US651338A - Flour-bolter. - Google Patents

Description

No; 65!,338 Patented June l2, I900.

. F.- w.. BROWN.

FLOUR BOLTER.

7 (Application filed Mar. 22, 1899.) (No Model.)

3 Sheets-Sheet l.

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' Pafented Julie. *2, I900. F. w. BROWN. rLouR BOLTEB.

(Aimplication filed Mar. 22, 1899.)

3 Sheetsr-Sheet 2.

(No Model.)

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THE moms PETERS to, mom-um No. 65l,3-38. I Patented June I2, I900.

F. W. BROWN.

FLOUR BOLTER.

(Application filed Mai. 22, 1899.)

(No Model.)

3 Sheets-Sheet 3.

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THE NORRIS FUERS c0, PHOTO L|THO., wAsmNaTan. n. c

STATES PATENT @FFIQE.

FREDERICK /V. BROWN, OF LEE BELT), \VEST VIRGINIA.

FLOUR-BOLTER.

SPECIFICATION forming part of Letters Patent No. 651,338, dated June 12, 1900.

Application filed Mar h 22. 1899- To all whom it may concern.-

Be itknown that I, FREDERICK W. BROWN, of Lee Bell, in the county of Randolph and State of West Virginia, have invented anew and Improved Flour-Bolter, of which the following is a full, clear, and exact description.

My invention relates to an improvement in flour-bolters of that class which are given a bodily movement in a circular path, and comprises novel features which will be hereinafter described and claimed.

Reference is to be had to the accompanying drawings, forminga part of this specification, in which similarcharact'ers of reference indicate corresponding parts in all the views.

Figure 1 is a plan View of the bolter. Fig. 2 is a sectional elevation taken on theline 2 2 of Fig. 1. Fig. 3 is a sectional elevation taken on the line 3 3 in Fig. 4 through one of the bolting-screens and chutes and the cut-off which is placed thereon. Figs. 4, 5, and 6 are sectional-elevations of the bolter, taken, respectively, on the lines 4 4, 5 5, and 6 6 of Fig. 1; and Figs. 7 and 8 are respectively a plan and an elevation of a plate which is secured to the bolter and surrounds the crank by which the bolter is made to move in a circle.

One object of my invention is to construct a condensed machine which will have large capacity in a small space and which will also be easilyaccessible for repairs and to provide the same with a cut-off, by means of which the area of the bolting-surface may be adjusted to correspond with the condition ofthe stock and the rapidity of its'bolting.

Another object is to provide means by which the bolter may be balanced whilerun ning, so as to adjust it for different conditions. v

The bolter in general is of a triangular form, the bolting-chambers A being rectangular in cross-section and connected at their ends, so as to form atriangle. Three of these bolting-chambers are thus used, the chamber A being the one which is shown in section in Fig. 4, the chamber A in Fig. 5, and the chamber A in Fig. 6. These bolting-chambers contain a series of sieves and bolting-cloths, together with the necessary chutes for conveying the flour, and are connected at their ends, so-as to discharge into the end of the another set of rolls.

erial No. 710,075. (No model.) v

bolter for treatment in another set of rolls,

this is' done by makingthe discharge-opening at the end of the bolter, where spouts a are secured and from which the stock is conveyed by suitable spouts to the point required. The openings through the side wall of one bolting-chamber into any of the next chambers is indicated by a in; Figs. 4, 5, and

6. It is evident that the stock may be passed through as many of these chambers in succession as desired or discharged at any time from the end of the bolter and conveyed to The exact manner of passing the stock through the bolter and the rolls is not thought to be essential to an explanation of my present invention and has therefore not been illustrated and will not be described in detail. The exact course of the stock would vary somewhat, according to the circumstances of different cases. It may be varied to meetthe ideas of the miller; but I will here say that the plan' here described is to handle five reductions-yet as many more, or even as many as may be desired,

may be handled in this style of bolter'and .at. the same time handling each reduction separately one from the other.

The different sets of screens and'boltingcloths, with their chutes, are indicated by numerals running from 1 "to 18 and are shown in Figs. 4, 5, and 6. These numerals are arranged to indicate the course of the 1 stock by what is considered a preferable manner of treatment. This may, however, be varied, if desired. When the stock is returned from the rolls to the bolter to be introduced into one of the lower bolting-frames, it is passed through the end of one of the boltingchambers, as indicated at a in Figs. 4 and 6 and a in Fig. 5.

