Accession No

3337

Brief Description

suspended coil, reflecting AC galvanometer, Sumpner electrodynamometer type, by Robert W. Paul, English, dec. 1915

Origin

England; London

Maker

Paul, Robert W.

Class

electrical

Earliest Date

1915

Latest Date

1915

Inscription Date

Material

plastic (ebonite); metal (brass, copper, magnet, aluminium); glass (mirror)

Dimensions

height 240mm; base diameter 190mm

Special Collection

Provenance

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

Inscription

on top of case: “No. 15 / SUMPNER’S PATENT / ELECTRO-DYNAMOMETER / ROBT. W. PAUL, / LONDON, N.”

Description Notes

Circular ebonite base; three levelling feet; circular bubble level; seven brass terminals (for three fixed and one moving coil) ; cylindrical, brass removable case with circular glazed window showing circular suspended mirror; glass support for stationary electro magnet and vertical suspension tube; copper coil on aluminium frame suspended in two air gaps formed by the core of the electromagnet.

References

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