GB554172A - Improvements in or relating to beam deflecting circuits for cathode-ray tubes - Google Patents

Improvements in or relating to beam deflecting circuits for cathode-ray tubes

Info

Publication number
GB554172A
GB554172A GB376/42A GB37642A GB554172A GB 554172 A GB554172 A GB 554172A GB 376/42 A GB376/42 A GB 376/42A GB 37642 A GB37642 A GB 37642A GB 554172 A GB554172 A GB 554172A
Authority
GB
United Kingdom
Prior art keywords
coils
resistance
current
valve
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
GB376/42A
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.)
Koninklijke Philips NV
Original Assignee
Philips Gloeilampenfabrieken NV
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 Philips Gloeilampenfabrieken NV filed Critical Philips Gloeilampenfabrieken NV
Publication of GB554172A publication Critical patent/GB554172A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N3/00—Scanning details of television systems; Combination thereof with generation of supply voltages
    • H04N3/10—Scanning details of television systems; Combination thereof with generation of supply voltages by means not exclusively optical-mechanical
    • H04N3/16—Scanning details of television systems; Combination thereof with generation of supply voltages by means not exclusively optical-mechanical by deflecting electron beam in cathode-ray tube, e.g. scanning corrections
    • H04N3/22—Circuits for controlling dimensions, shape or centering of picture on screen
    • H04N3/227—Centering
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
    • F16B13/00—Dowels or other devices fastened in walls or the like by inserting them in holes made therein for that purpose
    • F16B13/12—Separate metal or non-separate or non-metal dowel sleeves fastened by inserting the screw, nail or the like
    • F16B13/124—Separate metal or non-separate or non-metal dowel sleeves fastened by inserting the screw, nail or the like fastened by inserting a threaded element, e.g. screw or bolt
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N3/00—Scanning details of television systems; Combination thereof with generation of supply voltages
    • H04N3/10—Scanning details of television systems; Combination thereof with generation of supply voltages by means not exclusively optical-mechanical
    • H04N3/16—Scanning details of television systems; Combination thereof with generation of supply voltages by means not exclusively optical-mechanical by deflecting electron beam in cathode-ray tube, e.g. scanning corrections
    • H04N3/22—Circuits for controlling dimensions, shape or centering of picture on screen
    • H04N3/23—Distortion correction, e.g. for pincushion distortion correction, S-correction
    • H04N3/237—Distortion correction, e.g. for pincushion distortion correction, S-correction using passive elements, e.g. diodes

Landscapes

  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Video Image Reproduction Devices For Color Tv Systems (AREA)

Abstract

554,172. Valve generating circuits. PHILIPS LAMPS, Ltd. (Naamlooze Vennootschap Philips' Gloeilampenfabrieken). Jan. 9, 1942, No. 376. [Class 40 (v)] In a valve circuit for supplying current to the deflecting-coils of a cathode-ray tube, the anode circuit is branched so that only a small adjustable fraction of the direct supply current passes through the coils, the branches being so proportioned that the deflection current is not distorted. Saw-tooth voltage is fed to the control grid 3 of the valve, and the resulting sawtooth current in the anode circuit divides between the branch comprising an adjustable resistance 6, the deflecting-coils 7, and a large condenser 8, and a second higher-impedance branch comprising resistance 9, choke coil 10, and condenser 11 across the HT supply. Distortion is avoided by making the ratio of inductance to resistance the same for both branches. A variable resistance 14 always high compared with the resistances 6, 9 is connected between HT+ and the junction 12 of the coils 7 and condenser 8, which junction is connected to the screen grid 13 of the valve. By suitable adjustment of the resistance 14 the screen-grid can be given the same voltage as the mean anode voltage, and no direct current then passes through the coils 7. Adjustment of the resistance 15 on either side of this value controls the direction and the amount of direct current in the coils, and permits correct positioning of the spot on the screen of the cathode-ray tube.
GB376/42A 1940-10-03 1942-01-09 Improvements in or relating to beam deflecting circuits for cathode-ray tubes Expired GB554172A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NL605120X 1940-10-03

Publications (1)

Publication Number Publication Date
GB554172A true GB554172A (en) 1943-06-23

Family

ID=19787904

Family Applications (2)

Application Number Title Priority Date Filing Date
GB376/42A Expired GB554172A (en) 1940-10-03 1942-01-09 Improvements in or relating to beam deflecting circuits for cathode-ray tubes
GB33930/45A Expired GB605120A (en) 1940-10-03 1945-12-14 Improvements in or relating to beam-deflecting circuits for cathode-ray tubes

Family Applications After (1)

Application Number Title Priority Date Filing Date
GB33930/45A Expired GB605120A (en) 1940-10-03 1945-12-14 Improvements in or relating to beam-deflecting circuits for cathode-ray tubes

Country Status (4)

Country Link
BE (1) BE442945A (en)
FR (1) FR875694A (en)
GB (2) GB554172A (en)
NL (2) NL99104C (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1992000431A1 (en) * 1990-06-22 1992-01-09 Moegel Helmut Floor covering

Also Published As

Publication number Publication date
BE442945A (en)
GB605120A (en) 1948-07-16
FR875694A (en) 1942-09-30
NL99104C (en)
NL216506A (en)

Similar Documents

Publication Publication Date Title
GB463253A (en) Improvements in or relating to circuit arrangements for cathode ray tube apparatus
GB542994A (en) Electron-beam deflecting circuits
GB494839A (en) Improvements in and relating to cathode ray apparatus
US2588659A (en) High-voltage supply
US2644103A (en) Television deflection system
GB554172A (en) Improvements in or relating to beam deflecting circuits for cathode-ray tubes
GB577216A (en) Improvements in or relating to electric circuits for producing currents of sawtooth wave form
GB607079A (en) Improved arrangement for supplying a sawtooth current to the deflecting coils of a cathode-ray tube
US4028589A (en) Circuit arrangement in a television receiver, provided with a line deflection circuit and a switched supply voltage circuit
US2407853A (en) Power supply regulating apparatus
GB534465A (en) Improvements in or relating to magnetic focussing arrangements for cathode ray tubes
GB374913A (en) Improvements in and relating to x-ray equipments
US2055591A (en) Method of producing oscillations of high frequency
GB533301A (en) Improvements in or relating to magnetic deflecting systems for cathode ray tubes
US3435279A (en) Circuit arrangement for producing a sawtooth current through a deflection coil and a high voltage
GB355978A (en)
GB679124A (en) Improvements in or relating to cathode-ray tube circuits
US2129738A (en) Picture transmission system
GB690968A (en) Periodic-wave generator
GB610910A (en) Improvements in or relating to apparatus incorporating a cathode ray device, particularly television receivers
GB745832A (en) Stabilised deflection-amplifier system for a television receiver
GB520489A (en) Improvements in or relating to deflecting circuits for use with cathode ray tubes
GB646074A (en) Improvements in or relating to cathode ray tubes and circuit arrangements therefor
GB503502A (en) Improvements in or relating to cathode ray tubes
GB643150A (en) Improvements relating to beam-deflecting circuits for cathode ray tubes