Accession No

3313

Brief Description

inductor, Campbell's adjustable mutual inductance, by Robert W. Paul, English,1929 (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)

Dimensions

length 362mm; breadth 249mm; height 205mm

Special Collection

Provenance

Transferred from Department of Engineering, University of Cambridge, Cambridge, England, 1986.

Inscription

‘CAMPBELL ADJUSTABLE MUTUAL INDUCTANCE
No. 30
Robt. W. Paul, London, N.’ (on dial)

Description Notes

In wooden box, with two part top; ebonite part having mount on it nine brass and ebonite terminals and one ebonite rotary switch; three additional ebonite controls and pointers, with ivorine dials; wooden part of top with rectangular ivorine plate on which is marked a semi-circular scale; rotating ebonite pointer; inside the box are two fixed primary coils, and two fixed and one moving secondary coils.
Similar to Wh: 2597.

References

Events