Accession No

4256

Brief Description

Plug and decade rotary switch Wheatstone Bridge, by Cambridge Instrument Company Ltd., English, 1957

Origin

England; London

Maker

Cambridge Instrument Company Ltd.

Class

electrical

Earliest Date

1957

Latest Date

1957

Inscription Date

Material

wood; plastic (ebonite); metal (brass, aluminium)

Dimensions

length 512mm; breadth 334mm; height 155mm

Special Collection

Cambridge Instrument Company Collection

Provenance

Donated by the Cambridge Instrument Company.

Inscription

“CAMBRIDGE INSTURMENT CO. LTD., ENGLAND (with logo) / No. L-348619” (on top);
“PHYSICS” (on aluminuim plate on wooden box, added)

Description Notes

Plug and decade rotary switch Wheatstone Bridge; made by Cambridge Instrument Company, c.1957.
Rectangular box with ebonite top (sealed); four plated brass and four ebonite covered terminals; two ebonite tapping keys; eight pairs of plug receptors, flush with surface, for the four pairs of proportional coils (10, 100, 1 000, and 10 000 ohms); three brass and ebonite plugs; six eleven-position rotary switches for series coils (0 to 1, 10, 100, 1 000, 10 000, and 100 000 ohms);

Condition: good; incomplete (five plugs missing)

References

Events