US1727846A - Automatic block-turning machine - Google Patents

Description

Sept. 10, 1929 c. G. WERNMARK 1,727,846

AUTOMATIC BLOCK TURNING MAC HINE Filed Aug 1'5, 192'! s Sheets-Sheet 1 I INVENTOR 41 07! ATTORNEY Sept. 10, I929. c, WERNMARK 1,727,846

AUTOMATIC BLOCK TURNING MACHINE Sept. 10, 1929. c, WERNMARK 1,727,846

I AUTOMATIC BLOCK TURNING MACHINE Filed Aug. 15, 1927 3 Sheets-Shget 3 INVENTOR [Jr] 6. BY

j %EY Patented Sept. 10, 1929.

UNITED STATES PATENT reme.

CARL G. WERNMARK, OF WALLA WALLA, VTASHING'ION, ASSIGNOR OF'ONE-HALF TO FILL N. ESTES, OF WALLA WALLA, WASHINGTON.

AUTOMATIC BLOCK-TURNING MACHINE.

Application filed August 15, 1927. Serial No 212,898.

This invention relates to automatic block turning machines, more particularly a machine adapted to turn Wooden heels as used in the shoe industry.

One of the objects ofthis invention is to provide an automatic machine that will form turned heels in pairs from a given pattern form whereby the pairs of heels are identical in form and weight.

Another object of the invention is to provide an automatic machine that may constitute a multiplicity of heel turning units all governed by a single pattern form.

A further object of the invention is to provide an automatic'machine that is adapted to use various forms of patterns by the proper adjustment of theparts.

With these and other objects in view reference is now made to the accompanying drawings in which Fig. 1 is a plan view of the block turning machine as designed to turn four blocks simultaneously Fig. 2 is a side elevation taken on the line 22 of Fig. 1, showing the chute and its op erating mechanism;

F 3 is a sectional elevation taken on the line 33 of Fig. 1 showing the spur center rotating mechanism and shifting means Fig. 4- is a front elevation of a fragment of the machine;

Fig. 5 is an enlarged View of oneof the cen tering mechanisms;

Fig. 6 is a sectional elevation of one ofthe centers showing its sliding arrangement;

Fig. 7 is an end elevation of a plate adapted to fit into and adjustthe chute to accommodate other forms of'blocks shown inrelation to the chute (dotted);

Fig. 8 is a perspective view thereof;

Fig. 9 is a transverse view of that part of Fig. 2 showing the chute in its retracted posit-ion; and j Fig. 10 is a perspective view of the yoke.

Having reference to the drawings like numerals refer to like parts throughout the several views and the numeral 1 refers to a frame consisting of the usual uprights 2 and crosspieces 3.

Rotatably mounted in the cross-pieces of the frame is a laterally positioned carriage rail 4 extending throughout the lateral'length of the frame andmountedon this rail isa reciprocating tool carriage 5 that, in addition to sliding back and forth thereon, is adapted to rock ina vertical plane for appurpose to be explained. A counter-balance 6 is mounted ,on the car riage and is positioned with respect to the fulcrum, i. e. the carriage rail 4, to balance the forwardly extending parts consisting of the main table 7 and forwardly extending arms 8 in which are suitably journaled a'tool shaft 9 to be hereinafter described.

A main shaft 10 is rotatably mounted in and extends laterally of the frame and may be driven in anysuitable manner, as a prime mover not shown, and a c'ross-shaft- 11 connects the main shaft with the carriage rail 4-, for the rotation of that member," prefer ably by means of upright shafts 12 suitably journaled in and supported by the frame.

As these shafts 10, 11,;and .12, operate the reciprocating means of said carriage, and as the reciprocating movement of said carriage, is relatively slow, worms 13 and worm-gears 14 are/mounted msmawnym these shafts in engageable relation and are used to reduce the speed ,ofthe reciprocating mechanism which will now be described] The reciprocating mechanism consists of a screwthreaded shaft 15 formed as part of the carriage rail 4 with its threads running in two directions, and alternately engaging this screwthreaded shaft are internally threaded segments 16 securelymounted in yokes 17 for movement therewith to alternately engage or disengage the respective threadson said rail, and slidably secured in the yoke are hearings or sleeves 18 having a common center, both of which bearings are adjustably and securely mounted on a guide-shaft 19 secured to the carriage by hangers 18 as shown or in any suitable manner with said yokes being adapted to alternately slide backward or forward on the hearings to threadedly engage the segments with said screwthreaded shaft 15.

