GB235141A - Improvements in or relating to electric discharge tubes - Google Patents
Improvements in or relating to electric discharge tubesInfo
- Publication number
- GB235141A GB235141A GB6916/25A GB691625A GB235141A GB 235141 A GB235141 A GB 235141A GB 6916/25 A GB6916/25 A GB 6916/25A GB 691625 A GB691625 A GB 691625A GB 235141 A GB235141 A GB 235141A
- Authority
- GB
- United Kingdom
- Prior art keywords
- cathode
- tubes
- metal
- sealed
- shield
- 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
- H01J5/00—Details relating to vessels or to leading-in conductors common to two or more basic types of discharge tubes or lamps
- H01J5/02—Vessels; Containers; Shields associated therewith; Vacuum locks
- H01J5/06—Vessels or containers specially adapted for operation at high tension, e.g. by improved potential distribution over surface of vessel
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J35/00—X-ray tubes
- H01J35/02—Details
- H01J35/16—Vessels; Containers; Shields associated therewith
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J2235/00—X-ray tubes
- H01J2235/16—Vessels
- H01J2235/165—Shielding arrangements
- H01J2235/168—Shielding arrangements against charged particles
Landscapes
- X-Ray Techniques (AREA)
Abstract
235,141. Naamlooze Vennootschap Philips' Gloeilampenfabrieken. June 4,1924, [Convention date]. R÷ntgen-ray tubes; vacuum tubes. - Parts between which there is a very high potential difference are connected to each other by a wall consisting of insulating sections alternating with one or more conducting sections. The potential difference may be equally divided between the insulating sections. In an X-ray tube for, say, 200,000 volts or more, the container may consist of glass tubes 1, 7 sealed to an intermediate chrome-iron cylinder 6 and carrying re-entrant tubes 2, 8 sealed respectively to the water-cooled anti-cathode 3 and to a metal shield 10 surrounding a filament cathode 11. These electrodes are situated within the metal portion 6 of the container. The anti-cathode 3 is of chrome-iron, with an inlaid tungsten plate 4. It is surrounded by a metal bell 18 to protect the joints of the envelope. An aperture 17 in the shield 10 allows passage of electrons and of the X-rays, which pass out through a window 9 closing the interior of the re-entrant tube 8. Connections 12 to the filament pass through silica beads in the metal shield 10 and are sealed through the glass tube 7. A separate leading-in wire 16 allows of impressing on the shield 10 a potential equal to the average cathode potential, or slightly lower than that of any part of the cathode. The metallic part 6 of the container is connected to earth and to the mid-point of the secondary of a transformer 23 supplying the electrodes. Variable resistances 21, 26 are provided in the primary circuits of the supply transformers. In modifications, a dome-shaped window for X-rays is sealed to an aperture in the side of the metal section of the envelope. The active surface of the anti-cathode, and the axis of the metal shield, may then be at right-angles to the positions shown, or the anticathode may have a bevelled end, the cathode being provided with a Coolidge focusing-ring. X-ray tubes of the kind described may be very highly exhausted, or may contain hydrogen or helium at a pressure such that harmful positive ionization does not occur. Such pressure may be about 0.0006 mm. of mercury, and in the case of helium may be 0.01 mm. Specifications 207,262, 208,108, and 209,833 are referred to.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
NL25627T | 1924-06-04 | ||
NL18585T | 1924-06-04 |
Publications (1)
Publication Number | Publication Date |
---|---|
GB235141A true GB235141A (en) | 1925-12-24 |
Family
ID=31949625
Family Applications (2)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB6916/25A Expired GB235141A (en) | 1924-06-04 | 1925-03-13 | Improvements in or relating to electric discharge tubes |
GB16777/25A Expired GB242946A (en) | 1924-06-04 | 1925-06-30 | Improvements in or relating to electric discharge tubes |
Family Applications After (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB16777/25A Expired GB242946A (en) | 1924-06-04 | 1925-06-30 | Improvements in or relating to electric discharge tubes |
Country Status (5)
Country | Link |
---|---|
US (2) | US1949347A (en) |
DE (2) | DE614655C (en) |
FR (2) | FR593087A (en) |
GB (2) | GB235141A (en) |
NL (3) | NL27284B (en) |
Families Citing this family (16)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
BE448042A (en) * | 1941-11-20 | |||
US2479201A (en) * | 1944-01-31 | 1949-08-16 | Philips Lab Inc | Geiger-muller counter |
NL77655C (en) * | 1945-11-26 | |||
US2535708A (en) * | 1948-04-10 | 1950-12-26 | Gen Electric X Ray Corp | X-ray generator |
US2620453A (en) * | 1948-05-07 | 1952-12-02 | Westinghouse Electric Corp | Protective device |
GB701050A (en) * | 1950-03-22 | 1953-12-16 | Werner Ehrenberg | Improvements in or relating to x-ray tubes |
US2686884A (en) * | 1950-05-01 | 1954-08-17 | Dunlec Corp | Space charge controlled X-ray tube |
GB731929A (en) * | 1951-02-03 | 1955-06-15 | Licentia Gmbh | Improvements in x-ray tubes |
US2877372A (en) * | 1954-06-22 | 1959-03-10 | Machlett Lab Inc | Gas-filled thyratron |
US3124710A (en) * | 1960-03-17 | 1964-03-10 | X-ray tubes | |
FR2687842B1 (en) * | 1992-02-26 | 1994-04-08 | General Electric Cgr | IMPROVEMENTS ON X-RAY SOURCES. |
US6570962B1 (en) * | 2002-01-30 | 2003-05-27 | Koninklijke Philips Electronics N.V. | X-ray tube envelope with integral corona shield |
GB2517671A (en) | 2013-03-15 | 2015-03-04 | Nikon Metrology Nv | X-ray source, high-voltage generator, electron beam gun, rotary target assembly, rotary target and rotary vacuum seal |
US10398011B2 (en) | 2015-11-12 | 2019-08-27 | Kimtron, Inc. | Method and apparatus for active filament management |
US10342107B2 (en) | 2015-11-12 | 2019-07-02 | Kimtron, Inc. | Cascaded filament transformer within a resistive shroud |
WO2017109981A1 (en) * | 2015-12-25 | 2017-06-29 | 株式会社ニコン | Charged particle device, structure manufacturing method, and structure manufacturing system |
-
0
- NL NL18585D patent/NL18585C/xx active
- NL NL25627D patent/NL25627C/xx active
- NL NL27284D patent/NL27284B/xx unknown
-
1925
- 1925-01-14 DE DEN24025D patent/DE614655C/en not_active Expired
- 1925-01-27 US US5108A patent/US1949347A/en not_active Expired - Lifetime
- 1925-02-07 FR FR593087D patent/FR593087A/en not_active Expired
- 1925-03-13 GB GB6916/25A patent/GB235141A/en not_active Expired
- 1925-06-06 DE DEN24654D patent/DE641080C/en not_active Expired
- 1925-06-30 GB GB16777/25A patent/GB242946A/en not_active Expired
- 1925-08-25 US US52398A patent/US1607952A/en not_active Expired - Lifetime
- 1925-08-29 FR FR30909D patent/FR30909E/en not_active Expired
Also Published As
Publication number | Publication date |
---|---|
US1949347A (en) | 1934-02-27 |
NL27284B (en) | |
NL25627C (en) | |
US1607952A (en) | 1926-11-23 |
DE614655C (en) | 1935-06-18 |
FR593087A (en) | 1925-08-17 |
DE641080C (en) | 1937-01-21 |
FR30909E (en) | 1926-10-05 |
GB242946A (en) | 1926-01-21 |
NL18585C (en) |
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