US1494319A - chauian - Google Patents

Description

J. E. CHALMAN MULTIPLE NEEDLE SEWING MACHINE F1 led June 18 1919 7 Sheets-Sheet 1 May 13, 1924.

May 13 1924- 1,494.31 9 J. E. CHALMAN MULTIPLE NEEDLE SEWING MACHINE Filed June 18, 1919 7 Sheets-Sheet 2 I H! HM,

In lu mmmw May 13, 1924. 1,494,319

J. E. CHALMAN MULTIPLE NEEDLE SEWING MACHINE! Filed June 18, 1919 7 Sheets-Sheet 5 May 13. 1924.

1,494,319 J. E. CHALMAN MULTLLE NEEDLE SEWING MACHINE Filed June 18, 1919 7 Sheets-SM 4 lllllllllhiuT-lm H amen b0:

May 13. 1924. 1.494.319

J. E. CHALMAN MULTIPLE NEEDLE SEWING MACHINE Filed June 18. i919 7 Sheets-Sheet 5 6 Emma May 13 1924. 1,494,319

J. E. CHALMAN MULTIPLE NEEDLE SEWING MACHINE Filed June 18. 1919 7 Sheets-Sheet 6 May 13, 1924. 1,494,319

J. E. CHALMAN MULTIPLE NEEDLE SEWING MACHINE med June 18, 1919 7 sheets-sheet Patented May "13, 15924.

' UNITED? STATES F-AfTEFNT ioFFicE, F

JQEN' r. CHALMAN, or omcaoo, rumors, Assrononro omon'srnoun mica r oonramr, or cnroaoe, flamers, A ooaroiaa rfrorr or rumors.

. g nominee-NEEDLE sew 1nd miionnm.

Application flledJune 1B, 1919. Seriai 1T6. 305,019.

feeding mechanism transversely of the ma- To all it mali lomicem:

Be it known that I, JOHN E. CHALMAN, chine; A a citizen of theUnited States, residing at Fig. 4 is a planview of the work so port Chicago,in the county of Cook, State of with the cover plate for the forward end Ii/Illinois, have iiwented certain new and useof the throat late broken away;

gf'ul Improvements in MultipleNeedle Sew-- Fig.',5 is a etail view showin -a portion 7 -ing- Maehines, ofrwhich the "followin is a of the feeding mechanism iii siifia elevation description-1, reference being had to the acand with the augiliary feed dogs moyedtocompanying drawing and tothe figures, of ward the front'iiaf the machine to their'jex-m 10 reference marked thereon. I Qtreme forward position;

The invention relates to new and useful -Fig. 6-is a similar view but owing the improvements in sewing machines, and'more bracket for the auxilia feed dogs as swung particularly to a sewing machine havin a about its ivot to furt 16! remove the aux differential feeding mechanism and a p uiliary feed dogs from the loopers to aid in rality of needles andcooperating threaded the threading of the same;

loo ere; Fig. 7 is a front view of theauxilii n object of the present invention is in) feedidogs and the'supporting bracket there- '10 arrange the auxiliary feed dogs in a machine for; p v of the above type so thatsaid auxiliary feed. Fig. 8 is a perspective view showin 'a por- 20 dogsmay'be moved away from their-normal tion of the'feed bars, the mainfeed 0g, the

- so .100 are.

