Patent US3821575A successfully refreshed from Google Patents.
US3821575A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Commutatorless and brushless direct current motor or generator
Assignee: Individual
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Filing: 1973-01-17
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Granted: 1974-06-28
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Expires: 1993-01-17
Abstract
Abstract An electrical generator utilizes a rotating magnetic field and a stationary wound stator to produce direct current output without the aid of a commutator or brushes. The continuous winding utilizes circumferential and radial slots in which the elements of the winding are alternately and successively placed so that only the radial slots generate a flow of current. The stator is arranged in segments, the connections between segments being magnetically shielded so as not to produce a flow of current and connected so that the flow would be additive and unidirectional. By supplying a direct current input the machine may be operated as a motor.
Inventors
- 👤 R Colosimo
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 06:02
CPC Classifications
H; H02; H02K; H02K99/00
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
203 words
An electrical machine comprising: a rotor comprising north and south magnetic poles in spaced relation to each other and defining a magnetic field therebetween; a stator positioned between said poles in spaced relation therewith and within said magnetic field; said stator being characterized by a plurality of separate segments, said segments being separated from each other by magnetic shields; a continuous electrical winding positioned upon said stator and forming a part thereof; said winding being further positioned within a plurality of slots forming a part of each of said segments; said slots comprising a first set of slots positioned circumferentially around said stator and a second set of slots positioned radially around said stator; said continuous winding being so further positioned within said slots that successive portions thereof are alternately positioned in said circumferential slots and in said radial slots within each of said segments of said stator; means for connecting successive portions of said winding in said segments of said stator with each other; said connecting means being positioned within said magnetic shields; whereby a unidirectional flow of electric current is generated in said winding when said rotor is rotated relative to said stator; means for conducting said current from said winding.
Claim 2
Dependent Claim
203 words
An electrical machine comprising: a rotor comprising north and south magnetic poles in spaced relation to each other and defining a magnetic field therebetween; a stator positioned between said poles in spaced relation therewith and within said magnetic field; said stator being characterized by a plurality of separate segments, said segments being separated from each other by magnetic shields; a continuous electrical winding positioned upon said stator and forming a part thereof; said winding being further positioned within a plurality of slots forming a part of each of said segments; said slots comprising a first set of slots positioned circumferentially around said stator and a second set of slots positioned radially around said stator; said continuous winding being so further positioned within said slots that successive portions thereof are alternately positioned in said circumferential slots and in said radial slots within each of said segments of said stator; means for connecting successive portions of said winding in said segments of said stator with each other; said connecting means being positioned within said magnetic shields; whereby a unidirectional flow of electric current is generated in said winding when said rotor is rotated relative to said stator; means for conducting said current from said winding.
Claim 3
Dependent Claim
25 words
The machine of claim 1 in which said magnetic poles comprise electromagnets having coil windings positioned thereon; means for supplying direct current to said windings.
Claim 4
Dependent Claim
69 words
The machine of claim 1 in which: said rotor has the general configuration comprising two hollow concentric cylinders positioned one inside the other; one end of said cylinders being closed to form a cup; the other end of said cylinders being open to form a gap therebetween; said stator is of generally toroidal configuration; said stator being positioned radially concentric with said cylinders and within said gap formed thereby.
Claim 5
Dependent Claim
27 words
The machine of claim 1 including means for supplying direct current to said stator winding whereby said rotor is made to rotate and thereby generate mechanical power.
Claim 6
Dependent Claim
191 words
An electrical machine comprising: a rotor comprising north and south magnetic poles in spaced relation to each other and defining a magnetic field therebetween; a stator positioned between said poles in spaced relation therewith and within said magnetic field; a core of generally toroidal configuration and comprising a plurality of independent segments, each of said segments being separated from the adjacent segments by a magnetic shield interposed therebetween; each of said segments being further characterized by a circumferential slot running concentrically with respect to said toroidal core and a plurality of cross slots running radially with respect to said core and around the body thereof; a continuous electrical winding positioned upon said segments and within said slot; said winding being further so positioned on said segments that successive elements thereof lie alternately in said circumferential slot and in said cross slots; means for connecting successive portions of said winding in said segments with each other; said connecting means being positioned within said magnetic shields, whereby a unidirectional flow of electric current is generated in said winding under the action of said rotating field; means for conducting said current from said winding.
Claim 7
Dependent Claim
191 words
An electrical machine comprising: a rotor comprising north and south magnetic poles in spaced relation to each other and defining a magnetic field therebetween; a stator positioned between said poles in spaced relation therewith and within said magnetic field; a core of generally toroidal configuration and comprising a plurality of independent segments, each of said segments being separated from the adjacent segments by a magnetic shield interposed therebetween; each of said segments being further characterized by a circumferential slot running concentrically with respect to said toroidal core and a plurality of cross slots running radially with respect to said core and around the body thereof; a continuous electrical winding positioned upon said segments and within said slot; said winding being further so positioned on said segments that successive elements thereof lie alternately in said circumferential slot and in said cross slots; means for connecting successive portions of said winding in said segments with each other; said connecting means being positioned within said magnetic shields, whereby a unidirectional flow of electric current is generated in said winding under the action of said rotating field; means for conducting said current from said winding.
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) | 1977-06-27 | 1977-12-27 | 1978-06-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-06-27 | 1981-12-27 | 1982-06-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-06-27 | 1985-12-27 | 1986-06-28 | $7700.00 | Window Closed / Lapsed |