High-Tension Vacuum Tester
1950-1979
High-Tension Tester model T2, with HT Unit type 1 (an autotransformer) permanently connected in the supply lead, made by Edwards High Vacuum Ltd, Crawley, Sussex (for vacuum testing)
Four glass plates bearing infra-red reflection films
1919-1958
Four glass plates (each 3 1/2 inches square) bearing infra-red reflection films
Complete educational high vacuum pumping equipment
1955-1968
Complete educational high vacuum pumping equipment, model 2SC20A, Serial No. 11579, two stagerotary pump fitted with Solenoid Air Admittance valve, by Edwards High Vacuum Ltd, Manor Royal, Crawley, Sussex, England, 1955-1968.
4 MeV electron linear accelerator built by D.W. Fry et al
1947
4 MeV electron linear accelerator built by D.W. Fry et al, c. 1948. Ancillary - equipment: IONISATION GAUGE CONTROL UNIT model 3. Made in England by Edwards High Vacuum Ltd., Crawley, Sussex.
Stack of nine glass plates (each 3 1/4 inches square) coated with magnesium fluoride
1958
Stack of nine glass plates (each 3 1/4 inches square) coated with magnesium fluoride for demonstrating anti-reflection films, by Edwards High Vacuum Ltd., Crawley, Sussex, 1958.
Edwards Freeze Drying Unit model 10P made by Edwards High Vacuum Ltd.
circa 1950
Edwards Freeze Drying Unit model 10P made by Edwards High Vacuum Ltd., c. 1950.
Four vacuum pumps
1981-1991
Four vacuum pumps, sectioned for display:- (1) Rotary vacuum pump, (2) Turbo molecular vacuum pump, (3) Oil diffusion vacuum pump, (4) Sputter Ion Pump, made by Edward High Vacuum International, Crawley, West Sussex, England, 1981-1991.