Accession No

4325

Brief Description

resistor, Duddell-Mather patent anti-capacity gauze resistance, by Cambridge Instrument Company Ltd., English, 1937

Origin

England; London

Maker

Cambridge Instrument Company Ltd.

Class

electrical

Earliest Date

1937

Latest Date

1937

Inscription Date

Material

wood; metal (brass, other, wire); plastic (ebonite); cloth (silk); thread (silk)

Dimensions

length 330mm; breadth 283mm; height 350mm

Special Collection

Cambridge Instrument Company Collection

Provenance

Donated by the Cambridge Instrument Company.

Inscription

‘DUDDEL-MATHER PATENT
ANTI-CAPACITY GAUZE RESISTANCE
CAMBRIDGE INSTRUMENT CO. LTD., ENGLAND. (with logo)
No. L-79403
FOR USE WITH INSTRUMENT No. L-14717’ (on top)

Description Notes

Rectangular wooden box with brass carrying handles; ebonite and metal-grid top; metal grids cover ventilation holes on two sides and bottom; two rows of five ebonite rods fastened to underside of top plates support a seven-inch wide ribbon of constanton wire, silk-covered and woven with silk thread; terminals connect to ends and intermediate point of resistive ribbon, providing two resistances.

Condition: good; complete.

References

Events