Electric lamp and discharge devices – Electrode and shield structures – With lead wire or connector
Patent
1980-03-31
1982-03-16
Smith, Ronald H.
Electric lamp and discharge devices
Electrode and shield structures
With lead wire or connector
313 55, 313 60, 427292, 427423, 427427, 427328, 156629, 156645, 134 41, 427123, H01J 3508, H01J 3510
Patent
active
043203230
ABSTRACT:
In an X-ray tube rotary anode having a supporting body (1) of molybdenum alloy, a target (2) of tungsten alloy, and a rough tungsten layer, applied by flame spraying to the whole surface of the anode except the focal path (4), for improving heat radiation, the rough tungsten layer does not adhere well to the tungsten alloy target, and particles of the rough tungsten layer may become detached in use, degrading the performance of the X-ray tube. To alleviate this problem, the whole surface of the anode, except the focal path (4), is blasted with steel grit, steel grit particles embedded in the anode are removed with acid, and the whole surface of the anode, except the target (2), is coated with a rough tungsten layer (3) by plasma spraying.
REFERENCES:
patent: 2376219 (1945-05-01), Winslow
patent: 3037142 (1962-05-01), Griffoul et al.
patent: 3400010 (1968-09-01), Keating
patent: 3731128 (1973-05-01), Haberrecker
patent: 3753021 (1973-08-01), Braun
patent: 4038786 (1977-08-01), Fong
Hayden, Ceramic Age, Jan. 1969, pp. 40-42.
Flame Spray Handbook, Metco Inc. vol. III, Plasma Flame Process, 1965, pp. 40 and 44-45.
Magendans Frederik
Te Raa Gerhardus A.
van Rheenen Bernhard J.
Briody Thomas A.
Bueker Richard
Kraus Robert J.
Smith Ronald H.
Treacy David R.
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