US1085093A - Sewing-machine. - Google Patents

Description

A. R. SCHOENKY.

SEWING MACHINE.

APPLICATION FILED FEB. 4, 1913.

1,085,093. Patented Jan. 20, 1914.

2 SHEETS-SHEET l.

Z r 192 J5 75 22 14 5 a Li 0 27 6'8 2 3 A. R. SCHOENKY.

SEWING MACHINE.

APPLICATION FILED FEB. 4, 1913. 1,085,093. Patented Jan.20,1914.

2 SHEETS-SHEET 2.

zllllillll M M is" J6 47 .51 ii 7 2 61 6.2 I w 55 7419 i''c klzesses 6'3 59 V 06 @Q/MW/ 54 y j AUGUST 3. scnomrxx,

OF SOMEBVILLE, MASSACHUSETTS, ASSIGNOR TO THE REECE SHOE MACHINERY COMPANY, OF BOSTON, MASSACHUSETTS, A CORPORATION OF MAINE.

SEWING-MACHI-N E.

To all whom it may concern:

Be it known that I, AUGUST R. SoHoENxY, a citizen of the United States, residmg at Somerville, in the county of Middlesex and State of Massachusetts, have invented certain new and useful Improvements in S ewing-Machines, of which the following is a specification, reference being had therein to the accompanying drawing.

My invention relates more particularly to sewing machines and is directed especially to providing mechanism whereby an effective, yet easy and accurate stoppage of the machine may be conveniently effected by the operator.

I will for convenience illustrate the present invention as applied to a sole sewing machine of the general type and construction illustrated and described in expired Patent No. 473,870 granted April 26, 1892.

In such a machine there is a rotating member which ma also be called the main shaft, which is provided with operating cams from which the different parts of the stitching and allied mechanisms are operated, or controlled. With such a machine or any analogous machine wherein the rotation of the main shaft is rapid and the stitch cycle has a definite relation to a rotation of the shaft, for example one complete stitch being formed during each rotation, the ordinary type of stop mechanism when shifted will bring the machine to a stop, but without any definiteness or predetermined character of action. Indeed the machine might through momentum run on for an indefinite number of stitches and might come to an actual stop by chance at any point in the stitch cycle. This requires the attention on the part of the operator necessary to turn by hand the main shaft to the proper point in the cycle enabling the desired steps to be taken, for example, releasing the work or some other thing to be performed. To release the work the needle must be out of the work and so must the awl, where an awl is employed, and the tension must be removed from the thread so that some thread may be pulled out in the act of extracting the work.

One of the more important objects hereof is to render it possible in a machine of Specification of Letters Patent.

Patented Jan. 20, 1914.

Application filed February 4, 1913. Serial No. 746,164.

the kindreferred to,to at will effect the stoppage of the machine by means which automatically causes the parts, during the stoppage, to come to rest in the desired stage in the cycle of formation of a stitch.

Another object hereof is to secure a definite mode of stoppage in respect to the number ofstitches formed during the stopping operation, for example as particularly illustrated herein, when the stop lever is thrown the stitching mechanism will complete the stitch upon which it is then working and two complete further stitches, then coming to a standstill at the precise predetermined point which is most convenient for the suitable extraction of the work.

Other and further objects hereof will be referred to in the hereinafter following specification, or will be apparent to those familiar with the subject.

To the attainment of such objects and advantages, the present invention consists in the novel devices, features, combinations and arrangements described and illustrated in the following description and in the drawings.

I will first describe a sewing machine embodying the present improvements and will thereafter point out the novel features in the claims.

In the accompanying drawings forming a part hereof, Figure 1 is a front elevation of a sole sewing machine provided with the improvements constituting my present invention. Fig. 2 is a right hand elevation "partly in section upon the plane 2-2 of Fig. 1. Fig. 3 is a plan view partly in horizontal section on the plane 3-3 of Fig. 1. Fig. 4 is a front elevation of the interior of the rack and pinion connecting device. Fig. 5 is a view similar to Fig. 2, but showing a modification in the construction and operation of the invention.

Similar numerals of reference refer to corresponding parts in the several figures of the drawings.

