Accession No

4262

Brief Description

electrodynamic, pointer ammeter, Irwin astatic type, by Robert W. Paul, English, 1922 (c)

Origin

England; London

Maker

Paul, Robert W.

Class

electrical

Earliest Date

1922

Latest Date

1922

Inscription Date

Material

plastic (ebonite); metal (brass); wood; hide (leather)

Dimensions

length 194mm; breadth 205mm; height 120mm

Special Collection

Cambridge Instrument Company Collection

Provenance

Donated by the Cambridge Instrument Company.

Inscription

‘No. L.6957
RES. 3.8 OHMS AT 20 C
ON X1. RANGE
X 10,000 LBS.FT.’ (on dial)
‘IRWIN ASTATIC
Robt. W. Paul, London, N.’ (on top)

Description Notes

Ebonite top; glazed window showing white dial and mirror; non-llinear scales, 0 to 10 and 0 to 0.5 (hand drawn); two brass terminals; brass plug receptors (for two scales) and two brass plugs; zero adjustment screw. In wooden box with lid and leather carrying strap.

Condition: good (leather carrying strap broken); complete.

References

Events