US1224884A - Driving mechanism for power-operated machines. - Google Patents

Description

A. R. SCHOENKY.

DRIVING MECHANISM FOR POWER OPERATED MACHINES. APPLICATION FILED SEPT. Io. I9I4.

1,224,884. Patented My1,1917.

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A. H. SCHOENKY.

DRIVING MECHANISNI FOR POWER OPERATED MACHINES. APPLICATION FILED SEPT. lo. |914.

,224,884. Patented `May 1, 1917.

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AUGUST R. SCHC-ENKY, OF SOMEBVILLE, MASSACHUSETTS, AS-SIGNOR TO THE REECE SHOE MACHINERY COMPANY, OF BOSTON, MASSACHUSETTS, A CORPORATION OF MAINE.

DRIVING- MECHANISM FOR POWER-OPERATED MACHINES.

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Specification of Letters Patent.

Patented May ll, 19t '7.

Application filed September 10, 1914. Serial No. 861,001.

State of New York, have invented' certain new and useful Improvements in Driving Mechanisms for Power-Operated Machines, of which the following is a specication, reference being had therein to the accompanying drawing.'

rThis invention relates to driving mechanisms for power operated machines, and, while the invention might be employed in various types of machines and for various specific purposes, it is shown herein for convenience as applied to the operation of a sewing machine, the drawings specifically illustrating a sewing machine of the type employed for stitching together the outsole and welt of a shoe, known as an outsole stitching machine.

l have already filed applications for U. S. Letters Patent illustrating driving mechanism for outsole stitching machines and the same may be referred to for the purpose of ascertaining details which, for convenience, are omitted from the illustrations of the present application, or which are herein illustrated but not described in detail; for example, l refer to my prior Patent No. 1,085,093, granted January 20th, 1914.

Among the obiects of the present invention are, firstly, the general improvement in operation and eiiiciency of the driving mechanism for power operated machines of various types includingoutsole stitching machines. Secondly, to assist or` render nere prompt and certain the restarting of a machine after its stoppage by any stopping mechanism, whether of the type shown in my aforesaid Patent No. 1,085,093, or other type. Thirdly, to afford an improved and more ellicient means, in yconnection with a driving mechanism, for enabling the running' speed of the machine to be varied by suitable amounts and at suitable times, for instance, at the will of the operator of the machine. Other objects will be elucidated in the hereinafter following description of one convenient form or embodiment of the present improvement.

To the attainment of the above recited objects the present invention consists in the novel features, including mode of operation,

construction, combination, arrangement, devices, detail and other features hereinafter illustrated, described or claimed.

In the accompanying drawings forming a part hereof, Figure l is a front elevation of an outsole stitching machine or other ma- -chine provided'with the improvements constituting the present invention, the stitching and other instruments operated from the main shaft being omitted.

Fig. 2 is a vertical section taken on the plane 2 2 of Fig. 1. l

Fig. 3 is a vertical, axial section of the parts in the upper left hand corner of Fig. l, taken on the plane 3 3 of Fig. 5.

Fig. 4 is a similar section of the parts seen in the upper right hand corner of Fig, l, tanen on the plane 4 4 of Fig. 9 but showing in exterior view certain parts shown in section in Fig. 6.

Fig. 5 is a left elevation of the upper part of the machine. v

Fig. 6 is a central vertical section of certain parts which, in Fig. 4, are seen exteriorly, taken on the plane 6 6 of Fig. 9.

Fig. 7 is a vertical section seen from the rear taken on the plane-7-7 of Fig. 5.

Fig. 8 is a plan View of the upper portions of Figs. 4 or 9.

Fig. 9 is al right hand elevation of the parts at the upper right hand corner of Fig. l.

Fig. l0 is a left elevation partly in section upon theplane 10-10 of Fig. 1l of certain parts at the bottom of the machine, in the same adjustment as Fig. 11.

Fig. l1 isa front elevation of the same seen in different adjustment from Fig. l.

The same reference numerals designate corresponding parts in the different figures and drawings.

As usual the illustrated stitching machine has a rotating member, conveniently called the main-shaft, provided with operating cams from which the different parts of the stitching and allied mechanisms are operated or controlled. It will be understood that the main shafts rotation is rapid and lthat the stitch cycle presumably has a delinite relation to the shaft rotation, for eX- ample, one complete stitch being formed during each rotation. A stop motion or stopping mechanism is usually applied to such machines adapted to give a predeterrIhe main shaft or driven shaft 13 near they top of the machine is journaled in bearings 14 and at the left end of the shaft is a hand wheel 15. Secured on the shaft 13 are cam disks 16, 17, 18, supposed to contain cams or grooves for effecting the stitching and other operations, but which are omitted herefrom as unnecessary to a disclosure of the features of novelty constituting the present invention.

The drawings omit any disclosure of shuttle and associated parts, heating con-- nections, worl'r-support, presser-foot, awl, hooked needle, thread controlling mechanism and work feeding, means. There is shown the treadle 32 connected by rod 33 for permitting the operator to lift and release the presser-foot before the commencement or after the stoppage of a stitching operation.

