Accession No

4326

Brief Description

bolometer, by Cambridge Instrument Company Ltd., English, 1937

Origin

England; Cambridge

Maker

Cambridge Instrument Company Ltd.

Class

electrical

Earliest Date

1937

Latest Date

1937

Inscription Date

Material

metal (platinum, other, brass, copper, mercury); plastic (ebonite); wood; glass

Dimensions

box length 221mm; breadth 126mm; height 171mm

Special Collection

Cambridge Instrument Company Collection

Provenance

Donated by the Cambridge Instrument Company.

Inscription

‘CAMBRIDGE INSTRUMENT CO. LTD.
ENGLAND
C 232732 (with logo)’ (on one cover plate)
‘EXPOSE THIS SIDE’ (on other cover plate)

Description Notes

Black metal cylinder; circular cavities on either side, with metal cover plates, to hold platinum-resistance coils; pipes for inflow and outflow of water, and for mercury-in-glass thermometer; two pairs of ebonite covered brass terminals; socket with brass screw for support stand. Five yards of twisted, four strand insulated leads, with copper lugs. In wooden box with hinged lid.

This Bolometer was used with the portable pivoted coil pointer Galvanometer, with internal Wheatstone bridge (Wh: 4318).

Incomplete (platinum resistors missing).

References

Events