US310236A - Roller grinding-mill - Google Patents

Description

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ROLLER GRINDING MILL.

No. 310.236. Patented Jan. 6, 1885.

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W. H. WAKEFORD.'

ROLLER GRINDING MILL.

No. 310,236. Patented Jan. 6, 1885.

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UNITED STATES PATENT OFFICE.

VlLLIAM H. VAKEFORD, OF BALTIMORE, MARYLAND.

ROLLER GRINDING-IVIILL.

SPECIFICATION forming part of Letters Patent 1510.310236, dated January 6, 1885.

Application led January 15, 19E-l.

Z0 uit whom, t 'nt/ty concern.-

Be it known that I. Wn. H. WAKEFORD, a citizen of the United States, residing at Baltimore, in the county of Baltimore and State of Maryland, have invented certain new and useful Improvements in Roller Grindingflvlills;

' and I do hereby declare the following to be a full', clear, and exact description of the invention, such as will enable others skilled in the art to which it ap pertains to make and use the same.

This invention relates to a roller-mill composed of two corresponding lines of two or more rollers each, the respective rollers ot' each line being connected and driven one from the other by universaljoint couplings, so that each roller is independent of every other roller so far as removal or adjustment is concerned.

My improvement consists of certain novel combinations for adjusting and spreading the adjustable rollers, which combinations are specifically pointed out in the claims at the close of the specification.

In order that my invention may be clearly understood, I have illustrated in the annexed drawings and will proceed to describe a practicable form thereoi".

Figure l is a plan View o1' a roller-n1ill con-A taining four parallel lines of rollers and constituting a duplex roller-mill embodying my invention. Fig. 2 is an end view of said duplex roller-mill. Fig. 3 is a side view of the same. Figs. et to ll. illustrate details of the roller-mill.

The same letters of reference indicate identical parts in all the figures.

The essential parts being simply duplicated` it is only necessary, to a i ull understanding of the construction of the duplex roller-mill, to describe in detail one half or one side thereof, constituting a single roller-mill of my construction, and the ensuing description will be,

confined to that way.

As usual, each pair ol' rollers consists oi' a non-adjustablc/roller and an adjustable roller. I have shown a line of three non-adjustable rollers` marked A, B, and C, respectively, and a corresponding line of three adjustable rollers, marked A', B', and Cf, respectively. The rollers are made of increasing length, the rollj ustable rollers.

(Xo model.)

together by a suitable coupling capable of' transmitting the motion of one to the next.

I prefer to use a universal-joint coupling for connecting the journals ofthe nonadjustable rollers, the same as I use for connecting thejournals ofthe adjustable rollers, one forni of which will be presently described in connection with the description of the mode o1' arranging and coupling the adjustable rollers.

The use of universal-joint couplings for eonneeting the non-adjustable rollers is preferable to the use of an ordinary coupling, because it admits of slight divergences from perfect alignment of the rollers. The line ot' these non` adjustable rollers is driven by a pulley, E, keyed or secured to the journal ot` roller C. Each adjustable roller is journaled in a pair i ot' boxes seated, respectively, in dovetailed ways ofa pair ofl'red-plates, F. (Shown in detail in Fig. 7. )v Stif'fspiralsprings Gareinterposcd between the boxes of the non-adjustable rollers and the boxes oi' the adjustable rollers,

tending to push the boxes oi' the adjust-able rollers away from the boxes of the non-ad At the other side, each box of each adjustable roller is connected by toggle-joint H to a knee, I, which is constructed with a foot fitting in a dovetailed groove or way on the top ba-r of the main frame. The knee I is swivelingly connected to one end of a screw, l, which turns in a nut, l2, rigidljY secured to or formed on the main frame. The toggle-joint II is always held straight between the adjustable boxes and the knee l', ex-

cept at times when the rollers are separated, so that by turning the screw I' and thus moring t-he knee I the adjustable box may be slid on its bed-plate for the purpose ot' properly adj ust-ing the adjustable roller with reference tally-projecting armsk as there are adjust-able boxes and toggle-joints, each arm 7e being connected by a link, K', with the pivot-pin which connects the two bars of the toggle-joint. The rock-shaft K is provided with a suitable handlever, K2, adapted to be locked to a fixed rack, k'. By rocking shaft K in one direction the toggle-joints may be collapsed to the required extent, so as to allow the adjustable boxes and rollers to recede from the non-adj ustable boxes and rollers under the spreading action of the spiral springs G; and by rocking said shaft in the other direction and returning the toggle-joints to their condition of straightness all the adjustable rollers can be returned to the same position which they occupied before spreading.

