| 摘要 |
495,440. R÷ntgen-ray tubes. BRITISH THOMSON-HOUSTON CO., Ltd. May 11, 1937, No. 13388. Convention date, May 11, 1936. [Class 39 (i)] [Also in Group XX] The apparatus comprises a metal casing enclosing an evacuated envelope containing a cathode, an anode and a rotor for rotating the anode, terminal connections associated with the envelope for impressing a high potential difference on the anode and cathode, an electromagnetic stator within the casing and encircling the envelope, and an oil filling in the casing surrounding the envelope and insulatingly separating the terminal connections and stator. In the form shown the envelope 10 contains a rotating anode as described in Specification 495,435 and a dual filament cathode assembly as described in Specification 495,441. The anode bearings are carried on a shaft 45 which projects through the end of the envelope 10, and carries a connection 49 engaged by a projecting stud 31 connected to the high tension cable 27 introduced through bushings 29, 30 attached to the cap portion 90 of the outer casing. This permits easy removal of the cap 90. For this purpose also the current supply for the stator is connected to terminals attached to the cap and engaged by spring contact members on the stator. The cathode connections are introduced through bushings 24, 26. The member 49 is carried on an insulator 50 attached to a semi-cylindrical shell 51, bolted to the stator 39 attached to the main casing 1. A sheath 70 of phenolic resin surrounds the envelope 10 and projects into the space between it and the stator. Lead shields 75, 78 are provided. The cone 20 is also lined with lead. A siphon bellows device 67 takes up expansion of the oil filling of the casing. In a modification the casing contains both tube and exciting transformers. Specification 14892/13, [Class 39 (i)], also is referred to.
|
