Villard Tube  (1898 - 1905)

 

         

               10”(25cms) long, 4”(10cms) bulb. Concave aluminum cathode. Platinum anti-cathode. Flat plate anode. Made by Emil Gundelach, bearing No. 2818.  Basically similar in design to the “Bulbar Focus Tube”, with the addition of a regeneration device using Paul Villard’s osmotic method.

 

               This regeneration device consists of a small capillary platinum (or palladium) tube, closed at the external end while the other end is sealed through the glass wall and communicates with the cavity of the x-ray tube. With use the gas pressure inside the tube drops down and the tube becomes “hard”. By heating the external part of the capillary in a flame, gas diffuses through the capillary into the tube and restores the correct pressure.

 

 

     

 

 

 

               This tube was donated to this collection by the late Rev. François Dupré Latour sj, ex-Dean and Professor of Physics at the School of Medicine of the St. Joseph University in Beirut. It had belonged to the late Rev. Maurice Collangettes sj, Professor of Physics during the first years of the 20th Century (see picture below), who had received, in 1900,  from France, his first x-ray outfit..

 

 

 

 

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