US3609427A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Field coil structure for electric motor
Assignee: RMR CORPORATON A CORP OF
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Filing: 1970-05-13
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Granted: 1971-09-28
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Expires: 1990-05-13
Abstract
Abstract An electric motor has a stator ring and a separate stator yoke spaced therefrom and having pole tip projections adapted to be pressed in place inside the ring. A stator coil supporting structure of bendable plastic has a pair of bobbins with central apertures therethrough in which the pole tip projections are adapted to fit and radially projecting flanges adapted to extend along the inner and outer sides of a coil wound on each bobbin. An integral connecting strip is joined to one side of each inner bobbin flange for supporting the crossover wire between the coils, the structure being adapted to be bent on either side of the connecting strip into a generally U-shape. The strip has tubular securing portions for the inner ends of a pair of lead wires and has a projecting tab adapted to be bent and folded down over the crossover wire, a portion of the tab being adapted to snap into a recess formed between the tubes by projections on the tubes.
Inventors
- 👤 Max E Lautner
- 👤 George Hale Smith
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 04:42
CPC Classifications
H; H02; H02K; H02K3/00; H02K3/46; H02K3/52; H02K3/521; H02K3/522; H02K1/00; H02K1/06; H02K1/12; H02K1/14; H02K1/146; H02K1/148; H02K2203/00; H02K2203/12
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
177 words
A stator assembly for an electric motor having a stator ring and a separate stator yoke spaced therefrom, the yoke having a plurality of radially spaced pole tip projections engaged with the stator ring, a unitary coil supporting structure having a coil supporting bobbin for each pole tip projection, each bobbin having an aperture axially therethrough in which the pole tip projection lies, each bobbin having a drum around the aperture on which its coil is wound and a radially projecting inner and outer flange protecting the sides of its supported coil, the inner flanges of adjacent bobbins being connected by a connecting strip adapted to support the connecting wire between coils, the supporting structure being of bendable plastic and adapted to be bent at the junction lines between junction strip and bobbin, at least one connecting strip having integral tubular projections and lead wires connected to the coil end wires secured in the said projections, whereby the coil supporting structure can be folded around the stator yoke prior to assembling the yoke in the stator ring.
Claim 2
Dependent Claim
177 words
A stator assembly for an electric motor having a stator ring and a separate stator yoke spaced therefrom, the yoke having a plurality of radially spaced pole tip projections engaged with the stator ring, a unitary coil supporting structure having a coil supporting bobbin for each pole tip projection, each bobbin having an aperture axially therethrough in which the pole tip projection lies, each bobbin having a drum around the aperture on which its coil is wound and a radially projecting inner and outer flange protecting the sides of its supported coil, the inner flanges of adjacent bobbins being connected by a connecting strip adapted to support the connecting wire between coils, the supporting structure being of bendable plastic and adapted to be bent at the junction lines between junction strip and bobbin, at least one connecting strip having integral tubular projections and lead wires connected to the coil end wires secured in the said projections, whereby the coil supporting structure can be folded around the stator yoke prior to assembling the yoke in the stator ring.
Claim 3
Dependent Claim
180 words
Stator coil supporting structure for an electric motor having a stator ring with a separate stator yoke spaced inward therefrom, the yoke having diametrically opposite pole tip projections adapted to engage the ring, the supporting structure comprising a pair of bobbins, each having an aperture axially therethrough in which a pole tip projection is adapted to extend, a coil wound on each bobbin, and inner and outer radially projecting flanges on the bobbin adapted to protect the sides of the coils, a connecting strip integral with the bobbins being joined to one side edge of the inner flange of each bobbin, the structure being of bendable plastic material and adapted to bend along the joint on each side of the strip into a generally U-shape with the pole tip projections extending through the bobbins, the connecting strip being adapted to support the crossover wire between coils, and tubes integral with the strip and adapted to secure therein the inner ends of lead wires joined to the coil ends providing suitable strain relief and insulation of lead to coil wire connections.
Claim 4
Dependent Claim
180 words
Stator coil supporting structure for an electric motor having a stator ring with a separate stator yoke spaced inward therefrom, the yoke having diametrically opposite pole tip projections adapted to engage the ring, the supporting structure comprising a pair of bobbins, each having an aperture axially therethrough in which a pole tip projection is adapted to extend, a coil wound on each bobbin, and inner and outer radially projecting flanges on the bobbin adapted to protect the sides of the coils, a connecting strip integral with the bobbins being joined to one side edge of the inner flange of each bobbin, the structure being of bendable plastic material and adapted to bend along the joint on each side of the strip into a generally U-shape with the pole tip projections extending through the bobbins, the connecting strip being adapted to support the crossover wire between coils, and tubes integral with the strip and adapted to secure therein the inner ends of lead wires joined to the coil ends providing suitable strain relief and insulation of lead to coil wire connections.
Claim 5
Dependent Claim
76 words
Coil-supporting structure defined in claim 2 and having an integral tab projecting from one end of the connecting strip, each strip tube having a projection therealong forming a shoulder spaced from and facing the strip between the tubes, the tab being adapted to be bent and folded down over the tubes, the tab having a foot with tapered sides adapted to be forced down between the tubes and to be engaged by the downwardly facing shoulders.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-09-27 | 1975-03-29 | 1975-09-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-09-27 | 1979-03-29 | 1979-09-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-09-27 | 1983-03-29 | 1983-09-28 | $7700.00 | Window Closed / Lapsed |