Winding end turn insulator for a dynamoelectric machine

Claim 2

An end turn insulator for a stator assembly of a dynamoelectric machine including a stator core having axially extending and circumferentially spaced slots, said slots including first and second windings arranged therein which form first and second groups of radially disposed end turns extending axially from the ends of said stator core, said end turn insulator comprising: an elongated insulator body formed of a single sheet of flexible insulation material including oppositely disposed end portions, said end portions having a predetermined overlapping position to form said insulator body in a circular collar to provide an insulating barrier extending axially between adjacent sides of said first and second groups of end turns; and a locking tab means detachably connected to a side edge of said insulator body, said locking tab means including a base side spaced from said side edge and having shoulder portions disposed adjacent said side edge, said locking tab means bending radially outward and being insertable between said first group of end turns and said end of said stator core whereby said shoulder portions extend radially adjacent an outer diameter portion of said first group of end turns and are engaged thereby for aligning and attaching said insulator body to said first group of end turns prior to the assembly of said second winding to said stator core.

Claim 3

An end turn insulator for a stator assembly of a dynamoelectric machine including a stator core having axially extending and circumferentially spaced slots, said slots receiving conductors forming first and second windings respectively including first and second groups of radially disposed end turns extending axially from the ends of said stator core, and wherein predetermined slots are left vacant from the conductors of said first windings so that circumferentially-spaced radial openings are formed between said ends of said stator core and said first group of end turns prior to the assembly of said conductors to said slots for forming said second winding, said end turn insulator comprising: an elongated insulator body formed of a single sheet of flexible insulation material including oppositely disposed end portions, said end portions having a predetermined overlapping position to form said insulator body in a circular collar for covering adjacent sides of said first and second groups of end turns; a plurality of triangularly-shaped locking tabs; and a plurality of narrow strips connecting each of said locking tabs to one side edge of said insulator body, each of said locking tabs including a base side spaced from said one side edge by said narrow strips and having shoulder portions formed on opposite sides of said narrow strips, said plurality of locking tabs being circumferentially spaced around said circular collar in alignment with said circumferentially-spaced radial openings, and said plurality of locking tabs bending radially outward along said plurality of narrow strips and being insertable through said circumferentially-spaced radial openings whereby said shoulder portions extend radially outside of an outer diameter portion of said first group of end turns and are engaged thereby for retaining said insulator body on said first group of end turns.

Claim 4

An end turn insulator for a stator assembly of a dynamoelectric machine including a stator core having axially extending and circumferentially spaced slots, said slots receiving conductors forming first and second windings respectively including first and second groups of radially disposed end turns extending axially from the ends of said stator core, and wherein predetermined slots are left vacant from the conductors of said first windings so that circumferentially-spaced radial openings are formed between said ends of said stator core and said first group of end turns prior to the assembly of said conductors to said slots for forming said second winding, said end turn insulator comprising: an elongated insulator body formed of a single sheet of flexible insulation material including oppositely disposed end portions, said end portions having a predetermined overlapping position to form said insulator body in a circular collar for covering adjacent sides of said first and second groups of end turns; a plurality of triangularly-shaped locking tabs; and a plurality of narrow strips connecting each of said locking tabs to one side edge of said insulator body, each of said locking tabs including a base side spaced from said one side edge by said narrow strips and having shoulder portions formed on opposite sides of said narrow strips, said plurality of locking tabs being circumferentially spaced around said circular collar in alignment with said circumferentially-spaced radial openings, and said plurality of locking tabs bending radially outward along said plurality of narrow strips and being insertable through said circumferentially-spaced radial openings whereby said shoulder portions extend radially outside of an outer diameter portion of said first group of end turns and are engaged thereby for retaining said insulator body on said first group of end turns.

Claim 5

An end turn insulator for a dynamoelectric machine having a stator core including axially extending slots receiving first and second field windings forming first and second groups of end turns extending axially from the ends of said stator core wherein said first group of end turns is disposed radially outwardly and adjacent said second group of end turns, said end turn insulator comprising: an elongated insulator body made of a thin sheet of insulation material and including opposite end portions; and three-spaced locking tabs connected by narrow strip portions to a side edge of said insulator body, two of said locking tabs being disposed adjacent said opposite end portions respectively with a third locking tab being disposed therebetween, said opposite end portions having a predetermined overlapping position to form said insulator body in a circular collar whereby said two locking tabs are mutually overlapping, said circular collar including a predetermined diameter to provide insulating covering of the inner diameter of said first group of end turns when said side edge of said insulator body is disposed adjacent the stator end, sand said locking tabs being bendable along said narrow strip portions and radially insertable between said first group of end turns and an end of said stator core at circumferentially-spaced locations thereof wherEby said shoulder portions overhang an outer diameter portion of said first group of end turns and are engaged thereby to align and retain said insulator body against the inner diameter of said first group of end turns and to retain said opposite end portions in said predetermined overlapping relationship.

