US659478A

US659478A - Stone-dressing machine.

Info

Publication number: US659478A
Application number: US73071599A
Authority: US
Inventors: Albert F Jones
Original assignee: Individual
Current assignee: Individual
Priority date: 1899-09-16
Filing date: 1899-09-16
Publication date: 1900-10-09
Anticipated expiration: 1917-10-09

Description

No. 659,478. Patented Oct. 9, men;

.A. F. JONES.

STONE DRESSING MACHINE.

(Application filed Sept. 16, 1899.)

4 Shawls-Shet I.

qessea 3.) Mi? ma humus PETERS co. wow-urns" WASHINGTON n. c.

No. 659,478. Patente'd Obi. 9,1900. A. F. JONES;

STONE DRESSING MACHINE.

(Application filed Sept. 16, 1899.)

4 Sheets-Sheet 3.

(No Model.)

JUF'EEEEE .19. BM.

No. 659,478. 4 Patented 0on9; I900.

A. F. JONES. Y STUNE DRESSING MACHINE.

(Application filed Sept. 16, 1899.) (No Model.) 4 Sheets-8haet 4L rArnS Unit ALBERT F. JONES, or SALEM, MASSAoHUsErTS.

STONE-DRESSING MACHINE.

SPECIFICATION forming part of Letters Patent No. 659,478, dated October 9, 1900.

Application filed September 16, 1899. Serial No. 730,715. (No model.)

To all whom it may con/007%.;

Be it known that l, ALBERT F. JONES, 0f Salem, county of Essex, and State of Massachusett-s,have in vented an lm provernen t in Stone- Dressing Machines, of which the following description, in connection with the accom panying drawings, is a Specification, like letters on When beginning to cut the surface of a rough stone, I find in practice that each out should be made from the edge inward and that the operation should continue in this manner until the surface all around the stone has been cut in, say, two or more inches from the edge, and then the operation may continue in this manner or may continue by cut-' ting in parallel lines. By cutting the surface from the edge inwardlyl find that all danger of chipping off the stone at the corners is obviated.

The machine embodying this invention comprises, essentially, a main frame, a truck adapted to support the stone which travels transversely with relation to the main frame and is adapted to be held fixed in any position that it may be set, and a tool-carriage mounted on the frame which is adapted to travel lengthwise the frame at right angles to the movement of the truck and is also adapted to be held fixed in any position that it may be set. The traveling tool-carriage bears the tool or tools, (a pointing-tool and a bushing-tool being preferably employed,) and means are provided for vibrating said tool or tools, which is also borne by the traveling carriage, so that either or both of said tools may be vibrated continuously regardless of the position of the carriage and also regardless of whether the carriage is moving or is held at rest. Means are also provided for holding the pointing-tool at an oblique angle to a horizontal plane and also for varying the obliquity of said angle, and means are also provided for bodily adjusting the tool in the arc of a circle about a vertical axis in order that it may be turned at the corners of the stone and brought into correct position to continue its cutting operation, said means being such that said tool may be bodilyturned to occupy any position of a complete cycle. Means are also provided for adjusting said tool or tools to different elevations, and means are also provided for varying the thrust of the tool, and all of the aforesaid adjustments are of such character that they may be made while the tool is vibrating and the machine is in operation.

Figure 1 shows in front elevation a stonedressing machine embodying this invention; Fig. 2, a plan View of the machine shown in Fig. 1; Fig. 3, an enlarged detail showing the turret and two tools borne by it; Fig. 4, a vertical sectional detail of the turret, showing particularly the means for adjusting it on its vertical axis and also means for adjusting it to different elevations; Fig. 5, a cross-section of the turret shown in Fig. 4:,taken on the dotted linew 00; Fig. 6, a vertical sectional detail of the bushing-tool, its holder, and Support; Figs. 7, 8, and 9, details of the pointing-tool and its sliding tool-holder; Fig. 10, a detail showing in section the support for the pointing-tool holder and also showing the means for operating said tool-holder; Fig. 11, a vertical section of the bushing-tool; Fig. 12, adetail of the bushing-tool to be referred to; Fig. 13, a detail showing means for connecting the bushing-tool with the turret; Fig. 14, an under side view of the pointing-tool, its holder, and support; and Fig. 15, a diagram showing the top surface of a stone and arrows which represent the cutting-tool and also other arrows which represent the direc tion of travel.

The main supporting-frame of the machine, as herein shown, consists, essentially, of horizontal side and end bars a, rigidly secured together to form a rectangular frame, a number of upright bars or corner-posts a, rigidly secured to said rectangular frame, and horizontal side and end bars o rigidly secured together and to the upper ends of said upright bars or corner-posts a, and additional cross-bars will be provided as required to serve as braces and also as hearings or supports forsome of the operating parts, yet said supporting frame may be otherwise constructed.

