Accession No

2597

Brief Description

inductor, Campbell's adjustable mutual inductance, by Robert W. Paul, English, 1912 (c)

Origin

England; London

Maker

Paul, Robert W.

Class

electrical

Earliest Date

1912

Latest Date

1912

Inscription Date

Material

wood; plastic (ebonite, ivorine); metal (brass); paper

Dimensions

length 360mm; breadth 250mm; height 218mm

Special Collection

Provenance

Donated by Imperial College, London, England, 1980.

Inscription

‘CAMPBELL’S ADJUSTABLE MUTUAL INDUCTANCE
No. 24
Robt. W. Paul, London, N.’ (on ebonite top)
‘MM2’ (on front of box (added))

Description Notes

In wooden box, with 2-part top; ebonite part having mounted on it nine brass and ebonite terminals and two rotary switches; wooden part with rectangular ivorine plate on which is marked a semi-circular scale (-0.35 to 10.4 microhenries); rotating ebonite pointer; inside the box are two fixed primary coils, and two fixed and one moving secondary coils. Box has wooden cover, with two papers fastened to inside, one ‘26.1.32’, the other ‘10 May 1943’.

Condition: good; complete.

References

Events