Accession No

4294

Brief Description

suspended magnet, reflecting galvanometer, Paschen shielded type, by Cambridge Instrument Company Ltd., English, 1930

Origin

England; Cambridge

Maker

Cambridge Instrument Company Ltd.

Class

electrical

Earliest Date

1930

Latest Date

1930

Inscription Date

Material

metal (brass, other); plastic (ebonite); glass (mirror)

Dimensions

height 355mm; base diameter 235mm

Special Collection

Cambridge Instrument Company Collection

Provenance

Donated by the Cambridge Instrument Company.

Inscription

on top of case “...C 142400”

Description Notes

Circular brass base with three levelling feet and two brass terminals mounted on ebonite plate; cylindrical brass case with rectangular glazed window showing parts of coil boxes and suspended mirror; two knurled knobs on top of cover for controlling magnets inside; brass block on two ebonite pillars supports two pairs of ebonite coil boxes (removable) ; systems of five small, parallel horizontal magnets suspended within each pair of coils, with suspended mirror between; glass suspension tube extends vertically through center of case; knurled brass controls at top of tube; cylindrical and circular iron and multi-layer ‘mumetal’ shields surround mechanism, inside brass case.
Good condition; incomplete (suspended system, one case screw missing)

References

Events