US1581500A

US1581500A - Transmission mechanism for sewing machines

Info

Publication number: US1581500A
Application number: US679063A
Authority: US
Inventors: John P Weis
Original assignee: METROPOLITAN SEWING MACHINE CO
Current assignee: METROPOLITAN SEWING MACHINE CO; METROPOLITAN SEWING MACHINE Corp
Priority date: 1921-06-28
Filing date: 1923-12-07
Publication date: 1926-04-20
Anticipated expiration: 1943-04-20

Description

April 20 1926. 1,581,500

J. P. WEIS TRANSMISSION MECHANISM FOR SEWING MACHINES Origi l Filed June 28, 1921 4 SheetsSheet l INVENTOR.

. BY W v TTORN s April 20 1926.

J. P. WEIS TRANSMISSION MECHANISM FOR SEWING MACHINES Original Filed'Jun 1921 u 4 Sheets-Sheet 2 "53K TORN WW w ll I.

J P WEIS TRANSMISSION MECHANISM FOR SEWING MACHINES Original Filed June 28, 1921 April 20 1926.

April 20 1926.

J. P. WEIS TRANSMISSION MECHANISM FOR SEWING MACHINES 'original Filed June 28. 1921 4 Sheets-$11661. 4

v v INVENTOR. k/JH/YR M15.

Patented Apr. 20, 19216.

UNITED 'STAT1ES PATENT OFFICE. 1

JOHN P. WEIS, OF NYACK, NEW YORK, ASSIGNOROF ONE-HALF TO METROPOLITAN SEWING MACHINE CORPORATION, OF NYAGK, NEW YORK, A-CORPO R ATI O'IN OI JDEL A- WARE.

Original ap lication filed June 28, 1921, Serial No. 481,032. Divided andthis application filedDecember TRANSMISSION MECHANISM ron SEWING MACHINES.

'7, 1923- Serial No. 679,063.

To all whom it may concern:

Beit known that 1, JOHN P. "VVEI'S, a citizen of the United States, -residingat Nyack, in thecounty of Bockland and State of New York, have invented certain new and useful Improvements in Transmission Mechanism for Sewing Machines, of which the following is a specification.

This invention relates especially to improved transmission mechanism for the driving shaft of a machine, such as sewing machine, and more particularlyfto improved stop clutch mechanism for controlling the rotation of the drive shaftsothat the shaft can" be started and stopped at will and readily and efficiently controlled.

A further object, of this invention isto provide improved mechanism for driving and transmitting power to the main shaft of a machine which is adapted to be operated at very high speeds, and wherein-the machine can be stoppedandstarted instant- 1y or as rapidly or slowlyas desired without undue noise, shock or vibration and wherein the improved construction requires a minimum amount of care, adjustment, replacement and oiling.

A further objectof. this invention isto' provide a high speed automatic machine,

such as a sewing machine, having an improved drive or crank shaft constructionfor operating the various mechanisms of the machine, and having improved clutch 'mechanism for stopping and starting the shaft. In the present instance the driving shaft comprises a detachable stop clutch section adapt-ed to-be readily detached fromthe main section of the shaft and removed to enable parts of the clutch mechanism to be replaced or changed.

This application is a division of my copending application for sewing machines, .liled June 28, 1921, Serial No. 481,032.

Other objects of this invention will app ear'in the following description and appended claims, referencebeing had to the accompanying drawings forming. apart of the specification whercinlikereference charactersindicate corresponding parts the several views. and wherein Fig. l is a side elevation of thefmachine with the end-cap. or

cover of the looper mechanism shown in dotted lines, and the transmitter shown in operating position under the machine, but detached fronrthe-wcrktable to more clear- 1y illustrate the relation of the transmitter with the sewing machine; Fig. 2 is a top plan view-of the transl'nitter shown in Fig.

'1; Fig. 3 is a front perspective iew of the sewing machine, transmitter and treadle connected for operating the same; Fig. 4 1s a perspective view of the hand wheel-and its shaft having clutch teeth in the end for turningthe mechanism of the machine by hand; Fig. 5 is a back elevation of the machine, illustrating the connections for the needle drive and a port-ion of the looper and ;feed actuating mechanisms;F-ig. 6 is a perspective view showing the inside .wall Ofthe back cover plate-with the stop motion lever and its connecting parts assembled thereto; F g. '7 1s a vertical section taken through the vertical center line of the crank shaft bearing, showing the crank shaft, the assemblage of the clutch wheelwith aportion of the stop motion -mechanism, the clutch -hand wheel for turning the-1neohanism of the machine by hand, theframe of the machine being represented by broken lines; F gs-8 -IS a transverse section taken substantially on line 88 of Fig.7, and shows particularly the stop clutch balls in a clutched position; Fig. 9 is a viewsimilar to Fig. 8, but shows the stop clutchballs in a non-clutching position; Fig. 1 0 is a detail view-of the actuatingrod' for the stop =n1echanismgltakenon lines 1 i1tof Before explaining in detailthe present improvement and mode of operation thereof, I desire to have it understood that the invention is not limited to the details of construction and arrangement of parts which are illustrated in the accompanying draw ings, since the invention is capable of other emloodiment and that the phraseology which I employ is for the purpose of description and not of limitation.