The stopping mechanism, as before stated, is constructed on the principles of my said prior patent, and, in a broad sense, employs the principles of operation covered in prior U. S. patent of W. E. Goodyear, No. 818,159, granted April 17th, 1906, namely, by automatically reducing the speed of the driven or main shaft Vof the machine in a predetermined manner under control of the machine or shaft itself before stopping the machine, and continuing the engagement of the driving power after the speed is so reduced, and to a predetermined stopping position, generally with the main shaft in such position as to leave the needle disengaged from the work. As will be seen,

-the driving means for rotating the main shaft comprises a variable speed device of the face friction type which islautomatically adjusted progressively through an infinite number of adjustments from full speed to neutral or zero speed inv a definite way in the process of stoppage so that without need of impact of contacting stop members the parts are caused to come quietly to a precisely predetermined position. The adjustment of the variable speed transmittingA device is effected, not by the .i

operator nor dependent upon his skill, but by an' automatic part or cam disk actuated from the driven shaft itself so that the driven shaft, effecting its own stoppage through such cam, necessarily insures an accurate predetermined final shaft position. Rather than have the stopping cam act independently of the operat'oi"s will, for eX- ample, in conjunction with the work feeding, preferably, for an outsole stitching machine, the time of stoppage is left to the will and judgment of the operator so that when the line of stitching has proceeded to the desired point on the shoe the operator throws a control lever to set into action the automatic stopping cam. rlhe parts for effecting such driving and stopping action may be as follows:

A driving pulley, or power shaft l1 eX- tends` in a fore and aft direction and is provided at its front end in a usual manner with a face friction disk 47, and this is engaged by the adjustable friction wheel 4-9, the two constituting a variable speed transmitter, and herein used for driving, starting and stopping. The friction wheel is mounted on a horizontal cross shaft 16 and is capable of being adjusted laterally across the face of the friction disk by reason ofV a spline or key 50 between it and the cross shaft. If desired the wheel may be adjusted beyond the center of the disk for effecting a reverse drive where circumstances so require.

The friction wheel shaft t6 is mounted in bearings 51, 51 at its ends and extends beyond its right hand bearing to where it is provided with gears 52 connecting it with an upright shaft 53 which, in turn, at its upper end, is connected by gears 5d with the main shaft 13. rlhe described connections transmit the power of the driving shaft 11i to the driven or main shaft 13.

As before stated the power mechanism is to be rendered inoperative by automatically acting connections from the main shaft itself. Manifestly these connections are normally inoperative so that the machine may continue running. As will be seen, the connections are herein shown disconnectible., The connections include a cam disk device 69, having cam surface or groove 70, operated by the main shaft and cooperating through a follower to effect the adjustment of the transmitter to zero, and the cam and itsfollower are shown as relatively adjustable to engage or disengage at the will of the operator. Such connections from the main shaft to the transmitter may be as follows:

The friction wheel L19 has a collar 55 which affords a grooved connection witha ring 56 engaged by the upright arm 57 of a bell crank lever pivoted at 59 and whose other arm 58 engages at its extremity a device, to be hereinafter more particularly described, mounted at the lower end of a vertical rod 65 so that by moving the rod vertically the friction wheel is shifted horizontally. The rod 65 is normally pressed upwardly by a spring 66 contained in a barrel 67 which also serves as a sliding bearing for the rod. Near the upper end of the rod is a device or fcllower 68 cooperating with the cam 69 by engaging the groove 70 thereof at certain times. The groove 70 may be ofthe form indicated in dotted lines in Fig. 5. The groove comprises an initial portion near the center of the disk, this being concentric to facilitate the entry of the follower into the groove, an eccentric portion which serves to throw the follower 68 and the rod 65 downwardly, and finally a concentric portion near the disks periphery.

The relative engagement and disengagement of the cam and follower may be effected by sliding the cam disk on' its shaft 71 and the rotation of the disk in all positions is permitted through the peripheral toothed portion 72 of the disk always having engagement with a wider toothed gear 73 fast on the main shaft 13. The gear 73 is shown half the diameter of the disk 69 thus giving always a definite relation between the two. The eccentric portion of the cam groove 70 occupies approximately 180O of the cam so that the stoppage of the machine is effected during approximately one complete revolution of the main shaft or during the formation of one stitch, after the engagement of the cam and follower has become effective. ln order to slide the disk 69 toward and from the follower 68, a grooved collar 74 is secured to the disk and the train of mechanism through which the shifting is effected may extend to any operating lever, such as the knee lever 75, as follows: Engaged in the groove 74 is the stud on one arm of a bell crank lever 76, its other arm being connected by a downwardly extending rod 77 to another bell crank lever 78 connected by slide rods 79 with the swinging knee lever 75.

Throwing thc knee lever to the left throws' the rotating cam disk to the right and practically at once the follower enters the central concentric cam portion. Thereupon the y eccentric cam portion forces downwardly the follower thereby throwing friction wheel 49 to the neutral point or center of disk 47.

The termination of the eccentric portion is at the periphery of the disk and as this position corresponds to the neutral adjustment of the face friction gear the parts always come to rest with the cam disk in the same position. Therefore also the main shaft, which makes two revolutions to one of the cam disk, must always stop in the one predetermined position. The stoppage is without shock and is progressive, the driving action continuing throughout the stoppage, and the face .friction gear serving as a constant connection, effects. during its adjustment, a progressive retarding of the machine so that the natural slowing from friction cooperates with the retarding effect, and all the running parts come easily to a stop as the friction wheel reaches the center of the disk.

I come now to the features which more particularly constitute the subject of the present invention.