A stone to be dressed or otherwise operated upon is placed upon any suitably-constructed platform caror truck I), (see Fig. 1,) which is herein represented as composed, essentially, ofa platform or table b, upon which the stone is placed, having bearings b upon its under side which receive and support axles 72 two in number, which hear at their outer ends flanged wheels I). This truck I) is movable transversely with relation to the main frame and is adapted to be held at rest in any transverse position relative thereto and is also adapted to be moved constantly in either direction, and in order that said truck may thus be moved transversely two parallel rails b are employed on which the flanged wheels b run, said rails being secured upon cross-bars b and b the former extending from side to side of the machine and rigidly secured to the front and back longitudinal bars a and the latter extending for any suitable distance outside of or beyond one of said bars 0,. Provision is thus made whereby the truck may be moved transversely relatively to the frame and also moved along to any suitable track which may be provided for it. When the truck I) is placed in position for the tools to operate upon the stone, it is desirable to hold'the truck securely in whatever position it may be set in order that the tools borne by a suitable carriage to be described 5 may travel over it and act upon the stone, yet it is also desirable to provide for moving the truck constantly in either direction, While the carriage bearing the tools remains at rest in order that the tools may also act upon the stone, and to enable these results to be accomplished suitable conveying mechanism is provided for the truck, which, as herein shown, consists of a rack b secured to the under side of the platform I) of the truck I), 5 which extends lengthwise the truck and is engaged by a pinion b secured to a shaft 19 having its hearings in the cross-bars b and in a cross-bard of the frame, and said shaft 1; has secured to it at one end a toothed gear b", which is engaged by a toothed gear 71", secured to a shaft Z3 having its bearings in the cross-bar a and in one of the cross-bars b and also in one of the end bars a of the frame, and said frame 19 has secured to it a worm-wheel b, which is engaged and driven by a worm'b secured on a shaft I2 The shaft 1), bearing the worm b, is supported at one end in a bearing-block b", pivotally connectedmbracket or stand b erected upon one of the end bars ctof the frame, and said shaft b hassecured to it near its opposite end a friction-wheel b, which is held in position on the shaft 19 by a set-screw, whereby it may be adjusted along on said shaft 19 as may be desired and held in fixed position wherever it may be set, and said wheel I) 00-.

cupiesa position between a pair of friction.

plates or disks 1) 19 so that by moving the shaft 19 up. or down it will be caused to engage the upper or lower plate and be thereby rotated. The front end of the shaft 79 has also a bearingin a lever 17, which is pivoted at one end at Z2 to a bracket orjstand b secured to the bar a, and as said lever is moved up and down on its pivot 17 the frictionwheel 19 will be caused to engage the upper or lower friction plate or disk b b or to occupy an intermediate position between said disks. An arm I9 is secured to the cross bar a of the frame, which is formed or provided along one side or edge with three notches, (see Fig. 1,) and said arm is located at one side of and close to the lever 12, so that said lever may engage any one of said notches, according to the position which it is desired it shall occupy, said notched arm thereby holding the lever 11 in either one of three different positions.

The disks 19 19 are rigidly secured to an upright shaft 11 which is rotatedcontinuously by any suitable means, and it will be seen that as said shaft is rotated and the friction-disks b Z7 thereby turned the wormshaft b will be rotated in one or the other direction, according to which disk b 01' b the friction-wheel Z7 is engaging, or said wormshaft b may remain at rest when the friction-wheel I9 occupies an intermediate position between the two disks b Z1 and as the worm-shaft is thus turned in one or the other direction the truck I) will he moved transverselyrelativeto the frame in one or the other direction. By utilizing worm-gearing as a cooperative part of the operating mechanism for moving the truck bit will be seen that said truck I) will be positively held in whatever position it may be set and also while moving the thrust of the tools will be resisted. By adjusting the friction-wheel I) along on the shaft 1), and consequently toward and from the center of the disks 19 b the speed of rotation of said shaft 12 will be varied.

Thus it will be seen that by manipulating the lever 79 the truck may be moved constantly in either direction transversely the frame and also may be moved into any desired position and held fixed.

The upright shaft 1) has its bearings in the main frame and projects above the horizontal bar a of the frame and has a hearing at its upper end in a bracket or stand I), erected on one of the bars a and said shaft has secured to its upper end a driving-pulley 17 over or around which a belt Z1 passes, said belt extending from end to end of the machine and passing around other pulleysto be described and also over or around the pulleys b and-Z1 mounted loosely upon a rod or bar supported by brackets or stands I) b and also around a main driving-pulley I), held in suitable bearings. The pulley b is therefore driven continuously, and whenever it is desired to move the truck I) the le ver b will be operated and the friction-wheel Z1 moved from its normal intermediate position into engagement with one or the other friction-disk Z2 or 11 The mechanism thus described for moving the truck I) and for posi tively holding it in whatever position it may be set is simple and eflicient; but I do not limit myinvention to the employment of this specific mechanism, as it is obvious that other mechanism may be provided whereby the same results may be produced.

The tool or tools which may be employed to operate upon the stone are borne by a carriage which is movable longitudinally or in a direction at right angles to the movement of the truck 5, and said carriage, as herein shown, comprises a top plate or table 0, made of any suitable shape and size, as shown in Fig. 2, having on its under side hangers c, which support the axles bearing flanged wheels 0 which are adapted to run along on rails c, mounted on top of the longitudinal bars of, said rails being made long enough to enable the carriage to move from end to end of the main frame, or substantially so. This longitudinally-movable carriage supports all the tools and the operating mechanism and adjusting devices therefor, and the operating mechanism for the tools is located above the carriage and the tools below it, so that all the various adjustments of the tools may be made without interference.

