US240964A - peters - Google Patents

Description

(Model.) SSheets-Sheetl.

J. MVCASE. Flour Bolt.

No. 240,964. Patented May 3, |881.

N- PETERS, PHOTO-LITHOGRAPHER. WASHXNGTON. D C.

(Model.)

Y 1 3 Sheets-Sheet 2 J; M. CASE.

T'loury Bolt..

,Patented May 3,18 8l.v y

3. t. e nu h s s t nv e h S Qu H L 1 S0 AB C u... ...u M0 1 Jhr q. d 0 m No. 240.964. Patented IVIay 3,1881.

www QM liz NTTE STATES PATENT OEEIcE.

JOHN M. CASE, OF COLUMBUS, OHIO, ASSIGNOR TO CASE MANUFACTURING COMPANY, oF

FLOUR- SAME PLACE.

BOLT.

SPECIFICATION forming part of Letters Patent No. 240,964, dated May 3, 1881.

Application filed October 20, 1880.

To all whom it may concern:

Be it known that I, JOHN M. CASE, a citizen ot the United States, residing at Columbus, in the county ot' Franklin and State of Ohio, I

have invented Imlnovements in Flour-Bolts,

of which the following is a specification.

The subject of my invention is an apparatus consisting of an inclined box, or a number of such boxes in a vertical series, one over another,

1o each being preferably mounted at its delivery end on a drivin g-shat't, and supported adjustably at the other end so as to be variable in its angle of inclination. Each box contains a screen and an endless elevatordriven by a positive movement, by which the material passing through the screen is repeatedly raised and dropped upon its upper end for rescreening, a series of guides being arranged at the upper end of the screen, adjustable at any angle, in

zo such a manner as to deflect the material as it is dropped on the upper end ofthe screen, more or less, from the receiving toward the discharging side ofthe screen, so as to accelerate or retard its passage through the machine, as hereinafter described. The endless elevatorcarrics a brush for sweeping the upper surface of the screen. rlhe screen has a slight vibratory motion, and has beneath it a series of parallel wires carried by the screen in its vibrations, and serv- 3o ing to impart an additional vertical vibration to the cloth by their own tremulous motion, the said wires being mounted in a frame which has a very slow reciprocating movement parallel with and independentlyot' the screen, said 3 5 movement extending as far as the distance between the wires, so that all parts of the surface of the screen will be subjected to the vibrating action of the wires. The material passing through the screen is delivered into a 4o trough provided with an adjustable cut-ofi', with conveyers above and below, so that any desired proportion of the product may be discharged for use, and the remainder carried back as returns for retreatment.

In order that my invention may be fully understood, I will proceed to describe it with reference to the accompanying drawings, in which- Figure lisa side elevation, partly in section, 5o illustrating the invention embodied in a verti- (Model.)

cal series of three boxes, the upper box and its accessories being shown entirely in section, the middle box one-halt in section, and the lower box in elevation. Fig. 2 is a plan view with the cover ofthe box omitted. Fig. 3 is an end 55 view, the top ofthe box beingl sectional vertically on the line 3 3, Fig. 1. Fig. et is a transverse section ot' one ot' the boxes on the line 4 4, Fig. l.

A A A represent different parts of the sta- 6o tionary frame.

B B B are inclined boxes, supported at one end on driving-shafts C, having their bearings in brackets D, and supported adj ustably at the other end by brackets E,projectingrigidlyfrom the frame A, and screw-clamps F, txed to the side ofthe box and sliding on the said brackets E, as illustrated in Fig. l. Tithin each box is a screen, G, fitted to slide, and having a slight vibratoryinot-ion imparted to it by means 7o of a cam or tappet-wheel, H, or any other customary means.

I I represent a series of wires mounted in a frame, l', which is carried by the screen, and receiving a gradual reciprocating movement by 7 5 means of a screw, the said movement extending to about the distance betweenl the wires -I so that they will be brought under all parts of the screen in succession, as described in my pending application for improvement in mid- 8o dlings-puriiiers. The motion ofthe screen upon these wires keeps the material on the screen constantly in motion, and prevents the clogging ot' the same on either the upper or lower side of the screen.

