High-voltage inductive coil

Claim 2

High-voltage AC inductive coil, comprising in combination a large plurality of winding turns beginning at the inside of said coil and including multi-turn layers of an electrical conductor for developing a high-voltage output, the first turn of said winding turns comprising a unitary strip having a beginning and an ending and extending laterally substantially the entire width of said multiturn layers, said ending overlapping said beginning and being insulated at said area of overlap, and means for connecting a lead conductor to said beginning of the first turn.

Claim 3

An inductive coil according to claim 1, further comprising first electrically insulating sleeve means for supporting said windings and being adapted to receive a magnetic core therein.

Claim 4

An inductive coil according to claim 2, further comprising second insulating means located between each of said layers, and third insulating means for separating each turn of said conductor from the others.

Claim 5

An inductive coil according to claim 3, further comprising electrically conductive means for connecting said lead conductor of said first turn to ground.

Claim 6

An inductive coil according to claim 4, wherein said conductive means is connected to said magnetic core.

Claim 7

An inductive coil according to claim 3, further comprising at least a last turn of said winding turns comprising a unitary strip having a beginning and an ending and extending laterally substantially the entire width of said multiturn layers, said ending overlapping said beginning and being insulated at said area of overlap, and means for connecting a lead conductor to the outside end of said coil.

Claim 8

An inductive coil according to claim 4, further comprising at least a last turn of said winding turns comprising a unitary strip having a beginning and ending and extending laterally substantially the entire width of said multiturn layers, said ending overlapping said beginning and being insulated at said area of overlap, and means for connecting a lead conductor to the outside end of said coil.

Claim 9

An inductive coil according to claim 5, further comprising at least a last turn of said winding turns comprising a unitary strip having a beginning and and ending and extending laterally substantially the entire width of said multiturn layers, said ending overlapping said beginning and being insulated at said area of overlap, and means for connecting a lead to the outside end of said coil.

Claim 10

High-voltage AC inductive coil adapted for use in a secondary winding of a transformer for use in an ignition system including a continuous square-wave-type oscillator, comprising in combination a large plurality of winding turns beginning at the inside of said coil and including multiturn layers of an electrical conductor for developing a high-voltage output, at least the first complete turn of said winding turns comprising a unitary strip having a beginning and an ending and extending laterally substantially the entire width of said multiturn layers, said ending overlapping said beginning and being insulated at said area of overlap, means for connecting a lead conductor to said beginning of the first turn, an electrically insulating sleeve for having said windings wound thereon and adapted to receive a magnetic core therein, an insulating-material layer located between each of said winding layers, insulating means for separating each of said turns from the others, at least a last complete turn of said winding turns comprising a unitary strip having a beginning and an ending and extending laterally substantially the entire width of said multiturn layers and said ending overlapping said beginning and being insulated at said area of overlap, and means for connecting a lead to the outside end of said coil, an electrically conductive lead connector for making an electrical connection between said beginning of said first turn and ground, said ground including said magnetic core.

Claim 11

High-voltage AC inductive coil adapted for use in a secondary winding of a transformer for use in an ignition system including a continuous square-wave-type oscillator, comprising in combination a large plurality of winding turns beginning at the inside of said coil and including multiturn layers of an electrical conductor for developing a high-voltage output, at least the first complete turn of said winding turns comprising a unitary strip having a beginning and an ending and extending laterally substantially the entire width of said multiturn layers, said ending overlapping said beginning and being insulated at said area of overlap, means for connecting a lead conductor to said beginning of the first turn, an electrically insulating sleeve for having said windings wound thereon and adapted to receive a magnetic core therein, an insulating-material layer located between each of said winding layers, insulating means for separating each of said turns from the others, at least a last complete turn of said winding turns comprising a unitary strip having a beginning and an ending and extending laterally substantially the entire width of said multiturn layers and said ending overlapping said beginning and being insulated at said area of overlap, and means for connecting a lead to the outside end of said coil, an electrically conductive lead connector for making an electrical connection between said beginning of said first turn and ground, said ground including said magnetic core.

Claim 12

In a transformer for use with an ignition system, employing a square-wave oscillator operating a frequency on the order of 10,000 Hertz, a high voltage AC output winding having means for avoiding insulation burnout, comprising a core tube for supporting said winding thereon and adapted to receive a magnetic core therethrough, a conductive-material strip forming the inside first turn of said winding and having a beginning and an ending and being at least as wide as said winding, said strip being wound around said core tube with said ending overlapping said beginning, electrical insulating means for separating said overlapping portions of said strip, the remainder of said winding being wound as multiturn layers in continuation of said first turn and lying over said strip with the inner end thereof being electrically connected to said strip ending so that said strip forms the first turn of said winding, and means for making an electrical circuit connection to the beginning of said strip.

Claim 13

In a transformer for use with an ignition system, employing a square-wave oscillator operating a frequency on the order of 10,000 Hertz, a high voltage AC output winding having means for avoiding insulation burnout, comprising a core tube for supporting said winding thereon and adapted to receive a magnetic core therethrough, a conductive-material strip forming the inside first turn of said winding and having a beginning and an ending and being at least as wide as said winding, said strip being wound around said core tube with said ending overlapping said beginning, electrical insulating means for separating said overlapping portions of said strip, the remainder of said winding being wound as multiturn layers in continuation of said first turn and lying over said strip with the inner end thereof being electrically connected to said strip ending so that said strip forms the first turn of said winding, and means for making an electrical circuit connection to the beginning of said strip.

Claim 14

The invention according to claim 10, wherein said means for making an electrical circuit connection comprises a circuit connection to said magnetic core.

Claim 15

The invention according to claim 11, wherein said means for avoiding insulation burn-out also comprises a second conductive-material strip forming at least the last turn of said winding and having a beginning and an ending and being at least as wide as said winding, said second strip being wound around the outside of said winding with said beginning electrically connected to the outside end of said winding, said second strip being more than one full turn of said winding and electrical insulating means for separating said overlapping portions of said second strip.