EP 0302995 B1 19940608 - Magnetic shunt for deflection yokes.
Title (en)
Magnetic shunt for deflection yokes.
Title (de)
Magnetischer Shunt für Ablenkjoche.
Title (fr)
Shunt magnétique pour bobines de déviation.
Publication
Application
Priority
US 8494987 A 19870813
Abstract (en)
[origin: EP0302995A1] Apparatus for reducing net distributed magnetic radiation in front of a cathode ray apparatus screen (14). In such cathode ray apparatus a deflection coil (16,18) is provided having axially aligned (22,24, 26,28) and circumferentially aligned (32,34,36,38) wire segments, relative to the central axis thereof, producing a distributed magnetic field in front of the screen which is undesirable. The invention provides a magnetic shunt (50) disposed between the deflection coil and the screen, the shunt comprising a magnetically permeable material having its configuration and position relative to the coil optimized to maximize cancellation of the net distributed magnetic field at a selected point in space in front of said coil, so as to provide optimised overall magnetic field reduction through the action of the shunt.
IPC 1-7
IPC 8 full level
H01J 29/76 (2006.01); H01J 29/00 (2006.01)
CPC (source: EP KR)
H01J 29/003 (2013.01 - EP); H01J 29/70 (2013.01 - KR); H01J 2229/0015 (2013.01 - EP)
Citation (examination)
EP 0220777 A1 19870506 - PHILIPS NV [NL]
Designated contracting state (EPC)
BE CH DE ES FR GB IT LI NL SE
DOCDB simple family (publication)
EP 0302995 A1 19890215; EP 0302995 B1 19940608; AU 2055588 A 19890216; AU 600158 B2 19900802; BR 8802943 A 19890221; CA 1306281 C 19920811; CN 1021172 C 19930609; CN 1031297 A 19890222; DE 3889997 D1 19940714; DE 3889997 T2 19941201; GB 2208034 A 19890215; GB 8807138 D0 19880427; HK 119794 A 19941111; IE 63796 B1 19950614; IE 882459 L 19890213; IN 175123 B 19950422; JP 2645572 B2 19970825; JP S6445046 A 19890217; KR 890004381 A 19890421; KR 930000388 B1 19930116; MX 169727 B 19930721; NZ 225468 A 19901127
DOCDB simple family (application)
EP 88105077 A 19880329; AU 2055588 A 19880808; BR 8802943 A 19880616; CA 572711 A 19880721; CN 88104372 A 19880712; DE 3889997 T 19880329; GB 8807138 A 19880325; HK 119794 A 19941103; IE 245988 A 19880812; IN 718DE1988 A 19880822; JP 17200788 A 19880712; KR 880008673 A 19880713; MX 1258988 A 19880808; NZ 22546888 A 19880719