Accession No

2435

Brief Description

photo-electric cell, by Cambridge Instrument Company Ltd., English, 1926

Origin

England; Cambridge

Maker

Cambridge Instrument Company Ltd.

Class

electrical

Earliest Date

1926

Latest Date

1926

Inscription Date

Material

wood; metal (brass, tin, silver, copper, white metal); glass; plastic (ivorine, one other)

Dimensions

height 159mm; breadth 90mm; depth 100mm

Special Collection

Provenance

Transferred from Department of Physical Chemistry, University of Cambridge, Cambridge, England, 3/8/1978.

Inscription

‘Cambridge
Instrument Co. Ltd.
London & Cambridge.
C 85967’ (ivorine plaque on side of box)
‘“Synchro”
SHUTTER
MADE BY
H.B.M. CO. LTD. LONDON’ (shutter)

Description Notes

Wooden box with brass hook fasteners and hinges; also three brass terminals at one end. Lid of box carries metal shutter with scale for setting aperture for f11, f16, f22 or f32 and release lever; also dial to regulate shutter speed. Inside box is a glass vacuum tube with central spherical reservoir, mostly silvered. Ring-shaped anode. Wires from anode and cathode run to terminals at end of box.

Condition good; complete.

References

Events