US1341818A - Grinding-machine - Google Patents

Description

Patented June 1,1920.

3 SHEETS-SHEET 2.

Men for [for]; qys.

0- ,ON'SRUD.

GRINDING MACHINE.

. APPLICATION FILED JU.NE23, 1919.

" Patented June'l, 1920;

3 SHEETS-SHEET 3- oscnn onsnun, or'cnicneo, nsnniois.

enmnme-nncnmn. I

- Specification of Letters Patent.

Patented June 1, 1920.v

- Application flledjlune' 2a, 1919. Serial No. 506,074.

To all it may -concern: Be it known that I, OscAR Onsnm), a c1t1- zen of the United States of America, and a I resident of Chicago, county of Cook, and 5 State of Illinois, have invented'certain new and useful Improvements in Grinding-Machines, of which the. following is a specifi- I cation.

This invention relates to that class of aulo'tomatic -machinery wherein the I work 'is placed in a holder and moved relatively of a tool so that,said work is cut, shaped, or otherwise acted upon by said tool; I

The main objects of this invention are to provide an improved machine of this kind having an improved arrangement of the tool and the driving means therefor; to provide improved means for controlling the supply of power to the tool-operating motor so as to minimize as'much as possible the con sumption of power; to provide an improved construction and arrangement of the work support; to prov de lmproved means" forclamping the work in 'place during the action of the tool thereon; to provide im- I proved means for effecting the discharge of the completed article and feeding the work;

to provide improved mechanism for advancing the work .on the worksupport to compensate for the wearing away of. the

tool and thereby insure the complete operation of the tool upon the work at all times and to provide an improved construction and arrangement of means for reciprocating the work and controlling the clamping means. I

An illustrative embodiment of this invention is shown in the accompanying drawin s, in which-- "igure 1 is a longitudinal vertical sec- 40 Itional elevation of an improved machine constructed in accordance with this invention. v Fig. 2 is a transverse vertical sectional elevation of the same taken on theline 2- -2 of Fi .1.

. Fig.3 is a top .plan of the improved machine. I

Fig. 4 is a front elevation of the work clamping means and adjacent parts,

Fig. 5' is an enlarged detail of the take; up mechanism. J I Fig. 6 is a fragmentary sectional detail showing the arrangement of air and liquid passages in the work support. 56 Fig 7 is a detail view of the valve mechagovernor 14 which functions in the usual nism which controls the air to the turbine and to the air blast respectively. I

Fig. 8 is an enlarged fragmentar front elevation of one pair ofjaws showing the arrangement of the mechanical discharging 60 device for the finished article. I

Fig. 9 is a lan of the same.

In the specific embodiment herein shown, the machine comprises a frame A whereupon is mounted a tool-operating mechanism B anda work supportC, which are operated, as will more fully hereinafter-appear, for the purpose of causing a metal rod carried by the work su port to be cut into thin disks. Although the machine i1lus-' trated is Y generally known as a grinder, it

will be understood that the improvements are capable of being applied to other mar chines. I Y I I I The frame A is shown in the drawings to be a hollow pedestal 1 integrally formed on a base 2, to which a bracket 3 is attached for supporting the tool-operating mechanism B and the upper end of'which'is shaped to provide a bed plate 4 upon which the work sup port C is reciprocatlngly mounted.

The tool operating mechanism B comprises a tool 10 carried by a vertically dis posed shaft 5 journaled in a bearing .6

formed on the bracket .3 and rotated by a motor D. 'The tool is=1herein shown as an preferably an air turbine of the type shown .in' the Ross and Ons'rud Patent No. 1,244,247, issued October 23, 1917. Such ,a motor. com- I prises a rotor 11 journaled in a casing 12 I and having a plurality of air-jets 13 angularly arranged around said casing for the purpose of directing 'ets-of air against the vanes of the rotor. he delivery ofair to the motor is auto atically-controlled, as will more fully hereinafter be explained.

In order to maintain a more or less constant speed for the tool,-the shaft 5, belowj the turbine,jis connected to "a centrifugal manner. p z

The work support 0 comprises a pair of relatively adjustable parts'15 and 16, one of. which carries a work. holder 19 and clamp-- ing means 'for holding the workin place,

and alsora take up mechanism adapted, I

to advance the work on the support so as to compensate for the wearing awayof the tool.

