US1697984A - Glove-sewing machine - Google Patents

Description

o 1 I i Jan. 3; 1929. 7 1,697,984

H. J. LE VESCONTE GLOVE SEWING MACHINE Filed June 11, 1925 4 Sheets-Sheet l RWW Jan. 8, 1929.

1,697,984 H.J.LE VESCONTE GLOVE SEWING MACHINE Filed June 11, 1925 4 Sheets-Sheet 2 gwomfoz abbozmq Jan. 8, 1929. 1,697,984

H. J. LE VESCONTE GLOVE SEWING MACHINE Filed June 11, 1925 4 Sheets-Sheet 5 gin vented,

Jan. s,- 1929.

H. J. LE VESCONTE x zgiw Patented Jan. 8, i929,

HAROLD J. LE VESCONTE, OF CHICAGO, ILLINOIS, ASSIGNOR TO UIIION"SPECIAIII MA CHINE GOMPANY, OF CHICAGO, ILLIEIOIS, A CORPORATION OF ILLINOISJ.

enovn-snwrne MACHINE.

Application filed June 11, 1925. Serial No. 36,391.

mechanism and a presser foot, with-means for raising the presser foot from'the mate rial, while the needle is still is the material and before the feed takes place, so that the material may'be swung on the needle as a.

pivot to aidvin the directing of the material. in a sharp curved path. 1

A further object of the invention is to provide a sewing machine having a clamp feed with a presser foot lifting mechanism of the above type, wherein the footis raised when the upper feed dog is lifted from the materialwhile the needle is still in the material, so as to completely relieve the material, whereby it may be swung on the needle as a pivot to aid in stitching around sharp curves. 7

These and other objects will in part be obvious and will in part be hereinafter more fully disclosed.

In the drawings which show byway of illustration one embodiment of the invention Figure 1 is a rearview of a sewing machine embodying my improvements;

Fig. 2 is a View partly in section and partly in end elevation from the needle endof the sewing machine;

Fig. 3 is a front view of a portion of the machine, the work support being removed;

Fig. 4 is an enlarged detailview showing the upper feed dog andfoot raisedso that and showing the preferred form of edge.

the material may be swung onthe needle as a pivot. and

Fig. 5 is a plan view of the work support and the parts immediately above thesame,

guide used in connection with my machine.

The invention is directed broadly'to a sew preferably in the form of aclamp feed, that is, including an upper and a lower feed dog,

which engage the material simultaneously and move it a stitch length. This renders the machine especially adapted for operating. The machine is also provided:

upon leather. with a presser foot which cooperates with the feeding mechanism and the needle in the manipulation of the material and theholding of the material for'the forming of the stitches.

In addition, the machine includes an auto 7 matic means for raisingthe presser footslightly from the material at a timewhen' the upper feed is lifted a slight distance from the material, and whilethe needle'is still :inw

the material, so that the material may be sewing of gloves and the tippingof thefinbed plate 1 carrying a work support 2, also a standard 3, havingianoverhanging: arm 4.

.gers where the lineof stitches following around the finger tip must be laid ina very,

- sharply curved line. 7

Referring more in detail to the drawings, my improved machine includes an ordinary- Mounted to reciprocate in this overhanging arm 4: is a needle bar 5 carrying a=single 'needle-6. The needle bar is reciprocated by means ofa needle lever-7 which is connected to the needlebarby a link Cooperating, Ywith the needle 6 beneath the work support isa thread carrying looper 9 whichis pivotally carried by a looper rocker 10,1and. which is oscillated by means'of' a link-r11; The r looper rocker is alsomoved soas to give to the looper'a needle'avoidin g movement, while thelink 11 oscillates the looperinto and-out of the needle thread loop.. The :material is fed across the work support thelvfeedi ng -r mechanism which includes a lower feed dogj 12 and anupper :feeddog 13. The lower feed dog 12 is carried by-a feedbar .14 pivoted to i a feed rocker 15 from which the feedbari-is moved back and forth, and. thus a ifeedi'ng movement imparted to the feed dog.12.l Thefeed bar is raised and lowered bytheusuall eccentric 16 carriedbylthe main shaft 17 (see.

Fig. The upper feed dog13 is mounted on a bracket 18; Alongside of the feed bar His an'auxiliary feed bar 19.,( 'e Fig, 3), which auxiliaryfeed baris pivotedftothev same feed rocker zas the main 'feedibar 14 and is moved back and .forth by the feed. rocker 15. The bracket .18 is secured-to this .auxil-f iary feed bar 19bymeans of screw-s 20.- The. shank 13 of the upper feed dog extends. .b ew I neath the cloth plate and is secured to this bracket. 18 by means of a screw 21 which passes through a slot 22 in the shank 13.-

This auxiliary feed 'bar 19 is raised and lowered by an eccentric 23 on the main shaft 17 This eccentric 23 is so set relative to the eccentric 16, that the upper feed bar is raised, lifting the upper feed dog from the material when the lower feed dog islowered from engagement with the material. Likewise, when the lower feed dog is'raised into engagement with the material, the upper feed dog is lowered so as to clamp the material, and while the material is clamped by the two feed dogs, it is moved a stitch length.

