induction coil
Datecirca 1925
Inventory Number1997-1-0139
ClassificationInduction Coil
Subject
User
Department of Physics, Harvard University
founded 1884
Cultural Region
Dimensions29 x 13 x 13 cm (11 7/16 x 5 1/8 x 5 1/8 in.)
Material
DescriptionTwo coils, wound in parallel, each with 193.5 turns and six layers. Red insulated copper wire, oak end squares, and black brass.
Grey painted triangle on side. Most likely blue once, indicating this instrument was used in the Physics 3 course at Harvard University in the late 1920s.
Grey painted triangle on side. Most likely blue once, indicating this instrument was used in the Physics 3 course at Harvard University in the late 1920s.
Signedunsigned
Inscribedengraved on bottom: 2 COILS / WOUND PARALLEL / CENTER H.R. TUBE / 2 IN. DIAM / 6 LAYERS / EACH / 193 A2 TURNS COIL
FunctionFor experimentation and demonstration of the high voltages induced in a secondary winding when the current in the primary windings is abruptly disrupted.
ProvenanceFrom the Department of Physics, Cruft Laboratory, Harvard University.
Department of Physics, Harvard University
Date: 1890-1930
Accessories: extra set of coils without multi-tap windings (0156d, e); extra magnet; square wooden case
Object number: 0156b
Thomas Burton Kinraide
Date: circa 1900
Accessories: condensers (VT4811b)
Object number: VT4811a
