US1205333A - Sewing-machine. - Google Patents

Description

A. H. DE VOE.

SEWING MACHINE.

APPLICATION FILED JAN. 14, 1913.

1 2M333 Patented Nov. 21, 1916.

3 SHEETS-SHEET l.

lNl/E/VTOR mmw A. H. DE VOE.

SEWING MACHINE.

APPLICATION FILED JAN. 14. 1913.

153 3 Patented Nov, 21, 1916.

3 SHEETS-SHEET 2- WITNESSES: l/Vl/E/VTOR A. H. DE VOE.

SEWING MACHINE.

APPLICATION FILED JAN-14,1913.

1 205 333, Patented Nov. 21, 1916.

I 3 SHEETS-SHEET 3.

pair" ear-s ea or.

ALBERT H. DE voE, E WESTFIELD, NEW JERSEY, ASSIGNOR TO THE sINGEE MANU- "FAGTURING COMPANY, A CORPORATION OF NEW JERSEY.

SEWING-MACHINE.

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Specification of Letters Patent. Patent ed N 21 1 916 Application filed January 14, 1913. Serial N 0. 741,929.

T 0 all whom it may concern:

' accompanying drawings.

This invention has for its object to provide a sewing-machine adapted for uniting and serging in a single operation the edges of fabrics, and particularly the overlapping margins of the soles and uppers of that class of Japanese footwear known as tabis.

It has for further objects to provide means for varying the spacing of th loops of binding thread for the raw edges of fabric without changing the length of the stitches, to so apply either a single binding thread or two crossed binding threads, and to provide means whereby a machine so fitted may be converted into a straight-away stitching nuichine capable of operation within the body portion of a fabric intermediate the margins.

The present improvementv is preferably embodied in a sewing machine having straight-away stitch-forming and feeding mechanisms of any usual or suitable type. Disposed upon the opposite side of the worksupport from the reciprocating needle are two rocking supports journaled to oscillateand slide upon fixed fulcrum-pins parallel with the needle. Each of these rocking sup- I -ports sustains a preferably. eye-pointed mechanism, including the needle and coopcrating loop-taker, whereby it may be driven at different speeds relatively to the mainshaft or wholly disengaged therefrom, a clutch being in the present instance employed to change or wholly disengage theconnection between the countershaft and main-shaft.

Figure 1 is a front side elevation of a sewing machine embodying the present improvement, with the frame in section, and Fig. 2 a bottom plan of the same. Fig. 3 is a rear side elevation of the machine and Fig. 4 a plan thereof with portions of the arm and bed-plate removed to expose certain parts beneath the same. Fig. 5 is a front end view of the lower portion of the machine with the bed-plate in section, Fig. 6 is a perspective view of the throat-plate and operative portion of the presser-foot,

Fig. 7 is a perspective'view of the thread-.

'difl'erent stages of the seam-forming operation. Fig. 16 is a perspective view showing diagrammatically one form of scam which the present machine is fitted to produce.

As represented in the drawings, the machine frame comprises the usual bed-plate 1 from which rises the bracket-arm standard 2 with tubular overhanging member 8 terminating in the hollow head 4 in which is journaled the reciprocating needle'bar 5 carrying the eye-pointed needle 6. The needle-bar has fixed thereon the collar 7 provided with the usual stud 8 embraced by the boss at one end of the pitman 9 whose other end is connected with a crank-pin upon the crank-arm 10 fixed upon the forward end of the main-shaft 11 which is formed therein the actuating crank 13 connected by the pitman 14 with the rocker 15 operatively connected with the loop-taker actuating rock-shaft 16 carrying at its forward end the driver 17 for the shuttle 18 journaled in the race 19 for "cooperation with the needle 6 and provided with the thread-case 20, as is common to a certain type of Singer machine.

