US1859319A

US1859319A - Machine for cutting bars, pipes, etc.

Info

Publication number: US1859319A
Authority: US
Inventors: Maxwell H Sussman
Original assignee: STEEL AND TUBES Inc
Current assignee: STEEL AND TUBES Inc
Priority date: 1926-10-19
Filing date: 1926-10-19
Publication date: 1932-05-24
Anticipated expiration: 1949-05-24

Description

May Z4, 1932. M. H. SUSSMAN MACHINE FOR CUTTING BARS, PIPES, ETC

4 sheets-sheet 1 Filed OCt. 19, 1926 myn INVENTOR MMA/Lw,

, 97.1* ORNEY-r May 24, 1932- M. H.V sUssMAN 1,859,319

MACHINE FOR CUTTING BARS, PIPES, ETC

Filed OCb, 19, 1926 4 Sheets-Sheet 2 INVENTOR 7K/...Mem W 4 Sheets-Sheet 3 INVENTOR MfS-M M. H. SUSSMAN MACHINE: FOR CUTTING BARS, PIPES, ETC

Filed OC. 19,-1925 May 24, 1932.

May 24. 1932.l yM. H. sUssMAN I 1,859,319

` MACH'INE FOR CUTTING BARS, PIPEs, ETC

Filed Oct. 19, 1926 4 Sheets-Sheet 4 Patented May 24, 1932 UNITED STATES PATENT OFFICE MAXWELL H. SUSSIIAN, OF NEW YORK, N. Y., ASSIGNOR, BY MESNE ASSIGNMENTS, TO STEEL AND TUBES, INC., A CORPORATION OF OHIO Application tiled October 19, 1926. Serial No. 142,536

My invention relates to machines for cutting bars, pipes and other (usually) lengthy articles, either servering the saine into pieces of appropriate length, or making cuts of other kinds, simple or complex, and particularly for performing such operationswhile the article is traveling. The invention 1s especially intended for mechanisms for conjoint use with machines in which the articles operated on are formed or. otherwlse treated, in which connection the desired cuts can be made as the article or articles emerge from the machine treating the article and without interrupting the continuity of the treating operation. It will be apparent, however, that my invention may be'used in other situations.

The object of my invention is to vimprove machines of the kind indicated in various ways, particularly to the end of simplication, eliminating the customary bed plate, eliminating elements customarlly devoted solely to guiding the tool carriage, providing a more open construction of the machine,

l whereby inspection, adjustment and repairs are more readily effected, providing a machine requiring less attention from the operator and in instances dispensing with an operator, the machine delivering the cut pieces automatically without theservices of an attendant, and providing a machine suitable for cutting'small sizes and also for cutting work of large cross dimensions and consequently so heavy as to be handled manually with difficulty. These and other accomplishments of my invention will appear from the matter hereinafter.

The accompanying drawings illustrate a machine for severing pipe, bars, etc., embodying my invention. Fig. 1 is a diagrammat-ic elevation of the entire machine, the electrical control circuits also being shown diagrammatically and the tool in its retracted at-i'est position. Fig. 2 is asectional elevation of the delivery mechanism substantially on the line II-II of Fig. l. Fig. 3 is an elevation partly in'section of the portion of the machine of Fig. 1 adjacent the cutting "tool showing this portion. in greater detail V| and the tool at about its position at the coinpletion of a cut. Fig. 4 is a plan view of the same portion of the mechanism. Fig. 5 is an end elevation of the machine, looking from the left of Figs. 1, 3 and 4, a part being broken away, and the tool retracted. Fig.46 is an end elevation of the same portion of the machine as Fig. 3, looking from the right of that figure, a part of the mechanisinbeing broken away and the tool depressed.

