US1117160A

US1117160A - Sewing-machine cutting mechanism.

Info

Publication number: US1117160A
Application number: US215795A
Authority: US
Inventors: John Bigelow
Original assignee: Union Special Machine Co
Current assignee: Union Special Machine Co
Priority date: 1900-05-22
Filing date: 1904-07-08
Publication date: 1914-11-17
Anticipated expiration: 1931-11-17

Description

J. BIGELOW.

SEWING MACHINE CUTTING MECHANISM.

APPLICATION FILED JULY 190A.

Patented Nov. 17, 1914.

5 SHEETSSHEET 1.

Witnesses J. BIGELOW. SEWING MACHINE CUTTING MECHANISM. APPLICATION FILED JULY 8, 1904.

1,1 17,160", Patented Nov. 17,1914.

- 5 SHEETSSHEBT 2.

a glugeul'oz @Xhhuzaaw' 6 ailyr/wb WW ww Scrum;

J. BIGELOW.

SEWING MACHINE CUTTING MECHANISM.

APPLICATION FILED JULY 8, 1904 1,1 17, 1 60. Patented Nov. 17, 1914.

5 SHBETSSHEET 3 J. BIGELOWM Patented Nov. 17,1914.

5 SHEETS-SHEET 4.

anvenl'oz J. BIGELOW.

SEWING MACHINE CUTTING MECHANISM.

APPLICATION FILED JULY 8, 1904.

Patented Nov. 17, 1914 5 SHEETSSHEET 6.

lvwenfoz UnrrED STATES PATENT OFFICE.

JOHN'BIGELOW, OF MINNEAPOLIS, MINNESOTA, ASSIGNOR TO UNION SPECIAL MACHINE COMPANY, OF CHICAGO, ILLINOIS, A CQRPORATION OF ILLINOIS.

SEWING-MACHINE CUTTING MECHANISM.

Specification of Letters Patent.

Patented Nov. 1 7, 1914.

Original application filed May 22, 1900, Serial No. 17,552. Divided and this application filed July 8, 1904. Serial No. 215,795.

plication filedin the United States Patent Ofiice May 22nd,1900, Serial No. 17,552, and patented December 31, 1907, No. 875,311.

The present invention relates to the mechanism for cutting the threads between any two consecutive sacks, but it will be understood that so far as the cutting members are concerned, they might coiiperate in the manner set forth to sever a continuous strip of material.

So far as the main features of the apparatus are concerned, reference is made to the aforesaid parent application, but the present invention consists in certain matters hereinafter described and referred toin the appended claims.

The invention is illustrated in the accompanying-drawings, in which,

Figure 1 is a front elevation of a filled bag sewing machine embodying my invention; Fig. 2 is a vertical cross section on the line u -o of Fig. 1; Fig. 3 is an end view of the cutter or clipper; Fig. 1 is a plan view thereof; Fig. 5 is a section on line m w Fig. 3; Fig. 6 is a section on line 2z, of Fig. 3; Fig. 7 is a view similar to Fig. 3, but showing the opposite side or end of the clipper; and Fig. 8'is a vertical sec-' tion on the line yy of Fig. 4. Fig. 9 is a horizontal section on line 99 of Fig. 1.

As above stated, the present'invention relates to the mechanism employed for automatically .cutting the thread 'or chain of stitches between the bags; that is, the bag that has been sewedand the one in-the machine. This mechanism is preferably arranged at the delivery end of the work plate. Either the bracket 31 or the arm 51 which extends back of the sewing head is provided with a plate 119, and tothis is attached a block 120 having three

arms

121, 122 and 123, the latter being provided with the upwardly extending

arms

123 and 123". The arm 121 carries the pivot pin 121, for the yoke lever 125, the lower end of which engages with the end of the arm 126, arranged on the shaft 105, and opposite to the. arm 107. The upper end of the lever 12.) is connected by a link 128 to the upper end of a short lever 129, the lower end of which is pivoted on the pin 130 in the side of the block 121. These parts between the shaft 105 and the pin 130, constitute the means forlsetting the clipper when the machine started by the throwing of the knee lever 106 The clipper comprises the knife or crushing edge-132, and the cylinder 1325 upon which the knife closes. The cylinder 133 is fastened in a pocket that is drilled therefor in the bottom of the arm123, which pocket cuts through the face of the arm or block so that the surface of the hardened steel cyllnder projects slightly beyond the face of the arm 123. The cylinder is held in place by a screw 13% upon loosening wh ch the cylinder may be taken out or turned slightly to present a fresh surface to the cutting edge of the knife. The knife 132 is mortisedinto theweighted end 135 of the clipper arm 136. The mortise or pocket 135 for the knife 132 is preferably made partly in thesolid part of the arm 136 and partly in the cap or block 135" upon the inner side thereof. The knife is secured by the adjusting screw 137 and the set screw 138. The clipper arm- 136 is provided with bosses or a sleeve 139 jounnaled upon the short shaft 140 extending between the upper ends of the