The part 16 is of I-shaped cross-section,

and "the lower. portion fits with and slides upon the bed plate 4 for the purpose of enablin'g the work to be shifted back and forthwith respect to the tool. The part is of substantially T-shaped cross-section,

with the stem part slidingly fitting on the upper portion of the part 16 The reciprocation of the work support is effected by means of a cam 17 secured to a shaft 18 rotatably mounted within the pedestal of the frame A and a spring 17.1 and lever 17.2 also mounted in said pedestal. The

'cam 17 bears upon a roller 18.1 journaled on a pin 18.2 rigidly secured to the part 16 and is adapted to urge the work support outwardly against the action (if the spring 17 .1.

' The lever 17.2 bears, at its middle part,

- against the pin 18.2 above the roller 18.1 and has one end resting upon the pedestal 1 and the other end connected to the spring 17.1.

Through the coaction of the spring 17 .1 and lever 17 .2, the work support is normally urged rearwardly on the bed plate 4 as permitted by the cam 17.

The work holder 19'is mounted on the forward end of the support C in a vertically disposed position and is adapted tohave the work fed therealongby means of gravity. A stop 20 is arranged below the holder in alinement therewith, against which" the workabuts for limiting its feeding movement. The stop consists of a bolt 21 threadingly mounted in the lug 22 and adapted to 'be secured in place by a lock nut 23.

holder 19. The pairs of jaws are spaced spectively, 'pivotally mounted at 34, whereby apart vertically'a distance. slightly more than thethickness of the tool, which in this case-is the emery disk 10, so that said pairs of jaws grip the work on opposite sides of the point 11 on which the tool operates. The

jaws 24 an 26 are shiftabl mounted;on the work support so as to be adjusted bythe adjusting screws 28 and 29 respectively,'and be fixed n their adjusted positions by stud bolts 30 and 31 respectively. The jaws 25 and 27 are secured to blocks 32 and 33 re said jaws are adapted to be swung toward and away from the fixed jaws 24 and 26 for the urpose of clamping or releasing both so the nished article and the work.

The shifting'of'thejaws 25 and 27 is controlled by a pair of arms 35 and 36', levers 37 iand 38, levers 37.1 and 38.1, and cams 39 and 40 respectivelyThe arms 35 and 36 are secured at their forward ends to the I blocks 32 and 33 respectively and have their rearward ends slidingly Ybearing upon spring-pressed pins 41 and 42 mounted on a bracket 43 secured to the side of the frame A. The spring-pressed pins 41 and 42 normally' urge the arms 35 and 36 inwardly as maybe permitted by the cams 39 and 40,

which serves to open the jaws 25 and 27.

The levers 37 and 38 are concentrically mounted upon a'shaft 44 journaled on the bracket 43-, and by'means of concentrically mounted sleeves are connected to the levers 37.1 and-38.1 respectively. The

levers 37 and 38 have rollers 37.2 and 38.2'

against the action of the spring-pressed pins 4l and 42, and thereby urge the jaws into position to clamp the work, and during another part of their rotation will permit the spring-pressed pins 41 and 42 to retract the arms 35 and 36 so as to shift the j aws25 and 27 into their retracted positions for releasing the work. The relative shape and arrangement of the camsq39and 40 are such that the jaw 25 is retracted slightly in advance of the retraction of the jaw 27, so as to enable the finished article to be released'and discharged before the work is released by the jaws 26 and 27 forthe purpose of being advanced reliminary'to a further operation.

For the piirpose of facilitating the discharge of the finished article from the work support after it has been released by the levers 37.1 and 38.1 andthelevers 37 and 38'to normally urge the arms 35' and 36 outwardly clamping jaws 24 and 25, an air blastand a may be used as occasion may demand, which maybe replaced or supplemented by amechanical discharge.

The air blast comprises a channel 45 leading inwardlyjrom theside of the part 15 of the worksupport C and then forwardly as at 45.1, openin 'r'earwardly of the'jaws 24, 25, 26, and 2 in alinement with the i space between the opposed faces of said jaws. The supply of air to the air blast'is controlled by an automatically operated valve mechanism more fully hereinafter described.

