GB732876A - Improvements relating to magnetised rollers, wheels, pulleys and the like for use inconveying and supporting ferro-magnetic bodies and as friction gearing - Google Patents

Abstract

732,876. Friction gearing. SPODIG, H. June 29, 1953, No. 17995/53. Class 80 (1). [Also in Groups XXX and XXXV] In magnetized rollers, wheels, pulleys and the like for use in conveying and supporting ferromagnetic bodies and as friction gearing, the peripheral surface is formed by the peripheries of rings of ferromagnetic material magnetized by permanent magnets mounted with their axes disposed radially or parallel to the axis of the roller &c. and by the peripheries of one or more rings or discs of non-ferromagnetic material disposed between the ferromagnetic rings or discs. The shaft 1, Fig. 1, carries a hub 2 of non-magnetic material on which are mounted ferromagnetic rings 3. Permanent magnets 4 arranged with their axes parallel to the shaft bridge the gap between the rings. A ring 5 of non-ferromagnetic material is inserted between the outer ends of the rings. The periphery of the roller may be profiled. A number of these rollers may be arranged side-by-side with like poles adjacent to one another. In a modification, Fig. 6, the permanent magnets 4 are arranged radially. The hub 2, which may be made of an aluminium or magnesium alloy, carries a ring 6 of ferromagnetic material on which the inner ends of the magnets rest. Rings 7 of ferromagnetic material are mounted on the magnets 4 and are separated by a ring 5 of non-magnetic material. The sides of the ring 6 and the inner ends of the magnets may be bevelled. The ring 6 may be omitted. In another modification, Fig. 9, a ferromagnetic body 9 having a central rib 10 is mounted on the hub 2. The magnets are arranged with like poles opposite to each other and carry rings 7 of ferromagnetic material. In a further modification, Fig. 11, the magnets 4 are inserted radially in recesses 12 in hubs 11 of ferromagnetic material and carry rings 13 of the same material. Rings 14 of non-ferromagnetic material are placed between the rings 13 and the sides of the recess. A component of this multiple system when used alone may have its peripheral surface sloped or formed as a convexity or concavity. When it is desired to rotate a piece of work, e.g. a tube 16, Fig. 16, during conveyance, one edge 17 of the hub 11 is made to project considerably beyond the other and the rings 14, 13 are bevelled. A stand 18, Fig. 19, provided with rollers 19, 20 may be used to hold a rod 21 while operations are performed on it. A number of such stands each carrying a single roller may be disposed more or less uniformly to support sheetmetal. When the distance through which an article is to be transported is less than the circumference of the roller, a segment 22, Fig. 20, is made non-magnetic, or substantially so, in order to facilitate removal of the article.