US1298758A - Driving and stopping mechanism. - Google Patents

Description

' W. C. MEYE.R.-

DRIVING AND STOPPING MECHANJSM.

APPLICATION FILED FEB. 28. 1916. 1,298,758.,

Patented 1, 1-919.

4 SHEETSSHEET 1.

. rnE NORRIS Psasns 60., Pnn'rc-urna. WASNIMcmN. .4.

I W. 0'. MEYER. DRIVING AND STOPPING MECHANISM.

APPLICATION FILED FEB. 28. 1916. 1,298,758. Patented Apr. 1,1919.

4 SHEETS-SHEEIZ.

. W as 'fiweztion APPLICATION FILED FEB. 28. I916.

Patented Apr. 1,1919.

4 SHEETS-SHEET 3- "It uumzls vases cu. Pnnmumm, WASHmcnm. .1

W. C. MEYER. DRIVING AND STOPPING MECHANISM.

APPLICATION ,FILED FEB. 28. 1916'.

Patented Apr. 1, 1919,

4 SHEETSSHEET 4 WILLIAM C. MEYER, OF BEVERLY, MASSACHUSETTS, ASSIGNOR, BY MESNE ASSIGN- MENTS, T UNITED SHOE MACHINERY CORPORATION, OF PATERSON, NEW JERSEY,

A CORPORATION OF NEW JERSEY.

DRIVING AND STOPPING MECHANISM.

. Specification of Letters Patent.

Patented Apr. 1, 1919.

Original application filed July 29, 1913, Serial No. 781,785. Divided and this application filed February 28,

1916. Serial No. 80,908.

To all whom it may concern:

Be it known that I, WILLIAM C. MEYER, a citizen of the United States, residing at Beverly, in the county of Essex and Commonwealth of Massachusetts, have invented certain new and useful Improvements in Driving and Stopping Mechanism; and I do hereby declare the following to be a full,-

clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

The present invention relates to driving and stopping mechanisms, and more particularly to driving and stopping mechanisms adapted for use in high speed machines.

The objects of the invention are to improve the construction and arrangement of 2 driving and stopping mechanisms, and to produce novel and improved mechanism which will act in a uniform and reliable manner to bring the parts of the machine to rest at a predetermined point in a cycle of operationswithout undue shock, jar or vibration, andwithout subjecting the parts to excessive strain.

With these objects in view the invention contemplates the provision, in a driving and stopping mechanism of the novel. features set forth in the following description and pointed out in the claims, tl1e advantages seured by which will be readily understood and appreciated by those skilled in the art. The features of the invention are illustrated as embodied in a driving and stopping mechanism of the type comprising a high speed driving mechanism for driving the machine during its normal operation, and a slow speed driving mechanism which is automatically thrown into operation as th machine is disconnected from the high speed driving mechanism, and acts first to reduce the speed of the machine to the speed of the slow speed driving mechanism, and then to drive the machine atslow speed to stopping position. When the machine arrives at the predetermined point at which it is to be stopped it is automatically disconnected from the low speed driving mechanism and its movement is arrested by suitable devices. Certain features of the invention relate particularly to improvements in the mechanism for disconnecting the machine from the. slow speedadriving mechanism and arresting its movement. The invention also comprises various other improvements in the construction, arrangement and operation of parts of driving and stopping mechanisms. v The present invention is a division of an application Serial No. 7 81,785, filed July 29th, 1913, for a shoe; sewing .machine, upon which Patent No. 1,177,581, dated March 28, 1916, was granted and the driving and stopping mechanism is illustrated in the present application as applied to the shoe sewing machine disclosed in said patent. It

is to be understood, however, that the invention is not limited in its application to shoe or other sewing machines, but that it may be applied with advantage to various other types of machines. The invention will be readily understood from an inspection of the accompanying drawings and the following detailed description of the construction illustrated therein.

In the drawings, Figure 1 is a view in side elevation of a shoe sewing machine provided with a driving and stopping mechanism embodying the invention in its preferred form;

' Fig. 2 is a view in horizontal section taken through the base of the machine; Fig. 3 is a sectional View taken on substantially the line 33 of Fig. 1; Fig. 41 is a view, partly inside elevation and partly in section, of the parts shown in Fig. 3. looking from the left; Fig. 5 is a sectional view taken substantially on the line 5-5 of Fig. 4 Fig. 6 is a sectional view taken substantially on the line 66 of Fig. 5; Fig. 7 is a detail sectional view illustrating the vibratory lever and cooperating locking bolt. and certain devices for controlling the engagement of the locking bolt with the lever, all of which constitute parts of the stop mechanism; and Fig. 8 is a view similar to Fig. 7,illustrating certain of the parts in different positions.