In order that the adjustable rollers may be leveled, I provide the bed-plates F of their boxes with downwardly-projeeting tongues F', snugly fitting in holes in the cross-bars of the main frame, and apply a gib and key, f2, through a hole, j', of tongue F' beneath the said cross-bars for the purpose of vertically adjusting said bed-plates. After proper adjustment of the bed-plates F they are securely bolted to their supporting cross-bars of the main frame. Each adjustable roller can, by the means described, be separately adjusted with reference to its fellow non-adjustable roller. Like the line of non-adj ustable rollers, the line of adjustable rollers is driven by a single pulley, L, secured to one of the journals of the roller A', and in order that the remaining rollers B' and C may be properly driven from the roller A', whatever the adjustments ofthe respective rollers, I connect the adjacent journals ofrsaid rollers by universali-jointY driving-couplings.

'Ihe coupling illustrated consists of a pair of iianged sleeves, l\I M', secured to therollerjournals, and a series of bars, m, constructed with a ball at each end, as shown in Fig. 4, for connecting the sleeves, the ball ends ot' said bars being connected to the respective sleeves by two series of segmental caps, m', bolted to the ianges ofthe sleeves. Suitable sockets are formed partly in the sleeves and partly in the caps for the reception ot' the balls of the bars m, such sockets and the holes in the caps being made sufficiently large to admit of such play of the bars m as is required to permit of the independent adjustment of the rollers. To the same end the adjacent surfaces of the caps are made rounding.

Itis obvious that any known slip-joint universal driving-coupling may be used in place of the coupling described.

In the duplex mill illustrated I have shown the rock-shafts used for spreading the rollers of the two lines of breaks as connected by a link, so that the rollers of the two lines of breaks may be simultaneously spread. rIhe adjustable rolls of one series of breaks and the nonadjustable rolls of the other series -of breaks may be driven by a single belt running from a driving-pulley, as shown in Fig. 2. The belt N (shown in dotted lines in Fig. 2) extends from driving-pulley L2 over pulley L, secured to the journal of one of the adjustable rolls ot' the iirst series of breaks around an idler, L', thence over a pulley secured to the journal of one ofthe non-adjustable rolls of the other series of breaks, and thence back to driver L2, while the belt O (shown in full lines) extends from a pulley secured to the opposite end of the driving-shaft, over a pulley, O', secured to the journal of one of the adjustable rolls ofthe second series of breaks, around an idler, O2; thence over a pulley, E, secured to the journal of one of the nonadjustable rolls of the first series of breaks; thence back to the driver, the belt being crossed; but it is obvious that all the rollers of one series of breaks may be driven independently of the rollers of the other series of breaks of such a duplex roller-mill.- gearing may be used instead of belt-gearing for driving the rolls.

This roller-mill is to be provided with suitable hopper-s and feed-regulating devices; also with suitable means for separating the meal after each break; also with suitable means for transferring the tailings from the separator of one break to the hopper of the next break. All these means may be of well-known construction and applied in -the usual Way. Vhat I claim as my invention isl. The combination,.substantially as beforeA set forth, oi'l an adjustable box, an Yadjustable knee, and a toggle-joint for connecting said box to said knee.

2. rIhe combination, substantially as before set forth, of an adjustable box, an adjustable knee, a togglejoint for connecting said box to said knee, and a screw for holding and adjusting the knee.

The combination, substantially as before set forth, of the adjustable boxes of an adjustable roller, an adjustable knee for each box, togglejoints for connecting the boxes to the knees, a rock-shaft provided with arms, and links for connecting the arms of the rock-shafts with the toggle-joints.

In testimony Wh ereof I affix my signature in presence of two witnesses.

VILLIAM H. XVAKEFORD.

W' itnesses:

F. UEBEL, E. A. HEINZ.

Cog,

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