Before describing the particular features constituting the present invention, I will refer to some of the general machine parts and portions of the stitching mechanism.

The machine may have a vertical post 11 same by hand when desirable.

with supporting legs 12 at the base. At the top of the machine is shown a rotating member which preferably takes the form of a shaft, and will be hereinafter referred to as the main shaft 13 of the machine. It is from this shaft that the stitching operations are effected as will more clearly appear. Bearings 14 may be provided near each end of the main shaft for supporting it in a fixed location, and the shaft at its left end may have a hand wheel 15 for turning the Secured on the main shaft are right hand, middle, and left hand cam disks, 16, -17 and 18 respectively, containing the cams or grooves for effecting part or all of the stitching operations.

A sole sewing machine, employed for stitching together the outsole and welt of a shoe, is usually provided with a circularly moving shuttle 19 as shown, suitably mounted an containing a bobbin for an upper thread adapted to be interlocked with a lower thread as is usual. An openable bobbin retainer 20 stands in front of the shuttle and bobbin. The particular type of machine referred to being adapted to employ waxed thread there may be as usual various steam pipes 21 and steam boxes 22 for keeping parts of the machine and the thread in a heated condition.

At the front, beneath the shuttle, is a work support 23 above which is a presser foot 24 and the two are relatively movable. For example the presser foot may be lifted to insert the work and pressed downwardly to hold the work during stitching. An awl and awl parts, as usual, are below the work and a needle and needle parts are above the work. The awl is adapted to penetrate the work and to effect the feeding, and to withdraw to permit the needle to enter the same puncture. Cooperating with the hooked needle below the work is a thread looper 27 to which the under thread passes from a take-up 28, the thread having first passed through an auxiliary take-up 29 and before that a thread lock or wheel 30, these instruments being operated to feed thread for each stitch and to thereafter take up the slack. The awl and its supporting. part are carried on a feed slide 31, which reciprocates rightward and leftward to effect the feeding of the work asthe stitching progresses. -A treadle 32 is shown connected by a rod 33 with mechanism by which the depression of the treadle at will lifts the presser foot for inserting and extracting the work. i

I will not attempt to describe the connections from the cams on the main shaft to the different stitching instrumentalities, but I will mention the functions performed to indicate the nature thereof. The three cam disks each have cam grooves on their meaoea right faces, their peripheries, and their left faces as follows: Cam disk 16, right face groove operates take-up, peripheral groove operates feed slide, left face groove operates thread lifter; cam disk 17, right face groove operates presser foot to release and clamp during feeding and stitching, peripheral groove moves looper forward and backward, left face groove operates awl; cam disk 18, right face two grooves operate needle and thread hook below the work, peripheral groove operates looper to move in and out, left face two grooves operate needle guide and shuttle. The complete cycle ofoperations in each stitch may be as desired or substantially as is usual.

Coming now to the features involved in the control of the operation and stopping of the machine which constitute the present invention, I would state that broadly speaking the invention is for effecting the stoppage of asuitably actuated running member, such as the main shaft (from which stitching operations are effected), at a predetermined stage in the stitch cycle, through means, as a lever, operable at will, to render inoperative the actuating mechanism; this result being accomplished by a shifting controller or speed gear and connections by which the controller is shifted to neutral or stopping position; such connections being actuated (when operatively connected) by a running part, such as the rotating main shaft, which thereby effects its own stoppage. Specifically the improvements oomprise in combination, first, a rotating member such as the main shaft 13 from which stitching operations are effected, second, mechanism such as a power shaft and intermediate connections, for rotating such main shaft, third, mechanical connections actuable from the main shaft for rendering inoperative the shaft rotating mechanism, these connections being normally inoperative during the running of the machine so that the shafts rotation is continuous, and fourth, a suitable means, for example a. hand or knee lever, for at will rendering operative the connections referred to, from the main shaft to the rotating mechanism. By this combination, when the last mentioned lever is thrown, the connections from the main shaft are rendered operative, so that the main shaft then effects the machines stoppage by rendering inoperative its own rotating mechanism. And by this improvement is secured the ability to invariably predetermine the point at which the main shaft will come to rest. The controller shifting connections preferably comprise for simplicity a progressive (spiral or helical) cam engageable by a stud and disengageable therefrom at will.

