GB560155A - Improvements relating to getters for electron discharge tubes - Google Patents

Improvements relating to getters for electron discharge tubes

Info

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
Application number
GB11688/42A
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.)
Mullard Radio Valve Co Ltd
Original Assignee
Mullard Radio Valve Co Ltd
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 Mullard Radio Valve Co Ltd filed Critical Mullard Radio Valve Co Ltd
Priority to GB11688/42A priority Critical patent/GB560155A/en
Priority to US504315A priority patent/US2341483A/en
Publication of GB560155A publication Critical patent/GB560155A/en
Expired legal-status Critical Current

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.
GB11688/42A 1942-08-19 1942-08-19 Improvements relating to getters for electron discharge tubes Expired GB560155A (en)

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)

* Cited by examiner, † Cited by third party
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)

* Cited by examiner, † Cited by third party
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

Cited By (1)

* Cited by examiner, † Cited by third party
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

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