US417630A - Rotary bolt - Google Patents

Description

(No Model.)

4 SheetS-Sheet- 1.

J. M. CASE. ROTARY BOLT;

Patented Dec. 17, 1889.

N. PEYERS. Fhalo-Lilhigmpher. Warhingmn. n c.

7 4 Sheets-Sheet 2. J. M. CASE. ROTARY BOLT.

(No Model.)

Patented Dec. 17

FIG

N PETERS. Plwlo-Luhngmpher, Waihingwn, D. C.

(No Model.) 4 Sheets-Sheet s.

CASE.

- ROTARY BOLT.

No. 417,630. Patented Dec. 17, 1889.

N'QMQ'aeL I 4 Sheets'-Sheet 4.

J. M. CASE.

ROTARY BOLT. Dim-417,630. Patented Dec. 17-, 1889.

' FIG -v N. PETERS, mmmho nmr. Wuhingtwi. 0.04

UNITED STATES PATENT OFFICE.

JOHN M. CASE, OF

COLUMBUS, OHIO, ASSIGNOR TO THE CASE MANUFAC- TURING COMPANY, OF SAME PLACE.

ROTARY BO LT.

SPECIFICATION forming part of Letters Patent No. 417,630, dated December 17, 1889.

Application filed June 3, 1887. Serial No. 240.179. (No model.)

To all whom it may concern:

Be it known that I, JOHN M. CASE, a citizen of the United States, residing at Columbus, in the county of Franklin and State of Ohio, have invented certain new and useful Improvements in Rotary Bolts, of which the following is a full, clear, and exact description.

My present invention relates to that class of rotary bolts which are provided interiorly with means for scooping up the material on the ascending side, carrying itover the shaft, and again dropping it on the descending side of the reel.

The invention consists in certain features of novelty hereinafter particularly pointed out in the claims, being first fully described with reference to the accompanying drawings, in Which,

Figure I is a vertical transverse section of a bolt constructed according to my invention. Fig. II is a transverse section of a reel constructed according to my invention, and in which the means for supporting the hoops over which the cloth is stretched differ slightly from those shown in Fig. I. Fig. III is a vertical longitudinal section of a bolt constructed according to my invention, and in which the means shown respectively in Figs. I and II for supporting the hoops over which the cloth is stretched are both employed. Fig. IV is an elevation of one of my improved spiders, differing from the spider shown in Fig. II only in that the rim or flange formed as hereinafter described is of slightly-different shape. Fig. V is an elevation of one of myimproved spiders, which differs from the spider shown in Fig. II only in that it is formed 'of a plurality of sections secured together instead of being formed of an integral casting. Fig. V1 is an elevation of one of my improved spiders, which difiers from the spider shown in Fig. I only in that it has provision for scoops or buckets with curved instead of straight sides. Fig. VII is a detail view of a fragment of one of the hoops over which the bolting-cloth is stretched, showing its covering of pile fabric or other soft material.

A represents the frame or casing within which the bolting-reel is journaled; B B, cantboards onto which the material passing through the reel falls, and by which it is conveyed to the upper one of two conveyer-troughs C C, within each of which troughs is situateda spiral conveyer D, the fioor of each trough being provided with numerous cut-off valves throughout its length for facilitating the separation of the material into the desired number of grades.

E is a cant-board situated beneath the tail end of the reel for catching the material tailing off and conducting it to a suitable conveyer or receptacle.

F represents the shaft of the reel, which passes through apertures formed through the opposite ends of the casing, andis journaled in boxes supported by bracket arms G, secured to the frame of the casing.

The aperture at the head of the machine is of sufficient area to leave an annular space around the shaft to admit the material to be treated, the material being conducted to the interior of the casing through a pipe H,-having a horizontal portion concentric with the shaft F,and a vertical portion, the back wall of which is perforated for the passage of the said shaft.

I represents a spiral conveyer secured to that portion of the shaft which is situated within the horizontal portion of the pipe H for feeding the material into the bolt.

J represents a sheet or strip of canvas depending within the casing and resting upon the reel for the purpose of keeping its meshes free.

Thus far I havedescribed nothing novel,a description of these parts being given only.

for the purpose of conveying a thorough the characteristics of which are a band or collar 0, preferably of polygonal form, for embracing the shaft F, to which it is secured by screws or other suitable means, and an open frame having crotches for receiving the troughs or buckets P, which are open in the direction in which they travel, whereby they scoop up the material on the ascending side of the reel, carry it over the shaft F, and again discharge it on the descending side of the reel. I prefer to construct each of these troughs or buckets of two strips of wood p and p, secured within the crotch so as to form a trough of substantially V shape in crossection; but I desire to have it understood that I do not confine myself to this particular mode of constructing them. They may be formed of iron or other material, orot one, two, or more pieces, and of any shape in crosssection which shall be capable of producing the desired result-that is to say, the buckets ortroughs must, for the purpose of my present invention, be of such shape and so situated with relation to each other and the axis of the reel that each successive bucket will scoop up the material on the ascending side of the reel and without spilling any unless the reel be overloaded, in which case each trough will deposit its surplus into the space between it and the preceding trough'or bucket just bcfore dumping and carry the proper amount OX'GT the reel-shaft and dump it at or slightly below a point opposite horizontally to the reel-shaft onto the descending side of the reel. \V hen dumped, the material will either fall directly onto the surface of the reel or else onto the back of the next preceding bucket or trough. If the material strikes the back of the next preceding bucket or trough, it is deflected outward and onto the bolting-surface at the above-named desired point.

