Accession No

3311

Brief Description

vibration galvanometer, by Cambridge Instrument Company Ltd., English, 1930

Origin

England; London

Maker

Cambridge Instrument Company Ltd.

Class

electrical

Earliest Date

1930

Latest Date

1930

Inscription Date

Material

stone (slate); metal (brass); wood (ebony); plastic (ebonite); glass

Dimensions

height 343mm; base diameter 204mm

Special Collection

Provenance

Transferred from Department of Engineering, University of Cambridge, Cambridge, England, 1986.

Inscription

‘CAMBRIDGE
INSTRUMENT CO. LTD.
ENGLAND (with logo)
CAMPBELL VIBRATION GALVANOMETER.
No. L-36240’ (on top of brass housing)

Description Notes

Black slate base; three levelling feet; two ebony and brass terminals mounted on ebonite plate; cylindrical black painted housing; circular brass framed window with lens showing suspended mirror on small coil between the magnet poles; knurled brass knob on top of housing adjusts tension; horizontal shaft with knurled handle controls length of vibrating section of suspension and hence coarse frequency tuning; removable brass cylindrical cover of upper mechanism.

Condition: good (suspension intact); complete.

References

Events