arms

123 and 123". On the same shaft 140 is the escapement member 141 provided with a hand setting lever 142. The sleeve 139 and the member 1 11 carry the arms 14.3 and 144: respectively. These arms are held together by the buffer-spring 145 arranged between the arm 113 and the head of a curved bolt or pin 146 that is fastened in the part 144.

147 is a strong spring coiled around the boss or hub of the escapement member 141 and fastened to said member and to the arm 123 so as to throw the member forward and thereby throw down the clipper arm 136. The member 141 is provided with-a laterallyextending lug 148, which, whenthe member is raised or set with the arm l36 in'its raised position, is removed from the arm 123, but

when the member 141 is released said lug l t-8 will strike said arm 193 before the knife of the clipper strikes the cylinder or cutting surface 133, after which the clipper arm continues its movement because of its reomentum. At -this time the spring 145 is compressed, and the knife strikes the cylinder 133 and is then instantly Withdrawn. to the position shown in Fig. 3 by the reflex action of the spring 14-5.

:29 is a stop screw provided on the clipper atrial-3'6 to strike the face of the block when the is thrown down, see 8, By means of the screw M9 the device is so a, adjusted that the sharp edge of the knife just meets the surface of the hardened cylinder 133 and then rebounds, so that the knife is not dulled except by the actual Wear oi the thread thereon. As the thread or chain of stitches tomes from heneath the i seer foot 130 it is held up by the which haspassed the clipper, and by a shall ledge 150 that is provided upon the yrork- .plate so that the thread will always or 2.5 stretch across the cutting surface 133 ready for the descent of the knife, (see Figs. 3, ilandil.

- The lever 129 before referred to,

trigger lever 1.51, the rear ich Weighted and; LiQIVfLBYQi carries end of move v link and the lever 129. The trig then engages with the escapement mere- Ml to rotate the same until it is caught and held by the latch lever 154C, tl'ie forward curl of which engages a sh0ulder'155 on the member l lh'holding the member under the tension of the spring 147 with the clipper arm in a raised position. When the parts are in tli'ese positions, it is only necessary to free the'latch 154: to allow the lmiife to descend and c1 or clip the thread irnniediately open-seas not to interfere the next hag. The release or the latch aceomplished automatically and depends upon the passage of the hag. is a rock shaft arranged on the arms E3 22 and 123 adapted to be operated by the gravity arm or tri 157. Said shaft 156 also carries theachustahle rocker 158 provided with the cross-pin 159 that is iii) adapted to successively engage the pins 168 and 161 in the rear ends oi the levers 151 i541 thus when the arm 15! drops the n )4 h 1 .ng trigger 191 Will nrst be moved out of the slum r 153 of the ement member and thee. the leeh lrnife. The arm 15'? is extensible, as shown in Figs. 1 and 3 to 8, low level of the Work plate 0. we sewing head, so that the arm will he struck the knife or crushi i be thrown to release said. member and only poiver necessary for its operation is derived from the shifter lever which the operator throws with his leg or knee against the resistance of the shifter spring 115 and the small spring 147 of the clipper.

The operation of my device will be obvious. As the knee lever 106 is operated to start the machine the clipper carrying will be raised hythe lever 1.29 througii the trigger lever 151. The clipper is held in elevated position or set by latch lerer 154. The latch is operated by the arm or trip 157, as it drops from the bag and thus releases the clipper which isnioved by the spring 14:7

to sever the thread The spring 1&5 immediately after the severing action, moves the clipper away from the cylinder siifii to allow the passage of the sucseeding sack.

.L a M ii i L .ris the so see i-eaves 1 jlie sewingiineche J. chair s itches will he formed be .i th e, at 1 this chain will the ledge upon the work plate and across the clipper block-in readiness to he cut by the lrnite when the arm 157' falls, after having been pre viously raised by the passing of the bag. The clipper may be set by hand and released by hand, if desired, and the machine may .be stopped at any time by throwing the heed trip 117 to disengage the trigger 110, "whereupon the may he removed from the machine after li the resser foot. 5

Having time described myiiivention, what I claim as new, and desire to secure by Letters Patent, is:-

l, in an apparatus for sewing tilled hag-5's, sewing" iechanisin and a cutting" apparatus controiled by the passage of a bag for severing the threads hetween the bags including two vcoiiperating members, which when in operative position embrace between them the thread to he severed, means for causing cooperative action between said members, and means operating" immediately after the severing action for positioning one oi? said members to allow the passage of the succeeding bag, suhstantially as described.

