GB1008182A - Improvements relating to x-ray tubes - Google Patents

Improvements relating to x-ray tubes

Info

Publication number
GB1008182A
GB1008182A GB39250/62A GB3925062A GB1008182A GB 1008182 A GB1008182 A GB 1008182A GB 39250/62 A GB39250/62 A GB 39250/62A GB 3925062 A GB3925062 A GB 3925062A GB 1008182 A GB1008182 A GB 1008182A
Authority
GB
United Kingdom
Prior art keywords
filament
tube
emission
held
assembly
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
GB39250/62A
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.)
Field Emission Corp
Original Assignee
Field Emission Corp
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 Field Emission Corp filed Critical Field Emission Corp
Publication of GB1008182A publication Critical patent/GB1008182A/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
    • H01J35/04—Electrodes ; Mutual position thereof; Constructional adaptations therefor
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J35/00—X-ray tubes
    • H01J35/22—X-ray tubes specially designed for passing a very high current for a very short time, e.g. for flash operation

Landscapes

  • X-Ray Techniques (AREA)

Abstract

1,008,182. X-ray tubes. FIELD EMISSION CORPORATION. Oct. 17, 1962 [Dec. 19, 1961], No. 39250/62. Heading H1D. An X-ray tube has an elongated conical anode 30 supported in a plurality of radially arranged parallel filament wires 48 providing both field and thermal emission held by supports 34, 36, surrounded by a shield and focusing element 50 held at filament or negative potential. The assembly may be contained in an extension of the cap outside the main body of the tube (Fig. 5, not shown). The filament may be alternatively formed by a cylindrical cage fed axially or radially (Figs. 8 and 10, not shown). A shielded getter element 54, 56 is connected between a connector pin 58 and one of the filament heads. The filament pins 42 are arranged to be raised to a temperature below emission temperature by conduction from the filament and through surface resistivity so that they are self-cleaning. The assembly may be also mounted in an L-section tube with the filament heads brought out at right angles to the anode axis. A shielded getter 54, 56 is provided.
GB39250/62A 1961-12-19 1962-10-17 Improvements relating to x-ray tubes Expired GB1008182A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US160534A US3283203A (en) 1961-12-19 1961-12-19 X-ray tube temperature enhanced field emission cathode

Publications (1)

Publication Number Publication Date
GB1008182A true GB1008182A (en) 1965-10-27

Family

ID=22577284

Family Applications (1)

Application Number Title Priority Date Filing Date
GB39250/62A Expired GB1008182A (en) 1961-12-19 1962-10-17 Improvements relating to x-ray tubes

Country Status (4)

Country Link
US (1) US3283203A (en)
DE (2) DE1963866U (en)
GB (1) GB1008182A (en)
NL (1) NL284298A (en)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3660712A (en) * 1970-12-09 1972-05-02 Atomic Energy Commission Electrode structure for controlling electron flow with high transmission efficiency
US3731095A (en) * 1971-04-01 1973-05-01 Hitachi Ltd Electron gun device of field emission type
US5442677A (en) * 1993-10-26 1995-08-15 Golden; John Cold-cathode x-ray emitter and tube therefor
US6064718A (en) * 1998-09-29 2000-05-16 The United States Of America As Represented By The Secretary Of The Navy Field emission tube for a mobile X-ray unit

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2130020A (en) * 1934-03-13 1938-09-13 Harry B Mceuen Cathode filament control for x-ray tubes
DE662408C (en) * 1934-04-14 1938-07-12 Ernst Pohl X-ray tubes, especially for fluoroscopy and imaging, with a conical anode surrounded by the cathode
NL40068C (en) * 1934-04-14
AT173771B (en) * 1951-08-22 1953-01-26 Rudolf Dr Thaller X-ray flash tube
US2886725A (en) * 1955-07-22 1959-05-12 Machlett Lab Inc X-ray tubes
US2973449A (en) * 1957-10-23 1961-02-28 Philips Corp Electric discharge tube

Also Published As

Publication number Publication date
NL284298A (en)
DE1228724B (en) 1966-11-17
US3283203A (en) 1966-11-01
DE1963866U (en) 1967-07-13

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