Accession No

2405

Brief Description

moving coil, reflecting galvanometer, by Leeds and Northrup Company, U.S.A., 2nd quarter of the 20th Century

Origin

U.S.A.; Pennsylvania; Philadelphia

Maker

Leeds and Northrup Company

Class

electrical

Earliest Date

1925

Latest Date

1950

Inscription Date

Material

ebonite; metal (brass; iron) glass

Dimensions

height 222mm; base diameter 126mm

Special Collection

Provenance

Transferred from Department of Physical Chemistry, University of Cambridge, Cambridge, England, 1978.

Inscription

‘MADE IN U.S.A.’ (top of case)
‘LEEDS & NORTHRUP CO.
PHILADELPHIA PA.’ (base)
‘3’ (added on case)

Description Notes

Suspended coil, reflecting Galvanometer, D’Arsonval type.
Circular ebonite base; three ebonite levelling feet; two ebonite-covered terminals; removable brass, black-painted cylindrical case with vertical rectangular glazed window in front; vertical horseshoe magnet; coil suspended, around fixed iron core, within cylindrical gap of magnet; circular mirror above coil; zero adjustment knobs at side and top; coil clamping control at top.
condition good (suspension intact); complete.

References

Events