point'of operation to facilitatethe threading auxiliary feed dogs, and the throat plate, of the loopers; the Karts being separated to show more clear- 16 A further object of the invention'i's to 1v 't egconstmctionthereofy provide a sewinglmachine of the above char Fig. 9 is, a longitudinal sectional v'ew 26 actor with a throat late which is .smured at through the supporting bracket for the a its rear and only and is provided with slotted iliary feed dogs; a extensions which permit the auxiliary feed Fig. 10 is a detail showing a portion of 00 dogs to be moved'forwardly away from the the cloth' plate, the throat plate; and the loopers" to facilitate the threading of the coverplate which overliesthe throat plate. 7 The invention is direeted broadly to a still further object of the invention is to multiple needle sewin machine having -a providea machine of the above character feeding-mechanism wiichdncludes main '8 with a-worksnpport having a hinged section feed dogs and auxiliary feed dogs, the auxwith a supportin ghledge for the forward free iliary feed dogs being located in front of end of the throat plate,- and a cover plate. the needles and p peratingfltdfeed the maivhich is adapted to cover the slots at the" terialthereto. e stitching mechanism forward end of, the throat plate, which from certain aspects of the'inventionsin- 00 movable section of the cloth plate maybe chides needles and threaded 'riloopers coo vi'thdrawn from the front of the throat plate crating therewith, which needles are set in i 40 so as to ermit the auxiliary feed 'dogs'to a line substantially at right anglesto the be moved awav from the loopers and thus feed regardless of whether the loopers move facilitate the threading of the same; transversely of the line of feed or parallel '6 These and other objects will in part be with the line of It 'is diflicult to et obvious and will in part'be heroinafternnore 'at the loopers to threadthem', andthe infully disclosed. ventioniiadireotedto'a construction torsnp- In the drawings, which show h way'-of= porting thea'uxlliary feeddo whieh per illustration one embodiment of t e invenniits the :same to he moved-1. orward gaw ay I00 t1on: from the loopers in order thatrsaidlpopers Figure 1 is -a front view of a sewing mamaybe rendered accessible-through the} cod chine embodying my improvements; slots to assist in the threading of the loopers. Fig. 2 is an end view showing a part of From certain other aspects, the invention is the machine; directed more particularly to threaded loop- Fig. 3 isa sectional view at one side of the ers arranged transversely of the line of feed and in tandem and is directed to a construcon of feeding mechanism wherein auxiliary feed do s may be used with such an arrangement o loopers.

To permit the movement of the auxiliary feed dogs above referred to, the throat plate is provided with a plurality of slots extended to the front end thereof, and said throat plate is secured by screws disposed at the rear end of the throat plate. The cloth plate is provided with a swinging section whicli'has a supportinp ledge adapted to move underneath the forward edge of the throat plate so as to provide a support therefor during the normal stitching operation. The slots which permit the auxiliary feed dogs to move forward are in part covered by a cover plate carried by this-movable section of the work support.

Referring more in detail to the drawings, I have shown my invention as applied to a sewin machine which includes a bed plate 1 havlng tt standard 2 carrying an overhangingarni 3, in which a needle bar 4 reciprocates. Said needle bar is given its movements by a needle lever 5 connected to the needle bar by a link 6. and the lever 5 is operated by an eccentric strap 7 cooperatin with. an eccentric on the main shaft 8. arried by the bed plate 1 is a cloth plate 9. The cloth plate 9 is formed with a movable section 10 which is pivoted at 11 tothe main section of the cloth plate, and said pivoted section is adapted to be swung out wardly on the pivot 11. The throat plate 12 is secured to the main section of the cloth plate by screws 13 and 14. The forward end of this throat plate is free from connection with the cloth late but is supported by a ledge 15 earrietFby the movable section 10 of the cloth plate.

Mounted on the needle har 4 are a plurality of needles l6. l7 and 18. Cooperat. ing with the needle in beneath the work sup ort is a looper 1.9. cooperating with the IliftlB 17' is a looper 2t), and cooperating with the needle 18 is a looper 21. These loopers are all of the same, general construcas" and are of the threaded type. The loo'pers 20 and 2l are mounted on a looper carrier 22, which is pivotally mounted upon a looper support 23. The looper 19 is mounted upon. "a looper carrier 22. This looper carrier is also mounted upon the looper support 23. The two looper carriers ire connected by a link 24- and are oscillated by a link 24" which is connected to theneedle lever extension. These loopers are set so as to move back and forth in planes transverse of the line of feed, and each looper is given a needle avoiding movement in the well-known way. The material is held on the work support by a presser foot 25 carried by 'a presser bar 26. A i

The material is fed across the work support by a series of main teed dogs 27 and a series of auxiliary feed dogs 28. The main feed dogs 27 are carried by a bracket 29 secured to the main feed bar 30'. This main feed bar 30 is pivoted zit-31 to a feed rocker 32 which is of the usual construction. The main feed bar is raised and lowered by an eccentric 33 on the main shaft 8. The bracket 29 has spaced projecting bearings 34-. Mounted to slide freely in these' supporting hearings is a pair of rods 35 which are connected-to a link 36, and the link 36 is in turn connected to a bolt 37 adjustable in the slot 38 of a bracket arm carried by the feed rocker 32. These parts are in general similar to those shown in the patent to Mogatt, No. 1,217,328, dated February 27, 191