In the machine illustrated, the work (indicated by the pipe or tube 35) is assumed to be driven longitudinally from left to ri ht in Figs. 1, 3 and 4, by external means; or eX- ample, the driving means may be the machine in which the work is fabricated. The cutting portion of the machine illustrated has two end frame members, 1 and 2, which may comprise or have legs resting on the floor and which are transverse to and joined by four

bars

5, 5,

6, 6, laid substantially parallel to the direction of movement of the work. These bars lie in two or more pla-nes and together with the

frame members

1 and 2 form the framework of the cutting portion of the machine and outline a three-dimension space quite open and accessible. In this open and accessible space much of the mechanism is (ifi mounted. The main motive power of the machine is furnished by an electric motor 7 supported by the frame member 1. This motor runs constantly while the machine is in operation and through a small reducing gear 8 on its shaft and chain 9 drives a larger gear at 10 fixed on the shaft 11 extending across the top of thev machine. A worm 12 is fixed to this lay shaft 11 and meshes with the gear 13 fixed to the short longitudinal shaft 14 which has a clutch 16 to connect the shaft 14 to a gear 15. The clutch 16 is closed to drive the gear 15 by means of the lever 17 as the latter is actuated by the armature 18 of a solenoid 19, and furthermore, is of the kind which, when once closed by a pull of the armature 18 on the lever 17, remains closed until the gear 15 completes a whole rotation and then automaticall)1 opens to disconnect the gear 15. The gear 15 meshes with and drives a gear 25 fixed to the long shaft 26 extending lengthwise of the machine at its top; at its opposite end the long shaft 26has fixed to it a gear t f 27 like the gear 25, and these two gears 25 and v27 mesh respectively with gears 28 and- 29 which are fixed respectively to the

short shafts

30 and 31 carryin the

discs

32 and 33. Between the edges o the discs is a long extended bar 34 constituting the wrist or pin of a crank from which the cutting tool is hung as later described. This crank lowers an raises the cutting tool, to and from the work, to make a cut and return the tool each time the clutch 16 is closed and the crank is thereby revolved once by the motor 7 through the connection indicated. In addition to this motion of the tool to and from the work, the tool also moves to the right from its position in Fig. 1 while making a out, traveling alon the crank 34 with the work as later describe It is returned again to theleft by the chain belt 48. For drlving this belt the end of the worm shaft 11 opposite the gear 10, is provided with a small gear at 39 which drives a chain 40 going to a larger gear at 41 carried by a stub shaft 42, and a gear 43 on this stub shaft meshes with a gear 44 which also meshes with a gear 45 on a shaft 46; this shaft 46 carries a sprocket wheel 47 over which one end of the chain belt 48 passes. The opposite end of the belt passes over and'is sup rted by the sprocket wheel 49. The chain lt is constantly in motion therefore (so long as the main driving motor 7 is running), and will be observed to be laid parallel to the direction of movement of the work, the lower run of the chain moving (right to left) in the opposite direction to the work. A clutch fastens the tool to the lower run of the chain when a cut is completed and thus the tool is returned to its initi'al left-hand position. This I iind is a simple and convenient method of driving a tool parallel to the work.

The bars 5 and 6 are not only parts of theframe of the machine, but I also use the lower pair of barsj5 as guides and supports for the clamp and Vork-supporting carriage 52. The base plate 52 of the clamp carriage.

has rolls 55 at its sides running on the two lower bars 5 of the frame, and also similar rollers 56 running against the undersurfaces of the bars 5 so that the clamp carriage is tied to but movable along these bars. On this carriage is a clamp for the work 35 consisting of a lower clamp member 57 fixed to the plate 52 and'a movable upper member 58 sliding on guide bars 60 and normally urged upwardly. to release position by springs 61. The work 35 is contained within the opposing recesses in the

members

57 and 58. To depress the upper member 58 to fasten the clamp and clamp carriage 52 to the work, two eccentric cams 62 are pivoted to the tops of guide bars and provided with arms 63 having slot and pin -connections with the tool carriage whereby they are operated by the-raising and lowering of the tool carriage. In the depressed position of the tool carriage and arms 63 (Fig. 6)

the cams depress the movable member 58 of. the clam 'so that the sub-carriage is clamped fast to t e work 35, and in the raised position of the tool carriage and arms 63 (Fig. 5)

the movable member 58 of the clamp is allowed to rise under the thrust of its springs 61 and release the sub-carriage from the work 35. A member 64 having a bell-shaped entrance directs the work35 into the clamp.

The tool illustrated is a circular saw 54 on the shaft of aV constantly running electric motor 53 which is mounted onthe base plate 67 of the tool carriage. In its vmovement toward and from the work (as crank 34 revolves) the tool carriage is guided by four upright guides 66 rising from the clamp carriage ase 52 and co-actingvguides 68 on the tool carriage respectively encircling the guides 66. The tool carriage 67 is suspendedy rom the crank 34 by the yoke 69 attached to the base 67, and at its arch hinged to a connecting rod member 70 projecting downwardl from a carriage 71 having an upper roller 2 rolling on top of the extended crank bar 34 and the underneath rollers 73 running 4on the underside of the crank b ar. The pins 78 operating in the slots of the 'clamp cam arms as before mentioned project from two of the guides 68 of theI tool carriage.

