US289323A - Grinding and polishing machine - Google Patents

Description

(No Model.)

A A E. R. WARE.

GRINDING AND POLISHING MACHINE.

No. 289,323: Patented Nov. 27, 1883.

WITNESSES: INVBNTOR offifwfwf e MEM e ATTORNEYS N, Pzrsss mwunmmpm. wnhmgm n, c.

` EDMUND R. WARE, OF WORCESTER, MASSACHUSETTS.

GRINDINGAND POLISHING MACHINE.

SPECIFICATION forming part of Letters Patent No. 289,323, dated November 27, 1883, Application led March 21, 1883. (No model.)

T0 all whom t may concern Be it known that I, EDMUND R. WARE, .a

citizen of the United States, residing at Wor cester, in the county of Worcester and State of Massachusetts, have invented 4certain new and useful Improvements in Grinding and Pol ishing-Machines, of `which the following is a specification, reference being had therein to the accompanying drawings.

Figure l is a perspective view of a machine embodying my invention. Fig. 2 is a top or plan View of the chuck employed for holding and presenting the article to be ground or polished, together with the ways upon which the chuck moves. Fig. 3 is an elevation, partly in section, taken on line x zr, Fig. 2.

Referring to the drawings, A A represents the frame -work, which supports the operative parts of the machine, and B is a bedplate provided in Fig. l with a lateral extension, B', the extension having upon its upper face ways or grooves adapted to be traversed by the baseplate of the chuck, to be hereinafter described.

C C are vertical posts arranged uponthe opposite sides of the machine, and about midway between the corner lugs or posts of the frame.

D D E E e constitute a frame mounted to slide vertically upon the posts C C when actuated by certain devices, to be hereinafter described. By preference, I bolt a rabbeted or flanged rib, D, to each of the opposite posts C, the ribs being of suitable form in crosssection to" provide grooves between their inner edges and the posts for the reception of the vertical sidebars of the frame.

F is an emeryfwheel shaft mounted in bcar ings a b rl, which project horizontally from the sliding frame, the shaft being stepped upon and adjusted by a set-screw, f, in the lower end of the lower bearings, a. i

G is an emeryp-wheel or other suitable polishing or grinding wheel mounted upon and carried by the upper end of shaft F, to which a rapid rotary motion is given by means of a belt connecting a beltepulley, g, on the shait with any suitable motor. The pulley g is splined to shaft F, and hasa downwardly-projecting neck or sleeve, which is seated in the innerend of abracket or supportingarm, D',

which is attached to one of the posts C. In

practice, I usually prefer to make the bracket v and bearing in two parts, bolted together, as indicated in the drawings.

lH is a driving-shaft mounted in bearings c c, which project from the posts C, the shaft being driven by a pulley, 71, and belt, not shown.

I is a vertical shaft mounted upon the frame A A in suitable bearings, and carrying a wormwhcel, fi, which is actuated by a worm on the driving-shaft H, but not shown.

J is. a grooved cam mounted on vertical shaft I, and secured thereto by a set-screw, (see Fig. 4,) or otherwise.

j is a stud projecting from the vertical bar e of the sliding frame, and entering the groove of the cam, the stud by preferencebeing provided with an anti-friction roller.

By means of the mechanism thus described a rapid rotary motion and also a rising-andfalling motion may be imparted to the shaft F and the emery-wheel or othergrinding or polishing wheel mounted thereon, as will be readilyunderstood from an examination of Figs. l and 4 without further explanation.

Iwill now proceed to describe various mechanisms which I have invented for properly supporting and presenting to the grindingwheel the article to be ground or polished.

Referring to Figs. l, 2, and 3, B' is an eX- tension or continuation of the upper plate, B,

of the main frame, and is provided with grooved or ribbed ways, upon or between which slides a base-plate, K.

7c is a drum or short section of acylinder provided upon its lower edge with an external beveled gear, and arranged to fit closely over a circular boss formed for its reception on the upper face of the sliding base-plate K, the drum being further secured in its position by a central stud or pivot, o, (see Fig. 3,) around which, as a center, the drum vibrates or rotates.

K' is a shaft mounted upon the lower face of the extension B', and carrying a pinion, k, which meshes with a cogged rack on the under side of the sliding plate K. y

K2 is a hand-wheel on the outer end of shaft K', by meansof which thesliding plate can be moved toward or from the grinding-wheel shaft F at the will of the operator', the rela- IOO tion of parts being such that the central pivot, o, travels toward and from said grinding-wheel shaft on a line which is radial to said shaft and to the grinding-wheel G.