The main-shaft carries the usual cam or eccentric 21.connected by means of the linkbar :22 with the feed-actuating rockshaft 23 provided with the usual yoke 24 to which is pivotally connected one end of the feed-bar 25' carrying the feed-dog 26. The forked opposite end of the feed-bar embraces the lateral stud 27 of a crank-arm 28 upon the feed-lift rock-shaft 29 connected by means of the pitman 30 with the feed-lift eccentric 31 upon the main-shaft.

Secured to the lower end of the presserbar 32 is the shank 33 of the presser-foot formed with the foot-plate 34 having the spaced ears 35 by means of which it is pivotally connected by the pin 36 to the lower end of the shank The foot-plate 34 cooperates in the usual manner with the feeddog 26 passing through the apertures 37 of the throat-plate 38 which has the usual needle-aperture 39 communicating with one of the feed-dog apertures 37 by the slot 40 and also with the laterally extending aperture 41 through which the binding-thread carrying implements pass in their cooperation with the needle alternately above and below thethroat-plate.

Secured upon the bottom of the bed-plate 1 by fastening screws 42 is the foot 43 of a hanger 44 formed with a lateral arm or member 45 having sockets in which are secured by set-screws 46 the lower ends of the laterally spaced stud- pins 47 and 48 disposed substantially parallel with the needle-bar 5 and having their reduced and threaded upper ends 47 and 48 tapped into the bearing plate 49 secured upon the bed plate 1. Journaled upon each of the stud- pins 47 and 48 are the rocking and sliding sleeves 50 and 51 provided at their upper ends with the lateral arms 52 and 53 each formed with a sub stantially radial socket in which is secured by means of the set-screws 54 the shank 55 of one of the thread-carriers 56 and 57 provided with a thread channel extending lengthwise thereof and terminating in the aperture 58.

Secured upon the lower portion of each of the sleeves 50 and 51fby means of aclamp-screw 59 is a split collar 60 formed with a laterally and downwardly extending arm 61 which is provided with an aperture parallel with the fulcrum- stud pins 47 and 48. Loosely journaled upon the lower portion of the stud-pin 48 is the boss 62 of a roclelever formed with the angularly disposed arms 63 and 64. The rock-lever arm 63 carries near the extremit of its upper face the roller-stud 65 and intermediate the same and the boss 62 the laterally disposed boss or projection 66 in which is rigidly secured the upwardly extending pin 67 slidingly fitted within the aperture of the arm 61 of the sleeve 51. The rock-lever arm 64 is pivotally connected by means of the screw-pin 68 with one end of a link 69 whose opposite end is similarly connected by means of the screw-pin 70 with an arm 71 of a rock-lever having a boss 72 journaled upon the lower portion of the stud-pin 47 and a second arm 73 provided in its outer end with the upwardly extending pin 74 slidingly fitted within the apertured arm 61 of the sleeve 50. By the means just described, the oscillatory movement of the rock-lever 63 64 imparts simultaneous endwise reciprocatory movements in substantially the same direction to the thread-carriers 56 and 57 while permitting them to perform independently their requisite rising and falling movements.

Journaled upon the rocking sleeves 50 and 51 intermediate their respective arms 52 and 53 and the split collars 60 are the loose sleeves 75 and 76 each provided with a lateral lug 75 and 76 having a transverse bearing aperture. These bearing apertures are entered by stud pins 77 and 78 projecting from the forward faces of the links 79 and 80 having at the opposite ends of their rearward faces similar stud-pins 81 and 82, the stud-pins 77 and 78 being confined within their respective bearing apertures by means of the screws 83 tapped into their extremities, as shown in Fig. 7. The stud'pins 81 and 82 enter respectively bearing apertures of the bosses 84 and 85 sustained by the oppositely extending crank-arms 86 of a collar 87 secured by means of the S8l'1' screw 88 upon the forward end of the rockshaft 89 which is journaled in the hanger 44 parallel with the loop-taker shaft 16.