The operation of cutting may now be described along with certain details not yet mentioned. The motor 7 is assumed to be running, and also the saw-driving motor 53 and saw 54. Prior to making a cut (the clutch 16. being open) the tool carriage and clam carria e are at rest at their left-hand posit1ons (F1g. 1), and the Work 35 passes freely through the clamp 57-58 from left to right. When the solenoid 19 is energized momentarily, however, the clutch 16 is closed and the crank 34 is caused to go through one rotation as pointed out before. In this rotation the crank rst lowers or forces down the tool carriage (the guides 68 sliding on the guide members 66) so as to force the constantl rotating saw through the work 35. Be-

ore the tool 54 actually begins to make its cut in the work, however, the arms 63 of the clamp cams are forced down so far by the lpins 78 as to' attach the clamp carriage to the work 35, `so that thereafter and while the cut is being made the clamp carriage is moved along by the work' and rolls the tool carriage along the crank 34, acting through the guides 67 and 68. As the tool makes its cut, therefore, it is driven along with the work 35 at exactly the same speed as the work. The (in this instance) severing of the work is completed by the time the crank reaches its lowest position; the throw of the crank is designed to be sufficient for this result. On the second half of f the rotation of the crank 34 and the consequent liftin of the tool carriage, the tool is withdrawn om in front of the new end of approaches its upper the carriage to their Fig. 1 position. This clutch of the,l machine shown is a toothed member 79 arranged to engage its teeth in the lower run of the chain belt 48. This toothed member 79 is movable vertically and horizontally in a slot 81 l(Fig. 4) in a bracket 80 extending from the base 67 of the tool carriage and normally is held in an elevated position by a lower spring 82 as shown in Fig. 6; also it is normally held tothe right hand end of the slot 81 by a spring 83 carried on a guide rod 84 (Fig. 4). Whenthe tool car- .riage proper is depressed so far as to close the clam 57-58 on the work, the toothed member 9 is unable to Areach the chain 48. As the tool carriage rises above this point, however, after a cut is made, the toothed member 79 engages in the lower run of the chain and starts the tool and clamp carriages back to the initial position of Fig. 1 as lbefore mentioned. The purpose of the slotted mounting of the toothed member- 79 in the slot 81, as described, is two-fold,-irst, this construction enables the spring 83 to partly absorb the shock of the sudden engagement of the toothed member 79 with the chain 48, thereby softening the shock on the entire machine as the carriages are started t0 the left; second, the spring 83 ermits a certain overrun in case the tool an clamp carriages reach their left-hand positions (Fig. 1) slightly in advance of the disconnection of the toothed member 79 from the chain thus rendering very close adjustments unnecessary. The spring 82 and vertical movement ofv the toothed member also have two purposes first' this arrangement compensates for any raising of the tool carriage so high as otherwise) to press the member 79 too hard against the chain; second, this arrangement permits the toothed memberto be disconnected conveniently from the chain when the carriages reach their at-rest positions. A downward- 1y facing cam 86 placed to engage the toothed member at the surface 87 serves for this latter purpose. The lower run of the chain 48 may be supported by a strip or channel member 85 against the upward thrust -of the toothed member 79 under the pressure of spring 82, and the downward facing cam 86 may be mounted on this member 85, being so located as to be struck by the toothed member as the carriages approach their initial lefthand position. Spring-pressed bumpers 88 are preferably so placed as to be struck and compressed by the carriages as they approach their initial position, thus softening the stopping of the carriages, and by the energy thus stored inthe spring or s rings of the bumpers, providing means or promptly starting or assisting in the starting of the carriages in the direction of the movement of the work 35 'on the subsequent depression of the tool carriage to mak'eanother cut. A pivotedlatch 89, normally held in latching posi.- tlon by its spring 90, is arranged to engage 'an abutment 91 on the tool carriage proper ,to hold the carriages in their initial left-hand position against the thrust of the bumpers 88 and such dra of the work 35 on the guide 64 and clamp 5?-58 as there may be. As the crank 34 reaches its uppermost position at the end of a single revolution, it is stopped, of course, by the automatic opening of the clutch 16, and the parts are thus again left inthe position illustrated in Fig. 1. Another cycle may be begun .now and another piece cut oiil by again momentarily energizing the solenoid 19 to engage the clutch, whereupon the tool carriage is depressed as before described, and thereby first released from the latchl 89 (which is provided with an adjustable abutment 92 toprevent the latch following the carriage down too far) ,and there y y after both -carriagesare started in motion in the direction of the work, iirst'by the bumper 88 or conjointly by the bumpers and the engagement of the clamp 57--58.`

