Radiant energy – Invisible radiant energy responsive electric signalling – Flow metering
Patent
1994-12-21
1996-06-25
Anderson, Bruce C.
Radiant energy
Invisible radiant energy responsive electric signalling
Flow metering
H01J 37141
Patent
active
055302513
ABSTRACT:
A deflection yoke for controlling a charged particle beam, such as an electron beam, comprises a toroidal core, which may be ferromagnetic material or not, a major yoke winding, and a minor yoke winding. The major and minor yoke windings are arranged to minimize mutual inductance between the major winding and the minor winding. The major yoke winding is a toroidal winding about the core and said minor yoke winding is a saddle winding on said core. In one embodiment, the minor winding comprises a first saddle winding inside the toroidal core and a second saddle winding outside the toroidal core. A reactive shunt is connected across the first saddle winding or the second saddle winding. The reactive shunt provides a shunt current path to balance flex contribution in the core from the first and second saddle windings so that excitation of the minor yoke does not induce any excitation in the major yoke. The toroidal core may comprise one or two alternating stacks of ferromagnetic rings and non-ferromagnetic rings. This construction provides a core that does not perturb a lens field into which the deflection yoke may be placed. The non-ferromagnetic rings are made of a ceramic or other material having a coefficient of thermal expansion matched, or nearly so, to that of the ferromagnetic rings to prevent thermal stresses in the core.
REFERENCES:
patent: 3631902 (1972-01-01), Torsch
patent: 3671896 (1972-06-01), Torsch
patent: 3914608 (1975-10-01), Malmberg
patent: 3984687 (1976-10-01), Loeffler et al.
patent: 4232253 (1980-11-01), Mortelmans
patent: 4395691 (1983-07-01), Knauer
patent: 4431915 (1984-02-01), Nakagawa et al.
patent: 4544846 (1985-10-01), Langner et al.
patent: 4870286 (1989-09-01), Tobuse
patent: 5039922 (1991-08-01), Ogasa et al.
patent: 5136167 (1992-08-01), Langner et al.
patent: 5276331 (1994-01-01), Oae et al.
Anderson Bruce C.
International Business Machines - Corporation
Peterson Jr. Charles W.
LandOfFree
Inductively coupled dual-stage magnetic deflection yoke does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Inductively coupled dual-stage magnetic deflection yoke, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Inductively coupled dual-stage magnetic deflection yoke will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2190831