In the drawings, the invention is illustrated as appliedto a shoe sewing machine of the so-called McKay type. The machine is'provided with a straight hook needle and devices cotiperating therewith to form a chain stitch seam, a rotatable work supporting horn arranged to extend within the shoe, and a presser foot cotiperating with the horn to support the work in operating position. The operating parts of the machine are driven from a main or cam shaft 24, and the driving and stopping mechanism is arranged to drive this shaft at a relatively high speed during the sewing operation, and when the seam is completed, to slow down the rotation of said shaft and finally arrest its movement at a point in a cycle of operations when the needle is retracted from the work and the presser foot is free to be lifted to permit the wprk to be removed.

. During the sewing operation, the machine is driven by means of a belt 20 passing about a pulley 22 fast on the main shaft 24 of the machine, and connecting said pulley with a pulley 26 mounted upon a driving shaft 28 located in the base of the machine. The shaft 28 is provided with a loose pulley 30 and with a pulley 32 splined thereto but movable longitudinally thereof, which is driven by a belt from the power shaft. The pulley 26 is loosely mounted on the shaft 28 in front of the pulley 32, and is provided with a ring 34 of friction material for engagement with the adjacent surface of the pulley 32. A' fourth pulley 36 is pinned to the shaft 28, and the pulley 26 carries a second ring 38 of friction material for engagement with the adjacent surface of the pulley 36. The shaft 28is arranged for longitudinal movement in its bearings, and when said shaft is thrust endwise toward the rear of the machine, the pulley 26 is clutched between the opposed faces of the pulley 32 and pulley 36 and thereby caused to rotate with said pulleys. When the shaft is released and allowed to move forwardly or toward the front of the machine, the loose pulley 26 is carried out of clutching engagement with the pulleys 32 and 36. The shaft is actuated to clutch the pulley 26 between pulleys 32 and 36 by suitable connections from a treadle 40 pivoted at the base of the machine. Said connections comprise a bell crank lever pivoted on a stud 42 and provided with an arm 44 which engages the end of the shaft 28. The other arm 46 ofthe bell crank lever is provided with a forked forward extremity which embraces a: rod 48, which is the rod for controlling the device for throwing the stop mechanism into operation. The rod 48 is connected at its. lower end with a lever 50, which lever is arranged tobe actuated" from the treadle. A collar 52 is secured to the rod 48 above the arm 46, and the rod 48 is yieldingly held in raised position by the coiled spring 54. The treadle 40 is pivoted on a horizontal stud 56 carried by a block mounted on a vertical swivel pin 58. This manner of mounting the treadle permits the treadle to be swung vertically and horizontally. The rearwardly extending arm 64 of the treadle is provided with a lateral projection '60 which is adaptedto engage beneath the forward end of the lever 50. When the projection 60 is beneath the end of the lever 50, and the treadle is depressed, the rod 48 is moved downwardly and actuates the bell crank lever 44-46 to thrust the shaft 28 rearwardly and thereby clutch the pulley 26 to the shaft and start the machine into operation. When the forward end of'the treadle is released, it is lifted by a coiled spring 62, allowing the rod 48 to be liftedby the spring 54 to release the lever 44-46. The shaft may then move forward to release the pulley 26 from clutching engagement with pulleys 32 and 36: The lateral movement of the rearwardly extending arm 64 of the treadle is limited by the engagement of the end of the arm with stops 66 and 68. These stops are so placed that when the treadle is swung horizontally to bring the end of the arm 64 into engagement with the stop. 66, the projection 60 will be brought beneath the lever 50, and when the treadle is swung in the opposite direction to bring the end of the arm 64 into engagement with thestop 68 the projection 60-will be away from be neath the lever 50. To prevent the actuation of the treadle when the treadle is in an intermediate horizontal position a for wardly projecting lug 7 0 is formed between the steps 66 and '68 on the bracket which supports the lever 50.

In order to permit the work to be removed when the seam has been completed,

and another piece of work to be introduced easily and quickly, the machine is provided with mechanism for automatically arresting the rotation of the shaft at the point in the cycle of operations when the needle is retracted out of engagement with the work and the presser-foot is free to be lifted. lVhen the treadle is released at the end of the sewing operation, the mechanism which brings the machine to rest with the parts in proper positions for the removal of the shoe is thrown into operation. This mechanism comprises a friction clutch, one member of which is driven at slow speed in a for ward direction, and which, when the'clutch members are engaged, first acts as a brake to slow the main shaft down to the slow speed of the forwardly driven member, and then to drive the main shaft at slow speed in a forward direction to bring the devices which finally arrest the rotation of the shaft into engagement. The friction clutch consists of clutch members 72 and 74, of which the member 74 is loosely mounted on the main shaft 24 of the machine, and is driven at slow speed in the same direction as the normal direction of rotation of the shaft 24, by means of a spiral pinion or worm 76,

