Accession No

3349

Brief Description

electrostatic voltmeter, White.James, 1893 (c)

Origin

Glasgow; Scotland

Maker

White. James

Class

electrical

Earliest Date

1893

Latest Date

1893

Inscription Date

Material

plastic (ivorine); metal (brass, silver, aluminium); wood; paper; glass

Dimensions

height 327mm; breadth 203mm; depth 205mm

Special Collection

Provenance

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

Inscription

‘Sir William Thomson’s
PATENT
No. 103
J. WHITE GLASGOW’ (on plate on case)
‘ENGINEERING LABORATORIES
CAMB. UNIV.’ (on ivorine plate on base (added))

Description Notes

In brass cylindrical case, mounted on wooden base with three levelling screws; circular glazed window at top showing silvered dial and levelling bubble (dry); paper scale marked non-linearly from 0 to 240 divisions, extending over arc of about 70 degrees; aluminium pointer; central brass suspension post extending vertically through glass, with zero adjustment on top; brass terminal on side of case, insulated from case, with two-position rotary switch; glass cup for damping oil at bottom of brass case (dry).

Condition: good (suspension intact); complete.

References

Events