The longitudinally movable carriage is adapted to travel constantly in either direction and also to be positively held at rest in whatever position it may be desired, and to accomplish these results suitable conveying mechanism is provided for said carriage, which, as herein shown, consists of a shaft (1, having its hearings in hangers d projecting from the under side of the carriage and made of suitable length to extend from side to side of the carriage, and pinions cl, secured to each end of said shaft, which rest upon and run along on rack-toothed bars 61 secured to the longitudinal bars (1 said rack-toothed bars (Z being made as long as required, and

a worm-wheel d is secured to said shaft (Z, which is engaged and driven by a worm (1 (see dotted lines, Fig. 1,) which is secured to an upright shaft d which passes up through the table 0, and said shaft d has secured to its upper end a beveled gear (1 which is engaged by a beveled gear 01 secured to a hori-' zontal shaft (1 disposed obliquely above the table 0 and projecting toward the center of a pair of friction-disks d d which are secured to an upright shaft d, and said shaft d has secured to it a friction-wheel d (see dotted lines, Fig. 2,) which is disposed between said friction-disks d d to be engaged and driven by one or the other of said disks. The friction-wheel c1 is secured to the shaft 61 by a set-screw, so that it may be adjusted along on said shaft toward and from the center of the disks to provide for varying the speed of rotation of said shaft 0Z The shaft (1 is adapted to be raised and lowered, so that the manipulating the hand-wheel d friction-wheel d will engage either the upper or lower friction-disk d d and it is also adapted to be held in an intermediate position between said disks, and, as herein shown, a pivoted bearing (1 is provided on the table 0 for the shaft d to provide for such movement. A lever 61 is pivoted at one end to a stand @1 and said lever passes between the friction-disks 61 c1 and bears at its opposite or free end a roll which occupies a position in a cam-groove cut or formed in a disk (1 and as said cam-grooved disk (Z is turned the lever (Z will be caused to occupy either one of three different positions. The lever d is connected with the shaft d and serves as a means of moving said shaft (1 in order that the frictionwheel (Z carried by it, may engage one or the other friction-disk d (Z or caused to occupy an intermediate position between said disks. The cam-grooved disk 07, is rigidly secured to a shaft d", which has a hand-wheel (1 secured to it, which serves as a means of turning it to thereby in turn operate the shaft 61 The friction-disks (Z d are rigidly secured to an upright shaft 61 to which a belt-pulley d is secured, and the upper end of said shaft c1 has its bearings in an overhanging bracket or stand c1 erected on the table 0. The belt-pulley d is so disposed as to be continuously in engagement with a driving-belt b and to be moved along with the carriage,

yet to continuein engagement with said belt at all times, and consequently the frictiondisks d al will be continuously rotated, yet as the friction-wheel 01 has three difierent positions it. will be seen that the shaft 01 may remain at rest or maybe turned in one or the other direction at the will of the operator by will be seen that the carriage may be moved constantly in either direction at will and may be held at rest in any desired position, and by utilizing a worm-wheel and worm as a part of the operating mechanism for moving'it the thrust of the tools is resisted. It will also be seen that the operating mechanism for the carriage is borne by the carriage and may be readily thrown into or out of operation at the will of the operator.

On the under side of the movable carriage a turret is located which carries the toolholders and tools borne by them, and said turret is adapted to be adjusted vertically in order that the tools may occupydifferentelevations and also adjusted in a rotary direction on its vertical axis, and both of said ad-v justments are independent of each other, yet capable of operation regardless of the other that is to say, the turret may be adjusted to different elevations while held in any position of rotary adjustment and may also be adjusted on its vertical axis While held in any position of vertical adjustment. The turret is adapted to be given a complete rotation, so that the tool or tools carried by it may occupy any position in a complete cycle as said turret is revolved. The turret (see Figs. 1 and Thus it 4) consists, essentially, of an outer cylinder 6, mounted on and supported by a hollow cylinder 6, and said inner cylinder 6 is stationarily supported, and said outer cylinder 3 is adapted to be turned on and relative to said inner cylinder in a rotary direction and also to slide thereon telescopically. The inner cylinder e is formed or provided at its upper end with aflange 6 which is bolted or otherwise secured to the under side of the table 0 of the carriage to thereby hold it stationary. The outer cylinder c has secured to it a bottom plate a which is formed or provided on its inner face with a central boss or projection 6 which projects up into the inner cylinder, and said boss or projection supports at its upper end in an annular groove provided for the purpose a horizontal plate e herein shown as made in two parts which are bolted together, (see Fig. 5,) said plate being thus held in position on the boss or projection (2 yet providing for rotation of said boss or projection, as will be described. The boss or projection e being formed integral with or secured to the bottom plate 6 will rise and fall with the outer cylinder e, and the plate 6 is moved with it, and to guide said plate e and also assist in guiding the outer cylinder e splines e are secured to said plate 6 at opposite sides, which follow in vertical grooves or guideways in plates 6 secured to the interior walls of the inner cylinder 6. For the purpose of supporting the outer cylinder 6 in elevated position and for adjusting it to different elevations two screw-rods 6 are provided,which extend down into the inner cylinder 6 through a top plate e which is bolted to a flange or ring which is secured to the top of said cyl-' inder e, and the screw-threaded portions of said rods e 6 pass through threaded holes in the plate 6 and as said screw-rods are turned in one or the other direction the plate a and outer cylinder 6, connected with it, will be raised and lowered, according to the direction said rods are turned. To turn said screwrods e 6 simultaneously, and thereby move the outer cylinder e vertically, they are each provided at their upper ends with a sprocketwheel 6 6 and a single sprocket-chain a (see Fig. 2) passes around both of said sprocket-wheels and also around a sprocketwheel (2 which is secured to the upper end of an upright rod or shaft e having its bearings in the carriage, and a hand-wheel e is secured to the lower end of said shaft (2 which serves as a means of turning it. Vertical adjustment is thus accomplished by by turning the shaft 6 and thereby turningthe two screw-rods e c simultaneously, and by such means it will be seen that the outer cylinder 6 and parts carried by it will be adjusted at the will of the operator to occupy difl'erent elevations. The