- the machine.

by the longitudinal movement of the ro jecting extremity 0 amounted on a hollow shaft or sleeve 78 jourshaft of the machine through a friction clutch connecting said shaft with a pulley 84 which is driven by means of a belt 86 connecting said pulley with the pulley 36 mounted on the driving shaft at the base of The clutch connection etween the shaft 78 and the pulley 84 consists of a clutch member 88 secured to an preferably formed integral withithe shaft 78, and a second clutch member 90 carried by the pulley 84. The pulley 84 is journaled upon a rod or shaft 92 extending through the hollow shaft- 78, and is confined betweencollars carried by the rod, as clearly shown in Fig. 5. The clutch members 88 and 90 are engaged and disengaged within the hollow shaft, as will be presently explained. A brake is provided to arrest the rotation of the" shaft 78 and the pinion 7.6 when the clutch connecting said shaft with, the pulley 84 is disengaged. This brake comprises a friction brake member 94 mounted on the shaft 78 to rotate with said shaft. The brake member 94 is connected with the hollow shaft by a pair of blocks or keys 96 secured by screws to the member 94 :and arranged to project inwardly through slots 98 in the adjacent portion of the'hollow shaft. The brake member 94 is arranged to be engaged with the interior of a brake shoe 100 formed on the frame of the machine when the rod 92 is moved in a direction to disengage theclutch. The.in ner ends of the blocks 96 extend inwardly to points adjacent to the reduced portion 102 of the rod 92, and the brake member is normally held in position on the rod with the blocks in engagement with the shoulder 104 by acoiled spring 106 surrounding the reduced portion of the rod, and engaging the member 94 outside of the hollow shaft 78, said spring being confined between the member 94 and a collar or washer108 held by a nut threaded on the end of the rod.

The members of the friction clutch are held normally in engagement by means of a second coiled spring 110 surrounding the reduced portion of the rod, and arranged within the coiled spring 106. The coiled spring 110 engages at its inner end the prof the hollow shaft 78, and acts to maintain the members 88 and 90 of the friction clutch normally in engagement, and. the brake member 94 normally disengaged from the brake shoe. In order to disengage the clutch and engage the brake, the rod 92 is moved longitudinally to nally of the sleeve mentsf116, which receive between them speed-of the main the parts rotating the left (Fig. 5.) This movement of the rod first compresses the coiled spring 110,

but vdoes not affect the coiled spring 106 .until the friction clutch is disengaged and the members of the brake are brought into engagement, since the spring 106 holds the blocks .96 against, the shoulder 104, and the brake member 94moves withthe shaft 78. Further longitudinal movement of the rod, however, after the brake is engaged, causes the-compression of both springs, which then serve, to engage the members of the brake with considerable pressure. When the rod is released, the springs act together to carry d it back in the opposite direction. until the shoulder .104 on the-rod .ends of the blocks 96, after which, by the engages the inner force of the spring 110, the brake member 94, the rod and the spring 106, are moved to the right together a slight-distance, sufficient, however, to disengage the brake and engage the clutch.

The-clutch member 74 is secured to and d preferably formed integral with a sleeve 112 mounted loosely on the main shaft 24 and extending from sai of. i the machine,

"clutch member toward the rear end of the shaft. The clutch member 72 is secured to .a flange extending outwardly from a sleeve 114 loosely journaled on the sleeve 1 12. The sleeve 114 is free to move longitudithe. pulley 22. In the construction illustrated, the sleeve is provided with a pair of spaced shoulders or abutan The arc-shaped lug 118 on the pulley 22.

sleeve is normally held in position longitudinally of the shaft with the clutch members out of engagement by means of a coiled spring 120 surrounding a bolt 122 passing through a hole in the pulley 22 and secured in the sleeve 114, said spring being seated in a recess in the pulley 22, and acting against a washer held by a nut on thebolt.