Each piece severed from the work 35 in the manner described leaves the machine through the bell-shaped guide 97 and is removed by a mechanism which automatically delivers the cut-ofi lengths to an appropriate lace. Conveniently this mechanism may e a chain-belt 98 with article carriers 99 to retain the work on the chain, to which may be added a final deliveryroller 100. The chain 98 may be of the sprocket type as illustrated, supported by

sprocket wheels

102 and 103; the sprocket 102 is car-- ried b a shaft 104 also having fixed to it a secon sprocket at 105 driven by a. chain 106 which, in turn, is driven by a sprocket at 107 fixed to the shaft 108 to which is attached the vsprocket 49 driven through the chain 48 as above described. The delivery chain 98 is constantly driven by the motor 7, therefore through the chain 48. The article supports 99 may be meta-l pieces bent orA constructed to provide a bottom and two side Walls (see Fig. 2), these being distributed alon the chain 98 (see Fig. 1), and the bottom o each being attached to sprocket links. This transfer mechanism is placed opposite the outgoing bell 97, and the upper run of the chain receiving the work from the bell, travels in the same direction as the Work.- Preferably the piece-removing mechanism begins to exert a removing tendency before the serverance is completed, so that the piece cut olf is pulled away from the tool immediately it is free from the on-coming work.

107 of proper diameters wit respect to each other as will be understood, and I so place the chain with respect to the -tool that theV por- Y tion of the work to be severed lies on the chain before the out is completed. While the cut is being made therefore the cham 98,

moving faster than the work 35, slides beneath this portion of the work and immediately on the completion of the severance, the severed piece is pulled away from the tool. lhe piece cut oil thereupon quiclgly acquires the speed of the chain which is rather high preferably for another reason also,'lnamely, to thrust each piece onto the receiver stack 111 of severed lengths. `Preferably the severed len thsare given a final thrust onto the pile llly the driven roller 100 beforemen tioned which is placed somewhere near, the exit end of the chain 98 so as to receive the work therefrom. To the driven roller 100 may be added an idler roller 101 to press the length of`work against the driven drum 100 for traction purposes; the lower roller 100 may be chain driven from the shaft 110 (to which the sprocket 103 is attached) at the same peripheral speed as the chain 98 or faster. As shown in Figures 1 and 2 idler rollers 112 may be used to press the work against the article supports 99 of the transfer lchain 98 'for traction purposes;these rollers may be mounted on a horizontal bar 113, brackets 114 being provided on the bar 113 and the rollers being hinged to the brackets 114 by pin and slot connections as indicated at 115, so that the rollers 112 rest their weight against the work to press the latter to the supports 99 andl also are adapted for work of various sizes. The roller 101 may f be similarly mounted.

The machine is electrically controlled as before indicated and the control circuits for this purpose are digrammatically illustrated Ain Figure 1; the electrical connections for supplying energy to the

motors

7 and 53 are not shown, however, but 'will be understood. The incoming lines for supplying the energy for the solenoid 19 for the clutchl are indicated at 119 and 120. The gauge for measuring the length lto be cut off consist of the switch 121 to be struck by each advancing new end of the-work 35 and actuated thereby; this controls the suppl solenoid, and may e mounted on the bar 113 and adjustable Vtherealong in a convenient manner so that pieces of any length can be cut within the capacity of the machine. As illustrated, the switch 121 has a swinging member-122 hinged at 123 to a bracket 124 suspended from the base plate of 121 and reaching downwardly to the path of the work. When no work is present on the transfer 98-99 immediately underneath the swinging of energy to the clutch/ member 122, this member hangs substantially straight .down and its upper end bears against one end of a sliding piece 125 held by'a slot and pin 128 to the base plate and normally drawn downwardly and to the right (in Fig.

