GB316579A - Improvements relating to electron discharge devices - Google Patents

Improvements relating to electron discharge devices

Info

Publication number
GB316579A
GB316579A GB22306/29A GB2230629A GB316579A GB 316579 A GB316579 A GB 316579A GB 22306/29 A GB22306/29 A GB 22306/29A GB 2230629 A GB2230629 A GB 2230629A GB 316579 A GB316579 A GB 316579A
Authority
GB
United Kingdom
Prior art keywords
cathode
rays
electrons
target
impinge
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
Application number
GB22306/29A
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Westinghouse Lamp Co
Original Assignee
Westinghouse Lamp Co
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Westinghouse Lamp Co filed Critical Westinghouse Lamp Co
Publication of GB316579A publication Critical patent/GB316579A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J35/00—X-ray tubes
    • H01J35/02—Details
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J33/00—Discharge tubes with provision for emergence of electrons or ions from the vessel; Lenard tubes
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J35/00—X-ray tubes
    • 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
    • H01J5/18—Windows permeable to X-rays, gamma-rays, or particles

Landscapes

  • X-Ray Techniques (AREA)

Abstract

316,579. Westinghouse Lamp Co., (Assignees of Slack, C. M.). July 31, 1928, [Convention date]. R÷ntgen-ray tubes; vacuum tubes.-In order to produce X-rays of high frequency or highvelocity cathode rays, X-rays are caused to impinge on a cathode liberating secondary electrons, the velocity of which is increased by the difference of potential between this cathode and a secondary target on which they impinge. Fig. 1 shows the invention applied to an X-ray tube. From the cathode 2, consisting of a coil of tungsten or tantalum mounted in a focussing cup 8 and electro-static shield 9, electrons are emitted to strike a disc of tungsten &c. mounted in a copper block 10, which also forms the anode, and inclined to direct the X-rays generated against a second cathode 16 connected to the cathode 2 and shaped to focus the electrons emitted on to a secondary target 18 mounted in the block 10. In a modification the secondary cathode is considerably larger than the primary cathode and surrounds it, only one target being employed. Fig. 3 shows an arrangement for generating high-velocity cathode rays. In addition to primary and secondary cathodes 23 and 24 arranged as shown in Fig. 1 a tertiary cathode 25 is provided which directs the liberated electrons through a tubular anode 27 to a thin glass window 30 in the tube.
GB22306/29A 1928-07-31 1929-07-19 Improvements relating to electron discharge devices Expired GB316579A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US296489A US1920601A (en) 1928-07-31 1928-07-31 Electron discharge device

Publications (1)

Publication Number Publication Date
GB316579A true GB316579A (en) 1930-02-13

Family

ID=23142210

Family Applications (1)

Application Number Title Priority Date Filing Date
GB22306/29A Expired GB316579A (en) 1928-07-31 1929-07-19 Improvements relating to electron discharge devices

Country Status (5)

Country Link
US (1) US1920601A (en)
DE (1) DE581356C (en)
FR (1) FR679583A (en)
GB (1) GB316579A (en)
NL (1) NL28272C (en)

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2767341A (en) * 1952-08-12 1956-10-16 Dunlee Corp Anode structure for double filament x-ray tube
US2764706A (en) * 1952-12-26 1956-09-25 Dunlee Corp Hooded anode x-ray tube with tilted target
DE1002896B (en) * 1954-03-10 1957-02-21 Dr Bernhard Hess Photoelectric X-ray tube
DE1053681B (en) * 1954-10-19 1959-03-26 Dr Bernhard Hess Device for generating charge carriers with a multiplication of the charge carriers generated by a primary radiation
US2853618A (en) * 1954-10-27 1958-09-23 Marco John J De Method and apparatus for the use of fluorescent x-rays in powder diffraction
DE1131332B (en) * 1955-03-11 1962-06-14 Dr Bernhard Hess X-ray tube
US3033984A (en) * 1959-02-17 1962-05-08 United States Steel Corp Apparatus for increasing the energy of x-rays
US4359660A (en) * 1980-12-15 1982-11-16 Physics International Company Series diode X-ray source

Also Published As

Publication number Publication date
US1920601A (en) 1933-08-01
DE581356C (en) 1933-07-26
NL28272C (en)
FR679583A (en) 1930-04-15

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