induction coil
Datecirca 1915
Inventory Number0480
ClassificationInductance
Subject
Maker
Radiation Laboratory of the Massachusetts Institute of Technology
?
1940 - 1945
User
Department of Physics, Harvard University
founded 1884
Cultural Region
Place of Origin
Place of Use
Dimensions21.2 × 33 × 11.4 cm (8 3/8 × 13 × 4 1/2 in.)
Material
DescriptionFrom Instrument Card: "Inductance Standard...Glass tube 3 1/4" in diameter mounted in hard rubber frame (wood bottom) with connection trips. Coils are wrapped around the glass tube and attached to two binding posts on the inside top of the frame."
Signedengraved? STANDARD INDUCTANCE / CRUFT LABORATORY / TYPE G NO 3
Inscribedin pencil on frame: 303 TURNS / L = 2.041 mh
Curatorial RemarksMay have been made in the Cruft Laboratory, or just used there.
FunctionStandard of inductance. Used for teaching.
ProvenanceFrom the Physics Department, Harvard University. Was stored in the Cruft Laboratory attic.
Lincoln Laboratory, Massachusetts Institute of Technology
Date: circa 1955
Object number: 2014-1-0011
Massachusetts Charitable Mechanic Association
Date: dated 1869
Accessories: leather case lined with tan velvet
Object number: 1998-1-1359
Massachusetts Charitable Mechanic Association
Date: dated 1850
Accessories: brown leather case with tan velvet lining
Object number: 1998-1-1352
Massachusetts Charitable Mechanic Association
Date: dated 1856
Accessories: black leather case with maroon velvet lining
Object number: 1998-1-1356
Massachusetts Charitable Mechanic Association
Date: dated 1869
Accessories: black leather case with purple velvet lining
Object number: 1998-1-1355
Massachusetts Charitable Mechanic Association
Date: dated 1874
Accessories: in leather case with purple velvet lining
Object number: 1998-1-1358
Wireless Specialty Apparatus Company
Date: circa 1908
Accessories: copper-plated glass cylinders (0507b and 0507c)
Object number: 0507a