1) b the spring 126; underneath the right han and lower end of the sliding member 126 is a projection 127 from the base plate which prevents the sliding member 125 from being turned further than shown in a clockwise direction on its pin 128. The member 125 is permitted to turn in a counter-clockwise direction, however, to a limited extent as hereafter explained. The switch lever v129 ispivoted and provided with a spring 130 to press the lever away from its cooperating contact 132 and press the operating pin 131 of the lever against the upper and lefthand end of the sliding member 125. As the work 35 advances the new end of the on-coming Work strikes the swinging member 122 and turns it counter-clockwise; the latter is thereby forced to slide member 125 upwardly and to the left and this pushes the switch lever 129 into engagement with the fixed contact 132. Substantially, or shortly after the engagement is made', the upper end of the swinging member 122, passes underneath the member 125 (assuming the work to be large enough to move the swinging member this far), thus permitting the spring 126 to return member 125 to the position lindicated and permitting the spring 130 to disengage lever 129 from fixed contact 132 and return it to the position shown. The arts are again in the positions illustrated in *ig 1 with the exception that the work 35 now extends under- `neath the swinging member 122 and the latter is displaced slightly counter-clockwise with its lower end resting` on the work'and its upper end standing beneath the sliding member 125. As the cut piece `travels from underneath the swinging member 122, the latter, by gravity or otherwise, swings back to the vertical position illustrated in the figure before the new lend of the on-coming work reaches it so that it is in position to measure the place of the succeeding cut, the return clockwise movement of tHe member 122 being permitted by the momentary raising of the lower and right-hand end of the member 125 from the projection 127 by the member 122', the member 125 being returned to 127 by the pull of the spring 126 as soon as the swinging member 122 reaches its vertical position indicated. My invention is not limited to this particular type )or kind of gauge, howevenas will be apparent.

The described momentary closing of the remote-control switch 129-132 energizes the automatic switch solenoid 135 (through the two lines 136 and 137) and this attracts its armature andv thereby engages the two switch Iarms 138 with their respective fixed contacts. This directly connects the clutch solenoid 19 to the

lines

119 and 120 and closes the clutch 16 and brings the severing mechanism into act-ion in the manner before l-described. To assure the solenoid 135 being energized long enough to bring the clutch into action, I use the third switch arm 140, line 141, and switch 142. The switch arm 140 is also engaged with its fixed contact by the movement of the armature ofsolenoid 135 and thus completes a circuit from the incoming lead 119 through the solenoid 135, lead 141, closed switch 142, switch lever 140 and lead 143 to the main switch and the incoming lead 120, this circuit serving to keep the solenoid 135 energized until switch 142 is opened. This switch (although not so shown) is located beside a rotating part of the clutch 16 which is provided with a pin-or cam (not shown) which holds the switch 142 closed while the clutch is disengaged (crank 34 at its upper position) and for a short time after the clutch starts the crank 34 revolving; at other times the switch 142 is held open. As soon as the clutch has been securely closed, therefore, the selenoid 135 is (le-energized by the opening of the switch 142 and thereby the solenoid 135 de-energized, the solenoid 19 deenergized, the lever 17 released and clutch 16 can open at the completion of a Vsingle rotation and remains open until the solenoids 135 and 19 are energized again. I prefer the holding circuit arrangement (140. 141, 142), since this permits the use at 121 of a switch which need be closed onlv momentarily, and this is advantageous. One or more manual and normallv open switches. 144, may be located about the machine as desired to permit the operator to make cuts at will. for example. to cut ofi' ends or remove bad spots, etc.

The operation of the machine as a whole can be summarized briefly as follows:

The work of indefinite length) travels to the right in Fig. 1. at a constant or irregular sneed. andthe pieces are cut off. one after another. as before described. their lengths beingl measured b v the position of the gauge switch 121 on the bar 113. The transfer mechanism 98-99 and 100 moves constantlv, as before explained. 'being driven by the chains 106. 48 and 40. The portion of the on-coming work'35 to be cut off. lies partiallv on the belt 98 prior to the cut. and. as its end moves. the swinging` member 122. the cutting operation is started. Immediately on the completion of the severance the pieces are removed from the tool and thrust onto the stack or receiver at 111, the linal outward piece by the driven going describes a machine embodying my invention, my invention is not limited thereto except as appears in the following claims,

and that various features of my invention'.

for guiding the cutting tool in its movement toward and from the work-supporting carriage, the tool-sup orting carriage being sup orted entirely by said crank and the wor -supporting carriage.

