Accession No

4284

Brief Description

electrodynamic multi-range pointer wattmeter, by Cambridge Instrument Company Ltd., English, 1935

Origin

England; London

Maker

Cambridge Instrument Company Ltd.

Class

electrical

Earliest Date

1935

Latest Date

1935

Inscription Date

Material

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

Dimensions

length 323mm; breadth 265mm; height 122mm

Special Collection

Cambridge Instrument Company Collection

Provenance

Donated by the Cambridge Instrument Company.

Inscription

‘WATTS
CAMBRIDGE MULTI RANGE WATTMETER
No. L 69313
ELECTRODYNAMIC’ (on dial)
‘CAMBRIDGE SCIENTIFIC
INSTRUMENTS LTD.
EQUIPT. No. 40-0451’ (on paper label on top (added))

Description Notes

Ebonite top; two pairs of brass and ebonite terminals, for fixed and moving coils; three position reversing switch for moving coil; zero adjustment screw; glazed window showing pointer, white dial and mirror; scale with left zero, and 150 divisions; third terminal o left side; added ‘AMP RANGE’ two-position rotary switch; in wooden box with hinged lid and leather carrying strap.
Similar to Wh: 4285 but double range.

Condition: fair; incomplete (lid, leather strap missing).

References

Events