The rock-shaft 89 has secured to its opposite end by means of the set-screw 90 the hub of a lateral crank-arm 91 which carries the ball'stud-pin 92 embraced by a strap at the lower end of the pitman-rod 93 provided at its opposite end with a similar strap embracing the ball stud-pin 94 carried by the lateral arm 95 of a bellcrank mounted upon the fulcrum screw-stud 96 and having theupwardly extending arm 97 terminating in the split socket 98. The socket 98 has a bushing 99 in which is mounted the pin 100 projecting from the shoe 10'0 affording a follower for the double switch-cam 101, of well knownconstruction, mounted upon the countershaft 102 journaled in the bearing bosses 103 of the bracket-arm 3.

At its forward extremity, the countershaft 10:2 carries an eccentric stud-screw 104 constituting a crank-pin which is embraced lower end the apertured boss 107 embracing the stud-screw '108 carried by the crank-arm 109 whose hub 110 is secured by means of the set-screw 111 upon the rearward end of the rock-shaft 112 journaled in suitable bearing members of the hanger 44. Fixed upon the forward end of the rock-shaft 112 is the cam-cylinder 113 formed with the cam-groove 114 entered by the roller-stud 65 of the rock-lever arm 63. By its connection with the rock-shaft 89 through the pitman 93, bellcrank 95 97 and switch-cam 101, the countershaft 102 imparts rocking movements from which are derived through the links 79 and 80 and sleeves 75 and 76 the rising and falling movements of the threadcarriers 56 and 57; while said countershaft imparts to the rock-shaft 112 through the crank-pin 104, pitman 106 and crank-arm 109 rocking movements from which are derived through the cam 113, rock-lever 63 64 and the other described connections the reciprocal endwise movements of the threadcarriers.

Secured uponthe top of the bracket-arm 3 between the guide-ribs 115 by means of the screw 116 are the shanks of the laterally extending nipper-arm 117 and the yielding guide-arm 118 beneath it. The guide-arm 118 is forked in its outer end to form a member 119 having at its inner edge an upturned lip 120 with suitable thread-guiding apertures and a second member 121 having upon opposite edges the upturned lips 122 and 123 of which the former has thread-guiding eyes in alinement with those of the lip 120 and the latter is formed with open slots 124 for a like purpose.

The upper extension 106' of the pitmanrod 106 is formed at its extremity with a pull-ofi" cam finger 125 which has a circular path of movement between the members 119 and 121 of the guide-arm 118, and in its upward and backward movement engages the binding threads 0 and d for drawing off the same from the source of supply,'as represented in Fig. 8. The arm 118 is preferably made of spring steel, and its member 121 is normally spaced slightly below the lower face of the arm 117 to permit the binding threads to normally pass f eely betweenthe same. lhe pitman-rod' extension 106 car-- ries adjacent the pull-off finger 125 the lat eral roller-stud 126 which, as the pitmanrod rises, presses the member 121 upwardly to nip the thread betwen the latter and the arm 117, whereby the pull-off finger 125 is caused to act wholly between the nipper thus formed and the binding thread supply.

The rearward portion of the countershaft 102 is made tubular to provide an axial recess or socket 127 which is intersected at the rearward extremity by atransverse slot 128.

Surrounding the slotted portion of the shaft 102 and confined betwen the rearward bearing 103 and a disk 129 secured thereto by screws 130 are the hubs 131 and 133 of two gear- wheels 132 and 134 loosely mounted for independentrotation thereon and each provided in one side with a groove or keyway 135 and 136, respectively. Disposed within the transverse slot 128, and'confined between the forward end of the same and the disk 129, is a coupling plate 137 having upon the opposite edges and at opposite ends the lateral extensions or feathers 138 and 139 and an intermediate recess or opening 140 extending from the forward end.

Embraced by the opposite walls of the recess or opening 140 is the rounded extremity 141 of a shift-lever 142 having intermediate its ends the perforated boss 143 journaled upon the transverse pin 144 passing through the countershaft 102 and having its opposite end portion reduced to a thin wire 145 sufficiently resilient to yield at certain times in shifting the lateral position of the coupling plate 137. The member 145 of the shiftlever passes loosely through a central aperture 146 and through the transverse slots 147 formed in the opposite faces of the endwise movable shift-pin 148 journaled in and transversely of the countershaft 102 and at right angles to the fulcrum-pin 144.

