US329289A - Machine for grinding metal surfaces - Google Patents

Description

A.. DAMS.' MA CHINE' FURv GRIND'IN-G' METAL "SURFACE lS'.

Patented 00u27, 1885.

' UNITED .STATES PATENT OFFICE.

ALFRED DAWES, oF EoSToN, MASSACHUSETTS.

MACHINE FOR GRINDING METAL SURFACES.

SPECIFICATION forming part of Letters Patent No. 329,289, dated October '27, 1885.

Application tiled November 10, 18H4. Serial No. 147,475. (No model.)

' the dovetailed slide e, and mounted loosely To all whom, it may concern:

Beit known that I, ALFRED DAWES, of Boston, (Ohelsea,) in the county of Suffolk and State of Massachusetts, have invented certain new and useful Improvements in Machines for Grinding Metal Surfaces, of which the followment, and combinations of parts, which will base broken away.

be readily understood by reference to the description of the drawings,and to the claims, to be hereinafter given.

Figure 1 of the drawings is a side elevation of a machine embodying my invention. Fig. 2is a front end elevation of the same with the section through the grinding-wheel and work carriage or table. Fig. 4 is a plan of the work carriage or table and the gage; and Fig. 5 is a vertical transverse section of the bed on line w a; on Fig. 1, looking toward the plate L.

A is the bed O f themachine,supported upon the column B, provided with the base-flange B', by which the machine may be firmly secured in position upon a bench,or to the floor of the building, in which latter case the column B would be made of sufficient height to raise the grinding-wheel to a convenient position for operation. The bed A is made hollow and slotted at top and bottom in a wellknown manner, and has iirmly secured thereon,directly over the column B, the head-stock C, in the bearings C C of which is mounted the shaft D, having secured thereon the driving-pulley E,as a means of imparting thereto the desired rotary motion. Upon one or both ends of the'shat't D is mounted a grindingwheel, F, composed of the metal lap or holder a and the emery-disk b, the holder a being provided with the annular lip a', to inclose a portion of the thickness of the emerydisk b, which is secured to the holder a by a film of cement, c, interposed between said disk and holder, as shown in Fig. 3.

G is a tail-stock or stand adj ustabl y secured upon the bed A in front of the grinding-Wheel F, and carrying between its two upright ears or cheeks,d and d,the semi-cylindrical bed For support H, provided upon its upper Side with Fig. 3is a partial vertical'v upon the axial bolt or shaft I, set in the ears or cheeks d and d', with its axis parallel with the radial face of the emery-disk b.

J is the'work-supporting carriage or bed,t ted to and movable endwise upon the dovetailed slide e, as shown in Fig. 3. The cheeks d and d of the tail-stock G are each provided with a curved Slot, j', made concentric with the center of the bolt I, through which passes the clamping-bolt g,which screws into the end of the semi-cylindrical support H as a means l ofadjusting the upper surface of the carriage or bed J to any desired angle to the radial face of the grinding-Wheel. h, is fitted to a hole in the cheek d, and enters a corresponding hole in the head of the sup- .port H, for the purpose of accurately registering said support in a position with the upper surface of the carriage J exactly at right angles to the radial face ot the grinding-wheel, as shown in Fig. 1, said pin h being removed when it is desired to set the carriage J at any o other angle t'o the face of t-he grinding-Wheel.

An index-plate, z', is secured to the front edge of the cheek d, the upper end of which has formed thereon the horizontal knife-edge i', by means of which, acting in conjunction with the graduated scale j ou the contiguous curved front surface of the support H, said support may be set at any desired angle with great facility and accuracy.

K is a handle attached to the carriage J, by which said carriage may be reci procated upon the slide e during the operation of grinding.

A nice adjustment of the work toward or from the grinding-wheel may be obtained by means of the set-screw k, mounted in the upper end of the adjustable plate L, the inner end of the screw 7c abutting against the outer end of the tail-stock or stand G, as shown in Fig. 1. The plate L is provided with the slot Z to A register-pin,

