GB542497A - Improvements in or relating to electron discharge devices - Google Patents

Improvements in or relating to electron discharge devices

Info

Publication number
GB542497A
GB542497A GB5441/41A GB544141A GB542497A GB 542497 A GB542497 A GB 542497A GB 5441/41 A GB5441/41 A GB 5441/41A GB 544141 A GB544141 A GB 544141A GB 542497 A GB542497 A GB 542497A
Authority
GB
United Kingdom
Prior art keywords
electrodes
ray
scanning
resistance
cathode
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
GB5441/41A
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.)
GEORGE STANLEY PERCIVAL FREEMA
Original Assignee
GEORGE STANLEY PERCIVAL FREEMA
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 GEORGE STANLEY PERCIVAL FREEMA filed Critical GEORGE STANLEY PERCIVAL FREEMA
Publication of GB542497A publication Critical patent/GB542497A/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
    • H01J29/46—Arrangements of electrodes and associated parts for generating or controlling the ray or beam, e.g. electron-optical arrangement
    • H01J29/52—Arrangements for controlling intensity of ray or beam, e.g. for modulation
    • 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
    • H01J29/46—Arrangements of electrodes and associated parts for generating or controlling the ray or beam, e.g. electron-optical arrangement
    • H01J29/70—Arrangements for deflecting ray or beam
    • H01J29/72—Arrangements for deflecting ray or beam along one straight line or along two perpendicular straight lines
    • H01J29/74—Deflecting by electric fields only
    • 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
    • H01J29/84—Traps for removing or diverting unwanted particles, e.g. negative ions, fringing electrons; Arrangements for velocity or mass selection

Landscapes

  • Cathode-Ray Tubes And Fluorescent Screens For Display (AREA)
  • Image-Pickup Tubes, Image-Amplification Tubes, And Storage Tubes (AREA)

Abstract

542,497. Cathode-ray tubes; scanning circuits. McGEE, J. D., MILLER, H., and FREEMAN, G. S. P. May 2, 1940, No. 5441/41. Divided out of 542,488. [Classes 39 (i) and 40 (iii)] [Also in Group XXXVI] In connection with a cathode-ray tube in which the ray is projected within a uniform axially directed magnetic field, for example as described in Specification 530,409, and scanning deflections are imparted to the ray by a transverse electrostatic field between a pair of electrodes 5, the circuit supplying the scanning voltages to the electrodes 5 is provided with means for adjusting the voltage relation of the electrodes to adjust the neutral or central position of the scanning field. As shown in Fig. 1, the electrodes 5 are connected to the ends of a high resistance 11 fed in push-pull through condensers 7 from tubes 8 having load resistances 9. A centre tapping 12 on the resistance 11 is connected to the bias voltage source 6 to which is also connected the anode 4 of the cathode-ray tube; and this tapping is adjustable. In a modification, the condensers 7 and resistances 9 are omitted, the resistance 11 being connected directly to the tubes 8 to act as load resistance therefor, and the tapping connections being consequentially modified. Specification 542,219 also is referred to.
GB5441/41A 1940-05-02 1940-05-02 Improvements in or relating to electron discharge devices Expired GB542497A (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
GB233060X 1940-05-02
GB290441X 1941-04-29
GB10541X 1941-05-01

Publications (1)

Publication Number Publication Date
GB542497A true GB542497A (en) 1942-01-12

Family

ID=27253814

Family Applications (3)

Application Number Title Priority Date Filing Date
GB5440/41A Expired GB542496A (en) 1940-05-02 1940-05-02 Improvements in or relating to electron discharge devices
GB5441/41A Expired GB542497A (en) 1940-05-02 1940-05-02 Improvements in or relating to electron discharge devices
GB7892/40A Expired GB542488A (en) 1940-05-02 1940-05-02 Improvements in or relating to electron discharge devices

Family Applications Before (1)

Application Number Title Priority Date Filing Date
GB5440/41A Expired GB542496A (en) 1940-05-02 1940-05-02 Improvements in or relating to electron discharge devices

Family Applications After (1)

Application Number Title Priority Date Filing Date
GB7892/40A Expired GB542488A (en) 1940-05-02 1940-05-02 Improvements in or relating to electron discharge devices

Country Status (4)

Country Link
US (1) US2302786A (en)
CH (1) CH233060A (en)
FR (1) FR907691A (en)
GB (3) GB542496A (en)

Families Citing this family (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2551810A (en) * 1947-07-09 1951-05-08 Rca Corp Deflection beam tube
US2969478A (en) * 1949-06-10 1961-01-24 Sperry Rand Corp Information storage system
BE502471A (en) * 1950-04-12
US2609516A (en) * 1950-10-31 1952-09-02 Rca Corp Art of forming and utilizing electron-beams of noncircular cross section
BE519629A (en) * 1952-05-02
US2811668A (en) * 1956-05-29 1957-10-29 Gen Dynamics Corp Electron beam deflection control system
US2888606A (en) * 1956-08-27 1959-05-26 Rca Corp Modulation control for cathode ray tubes
FR1281982A (en) * 1960-11-23 1962-01-19 Csf Deflection modulator for cathode ray tubes
GB1087323A (en) * 1964-05-22 1967-10-18 English Electric Valve Co Ltd Improvements in or relating to electron beam discharge tubes
US4549113A (en) * 1981-02-06 1985-10-22 U.S. Philips Corporation Low noise electron gun
GB2137802B (en) * 1983-01-27 1986-06-04 Thor Cryogenics Ltd Electron filter

Also Published As

Publication number Publication date
GB542496A (en) 1942-01-12
CH233060A (en) 1944-06-30
US2302786A (en) 1942-11-24
FR907691A (en) 1946-03-19
GB542488A (en) 1942-01-12

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