US2633092A - Sewing machine - Google Patents

Sewing machine Download PDF

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Publication number
US2633092A
US2633092A US84612A US8461249A US2633092A US 2633092 A US2633092 A US 2633092A US 84612 A US84612 A US 84612A US 8461249 A US8461249 A US 8461249A US 2633092 A US2633092 A US 2633092A
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US
United States
Prior art keywords
shaft
revolving
lever
feeder
axle
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
US84612A
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English (en)
Inventor
Robert Ramon Casas
Court Jean
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Mefina SA
Original Assignee
Mefina SA
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Mefina SA filed Critical Mefina SA
Application granted granted Critical
Publication of US2633092A publication Critical patent/US2633092A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • D—TEXTILES; PAPER
    • D05—SEWING; EMBROIDERING; TUFTING
    • D05B—SEWING
    • D05B69/00—Driving-gear; Control devices
    • D05B69/30—Details
    • D—TEXTILES; PAPER
    • D05—SEWING; EMBROIDERING; TUFTING
    • D05B—SEWING
    • D05B57/00—Loop takers, e.g. loopers
    • D05B57/30—Driving-gear for loop takers

Definitions

  • SEWING mum - mea um :51. 1949 4 Sheets-Sheet s March 31, 1953 R. cAsAs ROBERT ETAL SEWING MACHINE Filed Mrch 51, 1949 4 Sheets-Shet 4 Patented Mar. 31, 1953 SEWING MACHINE Ramon Casas Robert and Jean Court, Geneva,
  • the present invention relates to a sewing machine including a main shaft actuating a needlebar, a thread-puller, a feeder actuated by a revolving driving element and a rotary shuttle.
  • This machine avoids the above mentioned drawback since the main shaft is connected to the revolving shuttle and to the revolving driving element for the feeder by a single flexible connecting member running on four sprocket wheels, of which three are fastened respectively to the main shaft, to the revolving shuttle and to the revolving driving element of an actuating mechanism for the conveyer.
  • FIG. 1 and 2 are side views, with parts cut away from the free arm and from the needlecarrying arm of the machine, the column bearin these arms being partly shown.
  • Fig. 3 is a top view of the free arm, some parts of its walls and of the mechanisms therein enclosed being cut away in order to expose the flexible connecting member.
  • Fig. 4 is a perspective view of the mechanisms arranged in the free arm and of their connection to the main shaft of the machine.
  • Fig. 5 is a detail view.
  • Fig. 6 is a perspective view of a clamp and of its fastening device, ready to be fixed to a belt.
  • the sewing machine includes a free arm I and a needlecarrying arm 2 supported by a column 3. These three parts form together a casing containing and safeguarding the various mechanisms of the sewing machine, of which only those necessary for a proper understanding of the invention will be described here.
  • the needle-carrying arm 2 is traversed over the greatest part of its length by a main shaft P, carrying at one of its ends a fly-wheel 4 and a driving pulley 5.
  • This shaft P revolves in bearings 6 (of which only one is visible on Fig. 1) fastened to the casing of the machine.
  • the free arm contains the actuating mechanisms for the feeder and for the shuttle elements. These mechanisms are described in U. S.
  • the feeder I (Fig. 4) is fastened to a support 8 carried by two levers 9 and [0 of which one, 9, is rigid and rocks around a vertical shaft ll, while the second, I0, is elastic and rocks around a horizontal shaft l2.
  • the lever 9 is provided with an extension 9a angularly adjustable relative to lever 9 by means of screw '0.
  • lever 9 carries an actuating element l4 provided with a cam follower surface l6.
  • Element I4 is fixed to several rods axially slidably mounted on the end of lever extension 9a and subjected to the action of a spring [5 tending to keep surface H5 in contact with the profile of the cam l3.
  • this actuating element l4 carries a part I! slidably engaged in a slot in a guide l8 which is mounted so that it will not reciprocate with part I1.
  • a guide i8 is fixed on the lower end of a rotatable shaft 11 so that the angle of inclination of the slot therein in relation to a plane perpendicular to the driving axle ll! of the cam 13 can be chosen and fixed at will by adjusting elements described in copending application Serial No. 84,608.
  • the arm 9 carries a shaft '23 sliding in guides 24 arranged in the support 8.
  • the lever I carries a finger 2I urged by a spring 2-2 in contact with the profile of the cam I3, while its end is hinged to the support 8 by means of an axle 26 revolving in a bearing arranged in the support 8.
  • this lever Due to the flexibility of this lever [0 its end is capable of following the :rocking movement of the support 8 in the horizontal plane, imparted by the lever 9, and, in addition, the lever 9 can follow freely the rocking movement in the vertical plane, imparted by the lever I9, due to the fact that, on the one hand,'the end of this lever is hinged to the support 8 by means of the axle 26 and, on the other hand, that this support slides along the axle 23 carried by the end of the lever 9.
  • the feeder is simultaneously actuated in synchronized horizontal and vertical rocking movements, so that it runs along a closed path.
  • the revolving shuttle includes a revolving cup 21 fastened to a sleeve 28 (Fig. 2) revolving freely on an axle I4 rigidly fastened in the casing of the free arm I, and a bobbin 29 (Figs. 3 and 4) carried by a support 30 kept in a fixed angular position, by mobile stops 3
  • the mobile stops 3I and 32 are carried by one of the arms of a lever 36, of which the other arm is kept, by an elastic action, in contact with the profile of a cam 35 carried by the shaft I9.
  • This lever 36 is hinged to the frame of the machine by means of a "spring blade 31 fixed, on the one hand, by fastening organs 38 to a part 40 fastened to the frame of the machine, and, on the other hand, by fastening organs 39 to a portion of the lever 36
  • the main shaft he riving shaft I9 and the sleeve 28 carrying cup 21 are mechanically connected between themselves by a single flexible connecting element 4
  • the sprocket wheels 42 and 43 are of the same diameter, since the revolving speeds of the main shaft and of the driving shaft are the same. On the contrary, the cup 21 having to revolve at twice the speed of the main shaft, the chain wheel 44 has a diameter equal to the .radius of the chain wheel 42.
  • the flexible connecting element consists of a belt fitted with equidistant lugs 5
  • a controlling device 6! consisting of a screw threadedly mounted in a part of the frame and of which the end acts on the rocking support 48, makes it possible to tighten to a greater or a lesser degree the belt and to obtain a smooth and silent running of the machine. Indeed, no slack at all should exist in the described transmission, so that absolute synchronism of the movements of the needle A, of the conveyer I and of the cup 21 is automatically ensured, which enables the formation of a seam of perfect regularity.