Referring now to the mechanism for rotating the main shaft 13, this may be driven by a pulley shaft or power shaft 41 upon which is a loose pulley 42 and a fast pulley 43, enabling the shaft to be driven by belt, and bearings 45, 45 may properly support the shaft standing in a forward and rearward direction as shown. Intermediate the shafts 41 and 13 and comprised as a part of the rotating mechanism for the latter, is'a variable speed controller or change gear which might take any form but is shown as comprising a cross shaft 46, driven by a friction disk and wheel. The friction disk 47 is shown mounted at the forward end of power shaft 41, and a spring 48 is prov ded pressing the disk 47 forward to hold it in engagement with friction wheel 49, the latter being engaged upon the cross shaft 46 by means of a spline or key 50, enabling the wheel to be adjusted laterally across the face of the disk from the peripheral position shown to a central or neutral position, and preferably beyond that to a reversed position enabling the reversal of the machine under certain circumstances. The cross shaft 46 may havebearings 51, 51 and may extend toward the right beyond one bearing and be provided with a bevel gear 52 serving as a convenient means for transmitting rotation to the main shaft 13 located at the top of the machine. An upright shaft 53 having a bevel gear at each end is a convenient means of communicating the power from bevel gear 52 to-a similar bevel gear 54 secured on the right hand end of main shaft 13. Thus with the described parts adjusted as shown the continued rotation of the power shaft causes a uniform and continuous rotation of the main shaft during which the normal stitching operations proceed, for example, around the edge of a shoe sole.

Referring more particularly to the controller or variable speed device 47, 49, it will be seen that the purpose thereof is to afford a neutral position and at least one operating position, so that if the friction wheel 49 is shifted from its operative position illustrated, to its central or neutral position, the machine will be brought to a stop. I prefer that this controller shall be in the form of a variable speed gear as shown, and this is extremely important in the operation of the device for several reasons, among which is the fact that the natural slowing down of the parts when power is decreased is accompanied by a gradual shifting of the controller through all the intermediate stages of speed, and the controller during the shifting of the friction disk across the wheel actually serves as a brake to assist the reduction of the speed of the main shaft, so that the two readily and harmoniously cooperate as the machine passes from full sped to a zero speed or inoperative position.

Further points of importance in this arrangement will be made apparent hereinafter.

As before stated, the power mechanism for rotating the main shaft is adapted to be rendered inoperative by connections from the main shaft itself, such connections being normally inoperative during the shafts rotation but adapted when brought into operation to effect the shifting of the friction disk 49 toward neutral position, and finally to neutral position to secure the stoppage of the machine. For these purposes I prefer I that the connections from the main shaft to the variable speed controller shall be disconnectible, and in fact normally disconnected but adapted to be reconnected at will; and in order that the connections may be such as to secure the stoppage of the main shaft always at a predetermined point, I prefer that the connections include a device such as a cam engaged by a follower, which cooperate to the desired end. Such a cam or grooved disk 69 having groove 70 is shown driven by the main shaft 13 and adapted to shift the speed controller to neutral position by the following train of mechanism. The friction wheel 49 is shown as having a flange or collar 55 for the purpose of affording a grooved connection with a half sleeve 56 formed upon a slide 57 which is uided in its right hand and left hand movements by a guide 58. Connected to the slide 57 is a rod 59 which extends leftwardly and carries at its left end a rack 60 which engages alarger pinion 61 upon a short shaft 62 which also carries a smaller pinion 63, engaged by a vertical rack 64 formed at thelower end of a vertical rod 65 which is normally pressed upwardly by a spring 66 contained in a barrel 67, which also serves as a sliding bearing for the rod. At the upper end of the rod 65 is an up and down moving member in the form of a cam follower 68 consisting of a stud adapted to engage in the groove 70 of the disk 69 already referred to.

