permeability ring
Date: circa 1900
Inventory Number: 0460
Classification: Induction Coil
Subject:
Maker: Broadway Iron Foundry (founded 1864)
User: Lawrence Scientific School (1847 - 1906)
User: Department of Physics, Harvard University (founded 1884)
Cultural Region:
Place of Origin:
City of Use:
Dimensions:
3.5 × 21.5 × 21.5 cm (1 3/8 × 8 7/16 × 8 7/16 in.)
Material:
Description:
A cast iron ring. It has ridges along it in the same direction as the circle flows.
Signedunsigned
Inscribedpaper label: Cast iron. / from Broadway Iron Foundry / 1900 / From HARVARD UNIVERSITY, / LAWRENCE SCIENTIFIC SCHOOL, / ELECTRICAL ENGINEERING LABORATORY, / CAMBRIDGE, MASS.
FunctionUsed for winding inductance coils.
Curatorial Remarks"In a collection of handwritten class room notes, "Laboratory Notes of Physics 4, Harvard University 1898" the ring is shown in diagram on page 12, and referred to as a "permeability ring."
ProvenanceFrom the Lawrence Scientific School, Harvard University; From the Department of Physics, Jefferson Laboratory, Harvard University.