US11045A - peters - Google Patents

Description

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Grinding Mill. N0. n,045. Patented June 6,1854.

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Grinding Mill.

Patented June 6, I854.

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Patented Jung 6 1854.

1 UNITED STATES PATENT OFFICE.

J OjHN o. REED, oEMoUNT VERNON, OHIO, ASSIGNOR T 0. r. BUCKINGHAMLH. vr. UPToN, AND J. o. REED.

GRINDING-MILL.

Specification of Letters Patent No. 11,045, dated June 6, 1854.

exact description, reference being had to the accompanying drawings, which form part of this specification, and in which Figure 1 represents a view in perspective of a mill comprisingmy improvements, a, port-ion of thecurb surrounding the stones being removed in order to show the parts more fully; Fig. 2, a vertical transverse section of the same at the line as, w, in Fig. 1; Fig. 3, a view in perspective of the cup of the bed stone, detached; Fig. 4:, a similar view of the same turned bottom uppermost; and Fig. 5, a view in perspective of the mill when opened so as to invert the runner and its frame, for the purpose of rendering the faces of both stones accessible for dressing or cleaning.

The accompanying drawings represent the frame of the mill made in two parts (A and B) hinged or jointed together on one side at (a) and clasped or otherwise secured so as to allow it to open on the other side. The top part of the frame which shuts like a lid upon the lower part (B) carries the upper stone or runner, the feed spout, driving gear, and hopper, with their appendages; while the lower bed or still stone is supported in the lower part (B) of the frame. The stones (C and D) are incased and supported in metallic cups or holders (E and F) of a less depth than that of the stones so that the grinding faces of the latter may project beyond the edges of the former.

The cups are made sufficiently strong and heavy to support the stones. The central portion of the upper cup is occupied by a tube (6) cast in one piece with the cup, into which the lower end of the hanging spindle (G) (by which the cup is suspended and rotated) is fitted and keyed, so as to unite the two firmly. Into this hang ing hollow spindle is fitted a tube (H) which also extends into the tubular extension (0) of the metallic cup, and through which the grain is fed from the hopper to the grinding surfaces of the stones. This tube H does not rotate with the spindle but fits loosely therein, and rests by a flange (i) on the top or arch (A) of the frame.

The

which are secured in position by cement or otherwise, in such manner that they will be firmly held in place, and at the same time admit of easy removal when worn to be replaced by new ones. The spindle ,(G) carries a pulley (I) by which it is driven by a beltthat receives motion from any convenient prime mover. more tappets (J) projecting just beneath its upper bearing, which as they rotate strike a lever, that jars or shakes the shoe to discharge the grain from the hopper, in the usual manner to feed the stones.

The lower stone (D), with its on (F), in their general construct-ion resem le the upper stone (C), and cup (E), but the central tube (6) in the lower cup is closed at the upper end with a thick cap, the underside of which forms a bearing 0) on which the cup hangs on the point of a pivot This bearing is concentric with the periphcry of the cup and above its center of gravity, that it may hang more stably. In order that the grinding surface of the lower stone may be kept parallel with that of the upper stone a series of weights are fitted to the bottom of the lower cup in radial ways (n), by moving one of these weights toward the circumference of the cup, it increases the preponderance of weight on that part of the stone and tends to lower that side, which will be raised again by returning the weighttoward the center. When the weights are adjusted they are held by set screws. The lower cup is prevented from rotating by two pins or trunnions (s) which project from opposite sides and enter vertical slots (7') in the lower part B, of the frame, but which permit the cup to rock freely for the purpose of adjusting the level of the face of the stone, and also allow the stone to be raised and lowered.

The pivot (c) which supports the lower stone is carried by a bridgetree (K) secured by a hinge (Z) atone end to the lower part (B) of the frame, and at the other end suspended from the upper part (A) of the frame by a rod fitted with a lever-nut at its It also has one or upper end, by turning which the bridgeedge upon an annular flange (f) on the cup of the lower stone, which flange forms a trough for meal to pass along to the spout (N) through which it is discharged.

In turning the upper stone over for the purpose of allowing free access to the faces of both stones, the first step is to withdraw the upper end of the rod (L) from its connection with the upper part (A) of the frame, and lower the bridgetree (K) to let the lower cup hang by'its trunnions or pins (8) on the bottom of the slots (1") in the lower part (B) of the frame. with its frame is next removed from the upper part (A) of the frame, which may then be turned over as represented in Fig. If feet were attached to the upper part of the frame so as to project above the hopper, there would then be no occasion for the removal of the latter, when the upper stone is turned over. In that case the feet of the lower part of the frame would require to be lengthened proportionally to the increased height at which the feet would cause the The hopper upper stone to stand, to bring both stones to the same level. When the stones are thus opened out the runner, which is the most difficult to dress truly and smoothly can be turned on its spindle (G) as if chucked in a lathe, and thus the chief difliculty in-the way of dressing such a stone is avoided.

What I claim as my invention and desire to secure by Letters Patent is: 1. The hollow spindle in combination with the metallic cup, through which the grain to be ground is fed, substantially as specified.

2. The method of balancingand adjusting I the bed stone by means of adjustable weights, arranged and operating substantially as specified.

In testimony whereof, I have hereunto subscribed my name.

v 7 JOHN G. REED. Witnesses J QNATHAN J. STONE, O. B. CHAPMAN.

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