Accession No

2068

Brief Description

X-ray focus tube, by Cox, English, 1/4 20th Century

Origin

England; London

Maker

Cox

Class

physics

Earliest Date

1900

Latest Date

1925

Inscription Date

Material

glass; metal (at least two white metals, copper); rubber; paper

Dimensions

length 400mm; breadth 140mm; depth 220mm

Special Collection

Cavendish collection

Provenance

Transferred from Cavendish Laboratory, University of Cambridge, 1974.

Inscription

‘COX’S RECORD TUBE
No 5
MANUFACTURERS OF
X RAY APPARATUS,
9, 10 & 11 Cursitor St.
Chancery Lane.’ (paper label on cathode tube)

Description Notes

Glass tube with central spherical chamber, tinged purple from gas. White metal rod anode, ending in white metal disc, in arm. Opposing long tube with side arm containing white metal cathode ending in concave disc. Side arm with connection for the target, which consists of a white metal disc. White metal caps on electrodes to aid electrical connection; metal wire (broken) connects anode and target. Further side arm for evacuation tube.

Condition poor (considerable corrosion to caps, very dirty); complete.

References

Events