US1139863A - Feeding mechanism for sewing-machines. - Google Patents

Description

L HAYES, Jn.

FEEDLNG MECHANISM FOR'SEWING MACHINES.

AFPLICATQH FILED FEB. 6| 1.909. lglg@ Patanted May 18, 19M.

3 SHEETS-SHEET l.

i. HAYES, IR... FEEDING MECHANISMEOR SEWING MACHINES.

lAPNIC/mora min ria. s, 1909.

Patented May 18, '1915.

3 SHEETS-SHET 2.

'nwnl'voz f MMS I. HAYES, In. FEEDING MECHANISM FOR SEWING MACHINES.

APPLICATION FILED FEB. G, 1909.

Patente y18, 1915.

3 SHEETS-SHEET 3.

JOHN HAYES, JR., 0F AMSTERDAM, NEW YORK, ASSIGNGE. T0 UNION SPECIAL MACHINE COMPANY, 0F CHICAGO, ILLINOIS, A. GQTION 1OF ILLINOIS.

FEEDING MECHAJSTISM FOR SEWINMACHINES..

Specification of Letters retient.

Yatented May 18, 1915.

application med february e, was. semina tiene.

'To all whom it may concern.'

Be it known that I, JOHN Herne Jr., a citizen of the United States, residing at Amsterdam, in the county of Montgomery, State of New York, have invented certain new and useful Improvements in Feeding Mechanism for Sewing-Machines, of which the following is a description, reference be ing had to the accompanying drawing and to the letters and figures of reference marked thereon.

The invention relates to new and useful improvements in sewing machines, and more especially to the feeding mechanism of a sewing machine.

The invention as herein shown 1s especially adapted to machines of the character which operate to full or gather a piece of fabric prior to stitching the same, or full or gather one piece of fabric relative to another, and secure the same together. When placing a binding strip or the like upon a knitted fabric, and more especially when binding across the wales ofthe knitted fabric, the knitted fabric is very apt to become stretched or distorted Ain the stitching operation. By my improved mechanism, the knitted fabric may be fed slightly faster than the binding strip or non-elastic fabric, thus overcoming the tendency of the knitted fabric to stretch, so that the two pieces of fabric will be evenly and smoothly stitched together. It is sometimes desirable, when stitching one piece of fabric to another of the above character, to cause the fulling action of the feeding mechanism to cease, as for example, lwhen crossing stay strips or the like. The, invention, therefore, contemplates providing mechanism whereby 'the falling action of the feeding mechanism may be rendered ineffective whenever desired, without stopping the stitching mechanism.

The invention consists in the parts, arrangements and improvements hereinafter shown, described and pointed out in the appended claims.

In the drawings, which show by way of illustration, one embodiment of the invention, Figure 1 is an end view of a sewing machine with my improved feeding mechanism attached thereto, certain parts of the machine being in section, in order to show the lower feed. Fig. 2 is a similar view showing the controlling lever thrown to a position so as to cause the auxiliary feed to have a dierential movement imparted thereto. F1 3 is a top. plan view Vof the feeding in anism, also showing the work supportvand the binder for feeding a strip pf binding. Fig. 4 is a detail view showmg the cam for operating the auxiliary feed dog.

The sewing machine as herein shown, in cludes an overhanging arm 1, in which rec1procates the needle bar 2, carrying a needle 3. A presser. bar 4 is also mounted in the overhanging arm and carries 'a presserl foot'5. 'These parts are of the usual construction, and will not need further descrlption.

. The main feed dog 6, is adjustably secured to the feed bar 7, which in turn is pivoted at 8 to the rocking frame 9, which is rocked back and forth from a crank arm on the forward end of the main shaft, in the usual manner. The main feed dog 6, receives its up and down movement from a cam 10, mounted on the main shaft 11. This main feeding mechanism is of the usual type, and the construction of the same will be readily understood from the vabove description.