Referring particularly to Figures 1, 3, 5, 7, and 13, it will be seen that the present machine is mounted on a suitable table. 1

I and comprises a machine frame of special

construction having flanges

2 and 3 for supporting and securing the machine to the table. The main portion of the frame is preferably of hollow rectangular construction, closed at the bottom and having a front wall 4, and a rear wall 5 provided with an opening 6 adapted to be closed by a cover plate 7 attached thereto in any suitable manner. This cover plate has a hollow projection 8 within which operates a stop lever 113. The outline or Shape of the opening 6 is irregular in form and is indicated at 6", 6 6,

closed seal the opening against leakage of oil.

As shown in Figure 13 the rear wall 5 is inclined to the left of the perpendicular, an advantage thereof being to assist in properly conducting the lubricant from one interior part to another and to finally conduct it into the reservoir formed by the bottom 9 and

side walls

4, 5, 13, and 16 of the frame. To empty the reservoir I provide a drain pipe 10 tapped into the bottom 9. The front wall 4 is provided with a boss 11, bored to receive the cylinder 12. The side wall 13 is provided with a boss 14 to receive one of the crank shaft bushings 15. The opposite side wall 16 has a projecting rib 17 parallel to the wall 4, curved at 18, and provided with two bosses 19, the rib extending down the opposite side, parallel to the rear wall 5 as at 20, Figure 13.

Located on the side wall 16 near the bottom is a boss 21, forming together with the bosses 19 a suitable seat for the belt guard 22 which covers the drive belt 23, and the clutch and pump wheels 93 and 425.

The side wall 16 has a rectangular opening 24 into which projects the laterally extending portion 118 of the stop lever, Figure 12, this opening also affording a passage for the lubricant returning from the outer bearing 25 of the bushing 99 carried by the belt guard 22, Figures- 5 and 7. Above the opening 24 in the side wall 16 is an inwardly P jeoting bos 26 1 g; t receive bushings 101 and 101a f supportingvhs crank shaft. The Rp On of the frame ah t the 26 is indicated at 27 and thd be Wall or the frame at 28, igure 7, wherein ta 1 needle casing 31.

Projecting from the wall 4 is an overhanging arm 32 terminating in the needle bar and presser bar bearings 33. Above these bearings is a rectangular opening 34 through which the presser spring and lifter lever operate. This overhanging arm 32 is provided with

suitable bearings

37 and 38 for the needle operating rock shaft 39. By means of suitable connections fully described in my above mentioned application the rock shaft 39 is connected to the needle bar 48 which reciprocates in bearings 33. The needle bar 48 is hollow and the lower end is tapped to receive a needle holder 50 which carries needles 51. The rear end of the rock shaft 39 is connected to the upper end of a ball connection 59, the lower end of which having a ball socket fitting over the ball 61 of the crank shaft.

With reference particularly to Figures 5, 10, 11 and 7 the crank shaft comprises bearing

portions

62 and 63, the bearing 62 being integral with the crank disc 64 and the ball 61. The crank 65 is integral with the ball 61 and the portion of the shaft63, the crank shaft 66 is also integral with the shaft portion 63 and with a ball 67, and the crank disc 68 is

integralwith balls

67 and 69, the latter forming a part of the'shaft portion 7 0, shown in section in Fig. 7. The end portion 62 of the crank shaft is provided with a series of clutch teeth-72 to co-act with other clutch teeth 73 carried by a stub shaft 7 4 secured to a hand wheel 75 adapted for the purpose of turning the crank shaft and operating the mechanism of the machine by hand, if desired the shaft 7 4 is provided with a reduced neck 76 for the reception of the coiled spring 77 carried in the annular groove 78 of the bushing 15. The position of the spring with respect to the shaft neck 7 6 is such as to normally hold the clutch teeth 73 out of engagement with the clutch teeth 72, the contraction of the spring on the edge 79 of the neck tending to draw the shaft outward. Thus when. the hand wheel 75 is forced inward by the hand of the operator to, engage the clutch teeth for turning the shaft, the spring 77 is forced out of the neck and is expanded so as to cause the same to embrace the edge 79. When the inward pressure of the hand upon the wheel is removed, the contraction of the spring draws the shaft to a position where the spring enters the neck 7 6, disengaging the clutch rotating during the operation of the machine.

From the foregoing it will b'eund'ersto'od that I have provided a means, inqthe form of a hand clutch wheel whereby the mechanism of the machine may be're'adily turned by hand, such means-being easily detachable from themachine by Withdrawing thesame as illustrated in Fig. 4. This feature is of considerable importance as it avoids the rotating of the'hand wheel each time'the machine is started; thus saving considerable power, and obviating the necessity of stopping the Wheel since the same'in the present machine is disconnected from the shaft at the time of starting and'stopping and during the operation of the machine. In order to quickly start and stop a mechanism that is operated at a high speed such as three or four thousand revolutions per minute, all unnecessary weight and bulk of rotary parts must be eliminated. An important advantage of this improved machine resides in the elimination of the Weight of the usual hand wheel in operation and the centrifugal force set up thereby, whereas if the wheel were directly connected to the shaft it would be very diflicult, if not impossible, to bring the parts operating at such high speeds to a dead-stop instantly, without excessive wear and tear on-the mechanism:

The usual sewing machine is provided with ahand Wheel which is grasped by the hand of the operator at the end of each stitching .operation. The wheel is then turned to raise the needle to aposition of rest to permit the removal of the work.