tools borne by the turret may thus be adj usted to diiferent elevations.

For the purpose of turning the turret on its vertical axis, whereby the tool or tools borne by it may occupy difierent positions in the arc of a circle described about said axis, a toothed ringfis secured to the upper end of the outer cylinder 6, which is engaged by a pinion f, secured to an upright shaft f and a worm-Wheel f is secured to the lower end of said shaft f which is engaged by a worm f secured to a horizontal shaft f having socured to it a hand-wheel f so that by turning said hand-Wheel f the shaft f bearing the pinion, may be turned, and the outer cylinder e thereby revolved. The length of the pinion f is sufficient to provide for vertical adjustment of the outer cylinder. ,By utilizing a worm and worm-wheel as a cooperative part of the adjusting device it will be seen that said outer cylinder 6' may be positively held in whatever position it may be set and the thrust of the tools resisted. The turret, which is adjustable vertically and also adjustable in a rotary direction about its vertical axis, is herein shown as carrying or supporting two different tools-via, a pointingtool and a bushingtool-and said tools are held in suitable tool-holders, which are in turn held by suitable tool-holder supports, which are constructed and arranged to admit of the tools being adjusted relatively to the turret and independently thereof.

The pointing-tool g (see Figs. 3, 7, 8, 9, and 10) consists of a rod or bar having a pointed end and made in any usual or suitable manner, and preferably made quadrangular in crosssection or any shape other than round,and, as herein shown, two such tools are provided. The tool or tools 'g,any number being provided as may be desired, are contained in and firmly held by a tool-holder of any suitable construction which is adapted to slide longitudinally. The sliding tool-holder herein shown is composed of a front plate g, recessed longitudinally from its lower end to a point nearly to its upper end to receive a back plate gfiwhich is made of suitable shape to fit said recess, the upper end of said back plate 9* abutting against a shoulder 9 formed or provided at the upper end of the recess in the front plate 9, and said back plate 9 is made in two parts or pieces, to be separately bolted or otherwise secured to the front plate g. The contiguous faces of the front and back plates are each grooved longitudinally to provide sockets in which the tools are placed, said tools being firmly held in place in said sockets by securing the plates together, and the sockets are made of a shape corresponding to the shape of the tools g, so that said tools are held against rotation. The toolsg,when made long enough, will bottom in the sockets, but as they wear away small blocks 9 will be placed in said sockets, against which the tools will abut, any number of blocks being provided for this purpose.

To remove the tools-as, for instance, for the purpose of sharpening them-it is only necessary to loosen the bolts, and thereby relieve the pressure of the back plate 9 The tool-holder g bea ring the pointing-t ools g, is contained in and supported by a tool-holder support in such manner as to slide freely in either direction longitudinally for a short distance, and, as herein shown, said tool-holder g g is formed or provided at each side or edge with a double bevel to present V-shaped portions g g, or said tool-holder may be dovetailed to fit correspondingly-shaped recesses formed or provided in the support.

