Winding method for the non-radial winding of a cathode tube deflector and a deflector made thereby

• US 5,165,614 A
• Filed: 07/01/1991
• Issued: 11/24/1992
• Est. Priority Date: 03/23/1987
• Status: Expired due to Term

• Current Assignee: Videocolor SA (Vantiva SA)
• Original Assignee: Videocolor SA (Vantiva SA)
• Inventors: Fourche, Jean-Pierre
• Primary Examiner(s): Stodola, Daniel P.
• Assistant Examiner(s): BATTISTA JR, WILLIAM
• Application Number:
  US07/724,434
• Time in Patent Office: 512 Days
• Field of Search: 242/4 A, 242/4 B, 242/4 BC, 242/4 R, 242/7.02, 242/7.03, 242/7.06, 242/7.07, 242/7.09, 242/7.13, 242/7.14, 242/7.15, 242/54 A, 29/605, 335/213
• US Class Current: 242/437.3
• CPC Class Codes: H01J 2209/2366 Machines therefor, e.g. winding, forming, welding, or the like
• CPC Class Codes: H01J 9/236 Manufacture of magnetic deflecting devices for cathode-ray tubes
• CPC Class Codes: Y10T 29/49071 by winding or coiling

Abstract

To avoid the use of adhesives or notched parts when winding the non-radial layers of a cathode tube deflector, first a radial layer with a wide pitch is wound. This first radial layer then presents notches for winding the folllowing layers of the non-radial coil.

Claims

1. A winding method for the non-radial winding of wires to form a coil for a cathode tube deflector wherein said cathode tube deflector has at least a first half-core, wherein said at least first half-core has a center of radius, said method comprising the steps of:

winding a first layer of said coil which is substantially radial to said center, at a pitch which is greater in the middle of said first layer than at the ends of said layer; and

winding a non-radial second layer on said first layer, wherein at least a portion of said wires in said first layer prevent said second layer from slipping.

2. A deflector for a cathode ray tube comprising:

a toroidal winding wound on a core, said winding having a substantially radially wound first layer on said core, and a second layer wound on said first layer, said second layer being non-radial,

said first layer having a pitch which is greater in the middle of said layer than at the ends of said layer.