In restarting a power operated machine after stoppage in the manner described or analogously, the present invention performsl two functions, both supplemental to the usual starting operation and both mutually cooperating to insure prompt starting unaided by the operators hand and requiring no special attention. These two functions arc, first, the turning over or pushing of the main shaft to a slight extent to start its motion, and, second, the kicking or side pushing of the friction wheel laterally from its neutral position on the friction disk. These two supplemental functions are particularly useful in the illustrated type of machine because in the ordinary stopping position of the main shaft its resistance to restarting is large and likewise thc said shifting of the friction wheel over the disk is the more difficult when at its neutral position.

While these two supplemental functions coperate in the efficient restarting of the machine, each may be of itself structurally independent of the other and each may possess utility independent of the other so that it will be best to separately describe them.

It has been explained that the knee lever (which, of course, is representative of any other controlling part) is thrown to the right for effecting the described stoppage of the machine and it is thrown again to the left for restarting. In my prior patent when the lever is thrown to the left the restarting depends upon the action of the spring 66, which' tends to shift the friction wheel 49 across the disk 47. In thel present improvement the leftward movement of the control lever 75 is employed to bring aboute without the attention of the operator, the initial turning over of the main shaft and the budging or kicking of the friction wheel from its central position.

The connections and operation whereby the lcftward movement of the lever 75 starts the main shaft may be as follows: The up and down moving rod 65 by which motioi'i is transmitted to the face friction transmitter 47-49 has already been described. The upper end of this lies within one portion of a bracket fixed to the machine which also serves as a bearing for shaft 71.

Referring particularly to Figs. 1, 5 and 7. the upper end of the rod 65 is provided with a rack 100 which engages directly with a pinion 101 secured on a short pinion shaft 102, the shaft having also secured upon it a clutch member 103 in the form of a collar having wedge shaped recesses in each of which lies a rol'ler 104, and surrounding the clutch member 103 is a gear ring 105 whose exterior teeth engage the toothed periphery 72 of the cam disk 69. The parts 103, 104,-

105, constitute a sort of clutch, the rollers acting as pawls, which become wedged in place when the rack 100 rises and the pinion 101 rotates leftwise. @n other occasions the device is inoperative and the further rotation of the cam disk 69 is permitted.

The operation of these parts is that when the control lever 75 is thrown to the left thus disengaging the cam disk 60 from its follower 68, and the rod 65 carrying the follower rises under the infiuence of the spring 66, the rack 100 effects the leftwise rotation of the pinion 101 and through the pinion and the gears 72 and 73 the forward rotation of the main shaft 13. As the parts are constructed the complete upward sliding of the rod 65 is calculated to effect approximately an eighth revolution of the main shaft. As soon as the restarting has fairly commenced the main shaft may freely r0- tate being unaffected by the clutch device 10S- 105.

It will be noted that in the rod 77, through which the control lever 75 transmits shifting movements to the cam disk 69, is introduced a spring or yielding element 108, shown in detail in Fig. 2. This, in stopping the machine, permits the control lever to be thrown clear to the right in one movement of the operators knee without the slight pause or break in movement which might otherwise be necessary to await the engagement of the cam 69 with its follower.

To obviate the possible diliiculty of the friction wheel 494 failing to start from the center toward the periphery of the disk 47, the following simple mechanism is shown:

The bell crank lever 78, which is one of the train of elements between the control lever 75 and the shifting cam disk 69, is provided with an extension or contact 110 adapted to cooperate with a lug 111 formed on the rod 65. Generally speaking, this cooperation is that the contact 110 strikes a blow upon the lug 111 to actually lift the rod 65 and thereby, through the already described connections from the latter, start the friction wheel 49 from the center of the disk. It is preferred to introduce a spring 112 between the elements 110 and 111. The spring is shown inclosed in a barrel 113 carried by the lug 111, and located within the spring is a pin 114, its lower and outer extremity facing the contact extension 110 of the bell crank lever 78. According to the vertical adjustment of the lug on the rod the device may operate in either of the two following modes: With the illustrated adjustment when the knee lever is thrown by the operator leftward the bell crank 78 is swung so as to lift the extension 110, which, acting on the pin 114, rst compresses the spring 119J and then delivers a blow which kicks the rod upwardly, the spring then immediately coming into action to continue for an appreciable distance the upward movement of the lug and rod. Thereby, without the operators attention, the throwing of the control lever toY starting position effects a substantial upward movement of the rod 65 and thereby materially assists the restarting by initiating the movement of the wheel across the disk of the face friction transmitter.

By adjusting the lug 111 slightly lower on the rod 65 the result would be substantially the same but the compressing of the spring would be effected by the stoppage of the machine during the last part of the downward movement of the rod 65 in adjusting the transmitter to neutral. Thereupon on restarting the knee lever would, a little earlier in its movement, cause the extension 110 to deliver a blow on the lug 111, again causing the spring 112 to lift the rod 65.