To move the yokes 17 at a predetermined time and in synchronized relation to the other parts of the machine, to be explained,

a tripping rail 2Ov is provided having a segmental track 21 common to the respective yolres, with yielding members 22 attached to the side of the rail-20, at opposite ends of said track to alternately engage the yokes as they approach either end of the track to suddenly move the yoke when it comes to the end of thetraclr thereby causing the yolre to engage or disengage the screwthreaded shaft 15 through the medium of the threaded segments and thus provide for alternate right or left, or reciprocating movement of said carriage.

Obviously the tripping rail must remain stationary with respect to the reciprocating movement of the carriage and for this purpose the tripping rail is secured to the rail i by an arm 21, anda collar 21 adapted to prevent its tendency to longitudinal movement.

' The yoke is provided with a roller 22 secured thereto and positioned to register alternately with the respective sides of the track as the yoke is moved backward or forward by the yielding members 22, the roller and the track thus serving to lock the respective segments both into or out of engagement with the threads'of the screwthreaded shaft. 7

Mounted on the tool shaft 9 are cutting tools 23, one tool for each block (to be hereinafter explained), and these tools consist preferably of wheels having their perimeters formedto constitute a multiplicity of cutting edges. Shifting collars 24 are also adjustably mounted on said shaft 9, for a purpose to be explained. r

In a turning operation it is a recognized fact that either the article to be turned must rotate with high rate of speed or, as where a drilling operation takes place, the tool must operate at a relatively high rat-e of speed. In this case the tools are rotated at a relatively high speed and independently of other parts of the machine by the preferred means of a motor 25 mounted on and traveling with said carriage and suitably connected with said tool shaft by a belt 26 or equivalent means.

Mounted on ,the carriage 5, preferably looselyr upon the tool shaft 9 thereof, is a pilot wheel 27; preferably of equal diameter with the cutting tools, and its face 28 is rounded to conform with the cutting edges of the toois and the pilot wheel is positioned in alignment with said cutting tools, for a purpose to be explained.

A bed'rail 29 extends laterally of and is secured to the frame 1 in any suitable manner, and a bed plate 30, also extended laterally and paralleling the rail, is situated centrally of theframe, and the bed rail and bed plate form a bed on which one or more relatively low speed centering mechanisms 31 are slidably supported for lateral adjustment.

The number of these mechanisms is only limited by the length of the carriage, this in. turn limiting the length of the tool shaft, and this the number of centering mechanisms sup orted by said bed.

The mechanisms 31 consist of a table 32 mounted on and supported by the bed rail and bed plate respectively in which table is mounted spur centers 33 the centers being adapted to rotate by means of a square or spline shaft 3 on which the centers are slidably mounted, and being adapted to slide in opposed directions, by shifting levers 35 consisting of a main lever 36 pivotally at tached to the top of the mechanisms, as at 36*, and extended rearwardly to terminate in an elongated sleeve 37 curved to form an arc, the radius of which extends from the center of the carriage rail 4, and the main lever 36 is extended forward for engagement with a hand operated, laterally positioned, rod 38 wherewith the shifting of the centers may be done manually. A secondary lever 39 is also pivotally attached to the table at the rear end thereof and is extended forward and terminates in a cross-arm 40 which joins the two levers for united action, whereby an advancing or retracting movement of the opposed centers is accomplished simultaneously. Where the levers are automatically operated the collars 24 on the tool shaft 9 are set to properly engage the sleeve 37 of the main lever 36 when the carriage is in one position while the shoulder 41 of the tool will engage the sleeve when the carriage 5 is in the opposite position. By this means it is obvious that as the carriage performs its reciprocating movement it automatically advanoes and retracts the centers to engage or disengage the blocks 42 to be turned.

This movement of the shifting means 35 also acts to start or stop the rotation of the centers as follows; the driving means for said centers consists of a worm 43 mounted on and operable by means of the main shaft 10, and a worm gear 4% mounted on a drive shaft e5 extended rearwardly, with this shaft carrying a worm 45 engageable with a worm wheel 46 mounted on the square shaft 34, with a clutch 47 inserted in said drive shaft.

