The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Mar. 08, 1988
Filed:
Jul. 25, 1986
Aant B van der Meer, Eindhoven, NL;
Theodorus G Stijntjes, Eindhoven, NL;
U.S. Philips Corporation, New York, NY (US);
Abstract
A deflection unit (6) for a cathode-ray tube having a yoke ring (9) of a sintered, oxidic, ferromagnetic material. The yoke ring has a reduced wall thickness with respect to the wall thickness of conventional yoke rings, such reduced thickness being less than 6 mm and preferably in the range from 2 to 4 mm, and yet the ring is of sufficient mechanical rigidity because it is essentially stress-free. That may be achieved by sintering and cooling the yoke ring so that the oxygen content near the surface differs very little from that in the interior thereof, or so that a substantial difference in oxygen content is only present in a very thin surface layer thereof.