Deflection unit for a cathode ray tube and method of manufacturing a saddle-shaped deflection coil
AssigneeKoninklijke Philips Electronics N.V.
InventorsHans Piek, Johannes Penninga, Nicolaas Gerrit Vink
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Abstract
A deflection unit (4) includes a saddle-shaped deflection coil (30). The deflection coil includes at either the front or rear end a concave part having a left and right corner (41, 42) which define a line (43). The concave part is flanked at either side by adjacent portions (38, 39). It holds that: α>β where α angle between a line (43) through the two corners (40, 41) of the concave part (40) and inner windings of the concave part (40), and β is an angle between said line (43) and the inner windings at the outer side of a corner (41,42).
Claims6
A deflection unit (4) having at least one saddle-shaped coil (6, 7, 15, 15′) having coil portions, and winding windows (19, 22), the coil portions comprising a front end portion (8,9, 16,17) and a rear end portion (11, 12), at least one of the end portions having a part (18, 28, 40) which has a concave shape between two corners (20, 21, 41, 42), characterized in that the following relation holds for the part (18, 28, 40) having a concave shape:
- α>β
- where α is an angle between a line (43) through the two corners (40, 41) of the concave part (40) and inner windings of the concave part (40), and
- β is an angle between said line (43) and the inner windings at the outer side of a corner (41, 42).
Dependencies are inferred from the claim text.