Patent US3949249A successfully refreshed from Google Patents.
US3949249A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electro-magnetic reciprocating motor
Assignee: Individual
•
Filing: 1974-08-02
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Granted: 1976-04-06
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Expires: 1994-08-02
Abstract
Abstract A magnetic motor wherein a piston mounted magnet is reciprocated through a predetermined stroke in timed relation to polarity reversal of a pair of electro-magnetic assemblies at opposite axial ends of the piston cylinder. Polarity reversal and the intensity of the magnetic field is varied as a function of piston movement through a distributor to control the output of the motor. Hysteresis and flux leakage is reduced by an arrangement of permanent magnets and magnetic spheroids associated with one of the electro-magnetic assemblies.
Inventors
- 👤 Kenneth Wiseley
- 👤 Elton M. Botts
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 20:01
CPC Classifications
H; H02; H02K; H02K33/00; H02K33/12; H02K33/14; H02K7/00; H02K7/06; H02K7/065
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
147 words
In a magnetic motor having a tubular housing slidably mounting a magnetic piston and a pair of electro-magnetic devices mounted on the housing adjacent opposite axial ends for inducing reciprocation of the piston, at least one of said electro-magnetic devices including a core having a flux emitting face closing one axial end of the tubular housing and a winding mounted on the core, and flux concentrating means mounted on said core for confining the magnetic field to the tubular housing, said flux concentrating means including sector-shaped magnets mounted on said core in circumferentially spaced relation to each other and in radially embracing relation to the magnetic field producing winding, angularly adjacent ones of the sector-shaped magnets being of opposite polarity, and a plurality of axially spaced magnets of opposite polarity mounted on the core in axially spaced relation to the winding remote from the flux emitting face.
Claim 2
Dependent Claim
147 words
In a magnetic motor having a tubular housing slidably mounting a magnetic piston and a pair of electro-magnetic devices mounted on the housing adjacent opposite axial ends for inducing reciprocation of the piston, at least one of said electro-magnetic devices including a core having a flux emitting face closing one axial end of the tubular housing and a winding mounted on the core, and flux concentrating means mounted on said core for confining the magnetic field to the tubular housing, said flux concentrating means including sector-shaped magnets mounted on said core in circumferentially spaced relation to each other and in radially embracing relation to the magnetic field producing winding, angularly adjacent ones of the sector-shaped magnets being of opposite polarity, and a plurality of axially spaced magnets of opposite polarity mounted on the core in axially spaced relation to the winding remote from the flux emitting face.
Claim 3
Dependent Claim
81 words
In a non-magnetic magnetic motor having a tubular housing slidably mounting a magnetic piston and a pair of electro-magnetic devices mounted on the housing adjacent opposite axial ends thereof for inducing reciprocation of the piston, at least one of said electromagnetic devices including a core having a flux emitting face closing one axial end of the tubular housing and a winding mounted on the core, and hysteresis reducing means mounted in the core in axial alignment with said flux emitting face.
Claim 4
Dependent Claim
81 words
In a non-magnetic magnetic motor having a tubular housing slidably mounting a magnetic piston and a pair of electro-magnetic devices mounted on the housing adjacent opposite axial ends thereof for inducing reciprocation of the piston, at least one of said electromagnetic devices including a core having a flux emitting face closing one axial end of the tubular housing and a winding mounted on the core, and hysteresis reducing means mounted in the core in axial alignment with said flux emitting face.
Claim 5
Dependent Claim
60 words
The combination of claim 2 including variable resistance means connected to the electro-magnetic devices for cyclically varying the magnetic field in magnitude as a function of said reciprocating motion of the piston, and switching means interconnected between the source and the variable resistance means for periodically reversing the polarity of the magnetic field in timed relation to said reciprocating motion.
Claim 6
Dependent Claim
118 words
In a magnetic motor having a tubular housing slidably mounting a magnetic piston and a pair of electro-magnetic devices mounted on the housing adjacent opposite axial ends for inducing reciprocation of the piston, at least one of said electromagnetic devices including a core having a flux emitting face closing one axial end of the tubular housing and a winding mounted on the core, and hysteresis reducing means mounted on the core in axial alignment with said flux emitting face, said hysteresis reducing means including a cavity formed in the core in axial alignment with said flux emitting face, a plurality of magnetically polarized spheriods in said cavity and damping fluid filling said cavity with the spheriods immersed therein.
Claim 7
Dependent Claim
118 words
In a magnetic motor having a tubular housing slidably mounting a magnetic piston and a pair of electro-magnetic devices mounted on the housing adjacent opposite axial ends for inducing reciprocation of the piston, at least one of said electromagnetic devices including a core having a flux emitting face closing one axial end of the tubular housing and a winding mounted on the core, and hysteresis reducing means mounted on the core in axial alignment with said flux emitting face, said hysteresis reducing means including a cavity formed in the core in axial alignment with said flux emitting face, a plurality of magnetically polarized spheriods in said cavity and damping fluid filling said cavity with the spheriods immersed therein.
Claim 8
Dependent Claim
22 words
The combination of claim 4 including flux concentrating means mounted on the core for confining the magnetic field to the tubular housing.
Claim 9
Dependent Claim
73 words
The combination of claim 5 wherein said flux concentrating means includes sector-shaped magnets mounted on said core in circumferentially spaced relation to each other and in radially embracing relation to the magnetic field producing winding, angularly adjacent ones of the sector-shaped magnets being of opposite polarity, and a plurality of axially spaced magnets of opposite polarity mounted on the core in axially spaced relation to the winding remote from the flux emitting face.
Claim 10
Dependent Claim
60 words
The combination of claim 6 including variable resistance means connected to the electro-magnetic devices for cyclically varying the magnetic field in magnitude as a function of said reciprocating motion of the piston, and switching means interconnected between the source and the variable resistance means for periodically reversing the polarity of the magnetic field in timed relation to said reciprocating motion.
References Cited (Backward Citations)
GB550249A
Cited
US2486948A
Cited
US2568757A
Cited
US3205415A
Cited
US3202886A
Cited
US3549830A
Cited
US3504315A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1979-04-06 | 1979-10-06 | 1980-04-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-04-06 | 1983-10-06 | 1984-04-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-04-06 | 1987-10-06 | 1988-04-06 | $7700.00 | Window Closed / Lapsed |