When the clutch members are engaged, the member 74 atsuch time being driven at slow speed 111a forward direction, they first act as a friction brake to slow-down the shaft untilthe shaft and therewith are moving at the same speed as the member 74. The member 74 then acts as a driving member through itsv engagement with the clutch member 72 to drive the shaft in a forward direction until the devices which finally bring the shaft to rest are brought into engagenient. The clutch members are engaged at a definite point in a rotation of the shaft, and the shaft is finally brought to rest at the end of a definite interval after the clutch members are engaged. The mechanism for engaging the members 72 and 74 of the clutch comprlse a timing cam con- 112 and of the shaft 24, but is caused to rotate with the shaft by a connection with sisting of a cam groove 124, formed in the engage beneath a shoulder 162 on the slide sleeve 114 and engaged by a cam roll 126 140 and hold the locking pin from upward earried by an arm 128 of a bell crank leincvenient until the treadle rod has been ver p-ivotedon a shaft 130. The other arm raised sufli-eiently to leave the locking] pin 132 ofthe bell crank is provided with a refree tom'ove upward into secure locking en cess13'4 adapted to receive a projection 136 gagelnent with the recess in the arm of the at the upper end of a locking pin 138 which bell crank lever. The latch is disengaged is normally held out efengagement with the from the houlder by the movement of the arm 132, so that during the normal operaarin 152,dl1eto the lifting or the treadle rod. tion of the machine, 'the bell crank lever is A lost Inotidn connection is. provided heoseillated idly by the cam. The locking pin tween the arm and thetlat eh to allow the 138 is niouhted to slide vertically in the fortreadl-e rdd to be raised before the latch is Ward end of a slide 140 lnounted to slide disengaged from the shoulder 162. .In the horizentallyinsuitable guides in the frame, construction illustrated, the connection beand yieldingly held in forward position by tween the arm and the latch consists of a a 'coiled spring 142 interposed between a pair ofsholilders' formed on the hub of the shoulder en the slide and the end of a arm ad pted to engage correspondmg shoulscrew 144 threaded into the frame, by which ders on the hub of the latch. These shoulthe tension bf the spring may be adjusted. ders are arranged so that when the arm is he slide is provided with ektens'ien 146 moved in either direction thereis a certain projeeting rearwardly'therefroln through a amount of lost motion of said arm before suitable perforation in the portion of the the lateh is act-hated by the arm. When the frame in which the slide is Inonnted, and treadle is depressed; the arm 152 swings the forward movement of the slide in its down nntil One of the shoulders on its'hub guides is limited. by a nut 148 threaded on engagesthefopposed shoulder on the'hub of the extensien 146; By adjusting this nht, the latch, after which the continued downthe slidemay be adjusted to bring the leek- Ward movement of the treadle acts to draw in pin into a position such that the prothe locking pin down against the tension of jection 136 on the locking pin will register the spring 150; During this movement of with the recess 134 at the proper time in the the locking pin the latch slides down along retary movement of the main shaft. The the outer face of the shoulder 162 and finally coking pin fhfced upwardly in the slide swings inwardly beneath said shohlder. by a sen-ed spring 150 -seated in a recess in hen the treadle is released, the treadle rod the slide 140 and err-"agin the head of the first moves upwardly, swinging the arm 152 loeking pin,,afid the ewer end (if the pin is upwardly therewith without aifecting the co'nneeted with the treadle rod 48 sbthat the locking p111 until the shoulder on the hub pin is held down with the projection 136 of the arm engages the opposed shoulder on out of engagement with the reeess 134 while the hub-of the latch, The latch is then the treadle is depressed and the main drivswung outward from beneath the shoulder ing clutch engaged to drive the main shaft 162, leaving the locking pin free to be of the machine. forced upward by the, spring 150.

' When the projection- 136 on the locking Mechanism is provided for timing the en- .pin engages the recess 134 in the arm of the P'agement of the locking pin with the arm bell crank ever, the lever is no longer free T32 of the bell crank lever,'so that the lockto osci l'a't'e, since it is locked to the slide in'g pin Will not move into engagement with 1 140, and by the action of the cam groove said arm until the arm is in a position sub- 124 on the roll 126 carried by the arm of stantially suchtha't the recess 1 34 registers said lever, the clutch member 72 will be With the projection on the locking pin. This forced over'into engagement with the clutch insures a secure locking engagement bemember 74 when the roll engages a certain tv'veen the locking pin and the arm. This point; in the cam groove, which dccurs at a mechanism is illustrated particularly in definite point in the rotation of the main Figs. 7 and 8. The block 156 extends upshaft. After the clutch members have been wardly along the end of the slide 140, and a engaged, the slide 140 will be nioved rearsecond block 164 is pivoted to the block 156 Wardly in its guides against the tension of on a stud 166. The block164 is forced in a the spring 142 by the action of the cam direction to bring the said block up against groove 124 on t e bell crank -lever, and the the end v of the slide 146 by a spring 168 force with which the clutch members are coiled about the stud 166 and engaging a engaged will depend upon the tensidn of the pin secured in said block. A third block spring 142. p I 170 is pivoted on a stud 170* at the upper The treadle rod 48 is connected With an end of the block 164,- and is normally held arm 152 pivoted on a stud 154 mounted in a down against the upper end of the block lock 156 secured by a pin 158 to the lower 164 by a spring-pressed pin 172, the pointed end of the locking pin. A latch 160 is also extremity of which engages a recess insaid pivoted on the stud 154; and is arranged to block.- hen the locking pin is drawn down the block 164swings inwardly under the influence of the spring 168 and brings up against the end of the slide. The block 164 is provided with a shoulder 178 which is adapted to engage beneath a shoulder 180 formed on the forward end of the slide 140, when the block 164 is swung inwardly into engagement with the slide. The engagement of the shoulder 178- with the shoulder 180 prevents the locking pin from being forced upwardly while they are engaged. The block 170 projects above the upper face of the slide 140, and the arm 132 of the bell crank lever operates close to the upper face of the slide. .Vh'en the arm 132, during the oscillatory movement of the bell crank lever, arrives in a position such that the recess 134 registers with the projection 136, the arm.

