induction coils
Datecirca 1915
Inventory Number0476
ClassificationInductance Coil
Subject
User
Department of Physics, Harvard University
founded 1884
Maker
American
?
Cultural Region
Dimensions11.6 × 30.6 × 12.6 cm (4 9/16 × 12 1/16 × 4 15/16 in.)
Material
DescriptionA pair of induction coils mounted on a wooden base. The coils slide on a rail so that the distance between them can be altered.
From Instrument Card: "Variable Coupling Coils...A pair of single layer coils in dove-tail groove, mounted on a rectangular wood base. Two binding posts on the frame of each coil. Windings of LITZ wire many small strands, each with its insulator."
From Instrument Card: "Variable Coupling Coils...A pair of single layer coils in dove-tail groove, mounted on a rectangular wood base. Two binding posts on the frame of each coil. Windings of LITZ wire many small strands, each with its insulator."
Signedunsigned
FunctionProbably for demonstration of electromagnetic induction. One can vary the distance between the coils.
ProvenanceFrom the Harvard University Physics Department.
Historical AttributesUsed for demonstration in the Harvard Physics Department.
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: 0156a
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
Date: late 19th-early 20th Century
Object number: RS0168
Daniel Davis, Jr. & E. B. Horn
Date: circa 1850
Object number: 0106
Department of Physics, Harvard University
Date: mid 20th-late 20th Century
Accessories: variety of spare coils (in 2004-1-0408c); samples to be placed inside coil (2004-1-0410)
Object number: 2004-1-0408b
Date: 1890-1930
Object number: RS0528