Secured upon the shaft 102 by means of set-screws 149 is a collar 150 apertured to receive the opposite ends of the pin 148 and formed with recesses 151 surrounding the same to provide access to the ends of the pin. The shift-pin 148 is provided centrally with three nicks or notches 152 adapted to be entered by the conical point of a yielding rdetent-pin 153 journaled within a socket in other direction to vary the action of the de tent-pin 153 upon the shift-pin 148.

F ixedupon the main-shaft 11 intermediate the hub of the pulley 12 and the bearing bushing 2' are two driving gears 156 and 157 meshing respectively with the loose gears 132 and 134 upon the countershaft 102, the gear 157 being of one-half the diameter of the gear 134 meshing therewith and the in termeshing gears 156 and 132 being of the same size, thereby providing for the turning of the countershaft at the same speed or onehalf the speed of the mainor driving shaft, depending upon which of the loose gears is coupled to the countershaft by the coupling plate 137.

The presser-foot and throat-plate are provided with the usual superposed stitch-sustaining or chaining fingers 34' and 38 (Fig. 6). Secured to the bed-plate by screws passing through apertures 158 is the foot 159 of a work-guide .whose shank portion 100 has at its forward extremity the upturned lip 161 to which is secured by screws 162 the edge-guiding plate 163 arranged in the direction of feed and terminating at its rearward end in a slightly tapered guiding and devices 165 and 166 upon the front side of the bracket-arm, and thence downwardly through the eyes of the respective threadcarrying implements 56 and 57.

When the shift-lever 142 of the coupling device is in central position, as represented in Figs. 9, 10 and 11, both the gears 132 and 134: are disconnected from driving relation with their supporting shaft 102, and rotate idly thereon at different speeds under the action of the driving gears 156 and'157. As so adjusted, the machine is in condition for plain stitching, the thread-carriers 56 and 57 being arranged substantially in the dotted-line position of Fig. 15 nearly flush with the top of the throat-plate, so that, the edge guide 160 163 being removed, the machine is adapted for performing straightaway stitching in any part of a fabric presented to the stitch-forming and feeding mechanisms without obstruction by either of the thread-carriers.

By pressure upon one end of the shift-pin 1 18, the latter is moved into an extreme position wherein it is detained by the detentpin 153 and the resilient portion 145 of the shift-lever 142 is bent laterally and presses the coupling plate 137 in the opposite direction until the keyway 135 of the gear 132 comes into register with the feather 138, when the latter snaps into it and couples the gear 132 to the countershaft whereby the latter is caused to rotate in unison with the main-shaft. In this relation of the parts, the thread-carriers 56 and 57 receive from the actuating crank-pin 104 through the connections including the pitman-rod 106 and the rock-shaft112 and cam 113 simultaneous endwise movements transversely to the direction of feed and across the edge-guide 163; while they derive from the switch-cam 101 reciprocal rising and falling movements of one-half the frequency of their endwise movements.

As the machine is thus adjusted, the marginal portion of two of more plies of fabric m to be united and serged is introduced between the pressure-foot and throat-plate and in contact with the edge-guide 163, and the machine set in motion. As the needle descends, it passes successively between the blade of the thread-carrier 56 and its thread 0 leading around the finger 164 through the throat-plate and between the thread carrier blade 57 and its respective binding thread (Z leading upwardly and around the finger 164, as represented in Fig. 14:. As soonas the binding threads have been caught by the needle, the carriers 56 and 57 begin to retreat laterally while the needle completes its descent and begins to rise to present its loop for seizure by the shuttle. During the rise of the needle, the thread-carriers complete their retreat to extreme retracted position, then perform their reciprocal vertical move ments and finally advance each to substantially the position formerly occupied by the other in presenting its loop for passage by the needle, the needle-thread loop having meanwhile been cast about the bobbin-case and the stitching threads thus interlocked drawn up into the work in the usual manner. In the succeeding stitch-forming operation the coiiperation of the needle with the thread-carriers and the shuttle is pre cisely the same, excepting that each of the thread-carriers has assumed the operative relation with the needle formerly occupied by the other, (Fig. 15).