O is a shaft mounted in an arm, K, which projects horizontally from the sliding baseplate K, and has a rotary motion imparted to it by a belt passing around pulley O', and thence to any desired motor, which should be placed, by preference, above the machine, and at such distance as to permit the base-plate and the appliances mounted thereon to move toward and from the grinding-wheel, as may be needed without unduly affecting the tension of the belt. O2 is va shipping-lever pivoted to the arm K3, and carrying at its short end a fork, which engages with a clutch, o2, whereby the belt-pulley may be connected to the shaft O, or disconnected therefrom, as may be required. Shaft O carries at its inner end a bevel-pinion, which meshes with the bevel-gear on the lower edge of drum 7c, (see Figs. 1 and 3,) whereby a rotary motion may be imparted to said drum and to appliances connected therewith, as follows: L is an upper plate, and L a lower plate, the latter being made fast directly to the drum k. The upper plate is connected with the lower one by a series of, studs or bolts, o o', which serve as pivots for the swinging arms N M, and also by means of an outer series of studs orbolts, a. (See Fig. l.) rlhe two parts N M of the swinging arms are connected together by tongues and grooves, preferably dovetailed, so that the parts M can slide longitudinally upon the parts N, and are secured in their position after adjustment by set-screws or other analogous devices. Each arm carries at its outer end a sharp-pointed set-screw, m. The upper plate, L, is provided near its outer edge with four circular slots, ZZ, each of which is concentric with the pivot ol of its respective swinging bar, each bar carrying also an adjusting binding-screw arranged to traverse the circular slot, whereby said arm may be securely fastened at such angle relative to the pivot o as it may be placed in, its vibration in a hori- Zonta] piane being limited only by reason of its binding-screw engaging with the walls of the plate L at the ends of its slot Z. These last-described devices constitute, therefore, a sort of chuck, which is designed more especially to receive and support irregular-shaped articles-such as, for instance, the base-plafes of stoves-which have narrow downwardlyprojecting flanges around their outer edges; and it will be readily understood that these swinging extensible arms can be readily adjusted in such manner as to receive and properly support a stove base-plate, even though the same be of very irregular outline; and it will also be seen that when thus supported such stove-plate can be advanced toward and pressed against the grinding-wheel G upon a linewhich is radial to said wheel and to its supporting-shaft F, the stove-plate meantime having imparted to it a rotary motion, and being held in contact with the grinding-wheel by means of the hand-wheel K2 and the rack and pinion operated thereby.

My machine may be operated as follows: The article to be ground-say, for instance, an irregular-shaped base-plate for a stovebeing secured upon the chuck, a slow rotary motion is imparted to said chuck and plate, both of which are advanced by means of hand-wheel K2, so as to keep the edge of the plate pressed against the rapidly-revolving grinding-wheel. When turning sharp corners, the plate should be withdrawn from contact with the wheel, to prevent improperly cutting such corners to a greater angle from the plane of the upper yface of the plate than other portions of the edge are cut.

What I claim is- 1. In a grinding and polishing machine, the combination of the following elements, namely: a grinding-wheel, a sliding carrier-frame, a' carrier rotating about an axis which is parallel with the axis ofthe grinding-wheel, mechanism mounted on the sliding carrier-frame for rotating the carrier, and mechanism adapted Vto be operated by the attendant for advancing the article being ground toward the grinding-wheel and withdrawing therefrom when turning corners, substantially as set forth.

2. In a grinding and polishing machine, the combination of the following elements, namely: a grinding-wheel, a sliding carrier-frame, a rotating carrier supported wholly fromene side upon a pivot mounted on the sliding carrier-frame and parallel with the shaft of the grinding-wheel, a 'driving-shaft mounted on the sliding carrier-frame at a right angle to the grin ding-wheel shaft, and gearing connecting the driving-shaft with the rotating carrier, substantially as set forth. A

3. In a grinding and polishing machine, the combination, with the grinding-wheel and the sliding carrier-frame, of the carrier mounted on the sliding frame and supported wholly from below, the driving-shaft and gearing for rotating the carrier, the hand-wheel mounted on the outer end of shaft K', the clutch connecting the band-wheel with the driving-shaft, and the shipping-lever mounted on the sliding frame and extending beneath the plane of the carrier to within reach of the operator at the hand-wheel, substantially as set forth.

et. In a grinding and polishing machine, the combination of a tapering grinding-wheel and a carrier wh ose axis of rotation is parallel with the shaft of the grinding-wheel, and is movable on a line which intersects the shaft of the grinding-wheel, substantially as set forth.

5. In a grinding and polishing machine, the combination of atapering grinding-wheel and a carrier which rotates in a plane at right angles to the grinding-wheel shaft, and is movable on a line intersect-ing the sh aft of the grinding-wheel.

6. In a grinding and polishing machine, the

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combination of pivoted arms and eXtensible arms attac-hed to and movable relatively to said pivoted arms, substantially as set forth.

7. In a grinding and polishing machine, the combination of a series of pivoted arms and means for securing said arms in such positions as they may be adjusted to, substantially as set forth.

8. In a grinding and polishing machine, a series of longitudinally-eXtensible arms, in combination with movable points or dogs secured to the outer ends of said arms, substantially as set forth.

9.' In a grinding and polishing machine, a mechanism for holding the article to be ground, 1 5 consisting of two substantially-parallel plates mounted upon and `adapted to rotate about a central pivot,and a series of arms pivoted between said plates, substantially as set forth.

In testimony whereof I aiiiX my signature in 2or presence of two Witnesses.

EDMUND R. WARE.

Witnesses:

H. H. DOUBLEDAY, J. S. BARKER.

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