This continuous stopping andturnin'g of the hand wheeldurlng the rapid operatlon of the machine becomes a laborious taskcas it must often be repeated thousands of times daily, thereby consuming a considerable part of the operators time. Inmany instances ten to twenty percent of the time'consumed in= stitching operations is'spen-t' in manipu lating the hand wheel. In the present machine this stopping of the machine and turning of the wheelby han'd-tobringthe'needle at rest in its highest position is obviated by virtue of the provision of a positive stop motion, in the present instance the same embodying certain improvements over my Patent No. 1,352,333 dated September 7, 1920. A detailed description of these stop motion parts is deemed unnecc'sary since the same are fully described in the aforesaidpatent.

Referring particularly to Figs. 5, 6, 7, 10, 11, 12and13 it will be seen that the portion of the'slia'ft is drilled at to receive the reduced'end 7-1 of the stopclutch shaft. A portion of the shaft extension 70 is enlarged to form the semi-circular key-way 81 which extends the entire length of the hole 80 and receives a semi-circular key 82 formed as an integral part of the reduced portion 71 of the stop clutchshaft; The telescoping of these parts provides a convenient way of hubs 95 and 96.

eonnectingthe parts for quick. coupling and uncoupling, it is necessary at times to withdraw the stop clutch shaft in order to Adjacent to the end portion 70 of the.

crankshaft, and be-tn' een the faces of the

bushings

101 and 101, is located a collar as provided with a hole 87', and a key way 8?, adap'ted'toreceiv'e and embrace the'end 71 of the stop clutch shaft for rotary movement therewith. The bushing 101 is recessed to receive the collar 86 so that the faces of the two bushings are flush with each other, thereby limiting the movement of the collar. A coil spring 87 is carriedin a groove 88 terminating'at 87 on one side of t'hecenter line of the shaft hole 87, see Figure 10, and on the other side terminating at 87 The groove has two openings 87 "and'ST' thrOugh the rear wall of the collar 86, and through these openings'the end of the spring 87 may be seen when assembling the parts, as one endof the spring abuts against the end 87 While the other end exerts pressure against a pin 89 projecting through-the opening 87 and secured to and ca'rr iedby a rockable stop clutch sleeve90.

The stop clutch sleeve 90 is bored to fit over the reduced end portion 71 of the stop clutch shaft and such bore is also provided with a semi-circular hey-wayto fit over the semi-circular key 82. The enlarged section of the stop clutch shaft is provided with three radially disposed pockets betinto which are loosely seated segmental wedge blocks 83 which receive wedge'balls 91. The sleeve is bored to fit over the enlarged portion 85 ofthe stop clutch shaft and such portion is provided with three apertures, each of which carries aball 91. The key-way of the sleeve being larger than the key'permits the sleeve 90 to be rocked on the shaft by spring 87, as hereinafter described, sufiicientlytocause the three balls 91 to shift from a low non-clutching position on the wedge blocks 88 as illustrated in Fig. 9, toa clutching position where theballs are projecte'd outwardly to grip the .ball race 92 carried by the clutch or driving Wheel 93,

as illustrated in Fig. 8. The clutch wheel 93 is provided with a belt groove 94.. and is made intwo sections having respectively The hub 95 operates in the bearing 97 while the hub 96 operates in the bearing 98, so that the pull of the belt on the wheel 93 is taken up by these two bearings. The bearing 97 is formed'in the bushing 99, carried by the boss 100 of the belt guarc 22, and also forms an end bearing for the enlarged end portion 85 of'the stop clutch shaft. One end portion of the stop clutchsleeve 90 extends into :the hubs 96 and 95 of the clutch-Wheel and the opposite end portion thereof has a bearing in the bush ing 101, supported in the boss 26 of the machine frame. This bearing is also in the form of a bushing and is provided with a cut-out 102 which ext-ends up from the bottom for the. entrance of a stop finger. This out-out registers with an eccentrically formed stop tooth 1.03, (see Fig. 13) formed in the clutch sleeve 90. Directly above the cut-out or opening 102 is located a brake shoe 104 which operates in an opening 105 at the top of the bushing 101 against the stop clutch sleeve 90. A spring 106 is carried between a screw collar 108 and a shoulder 109 of a presser plug 107, and exerts downward pressure thereon, the shoulder 109 resting directly on the brake shoe.

The opposed surfaces of the presser plug and brake shoe are cut out forming aspace between them to receive the free end 11.0 of the brake lifting lever 111 adapted to rock on a stud screw 112. The free end of the brake lifting lever 111 is provided with a, segmental or arcuate face 113 centered substantially at 11.4, Figure 13. (Jo-acting with the curved surface 113 is an anti-friction roller 115, secured by a shoulder screw 116, to an upstanding arm or projecting member 117 of a. stop lever 118, mounted on conical screws 119 tapped into the side wall of the projecting portion 8 for pivot-ally supporting the stop lever 118, the screws 119 forming a fulcrum for the stop lever. A stop finger 120 is connected by a joint pin 121 tothe free end of the stop lever, the upper end 122 co-acting with the stop clutch tooth 103, and the lower end 123 coacting with the oil buffer indicated generally at 124 which is supplied with oil from a reservoir 125, formed as a part of the stop lever.

