Accession No

4257

Brief Description

Plug type decade Wheatstone Bridge, by Cambridge Scientific Instrument Company Ltd., English, c.1902

Origin

England; Cambridge

Maker

Cambridge Scientific Instrument Company Ltd.

Class

electrical

Earliest Date

1902

Latest Date

1902

Inscription Date

Material

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

Dimensions

length 708mm; breadth 253mm; height 200mm

Special Collection

Cambridge Instrument Company Collection

Provenance

Donated by the Cambridge Instrument Company.

Inscription

“CAMBRIDGE SCIENTIFIC INSTRUMENT CO. LTD. / MANGANIN / No. 1525” (on top)

Description Notes

Plug type decade Wheatstone Bridge; made by the Cambridge Scientific Instrument Co., c.1902;
Rectangular wooden box with ebonite top; eight brass terminals; brass block with plug receptors: four decades for series coils (0 to 0.9, 9, 90, and 900 ohms) and five pairs of proportional coils (1, 10, 100, 1 000, and 10 000 ohms); brass and ebonite plugs; all coils are manganin wire wound on brass tubes fastened to underside of top plate;

Condition: fair; incomplete (several plugs missing);

References

Events