US224085A - Millstone-dressing machines - Google Patents

Description

2 Sheets-Sh eet 1.

D. S. GREENWALD. Millstone-Dressing Machine;

No. 224,085. v Patented Feb. 3, 1880.

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N. PETERS. PHOTOMTMOGRAPMER, WASHINGTON. D. c.

2 Sheets-Sheet 2 D. s. GREENWALD. Millstone-Dressing Machine.

I IIIIIIIIIIIIIIIIHHII No. g24,0s5. Patented Feb 3, I880.

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7 NITED MSTATES DANIELS.IGREENWALD, or WARREN, onto.

MILL STONE-DRE S SING MACHINES.

SPECIFICATION formingpartof Letters Patent No. 224,085, dated February 3, 1880.. Application filedJnne 3,1879. i i

To all whomit may concern: I

Be it known that I, DANIEL S. GREENWALD, of Warren, in the county of Trumbull and State of Ohio, have invented certain new and useful Improvements in Millstone-Dressing Machines; and I do hereby declare thefollowing to be afull, clear, and exact description of the invention, such as Will enable others skilled in the art to which it pertains to make and use it, reference being had tothe accompanying drawings, which form part of this specification. l y I t y My invention relates toauimproved apparatus for dressing millstones and it consists, first, in afranie for supporting the dresser,

the said frame consisting of three or more radial arms hinged to a central block, said arms adapted to rest upon the floor, and their points of support maybe adjustable up or down for the purpose of leveling the apparatus ;second,'

in combining with the said arms and their supports a circular chase or ring, around which the dressing apparatus and its rear support may travel; third, in a segmental sweep for y, supporting the rear end of the dressing appa- .ratus so that it may be adjusted to cut tangentially to any circle on the face of the stone fourth, insupporting-arms hinged at the cen- .ter, or between the center and the periphery,

in order that any one of them may be swung to one side to permit the dresser to operate in that localitywithout disturbing the other parts of the apparatus; also, in mechanism for levelin g the apparatus andfor giving to the tool any desired adjustment, so asto cut from the bottom of a throat out gradually to the surface of the land, and in other minor features. In the drawings, Figure l is a plan view of an apparatus embodying my invention. Fig. 2 is a side elevation of the same. Fig.3 is a separate view of the dressing mechanism.

A suitable frame for supporting. the dresser.

is shown. This frame is composed ot'three or more arms, A, though preferably four are employed, extendingradiall y from-the center-0f the I apparatus.

1 A is a central block,to which the arms are hinged at a. At the end of thearms are uprights B, which are adj ustably connected with the arms, so as to admit of vertically adjustingthe said arms in order to suit the appathe upright and its corresponding arm A to be turned about the hinge a without disturbing the other parts of the mechanism, thus permitting the dressing-tool to be operated in the position occupied by the uprightwithout readjusting the machin t Dis a circular ring or flange supported by the uprights, so as to be embraced by them and suspended over the edge of the stone. This circular ring or flange serves as a chase, upon which the outer end of the dresser is suspended and adjusted to any position upon the periphery.

E is a segmental support. Being the seg ment of a circle, it serves as a sweep, along which the inner end of the dresser may be adjusted. This segmental frame, at itsextremities, rests against and slides upon the chasering 1),.aud at its center is pivoted to the lower end of the adjustable pivot F. This pivot F, I prefer to formic the nature of a screw, so as ,to admit of a nice vertical ad justment. y t v J am-nuts f,or other equivalent devices, may be employed for setting the parts snugly when once in proper position.

The dresser consists of a frameor bed-plate, G, having its rear end supported on the chase E by means of a set-screw and nut or other suitable pivot, g. At its other end it is pivoted to a hinged block, G, which, in turn, is

hingedto the sliding head or guide block G,

as shown. The pivot g, at the outer end, is made adjustable up-and down in a suitable slot, 9?; p h 1 I t The pivot g is in the nature ot a set-screw, in order that when the apparatus is properly adjusted the parts may be set rigidly in their places. I

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The other parts of the dresser are of the usual form, H being the tool or diamond, adjustably connected with a sliding support, H, which support slides between guides H as it is driven back and forth by the arm H At each travel of the tool a pawl, h, sets into the ratchet h on the shaft 71/ which is screw-tapped through the tool-support, so as to feed the tool laterally, in the usual manner.