Coperating with the main feed dog 6, is an auxiiiary feed dog 12. Said auxiliary feed dog 12, is carried by a pivot bolt 13, secured to the outer end of an arm or feed bar le, which extends along side of the presser bar and needle bar, to a oint in rear of the needle head, where it is elected laterally as at 15 (Fig. 3), and then forwardly as at 16, and thence downwardly as at 17, where it is secured to the auxiliary feed supporting bar 18. Said auxiliary feed supporting bar is pivoted to the rocking frame 9, at substantially the point 8, so that as the rocking frame moves back and forth, the auxiliary feed bar likewise, moves back and forth. Said auxiliary feed bar is moved up and down by means of a cam 19, lwhich is mounted on the main shaft 11, and oppositely disposed to the cam 10, so that as the main shaft rotates, the main feed will be lowered away from the fabric at the same time the auxiliary feed is raised upward above thc fabric, and then when the main feed is brought into contact with the movement, the auxiliary feed dog will likewise be brought into engagement with the fabric to give thereto its feeding movement.

The-auxiliary feed bar 18 is held on its operating cam by means of a spring arm 20a, which is secured to the auxiliary feed bar and extends underneath said cam where it is provided with a bearing surface which engages said cam. The auxiliary feed dog 12 is provided with a rearwardly extending shank or arm 2 0. Said arm 2O lies in substantially the same vertical plane as the arm or feed bar 14 and a spring 21 normally holds the arm 20 in contact with the arm 14.

The auxiliary feed dog 12, is located as yshown in'Figs. land 3, in front of and slightly at one side of the stitching point. Said auxiliary feed dog as herein shown, coperates with a smooth portion of the throat plate 22, and operates upon the material, alsoin advance of the main feed.

In the operation of the parts as above dev scribed, the auxiliary feed dog moves in unison with. the main feed dog, and assists in feeding the material to the stitching point. At the rear of the machine, is a pair of brackets 23, which are secured to the work `support by suitable screws 24. A shaft 25 is mounted in said brackets 23, 23, andan arm or lever 26 engaging the shaft 25 between the brackets 23, is secured thereto by a set screw 27. .Said'shaft 25 is provided with an eccentrically set extension 28, on which is freely mounted a bearing block 29. Said bearing block is held on Said extension against lateral movement by the stop collars 30, 30. Adjustably mounted on the bearing block 29 is an arm 3l` which is secured to said bearing block by the slotand screw connection 32. The arm 31 at its forward end normally rests on the arm or bar 14 carrying the auxiliary feed dog. As the auxiliary feed dog moves back and forth and up and down, in its feeding movements,

the arm31, together with its bearing block, swingsabout the extension of the shaft 25. The spring 21 which engages the arm 20 at one end, engages the arm 3l at its other `end, and not only holds the arm 20 in contact with the arm 14, but also holds the arm 31 against the arm 14. When the lever 26 is in the position shown in Fig. 1, the forward end of the arm 31 is so disposed that in the vibration of the auxiliary feed dog back and forth, thearm 20 does not contact Y with the arm 31. If however, the lever 26 .mg each of its feeding movements.

be swung to the position shown in Fig. 2,

the extension 26 1s then moved toward the front of the machine b the oscillation of the shaft 25, the arm 31 1s carried forward, so that the arm 20 supporting the auxiliary feed dogwill contact with the arm 31, dlulr- 1e arm 31 is beveled at its forward end, so as which engages a slmilar cam shoulder 34 on the arm 20. When the arm 2O therefore,

contacts with the arm 31, the cam shoulderl operates to swing the arm 20 about the pivot bolt 13, and thus impart to the auxiliary feed dog, an additional movement. The additional or differential movement of the auX- iliary feed dog will ofcourse, depend upon the position of the arm 31, and it will be readily seen that by the swinging. of the lever 26 up or down more or lessthe auxiliary feed dog may be caused to move in unison with the mam feed dog, or a differential movement may be given thereto of any degree within certain limits. lBy the term unison vI mean that the auxiliary feed dog is moved back and forth in the same timing as the main feed dog, having the same length of feed stroke so that the effective feeding action on both the upper and lower faces of the fabric will be the same. f A

In the present embodiment of my invention, I have shown my improved differentially moving feed dog, asused in connection with a machine for stitching a bindin on to another piece of fabric which is pre erably knittedv elastic fabric. The binding is led through the binder 35, from which it passes to the stitch forming mechanism. The main feed dog is preferably so located as to engage the binding strip, and the knittedA fabric, while the auxiliary feed dog is so'disposed as to engage only the knitted fabric 1n advance of the stitching point.