The tool-holder support bearing the sliding tool-holder g g is made of any suitable construction to accommodate the sliding toolholder and to be adjusted to hold the tools g at any desired angle relative to a horizontal plane, and, as herein shown, said tool-holder support consists of a frame (see Figs. 3, 10, and 14) made open at the bottom and at one side and having a semicircular portion g and also having at its lower end a downwardlyprojecting lip g and at its upper end a circular opening 9 To the under side of said frame g two parallel bars g g are secured, which are located at opposite sides of the frame, said bars being attached at their opposite ends to the opposite ends of the frame 9 The bar g is made nearly as longas the frame 9 and its lower end bears upon or against the inner side or face of the lip g and its upper end projects into the opening g and said bar 9 is attached to the frame at one end by a bolt or screw 2, passing through the frame and the lower end of the bar, and at the opposite end by a screw 3, passing through the frame and into one side of the bar. The bar g is similarly constructed and attached to the under side of the frame g in the same manner. The inner or adjacent sides or edges of said bars g g are formed or provided with grooves from end to end, or substantiallyso, which are made of suitable shape to receive the V-shaped edges g of the sliding tool-holder, said tool-holder being thereby held in position and guided by said bars g g The sliding tool-holder g g is placed in position between the bars g g by inserting it through the opening g in the frame and may be readily removed through said opening at any time. The sliding tool-holder gg has formed or provided on its upper side or face, at its lowerend, a projection 913, which is adapted to strike against the inner side of the lip 9 said lip thereby serving as a rigid stop to limit the downward movement of the sliding tool-holder. When pointinga stone, a sudden longitudinal thrust is given to the tool, and to obtain such movement the toolholder, which is normallyheld pressed against the stop 9 by a strongspring, is raised against the pressure of said spring and is then released, and a sudden downward thrust Ihereby then given to the tool-holder by means of said spring. One way of carrying out this part of my invention consists in providing a block of rubber g, which is designed to serve as a spring, and said rubber block g is held in a yoke Q15, which has formed or provided at its lowerend a ringg which is seated upon the upper end ofthe frame just over the opening g and said ring 9 is hinged or otherwise pivotally connected to said frame at g and is held in fixed position on the frame by means of a screw g orothersuitable fastening. The lower end of the rubber block g is adapted to bear directly upon the upper end of the sliding tool-holder g g and normally holds said tool-holder against the stop 9 and as said tool-holderis raised said rubber block will be further compressed, and the compression of said block may be regulated or adjusted by means of an adjustingscrew g, which passes through the upper end of the yoke 9 and bears upon a plate g, which rests upon the upper end of the rubber block. Theyokeg ,bearingtherubberblock, is hinged to the plate above the opening 9 so that it may be swung to one side, as represented by dotted lines, Fig. 10, to expose said opening and admit of the removal of the sliding tool-holder.

To raise the sliding tool-holderg g against the pressure of the spring g, a projection g is formed on the upper side or face of said tool-holder, which is engaged by a short arm h, which serves as an operating lever, attached to and projecting from a reciprocating shaft h, and when said arm has been moved by the shaft h a certain distance it is suddenly released, and the sliding tool-holder is then thrust downward by the spring 9. The opening in one side of the frame is provided for the purpose of admitting the arm h in order that it may engage and operate the sliding tool-holder. The reciprocating shaft It has projecting from it another arm 77/ which is engaged by a cam h secured to a rotating shaft 71 held in suitable bearings on the outer cylinder 6', and said cam 71 is constructed, as shown, to engage and move the arm 71, and thereby turn the shaft h in one direction to in turn raise the slidingtool-holder, and when said tool-holder has been raised to a predetermined elevation the arm 7t slips off or passes by the projection on the cam and allows the shaft h to suddenly return to its normal position. The shaft h is disposed obliquely or diagonally to the outer cylinder 6 and is supported on said cylinder 6' by a bearing-block h To vary the stroke of the arm h, and thereby vary the distance that the sliding tool-holder shall be moyed to in turn vary the force of the thrust of the pointing-tool, the bearing-block 72, is made adjustable in a direction outward and from the cam k so that the arm it will be acted upon more or less by said cam. The bearing-block h is herein shown as having on its rear side a horizontally-disposed dovetailed recess which eceives a dovetailed projection it", formed on a bracket h secured to the cylinder 6, and said bearingblock h is thereby supported, so as to be moved back and forth and in turn move the arm h to- IIO ward and from the cam h The bracket 71. supports a screw 71 which turns in said bean ing-block 7L5 and serves as a means of adjusting it backand forth. The screw it has secured to it at one end a beveled gear h", which is engaged by a beveled gear h secured to a shaft h having its bearings in a bracket on the cylinder, and a hand-wheel 71 is secured to the outer end of said shaft, which serves as a means of turning it, to thereby adjust the bearing-block 71 The adjustment of the bearing-block 72. is sutficient to enable it to be moved to one side far enough to carry the arm 7L2 absolutely out of the path of the cam 71/3, and when so adjusted the sliding tool-holder will remain at rest even as the cam continuesto revolve. While the means thus described for operating the pointingtool is simple and eificient, I donot desire to limit my invention to the employment of the specific means shown, as it is obvious' that.

other means may be provided capable of accomplishing the same results which come i within the spiritand scope of this invention.

The frame of the tool-holder support is secured to an arm or bracket 2', projecting from the cylinder 6, by bolts 4, which pass through slots 7 in said arm and into and through the frame, and said arm '5 is curved to receive the semicircular portion g of the frame, provision being thereby made for adjustment of said frame relatively to the arm in a circular direction or on a horizontal axis, to thereby vary the angle of the tool-holder and tools carried by it. The semicircular formation g of the frame is employed for the particular purpose of providing for such adjustment of the toolholder, yet it is obvious that this result may be otherwise accomplished Without departing'from this invention.

The shaft h, bearing the cam 72. is adapted to be continuously rotated regardless of the position of the carriage bearing the turret, and to accomplish this result a toothed gear j is secured to the shaft h as, for instance, to its lower end, which is engaged byan idle toothed gearj, supported by a stud projecting from the bottom plate a of the cylinder 6', and said idle gearj' is engaged and driven by a toothed gearj secured to the lowerend of a shaft j which extends up through the center of the cylinder c, passing through the bottom plate 6 and boss or projection e and through the plates 6 and 6 and said upright shaftj has secured to its upper end a belt-pulleyj, which is at all times in engagement with the belt I) even as the carriage is moved from end to end of the machine, and as said shaftj is thus continuously revolved theshaft 72;? will also be continuously revolved by means of the gearing thus described.