2. ln s, fiiled hag sewing machine, the combination, with sewing mechanism, of clipper arranged upon the delivery side of said heal, and ini'zluding' knife, means for for operating said knife, a supporting 3. In a filled-bag sewing machine, the

combination -with"'.sewing mechanism, a

clipper for severing the threads between bags including a rebounding knife, means frame, and -a hardened cylinder carried by said frame and lying in the plane of movementof said 'lmife.

4. In a filled bagsewing machine, .the bombin'ation', with a sewing mechanism, of a clipperfor severing the thread between two bags includinga rebounding knife, a frame therefor, a hardened cylinder set into saidv framewithits surface projecting therefrom, a fastening device for said cylinder which permits-the presenting of new surfaces upon said cylinder. to said knife, and means for operating said knife, substantially. asne.

scribed.

5'. In a filled bag. sewing machine, the

combination, with sewing mechanism, of a.

clipper for severing thethread between two bags; including a frame, a rebounding knife 1 mounted on said frame, a stop for said knife, a hardened surface on said frame lyingin the'plane of movement of the cutting edge of the knife and cooperating therewith, substantially as described.

6. In a filled bag sewing machine, thecombination with sewing mechanism, of a clipper for severing the thread between two .bags including a frame, an arm pivoted thereon, a knifecarried by said arm, an adjustable stop for said arm, a hardened piecein saidframe, a spring operated member connected with said arm, and means for setting .and releasing said member, substantially as described.

7 In a filled bag sewing machine, the combination, with sewing'mechanism, of a clipper for severing the thread between two bags, including a knife, an arm supporting said knife, -a spring operated member for actuating said arm, a setting pawl, means for setting the-same when the sewing mechanism is started, a latch for said spring operated member, and a tripfor disengaging said latch, substantially as described.

8. In a filled bag sewing machine, the combination, with sewing mechanism, of a clipper for severing the thread between two bags including a knife, a setting pawl, a latch pawl and a swinging arm or trip adapted to successfully operate said setting and said latchrpawls, substantially as described. I 1

9. In a filled bag sewing machine, the combination, with sewing mechanism, and feeding mechanism, of a clipper comprising a knife, and operating and controlling means therefor. including devices adapted to be set when the sewing mechanism is started,

bag by said devices.

10. In a filled bag sewing machine, a

clipper comprising-a crushingv member, a

co6perating.men1ber,-means for operating said crushing member, whereby the connecting loops of two b'ag's are'severed by a single crushing blow, said operat'ing means includ ing a trip falling from the top of one of the bags as the bag passes said trip.

11. In a bag sewing machine, a clipper comprising a wedge-shaped cutter, an anvil lyingin the plane of movement of the cutting edge and cooperating therewith, means for operating said cutter including devices controlled by the passage of the bag, and means for moving the cutter out of severing-- position to allow the passage of the succeeding bag.

12. In a bag sewing machine, a clipper comprising a wedge shaped cutter, an anvil, means for operating said cutter including devices controlled by the passage of the bag, and means independent of the operating means for withdrawing the cutter from the path of the bags.

13. In a bag sewing machine, a clipper comprising a wedge-shaped cutter, an anvil, means for operating said cutter including devices controlled by the passage of the bags, and spring controlled means operating to {)vithdraw the cutter from the path of the ags.

14. In mechanism of the class desscribed,

the combination with severing mechanism movable from a set position, of means for moving it from its set position, means for holding .thesevering mechanism in its set position against the action of the moving means, and a trip for operating the holding means to release the severing mechanism and permit its actuation bythe moving means, said trip being normally held inoperative by the article to be severed.

15. In mechanism of the character described, the combination with mechanism movable from a set position, of a spring for moving it from said set position, means for holding the severing mechanism in its set position against the action of thespring, and a trip for operating the holding means to release the severing mechanism and permit its actuation by the spring, said trip being normally'held inoperative by the article to be severed.

16. In mechanism of the class described,

severing tion of the chain, a trip for holding said lulu,

member with the spring under stress, and automatic mechanism for releasing the trip.

2%. lo. a sewing machine, stitch-forming mechanism, a severing member, means for operating said member including a spring, a trip for holding the same With the spring under stress, and means under the control of the fabric for moving the trip to release position.