Now, to stop the rotation of the centers, it is necessary to disengage the clutch and for this purpose a bell crank 48 is provided which is pivoted to the table 32 with one arm 48* of the crank engaging the driving clutch 47 to slidably operate that member, and with the other arm 48* extended forward to pivotallv engage the main shifting lever, as at 48 whereby as said shifting lever is moved by the reciprocating movement of the carriage the clutch will become disengaged as the centers are retracted and released from the block, and their rotation will then cease. Obvious ly, the reverse movement will serve to start the rotation of said centers.

, Obviously with the centering mechanism resting on the bed the said spur centers are in line, and to control and guide the movement of the tools a form-holding spur center 49 is suitably mounted on said bed in'any approved manner and in aligned and rotatable relation with the spur centers of the centering mechanisms, with a wood center suitably aligned and mounted for manual operation in the usual manner of such centers to secure a pattern form 51.

The pattern form may be of any shape within the limits of this machine, but in this case it consists of a form of the nature of a pair of heels joined together at their inner-faces, with the form positioned to frictionally engage, and rotate the pilot wheel 27, in a manner that the pilot wheel which is loosely mounted on the tool shaft 9 will follow precisely the contour of said pattern form, whereby the cutting tools will be guided in their operation. v '1 For this purpose the centering mechanism 31 operates at a relatively low speed and by this means the pattern rotates slowly and raises and lowers the pilot wheel with a slow movement, as the carriage, and with it the cutting tools, are reciprocating back and forth, and, at the same time, the blocks 42 are rotated in synchronized relation with the form,

As the blocks and the form 51 have a relatively long major axis and a relativelyshort minor axis it is obviously essential that the major axis of the block and form have the same position and the same angle ofinclina tion initially.

For this purpose a feeding chute 52 is provided that is pivotally mounted on the up right 54, which in turn is supported by said bed rail 29, for slidable adjustment thereon, with the chute positioned initially with its discharge end 58 interposed between the spur centers of the adjacent mechanisms, and with its form adapted to coincide with the contour of the blocks.

This initial position of the chute provides for the true disposition and inclination of the block as the centers are advanced for the purpose of gripping said block,fand arms 53 are provided rigidly attached to and movable with one of said chutes and extended to engage said pattern form, as the chuteassumes its initial position (the pattern form coming to rest at the moment that the chute assumes this position), with the arms engaging the long side of the pattern form, thereby causing the pattern formto assume the identical angle of inclination with the block at the initial moment of being seized by said centers.

Let it be here understood that while the chute has been described as positioned between the spsur centers of adjacent mecha nisms it is obvious that the two outside chutes will be adjacent to the centering mechanism on one side only and that while spur centers are expressed throughout, a wood center will obviously be used at the right side of the right-hand block. I a

The feeding chute 52 is pivotally mounted on an upright 54 supported by the bed rail 29 as above mentioned and isadapted to retire its discharge end as the centers seize theblock ina manner-to beexplained, and a curved arm 55 is provided, preferably attached to the upright 54: in a position that its upper end will passthrough an orifice 56 in the bottom 57 of said chute as the chute is retired. By, so doing this curved arm engages the first of succeeding blocks and as the chute is retired it presses these blocks backward to provide for the free movement of the block (secured in the centers) during the turning operation;

The chute 52 is retired by meansof clutch controlled cams 58 positioned in operable contiguity with the respective chutes, the cam shaft 59being driven by a cross-shaft 60 from the main shaft 10, by anysuitable gearing, as 60 and 60 and mountinga clutch ,61 which is automatically released and engaged in the following manner; the clutch is mounted on the cam-shaft, and a bell crank ,62 is pivotally attached to the table 32 of the mechanism, and has one end in operable association with the cam clutch while the other end is operably .4

associated with the aforementioned driving clutch 4L7.

From the above it is obvious that as the shifting levers 35 (including levers 36 and 39) are shifted to release the lowermost of the blocks 42 the bell crank will operate to disconnect the driving clutch 4:7 and as a result the rotation of the centers will cease, and as this driving clutch moves for dlsengagement it actuates the cam clutch ,61, through the bell crank v62, which becomes engaged to ret1rethechute by moving the cam in a manner to permit the discharge end of the chute to lower by gravity. i

It is also obvious that as the cam completes is revolution, the chute will be restored to its initial position, then with the movement of the carriage synchronized to operable relation with the driving mechanism, thespur centers will be caused to seize the blocks and start their rotation, and the chute will then again retire, the cam clutch remaining disengaged until the completion of the turning operation, when the operation will be repeated.