When stitching a knitted fabric to a strip of binding, the knitted fabric is apt to be-l come stretched-or distorted in the stitching operation. By my differential moving auxiliary feed dog, the knitted fabric advances a little faster than the binding` strip, so that this stretching action is overcome and the.

knitted fabric smoothl and evenly attached to the binding strip. en h ever, a stay strip or other non-elastic portici of the body fabric reaches the stitching point, it is detrolled so as to again have a differential movement imparted thereto.

Having thus particularly described my invention, what I claim as new and desire t0 secure by Letters Patent is z+ 1. The combination of a stitching mechatiene nisni, a worlr aippert, and afeed'meehamechaniemfineluding al main feed mi a nism including a feed dog, a bar to which Vfeed bar on which'said feed dog is carried, said feed do 1s pivoted, means for moving me for moving said feed bar back and said bar bac and forth and up and down, forth and up and down, for giving to said 5 to impart to said f dog its feeding meveffeed do its feeding movements, an auxilvo Y l ments, means for swmgin' 'g said feed do .si fee d ,an auxilia feed bar vte which about its pivot, whereby a horizontalY feedg; si'd auxiliargy feed dog ilsy ivoted, means for ing movement in addition to the movement. Vmoving said auxiliary fee bar up and down derived from the feed bar is imp'a to the and back and forth to impart feeding movefeed dog, and means vwhereby the oscillatments to the auxiliar feed dog, andmeans it ing movement of the feed dog about its underfthe control oft e o erator, for swingpivot maybe varied witho t mopping the saidauxiliary feed og abouty its pivot stitching mechanism. in the direction of the line of feed, whereby 2. The combination of a vwork support, a dierential feedin movementis imparted l stitch formin 'mechanism, and feeding tolthe aumfliary fee dog. to mechanism inc uding a main feeding mem- 7. The combination of a work support, bei', an auxiliaryv feeding member, means stitchv forming mechanism and a feeding for moving said auxiliary member in unison mechanism including a main feed dog, a with the feeding mer, d nor- `feed bar therefor means formoving said 2e mally inactive meansl independent of thel` Vfeed barv back and forth and up anddown, t5

means for moving the auxiliary member for imparting a feeding movement to said back and forthadapted to be brought into dog, an auxiliary feed dog, an auxiloperati'on at the will of the operator, fon liary feed bar tolwhich 4said auxiliary feed giving to said a' :ef feeding member, av ,dog is.-pivoted,.lmeans for moving said feed' -1 different rate of movement relativeto the bar backf and forth and up and down, for 90 main feeding member. 1 imparting a-feeding-inovement to said aux- 3. The combination of a work support, iliary vfeed dog, an abutment coperating v and Ia feeding mechanism includinga main with said feed dog for imparting a differfeed dog, an auxiliary feed dog, ,meansL for' 'ential feeding movement to said. auxiliary moving said auxiliary feed dog` faster than feed dog;` l l f the main feed dog, including an abutment v 8.- Thefcembination of a work support,

and means under the contro of the voperastitch :forming mechanism and aY feeding tor for varying the position of said abutmechanism Aincluding a mainfeed dog, a

ment, wherebythe d of the auxiliary vfeed ,barA therefor, :means for'moving said i 85 feed dog relative to themain feed dog, may feedbar back and forth and up and down 100 be varied. i i forimparting afeedin `-movement to said 4. The combination of a work support and feed dog, an auxiliary eed dog, a feed bar a feeding mechanism, including a main feed to which said auxiliary feed dog is pivoted,

dog, an auxiliary feed dog, means for givmeans. for moving Asaid feed bar back. and