132 strikes the innerface of the block 170 and pushes said block and the block 164 on which it is mounted, away from the end of the slide, thereby disengaging the shoulders 178 and 180, and permitting the locking pin to be forced upwardly to engage the projection 136 in the recess 134.

When it is desired to stop the machine without throwing the stop mechanism into operation, the block 170 may be swung about its pivotal connection with the block 164 by a manipulation of the arm 182 formed onsaid block, the block then being held in position by the engagement of the pin 172 in a second recess in the block. When the block has been thus positioned it will be out of the path of the arm 132 of the bell crank lever when the block 164 swings in against the end of the slide 140 to bring the shoulder 178 beneath the shoulder 180. The engagement of these shoulders will prevent the locking pin from being forced upward into locking engagement with the arm 132 of the bell crank lever, and the machine is then allowed to slow down gradually until it comes to rest.

The cam groove 124 is preferably timed so that the arm 132 of the bell crank lever is moved into a position to bring the recess 134 into registration with the projection 136 just as the roll 126 arrives at an idle portion of the camgroove, thereby allowing the shaft to rotate a certain interval after the projection 136 is engaged in the recess 134, before the clutch members are engaged. This permits the projection 136 to become firmly seated in the recess'134 before the 0am acts to engage the clutch members.

After the slow speed clutch members 72 and 74 are engaged and the shaft has been slowed down to the speed of the slow speed driving member 74, and while it is being driven at slow speed in a forward direction by said member, the stopping devices which finally bring the shaft to rest are brought into engagement. One of these devices is carried by one of the driven parts, and the shaft is disconnected from the driving mechanism and its rotation arrested by mechanism which is actuated by the movement of the positively driven stopping device. The clutch members 72 and 74 are still engaged when the main shaft is brought to rest, and the rotation of said shaft is arrested by disengaging the clutch which connects the hollow shaft 78 with the pulley 84 and engaging, the brake member 94 with the brake shoe 100 to stop the rotation of said latter shaft and the pinion 76. The stopping devices through the engagement of which the main shaft is finally brought to rest comprise a finger or shoulder 18'4 carried at the forward end of an arm 186 and adapted to be engaged by a projection or lug 188 secured to or formed integral with the flange on the.

sleeve 114. The arm 186 is mounted for movement to carry the shoulder 184 into and out of the path of the lug 188, and to this end is secured to a rock shaft 190 journaled inan arm 192 which is pivoted on a shaft 194. When the locking pin isin lowered position with the projection 136 out of engagement with the recess 134, the arm 186 is held down so that the shoulder 184 is out of the path of the lug 188 by a blocku196 secured to the lower end of the locking pin, which engages a roll 198 carried by an arm 200 secured on the rock shaft 190. When the locking pin is forced upward to engage the projection 136 in the recess 134, the arm 186 is swung upwardly to bring the shoulder 184 into the path of the lug 188 by a tension spring 202. Thearm 192 extends downwardly beyond the shaft 190 into position to engage the end of the rod 92. l/Vhen the lug 188 engages the shoulder 184 on the arm 186, it carries the arm 186 to 3), thereby swinging the arm 192 to the left about the shaft 194 and engaging the end of the arm 192 with the end of the rod 92. The rod is thereby thrust longitudinally against the tension of the spring 110 in a direction to disengage the clutch members 88 and 90,

the left (Fig.

and to engage the brake member 94 with 110 and 106, thereby forcing the brake members more firmly into engagement. The springs 110 and 106 cushion the action of the stopping devices 'so that the parts are brought to rest without shock or jar and without excessive strain on any of the parts.

