EP 0349386 A1 19900103 - X-ray tube with a variable focal spot adjusting itself to the charge.
Title (en)
X-ray tube with a variable focal spot adjusting itself to the charge.
Title (de)
Röntgenröhre mit veränderlichem Brennfleck der sich von selbst an die Ladunganpasst.
Title (fr)
Tube à rayons X à foyer variable auto-adapté à la charge.
Publication
Application
Priority
FR 8808958 A 19880701
Abstract (en)
The problems are resolved of temperature holding in both the anode (2) and the cathode (1) by making a flat cathode (7) engraved in a device (8) for running focusing. It is shown that, depending on the shape of this device, the heat flow at the anode is constant whatever the charge of the tube. <IMAGE>
Abstract (fr)
On résouts les problèmes de tenue en température à la fois de l'anode (2) et de la cathode (1)en réalisant une cathode plane (7) inscrite dans un dispositif (8) de focalisation à marche. On montre que selon la forme de ce dispositif le débit thermique sur l'anode est constant quelle que soit la charge du tube.
IPC 1-7
IPC 8 full level
H01J 35/06 (2006.01); H01J 35/14 (2006.01)
CPC (source: EP US)
H01J 35/066 (2019.04 - EP US); H01J 35/147 (2019.04 - EP US)
Citation (search report)
- [A] US 1923876 A 19330822 - ARTHUR MUTSCHELLER
- [A] US 4344011 A 19820810 - HAYASHI TADASHI, et al
- [A] DE 416533 C 19250717 - SIEMENS AG
- [A] PATENT ABSTRACTS OF JAPAN, vol. 2, no. 64 (E-33)[2148], 17 mai 1978, page 2148 E 78; & JP-A-53 30 292 (TOKYO SHIBAURA DENKI K.K.) 22-03-1978
- [A] PATENT ABSTRACTS OF JAPAN, vol. 4, no. 157 (E-32)[639], 4 novembre 1980, page 131 E 32; & JP-A-55 108 158 (HITACHI SEISAKUSHO K.K.) 19-08-1980
Designated contracting state (EPC)
DE ES GB IT NL
DOCDB simple family (publication)
EP 0349386 A1 19900103; EP 0349386 B1 19920527; DE 68901636 D1 19920702; ES 2032128 T3 19930101; FR 2633774 A1 19900105; FR 2633774 B1 19910208; JP 2840614 B2 19981224; JP H0254847 A 19900223; US 5060254 A 19911022
DOCDB simple family (application)
EP 89401760 A 19890622; DE 68901636 T 19890622; ES 89401760 T 19890622; FR 8808958 A 19880701; JP 16969189 A 19890630; US 37388589 A 19890630