Accession No

4318

Brief Description

moving coil, pointer galvanometer, 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; glass; plastic (ebonite); ceramic

Dimensions

breadth 195mm; depth 205mm; height 133mm

Special Collection

Cambridge Instrument Company Collection

Provenance

Donated by the Cambridge Instrument Company.

Inscription

‘KILOCALORIES PER SQ. FT. PER HOUR
FOR USE WITH BOLOMETER
INST. No. C228539
CAMBRIDGE INSTRUMENT CO., LTD., LONDON AND CAMBRIDGE.’ (on dial)

Description Notes

In black metal case with carrying handle; three non-adjustable feet; glazed window in top showing pointer, white dial, and mirror; four ebonite covered terminals, for connection to a battery, and to the Callendar-Bone-Yates Bolometer; scale, 0 to 30 divisions; eight internal resistance coils wound on ceramic bobbins; five-position rotary switch connects different resistors into bridge circuit, providing different ranges and allowing calibration; zero adjustment screw.

Condition: good; complete.

References

Events