' suflicient to insure that the shaft will be slowed down to the speed of the driving member of the slow speed clutch and will be driven thereby at slow speed before the stoping devices are engaged.

In order to prevent breakage of the parts, in case the stop mechanism fails to act properly and the shaft is not slowed down to the speed of the driving member of the slow speed clutch when t e lug 188 engages the shoulder 184-, a projection QO-i is formed on the arm 186 and is provided with an inclined face 206. If the, shaft and the parts rotating therewith are moving at a higher speed than the speed of rotation of the slow speed driving clutch member when the lug 188 engages, the shoulder 18 1, the arm 186 will be carried over farther to the left than under normal conditions and the in-.

clined face 206 of the projection 204 will be brought into engagement with an inclined face 208* on the frame, and the arm 186 will be thrown down so as to disengage the shoulder 184.- from the lug 188 and allow the shaft to, make another rotation before it comes to rest.

Having explained the nature and object of the invention, and having specifically described mechanism embodying the invention in its preferred form, what is claimed is 1. A driving stopping mechanism, having in combination, a shaft, high speed driving mechanism therefor, a slow speed driving member for the shaft, means for disconnecting the shaft from the high speed driving mechanism and connecting it with the slow speed driving member, means for actuating the slow speed member, and means for disconnecting the slow speed member from its actuating mechanism and arresting its rotation while the shaft remains in connection with the slow speed member to stop the rotation of the shaft.

2. A driving and stopping mechanism, having in combination, a shaft, high speed driving mechanism therefor, a slow speed driving clutch member for the shaft, a slow speed driven clutch member, means for engaging the slow speed clutch members upon disconnecting the shaft from its high speed driving mechanism, means for actuating the slow speed driving clutch member, and

means for disconnecting the slow speed driva slow speed driving friction clutch member and a cooperating clutch member for slowing down the shaft and driving it forward at slowspeed to stopping position, means for engagin the members of the slow speed clutch when the shaft is disconnected from the high speed'driving mechanism, means for actuating the slow speed driving clutch member, and means for disconnecting the slow speed driving clutch memberfrom its actuating mechanism and stopping its rotation at the end of a predetermined interval after the engagement of the clutch members and while I they remain in engagement to stop the rotation of the shaft.

4. A driving and stopping mechanism, having, in combination, a shaft, high speed driving mechanism therefor, a slow speed driving friction clutch "member and a cooperating clutch member for slowing down the shaft and driving it forward at slow speed to stopping position, means for actuating the slow speed driving clutch member, means for engaging the slow speed clutch members at a predetermined point in the rotation of the shaft upon disconnecting the shaft from the high speed driving mechanism, and means for disconnecting the slow speed driving clutch member from its actue atingmechanism and arresting its rotation at the end of a predetermined interval after the engagement of the members of the clutch and while they remain in engagement to arrest the rotation of the shaft at a predeter mined point.

5. A driving and stopping mechanism,

having in combination, a shaft, high and low speed driving mechanism, therefor,

means for disconnecting the shaft from the high speed driving mechanism and connects ing it with the low speed driving mechanism, and means for finally bringing the shaft to rest while it is driven at slow speed by the low speed mechanism comprising a stop carried by one of the driven parts, a finger arranged to be projected into the path of the stop, and mechanism actuated by said finger for disconnecting the shaft from the lowspeed mechanism and arrestingits rota tion.

6. A driving and stopping mechanism, having in combination, a shaft, high speed driving mechanism therefor, a slowspeed driving clutch member and a cooperating clutch member mounted to rotate with the shaft for slowing down the speed of the shaft and driving it at slow speed to stopping position, means for engaging the slow speed clutch members when the shaft is d1sconnected from the high speed driving mechanism, means for actuating the slow speed driving clutch member comprising a secondary clutch, a brake for arresting the rotation of the shaft, and means for disconnecting the secondary clutch and engaging the brake to bring the shaft to rest.

7. A driving and stopping mechanism, having, in combination, a shaftya high speed driving mechanism therefor, a slow speed driving member, means for connecting the shaft with the slow speed member upon disconnecting it from the high speed driving mechanism, means for actuating the slow speed driving member comprising a clutch, a brake for arresting the rotation of the shaft, and means for disconnecting the clutch and engaging the brake to bring the shaft to rest.

8. A driving and stopping mechanism, having, in combination, a main shaft, high speed driving mechanism therefor, a slow speed driving clutch member for the shaft and a coeperating clutch member fast on the shaft for slowing down the shaft and driving it at slow speed to stopping position, means for actuating the slow speed driving clutch member comprising a worm gear carried thereby, a worm meshing with the worm gear, a worm shaft, a secondary clutch for rotating the worm shaft, a brake for the worm shaft, and means for disconnecting the secondary clutch and engaging the brake while the slow speed clutch members remain in engagement to arrest the rotation of the main shaft.