In my aforesaid prior patent the outsole stitching machine may be driven at a certain maximum speed or the transmitter may be adjusted for stoppage and no provision was made for varying the running speed. In other words, the transmitter was introduced solely as a part of the stopping mechanism. Vhile` such construction has been satisfactory it may be desirable in some cases to permit suitable speed variations during the formation of a seam. Thus, for example, either at the will of the operator or automatically, the machines running speed might be somewhat reduced in stitching around the more abrupt curves of the shoe or other work. This result in the present type of machine and in connection with the illustrated stop motion might beeffected by introducing at any point in the train of transmitting parts a variable speed transmitter of any well known or suitable type. For example, a planetary gear could be introduced 1n the power shaft so as to vary the speed of the face friction disk 47. In such case the two variable speed transmitters would be substantially independent except sofar as one succeeds the other in the line of transmission.

According to the preferred embodiment,

y however, of this part of the present inventiolrtlie same transmitter is made to serve both purposes, namely, to constitute an effective stop mechanism, acting in the manner already set forth, and to constitute the means for varying the running speed of the machine.

I believe that I am the first to employ a variable speed transmitter which, on the one hand, may be suitably adjusted for varying the running speed of the machine, and which, on the other hand, constitutes part of an automatic stop mechanism by which the main shaft is automatically retarded, driven forward at reduced speed, and finally brought to rest in a denite predetermined shaft position.

The mechanism about to be described operates specifically on the principle of shifting over a desirable latitude, preferably less than its entire travel, the friction wheel 49 of the variable speed transmitter. In the type of machine illustrated it is desirable that the speed variations shall not be automatically effected, and therefore, a control lever or treadle is provided, and the partsA are advantageously so constructed that the treadle may be operated either for reducing the running speed from the normal or maximum or may, in starting the machine secure a reduced initial speed.

Reference has already been made to the bell crank lever 57, 58 between the friction wheel 49 and themupright rod 65. Instead of a direct connection between the lever arm 58 and the rod, the latter is provided at its foot with a device or block 120 with which the bell crank may be engaged. (See Figs. 1, 10 and 11.) According hereto the bell crank is not always engaged with the block but is capable of being pinned to it or released from it so as to have independent relative movement. The forward side of the block 120 is provided with shoulder 121 which is engaged by the finished outer edge of the arm 58 when the parts are in normal position. In this position the parts are adapted to be mechanically connected by a pivot pin 122 contained in a boss 123 formed on the lever arm 58 as is better seen in cross section in Fig. 10. The block 120 is recessed at 124 to receive the pin 122 when the members are enOaOed. The are shown engaged b D CJ in Fig. 1 but disengaged in Figs 10 and 11. A spring 125 tends to hold the lever arm 58 in normal. position contacting the shoulder 121. A spring 126 tends always to push the pin 122 into engagement with the recess 124. As before stated, the parts are normally engaged and throughout the running and stopping of the machine will remain engaged unless variation of running speed becomes desirable. I

To effect variation in running speed the present invention operates on the principle of disengaging the bell crank arm 58 from the block 120 and thereupon independently adjusting the bell crank and the friction wheel. To effect such disengagement by withdrawing the pin 122, there is shown a wedge 130 consisting of a thin plate of the shape shown in Fig. 10, it passing vertically through slots formed in the pin 122 and the on the friction disk 47 walls of the boss 123, and having a shoulder 131 at its upper end to determine its downward adjustment. The depression of the wedge throws the pin out of locking position. The lifting of the wedge permits the spring to return the pin. The lower end of the wedge 130 is provided with an opening 132 which is engaged by an arm 133 so that the arm may effect the necessary up and down movement of the wedge. The arm 133 is shown for convenience fulcrumed on the same fulcrum shaft as the bell crank 57, 58, and a spring 134 is employed tending to hold upwardthe arm 133 and the wedge .130 so that normally the wedge is inoperative and the pin 122 is engaged with the block at the foot of the rod 65.

The described parts are preferably controlled by a treadle 135 which may be depressed at will against the resistance of spring 136 and which, when depressed, acts through link 137 to pull down the arm 133..

The treadle, therefore, not only controls the engagement and disengagement of the bell crank from the rod but also effects the swinging of the bell crank to somewhat vary the running speed of the machine. The described parts effect this result in the following manner: Assuming the treadle is in its normal or upward position as in Fig. 1, it is then inoperative for all purposes. In fact, the link 137 is provided with an `elongated slot 138 which permits free up and down swinging of the arm 133 so that the ordinary processes of starting and stopping the machine are in no way interfered with. By now depressing the treadle 135 the first `action is to pull down the wedge 130 through the slots in the boss 123 to the position shown in Fig. 10 thus retracting the pin 122 from the recess 124. At` the end of this movement the shoulder 131 engages the fboss 123. The continued downward movelment of the treadle thereupon, acting through the arm 133 and the wedge, de'- presses the bell crank arm 58, of which the lboss 123 forms a part. In Figs. 10 and 11 the parts are shown in this position. The pin 122 is considerably below the recess 124. The effect of such swinging of the bell crank is to throw the friction wheel 49 from its full speed or peripheral position to an intermediate position. For example, the throwing down of the speed varying treadle 135 may adjust the friction wheel. one half of the distance from the periphery to the center of the friction disk, as shown in Fig. 11, thus giving half speed to the machine.

It will be understood that the operator by intelligent use of the treadle, may effect any reduction of' speed between full speed and half speed.

The release of the treadle merely restores the parts by first permitting the bell crank to resume full speed position and then permitting the pin 122 to ree'ngage the recess 124.

