Historical information

This X-ray tube was designed to provide electrostatic protection for the filament (cathode) so as to permit long life to be achieved at operating voltages in the range 100-300kV. It is not certain whether the tube was in use within the School by Professor Laby’s X-ray group or whether it was presented to the School by a medical user. It would be somewhat surprising if it fitted into this School of Physics Research Program at a date as late as 1933 when tubes with demountable anodes were in use.

Physical description

Glass bulbous X-ray tube attached at either end to metal electrodes. Mounted for demonstration on a wooden base. Dated1937

Inscriptions & markings

On glass bulb: “Machlett Patent 1954016”