Accession No

4362

Brief Description

strip-recording galvanometer or thread recorder, single channel, two colours, by Cambridge and Paul Instrument Company Ltd., English, 1923

Origin

Cambridge; England

Maker

Cambridge and Paul Instrument Company Ltd.

Class

electrical

Earliest Date

1923

Latest Date

1923

Inscription Date

Material

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

Dimensions

width 350mm; height 382mm; depth 292mm

Special Collection

Cambridge Instrument Company Collection

Provenance

Donated by the Cambridge Instrument Company.

Inscription

‘THE
Cambridge and Paul
Instrument Co. Ltd.
London & Cambridge.
C31496’ (ivorine plate on front door; same inscription on front of frame)

Description Notes

Rectangular wooden box with hinged (hinges broken) locking glazed door and glazed window in top. 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 once every 24 hours. Linear scale above pointer marked ‘% CO2’, divided 20 - 0, numbered by 5, graduated to 1. Four terminals on base of frame.

Condition good (hinges broken on door; threads broken); complete

References

Events