US885211A - Pulverizing-mill. - Google Patents

Description

LEVI D. YORK, OF PORTSMOUTH, OHIO.

PULVERIZING-MILL.

Specification of Letters Patent.

Patented April 21, 1908.

Application filed May 13, 1907. Serial No. 373,328.

T 0 all whom it may concern:

Be it known'that I, LEVI D. YORK, a citizen of the United States, and resident of Portsmouth, in the county of Scioto and State of Ohio, have invented certain new and useful Improvements in Pulverizing-Mills, of which the following is a s ecification.

The characteristlcsan advantages of the invention are hereinafter fully set forth in connection with a detailed description of the accompanying drawing which illustrates. exemplifying structures in which the invention is embodied, and in which Figure 1 is a plan View of a ulverizing mill, Fig. 2, a vertical section of Fig. 1, Fig. 3, an elevation, Fig. 4, a detail of the rotary member, Fig. 5, a screen boxes, and screen box.

The mill rests on a base 1, havin a central upwardly projecting cone 2. Thelower ulverizing ring 8 rests on the base surroun ing the cone. Three uprights 4 converge near the top of the mill at 5, where a spherical socket is formed to receive a spherical bearing-member 6. The weighted driver 7 ref erably consists of a heavy mass of meta and has an operatively integral shaft 8 extending upward from it, passing through bearingmember 6, with a sliding fit. Seated in the bottom of the driver is the upper ulverizing ring 9, and balls 10 of any suitalile number run between rings 3 and 9, supporting the driver and serving as the rolling crushing members.

The base carries uprights 11 and between these uprights are removably secured screen boxes 12 of a suitable number, each comprising solid top and outside plates 13 and a ig. 6 an elevation of a screen 14 of a mesh suitable to the work forwhich the mill is intended, forming the inside surface of the box. The boxes are open at the bottom and communicate with a circular chamber inclosed by housing 15, which rests on the base.

Driver 7 is provided with a plurality of spiral vanes extending from bottom to top of the outside surface. These vanes are curved, as best seen in Fi 4, so that at the bottom they present a s arp an le to the vertical and at their tops are near y parallel with the axis of the drlver. The angle and shape of the vanes may of coursebe varied to suit different workin conditions.

In operation materia to be pulverized is fed into the hollow bore 17 of shaft 8 and Ian view of one of the falls upon apex of cone 2, which directs it to ls, by which it is pulverized. The pulthe ba verized or partially pulverized material thrown out from the crushin balls is scooped up by the vanes and elevated toward the top 0 the rotor and at the same time thrown outwardly, forcibly against the screens, through which the material which is roperly pulverized passes, theremainder ropping' ack to be again subjected to the action of the balls. The pulverized material falls through the bottoms of the boxes into the annular chamber formed by housing 15. A plate 18 rests on top of uprights 11 surrounding shaftS, with more or less clearance, and serlilres to prevent dust from rising from the m1 a For advantageously removing the pulver ized material fromthe mill I rovide a conveyer, which will now be described: A ring of L-shaped ange-iron 2O rests in the chamber in housing 15 with its open sides facing down and inwardly. At suitable intervals the ring is provided with blades 21 extending inward,

and the outer web of the ring is provided with perforations 22 engaged by t e teeth of a spur wheel 23 earned on shaft 24, which is revolubly journaled in bearings carried by the base and one of the uprights 4.. Shaft 25 carries at its upper end alarge pulley 26, which is driven by a small pulley 27 on shaft 8 and 'a belt. The main shaft is driven by means of ulley 29 from any suitable source of ower. ile the'machine is in operation sha 't 24 is driven slowly from the main shaft and ring 20 is rotated, causing blades 21, which come in contact with the pulverized material, to carry the material around within housing 15 to one or more chutes 30, from which it is delivered to suitable receptacles.

As special oints of advantage in my invention the fbllowing are to be noted-the vanes on driver 7 not only throw the ulverized material outward by centrifuga force, but elevate it so that it is thrown against the whole surface of the screen. The screen surface is very large, which is made possible crushing process. The conveyer is an operatively integral part of the mill and provides means for continuously and easily removing the product.

Having described my invention, What I claim is:

1. In a pulverizing mill, the combination of a driver, a shaft therefor, an annular chamber into which pulverized material falls, an annular conveyer in the chamber, a pinion engaging the conveyer, a pinion shaft, pulleys on the driver and pinion shafts, and a belt connectin the pulleys.

2. In a pu verizmg mill, a cylindrical driver, a shaft extending from the top there of, the driver and shaft having a cylindrical bore, a base, pulverizing rings carried by the base and driver, balls running between the rings and carrying the driver, spiral vanes running from top to bottom of the cylindrical surface of the driver and screens surrounding the driver.

3. In a pulverizing mill, a cylindrical driver, a shaft extending from the top thereof, the driver and shaft having a cylindrical bore, a base, pulverizing rings carried by the base and driver, balls running between the rings and carrying the driver, spiral vanes running from top to bottom of the cylindrical surface of the driver, screens surrounding the driver, a sleeve on the shaft forming a sliding fit and having a spherical member, and a stationary support having an internal spherical surface engaging the spherical member.

LEVI D. YORK. Witnesses B. L. LINDSEY, EDW. FEAZEL.

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