A stop 63 is provided at the lower end of the chute against which the blocks rest in their initial position preparatory to turning, and, while other chutes may be substituted to receive blocks of a different cross-section it is advisable that an adjusting plate64 having its own stop 63 be provided to rest in the bottom of said chute, as a substitute therefor,to change the lateral inclinationthereof to,ac-'

commodate the diflerent blocks.

From the above it now becomes obvious 'llO r by gravity.

that the blocksshould first be sawed from a stick to assume a general outline of the frustum of a cone and with the major and minor axes equal to or slightly in excess of the similar axes of the pattern block.

I Now, with a prime mover such as a motor or gas engine, (not shown) attached to the main shaft 10 by means of the pulleys (which may include a clutch if desired) the main driving shaft 10 is rotated and the worm wheel 14 mounted thereon rotates one of the vertical shafts 12 through its worm 13 which in turn rotates the cross shaft 11, and this shaft communicates the motion and power to a separate vertical shaft 12 and that shaft in turn rotates the carriage rail 4 by means ofthe worm-wheel lt associated with the rail 4 for the purpose.

While worms and worm-wheels are herein specified it is for the purpose of showing only that the mechanism associated with the turning of the block is to be provided with a slow motion and hence, other means may beused if desired. This reduction of speed is done primarily to give relatively slow motion to the pattern block so that the movement imparted to the pilot wheel thereby will be uniform and accurate.

On the other hand the carriage also has a slow (reciprocating) movement, and by means of an independent motor mounted thereon and suitably connected to the tool shaft a high speed may be obtained and imparted to the cutting tools whereby those tools may function properly to work the blocks to a form corresponding to the pattern form during the course of operation.

The blocks now being sawed to the proper shape they are slidably inserted into the chute, the chute now having an inclined position for the purpose of bringing the block to the initial position, preparatory to turning,

By referring to Fig. 1 it will be noted that the pattern forms have a projecting surface in excess of the width of the block and this surface provides a support for the pilot wheel to maintain the cutting tools in a position free of contacting any metal parts when these cutting tools have reached the maximum reciprocating movement. By this means the cut ting tools may operate on the blocks either from right'to leftor left to right, as desired by the operator, although it will probably be found advantageous to start the turning operation on the apex of the block and move thence to the base.

lVith the blocks now inserted and with the cutting tools in position shown in 1 it will now be assumed that the hopper is retiring. As the hopper retires the arms 53 release the pattern form at the moment the spur centers seize the block and at this moment the driving clutch is engaged and the blocks and the pattern forms begin their uniform rotation.

From this moment the carriage will proceed to the right and the cutting tools will engage the blocks in conformity to the contour of the pattern form, the tools rising and lowering to travel as guided by the pilot wheel, until finished as shown in Fig. t, with the pilot wheel resting on the projecting surface of the pattern form.

It is now plain that with this method of guiding the tools and with the movement of the block synchronized with the movement of the tool that the finished block Will be identical in general outline to that of the form.

It is now evident that the length of the machine and the number ofcentering units and cutting tools have no limit except the limit of economical construction.

By referring to Fig. 2 the dotted lines represent the retired position of the hopper and 66 represents a discharge chute into which the turned blocks will drop as they are released from the spur centers.

Obviously the blocks will be severed in two, and finishing will be completed out ofthe machine.

Having thus claim:

1. An automatic block turning machine comprising a frame, a carriage rockably mounted on said frame, a main driving shaft rotatably mounted in said frame, means associated with the main driving shaft to reciprocate said carriage, atool shaft mounted on said carriage and provided with cutting tools, a pilot wheel carried by said carriage, a plat rality of centering mechanisms supportedby said frame, spur centers rotatably and slid ably mounted in said mechanisms, means to advance or retract said centers simultaneour- 1y, means to rotate said centers, pattern form holding centers mounted on said frame and aligned and rotatable with said spur centers, a pattern form mounted in said lastv named centers and positioned to frictionally engage and rotate said pilot wheel to guide the cutting tools to automatically follow the contour of said pattern form, a feeding chute pivotally and adjustably mounted on said frame'and initially positioned with its discharge end interposed between the said spur centers, and means to automatically retire said chute to permit the turning of the block.