To overcome the falling weight of the free end of the stop lever 118, a spring 126 attached at one end 127 to the inside wall of the cover plate 7 is secured as at 128 to it will be seen that the stop lever 118 is provided with a rectangular opening 129, within which is pivotally secured a sleeve 130 by

screws

131 and 132. The reduced end 132 of the screw 132 is somewhat longer than the reduced end 131 of the screw 131 so as to project through the wall of the sleeve and ride freely against the flattened face 133 of the push and pull rod 134, so that the end of the screw may engage the shoulder 135 of the flattened face 133 upon the predetermined downward travel of the rod.

The lower end of the rod 134 is connected as at 138 to an extension 137 passing throu h a guide aperture in the flange 3 and also through the work table 1, see Fig. 1,

and is freely and slidably held in 'an elonmovement of the rod 137 in conjunction with lever 139 is obtained, the slot 140 permitting the necessary play or lost motion between the parts.

Referring particularly to Figs. 1, 2 and 3 it will be seen that the power transmitter consists of a main bracket 143 secured to the under surface: of the table 1 in any suitable manner, the bracket having an arm bored to receive a shaft 144. Upon this shaft is mounted a cone pulley 145 over which operates the belt 146 for transmitting power from any suitable line shaft to the pulley. ihis pulley 145 is provided with a frictional surface 147, co-acting with a similar frictional surface 148 of the driven pulley 149 also carried by the shaft 144. The belt 23 is driven by the pulley 149 for operating the sewing machine. A bracketed lever 150 is carried by the rock shaft 151 supported in the arm 152 for rocking movement, and the forwardly projecting end 153 of the lever 150 has a suitable angular or camming face adapted upon rocking the lever inwardly to exert inward pressure on the cone pulley 145 thereby to force the

frictional surfaces

147 and 148 together so as to clutch the

pulleys

145 and 149 for retation.

The shaft 151 has rockably supported thereon at 154 the lever 139, provided with a stud 155 to which is connected the upper end of a rod 156, the lower end being connected by a coupling 157 to a rod 158 connected to a floor treadle 159, whereby the transmitter may be operated in order to control the speed of the machine.

A brake lever 161 is also secured to the shaft 151, and the arm 152 is provided with a lug 162 having a spring 163 interposed between it and a lug 164 carried by the brake lever 161. The latter is provided with a frictional surface 165 to engage therim 166 of the pulley 149 in order to quickly stop the pulley each time the rod 156 is thrust upward to shut off the power. Attached to the bracket 1.43 is a projecting member 167 carrying a stud shaft 168 upon which ro tates an idler pulley 169, which directs the upward run 170 of the belt 23 to the clutch wheel 93.

For regulating the speed of the pulley 149 and the speed of the sewing machine an adjusting screw 171 and lock nut 172 is provided, the screw being tapped into the lever 139 as shown in Figs. 1, 2 and 3. The inner end of the screw engages the lever 150 and by adjusting the screw 171 inwardly the

frictional surfaces

147 and 148 are brcu' ht together with greater pressure se that creased speed is obtained. Byreversing the adjustment the p ressure on the frictional: sure faces is decreased and slippageresults so that the speed of'the pulley 149' and the sewing machine isthereby reduced; This speed regulation is of great-importance when operating upon difficult work, and-particularly when an inexperienced operator; is at the-machine, inasmuch as without a speedr regulator the machine is liable to; start; at-1 the-highest speed andqthe operator would" lose control of the work. With thepres ent; improvement the requisite speed may Joehad by simple adjustment of 'the'parts 'den scribed to' suit the desired:- or necessary conditions.

The lever 150and the-r bralgelever 161 are secured to the rock-shaft lfiland; hence a down-ward;pressure of; the rod 156 swings the brake lever 161 away from the rim 166 somewhat before the-frictional surfaces are brought firmly together. Areverseactionof the rod 156 of course causes the frictional surfaces toseparate priorto the ieiiective op,- eration of the brake lever 161 against the rim 166. Thus when the treadle ispusheddown and the outerv end'of the lever 139 is-shifted downwardly, the; pulleys 1&5 and lQwill be clutched togetlier'therehy; causingth-e transe mitter to impart movement to-thebelt inthe direction of the arrows shown in Fig, 1,. so as to rotate the 'clutchwheel- 93 .1 This operation will take place prior=te any aetu-v ation of the stop lever 118 by virtue of'the fact that during the initial downward movement of red 18 1 thescrew 1 32 ridesinthe groove or fiat surface 133:- Uponv a further downward movement of the foot treadle and the rod 156 connected therewith, the push 3 and pull rod let-137 will be shifted downwardlyto a-positionavhere the shoulder 135 will strike the screw-132 and swing; the lever 118 downwardlyon the pivotsu119' thereby shifting; the stop finger 122 out o't'engagement with the clutch tooth 103. Simultaneously with this movement the roller. 115

which is normally at rest above ando-ut of contactwith the brake lifting lever: 11-1,, s shifted into engage'n'ient-with the corner 115 of the lever, thereby swinging the-lever on the studscrew 112,,li-fting the pressure plug,

10? slig l'itly against the tension ofrthe spring 106, and releasingthe friction of the brake shoe lflon the sleeve-90. This operation permits the spring 87 which is undertension to rock the sleeve 90 relatively to the shaft 71, thereby shifting. the'balls into a clutching position, at-which time the crank shaft is caused torotateto start the machine.