  • the sprocket wheel 42 In order to permit the movement of the sprocket wheels '43 and 45 in relation to the sprocket wheel 42, necessary to the obtention of the desired belt tension, the sprocket wheel 42 has a Width e greater than the width b of the belt.
  • the relative position of the extension 9a of the lever 9 can be fixed by means of a screw 12.
  • the middle position of the part I! can be fixed independently from the position occupied by the driving shaft I9.
  • the cam follower surface I6 is provided on a removable small plate 62 having a slot 63.
  • This small plate is mounted in a recess 64 in the actuating element I4 and is clamped in this housing by means of a screw 65 traversing the slot 63 and of a flange 66, engaged under the head of this screw 65.
  • this guide I8 is chosen and fixed as described in detail in copending application Serial No. 84,608, by acting on the lever pivoting on the bearing 6 of the main shaft P, and of which one of the arms 1 emerges from the casing of the machine through a port I5 made in said casing.
  • the other arm g cooperates with a cam follower I6 fastened to shaft I1 carrying the small plate.
  • the described flexible connection linking the main shaft to the driving shaft and to the shuttles sleeve makes it possible, not only to obtain a silent working of the machine as well as the obtention of a machine capable of doing rectilinear seams which are absolutely regular, from their length point of view as well as that from their tension, but also to incline the axle of the shuttle in relation to the vertical in a plane perpendicular to the advancement displacement of the feeder l, which, as described in our copending application Serial No. 84,611, makes it possible to obtain a very great regularity of the stitches of a zig-zag seam or of a decorative motive.
  • guards 68 partly surround the four sprocket wheels.
  • is smaller than the height h of the lugs 5
  • the latter consist of semi-cylindric elements 69 (Fig.
  • the belt consists preferably of a woven ribbon and the spikes 10 have sharp ends. It is thus possible to set in place the half-cylinder on the belt without provoking rents, the spikes 10 being driven between the fibers of the woven ribbon. If care is taken to drill holes 12 of circular transversal section, there is practically no risk at all of cutting off fibers when riveting the spikes to the small plate H.
  • a sewing machine comprising a main shaft, a needle-bar and a thread-puller driven by said main shaft, a feeder, a revolving driving element for said feeder, a revolving shuttle, a sprocket wheel fixed to the main shaft, a second sprocket wheel fixed to the feeder driving element, a third sprocket wheel fixed to the revolving shuttle, a fourth idler sprocket wheel mounted adjacent said second sprocket wheel, and a single flexible endless driving element running on said four sprocket wheels, said feed driving element and said idler sprocket being interposed between said main shaft and said shuttle in the path of said endless driving element, and the axes of the feed driving element and said idler sprocket being in planes substantially perpendicular to the axis of the main shaft and with the main shaft and the shuttle spaced transversely from the axes of said feed driving element and said idler sprocket.
  • a sewing machine as claimed in claim 1 and comprising a rocking support, an axle for said support disposed parallel with the rotation axis of said revolving element driving said feeder, the second and fourth of said sprocket wheels being carried by said rocking support and means for urging said rocking support against the tension of said flexible element.
  • a sewing machine as claimed in claim 1 and comprising a rocking support, a shaft bearing the second sprocket wheel and said revolving element driving the feeder, said shaft revolving freely in a bearing provided in said rocking support, an axle mounted on said rocking support, the fourth sprocket Wheel revolving loosely on said axle, an axle for said rocking support mounted on a fixed part of said machine and disposed parallel with the rotation axis of said shaft bearing said second sprocket wheel and said revolving element driving said feeder and means acting on said rocking support for adjusting the tension of said flexible connecting element.
  • a sewing machine as claimed in claim 1 and comprising a rocking support, a shaft bearing the second sprocket wheel and said revolving element driving the feeder, said shaft revolving freely in a bearing provided in said rocking support, an axle mounted on said rocking support, the fourth sprocket wheel revolving loosely on said axle, an axle for said rocking support mounted on a fixed part of said machine and disposed parallel with the rotation axis of said shaft bearing said second sprocket wheel and said revolving element driving said feeder, means acting on said rocking support for adjusting the tension of said flexible connecting element, an actuating mechanism linking mechanically said feeder to said revolving element, and. an adjusting device provided on said actuating mechanism for selecting and fixing the middle position of said feeder independently of the position occupied by said shaft carried by said rocking support.
  • a sewing machine as claimed in claim 1 and comprising a rocking support, a shaft bearing the second sprocket wheel and said revolving element driving the feeder, said shaft revolving freely in a bearing provided in said rocking support, an axle mounted on said rocking support, the fourth sprocket wheel revolving loosely on said axle, an axle for said rocking support mounted on a fixed part of said machine and disposed parallel with the rotation axis of said shaft bearing said second sprocket wheel and said revolving element driving said feeder, means acting on said rocking support for adjusting the tension of said flexible connecting element, a cam carried by said shaft, an actuating mechanism linking said feeder to said cam, a cam follower fastened to said actuating mechanism and cooperating with said cam, and means to adjust the position of said cam follower with respect to a lever of said actuating mechanism, which lever drives said feeder in a horizontal to and fro movement.
  • said actuating mechanism comprises a second lever which is elastic, a finger fastened to said second lever and cooperating with said cam under an elastic action, said lever imparting a vertical to and fro movement to said feeder.
  • a sewing machine as claimed in claim 1 and comprising a rocking support, an axle for said support disposed parallel with the rotation axis of said revolving element driving said feeder, a shaft driving said revolving element and bearing the second sprocket wheel, a bearing in said rocking support, said shaft revolving in said bearing, the axis of rotation of said shuttle being inclined in relation to the vertical in a plane perpendicular to the advancement stroke of said feeder, an axle carried by said rocking support and bearme said fourth sprocket wheel, said axle being inclined in relation to the horizontal in a vertical plane parallel with said shaft, and means acting on said rocking support for adjusting the tension of said flexible connecting element.

