US173634A - Improvement in millstone-dressing machines - Google Patents

Description

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. ALHOPPIN.

- MILLSTON'E DRESSING MACHINE. N'O.173, 634. Patented Feb.15,187 6.

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N.FETERS, PHG'IQLITHOGRAFHER, WASHINGTON. D. C.

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' MILLSTONE Dans MACHINE. .No. 173,634. Patented Feb. 15,, 187 6. -i

UNITED, STATES ALBERT HOPPIN, or LA OROSSE, WISCONSIN, ASSIGNOR TOHIMSELF AND PATEN QFFICE.

AMAS A K. OSTRANDER, OF SAME PLACE.

IMPROVEMENT IN MILLST ONE-D RESSING MACHINES.

Specification forming part of Letters Patent No. 173.634., dated February 15, 1876 application filed January 12, 1876.

To all whom it may concern: Be it known that I, ALBERT HOPPIN, of

the city and county of La Grosse and State of Wisconsin, have invented a new and Improved Millstone-Dressing Machine; and'I do hereby declare that the following is a full, clear, and exact description of the same.

. The use of emery-Wheels for dressing mill- .tails shown in section; Fig. 2, a detail sectiona1 view on line 2 2, Fig. 3; Fig. 3, a top-plan view of the entire'machine. Figs. 4 and 5 are detail sectional views on lines :10 my y, respectively, of Fig. 3. Figs. 6 and 7 are detail sectional views. I

e A represents a tubular post, hayin g a horizontal slotted'ba'se-flangaa, and adapted to be set over the eye of the bedstone,-and encircle the spindle thereof. It is provided with hinged plates at, on which set-screws a are arranged to bear, as shown, for the purpose of leveling the post on the stone.' Atubular head, B, is fitted on said post, and from it radiates the draft-Way'O, Fig. 3, to which the chief operating parts of the machine are attached, as hereinafter described. The head B turns freely on post A, but may be secured in any desired position by means of a clampscrew, 1). The upper portion of the head forms a bearing for the upright shaft D and the horizontal shaft E, from which latter the emerywheel derives motion. The transmission of rotary motion from shaft D to shaft E is by ordinary bevel-gears, d 6, Fig. 1; but in order to allow the former to be adjusted higher or lower, the gear d has a spline-connection therewith. This adjustment is necessary, owing to spindles. 'ical recess, f, which adapts it to fit and center itself upon the cock-head C, Fig. 6. The

the difl'erence in the height of different mill- The lower endof shaft D has a con-f shaftD is locked to the mill-spindle by a sleeve.

clutch, H, Fig. 7, so that both will rotate together. ported by a foot, and the shaft E by a stand- The outer end of the way O is supard or bracket, which rises vertically from said way. A head-block, I, Fig.3, is attached to and slides on the way 0, and is provided with suitable bearings or ways. for the .par-

allel steel bars K, to the outer ends of which .the emery-wheel is attached. These bars K. slide lengthwise in and through said heade, having a spline-connection therewith, and

provided with a hand-'wh'eel,m,01 1 its outer end. The rod is therefore adapted to slidev through thepinion, which is fixed in the headblock I, and therefore moves bodily with it,

although arranged for being rotated independently; The shaft of'emery-wheel L is mounted iu'a long tubular bearing, M, which is arranged beneath and transversely of the bars K, and connected by hinged arms n to a frame, j M, which slides longitudinally on said bars,

and is supported thereon by friction-rollers, 0. Said wheel is supported or held up otf the face of the stone by means of a spring, 19, which bears against the under side of arms n, Figs. 4 and 5. r p

The tension of the spring can be regulated at will by a screw-nut, g, which is applied to the free end of a rod, 4", pivoted to the arm .9

of rock-shaft, t, the spring being interposed between said arm 8 and arms a.

The means or devices for-forcing emerywheel down into contact with the stone are a rock-bar, N, which is jointed to an arm of the tubular bearing M, and a pinion, o, operated by aT-handled shaft, P, having its bearings in the frame M. This feature is oneof the most important parts of the invention, as .by itthe action of the emery-wheel is placed under the perfect control of the operator, and can be moved back and forth, and also made to cut light or heavy, as desired.

A band-wheel, R, Figs. 1 and 3, having a splinc-connection with shaft E, communicates motion through belts s and pulleys t to the shaft of the emery-wheel. Said pulleys are mounted in a jointed frame, S, arranged as,

belts, before described, to the emery-wheel. For dressing the face, a square-faced wheel I is used, and for dressing the furrows a bevelfaced wheel is used. The stone is then stafi'ed the same as in hand-dressing with the pick,

and the operator, taking hold of the handwheel and T-handle, before mentioned, brings the wheel to cut off the inequalities on the stone, shown by the staff, as much or little as may be required. He is thus enabled to finish the face and furrows of the stone to a point of excellence far beyond that heretofore attainable.

To dress the runner or upper millstone, I employ a somewhat different apparatus. The runner is removed from the bed-stone, and

placed in an inverted position near the bed;

stone, and as nearly as practicable in' the same plane with it. The hollow post A is taken out of the machine, and the iron block D and screw-shaft E, Fig. 7, inserted in its place. The screw-shaft E is then adjusted so that its point may rest in the socket of the bale F, and the machine adjusted level with the face of the inverted stone. Motion is communi cated to the upright shaft of the machine from the mill-spindle as follows: An upright shaft is connected to the mill-spindle by the same arrangement of conical hole and couplings as before described, and is supported in a perpendicular position overthc spindle by a small stand, of wood or metal. A pulley is placed upon the upper end of this shaft, and, also one upon the upper end of the upright shaft in the machine. These are connected by a belt, and the motion of the spindle is thus imparted to the upright shaft of the machine, and from thence to the emery-wheel, as before described.

The remaining part of the work is the same as on the bed-stone.

What I claim is- 1. The combination, with the post A, having the horizontalflange a, of the plates 0., pivoted at the inner end by means of hooks, and the set-screws bearing on said plates, as shown and described.

2 The upright shaft D, having a conical recess or cavity in its lower end, as shown and described,-for the purpose specified.

3. The combination of the head-block I, the

sliding bars K, emery-wheel, jointed frame S, and pulley and belt gear 8 t, as shown and described.

:4. The head-block I, rack and pinion 6 ie,

the shaft E, and bandwheel R, having a splineconnection therewith, in combination with the bars K, carrying the emery-wheel L, and the belt and pulley-gear, as shown and described.

5. The emery-wheel mounted on a vertically-adjustable spring-supported bearing, substantially as shown and described.

6. The emery-wheel mounted on arock-sh aft, M, the rack and pinion for adjusting it and controlling the pressure of the wheel upon the stone, as shown and described.

7. The spring, and its tension -regulating screw, in combination with the rock-shaft and adjustable bearing of the emery-wheel shaft, as shown and described.

8. The emery-wheel carriage, arranged to slide on the bars K, substantially as shown and described.

ALBERT HOPPIN.

Witnesses A. K. OSTRANDER, Jr., H. I. Buss.

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