9. A driving and stopping mechanism,

having, in combination, a main shaft, high speed driving mechanism therefor, a slow speed driving clutch member and a coep'eratin'g clutch member fast on the shaft for slowing down the shaft and driving it to stopping position, means for actuating the slow speed driving clutch member comprising a worm gear carried thereby, a worm meshing with the wormgear, a worm shaft,

'a secondary clutch for rotating the worm shaft, a brake for the worm shaft, and means for disconnecting the secondary clutch and engaging the brake while the slow speed clutch members remain in engagement to arrest the rotation of the main shaft comprising a stop carried by one of the parts which are driven by the worm, a stop finger arranged to be projected into the path of the stop, and mechanism operated by the finger for disconnecting the secondary clutch and engaging the brake.

v10. A driving and stopping mechanism,

having, in combination, a main shaft, adriving clutch member therefor, a cooperating clutch member mounted on the shaft to ro-- tate therewith, means for actuating the driving clutch member comprising a worm gear carried thereby, a worm meshing with the worm gear, a worm shaft, a secondary clutch for rotating the worm shaft, a brake for the worm shaft, and means for arresting the rotation of the main shaft comprising a stop carried by one of the parts driven by the worm, a stop'finger arranged to be projected into the path of the stop, and mechanism actuated by the finger for disconnecting the secondary clutch and engaging the brake while the first clutch members remain inengagement.

11. A driving and stopping mechanism, having, in combination, a main shaft, a driving clutch comprising a driving clutch member and a cooperating driven clutch member mounted on the shaft to rotate therewith, means for actuating the driving clutch member comprising a worm meshing therewith, a worm shaft, a secondary clutch for rotating the worm shaft, a brakefor the worm shaft, and means for disconnecting the secondary clutch and engaging the brake while the first clutch members remain in engagement to arrest the rotation of the main shaft.

12. A driving and stopping mechanism,

having, in combination, a shaft, high and low speed driving mechanism therefor, comprising a slOW speed driving clutch member and a driven clutch member mounted to rotate with the shaft, means for rotating thu driving clutch member comprising a secondary clutch, a brake for the driven member of the secondary clutch, and means for disengaging the secondary clutch and engaging the brake while the members of the slow speed clutch remain in engagement to arrest the rotation of the shaft.

13. A driving and stopping mechanism, having, in combination, a shaft, high and low speed driving mechanism therefor, means for disconnecting the shaft from the high speed driving mechanism and connecting it with the low speed driving mechanism, means for disconnecting the shaft from the low speed mechanism and arresting its rotation comprising a stop carried by one of the parts driven by the slow speed mechanism, a finger arranged to be projected into the path of the stop, mechanism operated by the finger for disconnecting the shaft from the low speed mechanism and arresting its rotation, and means for projecting the finger into the path of the stop upon disconnecting the shaft from the high and connecting it with the low speed driving mechanism.

14:. A driving and stopping mechanism,

having, in combination, a shaft, high speed driving mechanism therefor, a slow speed the clutch and engaging the brake while the shaft remains in connection with the slow speed member to arrest the rotation ,of the shaft comprising a stop carried by one of the parts driven by the clutch, a finger arranged to be projected into the path of the stop, and mechanism actuated by the finger for disengaging the clutch and engaging the brake.

15. A driving and stopping mechanism, having in combination, a shaft, high speed driving mechanism therefor, a lowspeed driving clutch member and a driven clutch member mounted to rotate with the shaft, means for rotating the driving clutch membercomprising a secondary clutch, a brake for arresting the rotation of the parts driven by the secondary clutch, means for disengaging the secondary clutch and engaging the brake while the slow speed clutch members remain in engagement to arrest the rotation of the shaft comprising a stop carried by one of the parts driven by the secondary clutch, a finger arranged to be projected into the path of the stop, and mechanism operated by said finger for disengaging the secondary clutch and engaging the brake.

16 A driving and stoppin mechanism, having,in combination, a shaft, high speed driving mechanism therefor, a slow speed driving clutch member and a driven clutch member mounted to rotate with the shaft,

means for rotating the driving clutch member comprising a secondary clutch, a brake for arrestingthe rotation of the parts driven by the secondary clutch, means for disengaging the secondary clutch and engaging the brake while the slow speed clutch members remain in engagement to arrest the rotation of the shaft comprising a stop carried by one of the parts driven by the secondary clutch, a finger arranged to; be projected into the path of the stop, mechanism operated by said finger for disengaging the secondary clutch and engaging the brake, and means to project the finger into the path of the stop upon disconnecting the shaft from the high speed driving mechanism and engaging the members of the slow speed clutch.

