USRE473E - Improvement in floufung-mills - Google Patents

Description

-. "m- J was. 4 SheeFs-Sheet I.

f) Flouring Mill.

- No. 473. Reissued June 16, 1857.

' 4- Sheets-Sheet 2.

Reissued June 16, 1857.

K 4 Sheets-Sheet 3. J. was.

L Homing Mill. 7 I

- A Reissued June 16, 1857.

. 4 Sheets- 3mm 4. WEIS.

F Iouring Mill Reissued June 16, 1857.

. being inclined in con UNITED STATES 'FATENT OFFIeE.

Specification forming .To all whom it may concern.-

Be it known that I, JOSEPH were, of Bordentown, county of Burlington and State of New Jersey, have invented certain new and nseinllmprovemeuts in Flouring-Mills; and I do hereby declare that the following is a full, clear, and exact description of the same, reference being had to the accompanying drawin gs and to the figures and letters of reference marked thereon.

M y invention re which the grain is acted upon by met ing-snrfaces, which consist in a hoop or hoops of cast-steel covering the entire surface of a tapering cast-iron burr, on the entire surface of which hoop or hoops I cut a series of teeth. in disjointed lines obliquely with the axis of the burr; This steel-covered tapering burr I cause to revolve its circumference in proxim 1 ity with the inside surface of a semicircular; tapering shield, which is allowed to slide laterally on guides secured permanently to the flames of the machine, the same guides preventing the shield from turning with the burr. On the inside of this shield are dovetailed longitudinal pieces of cast-steel with longitudinal grooves between each piece. Thedovctailed pieces are curved and tapering so as to assimilate to the circumference of the burr, and on their concave surfaces are also cut teeth oblique with the axis of the burr, but inclined in a contrary direction to those of the latter. By an adjusting screw connected to j the frames of the machine, and acting on a nut attached to the shield, the latter may be moved backward and forward on the guides in a line parallel with the axis of the burr, so I that the concave surface of the shield, with its file-cutsteel pieces,1nay-be brought in more or less proximity with the steel-faced burr. The grain is submitted to the action of tho burr and shichl combined, the teeth of which, trary directions, cross each other, and have a most powerful cutting and grinding effect on the grain. The longitudinal grooves between the dovetailed steel pieces serve the purpose of catching the grain I lates to flouring-mills in,

al grinda part of Letters Patent No. 14,179, dated Juno June 16,

i required.

aryZi, 1856; Reissue No. 473, dated ,1857.

after it passes over one set of teeth and changes its course before it is picked up by the next steel piece. The grain leaves the shield at the point where the latter terminates, and is guided so as to drop a second steel-covered tapering burr; passing between that and a. second tapering shield is discharged below, ground to the consistency The whole is so geared and ary bntlittle space compared with its efiiciency, and has the additional advantage over the ordinary burr-stones of be iagadapted to grind damp grain. On account of the peculiar construction of the teeth my mill separates the bran from. the grain more effectually, so that the flour is manufactured more purely white and free from that reddish color common to flour manufactured by the usual process.

In order to enable others skilled in the art to make and use my invention, I will now procoed to describe its construct-ion and operation.

On reference to the drawings, which form a part of this specification, Figure 1 is an end elevation showing the exterior of 11] y improved flouringanill; Fig. 2, a transverse sectional elevation of the same on the line 1 2,=Fig. 4; Fig. 3, a. longitudinal sectional elevation of the mill on the line 3 4, Fig. 2; Fig. 4, asectional plan on the line 5 6,;1-ig. 3; Fig. 5, an inside view of one of the shields.

A A are the two sidei'rames of the machine, which are connected together at the top by the entablutnre B, and toward ihe'hottoin of the cross-stays G, to each of the frames A, are secured thepcdestalsD D, which formt c bear ings fortheshaft E. 'To this is secured the circular tapering burr E, round which is tightly secured the cast-steel covering G, which may be formed of one piece or of a series of hoops with their edges in contact with each other. Having turned the steel surface of the burr,I cut thereon a series of teeth, similar to those of an ordinary coarse file, the said teeth being cut in disjointed lines obliquely with the axis of the burr.