40 ing said auxiliary. feed dog, a feeding move-AV fertig-'and up and down, for imparting a 105 1 ment in unison with the main/feed dog, an feeding movement to said auxiliary feed abutment and means underv the control of l. dog, an abutment peratingwithsaid piv the operator for` causing said abutment tooted feed. dog', for-:imparting a differential Y impart a diderent rateof movement to the feeding .movement-to said auxiliary feed a5 auxiliary feed dog relative to the main feed dog, and: means under the control of the op'- 110 dog. l v Y erator for varying the osition of said abut- '5. The combination of a work support, ment, whereby -said derential movement stitch forming mechanism and 'a vfeeding may be varied. l mechanism, including a main feed dog, an 9. A feeding mechanism including in l auxiliary feed 4dog engaging the material combination a feeddog, a feed bar to which 115 in advance of the stitching mechanism, a said feed dog. is pivoted, means for moving feed lbar to whichsaid auxiliary feed do is said feed bar back and forth-and up and ivoted, means for movin said feed ar down for imparting a feeding movement'to ack and forth and up and own for impartvsaid feed dog, said feed .dog having an arm ing feeding movements-to said auxiliary providedvvith a cam shoulder and an abut 120 L iary'feed dog, and means whereby thene- .to the feed dog.'

feed dog, means for oscillating said auxilment-:adapted to be brought into engage-- iary feed dog on its pivot in the direction ment with said cam shoulder, forswinging of the line of feed, whereby adiderential said feed dog on its-pivot, whereby an addifeeding movement is imparted to the auniltional feeding movement may be 'imparted i215 cillatingv movement of said auxiliary feed 10.'.dfeedingmechanism includingin com` dog, may be varied without stopping the bination a feed dog, a feed bar to which said l stitching mechamsm. d .dogis pivoted. means for moving saidv 6. The combination of a work support, feedba'r backend forth andup'and down,

stitch forming mechanism,` anda; feeding for imp 1 in ga feeding movement to said im@ feed dog, said feed dog'having an arm-provided with a cam shoulder, andeanabutment adapted to befbrought into engagement with said cam shoulder for swinging -sa1d :feed

dog on its pivot,nwhereby an additional lfeeding movement may be imparted to -the feed dog, and means under the control of fthe operator for varying the :position of Vthe abutment, wherebyfthe amount. of additional feeding movement is varied.

11. A feedingmechanismdncluding in combination, a feed bar, .a feed dog fpivoted thereto,-.and having a rearwardly extending arm overhanging said feed bar, a spring normally holding said arm in contact with said ban-and an abutment adapted-to engage said arm and swing saidv feed dogabout'its ivot.

12. A feeding mechanism including incombination, a feed bar, a `feed dog pivoted thereto, and having a'rearwardly'extending arm overhanging said feed bar, a sprlng normally holding said arm in-contact 'with said bar, and anabutment adapted to engage said arm and swing said :feed dog aboutzits pvot, and means underthe control ofthe operator for varying the .position of said abutment.

13. A feeding mechanism includingin combination, a feed bar, a feed dog pivoted to said feed bar, said .feed doghavinganarm overhanging said feed zbar, and normally resting thereon, a shaft, an leecentrieallylocated extension carried A,by .said shaft, aA

4bearing block carried by said extension, an armcarried by saidbearing block and located in the plane of movement of the arm of the auxiliary feed dog, and' means for oscillating said shaft whereby said. arm carried thereby may be moved -so asto contact withthe arm of the; auxiliary feed dog and swing 4said armaboutits pivot. f

14. A feedingmechanism including in combination a feed bar, a feed dog pivotedto said feed bar, -said .feedrdog having. an arm overhanging said 4feed bar :and normally resting thereon, a shaft, aneccentricallylocated extension carried by said shaft, a bearing block carried-by said extension, an arm carried by said bearing block-and rlocated in the plane of movement. of the arm of the auxiliary feed dog, and means .for oscillating said shaft-whereby said: arm carried thereby may be moved so as tocontact with the arm of the. auxiliaryfeeddog, .and swing said arm about-its pivot, and means for adjusting the arm carried by said shaft on itssupporting block.