Referring to Fig. 2, the preferred form of groove 7 0 in disk 69 is illustrated. The disk and stud are adapted to be relatively shifted, namely by sliding the disk on its shaft 71 for the purpose of engaging and disengaging them, and the disk is adapted to be continuously rotated when the machine is running by means of teeth 72 on its periphery, cotiperating with a toothed gear 73 secured on the main shaft 13. The gear 73 is shown half the diameter of toothed disk 69 in order that, as will hereinafter appear, the driving shaft may make two complete rotations dur ing the operation of slowing down, while the disk makes a single complete rotation. In 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 inthe groove 74 is the stud on one arm of a bell crank lever 7 6, its other arm being connected by a downwardly extending rod 77 having a stud at its lower end engaging the inclined groove of a reciprocating cam 7 9 carried by-the left end of a swinging cam lever 80. I Vith such an arrangement, as the operator moves his knee to the right the cam lever 80 is swung so that the cam 7 9 moves forward thus lifting the rod 77 and shifting the disk 69 to the right.

The operative movement of the follower G8 is partly across the face of the cam disk (39, preferably in a radial direction from the center of the disk. Thus the normal position of the follower is its-highest position, as shown in Fig. 2, slightly below the center of disk 69. To assist the engagement of the follower (38 with thegroove the lat ter is provided with a concentric portion corresponding with the followers normal position. Thus the groove is shown as concentric from its inner extremity 81 for about a half revolution to the point 82. The groove is thereafter eccentric from the point 82 to the outer extremity 83 of the groove, so that the follower is forced downwardly, that is outwardly, until it reaches the terminus of the groove. It will be understood that during this downward movement of the follower the friction wheel 49 is being shifted and the outer extremity of the spiral cor responds with the neutral. position of the friction wheel, so that the moment the follower reaches its lowest position the parts areall brought to a standstill. Since the disk (39 is twice the size of the gear 73, and since the disk is always in one position when the parts come to rest, it follows that the driving shaft 13 will always be in the one predetermined position and thus the main object hereof is accomplished. It willbe noticed that the eccentric portion of the spiral 70 from the point 82 to the point 83 is substantially a complete turn, so that when the knee lever is pressed and when the followerIBS has dropped into some part of the concentric groove portion, the stitch then being formed will be completed and one further complete turn of the disk or two further complete stitches will also be produced as the machine slows down. This is extremely more advantageous than a stoppage within the brief time of a fraction of a single stitch, because more easily and effectively performed, and being less sudden is also less injurious to the running parts of the machine. Obviously in some cases instead of allowing for two complete turns of the main shaft, it might be arranged that one complete turn or three complete turns or other number would occur between the stitch being formed and the stoppage of the machine.

The natural friction of the machine would cause it to stop before many revolutions, but the extent would be variable and indeterminate, whereas with the structure de-' scribed the shifting of the variable speed controller and its braking action cooperat' ing with the friction of the parts serves to easily and effectively bring the machine to a stop in the precise period of two complete stitches (after the completion of the stitch being performed) and as before stated, in the precisely correct part of the stitch desirable for facilitating the extraction of the work.

In some forms of machine it is found desirable or necessary when stopping the machine and taking the work out to run the shaft by hand to a certain point and then back it up to a slight extent for reasons that will be familiar to those acquainted with the use of a machine of the type described in my aforesaid application. In order to automatically effect this action, the grooved disk 69 may be replaced by a grooved disk 91, Fig. 5, wherein the groove has, as before,

its inner concentric portion "from point93 to point 94:, and an eccentric portion or spiral from point 94 to point 96. The groove is then shown as continuing also cccentrically beyond from point 96 to point 95. Point 96 corresponds with the neutral position of the variable speed controller. lVith this arrangement if the parts are adjusted so that the main shaft will rotate slightly beyond the final stopping point, there will be caused a shifting of the friction disk 49 beyond the neutral point and thereby a slight reversal of the main shaft until the parts immediately again come to rest and in neutral position. In any form that the spirally grooved disk may take the groove may, if desired, be provided with a spring resisted buffer 98 in order to break the shock if contact should accidentally occur.

