Accession No

3332

Brief Description

resistance box, by Evershed and Vignoles Ltd., English, 1930

Origin

England; London

Maker

Evershed and Vignoles Ltd.

Class

electrical

Earliest Date

1930

Latest Date

1930

Inscription Date

1930

Material

wood; hide (leather); plastic (ebonite, other); metal (brass, other); ceramic; paper

Dimensions

length 395mm; breadth 154mm; height 155mm

Special Collection

Provenance

Transferred from Department of Engineering, University of Cambridge, Cambridge, England, 1986.

Inscription

‘STANDARD OHMS
EVERSHED’S PATENT
EVERSHED & VIGNOLES LTD. LONDON’ (on top)
‘EVERSHED’S PATENT (TRACTION TYPE) BRIDGE-MEGGER AND DIRECT READING 5-DIAL RESISTANCE BOX
INSTRUCTIONS FOR USE...’ (on label inside lid)
‘EVERSHED’S PATENT DIRECT READING RESISTANCE BOX
No. 55828
Maximum 9999.9 Ohms
EVERSHED & VIGNOLES LTD. LONDON’ (on metal plate on lid)

Description Notes

Rectangular wooden box with hinged lid and leather handle; ebonite and metal top; two anodized brass terminals; five ten-position switches, each with ebonite handles and circular plastic window showing digit on dial; coils wound on ceramic bobbins (except smallest values, which are without formers) arranged in semicircular pattern around each switch, fastened to underside of top plate. Paper label inside lid, giving resistance values for all settings, dated ‘17.3.30’.

Condition: fine; complete.

References

Events