Accession No

1438

Brief Description

moving coil, reflecting galvanometer, by J. Pitkin, English, last quarter of 19th Century

Origin

England; London

Maker

Pitkin, J.

Class

electrical

Earliest Date

1875

Latest Date

1900

Inscription Date

Material

plastic (ebonite); metal (brass, iron); glass; cord; cloth

Dimensions

height 190mm; diameter 150mm

Special Collection

Provenance

Donated by the Royal Institution, London, England.

Inscription

‘HOLDEN D’ARSONVAL
GALVANOMETER
J. PITKIN MAKER LONDON
NO. 273’ (top of case and inside door of box)
‘550’ (iron core)

Description Notes

Suspended coil, reflecting Galvanometer, Holden-D’Arsonval type.
Circular ebonite base; three adjustable brass feet; two brass terminals on base; cylindrical multi-layer magnet; central support post; suspended coil, without former, surrounds fixed iron core; mirror above coil; brass adjusting screw at lower end of suspension; cylindrical brass case with circular glazed window.

Wooden box.

Complete

Suspension broken

References

Events