Composite wire, coil and deflection unit for HF applications

• US 4,692,731 A
• Filed: 04/03/1986
• Issued: 09/08/1987
• Est. Priority Date: 04/04/1985
• Status: Expired due to Fees

• Current Assignee: US Philips Corporation (Koninklijke Philips N.V.)
• Original Assignee: US Philips Corporation (Koninklijke Philips N.V.)
• Inventors: Osinga, Halbe
• Primary Examiner(s): NOT, DEFINED
• Application Number:
  US06/847,988
• Time in Patent Office: 523 Days
• Field of Search: 335/210, 335/213, 335/299, 174/114 R
• US Class Current: 335/299
• CPC Class Codes: H01B 7/303 Conductors comprising interwire insulation
• CPC Class Codes: H01F 5/00 Coils superconducting coils H01F6/06; fixed inductances of the signal type H01F17/00
• CPC Class Codes: H01J 2229/7031 Cores for field producing elements, e.g. ferrite
• CPC Class Codes: H01J 29/762 using saddle coils or printed windings coils per se H01F
• CPC Class Codes: Y10S 174/13 High voltage cable, e.g. above 10kv, corona prevention
• CPC Class Codes: Y10S 174/26 having a plural-layer insulation system

Abstract

A composite wire which consists of a number of preferably parallel extending single wire strands bundled to form one solid assembly at least one of which is a bare wire. The composite wire (8) is formed from a bare wire (15) around whch a number, for example, five, or more, single wire strands (9-14) having a thin insulating layer are arranged in the form of a bundle. The assembly is surrounded by a layer of an electrically insulating material, which itself may be surrounded by a layer of a thermoplastic material. The composite wire is particularly suitable for winding saddle-shaped deflection coils for deflection units for cathode ray tubes.

Claims

1. A composite wire for high-frequency applications, comprising:

at least one bare wire strand and a plurality of single wire strands of electrically conductive material;

each of the single wire strands having a thin insulating layer and extending in pre-determined parallel positions with respect to each other and parallel to the length of the composite wire;

all of said wire strands being bundled to form a solid assembly; and

a layer of electrically insulating material enveloping such solid assembly.

2. A composite wire as claimed in claim 1, characterized in that the single wire strand extend in parallel.

3. A composite wire as claimed in claim 2, characterized in that the single wire strands are arranged in a bundle around the bare wire strand at the center of such bundle.

4. A composite wire as claimed in claim 3, characterized in that there are at least five of the single wire strands.

5. A composite wire as claimed in claim 3, characterized in that the single wire strands are bundled to form one assembly by means of a layer of lacquer.

6. A composite wire as claimed in claim 1, characterized in that the composite wire has a conductor cross-section which is at most 20% smaller than the conductor cross-section of a single wire having the same outside diameter.

7. A coil wound from a composite wire as claimed in claim 1.

8. A cathode ray tube deflection coil of the saddle type wound from a composite wire, such composite wire comprising:

at least one bare wire strand and a plurality of single wire strands of electrically conductive material;

each of the single wire strands having a thin insulating layer and extending in pre-determined parallel positions with respect to each other and parallel to the length of the composite wire;

all of said wire strands being bundled to form a solid assembly, and a layer of electrically insulating material enveloping such solid assembly.

9. A deflection unit as claimed in claim 8, characterized in that the single wire strands of the composite wire extend in parallel.

10. A deflection coil as claimed in claim 9, characterized in that the single wire strands are arranged in a bundle around the bare wire strand at the center of such bundle.

11. A deflection coil as claimed in claim 10, characterized in that there are at least five of the single wire strands.

12. A deflection unit as claimed in claim 10, characterized in that the single wires are bundled to form one assembly by means of a layer of lacquer.

13. A deflection unit as claimed in claim 8, characterized in that the composite wire has a conductor cross-section which is at most 20% smaller than the conductor cross-section of a single wire strand of the same outside diameter.