2. The subject matter of claim 1, charac- 1 terized by the fact that the work-supporting carriage is below the cutting tool and the cutting tool is suspended from the crank.

3. In a cutting machine of the kind indicated, a work support, a crank with a long pin above the work support, and a cutting tool suspended from the crank pin, revolution of the crank movin the cuttin tool toward and from the worlon the wor support and the tool being movable along the crank pin while cutting.

4. In a cutting machine, of the kind indi.- cated, frame members, a plurality of bars joining said frame members and therewith constituting an open frame work for the machine, a work-supporting carriage onand movable with the work along bars of said frame work, a crank supported on said frame work and having its crank pin substantially parallel to the direction of movement ofthe Work-supporting carriage, a cuttin tool carriage hung on said crank pin an movable along the crank pin with the work-supporting carriage, cooperating guides on said work-supporting carriage and said tool carriage to guide the tool carriage toward and from the work and to move the tool carria e in the direction of movement of the wor and power drivenmeans to turn the crank to move the cutting tool toward and from the work-supporting carriage.

5. In a cutting machine of the kind indicated, frame members, a plurality of bars joining said frame members and therewith f constituting an open frame work for the machine, a work-supporting carria e on and movable with the work along su stantially horizontal bars of said frame work, a crank supported on said frame work, a cutting tool carriage Vsuspended like a, pendulum from the crank substantially above said carriage and movable with and in the direction of movement of the work-supporting carriage, cooperating guides on said work-supporting carriage and saidtool carriage to guide the tool carriage toward and from the work and to move the tool carria e in the direction of movement of -the wor and power driven means, for turning the crank for moving the cutting tool carriage toward and from the work-supporting carriage. s

6. In a cutting machine of the kind indicated, lupri ht frame members, a plurality of substantially horizontal bars joining said -frame members and therewith constituting an open framework, a carriage suported on and moveable along a plurallty o said bars, a clamp on said carriage to engage the work to fasten the carriage to the work for movement therewith, a cutting tool, a crank supported by said framework above said carria e by which the cutting tool is carried an from which the cutting tool is suspended,`and cooperating guiding means for the cutting\tool and carriage or guiding the moveinent of the cutting tool toward and from the carriage and causing the cutting tool to move substantially horizontally along the crank with the carriage.

7. In a cutting machine of the kind indicated, a plurality of horizontal bars, frame Y members joining the bars and therewith forming an open frame work for the machine,

an elongated crank substantially parallel to the bars, a cutting tool suspended from the lcrank and movable along the crank, a clamp carriage below the cutting tool riding on some of said horizontal bars, a clamp on said carriage to attach the carriage to the work for movement by and with the work, and co-acting guide means attached to the suspended tool and said carriage to guide the tool as the revolution ,of the crank lowers the tool to the work in the clamp and raises the tool therefrom.

8. The subject matter of ,claim 7 in combination with an endless belt to return the tool and clampcarriage after a cut is made.

9. In a cutting machine of the 'kind indicated, a work support, a substantially horizontal guide along which said support is movable, a tool carriage, a saw mounted thereon` an electric motor also mounted on said tool carriage to drive said saw, said tool carriage being movable substantially vertically with its saw, and coacting substantially vertical guiding surfaces on the work support and the tool carriage to direct the vertical movement of the saw.

. 10. In a cutting machine of the kind described, a clamp member to be clamped to.

the work. and movable substantially horizontally therewith, a tool carriage, a saw mounted thereon, an electric motor also Vmounted on said tool carriage to drive said saw, a crank extending substantially parallel to the direction of movement of the clamp member and attached to the toolv carriage to movey kthe same together with its saw substantiallyvertically as the crank is revolved,

cated, a cutting coacting guides on said tool carriage and the clamp member to direct said vertical movement of the saw carriage with its saw, a driven shaft for turning said crank,` and a clutch between said dr1ven shaft and the crank.

