US3753513A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Handling and sorting devices
Assignee: Badalex Ltd
•
Filing: 1972-05-05
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Granted: 1973-08-21
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Expires: 1992-05-05
Abstract
Abstract Apparatus and method for handling or sorting articles of magnetic material by magnetomotive means. The articles are fed to a guide across which a magnetic flux is maintained between a pair of pole pieces of a magnetomotive means; the magnetic flux increasing in density along the guide so as to separate and move the articles along the guide in the direction of increasing magnetic flux density.
Inventors
- 👤 J Grenfell
- 👤 Buchanan J Brown
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 11:02
CPC Classifications
B; B65; B65G; B65G47/00; B65G47/02; B65G47/04; B65G47/12; B65G47/14; B65G47/1407; B65G47/1414; B65G47/1421; B65G47/22; B65G47/26; B65G47/28; B65G54/00; B65G54/02; B65G2201/00; B65G2201/02
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
84 words
Apparatus for handling or sorting articles of magnetic material, comprising in combination a guide for said articles, a magnetomotive means for generating a magnetic flux across a pair of pole pieces located adjacent the sides of said guide, and feed means for presenting said articles to one end of said guide, said magnetic flux increasing in density along said guide from said one end whereby articles fed to said one end will move along said guide in the direction of increasing magnetic flux density.
Claim 2
Dependent Claim
84 words
Apparatus for handling or sorting articles of magnetic material, comprising in combination a guide for said articles, a magnetomotive means for generating a magnetic flux across a pair of pole pieces located adjacent the sides of said guide, and feed means for presenting said articles to one end of said guide, said magnetic flux increasing in density along said guide from said one end whereby articles fed to said one end will move along said guide in the direction of increasing magnetic flux density.
Claim 3
Dependent Claim
26 words
Apparatus according to claim 1 wherein said pole pieces are shaped to provide a highly concentrated magnetic field with a maximum concentration slightly above said guide.
Claim 4
Dependent Claim
30 words
Apparatus according to claim 2 wherein said pole pieces are tapered inwardly from said one end to the other end of the guide for generation of said increasing magnetic flux.
Claim 5
Dependent Claim
16 words
Apparatus according to claim 1 wherein said guide is of channel section and of non-magnetic material.
Claim 6
Dependent Claim
22 words
Apparatus according to claim 4 wherein said guide has a covering member to provide a substantially closed guide way for said articles.
Claim 7
Dependent Claim
44 words
Apparatus according to claim 4 wherein the guide width is greater than the maximum diameter of the articles to be fed so that the articles can take up positions which represent the minimum magnetic reluctance to the lines of force extending across the guide.
Claim 8
Dependent Claim
22 words
Apparatus according to claim 1 wherein said pole pieces are connected by a magnetic limb over which is wound an energising coil.
Claim 9
Dependent Claim
21 words
Apparatus according to claim 1 including a mechanism for removing articles from the guide on arrival at said other end thereof.
Claim 10
Dependent Claim
40 words
Apparatus according to claim 8 wherein said mechanism comprises a pneumatic cylinder having a rod reciprocable along the guide, and a finger adjacent the other end of the guide and movable by said rod to engage and remove said articles.
Claim 11
Dependent Claim
24 words
Apparatus according to claim 1 wherein each pole piece is provided with a respective coil energised by a combination of unidirectional and pulsating currents.
Claim 12
Dependent Claim
62 words
Apparatus according to claim 10 wherein said coils are wound in the same sense and are connected to a rectifier bridge having oppositely connected diodes for alternate energisation of said coils, the proportion of direct and alternating current fed to the coils being controllable by means of a variable resistor connected in series with said rectifier bridge across an alternating current supply.
Claim 13
Independent Claim
77 words
A method for handling or sorting articles of magnetic material comprising the steps of randomly feeding said articles to one end of a guide; and generating, by means of a magnetomotive system having a pair of pole pieces located adjacent the sides of said guide, a magnetic flux; said magnetic flux increasing in density along said guide from said one end thereof, whereby said articles move along said guide in the direction of increasing magnetic flux density.
Claim 14
Independent Claim
77 words
A method for handling or sorting articles of magnetic material comprising the steps of randomly feeding said articles to one end of a guide; and generating, by means of a magnetomotive system having a pair of pole pieces located adjacent the sides of said guide, a magnetic flux; said magnetic flux increasing in density along said guide from said one end thereof, whereby said articles move along said guide in the direction of increasing magnetic flux density.
Claim 15
Dependent Claim
27 words
A method according to claim 12 wherein said magnetic flux is generated to provide a highly concentrated magnetic field with a maximum concentration slightly above said guide.
Claim 16
Dependent Claim
22 words
A method according to claim 12 wherein said articles are removed in turn on arrival at the other ends of said guide.
Claim 17
Dependent Claim
22 words
A method according to claim 12 wherein coils of said pole pieces are energised by a combination of undirectional and pulsating currents.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-08-20 | 1977-02-19 | 1977-08-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-08-20 | 1981-02-19 | 1981-08-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-08-20 | 1985-02-19 | 1985-08-21 | $7700.00 | Window Closed / Lapsed |