USRE6843E - Improvement in sewing-machines - Google Patents

Description

UNITED STATES PATENT OFFICE.

TEREST TO CHARLES T. BRADLEY AND WILLIAM H. METCALF.

IMPROVEMENT IN SEWING-MACHINES.

Specification forming part of Letters Patent No. 132,326, dated October 15, 1872 reissue No. 6.843. dated a' January 4, 1876; application iled October 28, 1875.

To all whom it may concern:

.Beit known that I, ELIJAH SHAW, of'Milwankee, in the county of Milwaukee and' State of Wsconsin,.have invented certain Improvements in Sewing-Machines, of which the following is-a speciiication:

My invention consists in an arrangement of adjustable awls and' hooked needles, supplied with thread by a double-thread guide, and operatin g in connection with a cord and lapseam guide, to overlap the material and sew parallel lines of stitches. j

Figurefl is4 a perspective view of the machine; Fig. 2, avew vof adj ustable needles and loop-carriage; Fig. 3, a. seetionalview of adjustable needles and loop-carriage; Fig. 4, a

sectional view of the other half of needles and loop-carriage. Fig. 5 is a view of the awl-bar, with adjustable awl-fasteniiigs. Fig. 6 is a view of the awl-bar; Fig. 7, the adjustable thread-carrier; Fig. 8, the adjustable foot; Fig. 9, half of needle-plate; Fig. 10, other halt' of needle-plate; Fig. 11, lap-seam and cord gage- A is the frame of the machine. B is the balance-wheel. U is the crank. D is the needle and looper arm. E is the awl-arm; F, the thread-spool; Gr, tensionrollers; H, threadguides; I, tension-springs; K, threadcarrier bar; L, thread-carrier; M, the awls; N, needles; O, lap-seam and cordgage; P, end gage; Q and R, needle-plates; S, adjustable foot; T, set-screws, which hold adjustable needle-carriage in place. U U are cast-olfs; V, adjustable aWLhOlder;v W, adjustable collar on awlybar, which performs the function of holding the awl -bar higher or lower, as it maybe placed, and also for holding it so that thev awls shall be in line with and exactly over the needles N; XX, guide-pins to the cast-od' and needle-bars; Y, screw for adjusting the nee dles and cast-ois the vproper distance apart; Z, a screw for attaching the needle and looper-carringe to the feed-bar; a, setscrew to adjust the threadcarrier the proper height; b, set-screw for setting awls in the holder; 0, setscrew for adjusting movable awl-holder; d, set-screw .to adjust the foot to the proper width; e, needle-bar; f, set-screw to hold awl in awl-bar; g, set-screw for setting lap-seam gage; h h, slides for adjusting needle-boards;

it', slots in needle-board for the needles and awls to pass through; 7c, slots in which the slides h move; m m, set-screws for fasteningl castos in their sockets; n, screws for adjusting cast-Oife to the needles; o, set-screws for' setting needles inthe needle-bars; pp, screws which hold a dovetail piece between needles and cast-olbars to hold them in their places; q, a set-serenir which holds foot in bar; r, holes for guide-pins X X; t, loop and needle carnage.

The operation ofmy invention is as follows: By turning the crank the cams give motion to different parts of the machine. The awls pass down and pierce'the holes in the leather, the thread being properly adjusted in the thread-carrier. When the needles have passed up to the proper height the thread-carrier will throw the thread over the barbs of the needles, the needles then passing down until the points come even with the points of the cast` otl's. Then they and the needles pass down together until they get a proper distance below the needle-board to form theloop. These needles, awls, and cast-offs operate upon the thread in thev usualY manner. The gage is adjusted to lap the material the proper width, the edge of the material placed in the slots of the-guide, anda cord or other filling may or may not lill the hole in the guide. Themachine may then be started, a'nd lthe boot-leg or other article will be sewed by two seams, with edges overlapped and raised between the same.,

I claim as my invention- 1. The double-thread carrier, the double presseufoot, the two awls, two needles, and two cast-ods, in combination with a lap-seam gage, all constructed and operating'substantial-1y as set forth.

2. The combination of collar lW, awl-bar, and adjustable awl-holder V, substantially as set forth.l j

3. The combination of adjustable needleboard, adjustable presser-foot, adjustable awlholder, and adjustable needle-carriage, substantially as described.

ELIJAH SHAW.

Witnesses J. LB. SMITH, A.' SGHATTENSBERG.

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