Accession No

1307

Brief Description

Campbell capacitance bridge, attributed to Cambridge Instrument Company, English, 1928 (c)

Origin

Maker

Cambridge Instrument Company [attributed]

Class

electrical

Earliest Date

1928

Latest Date

1928

Inscription Date

Material

wood; paper; metal (aluminium)

Dimensions

length 350mm; breadth 280mm; height 206mm

Special Collection

Provenance

Donated(?) from Mr. J.L. Thompson in 1972.

Inscription

‘Patent No. 252 990
Campbell Capacitance Bridge
C 298’ ( on large paper dial)
‘C298
Capacitance Bridge’ (on end of box)

Description Notes

Wooden top loosely set in a rough, wooden box; two rotary switches with pointers and paper dials; scales hand lettered in ink; box has strips of aluminium foil glued to its inside.

Condition: fair; complete.

References

Events