If the operator, when the machine is not running, should hold the treadle 135 fully depressed and should then restart the machine by the knee lever, the starting would be as usual excepting that when the friction wheel reached the half speed position shown in Fig. 11, the continued rise of the adjusting rod 65 would thereupon cease increasing the speed but, on the contrary, would effect the disengagement of the pin 122 in precisely the same relative manner as before described, thus leaving the machine running at half speed under the control of the treadle 135, which, at will, could be released to permit full speed.

1t is sometimes desirable to permit the main shaft to be turned by hand when the machine is not running for the purposes of inspection and adjustment, etc. Ordinarily this is simply enough done by the hand wheel 15 when power is uncoupled or unclutched from the shaft. Vith, however, an automatic stop mechanism such as that herein shown where a variable speed transmitter is adjusted to Zero without uncoupling, the main shaft could not be turned over by hand. To permit this a supplemental clutch is introduced between the transmitter and the main shaft. Moreover, where, in stopping the machine, the driven or main shaft effects the readjustment of the transmitter, there is another train of mechanism in operative connection with the shaft. Herein is also shown a means of uncoupling or unclutching those connections. Moreover, a single control handle is shown for controlling the coupling and uncoupling, simultaneously or otherwise, of the two trains of mechanisms connected with the main shaft. These features and the details will now be described.

For uncoupling the main shaft from the variable speed transmitter, a clutch is introduced in the transmitter upright shaft 53 near its upper end, said clutch consisting of an upper member 140 keyed to the upper section of the vertical shaft, and a lower member 141 fast on the under section of the shaft as shown in Fig. 9.

The upper clutch member is adjusted upwardly or downwardly through a clutch fork 142 controlled by a handle 143 so that at will the clutch can be opened, thereby uncoupling the main shaft.

This alone, however, is insufficient because when the machine has been stopped the main shaft is partially locked by the train of mechanism including gear 73, toothed disk 69, follower 63, rod 65, bell crank 57, 58 and friction wheel 49. Moreover, the clutch device 103-105 would prevent any reverse rotation of the main shaft. It is preferred to uncouple the enumerated parts by means of a clutch connecting gear 73 with the main shaft 13, and the opening and closing of such clutch is preferred to be effected by the throwing of the same handle 143 as already mentioned in connection with clutch 14o, 141.

The full details of the parts referred to will now be described with particular reference to Figs. 1, 3, 4, 5, G, 8 and 9.

The control handle 143 is not rigid with the clutch fork 142 but both of them and an arm 156, hereinafter to be more fully referred to, loosely surround a fixed stud 144 forming a fulcrum or pivot for the three.

The operation of the clutch fork 142 is through a spring 145 pressing upon an eX- tension of the fork and tending to lift the fork to open the clutch 140, 141. The control handle 143 has three positions. 1t is shown in its forward position in which the clutch 140, 141 is closed. Swinging the handle from its intermediate to its forward Vposition closes the clutch by reason of a shoulder 146 formed on the clutch fork 142 being engaged and pressed by a shoulder 147 formed on the handle. In moving between its rear and intermediate positions the handle does not affect the clutch, but during such movement the handle may affeet the clutch at the left end of the'main shaft, namely, between the shaft and the gear 73.

The latter clutch is shown in cross section in Fig. 3 and in left view in Fig. 5. It comprises a clutch member 150 rigid with or forming part of the hand wheel 15 and located alongside of the gear 73. A clutch pin 151 sliding in the clutch member 150 is adapted to engage a recess in the gear. Vhen en gaged the gear is clutched to the main shaft, when disengaged they are unclutched. The pin 151 is slid under control of the lever 152 carried on the clutch` part 150. A spring tends to close the clutch and for opening it the lever has a long rod 153 attached, to it which may be pushed leftwise to open the clutch. It will be understood that all of the described parts rotate with the main shaft, and the rod 153 is centrally located within the hollow of the shaft. Indeed, passing to Fig. 4, the rod is seen to extend clear through and to project from the righthand extremity of the shaft to a point where it is adapted to be moved leftward by a shoe or wedge 155 for opening the clutch 73, 150.

The shoe or wedge 155 is located within a stationary housing which gives it a sliding support, and it operates'as a cam so that when moved forwardly it pushes the rod 153, and when moved rearwardly permits the rod to resume its normal position. The wedge 155 is carried at the upward eX- tremity of a swinging lever 156 whose hub loosely surrounds` the hub or sleeve of the hand lever 143, as seen in Fig. 6. In swinging the handle from its intermediate to its rear position the wedge is thrown forwardly to unclutch the clutch 73, 150. Normally the wedge lever 156 and the handle 143 are held in rigid relation by a device comprising a knob 160 having two radial teeth 161 each engaging slots formed in the hubs of both handle and lever as seen in Fig. 6. A spring 162 in the interior of the fixed stud 144 tends to hold the parts in the position shown but when desired the knob 160 may be extracted axially and shifted to an inoperative position so that the swinging of the handle 143 cannot open the clutch 73, 150.

The described mechanism gives practically universal possibilities as to clutching and unclutching the main shaft at its right and left ends. As the parts are shown in the figures both the clutches are closed. If the handle be thrown clear to the rear it first permits the opening of the right-hand clutch and then the opening of the left-hand clutch. While the handle then stands at the rear the operator may freely turn the main shaft by hand as desired. In restoring or recoupling the main shaft this must be done so as to restore the same rotative relation between the parts as before. Preferably the operator will pull the handle 143 forward to its intermediate position, thus releasing the left hand clutch, and then turn the hand wheel 15 until the clutch pin 151 snaps into place. The main shaft is then in proper relation to the stop mechanism. The handle will then be pulled completely forward and the clutch parts 140, 141 permitted to reengage.