By referring to Fig. 1 it will be seen that the belt b passes around one side of the beltpulley d and around the opposite side of the belt-pulleyj andalso around one side of an idle belt-pulley it, supported on the carriage,

and by thus arranging said pulleys relatively to the belt it will be seen that the carriage may be moved along in either direction and said pulleys will at all times remain in engagement with said belt.

By disposing the shaftj which serves as the main operating-shaft for the tool-holder, at or coincident with the axis of the tool-carrier and by connecting the shaft h with said shat'tj it will be seen that the turret may be adjusted on its vertical axis to any different position Without rendering the parts inoperative. It will be observed that the toothed gears j andj travel around the toothed gear fi-i. e., they have a planetary movement relative thereto.'

One of the particular advantages of having the turret adjustable on its vertical axis and supported by a movable carriage is to enable the pointing-tools to always out inwardly from the edge of the stonea result which in practice prevents chipping off small pieces from the edge of the stone.

Referring to Fig. 15, q represents the top surface of a stone, and q the position of the pointing-tool when starting to cut the stone, the out being made from the edge inwardly. While the tool is held in this oblique position and vibrated, the tool-carriage will remain at rest and the truck will be moved transversely, and the stone is carried along by the truck one edge is cut inward for a short distance, but before said stone passes entirely beneath the tool the tool is swung on its vertical axis to cut around the corner and is soon brought into the position marked g and then the truck is stopped and the tootcarriage travels from left to right and another edge is cut inward for a short distance but before the toolcarriage carries the tool by or beyond the stone the tool is again swung on its vertical axis into the position marked (1 the tool-carriage stopped,and the truck started,and as the truck returns to its starting-point another edge of j the stone is cut, but before the stone is carried entirely beneath the tool said tool is again swung into the position marked 9 and the truck stopped and the tool-carriage started, and by thus alternately operating the truck and tool-carriage and swinging the tool on its vertical axis the stone will be cut in ward from the edge as far as desired. A single cut may be made inward from the edge entirely around the stone or as many cuts as desired, although instead of cutting the entire top surface in this manner the middle portion within certain prescribed limits may be cut in par allel lines if desired, yet in ordinary working of the machine no particular advantages are gained by thus changing the operation. As the stone is cut. inwardly from the edge all around, it will be seen that the turret bearing the cutting-tool makesa complete revolution and that the said tool occupies dilferent positions in a complete cycle as the turret is thus revolved.

The bushing-to01 which will be employed in connection with my machine may he of any usual or suitable construction; but the particular construction herein shown possesses certain novel features, and it consists, essentially, of a number of flat plates m, formed with cutting edges and disposed in a gang in a recessed head, and said head is composed of a base m, having side pieces and end pieces which present a rectangular recess in which the plates on are placed, and one of the end pieces, as 771 is hinged at m to the base in order that it may be moved outwardly for the purpose of removing the plates whenever desired, and such hinged end piece m projects beyond the adjoining sides of the head, and a loop-like or U shaped strap m passes around said head, the ends of which project through holes in the hinged piece m and said projecting ends receive upon them nuts m. Thus the plates m are held clamped in position by the strap, but may be removed by loosening said nuts m The head carrying the plates is secured to the lower end of an operating rod or bar 72, which is splined into a sleeve or bushing 11', so as to slide freely longitudinally in either direction, but is prevented from rotation within the sleeve or bushing, and said bar n and head carried by it serves as and constitutes the tool-holder. The sleeve or bushing 17. is contained within and supported by a frame '0 which is bolted or otherwise secured to the cylinder 6, and said sleeve and frame serve as the tool-holder support.

It is designed and intended that the bushing-tool shall have a sudden thrust, like the pointing-tool heretofore described, and to accomplish this result the upper end of the rod or bar n has secured to it a circular flange or disk 11 the under side of which is engaged by one end of a lever n, which projects through an opening 21 in the frame n so as to occupy such position beneath the flange, and said lever 91 is pivoted at n to a block 12 ata point intermediate its length, and its opposite end is engaged by a cam 12 secured to the rotating shaft 71 As the cam n revolves the lever a will be operated to repeatedly raise the rod or bar at. A rubber block 729 is provided which bears upon a plate n resting upon the upper end of the rod or bar n, and said rub ber block 92 is held more or less compressed and its pressure regulated by an adjustingscrew n which passes through the upper end of a yoke 9%, formed or provided at the upper end of the frame n As the lever n is raised by the cam 92 the rod or bar at will be raised against the pressure of the rubber block n, and when said lever is released a sudden thrust is given to the rod n by the springn. The. block M, to whichthe lever n held in different elevations.

of the block n is varied the lever 11/ will be moved toward and from the cam n, so that the force of the thrust given to the rod or may be more or less, and when said block is adjusted to occupy its lowermost position said lever 01 will be moved out of the path of the cam n and at such time the bushing-tool will remain at rest as the cam it revolves.

