US1955665A - Discharge vessel having alpha discharge space which is limited by alpha metal wall - Google Patents
Discharge vessel having alpha discharge space which is limited by alpha metal wall Download PDFInfo
- Publication number
- US1955665A US1955665A US548179A US54817931A US1955665A US 1955665 A US1955665 A US 1955665A US 548179 A US548179 A US 548179A US 54817931 A US54817931 A US 54817931A US 1955665 A US1955665 A US 1955665A
- Authority
- US
- United States
- Prior art keywords
- alpha
- discharge
- limited
- metal wall
- discharge vessel
- 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 - Lifetime
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Classifications
-
- 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
- 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
Definitions
- the present invention has for its purpose to improve the construction above referred to.
- the inner metal cylinder according to the invention is placed in such a manner, that it extends at least on one side beyond the edge of the outer metal cylinder.
- the density of the electric lines of force going from the electrodes to the edges of the outer cylinder is materially reduced, so that the glass wall is no longer exposed to dangerous electric stresses.
- the accompanying drawing shows by way of example an X-ray tube having a cylindrical glass wall 1.
- a metal cylinder 4 surrounds the cathode 2 and the anode 3 on the outer side of the glass wall 1.
- a metal cylinder 5 which is provided on the inner side of the glass wall.
- the metal cylinder 5 extends on both sides beyond the outer metal cylinder 4 and is electrically connected to the latter by means of a wire 6 sealed through the glass wall 1.
- Both metal cylinders are provided with a window '7 through which the rays may emerge from the X-ray tube.
- a discharge tube of the character described comprising a cylindrical glass envelope of substantially uniform diameter from end to end, a cathode and an anode arranged in spaced relation in said envelope, a cylindrical conducting sleeve member on the outside surface of said envelope midway between the ends thereof and surrounding the operative parts of said cathode and anode, a second conducting sleeve member on the inside of said envelope surrounding the operative parts of saidcathode and anode and extending on at least one side beyond the firstmentioned sleeve member and a conductive connection between said sleeve members.
- An X-ray tube comprising a substantially cylindrical glass envelope, a cathode and an anode in said envelope, a metallic sleeve on the outside of said envelope surrounding said cathode and anode, a second metallic sleeve on the inside of said envelope surrounding said cathode and anode and extending axially of the tube beyond the ends of the first-mentioned sleeve and a conductive connection between said sleeves.
Description
April 17, 1934. J. ALF-[ER 1,955,665
DISCHARGE VESSEL HAVING A DISCHARGE SPACE WHICH IS LIMITED BY A METAL WALL Filed July 1, 1931 Patented Apr. 17, 1934 UNITED STATES PATENT OFFICE DISCHARGE VESSEL HAVING A DISCHARGE SPACE WHICH IS LIMITED BY A METAL WALL burg, Germany Application July 1, 1931, Serial No. 548,179 In Germany July 3, 1930 2 Claims.
In discharge tubes, in particular in those of the type operating with a pure electron discharge, often undesired stresses of the glass wall occur in the proximity of the electrodes. These loads exert on the one hand an unfavourable influence on the discharge and on the other they are likely to cause puncturing of the glass wall especially when the outer side of this wall contacts with bodies having earth potential. It has already been proposed to prevent such stresses by providing screens within the tube or by providing a metal cylinder within the tube which cylinder is arranged concentrically with respect to the glass wall and which is connected to an analogous metallic cylinder provided on the outer wall of the discharge vessel, said connection being established by hermetically sealing a metal wire through the glass wall.
The present invention has for its purpose to improve the construction above referred to. At the edges of these metal cylinders which are opposite each other relatively high intensities of field occur, by which the puncturing of the glass wall is furthered at these points. In order to avoid these high intensities of field, the inner metal cylinder according to the invention is placed in such a manner, that it extends at least on one side beyond the edge of the outer metal cylinder.
By so forming the metal cylinder so as to protect the glass wall, the density of the electric lines of force going from the electrodes to the edges of the outer cylinder, is materially reduced, so that the glass wall is no longer exposed to dangerous electric stresses.
The accompanying drawing shows by way of example an X-ray tube having a cylindrical glass wall 1. A metal cylinder 4 surrounds the cathode 2 and the anode 3 on the outer side of the glass wall 1. Opposite this cylinder is placed a metal cylinder 5 which is provided on the inner side of the glass wall. The metal cylinder 5 extends on both sides beyond the outer metal cylinder 4 and is electrically connected to the latter by means of a wire 6 sealed through the glass wall 1. Both metal cylinders are provided with a window '7 through which the rays may emerge from the X-ray tube.
What I claim is:
1. A discharge tube of the character described comprising a cylindrical glass envelope of substantially uniform diameter from end to end, a cathode and an anode arranged in spaced relation in said envelope, a cylindrical conducting sleeve member on the outside surface of said envelope midway between the ends thereof and surrounding the operative parts of said cathode and anode, a second conducting sleeve member on the inside of said envelope surrounding the operative parts of saidcathode and anode and extending on at least one side beyond the firstmentioned sleeve member and a conductive connection between said sleeve members.
2. An X-ray tube comprising a substantially cylindrical glass envelope, a cathode and an anode in said envelope, a metallic sleeve on the outside of said envelope surrounding said cathode and anode, a second metallic sleeve on the inside of said envelope surrounding said cathode and anode and extending axially of the tube beyond the ends of the first-mentioned sleeve and a conductive connection between said sleeves.
J OSEF ALFTER.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE390127X | 1930-07-03 |
Publications (1)
Publication Number | Publication Date |
---|---|
US1955665A true US1955665A (en) | 1934-04-17 |
Family
ID=6372266
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US548179A Expired - Lifetime US1955665A (en) | 1930-07-03 | 1931-07-01 | Discharge vessel having alpha discharge space which is limited by alpha metal wall |
Country Status (3)
Country | Link |
---|---|
US (1) | US1955665A (en) |
FR (1) | FR718983A (en) |
GB (1) | GB390127A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE970545C (en) * | 1939-11-04 | 1958-10-02 | Standard Elek K Lorenz Ag | Method for installing the electrode system attached to the tube foot of an electron tube |
US2952790A (en) * | 1957-07-15 | 1960-09-13 | Raytheon Co | X-ray tubes |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2179488B (en) * | 1985-08-22 | 1989-08-23 | English Electric Valve Co Ltd | Laser apparatus |
-
1931
- 1931-06-22 FR FR718983D patent/FR718983A/en not_active Expired
- 1931-06-23 GB GB18157/31A patent/GB390127A/en not_active Expired
- 1931-07-01 US US548179A patent/US1955665A/en not_active Expired - Lifetime
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE970545C (en) * | 1939-11-04 | 1958-10-02 | Standard Elek K Lorenz Ag | Method for installing the electrode system attached to the tube foot of an electron tube |
US2952790A (en) * | 1957-07-15 | 1960-09-13 | Raytheon Co | X-ray tubes |
Also Published As
Publication number | Publication date |
---|---|
GB390127A (en) | 1933-03-30 |
FR718983A (en) | 1932-01-30 |
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