Patent US3725707A successfully refreshed from Google Patents.
US3725707A
Expired / Lapsed
US
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Field sub-assembly for universal electric motors
Assignee: Black and Decker Corp
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Filing: 1971-05-05
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Granted: 1973-04-03
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Expires: 1991-05-05
Abstract
Abstract For a universal electric motor, a wound field sub-assembly including a core and a pair of coils wound in slots therein, wherein the solid, magnet wire of the coils is connected to the stranded, lead wire via a simplified and improved connector and process. A connector, insulatively mounted on the field core, receives the magnet wire and provides for later connection to stranded lead wire or another circuit element. The process includes, in addition to the conventional winding of the coils on the core, the step of mechanically securing the start and end portions of the wound coil to the terminal before control thereof is released by the winding apparatus.
Inventors
- 👤 S Abbratozzato
- 👤 W Leimbach
- 👤 J Marshall
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 18:11
CPC Classifications
H; H02; H02K; H02K3/00; H02K3/46; H02K3/52; H02K3/521; H02K3/522; H01; H01F; H01F41/00; H01F41/02; H01F41/04; H01F41/10; H01R; H01R9/00; H01R9/22; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49002; Y10T29/49009; Y10T29/4902; Y10T29/49071
Claims Analysis
Total Claims: 32
Claim 1
Independent Claim
127 words
A wound field sub-assembly for a universal electric motor comprising a field core including a stack of annular laminations secured together; said core having two pole pieces, each of said pole pieces defining a pair of winding slots in said core; a coil of wire wound in each of said pairs of slots; a pair of insulating terminal blocks mounted on said core, each of said blocks including a terminal support portion; a pair of terminal means for connecting said coils in a motor circuit supported by each of said blocks, each of said terminal means including a first portion connected to an end of one of said coils, and a second portion integral with said first portion and adapted to receive a connection to said circuit.
Claim 2
Dependent Claim
127 words
A wound field sub-assembly for a universal electric motor comprising a field core including a stack of annular laminations secured together; said core having two pole pieces, each of said pole pieces defining a pair of winding slots in said core; a coil of wire wound in each of said pairs of slots; a pair of insulating terminal blocks mounted on said core, each of said blocks including a terminal support portion; a pair of terminal means for connecting said coils in a motor circuit supported by each of said blocks, each of said terminal means including a first portion connected to an end of one of said coils, and a second portion integral with said first portion and adapted to receive a connection to said circuit.
Claim 3
Dependent Claim
17 words
A sub-assembly as claimed in claim 1 wherein said connection to said circuit comprises a lead wire.
Claim 4
Dependent Claim
24 words
A sub-assembly as claimed in claim 1 wherein said first integral portion of said terminal comprises a U-shaped channel for receiving said wire end.
Claim 5
Dependent Claim
28 words
A sub-assembly as claimed in claim 1 wherein said second integral portion comprises a socket and a tang protruding inwardly into said sleeve for retaining said element therein.
Claim 6
Dependent Claim
42 words
A sub-assembly as claimed in claim 4 wherein said terminals have a yield strength sufficient so that said tang provides a retaining force on said element and a ductility sufficient to permit said first portion to be crimped to said wire end.
Claim 7
Dependent Claim
154 words
A wound field subassembly for a series-connected universal motor, comprising a field core including a stack of laminations secured together, said field core having two pairs of winding slots formed therein, each pair of winding slots having a pole piece formed therebetween, each pole piece having a pair of circumferentially-spaced tips, one each adjacent to a respective winding slot; a pair of insulating blocks mounted on said stack, one each between opposed tips of the respective pole pieces; each block having first and second spaced conductive means included thereon, respectively adjacent to said winding slots; a pair of coils, one each wound between a respective pair of winding slots, each coil having a pair of terminals, one each of said terminals secured to a respective conductive means, and a lead connecting the respective coils in series with each other, said lead being connected between a pair of opposed conductive means on said respectIve inserts.
Claim 8
Dependent Claim
154 words
A wound field subassembly for a series-connected universal motor, comprising a field core including a stack of laminations secured together, said field core having two pairs of winding slots formed therein, each pair of winding slots having a pole piece formed therebetween, each pole piece having a pair of circumferentially-spaced tips, one each adjacent to a respective winding slot; a pair of insulating blocks mounted on said stack, one each between opposed tips of the respective pole pieces; each block having first and second spaced conductive means included thereon, respectively adjacent to said winding slots; a pair of coils, one each wound between a respective pair of winding slots, each coil having a pair of terminals, one each of said terminals secured to a respective conductive means, and a lead connecting the respective coils in series with each other, said lead being connected between a pair of opposed conductive means on said respectIve inserts.
Claim 9
Dependent Claim
21 words
A sub-assembly as claimed in claim 4 wherein said socket includes a tang portion for retaining said element in said socket.