The bushing-tool may be adjusted on its vertical axis to occupy any position desired relative thereto, and to accomplish this result the sleeve or bushing n is formed or provided at its lower end with a worm-wheel 0, which is engaged by a worm o, secured to a shaft 0 having its hearings in a bracket 0 secured to the cylinder 6', and a hand-wheel o is secured to said shaft 0 which serves as a means of turning it. The frame n (see Figs. 3, 6, and 13) projects from a circular plate 91 which is formed or provided with two curved slots 71 through which bolts 47, pass, which enter a boss 11 on the cylinder e, and said slots permit turning the plate 11 so that the bushing-tool may be swung to one side by turning it on a horizontal axis into out-of-use position.

In order that the bushing tool may be adapted for cutting an irregular surface, I have provided blocks, such as on, which may be placed in the holder, as shown in Figs. 6 and 11, which act. to hold the plates, with their cutting edges, in different relative planes.

It will be seen that the two different tools herein described maybe operated independently or at the same time, as may be desired, according to the work being done.

As an illustration of the work to be done the pointing-tool may pass once over the surface of the stone, and then in passing over the stone the second time the pointing-tool may be again used, followed by the bushingtool, both tools operating at the same time, and finally in passing over the stone the third time the bushing-tool alone may be used, thus in three operations the stone will be twice acted upon by the pointing-tool and also twice act-ed upon by the bushing-tool.

I claim 1. In a stone-dressing machine, the combination of a turret adapted to turn on a vertical axis, a tool carried by said turret, a cam also carried by said turret for raising said tool, a spring for suddenly returning said tool when the cam releases it, a driving-shaft for said cam which passes through said turret, means for rotating said driving-shaft, and means for adjusting said turret about its vertical axis while said driving-shaft is operating, substantially as described.

2. In a stone-dressing machine, the combination of a turret adapted to turn on a vertical axis, a tool carried by said turret, a cam also carried by said turret for raising said tool, a spring for suddenly returning said tool when the cam releases it, a driving-shaft for said cam which passes through said turret, means for adjusting said turret about its vertical axis, means for adjusting said turret to different elevations, and means for rotating said driving-shaft while the turret is be ing adjusted, substantially as described.

In a stone-dressing machine, the combination of a carriage, means for moving it back and forth, a turret borne by said carriage adapted to turn on a vertical axis a complete rotation, a tool-holder carried by said turret, a tool held by said tool-holder at an oblique angle to a horizontal plane, a cam carried by said turret for raising the tool, a spring for suddenly returning the tool when the cam releases it, a driving-shaft for said cam, and means for adjusting said turret about its vertical axis whereby the tool may occupy a position at an oblique angle to the movement of the carriage and also any other position in the cycle in which said turret revolves, substantially as described.

4. In a stone-dressing machine, the combinationof a carriage, means for moving it back and forth, a turret borne by said carriage adapted to turn on a vertical axis a complete rotation, a tool-holder carried by said turret, a tool held by said tool-holder at an oblique angle to a horizontal plane, a cam carried by the turret for raising the tool, a spring for suddenly returning the tool when the cam releases it, a driving-shaft for said cam, means for adjusting said turret about its vertical axis whereby the tool may occupy a position at an oblique angle to the movement of the carriage and also anyother position in the cycle in which said turret revolves, and means for adjusting said turret to different elevations, substantially as described.

5. In a stone-dressing machine, the combination of a truck bearing a stone to be operated upon, means for moving it back and forth, a turret adapted to turn on a vertical axis a complete rotation, a tool-holdercarried by said turret, a tool held by said toolholder at an oblique angle to a horizontal plane, a cam carried by the turret for raising the tool, a spring forsuddenly returning the tool when the cam releases it, a driving-shaft for said cam, and means for adjusting said turret about its vertical axis whereby the tool may occupy a position at an oblique angle to the movement of the truck and also any other position in the cycle in which said turret revolves, substantially as described.

6. In a stone-dressing machine, the combination of a truck bearing a stone to be operated upon, means for moving it back and forth, a turret adapted to turn on a vertical axis a complete rotation, a tool-holder carried by said turret, a tool held by said toolholder at an oblique angle to a horizontalplane, a cam carried by the turret for raising the tool, a spring for suddenly returning the tool when the cam releases it, a driving-shaft for said cam, means for adjusting said turret about its vertical axis whereby the tool may occupy a position at an oblique angle to the movement of the truck and also any other position in the cycle in which said turret revolves and means for adjusting said turret to diiferent elevations, substantially as described.

7. In a stone-dressing machine, the combination of a carriage, means for moving it back and forth, a turret borne by said carriage adapted to turn ona vertical axis a complete rotation, a tool-holder carried by said turret, a tool held by said tool-holder at an oblique angle to ahorizontal plane, means for vibrating said tool, means for adjusting said turret about its vertical axis whereby the tool may occupy'a position at an oblique angle to the movement of the carriage and also any other position in the cycle in which said turret revolves, a driving-shaft passing through said turret which serves as a cooperative part of the means for vibrating said tool, driving mechanism in continuous engagement with which said driving-shaft is adapted to be held as the tool-carriage travels back and forth and also as the turret is adjusted on its vertical axis, a truck bearing the stone to be operated upon and means for moving it back and forth at right angles to the movement of said tool-carriage, substantially as described.