It hasbeen foundinpractice" that. whereas in the present case the inachine is controlled from the treadle 159 by the-,operators foot, and where the brake-or pressure plug, lifting; lever 111and stop; lever 118 are constructed substantially as inmy aforesaid Patent.

derone adj Listinent provides a means Where;

#1,352,338;breaka e of certain. of thepart s,

I particularlythe lifting lever, often; occurs due to the aecidentalush-ifting of the, stoplever toovfar downward such being ordi- I na-rily impossible when: the same islinechanically. and automat-ically cont-rolled: There forein order to avoid such disadvantages, the lifting lever. 111: iii-the present. instance isprovidedwith thesegmental portion" 113:

concentric. withrthe plane, of :movement of" the roller 115 about the -pivotal.,axis of-ftlieq stop, lever. The stop lever is furthermore.-

opcrated bythexrodl 1% intermediate thestopv fingerand the fulcrum 11,9: Fig. r.13,),1 thereby facilitating a positive voperation. and greater: compactness: of structure, Thus (af terthe roller, as herei'nbefore stated, engages the corner to, shift or 's wingrtli'e l'eveiif a 111 downwardly during any further, de'wjuward movement of the stop. leverlIS the

roller

11,5 WiIlJnerelIy travel' 'ovei the curved-- surface 113 thus maintaining the leverlllin a, constant. position without any fiu'therfl swingingmovementthereof; v I

From the foregoing it Will be und111sto'ed' that: the speed regulator. 111 not only 130;

'vides a means forcontrolhngthe speedfat In suchcase the machine willfstart instantly at maximum speed, whereasimdjer the-other adjustments the machine will start gradually, at varying speeds until it reaches then'iaXimumispeed; Thus itwill bese'en that Ilia-vs provided a means fOrvarying the speedof the machine froinithe minimum to the maximuni for controlling'the speed at which the machine is started and stopped" and for starting and stopping instantaneously at any vspeed without shock.-

Although, the power transmitter herein shown-and, described in connection withtlre present, improved machine is a desirablelpreferred operatinginstrumentality, it is of: course understood that any other transmission may be, used without departing from the spirit off the iuventiun, or if desired under, the particular circumstances the clutch wheel may be operated direct from a line shaft. In that case the. clutch wheel will.

be-in constant" operation and the machinewhen started will always operate at a predetermined speed;

It will be noted in the present machine that the rod 134 is utilized not only; for

operating the transmitter and the clutch mechanism thereof, as well a as the stop mechanism for the crank shaft but also to lift the presser foot 188 of the machine. The upper end of 136 of this rod is adapt-ed to engage the free end 177 of a. rock lever 17 1 which is pivoted at 175 to a bracket 176. The opposite end 178 of this rock lever overhangs the r'ear end 179 of the presser foot lifting lever 180 which is pivoted at 181 to the overhanging arm 32 of the machine frame. The opposite end of the presser foot lifting lever extends through an opening 34 in the bearing 33 and is connected to the presser bar 183 which is adapted to reciprocate in a bushing 187 carried by the bearing 33. The construction and operation of this mechanism is fully described in my aforesaid application and therefore a further description thereof is not deemed necessary herein.

It will be noted that by making the crank shaft in two sections so that the stop clutch shaft is separate and detachable from the main crank shaft, an important advantage is derived over a construction wherein the shaft is made as one part. By virtue of this improvement the necessity of removing many parts is avoided when changing or replacing the cam block, and as a result no skill is required merely to remove the bushing 99 and draw the stop clutch shaft outward with the fingers. Thus the changing of the cam block and re-assemblage is quickly accomplished, as all other parts are so arranged as to remain in their working position while the shaft is removed or being replaced. A groove or slot 84 is provided in the enlarged section '85 of the stop clutch shaft in order to provide clearance of the wedge balls 91 when withdrawing the shaft section 85.

It is to be understood that by describing in detail herein any particular form, structure, or arrangement, it is not intended to limit the invention beyond the terms of the several claims or the requirements of the prior art.

Having thus explained the nature of my said invention and described a way of constructing and using the same, although without attempting to set forth all of the forms in which it may be made, or all of the modes of its use.

I claim:

1. The combination of a rotary shaft, means for transmitting power thereto and including clutch mechanism for stopping and starting said shaft, said clutch mechanism including a driven clutch member, a movable stop cooperating with said clutch member to engage and disengage the clutch mechanism, means for controlling the operative movement of said stop, said shaft having at its end a detachable section connected thereto for rotation, and a detachable bearing for said section to permit removal thereof.