Claim 10
Dependent Claim
21 words
A sub-assembly as claimed in claim 7 wherein said wire end interconnection means comprises a channel portion secured to said wire.
Claim 11
Dependent Claim
42 words
A sub-assembly as claimed in claim 8 wherein said terminals have a yield strength sufficient so that said tang provides a retaining force on said element and a ductility sufficient to permit said channel portion to be crimped to said wire end.
Claim 12
Dependent Claim
12 words
A sub-assembly as claimed in claim 9 wherein said terminals are phosphor-bronze.
Claim 13
Dependent Claim
24 words
A sub-assembly as claimed in claim 1 wherein said blocks are each disposed within said core and between the ends of said pole pieces.
Claim 14
Dependent Claim
38 words
A sub-assembly as claimed in claim 11 wherein said circuit interconnection means comprises a socket disposed in an aperture in said terminal block, and wherein said wire end interconnection means comprises a channel portion integral with said sleeve.
Claim 15
Dependent Claim
142 words
A wound field sub-assembly for an electric motor comprising a field core including a stack of laminations secured together; said core including an annular portion enclosing at least two pole pieces, each of said pole pieces defining a pair of winding slots in said core; a coil of wire wound in each of said pairs of slots; a plurality of insulating terminal blocks mounted on said core, each of said terminal blocks including a terminal support portion and a pair of leg portions, said leg portions engaging said annular portion between said pole pieces, and said terminal support portion being located on one end of said core; at least one conductive terminal supported by each of said blocks, each of said terminals comprising means for interconnection to a wire end of one of said coils and means for interconnection in a circuit.
Claim 16
Dependent Claim
142 words
A wound field sub-assembly for an electric motor comprising a field core including a stack of laminations secured together; said core including an annular portion enclosing at least two pole pieces, each of said pole pieces defining a pair of winding slots in said core; a coil of wire wound in each of said pairs of slots; a plurality of insulating terminal blocks mounted on said core, each of said terminal blocks including a terminal support portion and a pair of leg portions, said leg portions engaging said annular portion between said pole pieces, and said terminal support portion being located on one end of said core; at least one conductive terminal supported by each of said blocks, each of said terminals comprising means for interconnection to a wire end of one of said coils and means for interconnection in a circuit.
Claim 17
Dependent Claim
32 words
A sub-assembly as claimed in claim 13 wherein said circuit interconnection means comprises a socket, said socket including a tang retaining means, and said wire end interconnection means comprises a channel portion.
Claim 18
Dependent Claim
42 words
A sub-assembly as claimed in claim 14 wherein said terminals have a yield strength sufficient so that said tang provides a retaining force on said element and a ductility sufficient to permit said channel portion to be crimped to said wire end.
Claim 19
Dependent Claim
87 words
An interconnection assembly for electrically joining a coil of wire to a circuit comprising a supporting body; a coil on said body; a pair of insulating blocks mounted adjacent said coil, and a pair of integral, one piece connectors, one of said connectors being supported by each of said blocks, said connectors each comprising a channel portion for receiving an end of said coil, and a socket portion for receiving a connection to said circuit, whereby said coil is connected to said circuit without additional connector parts.
Claim 20
Dependent Claim
87 words
An interconnection assembly for electrically joining a coil of wire to a circuit comprising a supporting body; a coil on said body; a pair of insulating blocks mounted adjacent said coil, and a pair of integral, one piece connectors, one of said connectors being supported by each of said blocks, said connectors each comprising a channel portion for receiving an end of said coil, and a socket portion for receiving a connection to said circuit, whereby said coil is connected to said circuit without additional connector parts.
Claim 21
Dependent Claim
25 words
An assembly as claimed in claim 16 wherein each of said sockets includes an inwardly projecting tang portion for retaining said element in said socket.
Claim 22
Dependent Claim
44 words
An assembly as claimed in claim 17 wherein each of said connectors has a yield strength sufficient so that said tang provides a retaining force on said element and a ductility sufficient to permit said channel portion to be crimped to said wire end.
Claim 23
Dependent Claim
14 words
An assembly as claimed in claim 18 wherein each of said connectors are phosphorbronze.
Claim 24
Dependent Claim
27 words
An assembly as claimed in claim 17 wherein each of said sockets comprises a cylindrical sleeve and wherein said tang comprises a severed portion of said sleeve.
Claim 25
Dependent Claim
93 words
A one-piece electrical connector for directly conductively joining a pair of wires comprising a socket portion adapted to retain one of said wires, said socket portion comprising a substantially cylindrical sleeve and a tang lanced from said cylindrical sleeve and extending inwardly of said sleeve for frictionally engaging said one wire to prevent removal thereof from said sleeve; and a laterally off-set channel portion integral with and extending from said socket portion anD adapted to be crimped to the other of said wires whereby said connector is the only part intermediate said wires.