It will be seen that the rocking sleeves 50 and 51 afford endwise movable supports for the thread-carrying implements, each sleeve moving lengthwise of its axis to position its lateral arm and thread-carrying implement prior to the advance and retraction of the latter.

By the operation above described, a com-' nately above and below the fabric. "Such a seam will obviously be suitable with the fabrics which are closely woven and of which the raw edges require to be bound only at intervals to prevent raveling.

By throwing the shift-pin into its oppo site extreme position, the gear 132 is uncoupled from and the gear 134 is coupled to the countershaft, whereby the latter is caused to be driven at one-half the speed of the mainshaft. By such adjustment of the machine,

a seam similar to that of Fig. 16 isproduced, excepting that the 'bindinglthread loops are caused to embrace only the alternate stitching-thread loops upon the opp'o site faces of the fabric; and by removing or i unthreading one of the binding thread-car'- -riers a single binding thread may be laid across the edge of the fabric with its loops caught by the stitching threads alternately and at every fourth stitch upon eachiface V of the fabric.

To insure against the-breaking or -bending 1 a of the thread-carriers in their advance or loop presenting. positions by the lifting of thepresser-foot, the presser-foot is prefere ably provided with a stop-collar 167 secured adjustably thereon by means of the setscrews 168, so that when the presser-bar rises under the action of the finger lifting lever 169 or the knee-actuated lever 170, it is arrested by engagement of'the stop-collar-l67' a reciprocating needle, a cooperating looptaker, a thread-carrying element having uniform, successive, reciprocatory movements and. cooperating with said needle independently of the loop-taker, and means under manually selective control for changing the frequency of action of'said implement relative to the needle movements.- I r 2. In a sewing machine, the combination with a reciprocating needle and a cooperating loop-taker, of a plurality o-f'thread-carrying implements cooperating with said needle at different points in its path of'reciprocation, and means for changing the fre- Y the work-support."

"9. In a se'wingmachme, the combination quency of action of said. implements relatively to that of the needle movements.

3. In a sewing machine, the combination with a reciprocating needle and a cooperating loop-taker, of a plurality of -reciprocally movable thread-carrying implements coopcrating alternately with said needle at the same point in itspath of movement',and meansfor changing the frequency of action needle movements;

of said implements relatively tothat of the n 4:. Ina sewing machine, the-combination erative connections between said actuating member and said implements whereby they are caused to cooperate with said needle at different points in its path of reciprocation,

f ctivega-l l and means for changing the speed of movement of said actuating member relatively to operative movements of the needle.

5.-In 'a' sewing machine, the combination with areciprocating needle and a cooperat- I ing-loop-taker, of a thread-carrying implement cooperatingwith said needle independently of the loop-takeryactuating members for -said thread carryingimplement, and man'ually 'shiftable controlling connections permanently mounted upon the machine for rendering said implement effective or inef- 6,7111. a sewing machine,- the-combination with a =reciproc'ating needle and "a cooperating loop-taker, of a plurality of' thre'adcarrying "implementsfcooperating with'said needle at "different points in' its path of reciprocation, and shiftable controlling connections permanently moun'ted upon the machine for rendering both of said implements effective or ineffective. i

' 7. Ina sewingmachine, the combination with a' reci-procatingneedle and a cooperating loop-taker, of a plurality of reciprocally 1 movable=- thread=carrying implements 00-. operating alternately with said needle at the same "point in its-"path of movement, and

'shi-ftabl'e controlling connections permaneiitly'niounted upon' the machine for reni dring both of said implements effective or ineffective. I