2-. The combination of a driven shaft, means including clutch mechanism for stopping and starting said shaft, said clutch mechanism including a driven clutch member adapted to be connected to said shaft, a

movable stop cooperating with said driven clutch member to engage and disengage the clutch mechanism, means for controlling the operative movement of said stop, said shaft terminating at one end in a removable section cooperating with said clutch mechanism and shiftable relatively thereto, and a detachable end bearing for said section to permit removal thereof. 8

3. The combination of a supporting frame, a rotary shaft comprising a main portion and a detachable end section connected together for rotary movement, an end bearing carried by said frame within which is journaled said detachable section, said bearing being detachable to permit removal of said section, and stop clutch mechanism for stopping and starting said shaft.

4. The combination of a pair of connected shafts located in alinement and one thereof comprising a detachable clutch shaft, clutch mechanism for starting and stopping said shafts and including a'driving clutch member and a driven clutch member, shiftable grippmg means cooperating with sand members, and means for permitting detachment of said clutch shaft endwise from the other shaft and relatively to said gripping means.

5. The combination of a main shaft and a detachable stop clutch shaft connected thereto for rotary movement therewith, clutch mechanism cooperating with said stop clutch shaft for stopping and starting the same, said clutch mechanism including a driving clutch member adapted to be connected to the shaft, a movable stop cooperating with said clutch mechanism to engage and dis engage the clutch member and driving means, and means for permitting detachment of said stop clutch shaft endwise relatively to said clutch mechanism.

6. The combinat on of a main shaft and a stop clutch shaft connected thereto and adapted to be detached therefrom, means for transmitting power thereto and including clutch mechanism cooperating with said stop clutch shaft for stopping and starting the same, said clutch mechanism including a clutch member and shiftable gripping means located between the clutch member and shaft, and means for permitting detachment of said stop clutch shaft endwise relatively to said gripping means.

7. The combination of a pair of connected shafts located in alinement and one thereof comprising a detachable clutch shaft, clutch mechanism for starting and stopping said shafts and including a driving clutch memher and a driven clutch member, shiftable gripping means cooperating with said members and located in recesses in said shaft, and means for permitting detachment of said shaft endwise from the other shaft and rela tively to said gripping means.

V 8. The combination of a pair of connected shafts located in alinement and one thereof comprising a detachable clutch shaft, mechanism for starting and stopping said shafts, a machine frame for housing said clutch shaft against access, and adetachable bushing carried by said frame at the end of said clutch shaft to permit access thereto whereby said shaft may be detached endwise from the frame and relatively to said clutch mech-- anism. v

9. The combination of a pair of connected shafts located I in alinement and one thereof comprising a detachable clutch shaft, mechanism for starting and stopping said shafts, a machine frame for housing said clutch shaft against'access, and removable means for permitting access to the end of said clutch shaft to permit the same to be; drawn endwise from the frame relatively to said clutch mechanism. 7

10. The combination of a machine frame, a rotary shaft, a detachable shaft connected in alinement to said shaft and housed within said frame, clutch mechanism for starting and stopping said shaft, and means removable from the outside of the frame for permitting access to'the end of said detachable-shaft, said detachable 1 shaft being, shi-fta-ble relativel; to said clutchmechanism.

11. The combination of a mainshaftand a stop clutch shaft connected thereto and adapted to be detached therefrom, clutch mechanism cooperating with said stop clutch shaft for stopping and starting the same,

said clutch mechanism including a driven clutch member, azstop lever, a movablestop carried: thereby and: adapted to cooperate with saiddrivenclutch member for engaging and disengaging the clutch mechanism, means for shifting said stop lever and stop into and out of operative position relative to theclnt'ch mechanism, and braking mechanism cooperating with said driven clutch member.

12.- The combination of a main shaft'and a stop clutch shaft connected thereto and adapted to-be detached therefrom, clutch mechanism cooperating with said stop clutch shaft for stopping'and starting the same, said clutch mechanism including. a driven clutch member adapted tovbe connected to a shaft, a stop lever, a movable: stop carried thereby and adapted tocoope-rate withsaid driven clutch member for engaging and dis; engaging the clutch mecha'msm, means/for shifting saidstop lever and stop'into and out of operative position relative to the clutch mechanism, and braking mechamsnr cooperatmg with salcl driven clutch member and controlled by said stop leveru 13'. The combination of a main shaft and a stop clutch shaft connected thereto and adapted to be detached therefrom, means for transmitting power to said driving means,

clutch mechanism cooperating with said clutch member, and cushioning means carried by said stop lever and cooperating with said stop.

14. The combination of amain shaft and a stop clutch shaft connected thereto and adapted to be detached therefrom, clutch mechanism cooperating with said stop clutch shaft for stopping and starting the same, said clutch mechanism including a driven clutch member, a stop lever, a mov-c able stop carried thereby and adapted-to cooperate with said driven clutch member for engaging and disengaging the clutch mechanism, means for shifting said stop lever and stop into and out of operative position relative to the clutch mechanism, brakin mechanism cooperating with said driven clutch member and controlled by said stop lever,andcushioning means carried by said stop lever and cooperating with said stop.