The following further remarks will elucidate some of the features in the several branches of this invention: It will be seen that beside the previously known stopping and restarting mechanism the machine embodies a supplemental means for assisting the restarting. This supplemental means is operated by the controller or lever 75. The supplemental restarting means is positive in action whereas the main restarting means is not positive, it comprising' a powerstoring device such as the spring 66 arranged t-o eect the adjustment of the transmitting mechanism to its driving adjustment. rPhe supplemental starting means includes either the devices for slightly turning the driven shaft to initiate its rotation, or the device for starting the movement of adjusting the transmitting mechanismtoward its driving adjustment, or both of them. The face friction gear 47, 49 is the most convenient type of variable speed transmitter of a constantly-coupled nature and such type is of particular importance in that the speedreduction effects a constant retarding action and the adjustment to zero effects an actual stoppage without the requirement of impacting contacts. More broadly this instrument may be referred to as a variable speed transmitter' which is coupled in both its driving and stopping adjustments.

It will thus be seen that there has been described a driving mechanism for power operated machines attaining the objects and advantages hereinbelow recited and other advantages will be apparent to those skilled in the art to which the present invention pertains. Since many matters of arrangement, combination, design, structure, detail and other features may be indefinitely varied without departing from the novel principles involved, no limitation to such features is intended excepting so far as set forth in the appended claims.

What is claimed is:

1. ln a power operated machine the combination with the power shaft and a driven shaft, of a transmitter between said shafts adjustable into and from driving positions, means for effecting said adjustments and supplemental means for assisting the restarting of said driven shaft.

2. ln a power operated machine the combination with the power shaft and a driven shaft, of a transmitter between said shafts adjustable into and from driving positions, means for effecting said adjustments, a controller or lever therefor, and supplemental means operated by the control lever for assisting the restarting of said driven shaft.

3. In a power operated machine the combination with the power shaft and a driven shaft, of a transmitter between said shafts adjustable into and from driving positions, means for effecting said adjustments, comprising a power-storing device or spring adapted to adjus said transmitter t-o driving adjustment, a controller for said means, and supplemental means operated by the controller fo assisting the restarting of said driven shaft.

4. In a power operated machine the combination with the power, sha-ft and a driven shaft, of a transmitter between said shafts adjustable into and from driving positions, means for effecting said adjustments, a controller or lever therefor, and supplemental means operated by the control lever for assisting the restarting of said driven shaft by slightly turning the driven shaft to initiate its rotation.

5. In a power operated machine the combination with the power shaft and a driven shaft, of a transmitter between said shafts adjustable into and from driving positions, means for effecting said adjustments, a controller or lever therefor, and supplemental means operated by the contr-ol lever for assisting the restarting of said driven shaft by starting the adjustment of said transmitter toward driving adjustment.

6. In a power' operated machine thc combination with the power shaft and a driven shaft, of a transmitter between said shafts adjustable into and from driving positions, means for effecting said adjustments, a controller or lever therefor, and supplemental means operated by the control lever for assisting the restarting of said driven shaft by slightly turning the driven shaft to initiate its rotation and by starting the adjustment of said transmitter toward driving adjustment.

7. In a power operated machine the combination with the power shaft and a driven shaft, of a transmitter between said shafts adjustable into and from driving positions, means for effecting said adjustments, comprising a power-storing device -or spring adapted to adjust said transmitter lto driving adjustment, a controller for said means, and supplemental means operated by the controller for assisting the restarting of said driven shaft by starting the adjustment of said transmitter toward driving adjustment.

8. In a power operated machine the combination with the power shaft and a driven shaft, of a transmitter between said shafts adjustable into and from driving positions a controller, means controlled by said controller for automatically adjusting said transmitter to driving adjustment for starting the machine, and a supplemental means operated by the controller for assisting the starting of said driven shaft.

9. In a power operated machine the combination with the power shaft and a driven shaft, of a transmitter between said shafts adjustable into and from driving positions,-

a controller, means controlled by said controller for automatically adjusting said transmitter to driving adjustment for starting the machine, and a supplemental means operated by the controller for assisting the starting of said driven shaft by slightly turning the driven shaft to initiate its rotation.

10. In a power operated machine the combination with the power shaft and a driven shaft, of a transmitter between said shafts adjustable into and from driving positions, a controller, means controlled by said controller for automatically adjusting said transmitter to driving adjustment for starting the machine, and a supplemental means operated by the controller for assisting the starting of said driven shaft by starting the adjustment of said transmitter toward driving adjustment.

11. In a power operated machine the combination with the power shaft and a driven shaft, of a transmitter between said shafts adjustable into and from driving position, a controller, means controlled by said controller for automatically adjusting said transmitter to driving adjustment for starting the machine, and a supplemental means operated by the controller for assisting the starting of said driven shaft by slightly turning the driven shaft to initiate its rotation and-by starting the adjustment of said transmitter toward driving adjustment.

