Accession No

3317

Brief Description

inductance bridge, by H.W. Sullivan Ltd., English, 1946

Origin

England; London

Maker

H. W. Sullivan Ltd.

Class

electrical

Earliest Date

1946

Latest Date

1946

Inscription Date

1946

Material

wood; plastic (ebonite, ivorine)

Dimensions

length 655mm; breadth 635mm; height 250mm

Special Collection

Provenance

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

Inscription

‘SULLIVAN-GRIFFITHS
UNIVERSAL INDUCTANCE BRIDGE
RANGE 1 uH TO 100 H
SERIAL No. 337/1946
H.W. SULLIVAN LTD. LONDON.’ (on top)
‘292’ (on ivorine plate on top (added))

Description Notes

Rectangular wooden box with ebonite top; terminal pairs for AC and DC supply, detector, and unknown resistance or inductance; fourteen additional terminals; external socket with three relay contacts; six rotary decade switches for resistance (0.01 to 1 000 ohm), four for inductance (10 to 10 000 uH); additional rotary switches/controls for AC supply adjustment, multiplier, and zero balance; toggle switches for AC/DC and test function; pivoted coil, pointer, null galvanometer; tapping keys for battery and galvanometer. With 16-page instruction booklet, including circuit and external connection diagrams.

Condition: good (bracket for external socket broken); complete.

References

Events