I am aware that these buckets or scoops have been arranged on the outer surface of an impervious drum secured to the reel-shaft concentrically within the reel; but this has many disadvantages and is not the equivalent of my invention.

I am also aware that buckets or troughs of various shapes in cross-section have been arranged in circular series within bolts, and variously supported without the use of an impervious drum, so as to leave open spaces between them, and do not claim such, broadly, as my invention.

Heretofore the construction and arrangement of these buckets have been such that the material will spill or be discharged into the spaces between them, while one of the principal objects of my present invention is to have the buckets or troughs arranged with open spaces between them for the free circulation of air, and to so situate said buckets that they will not discharge the least bit of material unless the reel becomes overloaded, in which case it is an advantage to have the surplus discharged, as will appear below, through said spaces, the space in closed within the circular series of troughs or buckets being employed as an exhaust-chamber, with which communicates the exhaustrair trunk K. The object of this arrangement is to cause a gentle current of air through the material as it is precipitated, whereby the light fluffy particles (these being chiefly instrumental in choking up the meshes of the bolting-cloth) may be separated and drawn off from the good material.

In reels as heretofore constructed the material is not delivered in one column opposite the center of the reel-shaft, but the buckets begin to spill oit gradually as the reel revol ves, dropping a large proportion of the material in the center of the reel, so that it does not get the action of sliding down upon the descending side. \Vhat is not delivered back of the buckets falls on top of the next bucket in advance, and gradually spills ott as the reel rotates, and in view of the fact that the reel and material are both descending in one direction there could be but a trifling action of the material upon the cloth, owing to the fact that without a momentum of the material delivered from a suitable bucket at one time it could not travel down the reel any faster than the reel itself traveled, and consequently the boltin g capacity would be correspondingly decreased.

Myimproved buckets, mounted atthe angle described, deliver the stock at a point above one-half of the distance from the horizontal diameter to the top of the reel and dump upon precisely the same principle as the elevator-bucket, which is known in practice to empty at once the whole volume of material, instead of allowing it to drizzle oil." gradually or fall upon the bucket in advance, as in machines heretofore made. By the discharge of the quantity of material as a whole from a point considerably above the horizontal diameter it attains a speed greater than that of the descending side of the reel, and consequently slides down that side in a mann er calculated to produce the greatest amount of bolting capacity,

Supporting buckets upon spiders is the only practical manner of building a reel, for the reason that sometimes the miller will place a larger quantity upon the reel than it can properly handle, and as one of the main objects in forming these buckets in sections, leaving a space between them, is to permit the surplus material to drop down into the center of the reel, in cases where it is overloaded and the bucket takes up too much, the proper amount only will be precipitated against the boltingcloth and the choking of the same thereby prevented.

It has been found in practice that all round reels having a solid inside center get choked up, owing to the fact that there are times when a surplus of material is thrown upon the reel, more than will pass down toward the tail, and as a result the reel fills up and becomes one solid mass of material. The same also will occur when by accident very greatly increased quantities of stock are temporarily thrown upon bolting-reels. The openings between the buckets prevent this choking taking place.

The proper point to deliver the material against the cloth is at or slightly below the 7 horizontal diameter of the reel, for if it is delivered above the horizontal diameter it would rebound backward and skip for some distance before it would again reach the cloth, which would limit, instead of increase, the capacity of the bolt. I have arranged the buckets in my present invention in such a manner as to deliver the material at the above-named desired point, and this, together with the momentum the material receives from gravitation, are novel features of vital importance, because the material thereby travels down the proper portion more rapidly than the reel revolves, and, being instantly taken up by the other side, is kept in 0011- stant activity on both sides of the reel.

Although I state that the buckets are relieved of surplus of material, yet I desire it to be understood that ordinarily in practice the reel is supplied with the proper amount of material only to enable the buckets to carry what they take up over beyond the shaft and deposit it at the proper point without spilling any of it. There are so many conditions and circumstances upon which the accomplishment of this result depends that it is impossible to specify any one particular construction and arrangement of the buckets which is essential. The width of the inner side 19 of each of the buckets, its angle with relation to axis of the shaft, its proximity to the bucket immediately in front of it, the quantity of material which the outer side 1) scoops up, and the momentum of the reel are all factors which enter into the problem, and each may be varied accordingly as the others bear one or another relation with respect to it. It can therefore only be said, in general terms, that these parts should bear such relations to each other that no bucket shall commence to discharge until it has reached such a position that its contents shall not fall into one of the spaces between its forward edge and one of the buckets in advance of it.