12. In a power operated machine the combination with the power shaft and driven shaft, of a constantly-coupled variablespeed-transmitter between said shafts, a controller, means controlled by said controller for automatically adjusting said transmitter to start the rotation of the driven shaft, and means actuated by the controller foi1 assisting the restarting of said driven shaft.

13. In a power operated machine the combination with the power shaft and driven shaft, of a constantly-coupled variablespeed-transmitter between said shafts, a controller, means controlled by said controller for automatically adjusting said transmitter to start the rotation of the driven shaft, and means actuated by the controller for assisting the restarting of said driven shaft by slightly turning over the driven shaft to initiate its rotation.

14.-. In a power operated machine the combination with the power shaft and driven shaft, of a constantly-coupled variablespeed-transmitter between said shafts, a controller, means controlled by said controller for automatically adjusting said transmitter'to start the rotation of the driven shaft, and means actuated by the controller for assisting the restarting of saiddriven shaft by kicking said transmitter adjusting means toward driving adjustment.

15.` In a power operated machine the combination with the power shaft and driven shaft, of a constantly-coupled variablespeed-transmitter between said shafts, a controller, means controlled by said controller for automatically adjusting said transmitter to start the rotation of the-driven shaft, and means actuated by the controller for assisting the restarting of said driven shaft by kicking said transmitter adjusting means toward driving adjustment and by slightly turning over the driven shaft to initiate its rotation.

16. In a power operated machine the combination with the power shaft and a driven shaft, of an adjustabletransmitter between the shafts, a starting member or lever, means actuated by saidmember adapted for causing the adjustment of the transmitter to driving adjustment to start the driven shaft, and a supplemental means actuated by said member for initially turning over the driven shaft when startin'g'the driven shaft.

17. In a power opera-ted machine the combination with the power shaft and a driven shaft, of an adjustable transmitter between theshafts, a starting member or lever, means actuated by said'member adapted for causing the adjustment of the transmitter to driving adjustment to start the driven shaft,

and a pawl and ratchet device actuated by said member for initially turning over the driven shaft when starting the driven shaft.

18. In a power operated machine the combination with the power shaft and a driven and a spring `device actuated by said mem` ber for initially turning shaft when starting the driven shaft.

19. In a power operated machine the `combination with the power shaft and a driven shaft, of an adjustable transmitter between the shafts, a starting member or lever means actuated by said member adapted for causing the adjustment of the transmitter to driving adj ustment to start the driven shaft, and an impact device actuated by said member for initially turning over the driven shaft when starting the driven shaft.

20. In a power operated .machine the combination with the power shaft and a driven shaft, of `an adjustable transmitter between the shafts, a starting member or lever, means actuated by said member adapted for causing the adjustment of the transmitter to driving adjustment to start the driven shaft, and a supplemental means actuated by said member for initially turning over the driven shaft when starting the driven shaft, the same comprising a pawl and ratchet device adapted to advance the shaft and an impact device for actuating the pawl and ratchet device by the operatiotn 0f said starting member.

21. In a power operated machine the combination with the power shaft and a driven shaft, of Yan adjustable transmitter between the shafts, a starting member or lever, means actua-ted by said member adapted for causing the :adjustment of the transmitter to driving adjustment to start the driven shaft, and a supplemental means actuated by said member -for initially turning over the driven shaft when starting the driven shaft, the same comprising a pawl and ratchet device j adapted to advance the shaft and an impact device for actuating the pawl and ratchet device by the operation of said starting member anda spring device adapted for prolonging the shaft turning action.

22. Ina power operated machine the combination with the `power shaft and a driven shaft, of ,an adjustable transmitter between the shafts, a controller or lever, means controlled by said ,controller adapted for automatically 'causing the adjustment of the transmitter to driving adjustment nto start the vdriven shaft, anda supplemental means y ing the transmitter over the driven Aj ustment to start the actuated by said controller for initially kicking the transmitter toward driving adjustment when starting the driven shaft.

23. In a power operated machine the combination with the power shaft and a driven shaft, of an adjustable transmitter between the shafts, a controller or lever, means controlled by said controller adapted for automatically causing the adjustment of the transmitter to driving adjustment to start the driven shaft, and a supplemental means actuated by said controller for initially kicktoward driving adjustment when starting the driven shaft, comprising a contact movable by the controller, and a coperating cont-act in the transmitter adjusting means.

2a. In a power operated machine the combination with the power shaft and a -driven shaft, of an adjustable transmitter between the shafts, a controller or lever, means controlled by .said controller adapted for automatically causing the adjustment of the transmitter to driving adjustment to start the driven shaft, and a supplemental means actuated by said controller for initially kicking the transmitter toward driving adjustment when starting .the driven shaft, com- Aprising a `contact movable by .the controller,

and a coperating contact in the transmitter adjusting means and a `spring device associated with said contacts for prolonging the initial adjustment of the transmitter toward driving adjustment.

25. In a power operated machine the combination with the power shaft and a driven shaft, of a constantly-coupled variable-speedtransmitter between the shafts, `a cont-roller or lever, means controlled by said controller ,adapted for automatically cansino the adjustment of the transmitter to driving addriven shaft, and a supplemental means actuated Vby said controller for initially kicking the transmitter toward driving adjustment whenstarting the driven shaft.