15. The combination of a rotary shaft, a stop clutch shaft adapted to be connected thereto for rotary movement therewith, neans for driving the same and including a clutch mechanism cooperating with said stop clutch shaft for stopping and starting said main sl iaft, said clutch mechanism includmg a crlven clutch member, a swinging stop lever, a stop finger carried thereby and cooperating with said driven clutch member, braking mechanism cooperating with said driven clutchmember, and'means for limiting the-movement of said braking mechanism independently of the movement of the stoplever. a

16. The combination of arotary-shaft, a stop clutch shaft adapted to be connected thereto for rotary movement therewith, means for driving the same and including clutch meclmnism cooperating with said stop clutch shaft for stoppingand-starting said main shaft, said clutch mechanism including a driven clutch member, a swinging stop lever, astop finger carriedthereby and co,- operating withsaid driven clutch member,

braking mechanism cooperating. with said driven clutch member and controlled by said stop lever, and means for limiting the movement of' said braking mechanism independently of the movement of the stop lever.

17. The combination of a rotary shaft, a stop clutch shaft adapted to be connected thereto for rotary movement therewitlnsaid stop clutch shaft beingshiftable relative to said main shaft for independently detaching the same, clutch mechanism cooperating with said stop clutch shaft for stopping and; starting said main shaft, said clutch mechanism including a driven clutch member, a swin ing stop lever, a stop finger carried thereby and cooperating with said driven clutch member, braking mechanism cooperating with said driven clutch member, and

means for limiting the movement of said braking mechanism independently of the movement of the stop lever.

18. The combination of a rotary shaft, a stop clutch shaft adapted to be connected thereto for rotary movement therewith, clutch mechanism cooperating with said stop clutch shaft for stopping and starting said main shaft, said clutch mechanism including a driven clutch member, a swinging stop lever, a stop linger carried thereby and co operating with said driven clutch member, cushioning means carried by the stop lever and cooperating with said stop, braking mechanism cooperating with said driven clutch member, and means for limiting the movement of said braking mechanism independently of the movement of the stop lever.

19. The combination of a rotary shaft, a stop clutch shaft adapted to be connected thereto for rotary movement therewith, clutch mechanism cooperating with said stop clutch shaft for stopping and starting said main shaft, said clutch mechanism including a driven clutch member, a swinging stop lever, a stop linger carried thereby and cooperating with said driven clutch member, braking mechanism cooperating with said driven clutch member and controlled by said stop lever, and means for limiting the movement of said braking mechanism independently' of the movement of the stop lever, and comprising a member carried by said stop lever and cooperating with a part of said braking mechanism for shifting the same, said braking mechanism having a curved coacting portion concentric with the axis of said stop lever.

20. The combination of a main driven shaft, a stop clutch shaft adapted to be connected thereto for rotary movement therewith, power transmitting means concentric with said stop clutch shaft, clutch mechanism' cooperating with said stop clutch shaft for stopping and starting said main shaft, said clutch mechanism comprising driving and driven clutch members, a swinging stop lever, a stop finger carried thereby and cooperating with said driven clutch member for engaging and disengaging the same, braking mechanism cooperating with said driven clutch member and controlled by said stop lever, and means for limiting the movement of said braking mechanism independently of the movement of the stop lever, and comprising a roller car ied by said stop lever and cooperating with a part of said braking mechanism for shifting the same, said braking mechanism having a curved coacting portion concentric with the axis of said stop lever.

21. The combination of a machine frame, a rotary shaft, a detachable shaft connected in alignment thereto, mechanism for stopping and starting said shafts, bearings for said shafts carried by said frame, andmeans for permitting removal of said detachable shaft from the outside of the frame and relatively to said bearings.

22. The combination of a machine frame, a rotary shaft carried thereby, a detachable shaft section telescoped with said shaft and normally connected thereto for rotary movement, a bearing for said shaft section carried by the frame, and mechanism for starting and stopping said shaft, said shaft section being detachable from the outside of the frame by shifting the same relatively to said shaft and bearing.

23. The combination of a machine frame, a rotary shaft, carried thereby, a detachable shaft section normally connected to one end of said shaft for rotary movement therewith, a detachable shaft section adapted to' be connected to the opposite end of said shaft a hand wheel carried thereby, and means for causing said second shaft section to be normally disconnected .from said shaft.

24:. The combination of a rotary shaft comprising a pair of sections keyed together to permit shiftable movement of one section relatively to the other, means for transmitting power to the shaft and including stop clutch means cooperating therewith for step ping and starting the same, one of said shaft sections being shiftable endwise thru said clutch means to disconnect the shaft section.

25. The combination of a rotary shaft comprising a pair of telescopic sections keyed together, a driving wheel mounted on one of said sections, and clutch means between said driving wheel and last section, the latter being shiftable endwise relatively to the clutch means to detach the same.

26. The combination of a rotary shaft, means for transmitting power to said shaft and including stop clutch mechanism for stopping and starting the same, a movable stop lever adapted to cooperate with said clutch mechanism, and means for operating said stop lever, said means engaging said stop lever and having a movement therewith to operate the same and also having a predetermined moveme nt relatively to thestop lever without-operating. the same.

27. The combination of a rotary shaft, stop" motion control means cooperating therewith for stopping-2 and starting. the

same and comprising clutch mechanism, a

stop lever. and a stop'finger carried thereby, all adapted to cooperate with said clutch mechanism, and means for operating said stop lever, said lattermeans comprising a member having; at predetermined shiftable movement relative to: said i stop .lever and havingmpait adapted to engage said stop lever forrmovement therewith.