The operation of this device is as follows: When it is desired to dress a millstone, the frame A is placed over the surface to be dressed, with its supports B resting upon the floor; the flanges at the bottom of the posts are placed in the grooves in the cleats C. Now all that remains to be done is to level the apparatus and adjust it to the surface of the stone. To do this, if the stone is not already level, it should be leveled. The position of the cleats C has already centered the apparatus over the stone, though, if not accurately centered, this should be done. The arms A are then leveled by suitably adjusting their ends in the uprights B, and when suitably adjusted the chase-ring D will be level. The segmental sweep E may then be leveled by the central set-screw or pivot F. Being now suitably adjusted, the tool may be brought down in its proper position uponthe stone. Suppose, for instance, it is to dress a radial groove thethroat of which shall be deeper near the eye and shallow near the periphery of the stone. The proper radial inclination maybe given by means of the setscrew g and slot 9 whereby the outer end of the bed-plate Gr may be slightly elevated. If at the same time it is desired to out the throat so that it shall be deep and abrupt at one edge and gradually come out to the surface of the lands at the other edge, an that is necessary to do is to loosen the set-screws g and 9, then rotate the bed-plate slightly around these set-screws as pivots until the proper lateral inclination is given. The apparatus is then ready for work, and the tool may he acts uated either by hand, the operator taking hold of the handle H or this handle may be suitably connected with machinery for reciprocating the tool back and forth.

When it is desired to dress a land, the bedplate should be set square as respects its lateral adjustment and be given a radial inclination corresponding with the inclination of the surface of the stone.

It is frequently desirable to dress the stone deeper in the vicinity of the eye. To effect this it is only necessary to loosen the setscrew 9 and adjust it sufficiently high to conform to the desired surface. This adjustment may, if desired, also be partially effected by lowering the center of the sweep E by running down the center pivot F.

If at any time the operation of the tool is impeded by one of the uprights B, this particular upright may be swung around its hinge to until out of the way of the tool, and

this may be effected without disturbing the other parts of the machinery and without requiring readjustment of the parts, and in this respect my machinery has decided advantages over other forms of apparatus for dressing millstones. Moreover, as my sweep E is connected with the chase-ring D, it is apparent that with one adjustment of the frame the dresser may be. caused to work upon every part of the stone, being free to sweep through a complete circumference beneath the frame.

Another advantage of my apparatus is its portability, for it is apparent that by swinging the arms together they may be packed into a compact form, the uprights may be readily removed, and when the arms are swung apart the chase-ring may be taken out and the seg--" mental sweep and dresser be all separated from the other parts. This is very advantageous, inasmuch as it enables theapparatus to be readily conveyed to any position within a mill and quickly put together over any stone.

Instead of using the cleats O, the apparatus may be provided with sharpened spuds O, which may set into the floor, and these spuds may be made adjustable up or down soas not to interfere with the swinging aside of any arm when it is desired to do so.

The apparatus may be made of wood or metal, though for purposes of portability I prefer that the frame-work shall be of wood, the chase-ring and sweep beingmade of metal.

The dresser-tool or diamond may be made single or in gangs, or the diamonds may be placed in the periphery of a suitable wheel, as shown, which wheel may be so adjusted by a suitable pin that but one diamond shall be brought into operation at a time, but admitting of quick adjustment by readjusting the pin so as to-brin g any other diamond into play. In mills where an apparatus of this character is employed the cleats 0 may be permanently attached to the floor, so that whenever it is desired to dress a millstone they will he already in proper position to receive the frame.

It is apparent that the adjusting-screw F should be exactly central of the chase-rin g D. This may be effected in any suitable manner; but I find it convenient to supply upper and lower centering-p1ates,F, which, when the central opening is accurately adjusted, maybe fastened rigidly in place.

I am aware that it is not new to combine in an apparatus for dressing millstones a pivotal sweep with a chase -ring and a bed plate adapted to have both radial and lateral inclithree or more radial arms supported upon the floor by adjusting-supports B, the said arms adapted to be turned independently about the center, substantiallyas and for the purposes described.

3. In an apparatus for dressing millstones,

a frame composed of three or more radial arms,

5. The dressing-tool consisting of a starformed Wheel provided With diamonds at its 20 points, said wheel being supported upon a pivot, about which it may be turned and set to bring any one of its diamonds into use, substantially as and for the purposes described.

6. In combination with an adjusting-pivot, 2 5

F, the centering-plates F, substantially as and for the purposes described.

In testimony whereof I have signed my name to this specification in the presence of two subscribing Witnesses.

DANIEL S. GREENWALD.

Witnesses JNo. CROWELL, Jr., W. E. DONNELLY.

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