2. An automatic block turning machine comprising a frame, a laterally positioned carriage rail rotatably mounted in said frame, a carriage rockably mounted on said rail, a main driving shaft rotatably mounted in said frame, means to automatically reciprocate said carriage, a tool shaft mounted on said carriage and provided with cutting tools, means to independently operate said shaft, a pilot wheel idly mounted on said shaft, a

described my invention I bed formed on said frame, a plurality of centering mechanisms supported by said bed and adapted for laterally spaced adjustment, opposed spur centers rotatably and slidably mounted in said mechanisms, means to automatically advance or retract said centers simultaneously, a clutch controlled driving means associated with the main shaft to rotate said centers, pattern form holding centers mounted on said bed and aligned and rotatable with said spur centers, a pattern form engageable in said form holding cen ters and positioned to frictionally engage and rotate said pilot Wheel to automatically guide the cutting tools to follow the contour of said pattern form, a feeding chute pivotally and adj ustably mounted on said bed and initially positioned with its discharge end interposed between the said spur centers, a laterally positioned cam shaft rotatably mounted in said frame and adapted to automatically retire said chute during the turning of the block, and means associated with the main driving shaft to rotate said cam shaft.

32. An automatic block turning machine comprising a frame, a laterally positioned carriage rail rotatably mounted in said frame, a carriage rockably mounted on said rail, a main driving shaft rotatably mounted in said frame, means to automatically reciprocate said carriage, turning tools mounted on said carriage, means tofoperate said tools independent of the machine, a pilot wheel idly mounted on said carriage, a bed formed on said frame, a plurality of centering mechanisms supported by said bed and adapted for laterally spaced adjustment, opposed spur centers rotatably and slidably mounted in said mechanisms, means to advance or retract said centers automatically with the reciprocating movement of said cutting tools, a clutch controlled driving means associated with the main driving shaft to rotate said centers, a pattern form holding spur center mounted on said bed and aligned and rotatable with the spur centers of the centering mechanisms, and a manually adjustable wood center aligned to rotatably support a pattern form, said pattern form being located to frictionally engage and rotate said pilot wheel to automatically guide the cutting tools to follow the contour of said pattern form, a cam operated feeding chute pivotally and adjustably mounted on said bed andinitially positioned with itsdischarge end interposed between the spur centers of adjacent mechanisms, a laterally positioned cam shaft rotatably mounted on said frame and adapted to automatically retire said chute during the turning of the block, and means associated with the main driving shaft to rotate said cam shaft.

4:. An automatic block turning machine comprising a frame, a laterally positioned carriage rail rotatably mounted in said frame, a counter balanced tool carriage reciprocally and rockably mounted on said rail, a main driving shaft rotatably mounted in said frame, a cross shaft connected'with the said tools independent of machine, a pilot 0Q wheel idly mounted on said tool shaft, a bed formed on said frame, a plurality of Gen tering mechanisms supportedby said bed and adapted for laterally spaced adjustment,

opposed spur centersyrotatably and slidably mounted in said mechanisms, a shifting means operable with the reciprocating carriageto automatically advance or retract, and stop the rotation of said centers, a clutch controlled driving means associated with the 1;;

main driving shaft to rotate said centers, a form holding spur center mounted on said bed and allgned and rotatable with the spur centers of the centering mechanisms and a manually adjustable wood center aligned to rotatably support a pattern form, said pa" tern form being located to frictionally engage and rotate said pilotwheel to'automatically guide the cutting tools to follow the contour of said pattern form, acam operated feeding chute pivotally and adjustably mounted on said bed and initially positioned with its discharge end interposed between the spur centers of adjacent mechanisms, means operable withthe shifting means to control the retiring action of said chute and means to automatically retire said chute during the turning of the block.