26. In a power operated machine the combination with the power ,shaft and a driven shaft, of a constantly-coupled variablespeed-transmitter between the shafts, a controller or lever, a part such as rod V65 through which the transmitter is adjustable, automatic connections operable from one of the shafts and controlled by said controller for shifting said part or rod to adjust the transmitter to stop position, and a supplemental .starting means operable by the controller on restarting the driven shaft, comprising a device whereby the controller actuates said part or rod.

27. In a poweroperated machine the ycombination with the power shaftand a ,driven shaft, of a constantly-coupled variablespeed-transmitter between ^the shafts, a controller or lever, a part such as rod 65 through which the transmitter is adjustable, automatic connections operable from one of the shafts and controlled by said controller for shifting said part or rod to ad` just the transmitter to stop position, and a supplemental starting means operable by the controller on restarting the driven shaft,

comprising an impact device whereby the co-ntroller actuates said part or rod and a spring for prolonging the movement of said art. p 28. In a power operated machine the combination with the power shaft and a driven shaft, of a Constantly-coupled variablespeed-transmitter between the shafts, a controller or lever, a part such as rod 65 through which the transmitter is adjustable, automatic connections operable from one of the shafts and controlled by said controller for shifting said part or rod to adjust the transmitter to stop position, and a supplemental starting means operable by the controller on restarting the driven shaft, comprising a device whereby the controller actuates said part or rod; and a device operated by said part or rod for initially turning the driven shaft to assist starting said driven shaft.

29. In a power operated machine the combination with the power shaft and a driven shaft, of a variable-speed-transmitter `between the shafts, automatic means operable at suitable times for adjusting the transmitter to stop the driven shaft, and an independent controller adapted to vary the running speed of the driven shaft.

30. In a power operated machine the combination with the power shaft and a driven shaft, of a variable-speed-transmitter between the shafts, automatic means operable at suitable times for adjusting the transmitter to stop the driven shaft, and an independent controller adapted to vary the running speed of the driven shaft by adjusting the driving adjustment of said transmitter.

31. In a power operated machine the combination with the power shaft and a driven shaft, of a constantly-coupled variablespeed-transmitter between the shafts, connections whereby one of the shafts may adjust the transmitter to neutral to stop the driven shaft, a controller for controlling the operativeness of such connections, and a second controller for suitably varying the running speed of the driven shaft.

32. In a power operated machine the combination with the power shaft and a driven shaft, of a constantly-coupled variablespeed-transmitter between the shafts, oonnections whereby one of the shafts may adjust the transmitter to neutral to stop the driven shaft, a controller for controlling the operativeness of such connections, and a second controller for suitably varying the speed-transmitter between the shafts, con

neotions whereby the driven shaft may adjust the transmitter to neutral to stop the driven shaft with the driven shaft in a predetermined position, a controller for controlling the operativeness of such connections, and a second controller for suitably varying the running speed of the driven shaft by adjusting said transmitter from and toward its full speed adjustment.

34. In a power operated machine the combination with the power shaft and a driven shaft, of a face-friction variable-speedtransmitter between the shafts, connections whereby the driven shaft may adjust the transmitter to neutral to stop the driven shaft with the driven shaft in a predetermined position, a controller for controlling the operativeness of such connections, and a second controller for suitably varying the running speed of the driven shaft by adjusting said transmitter from and toward its full speed adjustment.

35. In a power operated machine the combination with the power shaft and a driven shaft, of an adjustable transmitter between the shafts, a coupling between the transmitter and driven shaft, and a handle for coupling and uncoupling the same.

36. In a power operated machine the coinbination with the power shaft and a driven shaft, of an adjustable transmitter between the shafts, connections whereby the driven shaft may automatically adjust the transmitter to stop the driven shaft, a coupling between said connections and driven shaft, and a handle for coupling and uncoupling the same.

37. In a power operated machine the com bination with the power shaft and a driven shaft, of an adjustable transmitter between the shafts, connections whereby the driven shaft may automatically adjust the transmitter to stop the driven shaft, a coupling between said connections and driven shaft and a handle for coupling and uncoupling the same, and a coupling between said transmitter and driven shaft worked by said handle.

38. In a power operated machine the combination with the power shaft and a driven shaft, of an adjustable transmitter between the shafts, connections whereby the driven shaft may automatically adjust the transmitter to stop the driven shaft, a coupling between said connections and driven shaft, and a handle for coupling and uncoupling the same, and a coupling between said transmitter and driven shaft worked by said handle, said handle having devices associated with it whereby it may cause the coupling or uncoupling at will of either or both said couplings.

39. In a power operated machine the combination with the power shaft and a driven shaft, of an adjustable transmitter between the. shafts, connections whereby the driven shaft may automatically adjust the transmitter to stop the driven shaft, a coupling between said connections and driven shaft, and a handle for coupling and uncoupling the same, said coupling adapted to rengage always at a definite shaft position.

40. In a power operated machine the combination of a driven shaft, a constantlycoupled variable-speed-transmitter through which the shaft is driven, connections including a cam-and-follower device by which the shaft may eect transmitter adjustments, a controller for effecting engagement of cani and follower at suitable times, and a yielding element, as 108, between said controller and cam-and-follower device.

In testimony whereof', I have affixed my.

signature in presence of two witnesses.

AUGUST R. SCHOENKY.

Witnesses:

WARREN NICHOLS, THOMAS J. CARTY.

Copies of this patent may be obtained for ve cents each, by addressing the Commiioner of Patent, Washington, D. C.

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