Accession No

4359

Brief Description

recorder galvanometer (Callendar), by Cambridge Instrument Company Ltd., English, 1931

Origin

England; Cambridge

Maker

Cambridge Instrument Company Ltd.

Class

electrical

Earliest Date

1931

Latest Date

1931

Inscription Date

Material

wood; glass; metal (brass)

Dimensions

breadth 405mm; height 384mm; depth 190mm

Special Collection

Cambridge Instrument Company Collection

Provenance

Donated by the Cambridge Instrument Company.

Inscription

‘CAMBRIDGE
INSTRUMENT CO. LTD.
LONDON & CAMBRIDGE
C 164446’ (on brass plate on frame door)

Description Notes

Rectangular wooden case with hinged, locking, glazed door; two pairs of terminals on top, labelled ‘M’ and ‘G’ respectively, fifth terminal labelled ‘CC’; suspended coil D’Arsonval galvanometer with pointer connected to wheel of contact clock.

Condition: fine (galvanometer suspension intact, clockwork operational); complete.

References

Events

Description
This galvanometer is similar to the upper part of the Wheatstone bridge Callendar recorder, and was used with the combined potentiometer and Wheatstone Bridge type of recorder (see Camb. Sc. Inst. Co. (1906) p. 14). The Ledger Book refers to ‘1 Callendar Recorder’, indicating that the two pieces of complete instrument were given the same serial number.

(This information was moved from the Provenance field into this entry during the database normalisation project in 2017-2018.)
01/02/2018
Created by: Dannielle Cagliuso on 01/02/2018

FM:41254