US1289314A

US1289314A - Inseam sewing-machine.

Info

Publication number: US1289314A
Application number: US16388017A
Authority: US
Inventors: Laurence E Topham
Original assignee: United Shoe Machinery Corp
Current assignee: United Shoe Machinery Corp
Priority date: 1917-04-23
Filing date: 1917-04-23
Publication date: 1918-12-31
Anticipated expiration: 1935-12-31

Description

L. E. TOPHAM.

,INSEAM SEWING MACHINE.

APPLICATION map APR. 23, um.

Patented Dec. 31, 1918.

4 SHEETS-SHEET I.

Patenbed Dec. 31, 1918.

4 SHEET3-SHEET 2 .1 EM I ML MAR. MP A m OWE T IrE ES Mw .L A m NI. l-Dl DI L. E. TOPHAM.

INSEAM SEWING MACHINE.

APPLICATION FILED APRJZIL 1917 1,289,314. Patented Dec. 31, 1918.

4 SHEETS-SHEET 3'.

11872122? M c? W/ L. E. TOPHAM.

INSEAM SEWING MACHINE.

APPLICATION FILED APR.23, 1911.

Patented Dec. 31, 1918.

4 SHEETS-SHEET 4.

LAURENCE TOPHAM, OF SXK AIMPSCOTT,

MASSACHUSETTS, ASSIGNOR, BY IVZESNE ASSIGIDIMENTS, T0 UNITED SHOE MACHINERY CORPORATION, 6F PATERSON', NEW JERSEY, A CORPOEATIOI-l' OF NEW JERSEY.

l INSEAM SElFJING-MACHINE.

Application filed April 23.

To all whom it may concern.

Be it known that I. LAURENCE E. TOPHAM, a citizen of the United States, residing at Swampscott, in the county of Essex and State of Massachusetts, have invented cer tain new and useful Improvements in Inseam Sewing-lllachines; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

The invention relates to inseam shoe sewing machines such as are used for sewing the uppers to the soles of turn shoes, or the welts and uppers to the insoles of welt shoes.

In machines of this type as heretofore constructed the feed of the work has been inter- Inittent, and consequently has involved starting and stopping the work during each stitch forming; cycle. These machines usually operate upon lasted shoes, and the inertia 0f the comparative y heavy last and shoe which must be overcome at the beginning and end of each feeding movement limits the speed of operation, and subjects the feeding devices and the work to objectionable strains which are liable to injure the between substance and to cause inaccuracies or variations in the lengths of the stitches. The rapidly recurrent intermittent feed also renders it diflicult for the operator to properly hold and guide the work, particularly in operating about the toe or at points where the contour of the shoe changes rapidly.

It is the object of the present invention to eliminate these objectionable features, thus )ermitting the speed of operation to be increased, and also permitting the work to be more easily and accurately guided, and with less care and exertion on the part of the operator. To this end the invention. contemplates smmounting and actuating: some or all of the work engaging devices of the stitch forming and work guiding mechanism that the worlr is advanced or fed contin ously during the sewing. thus eliminating the objectionable strains and inaccuracies incident to startinn' and stoppingthe work dur ng each stitch forming cycle, and permitting the speed of the machine tohe increased, and also facilitating the proper guiding and manipulation of the shoe by the operator. The specific form'of the parts. and the man Specification of Letters Patent.

Patented Dec. 31, 1.918..

1917. Serial No. 183,880.

nor of mounting and relatively actuating them to continuously feed the work is not ma terial to the broader scope of the invention. In embodying the invention in inseam sewin; machines in which the channel guide re ciprocatcs in the lineof feed, either with or without a feed point or awl, it is preferred to mount the needle and hack-gage to reciprocate together in the line of feed, and to so time the reciprocations that the return movement or back-feed of the needle and hack-gage occurs during the forward feed of the channel guide or channel guide and awl while the back-feed of the latter part or parts occurs while the needle is in the work and is moved forward in the direction of the feed. The back rest with. which machines of this type are usually provided may also be mounted to move in the direction of the feed, and when so mounted, is preferably advanced and returned in unison with the needle.

The invention. will be readily understood from an inspection of the accompanying drawings and the following detailed description of the machine illustrated therein.

In the drawings, Figure 1 is a right-hand side elevation of a welt and turn sewing machine embodying a preferred form of the invention; Fig. 2 is a detail. view on line 2, Fig. 1; Fig. 3 is a detail section on line 3, Fig. 1; Fig. l is a left-handside elevation of the machine; Fig. 5 is a partial front elevation, certain parts being omitted to better show the parts behind them; and Fig. 6 is a detail side elevation illustrating the support for the needle and hack gage.

In the drawings the invention is shown embodied in a welt and turn sewing machine which is similar in general construction to the machine shown and described in Patent No. 1,108,560, August 25, 1914. This machine is provided with a curved hook needle 2, a looper 4, a thread arm 6, and awl 8, a channel guide 10, a hack-gage 12, which, as shown also acts as a welt guide, a back rest 14. a talreup 16, and an auxiliary takeup 18. all of which are similar in construction to the corresponding parts in the machine of the patent, and all of which, with the exception of the needle, haclngage and back rest, are or may be similarly mounted and operated.

