Accession No

3447

Brief Description

thermal, pointer voltmeter, by Paterson and Cooper, English, 1885

Origin

England; London

Maker

Patterson and Cooper

Class

electrical

Earliest Date

1885

Latest Date

1885

Inscription Date

1885

Material

metal (brass, platinum-silver); wood; paper (card)

Dimensions

length 1056mm; breadth 153mm; depth 77mm box length 1097mm; breadth 189mm; height 111mm

Special Collection

Provenance

Purchased from Department of Physics, King’s College, London, England, 1986.

Inscription

‘CARDEW’S VOLTMETER, PATENE.
PATERSON & COOPER,
LONDON.’ (on dial)

Description Notes

Circular, brass-frame mounted on front of rectangular wooden box; glazed window showing silvered dial and black central pointer; non-linear scale, 0 to 150, extending over almost 360 degrees; brass terminal on each side of box, hinged door at back; long brass tube, with mounting bracket, extending from top of box; tube encloses four lengths (approx. 4m) platinum-silver wire. In rectangular black box with hinged lid and carrying handle; two spools for extra wire, fastened inside lid of box, marked ‘Instrument wire / .0025”’ and ‘Fuses wire / .0015”’. On hand-written card on inside of carrying box: ‘Cardew Voltr. No. 122. / R = 404.1 w at 19.9 Cent. / 14/7/85 / S.G.’

Condition: fine (movement intact); complete.

References

Events