25. In a sewing mechanism, stitch-forming mechanism, a severing member, means for operating said member including a spring, a trip for holding the same with the spring under stress, and a trip-releasing means arranged to engage with the fabric adjacent to the presser foot of the machine.

In a sewing; machine, chain stitch- 17. In mechanism of the class described, the combination with a cutting. member movable from and to a set position, of means for holding the member in its set position, means for moving it to its set position, and a trip for d sengaging the member from its holding means, said trip being normally held inoperative by the article to be cut.

18. In mechanism of the class described, the combination with movable cutting member, of means for moving it in one direc tion, a device for holding the member against movement by said means, means for moving the cutting member into engagement with the holding device, and means controlled by the article to be cut for re: leasing said member from the holding device. forming mechanism, a cl1ain-severing mom 19. in mechanism of the clas desc. her, a spring for impelling the same in the the combination \v' a out direction of the chain, a trip for holding said member with the spring under stress, and a trip'releasing means held in inoperative position by engagement with the article sewed.

27. A sewing machine including in combination, stitch-forming mechanism, feeding mechanism and thread-severing devices, said thread-severing devices comprising an anvil and a movable cutting member, said movable cutting member being located at ri ht angles to the line. of feed and saicllann receiving the impact of said movable member and means controlled by the article being stitched for operating said movable member.

28. A sewing machine including in combination, stitch-forming mechanism, a feeding mechanism, thread-severing devices including an anvil located in the line of feed and. operating to support the thread bemember, oi a so; .1( l 12:16 in bar in one direction, a device for holdin the member against movement by said spring, means for the cutting member into engagement with the holding device against the tension of the spring, and means controlled by the article to be cut for releasing the cutting member from the holding de vice.

20, In mechanism of the class described, the combination with article sev l m ans for moving the so 7 mechanism for holding" art. e-severing means against operative movement by the moving means, and means held inactive by the articles to be severed for releasing the severing means from the holding mecha- IllSIH,

21. In a sewing machine, the combination of stitch forming mechanism for stitching articles and forming a connecting chain of stitches between the same, a chain. severing member, and means operating independently of the article for holding said severing member from. engagement with the chain and means controlled by the articles being stitched for releasing said holding means.

22. In a sewing machine, the combination of stitch forming mechanism for stitching; articles and forming a connecting chain of stitches between the same, a chain severing member, means for operating said member including a spring, means operating independent of the articles being stitched for holding said severing member from engagement with the chain, and means controlled by the articles being stitched forreleasing said holding means,

2-3. In a. sewing machine, stitch-forming mechanism for stitching articles and forming a connecting chain of stitches between the same and a chainsevering member, a spring for impelling the same in the direc-.

member, and means controlled by the article. bein stitched for operating said movable mem er. o

29. In a sewing machine, a severing member, means for operating the same including a spring, a trip for holding the same away from the chain, a lever movable independently of the trip in one direction and positively engaging said trip When moving in the opposite direction, and a fabric-controlled means through which movement is imparted to said trip.

30. in a sewing machine, a severing device, means for operating same includ ing a spring, means for moving said severing device away from the thread, means for locking the severing device in its with drawn position, and automatic meanslirir releasing the severing device.

31. A filled bag sewing machine includmg in combination a supporting frame, a support for the filled bags projecting forvardly from. the front face of said support mg frame, a sewing head overhanging said tween stitched articles, a movable cutting support, stitch forming mechanism carried by said sewing head for stitching filled bags and for forming a connecting line of thread between the same, and means for severing said line of thread connecting the filled bags, including an arm movably supported in rear of the plane of travel of the mouth of the bags being stitched so as to move in a plane substantially at right angles to the path of travel of the bags, said arm having a severing member, a cooperating severing member located in rear of the plane of travel of the mouth of said bags, and means for actuating said movable arm.

32. A filled bag sewing machine including in combination a supporting frame, a support for the filled bags projecting forwardly from the front face of said supporting frame, a sewing head overhanging said support, stitch forming mechanism carried by said serving head for stitching the .filled bags and forming a connecting line of thread between the'same, and means for severing the line of thread connecting the filled bags including a supporting arm pivoted in rear of the plane of travelof the bags being stitched to swing in a-plane substantially at right angles to the connecting line of thread, said arm having a severing member, a cooperating severing member.

also located in rear of the plane of-travel of the mouth of said bag, and means mounted on said supporting frame for actuating said pivoted arm.

In testimony whereof I aflix my signature in presence of two witnesses. v JOHN BIGELQW. \Vitnesses A. C. vPAUL, C. G. HANSON.