GB755819A - Improvements in or relating to electron discharge devices - Google Patents

Improvements in or relating to electron discharge devices

Info

Publication number
GB755819A
GB755819A GB37546/54A GB3754654A GB755819A GB 755819 A GB755819 A GB 755819A GB 37546/54 A GB37546/54 A GB 37546/54A GB 3754654 A GB3754654 A GB 3754654A GB 755819 A GB755819 A GB 755819A
Authority
GB
United Kingdom
Prior art keywords
getter
cathode
barium
electrode
switch
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
GB37546/54A
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.)
Rauland Borg Corp
Original Assignee
Rauland Borg 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 Rauland Borg Corp filed Critical Rauland Borg Corp
Publication of GB755819A publication Critical patent/GB755819A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J29/00—Details of cathode-ray tubes or of electron-beam tubes of the types covered by group H01J31/00
    • H01J29/94—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
    • H01J31/00—Cathode ray tubes; Electron beam tubes
    • H01J31/08—Cathode ray tubes; Electron beam tubes having a screen on or from which an image or pattern is formed, picked up, converted, or stored
    • H01J31/10—Image or pattern display tubes, i.e. having electrical input and optical output; Flying-spot tubes for scanning purposes
    • H01J31/12—Image or pattern display tubes, i.e. having electrical input and optical output; Flying-spot tubes for scanning purposes with luminescent screen

Abstract

755,819. Discharge apparatus. RAULAND CORPORATION. Dec. 29, 1954 [Dec. 30, 1953], No. 37546/54. Drawings to Specification. Class 39 (1). A getter which is fired by the passage of current is in series with a thermally responsive switch which is heated by its proximity to an electrode, thus operating to open the circuit. By this means the getter fires each time the tube is brought into use, until such time as the switch has become sufficiently hot to operate. The getter material may be contained in a wire of semi-circular section, or in a completely enclosed container suitably perforated. The getter wire may be wound round an electrode, such as the modulator of a cathode-ray tube, or round glass supports, and may conveniently be in parallel with the cathode heater leads. The switch may be of the bimetallic type, operated by heat from the cathode, or other suitable electrode. Suitable getter materials are barium, magnesium, and aluminium, mixed in the percentage proportion of 25 : 55 : 20 ; or 37 : 37 : 26; or 43 : 20 : 37. If the emissive cathode material is barium, barium from the getter may deposit on the cathode and give longer life.
GB37546/54A 1953-12-30 1954-12-29 Improvements in or relating to electron discharge devices Expired GB755819A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US401127A US2758240A (en) 1953-12-30 1953-12-30 Electron-discharge devices

Publications (1)

Publication Number Publication Date
GB755819A true GB755819A (en) 1956-08-29

Family

ID=23586417

Family Applications (1)

Application Number Title Priority Date Filing Date
GB37546/54A Expired GB755819A (en) 1953-12-30 1954-12-29 Improvements in or relating to electron discharge devices

Country Status (2)

Country Link
US (1) US2758240A (en)
GB (1) GB755819A (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2843777A (en) * 1954-01-28 1958-07-15 Rauland Corp Cathode-ray tubes
US2875361A (en) * 1955-05-31 1959-02-24 Rca Corp Auxiliary heaters to aid in activation of cathode ray type guns
US2919380A (en) * 1957-07-23 1959-12-29 Philco Corp Electron discharge devices

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1739043A (en) * 1926-12-17 1929-12-10 Ruben Patents Company Vacuum-tube relay
US1787300A (en) * 1927-11-16 1930-12-30 Gen Electric Electric-discharge device
US2392969A (en) * 1940-04-16 1946-01-15 Everett H Bickley Photoelectric tube
US2575835A (en) * 1950-05-09 1951-11-20 Du Mont Allen B Lab Inc Cathode-ray tube centering device
US2668253A (en) * 1950-07-06 1954-02-02 American Television Inc Getter for electron discharge devices
US2638559A (en) * 1952-01-19 1953-05-12 Nat Video Corp Electrostatic lens for cathode-ray tubes

Also Published As

Publication number Publication date
US2758240A (en) 1956-08-07

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