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Sewing Machines And Sewing (AREA)
US84612A 1949-01-14 1949-03-31 Sewing machine Expired - Lifetime US2633092A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CH683294X 1949-01-14

Publications (1)

Publication Number Publication Date
US2633092A true US2633092A (en) 1953-03-31

Family

ID=4528655

Family Applications (1)

Application Number Title Priority Date Filing Date
US84612A Expired - Lifetime US2633092A (en) 1949-01-14 1949-03-31 Sewing machine

Country Status (7)

Country Link
US (1) US2633092A (it)
BE (1) BE492521A (it)
CH (1) CH279598A (it)
DE (1) DE878301C (it)
FR (1) FR1002685A (it)
GB (1) GB683294A (it)
NL (2) NL71930C (it)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2793600A (en) * 1954-03-24 1957-05-28 Marque Usine Sewing machine
US3420200A (en) * 1966-02-03 1969-01-07 Singer Co Modular sewing machines
US3476067A (en) * 1966-02-03 1969-11-04 Singer Co Sewing machines with needle and loop taker operable not in predictably timed relationship
US5067423A (en) * 1990-06-06 1991-11-26 Thompson Elmer R Sewing machine drive assembly, including pulley belt traction enhancement device

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US572538A (en) * 1896-12-08 Sewing-machine
US842934A (en) * 1905-07-10 1907-02-05 James Bolton Sewing-machine.

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US572538A (en) * 1896-12-08 Sewing-machine
US842934A (en) * 1905-07-10 1907-02-05 James Bolton Sewing-machine.

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2793600A (en) * 1954-03-24 1957-05-28 Marque Usine Sewing machine
US3420200A (en) * 1966-02-03 1969-01-07 Singer Co Modular sewing machines
US3476067A (en) * 1966-02-03 1969-11-04 Singer Co Sewing machines with needle and loop taker operable not in predictably timed relationship
US5067423A (en) * 1990-06-06 1991-11-26 Thompson Elmer R Sewing machine drive assembly, including pulley belt traction enhancement device

Also Published As

Publication number Publication date
NL145255B (nl)
BE492521A (it)
NL71930C (it)
CH279598A (fr) 1951-12-15
FR1002685A (fr) 1952-03-10
GB683294A (en) 1952-11-26
DE878301C (de) 1953-06-01

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