17. A driving and stopping mechanism, having, iii-combination, a shaft, high speed driving mechanism therefor, a slow speed driving member, means for actuating the driving member comprising a clutch, a brake for arresting the rotation of the parts driven by the clutch, and means operated through the clutch for disconnecting the clutch and engaging the brake while the shaft remains in connection with the slow speed driving member to arrest the rotation of the shaft.

18. A driving and stopping mechanism, having, in combination, a shaft, high speed driving mechanism therefor, a slow speed driving clutch comprising a driving clutch member and a driven clutch member, means for actuating the driving clutch member. including a secondary clutch, a brake for arresting the rotation of the parts driven by the secondary clutch, and means operated through the secondary clutch for discon member, means for engaging the clutch members comprising a cam carried by one of the clutch members, a lever normally oscillated idly by said cam, a locking pin for locking said lever from oscillation to cause the engagement of the clutch members, and means for timing the engagement of the locking pin with the lever. v

20. A drivin and stopping mechanism, having, in com ination, a shaft, a driving clutch member and a driven clutch member, means for engaging the clutch members comprising a cam carried by one of the clutch members, a lever normally oscillated idly by the cam-and having a recess, a locking pin having a projection thereon for engagement with the recess in the lever to lock the lever from free oscillation and thereby cause the engagement of the clutch members, and means for preventing the engagement of the locking pin with the recess until the lever registers with the pin.

21. A driving and stopping mechanism,

having, in combination, a shaft, a driving member for the shaft, means for connecting the driving member with and for disconnecting it from the shaft, means for actuating the driving member, and mechanism for disconnecting the driving member from its actuating mechanism and arresting its rotation while it remains in connection with the shaft to stop the rotation of the shaft. 7

22. A driving and stoppin mechanism, having, in combination, a sha t, main driving mechanism for the shaft, stopping mechanism for the shaft arranged to be thrown into operation as the main driving .mechanism is disconnected from the shaft,

and means arranged for adjustment to prevent the throwing of the stopping mecha nism into operation as the main driving mechanism is disconnected from the shaft.

23. A driving and stopping mechanism, having, in combination, a shaft, main driving mechanism for the shaft, stopping mechanism for the shaft arranged to be thrown into operation upon the disconnection of the driving mechanism from the shaft, a device operating when in one position to prevent the throwing of the stopping mechanism into operation, machine operated knock-0E mechanism for throwing said device out of such position to allow the stopping mechanism to be thrown into operation, and provision for adjustment to render the knock-0E mechanism inoperative so that the stopping mechanism is not thrown into operation upon the disconnection of the main driving mechanism from the shaft.

24. A driving and stopping mechanism, having, in combination, a shaft, driving mechanism for the shaft, mechanism for stopping the rotation of the shaft, a stop carried by one of the driven parts, a-finger arranged to be projected into the path of the stop, mechanism operated by the finger for throwing the stopping mechanism into operation, and means for throwing the finger out of engagement with the stop when the stop is moving at a relatively high speed at the time of the engagement of the finger therewith.

25. A driving and stopping mechanism, having, in combination, a shaft, a driving clutch member therefor, a driven clutch member, means for engaging the clutch members comprising a cam carried by one of the clutch members, a lever normally oscillated idly by the cam, a locking pin for looking the lever from oscillation to cause the engagement of the clutch members, a latch for preventing the engagement of the look ing pin with the lever arranged to be released by the lever, and provision for adjustment to render the lever inoperative to release the latch.

26. A driving and stopping mechanism having, in combination, a shaft, high and low speed driving mechanism for the shaft, means for throwmg the low speed mechanism into and out of operation comprising a normally inoperative cam, means for rendering the cam operative upon the disconnection of the shaft from the high speed driving mechanism, and means arranged for adjustment to prevent the cam from being rendered operative upon the disconnection of the shaft from the high speed driving mechanism.

27. A driving and stopping mechanism having, in combination, a shaft, high and low speed driving mechanism for the shaft, means for throwing the low speed mecha nism into and out of operation comprisin a normally inoperative cam, a lever norma lly oscillated idly by the cam, a lock bolt carrier, a lock bolt movably mounted in the carrier for locking the lever to the carrier to render the cam operative, a latch for preventing the engagement of the lock bolt with the lever, and a block adjustably mounted on the latch and arranged when in one position to be engaged by the lever to throw out the latch, and when in another position to lie out of the path of the lever.

WILLIAM C. MEYER.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents, Washington, D. G.

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