In Figs. I, II, and V I have shown the front and rear sides of the buckets of equal width and the buckets placed in such proximity to each other that one-half the available space on the spiders will be taken up by the inner boards 13, open spaces of equal area being left between the adjacent cups for the passage of air. The angle of the outer boards 19 should be such that they will not only scoop up the material on the ascending side of the bolt, but will act as deflectors for throwing the material which falls on their backs on the descending side of the reel outward instead of inward.

In Fig. IV I have shown the inner boards p of greater width than the outer boards 19, sot-hat they occupy more than one-half the available space on the spiders, the angles of both boards with relation to each other and to the axis of the reel being different from Figs. 1, II, and V.

In Fig. VI I have shown a spider with crotches for receiving curved instead of flat. boards 13 p, so that the troughs when formed will be of U shapein cross-section. Aminute description of this modification is not deemed necessary, as I regard the troughs of U shape in cross-section in all respects the mere equivalents of those of V shape. The spiders O consist of inner collars 0, for embracing the reel-shaft, and any desired number of spokes O, for supporting the outer rim, which has any desired number of crotches 0 which latter are formed by the intersection of branches 0 and 0 meeting at the angle which it is desired that walls 1) and p of the buckets shall bear to each other, the outer sides 10 of the said buckets being secured to the branches O and the inner sides 13 to the branches 0*, by screws or bolts, for the passage of which said branches are perforated, as indicated in Fig. IV. The branches 0 constitute the outer rim.

In Figs. I, II, and V each of the branches 0 is shown as formed in two planes, all said branches being united end to end, so as to constitute in effect a polygonal rim with which the bases of the branches 0 unite, while in Fig. IV each of the branches 0 is shown as formed in a single plane and extending from the base of one of the branches 0 forward to the next branch 0 with the back part of which it unites some distance from the base. This arrangement is such that the branches 0 form braces at the backs of the buckets for strengthening the branches 0 this being the preferred form of spider. For forming new reels it is preferred to form this spider of a single casting; but for reconstructing old reels it is preferred to form it in sections and secure the sections together by bolts or other suitable means, as shown in Fig. V, for the reason that such a spider may be applied to the shaft without removing the latter from its bearings.

In Figs. I and III I have shown the spider cast with arms 0 projecting radially from the rims or branches 0, to the extremities of which arms the hoops M are secured. These arms may, however, be omitted, as it is intended to employbut two spiders (one at each end of the reel) and to support the hoops, which are preferably placed about eighteen IIO inches apart, by means of braces Q, bolted 7 by screws, as shown in Fig. IV, or otherwise, one board effectually holds the other against fiexure, thereby constituting troughs or buckets of sufficient rigidity to support the hooks.

The usual longitudinal ribs or braces for sup porting them maybe entirely dispensed with. One end of each of these braces Q is formed at an angle, as shown in Fig. II, and perforated for the passage of the screws, belts, or rivets by which the hoops are secured. The other end is also perforated for the passage of the bolts by which they are secured to the troughs or buckets. but need not be bent, as they are designed to fit flat against the outer side 1) of the trough, as shown.

I have shown in the drawings a reel provided with only two spiders but in long reels this number may be increased, as may be found necessary, to gi re the reel the necessary lateral stability.

Having thus described my invention, the following is What I claim as new therein and desire to secure by Letters Patent:

1. In a reel, the combination of the shaft, a pair of spiders situated at the desired dis- 'tances apart and having arms 0 projecting therefrom, the hoops secured to the extremities of said arms, the rigid longitudinal troughs or buckets supported by said spiders, the braces situated at suitable distances apart and projecting outward from said buckets, the hoops secured to the extremities of said braces, and the bolting-cloth stretched over said hoops, substantially as and for the purpose set forth.

2. In a rotary bolt, a spider constructed of the inner collar, the spokes, and the outer rim having any desired number of crotches formed by the branches 0 and 0, said branches t)" forming braces at the backs of the branches substantially as set forth.

8. In a rotary bolt, a spider constructed of the polygonal inner collar 0,the rad1al spokes O, the branches 0", constituting an outer rim, and the short. branches 0', extending from said rim at an angle to the branches 1), all of said parts being formed integrally, as set forth. w

4. In a rotary bolt, the combination of the spider formed with the erotches, the boards secured at an angle to each other in said crotches and having their meeting edges secured together, whereby they are both prevented from bending, and the braces Q, scoured to the boards and carrying the hoops on which is stretched the boltingcloth, Whereby a stiff support for said hoops is provided,

as explained. p

JOHN M. UAbE. Witnesses:

E. D. ANDERSON,

I. N. SIIOUGII.

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