receive the guide-pin m, fixed in the end of the bed A, and the clamping-bolt u, which screws into the end of said bed to clamp said plate in its most elevated position, and by unscrewing orslackenin'g which, said plate L may be depressed till its upper end is on a line with or below lthe upper surface of the bed A, the screwk dropping into the longitudinal slot in the upper surface of the bed, A and below the under surface of the tail-stock IOO at right angles to the radial face ol' the grinding-wheel, or at any desired angle between that and forty-five degrees. rlhis could readily Avbe accomplished by a simple movement of said gage around a fixed fulcrum-pin passing through a hole in said gage which it lled, and clamping it by a bolt passingA through a segmental slot the curve of which is concentric with the axis of said pivot; but in such case, when the gage is moved into any other position than at rightA angles to the front and rear edges of the carriage J, the pointrof` said gage will recede from therear edge of said carriage. For some kinds of light work it is very desirable that in whatever position the gage is placed its point r should extend to the rear edge of thegcarriage J, and to accomplish this I form in the gageN aslot, s, extending parallel wit-h the edge p of said gage, through which slot the fulcrum-pin s passes andV is screwed into the carriage J. I also iorm in the opposite end of the gage N the segmental slot t, the curve of which is eccentric to the axis of the pin s', through which slot the clamping-bolt t passes and is screwed into the carriage J. By means of this construction and-.arrangement ofthe slots s and tand the fulcrumpin s 'and bolt t", if the front or outer end of the gage N be moved to the right, or so that the slot t in said gage traverses the bolt t', the slot s will be 'made to traverse the pin s', and the point o' oi' the gage will be maintained in line with the rear or inner edge of the carriage J, as indicated in dotted lines in Fig. 4. Aportion of the outer edge of the gage N is beveled, and has a scale of degrees, a, marked thereon, which, in connection with the index-mark u', formed upon the carriage J, serves to facilitate the accurate adjustment of the gage to the desired angle.

Two register-pins, c v, are' nicely fitted to holes in vsaid gage, and corresponding holes 5o in the carriage J, as a means of greater security in holding the gage in place when set at right angles to the front and rear edges of the carriage J.

One or more threaded holes, w w, are formed in the carriage J to receive a clampbolt for securing thereto the ordinary machinists clamp for holding the work in position on the carriage. As this clamp forms no part of my present invention, it is not represented in the drawings, and needs no further description here.

0 is a sheet metal plate secured to the back edges of the cheeks d and d', and provided with the foot O', covering the top of the bed immediately beneath the grindingwheel, the whole being designed to prevent the grit and dirt from the grinding-wheel getting into the bearings or working parts of arranged to be reciprocated by hand; but it sired, and..in 'some cases I intend to apply mechanism thereto to impart a positive and regular reciprocation thereto.

What I claim as new, and desire to secure by Letters Patent of the United States, is-

1. The combination,in a grinding-machine, of the grinding-wheel F, the tail-stock G, provided with the upwardly-projecting ears or cheeks d and d', and having formed in one of said cheeks the curved slot f, the semi-cylindrical bed H, provided upon its upper surface with the dovetailed slide e, the shaft I, mounted at each end in said cheeks, and extending longitudinally through said bed, con'- centric to its semi-cylindrical periphery, and the rectangular work supporting table J, having aplain'iiat upper surface, to receive the work to be ground, and provided with the handle K, and fitted to and movable upon clamping-bolt g, all arranged and adapted to operate substantially as described. Y

2. The combination of the bed A, the tailstock G, provided with the upwardly-projecting ears ,or cheeks d d', and the curved slot f, the semi-cylindrical or D-shaped bed H, providedgwith a dovetailed slide upon its upper surface, and a graduated scale' upon its curved peripheral surface, near one'end thereof, the bolt g, for clamping said bed H in the desired position, the index i on t-he front of the cheek d, and coinciding with the periphery of the bed H, and the table J, having a flat upper surface and made rectangular in plan, and of a length equal to the length of the bed II, plus the desired movement to be given. thereto, substantially as shown and described.

3. In combination with the tail-stock G and bed A, the set-screw 7cv and the adjustable plate L, arranged and adapted to operate substantially as described.

4.. The gage N, provided with the slots s and t, in combination with the carriage J, lthe fulcrum-pin s', and the clamping-bolt t,- all constructed and arranged to operate substantially as described.

5. The gage N, provided with the slots .s and t, and the scale of degrees u, in combination with the carriage J, the fulcrunrpin s', the clamping-,bolt t', and the index u', all arranged and adapted to operate substantially as described. i

In testimony whereof I have signed my /name to this specification, in the presence of November, A. D. 1884. i

ALFRED DAWES.

Witnesses:

N. C. LOMBARD, WALTER E. LOMBARD.

the machine. In the drawings the carriage J is shown as may be reciprocated automatically, if dethe dovetailed slide on said bed H, and the IIO two subscribing witnesses, on this 7th day of

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