ranged as to .occnp on the circumference of H is asemicircular tapering shield of cash iron,having flanges on each side, and notched so as to fit the guides I, which are parallel with the axis of the burr, and their ends bein g permanently secured to the inside of the opposite frames. Three or more steel pieces,

are fitted in dovetailed grooves cut longitudinally inside the taperirg shield H, so that their surfaces may assimilate to the circumferen cc of the stcel-covered burr. Between each of the steel pieces It are the longitudinal grooves i, for a purpose hereinafter referred to. The concaved surfaces of the steel pieces h have likewise file-cut teeth also obliquely with the axis of the burr, the obliquity of the teeth on the burr and of those on the steel pieces It being in contrary directions. Below the shaft E is a second shaft, J, which has also its hearings on the opposite frames of the machine. On this shaft is a tapering burr with steel covering similar to that above described, and in proximity with this is a. semicircular tapering shield, similar to that above referred to, and guided 1D. ways I in a similar manner. In order to bring the concave surfaceof the semicircular shield and that of the steel-covered burr closer to or further from each other, I attach to the inside of one of the flanges of the shield a. nut, R, for the reception of the screw L, the end of the latter being connected to the frame A, so as to swivel therein without having any lateral movement. The screws L are furnished with handlewheels M, so that on turning the screws by the same the shields may be made to slide Backward and forward on the ways I, and their file-cut steel pieces consequent] y brought nearerto or further from the file-cut surfaces of the covered burrs.

N is the driving-shaft, having also its bearings on the opposite frames A. A. This shaft is furnished with a driving-wheel O, on one side of the machine for receivin the driving strap, and has a spur-wheel, inside the frames, which, gearing into a similar wheel,

Q, on the shaft J causes the latter, and with it the steel-faced bnrr, to revolve in the direc' tion of the arrow. Ontsido'the machine the shaftJ is furnished with another spur-wheel, R, which, gearing into the wheel S on the shaft E, causes the upper burr to revolve in the directiouot' its arrow, so that on turning the pulley N the upper and lower burr have a simultaneous movement imparted to them.

Tis the hopper secured to the top of the frame, and in the lower mouth of this hopper is the roller U, on the surface of which are aseries of indentations, t. The fced=roller is attached to the shaft V, which has its hearings on the ends of the hopper, and is furnished with two or'morc different-sized pulleys, Q

round either of which may pass the strap from the pulleys Y on the shaft E, so that the strap may be passed from one set of pulleys to the other, and the speed of the feed-roller consequently altered at pleasure.

Operation of mill: The grain to be. ground being placed in the hopper, the machine is set in motion by a strap from any adjacent shaft operating on the pulley U. This causes the fcedroller U to turn in the direction of the arrow. Now, as the circumference of the feedroller is in close proximity to the lower edge of the hopper, the grain can escape by no other means than by entering the identations of the said roller,which carries certain quantities past the edge of the hopper in the direction of the arrow, and allows limited and regular quantities of grain to drop onto the circumference of the tapered steel-covered roller F at the point where the upper portion of the semicircular shield H terminates. The grain is now carried between the shield and the burr, and is acted upon by the oblique teeth on the pieces 1:. and those on the steel covering of the burr, and as these teeth slant in contrary directions the cutting effect on the grain will be most powerful. And this efiiciency is increased by the longitudinal .grooves i, which, as the burr revolves, catch the grain and turn its direction between each of the pieces h. The grain thus partially ground, on leaving the point where the lower portion of the upper shield terminates, drops down a slide, 1, onto the circumference of the lower burr, where it is again acted upon by the teeth on that burr and those on its shield, and being still further ground thereby is discharged below into any convenient recep taclc. Wbenit becomes necessary to grind the grain finer or coarser, by turning the screws L the shields maybe brought in closer proximity with or farther from the burr and the desired efiect thereby accomplished.

In order to prevent the grain from ll yin g, I cover the burrs with guards of sheet-iron or other suitable material.

The whole mill does not occupy a space niore than forty inches in height and twentyeight inches in width, the cylinder being fourteen inches long and twelve inches in diameter at their largest ends, so that tho-whole may be readily moved about from place to place.

This mill, in addition to its diminutive size, has considerable advantage over the common burr-stones on account of the rapidity of friction in the former, while in thelatter the grain has to pass around the stone in a serpentine direction.

When the teeth become worn by continual use, the steel pieces in the shield, as well as the steel coveri'ag of tho burr,-.may be recnt with facility.

I do not desireto confine myself to any particular number of shields and burrs, as in some cases one burr and one shield only may be found suflicient; in other cases two of each, and occasionally mor may be required.

Having now fully tcscribed my improved flouring-lnill, what I ciaim, and desire to secore by Letters Patent, is-

The tapering burr F when covered with steel plates G, having teeth in disjointed lines and oblique with the axis of the burr, in combination with the steel piecesk,having also oblique In testimony whereof I have signed my teeth, but inclined in a contrary direction to name to this specification this 7 th day of July, those of the burr, and being dovetailed into 1856. 4 projections enstto theshield H,the said projec- JOSEPH W'EIS.

jeetions forming Ion gitndinal grooves i, rnnning lengthwise on the cone and crossing the in- In presence off-lined dress','snbsta.ntially in the manner and JOHN J. MAXWELL, for the purposes set forth. F. B. GORDON.

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