5. An automaticblock turning machine comprising a frame, a laterally positioned carriage rail rotatably mounted in said frame, a tool carriage reciprocally and rockably mounted on said rail, aimain driving shaft rotatably mounted in said frame, means associated with said rail to automatically re ciprocate said carriage, a tool shaft mounted on said carriage and provided with cutting tools, means to operate said tool shaft independent of said machine, a pilot wheel idly mounted on said tool shaft, a bed formed on said frame, a, plurality of centering mechanisms supported by said bed and adapted for laterally spaced adjustment, opposed spur centers rotatably and slidably mounted in said mechanisms, leversmounted on said centering mechanisms and operable with reciprocating movement of said carriage to provide a shifting means to automatically advance or retract, and start or stop the rotation of said centers with the movement of said shifting means, a form holding spur cen ter mounted on said bed and aligned androtatable with the spur centers of the centering mechanisms, and a manually adjustable wood center aligned to rotatably support a patter form, said pattern form being located foo to-frictionally engage and rotate said pilot wheel to automatically guide the cutting tools to follow the contour of said pattern form, a cam operated feeding chute pivotallyi and adjustably mounted on said bed and initially positioned with its discharge end interposed between the spur centers of adjacent mechanisms, clutch operated cams positioned in operable contiguity vwith the respective chutes and operable with the shifting means to automatically retire and restore said chutes to their initial positions.

6. An automatic block turning machine comprising a frame, a laterally positioned carriage rail rotatably mounted in said frame, a tool carriage reciprocally and rockably mounted on said rail, a main driving shaft rotatably mounted in said frame, an automatic reciprocating mechanism attached to said carriage, a tool shaft mounted on said carriage and provided with cutting tools, adjustably positioned shifting collars mounted on said shaft, means mounted on said carriage to operate said tools independent of said machine, a pilot wheel idly mounted on said tool shaft, a bed formed on said frame, a multiplicity of'centering mechanisms supported by and adapted for laterally spaced adjustment on said bed, and provided with opposed spur centers rotatably and slidably mounted therein, a shifting means for said centers comprising levers mounted on the centering mechanisms and operable with the shifting collars to automatically advance or retract said centers, means attached to said levers to stop or 'start the rotation of said centers with the respective movement of said shifting means, form holding centers adjustably mounted on said bed in, aligned and rotatable association with the centering mechanisms, a pattern form carried by said last named centers and adapted to frictionally engage and rotate said pilot wheel" to raise and lower thetool shaft to guide the cutting tools in a path identical with the contour of said pattern form, an automatr cally retirable cam operated feeding chute pivotally and adjustably mounted on said bed and initially positioned with its discharge end interposed between the spur'centers of adjacent mechanisms, and means to control the rotation of said cams in synchronized relation to the rotating means of said centers.

7 An automatic block turning machine comprising a frame,a laterally positioned carriage railrotatably mounted in said frame, a tool carriage reciprocally and rockably mounted on said rail, a main driving shaft rotatably mounted in saidframe, segments operably attached to said carriage and associated with said rail to automatically reciprocate said carriage, a tool shaft mountedon said carriage and provided with cutting tools, adjustably positioned shifting collars mounted on said shaft, means mounted on said carsaid machine, a pilot wheel idly mounted on said tool shaft, a bed formed on said frame, a multiplicity of centering mechanisms supported'by andadapted for laterally spaced adjustment on said bed, and provided with opposed spur centers rotatably and slidably mounted therein, a shifting means for said centers comprising levers mounted on the centering mechanisms and operable with the shifting collars to automatically advance or retract said centers, means to automatically rotate or stop the rotation of said centers with the advancing or retracting movement respec- 'riage to operate said tools independent of.

tively of said centers, form holding centers adjustably mounted on said bed in aligned and rotatable relation with the centering mechanisms, a pattern form carried by said last named centers and adapted to frictionally engage and rotate said pilot Wheel to raise and lower the tool shaft wherewith to guide the cutting tools in a path identical to the contour of saidpattern form, an automatically retirable feeding chute pivotally and adjustably mounted on said bed and initially positioned with its discharge end interposed between the spur centers of adjacent mech anisms, clutch controlled cams positioned in operable contiguity with the respective chutes and a bell crank operably mounted on the clutch and operable by means of the shifting levers to automatically control the movement of said chute insynchronized relation to the rotating means of said centers.