Claim 6

An end turn insulator for a dynamoelectric machine having a stator core including axially extending slots receiving first and second field windings forming first and second groups of end turns extending axially from the ends of said stator core wherein said first group of end turns is disposed radially outwardly and adjacent said second group of end turns, said end turn insulator comprising: an elongated insulator body made of a thin sheet of insulation material and including opposite end portions; and three-spaced locking tabs connected by narrow strip portions to a side edge of said insulator body, two of said locking tabs being disposed adjacent said opposite end portions respectively with a third locking tab being disposed therebetween, said opposite end portions having a predetermined overlapping position to form said insulator body in a circular collar whereby said two locking tabs are mutually overlapping, said circular collar including a predetermined diameter to provide insulating covering of the inner diameter of said first group of end turns when said side edge of said insulator body is disposed adjacent the stator end, sand said locking tabs being bendable along said narrow strip portions and radially insertable between said first group of end turns and an end of said stator core at circumferentially-spaced locations thereof wherEby said shoulder portions overhang an outer diameter portion of said first group of end turns and are engaged thereby to align and retain said insulator body against the inner diameter of said first group of end turns and to retain said opposite end portions in said predetermined overlapping relationship.

Claim 7

An end turn insulator for a stator assembly of a dynamoelectric machine including a stator core having axially extending and circumferentially-spaced slots receiving a first field winding with preselected slots being left vacant to form circumferentially-spaced radial openings adjacent the ends of the vacant slots and between the stator core and a first group of end turns formed by said first field winding, and said spaced slots further receiving a second field winding which forms a second group of end turns disposed radially inwardly of said first group of end turns, said end turn insulator comprising: an elongated insulator body made of a thin sheet of insulation material and including opposite end portions, said opposite end portions having a predetermined overlapping position to form said insulator body in a circular collar which provides an insulating barrier when mounted between said first and second groups of end turns; at least two locking tabs having a base side disposed adjacent to a side edge of said insulator body; two pairs of spaced strips connecting the base sides of each of said locking tabs to said side edge so that said first and second locking tabs are aligned with two of said circumferentially-spaced radial openings when said body is formed in a circular collar, and said pairs of spaced strips being disposed intermediate the ends of said base sides of said locking tabs so as to define shoulder portions at opposite ends of said base sides; means for interlocking said opposite ends in said predetermined overlapping position including an elongated closed opening formed in one of said opposite end portions and a flap portion formed in the other of said end portions which is insertable through said elongated closed opening, said locking tabs being bendable along said pairs of spaced strips so as to extend radially outwardly from the ends of said circumferentially-spaced radial openings when said circular collar formed by said body covers the inner diameter of said first group of end turns and said paris of spaced strips are disposed within said circumferentially-spaced radial openings so that said shoulder portions of said locking tabs are engaged by an outer diameter portion of said first group of end turns prior to the assembly of said second winding, and said locking tabs being detachable by breaking along said spaced strips following assembly of said second winding in the spaced slots of said stator core.

Claim 8

An end turn insulator for a stator assembly of a dynamoelectric machine including a stator core having axially extending and circumferentially-spaced slots receiving a first field winding with preselected slots being left vacant to form circumferentially-spaced radial openings adjacent the ends of the vacant slots and between the stator core and a first group of end turns formed by said first field winding, and said spaced slots further receiving a second field winding which forms a second group of end turns disposed radially inwardly of said first group of end turns, said end turn insulator comprising: an elongated insulator body made of a thin sheet of insulation material and including opposite end portions, said opposite end portions having a predetermined overlapping position to form said insulator body in a circular collar which provides an insulating barrier when mounted between said first and second groups of end turns; at least two locking tabs having a base side disposed adjacent to a side edge of said insulator body; two pairs of spaced strips connecting the base sides of each of said locking tabs to said side edge so that said first and second locking tabs are aligned with two of said circumferentially-spaced radial openings when said body is formed in a circular collar, and said pairs of spaced strips being disposed intermediate the ends of said base sides of said locking tabs so as to define shoulder portions at opposite ends of said base sides; means for interlocking said opposite ends in said predetermined overlapping position including an elongated closed opening formed in one of said opposite end portions and a flap portion formed in the other of said end portions which is insertable through said elongated closed opening, said locking tabs being bendable along said pairs of spaced strips so as to extend radially outwardly from the ends of said circumferentially-spaced radial openings when said circular collar formed by said body covers the inner diameter of said first group of end turns and said paris of spaced strips are disposed within said circumferentially-spaced radial openings so that said shoulder portions of said locking tabs are engaged by an outer diameter portion of said first group of end turns prior to the assembly of said second winding, and said locking tabs being detachable by breaking along said spaced strips following assembly of said second winding in the spaced slots of said stator core.