The above-described feeding mechanism is shown in detail in the patent to 'lVoodward #591,517, granted October 12, 1897-, and a more detail description is not thought necessary. It is only essential to the present invention,'in that it is representative of a clamp feed which is especially useful when operating upon leather material. a

The material is held on the work support by a presser foot 24 carried by a presser bar a usual guide bar 25 is also mounted in the head and connected to the main presser bar 25 by the arm 28. Whenever the presser foot israised, this guide bar 25 is also raised therewith. On the lower end of the guide bar 25 is a bracket 29 whichis L-shaped, and the lower member thereof extends underneath the lug 3O attachedto the shank of the upper feed dog. The purpose of this angle bracket 29 is for lifting the upper feed dog if it is on the material when the presser foot is raised by means of'the foot controlled lever 31.- The auxiliary feed bar 19 is spring pressed on to the eccentric 23 and can be lifted therefrom so as to permit the upper feed dog to be raised. This occurs only when it is de sired to place the material between the feed dogs or remove the material that is clamped by the feed dogs.

At the back of the machine, there is a cross shaft 32 mounted in suitable lugs 33, 33. This cross shaft is provided-with a forwardly projecting arm 34 on the forward end thereof. This arm 34' extends underneath the collar 35 fixed to the main presser bar 25. Also secured to the cross shaft 32 is an arm 36. This arm has an arc-shaped slot 37 formed therein in which is adjustably mounted a stud 38. On the main shaft 17 there is an eccentric 39. An eccentric strap 40 cooperates with this eccentric 39'and a link 41 is rigidly connected to the eccentric strap. It is also connected to the stud 38 so that as the main shaft rotates, the link 41 will causethe cross shaft 32 to oscillate, and the extent of oscillation imparted to the shaft depends upon the adjustment ofthe stud 38. When the cross shaft 32 is oscillated, it will swing the arm 34, and this will raise the main presser bar and the main presser foot 24 from the material. It is understood, of course, that this mainpresser bar'is located at one side of the top feed as clearly shown in Fig. 3 of the drawings. It does not cooperate with the lower feed, but does hold the material on the work supportso'as to insure the material being stripped from the needle, and also holds the material.

clamped against the work support at the time the stitch is bein set. The eccentric for lifting the presser foot is so timed that the foot is lifted from the work support and the ma terial when the upper feed dogis descending to clamp the material for feeding it, andwhen the needle is on its up stroke. There is a. time,

therefore, when the presser foot is lifted from the material, the upper feed dog is also raised from the material, and the needle is in the material on its up stroke. At this time. the op- 1 erator may quickly swing the material on the needle as a pivot, and thus cause a. very sharp V turn to be made of the material. The material is entirely free of any clamping action of either the foot or the feed dogs at thistime when the needle is in it, so that it can be turned freely thereon. Associated with this presser foot is an edge guiding device which I is shownin detail in Fig. 5 of the drawings. This edge guiding device has a head 42 which is located directly opposite to the needle 6. This head bears against the side face of the presser foot 24. Said head is carried by a rod 43 mounted in a bracket 44, and a spring 5 45 yieldingly forces the rod to the left as viewed in Fig. 5, and against the presser foot-.-

The rod may be retracted by means of a lever 46. The head is just above the face of the cloth plate, and therefore, the'edge of the materialas it is being stitched willbe guided by said head. This insures that the line of stitching shall be properly spaced from the edge of the material. The head has a rounded face as clearly shown in Fig. 5, which enables the material to be turned for stitching in acurved path.

By the use of the edge guide shaped and positioned as above noted, the article operated upon may be turned in a relatively sharp curve, and at the same time, the line of stitches which are being formed, maintained at a predetermined distance from the edge of the fabric. This machine is especially adapted for tipping the fingers of gloves and the like, where it is essential that. the line of stitches shall be a. uniformed predetermined distance from the edge of the leather.

It is obviousthat other ways of raising the presser foot when the upper feed is free from the material and while the needle is in the eezesa material, may be utilized, without departing vfrom 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 e 1. A sewing machine including in combination, a work support, a needle bar carrying a single needle, means for reciprocating said needle bar, complemental stitch forming mechanism cooperating therewith, a feeding mechanism including an upper feed dog for feeding the material, a presser foot, and

means independent of the feeding mechanism and the needle bar reciprocating means for automatically lifting the presser foot when the upper feed dog is free from the material and while the needle is still in the material, so that the material may be swung about the needle as a pivot.

2. A sewing machine including in combination, a work support, a needle bar, means for reciprocating said needle bar, a single needle carried thereby, complemental stitch forming mechanism cooperating therewith, a feeding mechanism including a lower feed dog and an upper feed dog cooperating to clamp and feed the work, a presser foot alongside of said upper feed dog and having a throat through which the needle passes, automatic means independent of the feeding mechainsm and needle bar reciprocating means for raising the presser foot when the upper feed dog is free from the material and while the needle is still in the material whereby said material may be turned on the needle as a pivot to direct the line of stitching 1a a sharply neath the work support, an eccentric on said main shaft, and devices actuated by said eccentric for automatically raising the presser foot when the feed dog is free from the material and while the needle is in the material to aid in the forming of the line of stitching in a sharply curved path.

4. A sewing machine including in combination, a Work support, a reciprocating needle bar carrying the needle, a feeding mechanism including an upper and a lower feed dog for clamping and feeding the material, a presser foot, means for automatically raising the presser foot when the upper feed dog is moved downwardly to engage the material and before the feeding action takes place, and while the needle is still in the material, so that said material may turn on the needle as a pivot to direct the feed in a sharply curved path, and a yielding edge guide located alongside of the presser foot close to the needle for guiding the edge of the material, said edge guide having its surface engaging the material sharply curved so as to properly guide the edge of the material as the material travels in a sharply curved path. 1

In testimony whereof, I aflix my signature.

HAROLD J. LE VESGONTE,

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