The endless elevator consists of an apron, K, attached to bars L, which are carried by endless chains M, driven by sprocket-wheels N on a shaft, O, at the lower end of the box, the said chains being stretched around similar 9o sprocket-wheels, P, 011 an idle-shaft, P', at the upper end. One or more brushes, Z, are attached to the outer side of the elevator for the purposeofsweepingthescreen. Thesebrushes may be made of leather thongs, rope, bristles, 95 or any material preferred. My preference is to make them ot' small cords adapted to fall freely upon and be drawn over the surface of the screen.

Q Q represent con veyers, placed respectivei 0o ly above and below a eut-oi chute, It, upon which the screened material is delivered from the screen-board S.

R represents a cut-off valve adjustable longitudinally ot' the conveyers, so as to cause a greater or less quantity of the screened material at the tail end of the box to be dropped into the lower conveyer, Q, in order to be carried back with the returns.

The conveyer Q and the driving-shaft 0 of the sprocket-wheels N are driven, respectively, by pinions T2 T3, connected by means of an idlewheel, T, and pinion T2, meshing with a pinion, T, on the driving-shaft C. The tappet or cam Wheel H, as shown, is carried by the shat't of the upper conveyer, Q 5 but these details are not important to the invention.

U U represent customary sprin g-han gers, by which the screen G is supported and permitted to vibrate.

V represents the t'eedinghopper; \V, the tailings-spout; X, the delivery-spout for the finished material, and Y the returns-spout, which is shown in the present illustration conducting the material, which, passing through the side of the screen most remote from the feedinghopper V, is delivered to the lower conductor, Q', into the next box below for rebolting. If preferred, these returns may be carried back again to the iirst hopper for rescreening or to the stones for regrinding, and the fine product passing through the first side ot' the screen may be taken into the feedinghopper of the next bolt, ifit be desired to rebolt the flour. My invention is applicable under either mode ot' treatment.

G' G are guides or detlectors pivoted at the upper end of the screen Gr, and adjustable at any angle by means of a connecting-rod, g, so that the said guides may be turned at any angle desired, in order to deflect the material toward the discharging side ot' the box, tc a greater or less extent.

In operation the material received through the feeding-hopper V is carried up by the elevator K L and dropped on the upper end of the inclined screen G. lt descends over the surface of the said screen in customary manner, the finished portions passing through the meshes, and that which reaches the bottom without passing through is taken by the elevator and carried successively to the upper end. The deccting-guides G serve to gradually convey the material at each successive elevation to a greater or less distance from the receivin g toward the delivery side of the screen,

so that by the adjustment of the said deflectv ing-guides it may be caused to be elevated and passed over the screen any desirable number ot' times before it will reach the side ot' the screen most remote from the feed, and such as cannot pass through will be discharged as tailings through the spout WV.

By making a small modification of my bolt as herein described, it may be used as a purifier for cleaning middlin gs, or as a combined bolt and purifier. This modification consists in forming an angular space between the screen G and elevator K L, by widening out the elevated end of the machine and throwing the elevator upon a greater angle than the screen. Into this angular cavity there may be a suction of air applied by the construction of suitable fans having connection with the air-chambers above the screens. The object in pivoting the bolts so as to permit a greater or less angle of inclination is to increase or retard the motion of the material upon the screen butI do not contine myself to pivoting the succes sive bolts and building each independent, as herein described, as they may be made permanent and the series of bolts all combined in one vertical bolting-chest.

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

The combination of trunk or box B, the sprocket-wheels N P, endless apron K, provided with bars L, chains M, and a screen, G, as set forth.

2. The combination, with the elevator-trunk, screen, and sprocket-wheels, of the endless apron K, provided with bars L and cleaningbrush Z, as set forth.

3. A bolting apparatus consisting of a vertical series of inclined boxes containing elevators and screens, and provided with conduct ing spouts or hoppers, to pass the materia-l from one to another of the successive boxes ot' the series, as explained.

4. The box or trunk B, containing the elevator and screen, said box being hinged at its lower end and adjustable at its upper end, as set forth.

5. The combination ot' the box or trunk B, hinged at its lower end, and containing clevator and screen, brackets E, supporting its upper end, and screw-cla1nps F, for adjusting the said trunk, as set forth.

6. In combination with the apron K and screen Gr, the pivoted deectors or guides G G', arranged at head of the said screen, as set forth.

7. The tappet or notched push-wheel H, adapted to slide the screen endwisc, as herein described, for the purpose set forth.

JQHN M. CASE.

\Vitnesses:

OTWAY WA'rsoN, HARRY E. KNIGHT.

ICO

IOS

Images