GB418940A - Improvements in or relating to cathode ray tube apparatus for use in television and like systems - Google Patents
Improvements in or relating to cathode ray tube apparatus for use in television and like systemsInfo
- Publication number
- GB418940A GB418940A GB33686/33A GB3368633A GB418940A GB 418940 A GB418940 A GB 418940A GB 33686/33 A GB33686/33 A GB 33686/33A GB 3368633 A GB3368633 A GB 3368633A GB 418940 A GB418940 A GB 418940A
- Authority
- GB
- United Kingdom
- Prior art keywords
- coils
- ray
- television
- cathode
- chokes
- 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
Links
- 230000004048 modification Effects 0.000 abstract 1
- 238000012986 modification Methods 0.000 abstract 1
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
-
- 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
- H01J29/54—Arrangements for centring ray or beam
Landscapes
- Engineering & Computer Science (AREA)
- Multimedia (AREA)
- Signal Processing (AREA)
- Video Image Reproduction Devices For Color Tv Systems (AREA)
- Details Of Television Scanning (AREA)
Abstract
418,940. Cathode-ray tubes; television. MARCONI'S WIRELESS TELEGRAPH CO., Ltd., Electra House, Victoria Embankment, London.-(Assignees of Morlock, W. J. ; 16, Conard Avenue, Collingswood, New Jersey, U.S.A.) Nov. 30, 1933, No. 33686. Convention date, Nov. 30, 1932. [Classes 39 (i) and 40 (iii).] In television &c. apparatus in which a cathode ray is deflected electromagnetically to scan a screen and in which an auxiliary steady deflecting field is provided to adjust the mean position of the ray and so to compensate for errors of alignment in the electron gun, the coils 20, 22, Fig. 2, carrying A.C. to cause the ray to scan the screen are also supplied through chokes 44, 46 with D.C. to produce the auxiliary field. The coils 20, 22 may be arranged in symmetrically opposed pairs on four polepieces on a ring-shaped core surrounding the cathode-ray tube. Rheostats 48, 50 provide adjustment of the D.C. The chokes 44, 46 preventing the flow of A.C. through the D.C. supplies 30<a>, 30<b> may be replaced by condensers at 40, 42 preventing the flow of D.C. in the A.C. supplies. In a modification, Fig. 4, the output valve 60 of the generator 62 of scanning potentials is fed through a choke 58 and feeds A.C. through the deflecting coils 20 and through a condenser 66. The direction and magnitude of the D.C. through the coils 20 is adjusted by a contact 64 on a potentiometer 56, and a separate, similar supply is provided for the other pair of coils 22.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US644931A US2007380A (en) | 1932-11-30 | 1932-11-30 | Cathode ray apparatus |
Publications (1)
Publication Number | Publication Date |
---|---|
GB418940A true GB418940A (en) | 1934-11-02 |
Family
ID=24586942
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB33686/33A Expired GB418940A (en) | 1932-11-30 | 1933-11-30 | Improvements in or relating to cathode ray tube apparatus for use in television and like systems |
Country Status (3)
Country | Link |
---|---|
US (1) | US2007380A (en) |
DE (1) | DE765692C (en) |
GB (1) | GB418940A (en) |
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE743024C (en) * | 1938-08-06 | 1943-12-16 | Fernseh Gmbh | Device for blocking the cathode ray |
DE745500C (en) * | 1936-06-18 | 1944-11-25 | Arrangement for the magnetic deflection of the beam in a cathode ray tube for television purposes | |
DE750218C (en) * | 1935-10-31 | 1945-01-04 | Rca Corp | Device for the electromagnetic deflection of a cathode ray bundle |
DE746970C (en) * | 1936-06-14 | 1953-02-23 | Lorenz C Ag | Circuit for the generation of saw-tooth-shaped currents for the magnetic deflection of Braun tubes |
DE972328C (en) * | 1937-10-23 | 1959-07-16 | Fernseh Gmbh | Arrangement for shifting the grid in television tubes |
Families Citing this family (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
BE440984A (en) * | 1939-08-09 | |||
US2629866A (en) * | 1942-09-19 | 1953-02-24 | Robert M Page | Position indicating apparatus |
US2559657A (en) * | 1942-09-19 | 1951-07-10 | Robert M Page | Sweep generation |
US2443025A (en) * | 1945-07-30 | 1948-06-08 | Gen Electric | Cathode-ray apparatus |
GB665096A (en) * | 1947-07-31 | 1952-01-16 | Emi Ltd | Improvements in or relating to television receiving apparatus |
US2561586A (en) * | 1948-02-11 | 1951-07-24 | Philco Corp | Deflection circuit for cathode-ray tubes |
NL81418C (en) * | 1950-02-14 | |||
NL94740C (en) * | 1952-03-10 | |||
NL140650B (en) * | 1964-02-12 | 1973-12-17 | Hollandse Signaalapparaten Bv | DEFLECTION SYSTEM FOR A CATHOD RADIUS TUBE WHICH SYSTEM EQUIPPES EACH DEFLECTION COIL WITH RESISTANT MEANS FOR CANCELLATION OF REMANENT MAGNETISM IN THE FERROMAGNETIC CORE OF THE NORMALITER CRITICALLY MUFFLED. |
Family Cites Families (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US1613954A (en) * | 1923-06-20 | 1927-01-11 | Western Electric Co | Sweep circuits for cathode-ray oscillographs |
FR747139A (en) * | 1931-11-10 | 1933-06-12 | Devices for deflecting electronic currents in cathode ray tubes | |
AT135287B (en) * | 1931-12-12 | 1933-11-10 | Telefunken Gmbh | Device for synchronizing cathode ray recorders. |
USRE21400E (en) * | 1932-04-04 | 1940-03-19 | blumlein |
-
1932
- 1932-11-30 US US644931A patent/US2007380A/en not_active Expired - Lifetime
-
1933
- 1933-11-30 GB GB33686/33A patent/GB418940A/en not_active Expired
-
1934
- 1934-02-08 DE DER89857D patent/DE765692C/en not_active Expired
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE750218C (en) * | 1935-10-31 | 1945-01-04 | Rca Corp | Device for the electromagnetic deflection of a cathode ray bundle |
DE746970C (en) * | 1936-06-14 | 1953-02-23 | Lorenz C Ag | Circuit for the generation of saw-tooth-shaped currents for the magnetic deflection of Braun tubes |
DE745500C (en) * | 1936-06-18 | 1944-11-25 | Arrangement for the magnetic deflection of the beam in a cathode ray tube for television purposes | |
DE972328C (en) * | 1937-10-23 | 1959-07-16 | Fernseh Gmbh | Arrangement for shifting the grid in television tubes |
DE743024C (en) * | 1938-08-06 | 1943-12-16 | Fernseh Gmbh | Device for blocking the cathode ray |
Also Published As
Publication number | Publication date |
---|---|
US2007380A (en) | 1935-07-09 |
DE765692C (en) | 1952-06-05 |
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