The above described will be sufficiently understood from the description. The operation is merely that when the operator throws the knee lever to the right the main shaft completes its rotation and a given number of further complete rotations, and is then brought to stop in a definite position, namely, as the cams are designed, with the thread lock or wheel 30 unlocked, and with the needle 25 and awl 26 both disengaged from the'work. Thus the operator by lifting the presser foot with the treadle 32, can at once extract the work and the machine is in condition for inserting a new piece of work. \Vhile the machine might be restarted in any suitable way, an effective and operation of the machine herein' easy starting is permitted in the combina- The knee lever when thrown to the left separates the cam disk 69 and follower 68. The spring now acts, not suddenly but gradually moving the friction wheel across the disk, as the rotation of the latter permits,

v The running member or shaft 13 which has a definite relation to the stitching mechanism, namely, one rotation to a stitch; the driving mechanism, connected with the shaft for actuating it and having associated with it an adjustable controller, variable speed controller having full-s eed position, stop position and interme iate positions; and stopping connections adapted to be actuated from'the shaft and adapted to adjust the controller to stop position, namely by a progressive adjustment through intermediate positions to stop position, these connections being normally inoperative so that the machine may stitch, and preferably constructed, for example, with a cam and follower device, to cause the complete slowing and stoppage of shaft and machine during a predetermined extent of shaft movement or rotation and to bring the stitching mechanism to rest at a predetermined point in the stitch cycle. The fourth element is the means for rendering the stopping connections operative at suitable times, for example, by a lever operated at will, whereby the shaft thereupon effects adjustment of the controller to bring about its own stoppage,

it doing this progressively by a self-controlled slowing down, which brings the machine to rest with no jar, shock, wear or noise. The speed change is substantially in a decreasing geometrical progression, with easy reduction toward the stopping point, yet the entire stopping action in a high speed machine is apparently instantaneous. The novel principles giving these advantageous results have applicability and utility in other than sewing machines but in this application the same are claimed only in their particular and useful aspect involved in sewing machines. Indeed, the more special utility of the present improvements is in the particular machine illustrated which is a high-speed lock-stitch wax-thread shoesole sewing machine in which the stitching mechanism comprises cooperating needle and awl and in which the final stoppage is eifected at such point in the cycle that the needle and awl are both disengaged from the work.

It will thus be seen that I have described a machine attaining the objects and advantages thereof. While I have described the broadly there maybe namely a same in detail, the main principles and features of the improvement maybe embodied in various forms and different details, so that I do not wish to be restricted to features or details excepting as set forth in the ap ended claims. it hat I claim and desire to secure by Letters Patent is:

1. In a sewing machine the combination of stitching mechanism, a running member from which said stitching mechanism is actuated with a definite relation between the stitch cycle and the members motion, driving mechanism connected with said running member for actuating the-latter, an adjust able controller associated with said driving mechanism adapted, when shifted, to both cause a cessation of driving and apply a stopping or braking force upon the running member, stopping connections adapted to be actuated from said running member and adapted to adjust said controller to stop position, such.stopping connections being normally ino erative during the stitching operations 0 the machine, and means for rendering said stopping connections operative at suitable times whereby the running member thereupon efiects adjustment of said controller to bring about its own stoppage, and thereby to bring the stitching mechanism to rest at a predetermined point in the stitch cycle.

2. In a sewing machine the combination of stitching mechanism, a running member from which said stitching mechanism is ac-" tuated with a definite relation between the stitch cycle and the members motion, driving mechanism connected with said running member for actuating the latter, controlling means. operable at full speed, stop and 1ntermediate adjustments to cause a decrease of driving action and apply a stopping or braking force upon the running member. stopping connections adapted to be actuated from said running member and adapted to adjust said controlling means to stop position, such stopping connections being normally inoperative during the stitching operations of the machine, and means for rendering said stopping connections operative at suitable times whereby the running member thereupon efi'ects adjustment of said controlling means to bring about its own stoppage.