Claim 9

An end turn insulator for a stator assembly of a dynamoelectric machine including a stator core having axially extending and circumferentially-spaced slots receiving a first field winding with preselected slots being left vacant to form circumferentially-spaced radial openings adjacent the ends of the vacant slots and between the stator core and a first group of end turns formed by said first field winding, and said spaced slots further receiving a second filed winding which forms a second group of end turns disposed radially inwardly of said first group of end turns, said end turn insulator comprising: an elongated insulator body made of a thin sheet of insulation material and including opposite end portions, said opposite end portions having a predetermined overlapping position to form said insulator body in a circular collar which provides an insulating barrier when mounted between said first and second groups of end turns; first and second triangularly-shaped locking tabs having a base side disposed adjacent a side edge of said insulator body wherein said first locking tab is disposed adjacent one of said end portions; two pairs of spaced strips connecting the base sides of each of said first and second locking tabs to said side edge so that sAid first and second locking tabs are aligned with a pair of said radial openings when said body is formed in a circular collar, and said pairs of spaced strips being disposed intermediate the ends of said base sides of said first and second locking tabs so as to define shoulder portions on opposite sides of the spaced strips; means for interlocking said opposite ends in said predetermined overlapping position including a closed slit opening having perforations extending from one end thereof formed in the other of said opposite end portions and a flap portion formed in said one end portion, said first locking tab extending from said flap portion so that both are insertable through said closed slit opening, said closed slit opening extending substantially parallel to said side edge of said body and said flap portion being formed by two laterally-spaced openings disposed along an axis line extending substantially parallel to said side edge and including pairs of opposing lip portions formed on each of said laterally-spaced openings whereby said flap portion is bendable along said axis line for facilitating insertion of said first locking tab and said flap portion through said closed slit opening to position said opposing lip portions of each of said laterally-spaced openings at the ends of said closed slit opening, said locking tabs being bendable along said pairs of spaced strips to extend radially outwardly for insertion through said circumferentially-spaced radial openings when said circular collar formed by said body covers the inner diameter of said first group of end turns and said pairs of spaced strips are disposed within said circumferentially-spaced radial openings so that said shoulder portions of said locking tabs are engaged by an outer diameter portion of said first group of end turns prior to the assembly of said second winding, and said locking tabs being detachable by breaking along said spaced strips following assembly of said second winding in the spaced slots of said stator core.

Claim 10

An end turn insulator for a stator assembly of a dynamoelectric machine including a stator core having axially extending and circumferentially-spaced slots receiving a first field winding with preselected slots being left vacant to form circumferentially-spaced radial openings adjacent the ends of the vacant slots and between the stator core and a first group of end turns formed by said first field winding, and said spaced slots further receiving a second filed winding which forms a second group of end turns disposed radially inwardly of said first group of end turns, said end turn insulator comprising: an elongated insulator body made of a thin sheet of insulation material and including opposite end portions, said opposite end portions having a predetermined overlapping position to form said insulator body in a circular collar which provides an insulating barrier when mounted between said first and second groups of end turns; first and second triangularly-shaped locking tabs having a base side disposed adjacent a side edge of said insulator body wherein said first locking tab is disposed adjacent one of said end portions; two pairs of spaced strips connecting the base sides of each of said first and second locking tabs to said side edge so that sAid first and second locking tabs are aligned with a pair of said radial openings when said body is formed in a circular collar, and said pairs of spaced strips being disposed intermediate the ends of said base sides of said first and second locking tabs so as to define shoulder portions on opposite sides of the spaced strips; means for interlocking said opposite ends in said predetermined overlapping position including a closed slit opening having perforations extending from one end thereof formed in the other of said opposite end portions and a flap portion formed in said one end portion, said first locking tab extending from said flap portion so that both are insertable through said closed slit opening, said closed slit opening extending substantially parallel to said side edge of said body and said flap portion being formed by two laterally-spaced openings disposed along an axis line extending substantially parallel to said side edge and including pairs of opposing lip portions formed on each of said laterally-spaced openings whereby said flap portion is bendable along said axis line for facilitating insertion of said first locking tab and said flap portion through said closed slit opening to position said opposing lip portions of each of said laterally-spaced openings at the ends of said closed slit opening, said locking tabs being bendable along said pairs of spaced strips to extend radially outwardly for insertion through said circumferentially-spaced radial openings when said circular collar formed by said body covers the inner diameter of said first group of end turns and said pairs of spaced strips are disposed within said circumferentially-spaced radial openings so that said shoulder portions of said locking tabs are engaged by an outer diameter portion of said first group of end turns prior to the assembly of said second winding, and said locking tabs being detachable by breaking along said spaced strips following assembly of said second winding in the spaced slots of said stator core.