US3595391A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Magnetic separator
Assignee: Individual
•
Filing: 1969-02-24
•
Granted: 1971-07-27
•
Expires: 1989-02-24
Abstract
Abstract A rotating drum, slightly inclined from the horizontal, is provided adjacent opposite ends with discharge openings, and the interior of the drum is provided with spiral ribs which tend to feed material toward the higher end of the drum to be discharged through the opening adjacent such end of the drum. Magnetic means is arranged externally of the drum and longitudinally thereof to cause pieces of magnetic material in the mixture to adhere to the side of the drum to be carried upwardly and then released to drop to the bottom of the drum, such material dropping vertically rather than perpendicularly to the axis of the drum so that it gradually works its way toward the lower end of the drum to be discharged through the lower discharge opening.
Inventors
- 👤 Byron C Schmid
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 09:08
CPC Classifications
B; B03; B03C; B03C1/00; B03C1/02; B03C1/10; B03C1/14
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
186 words
A separator for materials containing a magnetic substance, comprising an elongated cylinder, means for supporting said cylinder for rotation on an axis inclined from the horizontal, means acting as a conveyor for moving toward the higher end of said cylinder nonmagnetic portions of the mixture to be separated, and a magnet elongated longitudinally of the upwardly travelling side of said cylinder and arranged in proximity thereto, said magnet having at least one pole piece tending to cause magnetic particles in the cylinder to adhere to the upwardly moving side thereof as said cylinder is rotated, the flow of magnetic flux of said magnet tapering off toward the top of said cylinder whereby magnetic particles adhering to the side of the cylinder will drop from the top thereof into engagement with the bottom of said cylinder at a point spaced from the point at which they were picked up by the cylinder due to the inclination thereof to the horizontal, whereby the repeated picking up and dropping of magnetic particles causes them to work their way to the lower end of the cylinder to be discharged therefrom.
Claim 2
Dependent Claim
186 words
A separator for materials containing a magnetic substance, comprising an elongated cylinder, means for supporting said cylinder for rotation on an axis inclined from the horizontal, means acting as a conveyor for moving toward the higher end of said cylinder nonmagnetic portions of the mixture to be separated, and a magnet elongated longitudinally of the upwardly travelling side of said cylinder and arranged in proximity thereto, said magnet having at least one pole piece tending to cause magnetic particles in the cylinder to adhere to the upwardly moving side thereof as said cylinder is rotated, the flow of magnetic flux of said magnet tapering off toward the top of said cylinder whereby magnetic particles adhering to the side of the cylinder will drop from the top thereof into engagement with the bottom of said cylinder at a point spaced from the point at which they were picked up by the cylinder due to the inclination thereof to the horizontal, whereby the repeated picking up and dropping of magnetic particles causes them to work their way to the lower end of the cylinder to be discharged therefrom.
Claim 3
Dependent Claim
57 words
A separator according to claim 1 wherein said magnet has two pole pieces extending longitudinally of said cylinder at vertically spaced points, the upper pole piece being spaced from the top of said cylinder to gradually lose its magnetic attraction to magnetic particles in said cylinder by the time such particles reach the top of said cylinder.
Claim 4
Dependent Claim
22 words
A separator according to claim 2 provided with a central longitudinally elongated pole piece, and a magnet coil surrounding such pole piece.
Claim 5
Dependent Claim
40 words
A separator according to claim 1 wherein said cylinder is provided at least at spaced points therearound with magnetizable mateRial to assist the flow of magnetic flux through said cylinder to the pieces of magnetizable material adhering to said cylinder.
Claim 6
Dependent Claim
61 words
A separator according to claim 1 wherein said means acting as a conveyor comprises helical ribs within said cylinder, said cylinder having discharge openings therethrough adjacent the higher and lower ends of said cylinder for the discharge therethrough of nonmagnetic and magnetic materials respectively, said magnet having two pole pieces spaced vertically from each other and extending longitudinally of said cylinder.
Claim 7
Dependent Claim
35 words
A separator according to claim 5 provided with means for supporting said magnet adjacent said cylinder for tilting movement on a horizontal axis and for movement toward and away from said cylinder and vertically thereof.
Claim 8
Dependent Claim
33 words
A separator according to claim 5 wherein said cylinder is formed of inner and outer shells of nonmagnetic material and an intervening layer made up of alternate bodies of magnetic and nonmagnetic materials.
Claim 9
Dependent Claim
34 words
A separator according to claim 5 wherein said cylinder is formed of inner and outer shells of nonmagnetic material and an intervening shell formed of relatively thin magnetic material extending entirely around said cylinder.
Claim 10
Dependent Claim
37 words
A separator according to claim 5 wherein the interior of said cylinder is provided with longitudinal abutments extending between the turns of said helical ribs and of a height less than the radial width of said ribs.
Claim 11
Dependent Claim
107 words
A separator according to claim 1 wherein said magnet is provided with vertically spaced elongated pole pieces extending radially toward said cylinder, said magnet being further provided between said pole pieces with an intermediate pole piece having a coil therearound, said magnet having an upper pole piece extending radially toward said cylinder and having its upper end curved upwardly and away from said cylinder, at least said last-named pole piece having inserted therein at least one body of a non magnetic material to dampen the flow of magnetic flux toward the top of said cylinder and to attenuate the flow of said flux circumferentially around said cylinder.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-07-26 | 1975-01-25 | 1975-07-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-07-26 | 1979-01-25 | 1979-07-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-07-26 | 1983-01-25 | 1983-07-27 | $7700.00 | Window Closed / Lapsed |