"The liquid spray comprises ,a tank 48 mounted on a stem 49 above the work support C and has a tube 50 leading therefrom andconnecting with a T-fitting 47 secured to the .part 15'of the work support C so as to communicate with achannel 51 -(see Fig. 6) formed therein and having a branch 51.1

-' opening directly behind'the jaws 24, 5, 26,

and 27. A second branch of the liqui spray comprises a nozzle 46 (see Fig. 3") supported on the T.-fitting. 47 and having the end thereof located forwardly of the jaws 24, 25, 26, and 27 and to .one .side of the work so that a jet of liquid issuing therefrom is of the nozzle 46 simultaneously. During the operation of the tool upon the work, the liquid serves to cool the same, but when the part has been severed. from the work and .the tool retracted, the jets ofliquid have sufficient force to ,wash the finishedarticle ofl:' from the stop 20, upon its being released by .the jaws 24 and 25. A valve 52 is arranged in the tube for the purpose of controlling the flow of liquid from the tank 48. Some kinds of work require the use of liquid for cooling the same, and at such times the airblast is not used. Where, how'- gever, the work does not require the use of li%id, air is used. he mechanical discharge comprises a piece of very thin metal (about .002 of an' inch) bent in the form of an angle plate 20.1 and secured to the jaw 25 by the bolt which secures said jaw to the block 32. A hook 20.2 extends outwardly from the plate 20.1 to the rear of the work and across onto the jaw 24. The curvature of this hook is it runs off from theclamping means and adjacent parts. A drain 54 is arranged at one corner of the tray, from which a tube or pipe 55'leads to a small centrifu al pump (not shown) by means of which the. liquid is returned to the tank 48. This-tray also catches the finished articles as they are discharged from the work support.

The take-up mechanism for advancing the work toward the tool to compensate for 55.

wear of the tool comprises primarily an adjusting screw .member 56, an oscillating member 57, and a cam 58. The threaded screw member .56 is swiveledto the part 15,

and has threaded connection with-a nut 59 rigidly secured to the part 16 so that'the rotation of said threaded member in'one direction or the other'c'auses a corresponding' relative shifting of the parts 15 and 16.

' The oscillating member'57 is journaled on the screw member 56 beyond the end of the Liquid is. avity to .the T-fitting 47 from part 15 and is provided with pawls.60, 61,

and 62, which are adapted to coact with a 'ratchet 63 secured to said screw member.

member 57, which is likely to be less than the angularity of the teeth on said ratchet. The pawls 60,61, and 62 are normally urged into. contact with the ratchet by counterweights 64, 65 and 66 respectively, integrally secured thereto. I

In order to enable the pawls to'be retracted so as to discontinue the rotation of the threaded bolt after the members 15 and 16 have been relatively shifted to a predetermined extent or to allow the threaded member to be rotated for the purpose of resetting theparts 15 and 16, a rod 67 is shift-.

ably mounted on the oscillating member 57 and has a pin 68 at the lower end, which, y

when the rod is. urged upwardly by the spring 69, is adapted to elevate the counterweight 64 of the awl 60. Shoulders 70 and 71 on the coun erweights 64 and 65 are thereupon adapted to coact with the counter- Weights 65 and 66 respectively for elevating the same and retracting the corresponding pawls 61 and 62. The rod 67 is held in its depressed position by means of a pawl or finger 72 pivoted at 73 on the oscillating member 57 so as to engage a notch 74 formed in the side of the rod 67.

The finger or pawl -72 is normally urged by a spring 75 (see'Fig. 1) embracing a shaft 76 which carries said finger, into p'osition to engage the notch 74 for holding the rod 67 in its depressed position. The retraction of the finger 72 for the purpose of releasing the rod 67 ma be effected either manually or automation] y. To this end, an

L-shaped lever 77 is secured to the shaft 76,

the arm 77.1- of which extends upwardly andby which one'ma swing the finger 72 out of engagement wit the notch 74. A set screw 78 is secured to the other arm ofthe lever 77 so that the lower end of said set screw is opposed to and by ad'ustment may bear upon the upper f aceo'f t e part 15 of said work support 0. A look nut 79 secures the set screw in proper positionin the lever 77. After the oscillating member 57 has been advanced .to a certain angular extent bythe action. of the cam 58, as will,

more fully hereinafter appear, the contact of the end of the set screw 78 with the upper face of the part" 15 causes the finger 72 to be retracted .from the notch 74 so as to release the rod 67.

The oscillation'ofthe-member 57 is' effected by means of a roller 80 journaled on a pin 8.1 secured to the oscillating member 57, which roller operates in the elongated Y cam 58 secured to the rear end of the regard to its longitudinal dimension, the

estal 1.

center of curvature being the axis of the screw member 56. Said cam is supported in such a wa as to be adjusted in a horipedeszontal plane or the purpose'of varying theangularity thereof with respect to the direction of movement of the reciprocating work ,support G and thereby vary the degreeoi oscillation of the member 57.

A hand wheel 82 is secured to the rear.

end of the screw member 56 by means of which said member may be turned independently of the automatic operation thereof effected by the oscillating member 57.