S. In a stone-dressing machine, the combination of a carriage, means for moving it back and forth, a turret borne by said carriage adapted to turn on a vertical axis a complete rotation, a tool-holder carried by said turret, a tool held by said tool-holder at an oblique angle to a horizontal plane, means for vibrating said tool, means for adjusting said turret about its vertical axis whereby the tool may occupy a position at an oblique angle to the movement of the carriage and also any other position in the cycle in which said turret revolves, means for adjusting said turret to difierent elevations, a truck bearing the stone to be operated upon and means for moving said truck back and forth at right angles to the movement of said tool-carriage, substantially as described.

9. In a stone-dressing machine, the combination of a carriage, means for moving it back and forth, a turret borne by said carriage adapted to turn on a vertical axis a complete rotation, a tool-holder carried by said turret, a tool held by said tool-holder at an oblique angle to a horizontal plane, means for vibrating said tool, means for adjusting said turret about its vertical axis whereby the tool may occupy a position at an oblique angle to the movement of the carriage and also any other posit-ion in the cycle in which the turret revolves, means for adjusting said turret to different elevations, a driving-shaft passing through said turret which serves as a cooperative part of the means for vibrating said tool, driving mechanism in continuous engagement with which said driving-shaft is adapted to be held as the carriage travels back and forth and also as the turret is adjusted on its vertical axis and to different elevations, a truck bearing the stone to be operated upon and means for moving said truck back and forth at right angles to the movement of the carriage, substantially as described.

10. In a stone-dressing machine, the combination of a tool, a tool-holder therefor, a support for holding said tool-holder with its tool disposed at an oblique angle to a horizontal plane, an adjusting device for said support whereby said obliquity of the tool may be varied, means for vibrating said tool, a turret adapted to turn on a vertical axis a complete rotation which carries said tool-support and the means for vibrating the tool whereby said turret may be turned while the tool is vibrating, means for adjusting said turret about its vertical axis whereby the oblique cutting-tool may be held in any position in the cycle in which said turret moves, a carriage bearing said turret, means for moving it back and forth while the tool is vibrating, a truck bearing the stone to be operated upon and means for moving it back and forth at right angles to the movement of said carriage, substantially as described.

11. In a stone-dressing machine, the combination of a tool, a tool-holder therefor, asupport for said tool-holder adapted to hold the tool at an oblique angle to a horizontal plane, an adjusting device for said support whereby said obliquity of the tool may be varied, a cam for raising said tool, a spring for returning it when said cam releases it, a turret adapted to turn on a vertical axis a complete rotation which carries said tool-support and the operating device for the tool, means for adjusting said turret about its vertical axis whereby the tool may occupy any position in the cycle in which said turret moves, a carriage bearing said turret, and means for moving said carriage back and forth, substantially as described.

12. In a stone-dressing =machine, a turret adapted to turn on a vertical axis, a vibrating tool carried by said turret, a stop for limiting the downward thrust of said tool, a spring for normally holding said tool in its lowermost position resisted by said stop, a cam for raising said tool against the action of said spring, which latter suddenly returns the tool when the cam releases it, means for rotating said cam, and meansfor adjusting the turret on its vertical axis, substantially as described.

13. In a stone-dressing machine, a turret adapted to turn on a vertical axis acomplete rotation, a vibrating tool carried by said turret, a tool-holder for holding said tool at an oblique angle to a horizontal plane, a stop for limiting the downward thrust of the tool, a spring for normally holding said tool in its lowermost position resisted by said stop, a cam for raising said tool against the action of said spring, which lattersuddenly returns the tool when the cam releases it, means for rotating said cam, and means for adjusting said turret on its vertical axis whereby the tool carried byit may occupy any position in the cycle in which said turret revolves, substantially as described.

14. In a stone-dressing machine, a turret adapted to turn on a vertical axis a complete rotation, a vibrating tool carried by said turret, a tool-holder for holding said tool at an oblique angle to a horizontal plane, a stop for limiting the downward thrust of the tool, a spring for normally holding said tool in its lowermost position resisted by said stop, a cam for raising said tool against the action of said spring, which latter suddenly returns the tool when the cam releases it, means for rotating said cam, means for adjusting said turret on its vertical axis whereby the tool carried by it may occupy any position in the cycle in which said turret revolves, a carriage bearing said turret and means for moving it back and forth, substantially as described.

15. In a stone-dressing machine, a turret adapted to turn on a vertical axis a complete rotation, a vibrating tool carried by said turret, a tool-holder for holding said tool at an oblique angle to a horizontal plane, a stop for limiting the downward thrust of the tool, a spring for normally holding said tool in its lowermost position resisted by said stop, a cam for raising said tool against the action of said spring, which latter suddenly returns the tool when the cam releases it, means for rotating said cam, means for adjusting said turret on its vertical axis whereby the tool carried by it may occupy any position in the cycle in which said turret revolves, a carriage bearing said turret and means for moving it back and forth, a truck bearing the stone to be operated upon and means for moving it back and forth at right angles to the movement of the carriage, substantially as described.

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

ALBERT F. JONES.

Witnesses:

B. J. N OYES, J ENNIE L. HUTCHINSON.