15. `A feeding mechanism including in combination, a. feed bar, a feed dog-pivoted to said feed bar, saidfeed dog having an arm overhanging `said feed bar, and normally resting thereon, .a shaft, an ecentricallylocated extension carriedby saidshaftya bearing block A.carried by said extension, an

arcanes arm-carried by said bearing block and located :in the plane of movement of the arm of fthe .auxiliary rfeed dog, means for oscillating-said shaft whereby said arm carried .thereby may'be moved so as to contact with the-arm'of the auxiliary feed dog and'swing saidarm about its pivot, a spring engagingthe arm of the auxiliary feed dog for holding .the .same lagainst the feedv bar, said :spring alsoholding the arm'carried by said :shaft in-contact-with said feed bar.

16. Affeeding mechanism'including in com- ;bination, a feed bar, means for'moving said -feedfban an auxiliary feed dog pivoted to .said feed bar, anarm carried bysaid auxiliary :feed Adog, .and overhanging said feed bar,,afcamshoulderformed on saidarm, a shaft,;an eccentrically-located extension car- :ried -by said shaft, an arm pivotally sup- '.ported on said extension, said arm having a camshouldenat'its forward end, which may .maybebrought intocontact with the cam shoulder on-the arm of the feed dog, for oscillating said feed dog about its pivot, andmeansunder the control of the operator forfoscillating said shaft.

18. Thecombination of main feed dogen'gaging the material from beneathrtheworksupport, an auxiliary feed dog-engagingtheupper surface of the materialen said l.work support, a feed bar to Iwhich .said auxiliary feed dog is pivoted,

said auxiliary feed dog having a rearwardly extending Aarm resting on said -feed bar, Abrackets mounted on said work support, a shaft carried by said brackets, an eccentrically-located extension carried bysaid shaft, -a bearing block pivoted to -said extension, .an .arm carried by said bearing block and located in the plane of movement of said feed bar, coperatin cam shoulders formed on said arm carrie by said extension and the -arm of said feed dog, a spring connecting the arm of said feed dog to the arm carried byl lsaid extension and a lever connected -to saidshaft, and adapted to be moved by 'the operator. y

19. The combination of a stitch-forming mechanism, a work sup ort and a feeding mechanism including a eed dog, a 4feed bar vfor supporting said feed dog, means for moving said feed bar back and 4forth and a work'support, av

up and down to impart to said feed dog its nism, a pivoted feed bar,

aisance a feed dog carried feeding movements, and additional means by said feed bar, means "for giving said feed under the control of the operator without bar and feed dog a bodily movement in a stopping the stitch forming mechanism for prescribed path and means moving said feed moving said feed dog relative to the feed bar bar about its pivot for accelerating the during a part of its travel, whereby said feed movement of said feed dog in a predeterdog is given a dierential movement relative mined portion of said path. to the feed bar. 22. A feeding mechanism including in 20. In a sewing machine, a work support combination a feed bar, a feed d'o pivoted and a feeding mechanism comprising a feed to said feed bar, said feed dogxaving a dog operating below the work support, a fabric engaging portion extending substanfeed bar supporting and giving the reciptially at .right angles to the feed bar, and an. rocating feed movement to said feed dog, a arm substantially parallel -with said feed feed dog operating above said Work support, bar rigidly connected with 'said fabric ena feed bar supporting and giving the recipro\ gaging portion, and means for normally eating feed movement tosaid last named feed holding said arm in contact with said feed dog, means for moving the feed bars back and bar. Y forth in unison and means` under the control In testimon whereof I aiiix my signature, of the operator for accelerating the movein presence o two witnesses. ment of one of said feed dogs relative to JOHN HAYES, JR.

its supporting feed bar and on its work Witnesses: fcedin movement. HARVEY Boon, 21. a sewing machine a feeding mecha- J. F. KELLY.

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