GB560155A - Improvements relating to getters for electron discharge tubes - Google Patents
Improvements relating to getters for electron discharge tubesInfo
- Publication number
- GB560155A GB560155A GB11688/42A GB1168842A GB560155A GB 560155 A GB560155 A GB 560155A GB 11688/42 A GB11688/42 A GB 11688/42A GB 1168842 A GB1168842 A GB 1168842A GB 560155 A GB560155 A GB 560155A
- Authority
- GB
- United Kingdom
- Prior art keywords
- foil
- discharge
- tube
- bombardment
- getters
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J7/00—Details not provided for in the preceding groups and common to two or more basic types of discharge tubes or lamps
- H01J7/14—Means for obtaining or maintaining the desired pressure within the vessel
- H01J7/18—Means for absorbing or adsorbing gas, e.g. by gettering
- H01J7/186—Getter supports
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J35/00—X-ray tubes
- H01J35/02—Details
- H01J35/20—Selection of substances for gas fillings; Means for obtaining or maintaining the desired pressure within the tube, e.g. by gettering
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J37/00—Discharge tubes with provision for introducing objects or material to be exposed to the discharge, e.g. for the purpose of examination or processing thereof
- H01J37/02—Details
- H01J37/18—Vacuum locks ; Means for obtaining or maintaining the desired pressure within the vessel
Landscapes
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Vessels, Lead-In Wires, Accessory Apparatuses For Cathode-Ray Tubes (AREA)
Abstract
560,155. Discharge apparatus. MULLARD RADIO VALVE CO., Ltd., and STEPHEN, R. A. Aug. 19, 1942, No. 11688. [Class 39 (i)] One or more foils of zirconium tantalum, titanium, or other material which operates as a getter when heated, are arranged in.the discharge path between the cathode and anode of an electron discharge tube, the discharge passing through an aperture in each foil which is thereby heated. Preferably the aperture is formed by cathode bombardment of a continuous foil mounted in the path of the discharge during manufacture of the tube, the foil first being degassed by heating by bombardment during pumping and then perforated by increasing the bombardment to evaporate that portion of the foil in the direct line of the discharge. The foil getters may be utilized in conjunction with alkaline earth or other getters which require to be kept remote from the discharge space. Fig. 1 shows an X-ray tube 1 having a foil 9 disposed between the cathode 2 and anode 3, the foil being held between apertured spiders 7, 8 mounted in a hood 5 for the anode. The foil may be prefabricated with a central aperture, or the latter may be formed by bombardment in the tube. In a modified construction the central portion 11, Fig. 3, of the tube envelope is of metal and carries an internal ring 15 to which the foil is clamped.
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB11688/42A GB560155A (en) | 1942-08-19 | 1942-08-19 | Improvements relating to getters for electron discharge tubes |
US504315A US2341483A (en) | 1942-08-19 | 1943-09-29 | Getter for electron discharge tubes |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB11688/42A GB560155A (en) | 1942-08-19 | 1942-08-19 | Improvements relating to getters for electron discharge tubes |
Publications (1)
Publication Number | Publication Date |
---|---|
GB560155A true GB560155A (en) | 1944-03-22 |
Family
ID=9990861
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB11688/42A Expired GB560155A (en) | 1942-08-19 | 1942-08-19 | Improvements relating to getters for electron discharge tubes |
Country Status (2)
Country | Link |
---|---|
US (1) | US2341483A (en) |
GB (1) | GB560155A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20130048882A1 (en) * | 2011-08-23 | 2013-02-28 | Canon Kabushiki Kaisha | Charged particle beam forming aperture and charged particle beam exposure apparatus |
Families Citing this family (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
BE448042A (en) * | 1941-11-20 | |||
US2449786A (en) * | 1943-03-05 | 1948-09-21 | Westinghouse Electric Corp | Getter |
US2688709A (en) * | 1949-11-12 | 1954-09-07 | Westinghouse Electric Corp | X-ray anode and method of making same by electric welding |
GB701050A (en) * | 1950-03-22 | 1953-12-16 | Werner Ehrenberg | Improvements in or relating to x-ray tubes |
US2683223A (en) * | 1952-07-24 | 1954-07-06 | Licentia Gmbh | X-ray tube |
US3566173A (en) * | 1968-09-03 | 1971-02-23 | Picker Corp | X-ray tube electrode mounting |
US3718970A (en) * | 1968-11-13 | 1973-03-06 | Vibrionics Res Co | Electromechanical transducer process |
US4947415A (en) * | 1986-05-09 | 1990-08-07 | Board Of Regents, The University Of Texas System | Flash x-ray apparatus |
US5044004A (en) * | 1986-05-09 | 1991-08-27 | Board Of Regents, The University Of Texas System | Flash X-ray apparatus |
US5838761A (en) * | 1996-05-06 | 1998-11-17 | Siemens Aktiengesellschaft | X-ray tube with getter |
US10453644B2 (en) * | 2015-11-25 | 2019-10-22 | Carestream Health, Inc. | Field-emission X-ray source |
-
1942
- 1942-08-19 GB GB11688/42A patent/GB560155A/en not_active Expired
-
1943
- 1943-09-29 US US504315A patent/US2341483A/en not_active Expired - Lifetime
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20130048882A1 (en) * | 2011-08-23 | 2013-02-28 | Canon Kabushiki Kaisha | Charged particle beam forming aperture and charged particle beam exposure apparatus |
Also Published As
Publication number | Publication date |
---|---|
US2341483A (en) | 1944-02-08 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
GB560155A (en) | Improvements relating to getters for electron discharge tubes | |
GB1190470A (en) | A Rotating-Anode X-Ray Tube. | |
US2665391A (en) | X-ray tube having a mica window | |
GB556046A (en) | Improvements relating to electron guns such as are used in cathode ray tubes | |
US2988657A (en) | Ion pump | |
GB627063A (en) | Improvements in or relating to cathode-ray tubes | |
GB1399260A (en) | Magnetrons | |
US2217448A (en) | Cathode | |
GB478024A (en) | Improvements in or relating to thermionic cathodes for high pressure metal vapour discharge devices | |
GB1105726A (en) | Ionisation vacuum pump | |
US2188288A (en) | Arrangement for generating tilting oscillations | |
GB951465A (en) | Sputter-ion vacuum pump apparatus | |
US2399752A (en) | External anode | |
US2437365A (en) | Annular electronic tube | |
US2225047A (en) | Screen grid tube | |
US2134577A (en) | Electrode system | |
US2939985A (en) | Low-pressure mercury vapour discharge tube | |
GB1049125A (en) | Ion pump | |
GB830319A (en) | Improvements in or relating to velocity-modulated tubes | |
GB582489A (en) | Improvements relating to magnetron electric discharge devices | |
GB661750A (en) | Improvements relating to thermionic valves | |
GB1082447A (en) | Electron-optical image converter | |
GB1245387A (en) | Improvements in or relating to image-converter electron tubes | |
GB835418A (en) | Improvements in electronic discharge tubes | |
GB506794A (en) | Improvements in or relating to electrode constructions for electron discharge tubes |