The bolting-chambers are suspended by three links H, which are shown in Figs. 1 and 2. These links are pivotally connected with the outer ends of the chambers and also to the ends of cross-bars I, which are suitably supported upon the framework of the bolter. This framework consists of a base'G, vertical posts G, and the cross-bars I, from which the links are suspended. This leaves the bolter free to be swung in a horizontal plane.

At the inner sides of the bolting-chambers is secured a plate O,(shown in detail in Figs. 7and 8,) which is provided with a removable cap P, adapted to secure the plate to the crank J of a vertical shaft J, which shaft is provided with a pulley J, by means of which it may be rotated. As the shaft is rotated it will by the connection of the plate 0 therewith and to the bolter swing the bolter in a circular path, thus agitating the bolter and the stock therein, seats to cause the stock to feed down the inclined bolting-frames.

The operation of the bolter, like all other bolters, will vary somewhat under different conditions of the weather and the grain from which the stock is made. \Vhen the weather or the grain is dry, the stock will pass through the bolter more rapidly than when either is damp, and it is therefore advisable to have the bolting-cloths of sutfieient capacity to care for the stock which will pass through the sieves when the weather or the stock is damp and to provide a cu t-off to decrease the amount of bolting-surface when the stock is dry. This decrease in the bolting-surface to secure the best results must be provided for at the upper ends of the bolting-cloths. This is secured by the cut-01f O. (Shown in Figs. 4, 5, and 6.) This cut-off is shown in cross-section on a larger scale in Fig. 3 and consists of a plate D, which is provided with central openings d, the two adjust-able plates E and E, and the threaded rod F, which extends out through the adjacent; or overlapping chamber and by means of which said adjustable plates are operated. The plate D is slightly concaved on its upper surface, so that the stock will work toward the center and into the openings (1. The plates E and E are mounted to slide in a groove in cleats d, secured to the under surface of the plate D. Each of the plates E and E is provided with downward ly-extending locking-arms e and c, which are threaded to receive the threaded rod F. These arms are at opposite ends of the cut-off plates and are provided with threads of different pitch, as are also the threaded sections of the rod F. That portion of the rod and the arm 6 which operates the cut-off plate E is provided with a thread that has half the pitch of that which acts upon the cut-off plate E, so that when the rod is turned in one direction the plates will be extended partially over the bolting-cloth, as shown in Fig.4, the plate E being moved with half the speedof the plate E, so that the plates will reach the end of their travel at the same time.

When the rod is turned in the opposite direction, the plates will be moved in the opposite direction from over the bolting-cloth and will lie one over the other in the end of the adjacent or overlapping chamber, thereby permitting the entire surface of the bolting-cloth to be used. The outer end of the rod F is provided with a crank f or other suitable means by which it may be turned.

A limited number of the cut-off devices are provided, the same being used only where the change is made from a sieve to a bolting cloth or where the material has just been passed through a sieve after being received from a set of rolls. Single plates may be used where a less amount of cutting off is considered sufficient. Where bolting-cloths only are used, the plate D and the cut-off devices are omitted from the device, as it is shown in Fig. 3, the bolting-cloth B and the chute B, which is concaved in its upper surface, being used alone. In some cases, as with the chutes 13 and 18, (shown in Figs. 6 and 5,) the chute B only is used. In this case it is simply desired to transfer the stock or flour from one end of the bolting-chamber to the other. This is in order that the flour and off-fall which is leaving the bolter or stock that is leaving the bolter for further treatment in the rolls may each be separately discharged at one of the three places for leaving the bolter. With bolters of this character which have a rotary movement it is nec essary to provide some counterbalance to prevent the bolter from racking the machinery and the mill itself. Such counter balance is usually provided in a wheel K, which is attached to the power-shaft J. I have shown herein a device of this character which may be adjusted while the bolter is in operation, and thus maintain accurate balance under varying circumstances. When the stock is a little damp, more stock will be held in the bolter than when the stock is dry, which will result in changing the balance of the bolter. The balance of the bolter will also be changed during the course of a days run.

It is advisable to have a means for adjusting the balance which may be used while the bolter is in operation. My device for securing this result is shown within the wheel K, which is secured to turn with the shaft J. In this wheel is mounted to turn a radiallyextending rod L, which has a threaded section upon which is placed a threaded weight L, which is prevented from turning by engaging guides upon the wheel. Upon the inner end of the rod L is secured a beveled wheel L Secured about, but so as to slide upon, the shaft J is a double-ended friction wheel. or spool M, which is adapted to be moved vertically so as to engage the beveled ends thereof with either side of the frictionwheel L This spool is secured to the lower end of a link M so that it cannot turn, and the link is secured to one end of the lever M, which is pivoted upon a cross-bar I or any other suitable fixed support. For convenience in operating this lever at a distance a cord M is secured to its outer end and has one end extending directly down and through the floor or to any convenient operating point and the other end passing first through a pulley M connected to a beam N above the lever, and then downward to said adj usting-point. By this means the lever may be operated so as to engage either end of the spool M with the friction-wheel L and the rod L may be turned so as to throw the weight L nearer to or farther from the center, and thus change its running balance to correspond with that of the bolter.