8. Ina sewing machlne, 1n comblnation, a

7 Work -support,- stitchforming mechanism including a main-shaft, a reciprocating 1 needle and actuating connections between saidmain-sha'ft and needle, and means conneote'd with said main-shaft independently of the'need-leactuating connections for imparting thereto operativemovements about the path of reciprocation of the needle timed to cause said implement to carry a thread to the needle during alternative"penetrations thereof and adapted'to impart to said implement successive operative movements about the. needle-path alternately above and below.

with a reciprocating'needle and a loop-taker cooperating therewith in each reciprocation thereof at the same point'in its pathfof .movement', Ofa plurality of thread-carrying implementspa'nd means for "imparting to said implements operative movements to cause each to" present thread-loops tothe uneedle in each alternate reciprocation of the latter and alternately at different points of its path of reciprocation; "j i "10. In a sewing machine,thecombination with'a work-support, areciprocating needle,

needle-actuating means disposed at one side operate with said needle alternately at opposite sides of the work-support, and means for rendering said implement-actuating means inoperative.

11. In a sewing machine, the combination with a work-support, a reciprocating needle, needle-actuating means disposed at one side -of the work-support, and a loop-taker cooperating with said needle at the opposite side of said work-support, of a plurality of thread-carrying implements, a support for each of said implements arranged at the same side of the work-support as said looptaker, actuating means for said implements whereby they are caused to cooperate with said needle respectively at opposite sides of the work-support and each to cooperate with the needle alternately at opposite sides of the work-support, and means for rendering said implement-actuating means inoperative.

12 In a sewing machine, the combination with a driving shaft, and a reciprocating needle and complemental loop-taking means deriving operative movements therefrom, of a thread-carrying implement adapted for presenting thread-loops for passage of the needle, actuating means for said implement, thangegearing adapted to afford a driving connection between said shaft and said actuating means whereby the latter may be operated at different speeds relatively to said shaft, and means a plied to said changegearing for contro ing the connection of said actuating means with the driving shaft Without change in the relative positions of the gearing elements and thereby determining the relative timing of the thread-car-- rierand needle-movements.

13. In a sewing machine, the combination with a driving shaft, and a reciprocating needle and complemental loop-taking means deriving operative movements therefrom, of a thread-carrying implement adapted for presenting thread-loops for passage of the needle, actuating means for said implement including a rotary shaft, a plurality of trains of intermeshing gears, each train having one gear fixed upon one of said shafts and another gear loosely mounted upon the other shaft, and means whereby said loosely mounted gears maybe coupled to and uncoupled from their supporting shaft.

14. In a sewing machine, the combination with a driving shaft, and a reciprocating needle and, 'con plemental loop-taking means deriving operative movements therefrom, of a thread-carrying implement adapted for presenting thread-loops for passage of the needle, actuating means for said implement including a. rotary shaft formed with a transverse slot, a plurality of gears of diffrom,

ferent size each mounted loosely upon said rotary shaft and provided with a keyway, drivinggears fixed upon the driving shaft and meshing with said loosely mounted gears, a key-plate fitted within the slot of said rotary shaft and movable successively into and out of engagement with the keyways of said loosely mounted gears, and means for shifting said key-plate to couple and uncouple said loosely mounted gears to and from the rotary shaft.

15. In a sewing machine, the combination with a driving shaft, and a reciprocating needle and complemental loop-taking means deriving operative movements thereof a thread-carrying implement adapted for present ng thread-loops for passage of the needle, actuating means for said implement including a rotary shaft formed with atransverse slot, a plurality of gears 35 of different size each mounted loosely upon said rotary shaft and provided with a' keyway; driving gears fixed upon the driving shaft and meshing with said loosely mounted gears, a radially movable key-plate fitted within the slot of said rotary shaft and provided upon opposite edges with projecting portions adapted to enter alternately said keyways of the loosely mounted gears, and

yieldingly acting means for shifting said key-plate to couple and 'uncouple said loosely mounted gears to and from the rotary shaft.

