US550760A - Welt-guiding device for sewing-machines - Google Patents

Description

. V 5 b 2 SheeltsQSheet 1.

P. w. MERRIGK. WELT GUIDING DEVICE FOR SEWING MACHINES. 7

(No Model.)

No. 550,750. P5551155 1D55;3',1s95.

(No Model.)

2 Sheets-Shea; 2. 1". W. MERRICK. WELT GUIDING. DE VIGE FOR SEWING MAGHINBS. N0. 550,760.

Patented Dec. 3, 1895.

AN DREW EGRAHAM PHMQQ-UTNO. WASHINGTUNJIC.

UNIT STATES.

? PATENT OFFICE.

FRANK 1V. MERRICK, OF BOSTON, MASSACHUSETTS.

WELT-GUIDING DEVICEFOR SEWING-MACHINES.

SPECIFICATION forming part of Letters Patent No. 550,760, dated December 3, 1895. Application filed March 9, 1894. Serial No. 503,007- (No model.)

To all whom it may concern.-

Be it known that I, FRANK W. MERRIOK, a citizen of the United States, residing at Boston, in the county of Suffolk and State of Massachusetts, have invented certain new and useful Improvements in Sewing-Machines, of which the following is a specification, reference being had therein to the accompanying drawings.

My invention is particularly designed for use in connection with sewing-machines which are employed forsewing seams containing a welt. It is customary in making such seams to employ a welt which is prepared in the form of a continuous strip-that is to say, of some considerable length-and after two pieces of material intended to constitute parts of a boot or shoe or the like have been passed through the machine and united thereby with the welt between them it is usual to success ively pass through and similarly unite other pieces of material, the successive pieces be ing connected together by the intermediate portions of the we1ting-strip, which are subsequently severed. When one of the said intermediate portions of the welting-strip is presented to the stitching devices, it, being flexible and yielding, becomes forced into the usual elongated hole or slot in the throat plate by the action of the said stitching devices, and it frequently happens that the strip becomes packed and jammed into the said slot so tightly that it has to be driven out by a suitable tool.

My invention has for its object to remedy this disadvantage; and it consists, accordin gly, in a throat-plate having the slot therein of the improved character hereinafter specified, and whereby the withdrawal of the welting-strip therefrom is facilitated and jamming is obviated.

In the drawings, Figure 1 is a view in end elevation of part of a wax-thread sewing-machine having my invention applied thereto. Fig. 2 is a view in plan of the work rest and parts applied thereto. Fig. 3 is a view, detached, of a throat-plate embodying my invention. Fig. 4 is a View showing the usual form of tl1roat-plate.

At 1 is the base of the machine. At 2 is the post thereof. At 3 is the work-rest, consisting of a plate mounted on the upper end of the said post. At 1 is the needle-bar. At 5 is the needle. At 6 is the cast-off bar, at the upper end of which the cast-off is mounted, as 5 5 usual. At '7 is the aWl-bar. At 8 is the awl.

At 9 is the thread-carrier. At 10 is the presserfoot, and at 11 is the scam-guide, which last is held adjustably to the upper surface of the work-rest by screws 12 12, passing through slots 13 13 in the shank of the same. The construction and operation of these parts are or may be as desired or usual.

At 14: is the welt-guide, it being made in one piece and being seamless,hollow, and elliptical in cross-section. It is secured to the free end of a swinging arm 15, which latter at its rear end is mounted pivotallybetween center screws 16 16, passing through lugs 17 17 on a supporting-plate 18, the said supportingplate 18 being secured to the work-rest 3 by means of screws 19 19, passing through slots 20 20, formed in the supporting-plate and being capable ofadjustment, so as to place the free end of the welt-guide in the desired position relatively to the line of feed.

At 21 is the throat-plate, and at 22 is the slot made through the same for the passage of the needle, (to.

Heretofore the slot 22 in the throat-plate has been a simple straight slot of uniform width from end to end thereof, and when the weltstrip has become packed and jammed into the same so as to fill it the necessity has heretofore existed of arresting the machine and driving out the accumulation by means of a suitable punch or tool applied from below.

I form the said slot with an enlargement 221 at the outer end thereof and preferably bevel off the forward side of the enlargement, as in- 0 dicated at 222 in Figs. 2 and 3. As will be obvious, when the work is drawn along in the direction of the feed such portions of the welting strip as may become carried down into the slot 22 will be fed forward by the action of the 9 5 machine readily until they reach the enlargement 221,when they will at once become freed, and then will pass out without difficulty.

The beveled or inclined surface at the outer for the release and discharge of the Welt-strip, IO side of the enlargement facilitate'stlie niovesubstantially as described. ment of the Welt out of the slot as the Work In testimony whereof I affix my signature passes along. ,in presence of tWo Witnesses. 5 I claim as my invention- L The combination with a Weltguide and g FRANK WV. MERRICK.

the stitching devices of a sewing machine, of Witnesses the throat-plate having the slot therein made WM. A. MAOLEOD,

with an enlargement at the outer end thereof CHAS. F. R-ANDADL.

Images