3. In a sewing machine the combination of stitching mechanism, a running member from which said stitching mechanism is actuated with a definite relation between the stitch cycle and the members motion, driving mechanism connected with said running member for actuating the latter and having associated with it a variable speed controller having full-speed, stop and intermediate positions, stopping connections adapted to be actuated from said running member and mg mechanism comprising cooperatingl till.

adapted to progressively adjust said controller from full-speed through its intermediate to stop position, such stopping connections being normally inoperative during the stitching operations of the machine, and means for rendering said stopping connections operative at suitable times whereby the runnin member thereupon efifects adjustment 0 said controller to progressively bring about its own slowing down and stop- P 4. In a sewing machine the combination of stitching mechanism, a running member from which said stitching mechanism is actuated with a definite relation between the stitch cycle and the members motion, driving mechanism connected with said running member for actuating the latter and having associated with it a variable speed controller having full-speed, stop and intermediate positions, stopping connections adapted to be actuated from said running member and adapted to progressively adjust said controller from full-speed through its intermediate to stop posltion, such stopping connections being normally inoperative during the stitching operations of the machine, and means for rendering said stopping connections operative at suitable times whereby the running member thereupon efi'ects adjus ment of said controller to progressively bring about its own slowing down andstoppage; said stopping connections comprising a cam and follower device constructed to cause the complete slowing and stoppage during a predetermined extent of running member movement and to bring the stitching mechanism to rest at a predetermined point in the stitch cycle.

5. In asewing machine the combination of stitchin mechanism, a running member from whic said stitching mechanism is actuated with a definite relation between the stitch cycle and the members motion, driving mechanism connected with said running member for actuating the latter and having associated with it a variable speed controller havin full-speed, stop and intermediate positlons, stopping connections comprising a cam and follower device adapted to be actuated from said running member and adapted to progressively adjust said controller from full-speed through its intermediate to stop position, such stopping connections being normally inoperative during the stitching operations of the machine, and a stop-lever for at will rendering said stopping connections operative, whereby the running member thereupon effects adjustment of said controller to progressively bring about its own slowing down and stoppage.

6. In a high-speed wax-thread leather sewing machine the combination of stitchneedle and awl, a running member from which said stitching mechanism is actuated with a definite relation between the stitch cycle and the members motion, driving mechanism connected with said running member for actuating the latter and having associated with it a variable speed controller having full-speed, stop and intermediate positions, stopping connections adapted to be actuated from said running member and adapted to progressively adjust said controller from full-speed through its intermediate to stop position, such stopping connections being normally inoperative during the stitching operations of the machine, and means for rendering said stopping connections operative at suitable times whereby the running member thereupon effects adjustment of said controller to progressively bring about its own slowing down and stoppage with the needle and awl disengaged from the work.

7. In a sewing machine the combination with stitching mechanism, of a running member from which stitching operations are effected, mechanism for actuating said member, and means for at will rendering said mechanism inoperative and causing said member to thereafter stop after a predetermined number of stitches are formed and at a predetermined stage in the stitch. cycle.

8. In a sewing machine the combination with stitching mechanism, of a running member from which stitching operations are eifected, mechanism including a variable speed gear for actuating said member, and means for at will eifecting the automatic shifting of said gear to neutral and thereby causing said member to stop at a predetermined position.

9. In a sewing machine the combination with stitching mechanism, of, a running member from which stitching operations are effected, a shiftable controller having operating and stopping positions, mechanism extending from said controller to said member for actuating the latter, means actuable from a running part of the machine for shifting said controller to stopping position, and means for at will rendering said controller shifting means either inoperative or operative, to permit the actuation of said running member on the one hand or on the other hand to effect its stop-page in a predetermined manner] 10. In a sewing machine the combination with stitching mechanism, of a running member from which stitching operations are effected, a shiftable variable speed controller having operating and stopping positions, mechanism extending from said controller to said member for actuating the latter, means actuable from a running part of the machine for shifting said controller from normal speed position through its decreasing speeds stopping position, and means for atwill rendering' said, controller shifting means either inoperative or operative, to permit the act-uatiomofrsaidorunning memer on the one hand or on the other hand to effect its stoppage in manner.

11. In a sewing machine the combination with stitching mechanism, of a running member from which stitching operations are effected, a shiftable variable speed controller a predetermined having operating and stopping positions,

mechanism extending from said controller to said member for actuating the latter, means actuable from a running part of the machine for shifting said cont-roller from normal speed position through its decreasing speeds to stopping position, said controller shifting means being normally inoperative when the machine is running, and means for at will rendering operative said controller shifting means.