comprising a frame, a laterally positioned carriage rail rotatably mounted in said frame, a tool carriage reciprocally and rockably mounted'on said rail, a main driving shaft rotatably mounted in said frame, segments operably attached to said carriage and associated with said rail to automatically reciprocate said carriage, a tool shaft mounted on said carriage and provided with cutting tools, adjustably positioned shifting collars mounted on said shaft, means mounted on said carriage to operate said tools independ ent of said machine, a pilot wheel idly mount-e ed on said tool shaft, 21 bed formed on said frame, a multiplicity of centering mechanisms supported by and adapted for laterally spaced adjustment on said bed, and provided 8. An automatic block turning machine with opposed spur centers rotatably and,

slidably mounted therein, a shiftingmeans for said centers comprising levers mounted on the centering mechanisms and operable with the shifting collars to automatically advance or retract said centers, a bell crank attached to said levers and associated with a clutch to stop or start therotation of said centers with the respective movement of said levers, form holding centers adjustably mounted on said bed in aligned and rotatable relation with the centering mechanisms, a

pattern form carried by said last named centers and adapted to frictionally engage and rotate said pilot Wheel to raise and lower the tool shaft wherewith to guide the cutting tools in a path identical to the contour of said pattern form, an automatically retirable feeding chute pivotally and adjustably mounted on said bed and initially positioned with its discharge end interposed between the spur centers of adjacent mechanisms, and a laterally positioned cam shaft rotatably mounted in said frame and provided with cams positioned in operable contiguity with the respective chutes and adapted to retire said chute during the turning of the block in sychronized relation with the rotating means of said centers.

9. An automatic block turning machine comprising a frame, and the combination of a laterally positioned carriage rail rotatably mounted in said frame, a tool carriage reciprocally and rockably mounted on said rail, a main driving shaftrotatably mounted in said frame, segments opera-bly attached to said carriage and associated with said rail to automatically reciprocate said carriage, a tool shaft mounted on said carriage and provided with cutting tools, adjustably positioned shifting collars mounted on said shaft, means mounted on said carriage to operate said tools independent of said machine, a

pilot wheel idly mounted on said tool shaft,,

a bed formed on said frame, a multiplicity of centering mechanisms supported by and adapted for laterally spaced adjustment on said bed, and provided with opposed spur centers rotatably and slidably mounted there- I in, a shifting means for said centers comprising levers mounted on the centering mechanisms and operable with theshifting collars to automatically advance or retract said centers, a bell crank attached to said levers and associated with a clutch to stop or start the rotation of said centers with the respective movement of said levers, form holding centers adjustably mounted on said bed in aligned and rotatable relation with the centering mechanisms, a pattern form carried by said last named centers and adapted to frictionally engage and rotate said pilot wheel to raise or lower the tool shaft where- With to guide the cutting tools in a path identical to the contour of said pattern form, an automatically retirable feeding chute ivotally and adjustably mounted on said ed and initially positioned with its discharge end interposed between the spur centers of adjacent mechanisms, a stop on said chute, means to automatically hold the oncoming blocks during the turning-operation, means to adjust said hopper to other forms of blocks, anda laterally positioned cam shaft rotatably mounted in said frame and provided with cams positioned in operable contiguity with the respective chutes and adapted to retire said chutes during the turning of the block in synchronized relation with the rotating means of said centers.

10. An automatic block turning machine comprising a frame, and the combination of a laterally positioned carriage rail rotatably mounted in said frame, a tool carriage reciprocally and rockably mounted on said rail, a main driving shaft rotatably mounted in said frame, segments operably attached to said carriage and associated with said rail to automatically reciprocate said carriage, a tool shaft mounted on said carriage to operate said tools independent of said machine, a pilot wheel idly mounted on said tool shaft, a bed formed on said frame, a multiplicity of centering mechanisms supported by and adapted for laterally spaced adjustment on said bed, and provided with opposed spur centers rotatably and slidably mounted therein, a shifting means for said centers comprising levers mounted on the centering mechanisms and operable with the shifting collars to auto matically advance or retract said centers, a bell crank attached to said levers and associated with a clutch to stop or start the rot-ation of said centers with the respective movement of said levers, form holding centers adjustably mounted on said bed in aligned and rota-table relation with the centering mechanisms, a pattern form carried by said last named centers and adapted to frictionally engage and rotate said pilot wheel to raise or lower the tool shaft wherewith to guide the cutting tools in a path identical to the contour of said pattern form, an automatically retirable feeding chute pivotally and adjust-ably mounted on said bed and initially positioned with its discharge end interposed between the spur centers of adjacent mechanisms, means attached to and movable with said chute and adapted to engage the pattern form to maintain that member in angular alignment with the initial position of said block.

In testimony whereof I aliiX my signature.

CARL G. WERNMARK.

Images