The supply of air to the turbine, which operates the tool, and to the airblast, is controlled by valve mechanisms 83 and 84 (see Fig. 7 secured to the sides of the ped- At one side these valves are connected to a pipe 85 leading to a sourceof air supply, and at the other sides are connected by pipes 86 (see Fig. 3) and 87 leading to the turbine D and the channel respectively. These valve mechanisms are practically the same. in construction, each comprising a casing-88 (see Fig. 2) having a channel leading therethrough for the purpose of providing communication between .the pipe 85 and the pipes .86 and 87 respectively, which communic tion is controlled by a valve 89 normally urged by a spring 90 into its closed position.

v Levers 91 and 92 are p1voted-v on the pedestal 1 on a common axis 93 so'that one end of each of said levers is directly above and adjacent to the upper ends of the valve stems of the respective valve mechanisms 83 and 84. The other ends of the levers 91 and 92 extend into the pedestal 1 and are adapted,'through the medium of pins 91.1,

and 92.1, to engage a cam 94 secured to the shaft 18. The cam 94 is grooved in its upper face for a part of its circumference so that during apart of its angular movement it is adapted to allow the valvemechanisms 83 and 84 to be closed, and during another carries a cone-pulley 98 and which 'is adapted to be connected by a belt (not shown) with asuitable source of power. Suitable clutch mechanism 99 is arranged between the cone-pulley 98 and the shaft ley may be connected in driving relation with the machine, as may be desired.

The operation of the device, herein shown 'is substantially as follows:

Assume that the parts are all assembled and properly connected so that the machine is in operation. The emery disk 10 is rotated'at a very high rate of speed by the turbine. As the-shaft 18 rotates, the cam 17 acting on the roller 18.1, causes the work support- C to move forwardly toward the engages the work.

tool. As the work support starts its forward movement, the cam 94, acting on the lever 91, opens the valve mechanism 83, and

air is admitted to. the turbine so'as to bring i upon which it is mounted, so'that said pulit up to'normal speed before the tool en'- gages the work, and keep the air pressure supplied-to said turbine so long as the tool instantaneously with the commencement of said return movement, the cams 39 and-4O,

acting on the levers 37.1, 38.1, 37,"and 38,

permit thespring-pressed pins 41 and 42 toshift first the arm 35 and then the arm 36.

The shifting of the arm 35 retracts the clamping jaw 25 so that the-finished article is released.

At the instant the jaw 25; is retracted, the cam 94, acting on the lever 92, actuates the val've mechanism "84 so .that air is' admitted part of itsangular movement to open said valve mechanisms. The arrangement. of the cam. and levers is such that the opening of the valvemechanism 83 will occur during the time that the work is being moved to-.

wardthe. tool an operated .upon. The opening of the va ve mechanism 84 will occur simultaneously with the retraction of the work-clamping means, so I that the 'air jet issuing from the channel 451- will discharge the finished article'from the stop 20 a u on its release by the-jaws 24 and 25.

he shaft 18 is ournaled in suitablebearings in the pedestal 1 and at its lower end carries .a gear which meshes with a worm 96 carried on the shaft 97, which in turn finished article from the clamping jaws 24,

and 25- and the stop 20, the arm 36 is shifted so as to retract the jaw 27, whereupon the work is released and is allowed to move by gravity downward through the holder to abut against. the stop 20. As soon as the feeding of the work has been completed, the

cams 39 and 40,-acting on the levers 37.1,

38.1, 37, and 38, shift the arms 35 and 36 against the action of the spring-pressed pins and move the jaws 25 and 27 into position to clamp the work at both sidesof the point at which it is operated'uponby the emery disk, and the work support is again ready to ing the part from the work, the cam 94 allows the lever 91 to be retracted under the action of the spring 90, so that the valve mechanism 83 is closed and air is cut off from the turbine until the work support again starts its forward movement. The turbine, operating at the high speed which it does, and being. required to do no work while the air is cutoff, does not materially reduce its speed during the time that the air supplyis cut ofl".

During the forward movement of the work support C, the roller 80, operating in cam 58, causes the member 57 to oscillate slightly, whereupon one or the other of the pawls 60, 61, and 62, acting on the ratchet 63, causes the screw member 57 to shift the part 15 forwardly on the part 16 and bring the work a'little nearer to the tool. During each reciprocation of the work support there is a corresponding oscillation of the member 57 and a consequent relative shifting of the members 15 and 16, the result -of which is to move the work closer. to the tool a sufficient distance to compensate for the wearing away thereof.