11. In a cutting machine, a clamp for the work including a movable member, a carria e for' the cutting tool movable toward an from the work, and a hinged cam bearing on said movable member of the clamp, said cam having a slot and pin connection with said carriage through which the cam' is actuated as said carriage is moved toward and from the'work. v

12. In a cutting machine of the kind inditool, 4means for moving the tool with and y the work while cutting, a constantly moving belt, andmeans to connectthe cutting tool to the belt to return the cutting tool after the completion of a cutfsaid means being yielding to soften' the shock of starting the lcutting tool on its return movement.

13.- In a cutting machine of the kind indicated, a cutting tool movable toward the work for cutting and also movable from its place while cutting, a belt to return the tool in opposition to the last mentioned movement, anda clutch to fasten the tool to said returning belt, said clutch being brought into v movement of the tool away from the work.

15. In a cutting machine of the kind indicated, a cutting tool movable with the work, means to move the tool toward and from the work, a chain belt moving in a direction opposite the direction of movement `of the tool along with the work, a toothed member carried with the tool to engage the chain, so that the chain can return. the tool fromits displacement with the work, said toothed mem'- ber being engaged with the chain by movement of the tool away from the work, and means to disengage the toothed member from the belt on the completion of the return.

16. The subject matter of claim 14, characterized by the fact that the toothed member is spring-pressed toward the chain.

17. In a cutting machine of the kind indicated, a cutting tool movable with the work, means to move the tool toward and from the work, a chain to move in a direction oppotoothed member beimT engaged with the chain by movement of tIie tool away from the work and said toothed member being movable, with respect to the tool, both insubstantially the direction of movementoi:l the chain and in substantially the direction away from' the chain, and spring means pressing the toothed member toward the chain and in substantially the direction opposite the d irection of motion of the chai 18. The subject matter of claim 17, in combination with a cam to move the toothed member away from the chain to disengage said' member from the chain at the completion of the return of the tool by the chai-n.

19. In a cutting machine, a framework constituted by substantially vertical end i rames to rest on the machine foundation and three or more horizontally extending members joining said end frames and therewith outlining anvopen three-dimension space, a carriage resting on and movable along one or more of said horizontally extending mem bers ot said framework, a work clamp on said carriage, a power-driven cutting tool substantially within said three-dimension l space and movable toward and from Work in said clamp and also movable with said carriage, and a crank havmg its bearings 1n said end frames and 1ts`p1n extending substgntially horizontally and connected to said tool for moving the cutting tool toward and from the work. v

20. In a cutting machine, 'a framework constituted by substantially vertical end frames to rest on the machine foundation and three or more horizontally extending members joining said end frames and `therewith outlining an open three-dimension space, a clamp carriage resting on and movable along one or more of said horizontally extending members of said framework, a' Work clamp members of said framework, a clamp for the' work on said clamp carriage, a tool carnage substantially within said three-dimension space, above the clamp carriage, and movable toward and from the -cl'amp carriage and also movable with said clamp carriage, cooperating'guides on the two carriagesto direct the tool carriage in its movement toward and from the work and to move the tool carriage along with the clamp carriage, a power-driven cutting tool mounted on the tool carriage, and a cra k having its pin extending substantially ho izontally above the tool carriage, the tool carriage being carried by and suspended from the in of said crank and being movable alongsa1d pin.

22. In a cutting machine of the kind described, a tool for severing the Work, carriage means therefor, means for moving the carringe With the work while the tool is cutting, an endless belt, moving in substantially the same direction as the Work, lto receive the Work and remove the severed piece, article supports, providing side Walls to retain the work on the belt, being incorporated in the lghain, Aand rollers pressing the work to the In testimony whereof, I liave signed this specification. 4

` MAXWELL H. SUSSMAN.

on said carriage, a tool carriage substantiallv within said three-dimension space and movable toward and from work in said clamp and also movable with the clamp carriage. a circular saw mounted on said tool carriage, an electric motor also mounted on said tool carriage to drive the saw, .guides on said clamp carriage cooperating with guides on said tool carriage to direct the saw in its movement toward and from the work and to move the tool carriage along with the clamp carriage, and a crank having its pin extending substantially horizontally and connected to said tool carriage for moving the cutting tool toward and from the work.

2l. Tn a cutting machine, a framework Co constituted by substantially vertical end frames to rest on the machine foundation and three or more horizontally extending members joining said end frames and therewith outlining an open three-dimension space, a clamp carriage resting on and movable along one or more of said horizontally extending