / GÖTTINGEN
FunctionThis device was used to generate AC current by a fluctuating magnetic field.
ProvenanceFrom the Department of Physics, Harvard University.
French
Date: 1840-1870
Accessories: key; cover with heavy coils for sparks
Object number: DW0080
Charles Chardin
Date: 1870-1900
Accessories: key; mahogany case
Object number: DW0829