It is of course necessary to check the relative shifting of the parts 15 and 16before they have been moved a sufficient extent to endanger contact of the tool witli the part 15. Accordingly,'the set screw 78-may be adjusted so that the oscillating member 57, after having been moved to a certain angular extent as the result ofits intermittent oscillations, will cause the end of said set screw to bear upon the upper face of the part 15 in such a way as .to retract the finger 72 and release the rod 67. Upon the rod 67 being released, it is urged upwardly .by the spring 69 so that the pin 62 at the lower end thereof engages the counterweight 64 and shifts it upwardly so as to disengagethe pawl from the ratchet 56. The shifting of the counterweight 64 results in a similar shifting of each of the other counterweights 65 and 66 and a con-' sequent retraction of the pawls 61 and 62. The result is that further reciprocations of the work support, although causing an, oscillationof the member 57, will not rev salt in a rotation of the screw member 56.

Vhen it becomes necessary to insert a new tool, the parts 15 and 16 are relatively shifted back to their normal position, which is effected by turning the hand-wheel '82, after having released the pawls 60, 61, and 62 from engagement with the ratchet 56. If

- retraction of these pawls has not been cffected automatically, in the manner hereinbefore enplained, it'may be done mam ally by simply pulling the lever arm 77 .1

by simply depressing the rod 67 until'the notch 74 thereon has been engagedbythe fin er 72.

' Klthough but one specific embodiment of this invention has been herein shown and described, it will be understood that numerous details of the construction shown may be altered or omitted without departing from the spirit of this. invention as defined by the following claims.

I claim:

1. In a machine of the class described, the combination of a frame, a tool support and a work support mounted thereon, mechanism for shifting said supports relative to each other so as to bring the work into position to be acted upon by the tool, a motor for rotating said tool support, a power-controlling device arranged intermediate said motor and the source of power, and means operated by said support-shifting mechanism for actuating. said controlling device so as to permit the supply f power to said motor only during a certain portion of the relative movement of said supports. 4

2. In a machine of the class described, the combination of a frame, a shaft rotatably -mounted thereon, a tool support carried by said shaft, a work support, a second shaft journaled on said "frame, means'carried by said second shaft for causing the relative reciprocation of said supports, a motor con-- nected to rotate said first-mentioned shaft, a power-controlling device arranged interme-. diate said motor and the source of power, and coacting means on said frame and said second-mentioned shaft adapted to actuate said power-controlling device, whereby power is supplied to said motor only during a portion of the relative movement of said supports.

3. In a machine of the class described,'the

combination of aframe,-a shaft rotatably mounted thereon, a tool support carried by said shaft, a worksupport, a second shaft journa-led on said frame, means carried by said second shaft for causing the relative reciprocation of said supports, a fluid-driven turbine connected to said first-mentioned v shaft, a fluid-controlling device arranged intermediate said turbine and the source of' fluid supply, and coacting means on said frame and said second-mentioned shaft adapted to actuate said device, whereby fluid is supplied to said turbine only during a certain'portion of the relative movement of said'supports.

4. In a machine of the class described, the combination of a frame, a shaft rotatably mounted thereon, a tool support carried by said shaft, a work support, a second shaft journaled on said frame, means carried by said second shaft for causing the relative reciprocation of said supports, an air-driven turbine connected. to said first-mentioned shaft, an air valve, mounted on said frame and interposed between said turbine and the source of air supply, a lever pivoted on said frame, a cam carried by said second-mentioned shaft and coacting with said lever for actuating said valve, whereby air is supplied to said turbine only dur ng a. certain portion of the relative movement of said supports.

5. In a machine of the class described, the combination of a frame, a shaft rotatably mounted thereon, a tool support carried by said shaft, a work support, a second shaft journaled on said frame, means earned by said second shaft for causing the relative reciprocation of said supports, an air-driven -turbine connected to said first-mentioned shaft, an air valve mounted on said, frame and interposed between said turbine and the source of air supply, a spring normally urgingsaid valve to cut off the supply of an to said turbine, a lever pivoted on sald frame adjacentto said valve, a cam earned by" said second-mentioned shaft and coacting with said lever so as to open sa1d valve and permit the delivery of air to said turbine only during a certain portion ofthe relative movement of said supports.

6. In a machine of the class described, the combination of a frame, a tool support and a work support mounted thereon, mechanism for shifting said supports relative to each other so as to bring the work into position to be acted upon by the tool, a motor.

for rotating said tool support, a work holder mounted on said work support and adapted to have the work automatically fed therefrom, a stop for limiting the feeding of said work, pairs of jaws urged to clamp said work at both sides of the point upon which the tool is caused to act, and means for retracting said jaws to permit the discharge of the completed article and the feeding of the work.

