US 874982 A
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HENRY O. NORTON, OF SAN FRANGISGO, CALIFORNIA.
'No. 874,982. Evpeeificat Applicatioulilcd Septemberl 7 To all whom it may concern.-
Be 1t known that I, HENRY C. Neuron,
citizen of the United States, residing in. the K city and county of San Francisco and State.
of California, have invented new and useful Improvements in Cotuveyer-Belts, of which the followin is a specification.
My invention relates to c'onveyer belts,
and especially belts of the trough type for use on dred ers and the like, for conveying stones, rocks, tailings, gravel, and other or like abrasive material.
The conveyor belts used on dredgers are commonly designated as stacker belts, and are usually about thirty inches wide, being made of rubber and fabric; and being very long and heavy, are quite expensive.
The wear on these belts comes almost 61":- tirelyin their center, or the bottom of the trough, and after a few months use the belts. become worn. out and useless. Although the Wearing surface of these belts is usually provided with a heavy layer of soft rubber to protectthe fabric and to relard the slippage of the stones, yet, at the same time, these wearing surfaces being smooth, do not prevent the backward rolling of the stones and gravel, with a consequent heavy-wear on the the rubber or fabric of the belt.
belt, kid a resulting mine owner.
It is my purpose to co) vstruct these heavy conveyor trou h belts with a central corrugated or roug iened portioi, which, while, giving additional thickness and strength to the points of the belts where most needed, will also provide means, in. the nature of pockets or ritlies, for the catchment of the finer sands and gravel; and which sands and gravel, lodging in these pockets, will serve as a cushion on which the heavier d aggcd rocks and cobbles will stri re and rest, without really comiag'in abrasive cimtact with These pocl ets or riflles, corrugations, projections, or the like, which I contemplate usi.:..g, will operate l gravel, urce of heavvexpense to the and which rolling is in fact the re heaviest wear nowadays on the her Having reference to the accompanying drawings l igure 1 1s a plan view representiug the preferred form of the invention.
2--34- represent modi'ie-ations of the sanie. Fig. 5 is a transverse section of l.
A indicates a conveyer belt which-may be thirty inches, more or less, in width, and made of any suitable material;
" iers Patent. .Eatenteci 2121, 190?.
Serial No, 392.161.
The invention resides the-use of the rillles 2, which are shown in Fig. 1 as er" ranged diagonally of the belt, with the ends of the riflies adj accnt the center of the belt thicker and widerpaud with their outer ends tapering oil, more or less, to apoint towards the outside of the belt. These rili'les, however, occupy only about half of the belt, so that with a thirty-inch belt the riflles would terminate about seven and one-half inches, more or less, from the edges of the belt. The innerand thicker ends of the riffles cross each other, so that a series of diamondshaped pockets 3 are formed along the longitudinal center of the belt. The size of these diamond-shaped spaces depends, of course, on the closeness with which the rifilesare placed. together, but ordinarily a pocket would be about four inches wide, as measused lengthwise of the belt. These rifiles 2 may be made integral with the belt, or they might be made of any suitable material, as leather, metal,'or a combination of rubber and fabric, and attached to belts already in use by any appropriate means. Being made thicker and wider where the most wear on the belt comes, they naturally reinforce the belt along this area of wear. More particularly, though, they form arresters to the backward flow? of the sand and gravel, and to the back ward rolling of the heavystones and boulders. The gravel and sand lodging in the pockets will be carried upward, and by forming layer over the portion of the belt carrying the load and subject to the roughest usage, will in a measure protect the belt, so that even. if some of the rocks and boulders roll backw r. they will roll on a layer of sand and gravel,
and will not come in direct contact with the belt. construction of this sort, the life of the belt will be materially lengtl'iened.
ln'Figs. 2, 3 and 4, l have shown modifications of the same idea. In Fig. 2, the riilles are arranged ii-shape, withthc apex portion of the rillies in the locus of thecentral axis of the belt, and made thicker and wider for the purpose of withstanding the wear. in Fig. 3, the rifiies 2 ez'rtend straight across the central half of the belt, and are made thicker ahd wider their middle, tapering off to either end. In Fig. 4, the belt f with a series of knobs, lugs, or prot 2 and preferably these knobs or o are thickest and biggest in the middle belt Having thus described my invention, what 1. A oonveyer belt of the trough type, having a central wearing surface corrugated with the outer ends of the corrugations terminatin g a considerable distance from the side edges of the belt. 4
2. A conveyer belt, having its longitudinal central'portion only corrugated with the cor rugations of tapering form and the widest polrtions thereof located in the center of the be t.
3. Av conveyer belt having a transversely corrugated wearing surface, thecorrugations being thickest and widest in the middle of the belt, and tapering off to nothing towards the edges of the belt and terminatinga considerable distance from said edges.
4. A conveyor belt, having pockets along I claim and desire to secure by Letters Patent 1S- its central wearin surface, said pockets formed by diagona ly disposedintersecting rifiies which decrease in horizontal Width outwardly towards the edges of the belt and whose outer ends terminate a considerable distance short of said edges.
5. A conveyer belt having pockets along its central wearing surface, said pockets formed by diagonally disposed intersecting riflles, said riflies being thickest at their lower ends adj ace nt to the center of the belt.
In testimony whereof I have hereunto set my hand in presence of two subscribing witnesses.
HENRY ,C. NORTON.
F. O. BUSHNELL, A. 0;SAVEAGA.