Accession No

4363

Brief Description

Strip-recording galvanometer or thread recorder, also known as a drum recorder, single channel, two colours, 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

wood; metal (brass, cast iron, white metal); glass; plastic (ivorine)

Dimensions

width 345mm; height 381mm; depth 286mm

Special Collection

Cambridge Instrument Company Collection

Provenance

Donated by the Cambridge Instrument Company.

Inscription

‘Cambridge
Instrument Co. Ltd.
London & Cambridge
C46883’ (on ivorine plaque on door and on front of instrument)

Description Notes

Rectangular wooden box with hinged locking glazed door and glazed window in top (glass missing from door and window). On fixed foot and two levelling feet. Cast iron instrument frame removable from box; suspended coil D’Arsoval galvanometer at rear with long pointer extending to drum recorder at front; clamp and zero adjustments at top; upper of two clockworks depresses pointer on inked threads at regular intervals; the continuous inked threads are also moved along a system of pulleys periodically; lower clockwork rotates chart drum. Four terminals on base of frame.

Condition poor (no glass, thread off pulleys); complete.

References

Events