7 In a machine of the class described, the combination of a frame, a tool support and a work support mounted thereon, mechanism for shifting said supports relative to each other so as to bring the work intoposition to be acted upon by the tool, a motor for rotating said tool support, a work holder mounted on said work support and'adapted to' have the work automatically fed therefrom, a stop for limitingthe feeding of said work, pairs ofjaws urged to clamp said work at both sides of the point upon which the tool is caused to act, and means for retracting said pairs of jaws in succession whereby the finished article 1s first released to permit it to be discharged from the work" support, and then to release the work to allow it to be fed along said holder. 7 I

8. In a machine of the class descrlbed, the

combination of a frame, a tool support and a work support mounted thereon, mechanism for shiftingsaid supports relative to each other so as to bringpthe work into position to be acted upon by the tool, a-mo-.

. tool, one jawof each 'of said pairs'being fixed and the other j aw of each of said pairs being shiftable, means normally-urging said shiftable jaws into their retracted positions for releasing the .work, and means controlled by said support-shifting I mechanism for shifting said shiftable jaws ,into their clamping positions.

9. In a machine of the class described, the combination of a frame, a shaft rotatably mounted thereon, a tool support carried by said shaft, a work support mounted on said frame, a second shaft journaled on said frame, means carried by said second shaft and adapted tocause the relative reciprocation of said supports, a Work holder mounted on said work support and adapted to have the work automatically fed therefrom, a stop for limiting the feeding of said work, pairs of jaws arranged adjacent to said stop with their opposed faces in alinement. with said work holder and adapted to clamp the,

work at both sides of the point acted upon by the tool, one jaw of each of said pairs being fixed, the other jaw of each of said pairs being pivotally mounted, arms connected to said pivotally mounted. jaws, means normally acting upon said arms so as to retract said pivotally mounted jaws from their clamping positions, levers mounted on said frame and having one end of each hearing upon said arms, and cams carried by said second-mentioned shaft and bearing upon the other ends of said levers, whereby said levers are actuated to cause said arms to shift said pivoted jaws into their clamping positions.

,10. In a machine of the classvdescribed,

the combination of a frame, a shaft rotatably mounted thereon, a tool support carried by said shaft, a work support mounted on said frame, a second shaft journaled on sald frame, means earned by said sec-o 0nd shaft and adapted to cause the relative reciprocation of said supports, a work holder mounted on'said work support and adapted to have the work automatically fed therefrom, a stop for limiting the feeding of said work, pairs of jaws arranged adjacent to said sto with their opposed faces in alinement with said work holder and adapted to clam the work at both sides of the point acte upon by the tool, one jaw of each of said pairs being fixed, the other jaw of each of said pairs being pivotally mounted, arms connected to said pivotally mounted jaws, means normally acting upon said arms so as to retract said pivotally mounted jaws from theirclam in positions, levers mounted onsaid fram an having one end of each bearing upon. saidarms, and cams carried by .and a work support mounted thereon, mechanism for shifting said supports relative to each other so as to bring the work into position to be acted upon by the tool, a motor for rotating said tool support, a work holder mounted on said work support and adapted to have the work automatically fed therefrom, a stop for limiting the feeding of said work, pairs of jaws urged to clamp said work at both sides of the point upon which the tool is caused to act, means for retractingsaid jaws to permit the discharge of the ,completed'article and the feeding of thework, an air blast arranged adjacent to said jaws, a' valve mounted on said frame .and controlling said air blast, a lever pivoted on said frame adjacent to said valve,

and a cam operated by said support-shifting mechanism and .coacting with said lever so as to cause the opening of said valve to permit a jet of air to be directed against the finished article simultaneously with the re- I traction of the respective pair ofjaws.

12. In a machine of theclass described, the combination of a frame, a tool-1 support and a work support mounted thereon, mechanism for shifting said supports relative, to each other so as to bring the work into position to be acted upon by the tool, a motor for rotating said tool support, a work holder mounted on said work support and adapted to have the work autdmatically fed therefrom, a stop for limiting the feeding of said work, pairs of jaws urged to clamp said work at both sides of the point upon which. the tool is caused to act, means for retracting said jaws to permit the discharge of the completed article and the feedingof. the work, an air blast having two separate branches, one in the formof a channel formediinsaid work support and opening at purposeof allowing it toretraction of said jaws.