28. The-'combination-iofa a .rotaryVsha-ft', mechanism 1 for starting, and-stopping said shaft and includingra swinging-stop lever shiftable relativelyv to said shaft-for! controlling the-starting-and stoppingof the shaft, and means'for swinging said stopl lever: and comprisinga rod 'engageable with said lever and having alost-motion connectiorr there'- with to cause therodin its initial movement to shift: relatively 'to the: stop 'lever'without swinging the lever and-in its subsequent movement to swingthe stop lever V relatively to the shaft.

29. The. combination of a rotary shaft, stop clutch mechanism for starting and stopping the same and including a shiftable stop lever, a power transmitter for transmitting power to said shaft and including clutch means, treadle controlled means for operating said clutch means and having a lost motion connection with said stop lever for operating the lever subsequent to the operation of said clutch means.

30. The combination of a rotary shaft,

cooperating with the shaft, a power transmitter having a driving connection with said shaft, said transmitter including a driving clutch member and a driven clutch'member, and a common treadle operated means adapted to be shifted for engaging said clutch members and for operating said stop mechanism subsequent to the engagement of said clutch members. I

31. The combination of a rotary shaft, a driving wheel carried thereby, clutch means for connecting said wheel to the shaft, stop mechanism cooperating with said clutch means, a power transmitter comprising a power driven wheel, a belt drive connecting said wheels, brake means for said power driven wheel, clutch mechanism, for connecting said power driven wheel with a source of power, treadle means for operating said clutch mechanism, and means for adjusting said clutch mechanism independently of said treadle means to vary the speed at which .said shaft starts to rotate.

' 32. The combination of a rota shaft, clutch mechansim carried by said s aft for stopping and starting :the same, .a shiftable operating, memberfor said I clutch mechanism, a power transmitter for. transmitting power to said shaftand comprising,:ax'pairv of clutch members, .anoperatingmember for said clutehw members, and -a common means for shi-ftingeach of saidoperating members, and. for shifting said second named operating. member-'prior tothe-other:

33h The combination of a rotary shaft, a clutch wheel thereon, .clutch -mechanismfor connectingsaid wheel to P the shaft, stop mechanism for operating said :cl-utclr mechanism, a power transmitter including" a clutch: wheel: having; a driving connection with said first-clutch wheel,-said transmitter also including clutch mechanism for'connecting said second clutch wheel-witlra source of power, and ai-common treadle operated means for operating. saidi second" clutch mechanism" and having: alost-motion confor operating saidstop mechanism subsequent thereto.

35. The combination of a rotary shaft, stop clutch mechanism therefor and comprising a shiftable stop lever a presser foot lifting lever,.a shiftable operating member engageable with said stop lever for shifting the same and having means for shifting said lifting lever and a treadle for operating said member.

36. The combination of a rotary shaft,

stop clutch mechanism therefor and comprising a shiftable stop lever, a presser foot lifting lever located above said stop lever, and a shiftable rod slidably engaging said stop lever to move relatively thereto at one time and to shift the same at another time, and a treadle for operating said rod, said rod having an extension located in position to operate said presser foot lifting lever.

37. The combination of a rotary shaft, a driving member carried thereby, clutch mechanism between said driving member and drive shaft, means for controlling said clutch'mechanism, brake means for the shaft controlled by said last means and means for limiting the movement of said brake means independently of the movement of said last means.

' SSKThe combination of a rotary shaft, stop clutch mechanism therefor and comprising a stop lever, brake means for said shaft,'means carried by said stop lever for operating said brake means, and a treadle operated member for shifting said stop lever and thereby said brake means, said memher having a lost-motion connection with the stop lever to permit independent shifting of the member Without shifting the stop lever and brake means.

39. The combination of a rotary shaft, stop clutch mechanism therefor and comprising a stop lever, brake mechanism for said rotary shaft, means for operating the brake mechanism from the stop lever and means for limiting the movement of the brake mechanism independently of the movement of the stop lever.

40. The combination of a rotary shaft,

stop clutch mechanism therefor and comprising a stop lever, brake mechanism for said rotary shaft, means for operating the brake mechanism from the stop lever and means for limiting the movement of the brake mechanism independently of the movement of the stop lever, said latter means comprising cooperating members carried by the brake mechanism and" stop lever, one member having a part formed concentrically with the pivotal axis of the stop lever.

4:1. The combination of a rotary shaft, clutch mechanism carried thereby for stopping and starting the" same, a sh'iftable' operating member for said clutch mechanism, brake mechanism for the shaftoper ated by said operating member, a power transmitter for transmitting power to said shaft and comprising a pair of clutch members, an operating member for said clutch members, brake mechanism cooperating with one of said clutch members and controlled by said last operatingmember, and a common means for shifting saidlast operating member prior to the other.

42. The combination of a rotary shaft, clutch mechanism for starting and stopping the same, brake means for said shaft, a lever for controlling said brake means, and a treadle rod having a lost-motion connection With said lever to permit independent shiftable movement of the rod prior to the operation of said lever.

Signed at Nyack, New York, this 1st day 7 JOHN nvvnis.

' of December, 1928.