Accession No

3279

Brief Description

electrostatic voltmeter, Lord Kelvin's multicellular volt meter, by Kelvin, Bottomley and Baird Ltd., Scottish/English, 1915-1925 (c)

Origin

Scotland; Glasgow and England; London

Maker

Kelvin, Bottomley and Baird Ltd.

Class

electrical

Earliest Date

1915

Latest Date

1925

Inscription Date

Material

metal; glass; plastic (ebonite); wood; paper

Dimensions

box height 370mm; breadth 270mm; depth 300mm

Special Collection

Provenance

Donated, 1985.

Inscription

‘LORD KELVIN’S
MULTICELLULAR
VOLT METER No. 16383.
KELVIN BOTTOMLEY & BAIRD, LTD.
LATE
KELVIN & JAS. WHITE LTD.
GLASGOW & LONDON’ (on case)
‘KELVIN BOTTOMLEY & BAIRD LTD.
GLASGOW & LONDON.
MULTIPLIER No. 16164’ (on resistance box)

Description Notes

In metal case, all painted black; horizontal glazed window showing white dial with mirror; non-linear scale, 0 to 120 volts; two terminals, ‘O - ON’ switch, clamp screw, and bubble level on horzontal surface of case; cylindrical upper part of case houses suspension mechanism and includes zero adjustment screw; three feet, two adjustable; glass cup at bottom to contain oil for damping; with five-position resistance box, screwed to case underneath dial; in wooden carrying case with hinged lid; typed calibration paper pinned to inside of box door; bottle full of oil.
Similar to Wh: 3358.

Condition: good (suspension intact); complete.

References

Events