In order that the miller may know just what the balance of the bolter is at any time, an indicator is provided, consisting of a bellcrank lever N, which at the bend is pivoted to one of the cross-bars I, forming the frame of the bolter, and has the upper end of the vertical arm N pivoted to the beam N or any other fixed support not a part of the bolter. At the outer end of the horizontal arm, which should preferably be the longer arm in order to magnify any movement of ,the bolter, is secured a wire or cord N, which extends downward to the point from which the balance of the wheel is to be regulated. Upon this cord or wire is secured a weight N the movement of which will indicate whether or not the bolter is running in true balance. If the bolter is balanced, the crossbar of the frame will not be shaken, but left quiet, as will consequently the weight N but if the bolter is out of balance the bolterframe, which includes the bar I, will be shaken, and the weight N will indicate this. By observing the action of this weight and by pulling upon one or the other branches of the cord M the bolter may be accurately balanced from a distance without even seeing it.

By arranging the bolting-chambers in triangular form, suspending them from the angles of the triangle, and locating the operating mechanism in the space between the said chambers a bolter having great capacity and occupying a small space will be produced; the bolter can be easily and readily balanced, enabling a uniform gyratory motion to be imparted to the same without any backlash common to this class of machines; provision made for supporting three bolting-chambers from three links and equally distributing the weight thereof on said links; aportion of one chamber is made to serve as a housing for the cut-off of the adjacent chamber when said cut-off is withdrawn from over its boltingcloth, and the operating mechanism can be made lighter and therefore more readily and easily balanced.

Having thus described my invention, I claim as new and desire to secure by Letters Patent- 1. A cut-off for bolters, comprising two superposed plates having threaded arms, and

a rod engaging both of the said arms and threaded in sections of different pitch, the arms being correspondingly threaded, whereby both plates are moved simultaneously and at different speed s,substantially as described.

2. A bolter mounted to move in a circular path, a power-shaft having a crank thereon and connected with the bolter to move it,a threaded rod mounted radially of and to revolve with the power-shaft and to turn in bearings, a weight threaded upon said radial rod and held against turning, a beveled friction-wheel secured to the inner end of the radial rod, a spool or double ended cone slidable upon the power-shaft and engageable with the friction-wheel, and means for moving said spool, substantially as described.

3. A balancing mechanism for a revolving body, comprising a radially-extending rod mounted to revolve with said body and to turn, and having a threaded section, a weight threaded upon said rod and held against turning, a wheel upon the rod for turning it, and non-rotating actuating mechanism therefor, movable into and out of engagement there* with, substantially as described.

4:. A balancing mechanism for a revolving body, comprising a radially-extending rod mounted to revolve with said body and to turn, and having a threaded section, a weight threaded upon said rod and held against turning, a wheel upon the rod for turning it, a double-ended friction device mounted at the center of revolution of the said rod and its wheel, and movable to engage opposite sides thereof with the wheel, and means for moving said friction device, substantially as described.

5. A balancing mechanism for a revolving body, comprising a radially-extending rod mounted to revolve with said body and'to turn, and having a threaded section, a weight threaded upon said rod and held against turn ing, a friction-wheel upon the inner end for turning it, a spool mounted in the center of rotation of said rod and movable transversely thereof to engage the friction-wheel on its upper or lower edge, and a lever connected with said spool to move it, substantially as de scribed.

6. A bolter, comprising three bolting-chant bers connected with each other and arranged in triangular form, a link at each angle and by which the chambers are suspended, and means arranged in the space between the chambers, for imparting a gyratory motion tothe said chambers, substantially as described.

7. A bolter, comprising three bolting-chambers connected together and arranged in triangular form, a link at each angle by which the chambers are suspended, a shaft arranged in the triangular space between the chambers and provided with a crank, and a frame secured to the chambers and in which the crank of the said shaft is journaled, substantially as described.

8. In a bolter, the combination with gyra venient observation point, substantially as shown and described.

10. A balance-indicator for rotary swingr 5 in g bolters comprising a lever pivoted to the stationary frame of the bolter and to a fixed object and a cord extending from said lever to a convenient observation-point. I

FREDERICK W. BROWN.

Witn esses:

J. R. WATERS, ONA B. WATERs.

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