US20370A - rands - Google Patents

Description

C RANDEZ.

Flour Mill.

NO. 20,370. Patented May 25, 1858.

-UNITED STATES PATENT OFFICE.

o. BANDS, or PEORIA, ILLINOIS.

FLOURING-MILL.

Specification of Letters Patent No. 20,370, dated May 25, 1858.

To all whom it may concern:

Be it known that I, CHRISTOPHER BANDS, of Peoria, in the county of Peoria and State of Illinois, have invented a new and useful Improvement 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 accompanylng drawings, forming a part of this spec1fication, in which- Figure 1, is a vertical, longitudinal section of a mill constructed with my improvements. Fig. 2, is an inverted plan of the upper stone. Fig. 3, is an inverted plan of the lower stone.

Similar letters of reference in each of the several figures indicate corresponding parts.

My invention embraces, 1st, the arrangement for avoiding the heating and deterioration of the flour and cutting up of the bran during the process of grinding, consisting of the upper and lower stones which are reduced from their center outward to mere rim grinding surfaces comparatively. Two annular non-grinding plates, one or both concave, placed over the enlarged eye of the stones, and a horizontally revolving fan or blower arranged intermediately between the stones and crossing vertically, the space existing between the same, as and for the purposes hereinafter set forth.

My invention embraces, 2nd, in combination with the above the arrangement for suspending the stones consisting of two rings, each having four axes, and one belng arranged on the spindle of the stones and the other between standards of the frame, as and for the purposes hereinafter set forth.

My invention embraces, 3rd, the arrangement for feeding the grain into the eye of the stones in such quantities and with such a speed as will be commensurate with the rapidity of the discharge at the perlphery of the stones, said arrangement consistlng of a sliding and revolving spirally fianched cylinder carrying a vertically revolving friction wheel which rests upon and slides over another horizontally revolving friction wheel driven by bands leading from the spindle of the lower stone.

By the first feature of my invention, the

central or slow speed surface, which usually impedes the operation of the grinding and greatly deteriorates the quality of the flour, is almost wholly dispensed with and the grinding surfaces are reduced to a periphery or rim, which economizes bur surface and effects a great saving in dressing. The feeding room is enlarged and the grain better distributed and supplied to the outer or most effective grinding surface, and owing to a direct blast being generated across or between the surfaces the discharge through the stones is accomplished with such quickness that the flour is delivered cool and without cutting up of the bran or deterioration of its quality. By the second feature of my invention the stones or grinding surfaces adjust themselves so as to operate with an equal and uniform action at all points, and by the third feature of my invention the feed can be supplied very regularly and with such speed and in such quantities as the character of the wheat shall demand in order to effect a successful and perfect grinding of the same.

To enable others, skilled in the art, to make and use my invention, I will proceed to describe its construction and operation.

A, represents the frame in which all the parts are arranged.

B, is the central driving spindle furnished with suitable pulleys a, b, for the purpose presently described.

C, C, are the stones or grinding surfaces. The lower one is suspended on the spindle by means of the ring D, which is arranged within the eye of said stone, being supported by four short journals 0, 0, (1, (Z, the journals 0, 0, being simply for thestone to turn or vibrate upon and those (Z, (Z, for the stone and ring together to turn or vibrate upon. The upper stone is similarly hung on four short journals 6, c, f, f, with the exception of not being attached to the spindle, two of the journals being fixed in uprights g, g, of the frame and the other two in the periphery of the upper stone as shown. By thus suspending the upper and lower stones both have a chance to give in all directions to any inequalities in the distribution of the grain between their grinding surfaces, and thus the grinding action throughout is uniform and perfect. It is also found from practice that by having the lower stone to revolve a superior centrifugal force is obtained and therefore it is essential thus to suspend the upper stone in order to run the lower stone to advantage. The upper and lower stones are reduced from their center toward their periphery so as to have greatly enlarged eyes, E, E, and to present mere rim grinddistance, in the direction of the arrow, that ing surfaces, comparatively, as shown. By thus constructing the stones most of the central slow speed surface is dispensed with and the grain is consequently discharged more quickly and in a. cool state.

F, F, are two annular plates for cover1ng the enlarged eye of the stones. One or both of these plates should be concave and attached fast to the stones by being countersunk into the same so as to stand flush with the two surfaces as shown. The upper plate has an annular space it, existing between itself and the spindle so as to allow for the introduction of the grain to the surfaces and the supply of air to the fan or blower arranged between them, as presently described. G, is the horizontally revolving fan or blower arranged between the plates F, F, and attached fast to the spindle B, as shown. The blades of this fan cross the space existing between the approximating or grinding surfaces of the two stones, and in their revolution they force the grain by direct action or contact out to the grinding surfaces, and then by a direct blast generated by themselves facilitate the escape of the flour at the periphery of the stones to such an ex tent as to insure the delivery of the same in a cool state.

H, I, is the feeding hopper. Within the cylindrical portion thereof a spirally flanch ed revolving and sliding cylinder K, is arranged. This cylinder serves for discharging the grain supplied from the hopper gradually and regularly through the spout L, into the eye of the stones.

M, N, are friction wheels for regulating the speed of the cylinder K. The wheel M, is arranged on an extension rod 2', of the cylinder K, and N, on a vertical shaft 0, said shaft being driven by bands j, 7?, leading from the pulleys a, Z), of the spindle B, as shown.

P, is a clutch lever combined with the cylinder K by means of an extension rod Z, of the cylinder as shown. By this arrangement of feeding device it will be evident that if the spirally flanched cylinder feeds too fast that by sliding it through the clutch a short it can be made to feed slower, for by thus sliding it the friction wheel M, is caused to occupy a place nearer the center of the friction wheel N, and consequently has a slower speed imparted to it, and again if the feed is too slow by shifting the spirally flanched cylinder in an opposite direction to that indicated by the arrow the supply will be increased because the friction wheel M, will be driven from a point farther from the center of the wheel N.

Vhat I claim as my invention and desire to secure by Letters Patent, is

1. The combined arrangement of the upper and lower stones C, C, reduced from their center outward to mere rim grinding surfaces comparatively, two annular nongrinding plates F, F, one or both concave placed over the enlarged eye of the stones,

and the horizontally revolving fan or blower Gr, arranged intermediate between the stones, and crossing vertically the space existing between the same so as to force the grain with a direct action out to the grinding surface and to give a direct blast, substantially as and for the purposes set forth.

2. I claim the fan when constructed with its blades radial, and situated in the specified relation to the space existing between the stones, so as to give a direct blast, and for the purposes set forth.

3. In combination with the above, the arrangement for suspending the stones C, C, consisting of rings D, each having four axes 0, 0, cl, cl, or e, e, 7, f, and one being arranged on the spindle of the stones, and the other between the standards of the frame, substantially as and for the purposes set forth.

4. The combination of the spirally fianched revolving and sliding cylinder K, friction wheels M, N, and spindle B, substantially as and for the purposes set forth.

The above specification of my improvement in flour mills signed by me this twentyfirst day of April 1857. I

CHRISTOPHER BANDS.

Witnesses r G. YORKE-ATLEE, JAMES TAYLOR.

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