Mounted on the rods 35 are two bracket arms 39,, see Figs. 3 and 8. These bracket arms carry a cross head 40, and secured to said cross head 40 is a U-shaped bracket piece 41. Mounted on the forward end of said U-shaped bracket iece 41 is an'adjustable supportin shan 42 for the auxiliary feed do 8. T e U-shaped bracket piece 41 extends eneath the path of travel of the loopers and forms a clearance space therefor. In the present arrangement of the needles and 100 ers the bracket piece is shown as disposed etween the looper carriers. At the upper end of the supporting shank 42 of the auxiliary feed dogs is a dove-tailed recessed support 43. Pivotally carried by this sup orting shank is an arm 4A. This arm 44 a so has a dove-tailed recess 45, corresponding in cross section to the dove-tailed recess in the support 43. The auxiliary feed dogs 28 are carried by asupporting plate 46 which has a dovetailed rib 47 on its under faee adapted to loo slide. in the dove-tailed recesses. Said platen 46 is provided with a. laterally projecting lug 48. A latch 49 is pivoted at 50 to the shank 42 and a spring 51 normally tends to throw said latch in an upward direction..

Haid latch is provided with a notch 52 which is adapted to engage the In 48 when the slide is moved inwardly to its extreme inward posit ion. and in thispo sition the auxiliary i'crd dogs are set. for'th'eir normal feeding o 'wration. liy'relrasing: this latch from the lug 48. the slide may be movedfforwardly or toward the front ot' the machine, or to the position shown in Fig. 5. A 3 ring 53 carried by the pivot pin 54, whic secures the. arm 4-1 to the shank 42, bears againstfthe under i'are of the arm 44 and normally ,holds the same in horizontal position so that the dove-tailed recesses are in aliucment. When the supporting plate 46 is moved to the extreme forward position of its movement and away from the needles. then said plate is supported wholly by the arm 4;! and said arm 44 may be swung downwardly to the position shown in Fig. 6. In this position. the notch 52 in the. latch 49 engages the edge of the plate 46 and holds the arm in its inclined position against the tension of the spring 53.

The throat plate 12 is provided with feed slots 55. These feed slots are cut clear through to the forward edge of the throat plate. Said throat plate is also provided with needle 0 enings 56. The forward portion of the tiroat plate is inclined downwardly. as indicated at 57. Said throat plate has a thickened portion 58 at its forward edge. and this thickened portion is adapted to rest. on the ledge 15, as shown in Fig. 4 of the drawings. The work support is provided with an adjustable cover plate 59 which is mounted on the movable section 10. and said cover plate overlies the tapered edge of the throat plate and covers in part the slots in which the feed dog sections operate. Said cover plate may be formed with an edge guide 60 for directing the main fabric. indicated at F in the drawings. I have also shown in the drawings a guide and folder 61 for directing afecing strip which is to be stitched to the body fabric F.

In the normal operation of the machine, the auxiliary feed dogs are positioned as shown in Fig. 4. and said feed dogs 0 crate in the usual way to feed the fabric. on it is desired to thread the machine, the section 10 is swung on its pivotal support 11, which carries the cover plate 59 and the ledge 15 away from the throat plate, leaving exposed the open ended slots in the throat plate in which the feed dogs operate. The operator then depresses the latch 49 and moves the slide to its extreme forward position. as in Fig. 5. and then pushes down on the slide which tilts the arm 44. and thus moves the auxiliary feed dogs and the supporting plate 46 to the position shown in Fig. 6. This gives access to the loopers through the slots in the throat plate. so that the loopers may be readily threaded. The

" forward movement of the slide for the auxiliary feed dogs is limited by a stop screw 62 which is threaded into the arm 44 and extends into a. groove 63 in the under face of the slide 46. After the loopers have been threaded. the latch is depressed and the slide plate released. then the arm is turned to normal horizontal position and the slide moved in to bring the auxiliary feed dogs back to their normal position.

it is obvious that minor changes in the details of construction may he made without departing from the spirit of the invention as set forth in the appended claims.

