US3809239A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Magnetic refuse separator
Assignee: Venturedyne Ltd
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Filing: 1972-12-26
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Granted: 1974-05-07
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Expires: 1992-12-26
Abstract
Abstract A magnetic separator is located at the discharge end of a refuse conveyor. The separator includes a continuous belt revolving in a closed path and having a curve in its path other than at its head or end pulley. A magnetic assembly generates a magnetic field at the belt curve and on both the upstream and downstream as sides thereof. The refuse conveyor runs at an angle toward and discharges its burden into the belt in the upstream portion of the magnetic field. Magnetic material in the burden is attracted to the belt and non-magnetic material falls away. The magnetic material travels with the belt around the curve causing some agitation to dislodge any non-magnetic material being carried along with the magnetic material. Downstream of the curve, the belt, and the magnetic material, move out of the magnetic field whereupon the magnetic material falls away from the belt. The magnetic separator is supported above a receptacle into which the thus separated magnetic and non-magnetic materials fall into segregated areas. The separator''s position is adjustable horizontally to accommodate different levels of burden on the refuse conveyor.
Inventors
- 👤 W Barrett
- 👤 N Potter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 08:10
CPC Classifications
B; B03; B03C; B03C1/00; B03C1/02; B03C1/16; B03C1/22; Y; Y10; Y10S; Y10S209/00; Y10S209/93
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
153 words
A magnetic separator comprising, in combination, a belt, means supporting said belt for movement around a closed path in continuous fashion with said path having an upper and a lower portion, a magnetic assembly having an extension along said lower portion of said closed path, means supporting said magnetic assembly to generate a magnetic field along said lower portion of said closed path and through which said belt moves, said means supporting said belt also defining, in said lower portion of said path, a curve and, upstream of said curve, a generally straight line path along which said belt moves up to said curve, and said magnetic assembly disposed with a portion thereof located, relative to the path of travel of said belt, on both sides of said curve so that magnetic material in said field is attracted to and travels with said belt along said straight line path and around said curve.
Claim 2
Dependent Claim
153 words
A magnetic separator comprising, in combination, a belt, means supporting said belt for movement around a closed path in continuous fashion with said path having an upper and a lower portion, a magnetic assembly having an extension along said lower portion of said closed path, means supporting said magnetic assembly to generate a magnetic field along said lower portion of said closed path and through which said belt moves, said means supporting said belt also defining, in said lower portion of said path, a curve and, upstream of said curve, a generally straight line path along which said belt moves up to said curve, and said magnetic assembly disposed with a portion thereof located, relative to the path of travel of said belt, on both sides of said curve so that magnetic material in said field is attracted to and travels with said belt along said straight line path and around said curve.
Claim 3
Dependent Claim
41 words
The magnetic separator of claim 1 wherein said magnetic assembly also includes a portion located at said curve to generate a magnetic field at said curve and maintain an attractive force on magnetic material traveling with said belt around said curve.
Claim 4
Dependent Claim
19 words
The magnetic separator of claim 2 including a plurality of idler rollers at said curve for engaging said belt.
Claim 5
Dependent Claim
29 words
The magnetic separator of claim 1 wherein said magnetic assembly varies in magnetic intensity the downstream portions thereof generating a lesser strength magnetic field than the upstream portions thereof.
Claim 6
Dependent Claim
85 words
The magnetic separator of claim 1 wherein said magnetic assembly includes a head pulley and an end pulley located, relative to the path of travel of said belt, upstream and downstream, respectively of said curve, including drive means for moving said belt through said closed path, said drive means connected to and rotating said drive pulley to drive said belt, and wherein said belt is supported in a relatively slack condition between said head and end pulleys and around said curve to minimize belt wear.
Claim 7
Dependent Claim
38 words
The magnetic separator of claim 1 wherein the portions of said belt upstream and downstream of said curve are both supported for movement along generally straight line paths and both paths are at an angle to the horizontal.
Claim 8
Dependent Claim
23 words
The magnetic separator of claim 1 wherein the portion of said belt upstream of said curve is at an angle to the horizontal.
Claim 9
Dependent Claim
99 words
The magnetic separator of claim 1 in combination with a supply conveyor for delivering a burden consisting of magnetic and non-magnetic material to said belt upstream of said curve and into the magnetic field generated by said magnetic assembly, means for supporting said magnetic separator over a receptacle into which non-magnetic material falls, and a splitter baffle located in the area of the downstream end of said magnetic assembly so that magnetic material adhered to said belt is held on said belt up to said splitter baffle after which it leaves said magnetic field and falls from said belt.
Claim 10
Dependent Claim
68 words
The magnetic separator of claim 1 in combination with a supply conveyor for delivering a burden consisting of magnetic and non-magnetic material to said belt upstream of said curve and into the magnetic field generated by said magnetic assembly, said supply conveyor disposed at an angle to the portion of said belt upstream of said curve, and means for moving said magnetic separator relative to said supply conveyor.
Claim 11
Dependent Claim
41 words
The magnetic separator of claim 8 wherein said magnetic assembly also includes a portion located at said curve to generate a magnetic field at said curve and maintain an attractive force on magnetic material traveling with said belt around said curve.
Claim 12
Dependent Claim
23 words
The magnetic separator of claim 8 wherein the portion of said belt upstream of said curve is at an angle to the horizontal.
Claim 13
Dependent Claim
39 words
The magnetic separator of claim 1 in combination with a supply conveyor for delivering a burden consisting of magnetic and non-magnetic material to said belt upstream of said curve and into the magnetic field generated by said magnetic assembly.
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) | 1977-05-06 | 1977-11-05 | 1978-05-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-05-06 | 1981-11-05 | 1982-05-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-05-06 | 1985-11-05 | 1986-05-07 | $7700.00 | Window Closed / Lapsed |