the back bf said jaw s alinement with the. i 7

space between the same, and the other in the form of a nozzle located in-front of said jaws and disposed at an angle to the axis of said channel, a valve mounted on said frame and controlling said air blast, a lever pivoted on said frame adjacent to said valve, and

a cam operated by said support-shifting mechanism and coactmg with said lever so as to cause the opening of said i alveto per- .mit a jet of air to be directed against the fin-'. ished article simultaneously with the retraction of the respective pair of jaws. 13. In a machine of the class described, the combination of a frame, a tool support and, a work support mounted thereon, mechanism for shifting said supports relative to each otherso as to bring the work into position to be acted upon by the tool, a motor for rotating said tool support, a vertically disposed work holder mounted on saidwork Q i support" and adapted to have the work automatically fed therefrom by gravity, a stop arranged in alinement below said work- 7 holder. and adapted to limit the feeding o jaws arranged adjacent to said stop and urged to clamp said work atT'both sides of ticle and the feeding of the work.

. 14. In a machine of the class described,

the combination of a frame, a' shaft rotatably mounted thereon, a tool support, carried by said shaft, a work support, a second shaft journaled on saidframe, means carried by said second shaft for causing the relative reciprocation of said supports, an air-driven turbine connected to said first-mentioned shaft ,a work holder mounted on said work support and adapted'to have the work; automatically fed therefrom, a stop for limiting f said work, pairs of horizontally disposed the point upon which the tool is caused to act, and means for retracting said jaws to .permit the discharge of the completed arthe feeding of said work, pairs of jaws -urged to clamp said work at both sides of the point upon which the tool is caused to act, means-for retracting saidjaws to permit the discharge of the completed, article and the feeding of the work, anair blast arranged adjacentato said jaws, a -pair of valves mountedon said casing ad acent to each other, one of said valves being interposed between said turbine and the source of air supply, the/other valve being adapted 7 to control the air to said air blast, a 'pair of levers'pivotally' mounted on said frame and adapted to control the respective valves, and a cam carried by said second-mentioned shaft and arranged toshift said levers and thereby actuate said valves so that air is determined part of the relative movement of livered to said turbine only during a prede- Said Supports d a jet of air is projected from said air blast simultaneously with the naled thereon, a tool support carried bysaid 15. In a machine of the class described, the combination of a frame, a shaft (jourshaft, a motor connected to rotate said shaft,

a work support reciprocatingly mounted on "said frame and comprising relatively adjustable parts, a shaft journaleil on said frame, coacting means on said work support and said second-mentioned shaft for causing the support and actuated by the reciprocation of able parts, a shaft journaled on said-frame,

said work support'for rotating said member.

16. In a machine of the class'describe'd, the combination of a frame, a shaft journaled thereon, a tool support carried by said shaft, a motor connectedto rotate said shaft, a work support reciprocatingly mounted on said frame and comprising relatively adjustable parts, a shaft journaled on said frame, coacting means on said work support and said second-mentioned shaft for causing the reciprocation of said work siipport, a rotating member on said'work support adapted to be actuated for causing the relative shifting of said parts, a ratchet carried by said rotating member, an oscillating member mounted on said work support, a, pawlcarried by said oscillating member and arranged to engage said ratchet, and means on said frame engaging said oscillating member and adapted to oscillate the same through the reciprocation of said work support on said frame.

17. In a machine 'of the class described, the combination of a frame, a shaft journaled thereon, a tool support carried by said shaft, a motor connected to rotate said shaft,

a work support reciprocatingly mounted on said frame and comprising relatively adjustcoacting means on said work support and said second-mentioned shaft for causing the reciprocation of said work support, a rotating member on said work support adapted to beactuated for causin ing of said parts, ratcfiet carried by said rotating member, an oscillating member mounted on said-work support, a pawl car-:

riedby said oscillating member and ar ranged to en age said ratchet, a cam mounted on said rame, and a roller carried by said oscillating member and engaging said cam, whereby said oscillating member is oscillated through the reciprocation ,of said work support? lgsaid frame.

1-8. In'a ma ine of the class described,

the combination of a frame, a shaft journaledthereon, a tool sieigport carried by said,

shaft, a motor connect to rotate said shaft, a work support reciprocatingly mounted on said frame and com risin relatively adjustv Mi able parts, a shaft ourn a ed on-said frame,

the relative shifting member on said work support adapted to I be actuated for, causing the relative shifting of said parts, a ratchet carried by said rotatable member, an oscillating member mount- "ed on said work support, a plurality of pawls on said oscillating member and adapted to engage said ratchet, said pawls being of varying lengths so that the angular movement-of said ratchet may be less than the length of a single tooth, and coactin means on said oscillating member and sai ffame, whereby said member is oscillated through the reciprocation of said work support on said frame.