Having thus described the invention. what I claim as new and desire to secure by Letters Patent is l. The combination of a. plurality of needles. threaded loopers cooperating with said needles. and a feeding mechanism including feed dog sections disposed in front of said needles. means for actuating the feed dog sections, and means for supporting said teed dog sections whereby the same may be moved independently of the actuating means therefor away from the needles; to give access to the loopers beneath thdtsame for threading the loopers. l

2. The combination with a plurality of needles, threaded loopers cooperating with said needles. and a feeding mechanism ineluding feed dog sections located in front of said needles, means for supporting said feed dog sections whereby they may be moved forward and tilted downwardly in order to give access to the loopers for threading the same.

3. The combination with a plurality of needles, threaded loopers cooperating with said needles. a throat plate having feed slots formed therein, and a feeding mechanism including feed dog sections arranged in front of the needles and disposed in said feed slots, said throat plate having the feed slots extended to the forward edge thereof, and means whereby said feed dog sections may be drawn forwardly in said slots to give access to the loopers for threading the same.

4. The combination with a plurality of needles, a threaded looper for each needle arranged in a line substantially at right angles to the line of feed, and a feeding mechanism including feed dog sections arranged in front of said needles. and means for supporting said feed dog sections whereby they may be moved forwardly away from the needles to give access to the loopers for threading.

'5. The combination with a plurality of needles. :1 throat plate having feed slots therein. a looper cooperating with each needle and arranged in a line substantially at right angles to the line of feed. and a. feeding mechanism including feed dog sections arranged in the feed slots in the throat plate in front of said needles, and means whereby said feed dog sections may be moved forwardly away from .the needlesto give access to the loopers through the feed slots in the throat plate for the threading of the loopers.

6.7The combination with a. plurality of needles. a. threaded loopcr for each needle arranged in a line substantially at right angles to the line of feed. a throat plate having a plurality of feed slots formed therein extending to the front end of said throat plate. a work support having a hinged section for covering the front ends of said slots. and a feeding mechanism including feed dog sections arranged in the feed slots in front of the needles, and means llt) III;

.llxed at' its rear end i pressed for supporting said feed dog sections where by the same may be moved forwardly awa from the needles to give access to the loopers beneath the throat plate for threading the same.

7. The combination with a plurality of needles. a threaded looper cooperating with each needle. a work support, a throat plate fixed at its rear end to the work support. said work su port having a pivoted section provided witi a supporting ledge for the front end of said throat plate, said throat plate having feed slots formed therein ex tending to the front edge of the throat plate. and a feeding mechanism including feed dog sections arranged in the feed slots in the throat plate. and means for su porting said feed dog sections whereby t ey may be moved forwardly to give access to the loop,- ers through the feed slots in the front plate for the threading of the loopers.

8. The combination with a plurality of needles, a threaded looper cooperating with each needle, a work support. a throat plate to the work support. said work support having a pivoted section provided with a supporting ledge for the front end of said throat plate. said throat plate having feed slots formed therein extending to the front edge of the throat plate. and a feeding mechanism including feed dog sections arranged in the feed slots of the throat plate in front of the needles. a sliding plate carrying said feed do sections, a. pivoted arm supporting said sli ing plate. and means whereby said arm may be raised and lowered to move the feed dog sections away from the throat plate.

9. The combination with a plurality of needles, a threaded looper cooperating with each needle, a work support, a throat plate fixed at its rear end to the work support. said work sup ort having a pivoted section provided wit a supporting ledge for the front end of said throat plate. said throat plate having feed slots formed therein extending to the front edge of the throat plate, and a feeding mechanism including feed dog sections arranged in the feed slots of the throat plate in front of the needles. a sliding plate carrying said feed dog sections, a pivoted arm supporting said sliding plate, a spring for normallv holding the arm raised, and a 'pivoted latch for holding the arm in deposition with the feed dogs moved away from the throat plate.

