Accession No

2075

Brief Description

vacuum tube, 1875–1925

Origin

Maker

Class

physics

Earliest Date

1875

Latest Date

1925

Inscription Date

Material

glass; metal (white metal, brass, copper); inorganic (charcoal); cloth (cotton wool)

Dimensions

height 610mm; breadth 250mm; depth 65mm

Special Collection

Cavendish collection

Provenance

Transferred from Cavendish Laboratory, University of Cambridge, 1974.

Inscription

Description Notes

Experimental/demonstration vacuum tube with enlared cylindrical chamber. Side arm evacuation tube leads to two stopcocks and tube containing carbon chip vacuum regulator. Short white metal anode. Long tube opposite with cathode which consists of two copper wires ending in strip of foil (incandescent?). Brass cap on anode to improve electrical connection.

Condition fair; complete.

References

Events