16. In a sewing machine, the combination with a main-shaft a reciprocating needle, 1'00 complemental loop-taking means and driving connections between said main-shaft and said needle and loop-taking means, of a threadcarrying implement adapted for presenting thread loops for passage to the needle, actuating connections between said main shaft and implement, a thread nipping plate, and a thread pull-off device including an arm having a thread engaging portion and a portion adapted to operatively engage said nipping plate and deriving its movements from an element of said actuating connections.

17, In-a sewing machine, the combination with a reciprocating needle and complemen tal loop-taking means, of a thread-carrying implement adapted for presenting threadloops for passage of the needle, actuating means. I

19. In a sewing machine, the combination with a reciprocating needle and complemental loop-taking means, of a thread-carrying implement adapted for presenting threadloops for passage of the needle, actuating means for said implement, a binding thread pull-0d device including an operating member deriving its movements from an element of said actuating means, and means including a plural-stepped coupling element whereby the action of said actuating means may be arrested or may be varied relatively to that of thevneedle and loop-taking means.

20. In a sewing machine, the combination with a reciprocating needle and a cooperating loop-taker, of a thread-carrying implement, a rocking support therefor mounted for 'movement upon an axis substantially parallel with the needle-path, and means for imparting to said support rocking movements upon and bodily reciprocating movements lengthwise of said axis.

521. In a sewing machine, the combination with a reciprocating needle and complemental loop-taking means, of a thread-carrying implement, a rocking support therefor mounted for movement upon an axis substantially parallel with the needle-path, means connected with said support for imparting thereto rocking movements, andmeans connected to said support independently of its rocking means and adapted to impart to it endwise movements upon its axis of less frequency than said rocking movements.

22. In a sewing machine, the combination with areciprocating needle and complemental loop-taking means, of a thread-carrying implement adapted for coiiperation with said needle, a rocking support therefor mounted for movement upon an axis substantially parallel with the needle-path, two rock-shafts, means for operating them with different frequency, a connection between one of said rock-shafts and said support for imparting rocking movements to the latter, and a connection between the other of said rock-shafts and said support for imparting to it its endwise movements lengthwise of 7 its axis.

23. In a sewin machine the combination with a reciprocating needle and complemental loop-taking means, of a thread-carrying implement 7 adapted for cooperation with said needle, a rocking support therefor mounted for movement upon an axis substantially parallel with the needle-path, two rock-shafts, means for operating them with diflerent frequency, an operative connection between one of said rock-shafts and said support and including a sliding and pivotal connection therewith whereby said support is given its rocking movements, a crank-arm upon the other of said rock-shafts, and a link connection between said crank-arm and said support whereby movements are communicated to the latter lengthwise of its axls.

In a sewing machine, the combination with a reciprocating needle and complemental loop-taking means, of a plurality of thread-carrying implements adapted for independent cooperation with said needle, rocking supports for said. implements mounted for movement upon axes substantially parallel with the needle-path, two rock-shafts, means for operating them with different frequency, a cam upon one of said rock shafts, a plurality of connected rocklevers each having a pivotal and sliding connection with one of said supports, an operative connection between one of said rocklevers and said cam, crank-arms fixed upon the other of said rock-shafts, and link connections between each of said crank-arms and one of said supports for imparting reciprocal endwise' movements thereto upon their respective axes.

25. In a sewing machine, the combination with a main-shaft a reciprocating needle, and driving connections between said mainshaft and needle; of a thread-carrying im plement adapted for presenting thread loops for passage of the needle, actuating connections between said main-shaft and implement, a thread nipping plate, and a thread pull-oil arm deriving its movements from an element of said actuating connections and adapted first to ope'ratively engage said nipping plate and secondly to pull oil thread.

In testimony whereof, I have signed my name to this specification, in the presence of two subscribing witnesses.

ALBERT H. DE VUE Witnesses:

HENRY J. MIL- sm, HENRY A. KORNEMANN, Jr.

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