10. The combination with a'plurality of needles, a threaded looper cooperating with each needle, a work support. a throat plate fixed at its rear end to the work support, said work su port having a pivoted section provided wit a supporting ledge for the front end of said. throat plate. said throat plate having feed slots formed therein extending to the front edge of the throat plate. and a feeding mechanism including i'ccd dog sections arranged in the feed slots in front of the needles. a sliding plate 'ar- \'iug said t'ccd dog sections. a support havmg plate. a. supporting arm having a recess in alincincnt with the recess in the support whcrcby said sliding plate may be moved into the recess in the supporting arm to withdraw the feed dog sections from in from of die needles. and a latch adapted to engage said sliding plate and hold the feed dog Sti'llillls in normal feeding position.

ll. The combination with a plurality of needles. ii threaded looper cooperating with each needle. a work support. a throat plate hxcd at its rear end to the work support, said work support having a pivoted section provided with a supporting ledge for the front eiul of said throat plate. said throat plate having feed slots formed therein extending to the front edge of the throat plate. and a fccding mechanism including feed do" sections arranged in the feed slots in frdnt of the needles. a sliding plate carrving said feed dog sections. a support having a recess adapted to receive said sliding plate. a supporting arm having a recess in alinement with the recess in the support Wherebv said sliding plate may he moved into the recess in the supporting arm to withdraw the feed dog sections from in front of the needles a latch adapted to engage said slidin platd and hold the feed do sections in hormal feeding position. said supporting arm being pivolallv mounted on the first-named su port for the feed dog sections wherebv said supporting arm may be, lowered, a spring for raising said arm. and means wherebv said. latch is adapted to hold the arm deprcsscd with the feed dog sections moved' away from the throat plate.

12. The combination with a pluralit of needles. a work support. a throat plate xed at its rear end to the work support, said throat plate having feed slots formed therein extending to the front edge of the throat plate. threaded loopcrs cooperating with the needles and disposed beneath the throat plate. feed dog sections located in said feed slots in front of the needles. means whereby the feed dog sections mav be moved forwardly in said slots away from said needles, and a cover plate carried by the work support and covering the extreme front end of the slots when said teed dog sections are in normal feeding position.

13. The combination with a plurality of widely spaced needles arranged in a line at an angle .o the line of feed. a threaded looper cooperating with each needle, and a feeding mechanism including main feed dogs located substantially in rear of the needles. auxiliary feed dogs located in front of the needles, means for actuating said feed a recess adapted. to receive said sliding I dogs, a U-shaped bracket disposed between said needles and supporting said auxiliary feed dogs, and means whereby said auxiliary feed dogs may he moved independently-of the actuating means therefor forwardly relative to the supporting bracket therefor to render the loopers accessible for threading.

H. The combination with a plurality of spaced needles arrun ed in a line at an angle to the line of feed, a threaded loopercooperating with each needle and arranged to move in a line at an angle to the line of feed, and a feeding mechanism including main feed dogs substantially in rear of the needles, auxiliary feed dogs in front of said needles, and a U-shaped bracket for supporting said auxiliary feed dogs, said U-s'haped bracket being disposed so as to form a clearance space for one of the loopers and the actuating mechanism therefor, said support for the auxiliary feed dogs being constructed so as to permit said feed dogs to be moved forwardly away from the needles to ive access to the'loopers for the threading o the same.

15. The combination with a plurality of needles and a threaded loopcr cooperating with each needle, said needles and loopers being dis need in a plane substantially at right ang es to the line of feed, means for oscillating said loopers, a looper support on which both loopers are mounted, means for oscillating said support for giving the loopers a needle avoiding movement, and a feeding mechanism including main feed dogs disposed substantially in rear of the needle auxiliary feed dogs disposed substantially in front of said needles, :1 U-s'haped bracket for supporting said auxiliary teed dogs and forming a clearance space for one of said loopers and the actuating mechanism therefor, and means whereby said auxiliary feed dogs may be moved relative to the supporting bracket therefor for giving access to the loopers for threading.

In testimony whereof, I aflix my signature in the presence of two witnesses.

JOHN E. CHALMAN. Witnesses:

S. GEORGE TATE, ARTHUR F. LARRABEE.

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