Tn the machine of the patent the work engagement of the needle therewith. In the -needle segment in the line of feed.

machine shown the objectionable features of this intermittent feed are eliminated by so mounting and actuating the needle, back-- gage, channel guide and awl, that the advance or feed of the work is continuous during the sewing. To'securc this result the channel guide and awl are mounted one feed slide 20 which has the same construction as the feed slide of the patent, and is reciprocated by a cam lever engaging a pivoted at 62- to a fined supporting braclrt,

feed cam 24 as in the machine of the patenhif The channel guide is secured. upon a lever 26 which is pivoted on the feed slide, and is rocked at proper intervals through a cam lever 28 and rock shaft 30, as in the machine of the patent. The awl is secured in an awl segment 32 pivotally mounted on the feed slide, and connected by a link 34; with a lever 36 also mounted onthe feed slide and rocked at roper intervals by a cam lever 38, as in t' 9 machine of the patent. The needle and back gage (welt guide) are also mounted for reciprocation in the line of feed, and are advanced in the direction of the feed during the back-feed of the feed .slide, and are returned or back fed during the advance of the feed slide. As shown, the needle is secured in a needle segment 40 which is pivotally mounted and guided on a supporting plate 42, and is connected by a link 44 with an actuating cam lever 46. The ends of the link are connected with the cam lever and needle segment by hall joints, to permit the movement of the needle and The back-gage or welt guide 12 is secured upon an arm 48 which is pivoted upon a stud 50 secured in the supporting plate 42. The arm 48 is connected by a link to a hack-gage slide 54' which is operated and locked at proper intervals by mechanism fully 'described in the patent referred to. The link is connected with the back-gage slide and the arm carrying the back-gage by ball joints, to permit the movement of the back-gage in the line of feed. The support 42 for the needle and. back-gage is secured to a rod or stud 58 mounted to slide longitudinally in bearings in the machine frame, and also forming the supporting stud on which the feed slide 20 is mounted. The support 42 is also guided and retained in proper p0silion-by the engagement of the stud-50 with a bearing formed in the bracket 58 Fig. 5);

The mechanism for reciprocating thestnd 56. support 42, and the needle and back-gage carried thereby, comprises a cam lever 60 and provided at its rear end. with a roll 64 engaging the feed cam 24. The .lever is connected to the rod 56 by a pivot stud 66 which is adjustably secured in a slot 68 .in the lever and engages a pivot block '(0 which fits within a transverse slot in a block 72 formed on the end of the rod. By adjusting the stud 66 the movement of the needle and backgage in the line of feed may be varied in accordance with the length of stitch to be sewed, and in accordance with the adjustmentof the mechanism for reciprocating the feed slide 20.

In the construction shown the back rest is mounted for movement back and forth in the line of feed. As shown, theback rest is secured on the forward end of a lever 74 which is pivotally supported on the for aid end of the back rest slide 2 6, and is connected at its rear end to a link 78, the other end of which is connected to an actuating lever 80. The lever 86 is rocked to reciprocate the back rest. in the line of feed through a pivot block 82 which is mounted on the block 72 atthe end or? the rod 56, and tits within a slot formed in the upper end of the lever. Through these connections the movement of the rc'd 56 re iprocates the back rest in unison with the" needle and back gage. Tn doing certain classes of work, at least, it has been found desirable to retain the back rest when operating on shoes in which there are rapid changes in the contour of the last along the line engaged bythe back rest has a tendency to knock or displace the shoe.

The mode of operation and timin parts is as follows. During the Iorward stroke of the needlejthrough the work the needle, the back gage, the awl and the channel guide are all moving in the direction of.

the feed. After the ncedle'has completed its forward stroke, and while the looper and thread arm are acting, the channel guide is withdrawn and the channel guide and awl are back fed. They complete tneir back feed,

start forward. in the direction or the-feed,

and ree'ngage the work ust belore the needle clears the work on its back stroke. Immediately after the needle finishes its back stroke,

otthcv the back gage is lifted away from the work,-

and the backjeed of the needle and back gage takes place. At the end of the back the feed, and the back gage engages the work and is locked just before the needle reaches It will be feed at all times during each cycle; and that '12 feed they start forward in the direction of the back feed of each element takes place while one or more of the other elements is work,- and in the opposite direction while withdrawn from the work, and mechanism for actuating oneor more of the other work engaging devices of the stitch forming and work guiding mechanism to continue the feed. while the needle is out of the work.

14. A11 inseam sewingmachine, having, in combination. stitch forming and work guiding mechanism including a needle and channel guide, mechanism for moving the needlein the direction of the feed while in the work, and in the opposite direction While withdrawn from the work, and mechanism for moving one or more of the other work engaging devices of the stitch forming and.

work guiding mechanism in the direction of the feed while the needle is out of the Work.

15. An inseam sewing machine, having, in combination, a needle, channel guide and back gage, one or more of which is in active engagement with the work throughout the sewing, and mechanismv for moving eachin the direction of the feed when in active engagement with the work.

LAURENCE E. TQPHAM.