12. In a sewing machine the combination with stitching mechanism, of a running member as a main shaft from which stitching operations are effected, mechanism for driving said running member, stopping connections adapted to be actuated from said running member for adjusting said driving mechanism to inoperative adjustment, such stopping connections being normally inoperative during the running of said running member, and means independent of the said running member for rendering said stopping connections operative whereby said running member thereupon eifects adjustment of said driving mechanism to bring about its own stoppage.

13. In a sewing machine the combination with stitching mechanism of a running member as a main shaft from which stitching operations are efiected, mechanism for actuating said member, a controller having at least one operating position and a stopping position for controlling the operation and stopping of said member, connections normally inoperative during the running of said member but actuable from said member for adjusting said controller to stopping position, and means for at will rendering said connections operative.

14. In a sewing machine the combination with stitching mechanism, of a running member as a main shaft from which stitching operations are effected, mechanism for actuating said member comprising a variable speed controller, connections actuable from said member for adjusting said controller to inoperative position, said connections being normally disconnected, and means for at will reconnecting said connections. i

15..In a sewing machine the combination with stitching mechanism, of a running member as a main shaft from which stitching operations are effected, mechanism for actuating said member comprising a variable speed controller,

connections actuable from said member for adjusting said controller to inoperative posit-ion comprising -a cam driven by said member and a follower normally disengaged from said cam, and means for at'will engaging said cam and follower.

16. Ina sewing machine the combination with stitching mechanism, of a running member as a main shaft from which stitching operations are effected, mechanism for actuating said member comprising a variable speed controller, connections actuable from said member for adjusting said controller to inoperative position comprising a progressive cam and a follower normally disengaged, and means as a lever for at will engaging said cam and follower.

17.. In a sewing machine the combination with stitching mechanism, of a running member as a main shaft from which stitching operations are efi'ected, mechanism for actuating said member comprising a variable speed controller, connections actuable from said member for adjusting said controller to inoperative position comprising a cam driven by said member and a follower normally disengaged from said cam, and means for at will engaging said cam and follower; the driving of the cam being eflected by a gear on said member engaging a gear on said cam the latter having a multiple of the number of teeth of the former gear.

18. In a sewing machine the combination with stitching mechanism, of a running member as a main shaft from which stitching operations are effected, mechanism for actuating said member comprising a variable speed controller, connections actuable from said member for adjusting said controller to inoperative position comprising a progres sive cam and a follower normally disengaged, and means as a lever for at will engaging said cam and follower by a relative movement of the cam toward the follower.

19. In a sewing machine the combination with stitching mechanism, of a running member as a main shaft from which stitching operations are effected, mechanism for actuating said member comprising a variable speed controller, connections actuable from said member for adjusting said controller to inoperative position comprising a cam having a concentric followed by an eccentric surface and a follower adapted to engage such surfaces successively, and means for at will rendering operative such cam and follower connection.

20. In a sewing machine the combination with stitching mechanism, of a running member as a main shaft from which stitching operations are efiected, mechanism for actuating said member comprising a variable speed controller of the friction wheel and disk type, connections actuable from said member for adjusting said controller to inoperative position, said connections being normally disconnected, and means for at will reconnecting said connections.

21. In a sewing machine the combination with stitching mechanism, of a running member as a main shaft from which stitching operations are effected, mechanism for driving said running member, stopping connections adapted to be actuated from said running member for adjusting said driving mechanism to inoperative adjustment, such stopping connections being normally inoperative duringthe running of said running member, and a device for at will rendering said stopping connections operative whereby said running member thereupon effects adjustment of said driving mechanism to bring about its own stoppage.

22. In a sewing machine the combination with stitching mechanism, of a running member as a main shaft from which stitching operations are efiected, an adjustable device located separate from said member or shaft for driving said running member, stopping connections adapted to be actuated from said running member for rendering inoperative said drivingdevice, such stopping connect-ions being normally inoperative during the running of said running member, and means for at will rendering said stopping connections operative whereby said running member thereupon effects adjustment of said driving device to bring about its own stoppage. I

In testimony whereof I affix my signature in presence of two witnesses.

AUGUST R. SCHOENKY. Witnesses:

THOMAS J. OARTY, E. PAUL SoHoLz.

Images