Claim 26
Dependent Claim
93 words
A one-piece electrical connector for directly conductively joining a pair of wires comprising a socket portion adapted to retain one of said wires, said socket portion comprising a substantially cylindrical sleeve and a tang lanced from said cylindrical sleeve and extending inwardly of said sleeve for frictionally engaging said one wire to prevent removal thereof from said sleeve; and a laterally off-set channel portion integral with and extending from said socket portion anD adapted to be crimped to the other of said wires whereby said connector is the only part intermediate said wires.
Claim 27
Dependent Claim
132 words
A wound field sub-assembly for an electric motor comprising a field core including a stack of laminations secured together; said core including an annular portion enclosing at least two pole pieces, each of said pole pieces defining a pair of winding slots in said core; a coil of wire wound in each of said pairs of slots; a plurality of insulating terminal blocks mounted on said core, each of said terminal blocks including a terminal support portion mounted on the outside of said annular portion and an L-shaped leg portion engaging the inside of said annular portion; at least one conductive terminal supported by each of said blocks, each of said terminals comprising means for interconnection to a wire end of one of said coils and means for interconnection in a circuit.
Claim 28
Dependent Claim
132 words
A wound field sub-assembly for an electric motor comprising a field core including a stack of laminations secured together; said core including an annular portion enclosing at least two pole pieces, each of said pole pieces defining a pair of winding slots in said core; a coil of wire wound in each of said pairs of slots; a plurality of insulating terminal blocks mounted on said core, each of said terminal blocks including a terminal support portion mounted on the outside of said annular portion and an L-shaped leg portion engaging the inside of said annular portion; at least one conductive terminal supported by each of said blocks, each of said terminals comprising means for interconnection to a wire end of one of said coils and means for interconnection in a circuit.
Claim 29
Dependent Claim
110 words
A one-piece electrical connector for directly conductively joining a pair of wires comprising a socket portion adapted to retain one of said wires, said socket portion having a tang extending inwardly thereof for engaging said one wire, and a laterally off-set channel portion integral with and extending from said socket portion and adapted to be secured to the other of said wires whereby said connector is the only part intermediate said wires; said connector having a yield strength sufficient so that said tang provides a retaining force on a side of said one wire and a ductility sufficient to permit said channel portion to be crimped to said other wire.
Claim 30
Dependent Claim
110 words
A one-piece electrical connector for directly conductively joining a pair of wires comprising a socket portion adapted to retain one of said wires, said socket portion having a tang extending inwardly thereof for engaging said one wire, and a laterally off-set channel portion integral with and extending from said socket portion and adapted to be secured to the other of said wires whereby said connector is the only part intermediate said wires; said connector having a yield strength sufficient so that said tang provides a retaining force on a side of said one wire and a ductility sufficient to permit said channel portion to be crimped to said other wire.
Claim 31
Dependent Claim
170 words
A wound field sub-assembly for a universal electric motor comprising a field core including a stack of annular laminations secured together; said core having two pole pieces, each of said pole pieces defining a pair of winding slots in said core; a coil of wire wound in each of said pairs of slots; a pair of insulating terminal blocks mounted on said core, each of said blocks including a pair of cylindrical apertures; a pair of terminal means for connecting said coils in a motor circuit supported by each of said blocks, each of said terminal means including a generally cylindrical socket disposed in one of said apertures and adapted for connection in said circuit by insertion of a circuit element therein, each of said terminal means also including a laterally off-set channel portion integral with and extending from said socket and adapted to be crimped onto one of said coils of wire, said sub-assembly providing a stable, one-piece interconnection of each of said wire ends in said motor circuit.
Claim 32
Dependent Claim
170 words
A wound field sub-assembly for a universal electric motor comprising a field core including a stack of annular laminations secured together; said core having two pole pieces, each of said pole pieces defining a pair of winding slots in said core; a coil of wire wound in each of said pairs of slots; a pair of insulating terminal blocks mounted on said core, each of said blocks including a pair of cylindrical apertures; a pair of terminal means for connecting said coils in a motor circuit supported by each of said blocks, each of said terminal means including a generally cylindrical socket disposed in one of said apertures and adapted for connection in said circuit by insertion of a circuit element therein, each of said terminal means also including a laterally off-set channel portion integral with and extending from said socket and adapted to be crimped onto one of said coils of wire, said sub-assembly providing a stable, one-piece interconnection of each of said wire ends in said motor circuit.
References Cited (Backward Citations)
US3189857A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-04-02 | 1976-10-02 | 1977-04-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-04-02 | 1980-10-02 | 1981-04-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-04-02 | 1984-10-02 | 1985-04-03 | $7700.00 | Window Closed / Lapsed |