Accession No

4959

Brief Description

galvanometer, by Griffin and George Ltd., English, second half 20th Century

Origin

England

Maker

Griffin and George Ltd.

Class

electrical

Earliest Date

1950

Latest Date

1997

Inscription Date

Material

plastic (synthetic rubber, perspex, at least two others); metal (copper, brass white metal); paper (cardboard and at least one other)

Dimensions

diameter of dial 76mm; depth of galvanometer 100mm; length 125mm; breadth 100mm

Special Collection

Provenance

Donated on 30 July 1997.

Inscription

on the dial
‘GRIFFIN & GEORGE LTD.
GALVANOMETER’

Description Notes

Rubber base wedge shaped with non slip grip on to which is fixed the galvanometer in clear perspex. Inner workings of galvanometer visible including brass subsidiary coils and the plates of the electromagnet.
Paper dial plate held in place by two screws, with resistances marked for the different scales: ‘2-0-2m.A. 50~’ ‘2.A.=0.2~’ A.V.= 2000~’. Scale divided 2 - 0 - 2, numbered by 1, subdivided to 0.1 Black-painted metal pointer moves over scale.
Four terminals set above scale. Positive is red and marked with ‘+’; three negative terminals marked with the appropriate range: ‘2A’, ‘4V’, ‘2MA’.

Condition good; complete.

References

Events