Accession No

4299

Brief Description

resistance box, voltage ratio box, by Cambridge Instrument Company Ltd., English, 1958

Origin

England; London

Maker

Cambridge Instrument Company Ltd.

Class

electrical

Earliest Date

1958

Latest Date

1958

Inscription Date

Material

wood; plastic (ebonite, other); stone (mica); metal (aluminium, other, wire)

Dimensions

length 393mm; breadth 286mm; height 145mm

Special Collection

Cambridge Instrument Company Collection

Provenance

Donated by the Cambridge Instrument Company.

Inscription

‘CAMBRIDGE VOLTAGE RATIO BOX
CAMBRIDGE
INSTRUMENT CO. LTD.
ENGLAND.
No. L-354498’ (on top)
‘PHYSICS’ (on aluminium plate on top, added)

Description Notes

Rectangular wooden box; black plastic top; ventilation holes in all sides of box; two ebonite covered output terminals (1,5 volts); eight input terminals (earth, plus seven voltages from 1.5 to 1500 volts); resistors wire-wound on mica plates, fastened by ebonite frame to underside of top plate; metal grids over ventilation holes, connected to earth terminal.

Condition: good; complete.

References

Events