Accession No

4270

Brief Description

Duddell thermal, reflecting galvanometer, by Cambridge Instrument Company Ltd., English, 1924

Origin

England; Cambridge

Maker

Cambridge Instrument Company Ltd.

Class

electrical

Earliest Date

1924

Latest Date

1924

Inscription Date

Material

metal (brass); glass

Dimensions

height 350mm; base diameter 230mm

Special Collection

Cambridge Instrument Company Collection

Provenance

Donated by the Cambridge Instrument Company.

Inscription

‘CAMBRIDGE
INSTRUMENT CO. LTD. ENGLAND
C46417’ (on frame of outer window)
‘C 46417 (with logo)’ (on metal block, below inner window)

Description Notes

Heavy circular brass base, with three levelling feet; two bubble levels; two brass terminals, one connected to the base; double-walled cylindrical cover, black painted, with front glazed window; removable brass lid; inner instrument has double circular glazed windows showing suspended mirror; heavy brass block below windows covers vertical loop suspended in gap of magnet, thermocouple, and heating element. With C.I.Co. repair label, dated 29-4-47.

Condition: good (suspension intact); complete.

References

Events