19, In a machine of the class described, the

combination of a frame, a shaft journaled thereon, a tool support carried by said shaft, a motor connected to rotate said' shaft, a Work support reciprocatingly mounted on said frame and comprising relatively adjustable parts, a shaft journaled on said frame, coacting means on said work support and said second-mentioned shaft for causing the reciprocation of said work support, a rotating member on said work support adapted to be actuated for causing the relative shifting of said parts, a ratchet carriedby said rotating member, an oscillating member mounted on said work support, a pawl carried by said oscillating member and arranged to engage said ratchet, a cam mounted on said frame, a roller carried by said oscillating member and engaging said cam, whereby said oscillating member is oscillated through the reciprocation of said work support on said frame, means normally adapted to retract said pawl, a finger normally urged to hold said means in its inoperative position, and coactingshoulders on said finger and said work support adapted .to cause the retraction of said finger at a predetermined point in the relative shift- .ing of said osci Work support.

20. In a machine of the class described, the combination of a'. frame, a shaft jour- -'naled'thereon, a' tool support carried by said shaft,amotor connectedto rotate said shaft,

justable parts, a shaft journaled on said frame,-'coactin means on said work sup- 1'10 lating member and said port and said second-mentioned shaft for. j

causing-the reciprocation of said work sup- .port, a rotating member on said work su port adapted to be actilated for causingt e relative shifting of said parts, a ratchet car-- ried by said rotating member, an oscillating member mountedon said work support, a pawl carried bysaid oscillating member and arranged v to engage said ratchet, a cam mounted-on saidframe, a roller carried by;

said oscillating member and engaging said cam, "whereby said oscillating member is oscillated through the reciprocation of said work support on said frame, a rod shiftably mounted on said oscillating member, a spring normally urging said rod to retract said pawl, a finger adapted to hold said rod in its inoperative position, and coacting shoulders on said finger and said work support adapted to cause the retraction of sald finger at a predetermined point in the relative shifting of said oscillating member and said work support.

21. In a machine of the class described, the combination of a frame, a bearing supported on said frame, a vertically disposed shaft journaled in said bearing, awork support carried by said shaft, a disk-shaped tool mounted in said work support, a motor connected to rotate said shaft, a work support reciprocatingly mounted on said frame, a work holder mounted on said support and adapted to have work fed therefrom, clamplng means for securing said work in position to be acted upon, mechanism for retracting said clamping means to permit'the discharge I of a finished article and the feeding of the .work, a shaft journaled on said frame, co-

acting means on said second-mentioned shaft and on said work support respectively adapted to cause thereciprocation of said work supportso as to move the work toward the tool for the purpose ofhaving sections severed therefrom, and means for retracting said clamping means so as to release the severed section. 1

22. In a machine of the class described, tool support and a work support mounted thereon, mechanism for shifting said supports relative to each other so J as to. bring the work into position to be acted upon by the tool', a motor for rotatin said tool support, a

' work holder mounte on said work support 45 and adapted to havethe work automatically fed therefrom, a stop for limiting the feeding of said work, pairs of jaws urged to clamp said .work at both sides of the point ing of the work,;. and oth charge of thecompleted article and the feeder means adapted to be actuated so as todischarge the completed article from said jaws and'stop.

23. In a machine of the class described, the combination of a frame, a tool support and a. Work support. mounted thereon, mechanism for shifting said supports relative to each other so as to bring the work into position to bc acted upon by the'tool, a motor for rotating said tool support, a Work holder mounted on'said work support and adapted to have the work automatically fed therefrom, a stop for limiting the feeding of said. work, pairs of jaws urged to clamp said work at both sides of the point upon which the tool is caused to act, means for retracting said jaws to permit the discharge of the completed article and the feeding of the work, and other means automati cally actuated with the retraction of said jaws for discharging the completed article from said jaws and stop. I

24. In a machine of the class, described, the combination of a frame, atool support and Work support mounted thereon, mechatherefrom, a stop for! limiting the feeding.

of said work, pairs ofijaws urged toclamp said work at both sides of the point upon which the tool is caused to act, means for retracting said pairs of jaws in successsion whereby the finished article is first released to permit it to be discharged from the work? support, and then to release the work to allow it to befed along said holder,'and a member carried by one of the jaws of said pair which-is first retracted, said member being adapted to discharge the completed article from said pair of jaws and said sto gigned at Chicago this 17th day of'June, 1919.

upon which the tool is caused to act, means for retracting said jaws to permit the dis- P osc iioNsRUnj

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