Accession No

2979

Brief Description

gas X-ray rectifier, by Cuthbert Andrews, English, c. 1950

Origin

England

Maker

Cuthbert Andrews

Class

physics

Earliest Date

1950

Latest Date

1950

Inscription Date

Material

glass; metal (at least 3 white metals, copper, one other); graphite; stone (mica)

Dimensions

first length 560mm; breadth 260mm; depth 160mm second length 550mm; breadth 240mm; depth 155mm

Special Collection

Provenance

Donated by Department of Physics, Guy’s Hospital Medical School, University of London, London, England, 1983.

Inscription

‘Andrews Rapid X Ray Tube
NO. 100814
Made in England.
BY
CUTHBERT ANDREWS’ (etched into glass of main chamber of first)
‘X RAYS LIMITED’ (remains of paper label on one arm of first)
‘Andrews Rapid X Ray Tube
NO. 112374
Made in England.
BY
CUTHBERT ANDREWS’ (etched into glass of main chamber of second)

Description Notes

Each tube consists of spherical glass chamber with opposing side arms for the two electrodes. One electrode consists of white metal rod ending in concave disc; the other consists of white metal cylinder, flaring at the open end and carrying a central copper rod. Small side arm evacuation tube off main chamber; also a side arm for the carbon-mica regulator tube, which is connected to the electrodes by wires (broken off at non-regulator end on one; wires completely missing from the other).

No. 100814 = 2979.1
No. 112374 = 2979.1

Incomplete (connecting wires missing from one).

References

Events