US1314820A - Attachment foe - Google Patents

Description

C. LOMBARDI AND J. MARCUS.

BLINDSTITCHING AITACHMENT FOR SEWING MACHINES.

APPLICATION nusn JULY 5.1911.

1,3 1 4,820. Patented Sept. 2, 1919. I

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UNITED STATES PATENT OFFICE.

CYRUS LOMBARDI, or CONEY ISLAND, AND JACOB MARCUSLOF nAsT NEW YORK, N. Y.

BLINDS'IITCHIN G ATTACHMENT FOR SEWING-MACHINES.

To all whom it may concern Be it known that we, CYRUs LOMBARDI and Jason MARCUS, subject of. the King of j chines, of which'the following is a'full, clear,

concise, and exact description.

Our invention relates to an attachment for sewing machines, and particularly to a mechanism. for sewing a blind stitch.

The object of the invention is to provide such a mechanism that may be readily attached to the presser-foot bar of a sewing machine, and be adjustedthereon to perform .allthe functions relating .tothe guiding. of the. material to be sewed in a simple and eXpeditious manner, and without the aid of any guide plates or attachments on the bed plate of the machine.

.The invention consists in general of a presser-foot provided with guide flanges, which may be manipulated and adjusted thereon so that a variety of thicknesses of material may be-sewed, and so that the needle may. penetrate, the upper layer of the mate rial to any desired depth. 1

In the accompanying drawing, Figure 1 isa perspectiveview of the mechanism as attached; to the presser-foot bar; Fig. 2 is a cross-section of the mechanism taken on line 22 of Fig. 1:; and Fig. 3 is, a fragmentary front view of the mechanism taken on the line 3-3 of Fig. 1, showing in cross-section two layers of the material to be sewed together.

Referring to Fig. 1 the presser-foot 1 is attached to the presser-foot bar 2 of an ordinary sewinghmachine. This presser-foot consists of the body portion 3 and the foot or flange 4, linked at 5 so as to press against the material in slightly yielding fashion.

. Mounted on presser-foot 1 is a guide block 6,

by means of the projecting shanks 7 and 7 thereof engaging grooves 8 and 8 on the foot 1. This guide block 6 is adjustable in a horizontal direction by means of the screw 9, rotatably fastened on presser-foot 1 by plate 10 and entering into the body of the block 6. The block 6 may be permanently fixed in any desired relation to presserfoot 1 by the screw 12, which clamps the two Specification of Letters Patent.

Applicatiofi filed July 5, 1917.

Patented Sept. 2,1919.

SeriaLNo 178,608.

parts together, by being screwed into the body portion 3 of the presser-foot 1, and by having the head thereof with the washer 13 overlapping the edge of the projectingshank 7 in whicha slot 14: is cut to limit the extent to which the block .6 may be moved away from. presser-foot 1. V

Yieldingly mountedon the block :6 is a guide-member 16, by means of the shank 17 entering into a slot 18 onthe block .6 and by having a slot 19 cut therein through which a a pin.20, fixed on block- 6, is passed. A spring 21 is inserted in a vertical hole 22 in the guide member 16 between the pin 20 and the bottom of hole-22,to hold the guide member 16 in a downward position. This member 16 has .a forward projecting foot or flange 23 lyingparallel withbut 1n a plane at right angle to the foot or flange 4. The cover plate 25, fixed on theside of the guide blockl6, is provided with a slot ,(not shown) through which the stud 27 is passed and held in the shank 17 of guide member 16. This stud 27 maybe used by the operator to lift the guide member 16 ina verticaldirection. Mounted fixedly on the guide-member 16 is the mounting block 29, by means of screw 30 and dowel pin 31. (See Fig.1). The guide flange or foot 32 whiohlies parallel with flange 23 is provided with a rightangle round-projectingpin 33 thatenters in hole 34 in block: 29. The flange32 is movable in a horizontal direction by movement of the pin 33 horizontally in the hole 34 and vertically by rotation. of the pin 33. in the hole 34:, the flange 32 being by this means adjustable in a horizontal and vertical relation to thefiange 23. The flange 32 may be fixed permanently in block 29 by means of the screw 35.

The operation of the mechanism is as follows: The presser-foot l is lowered in the usual manner and [the material is placed onthe bed plate 36 with the edge of the under-layer 37 the desired distance to the right from the presser-foot 1. This dis tance is determined by flange 32 which may be shifted to the right or left, depending on thewidth ofthe over-lapping edge desired on the under layer 37 in relation to the upper layer 41. This flange 32 may also be pressed down against the bed-plate 36 so as to insure agood firm guide a ainst sirable not to use this guide 32, and the block .29 may then be entirely removed from guide member 16 by unscrewing the mounting screw 30. Then againitmay be desirable to only temporarily dispense with the.

use vof the guide 32, and it may then be turned out of the way of the under layer 37 by rotating it with the knob "40 and clamping it in such a position by screw 35. v

The upper layer 41 that is to be blindstitched to'the under-layer 37 on the table is folded and passed underneath the presserfoot withthe fold pressed against the verti'cal guide plate 23, which has been adjusted in a horizontal direction'away from the flange 4, according to the depth that it is 'desiredto have the blind stitch penetrate the upperjfolded layer 41. The guide plate 23 of guide member 16 yieldingly adjusts itself in a vertical direction, in accordance with thejthiclrness of the under layer 37,

and presses this layer tightly against the bed plate 36. The machine is now set in moti'onfand' the two layers of-material are in position to be stitched together by being passed" forward by the operator and guided by the flanges 4, 23- and 32. During the stitching the flanges 4 and 23 first engage the fold in the upper layer 41 loosely as it is'fedby-the'operator, and later, press it more tightlytogether, and the needle will therefore penetrate the upper layer 41 at e'x'actlythe right distance from the edge of the foldand the flange'32 will guide the under layer-"37 softhat the upper layer 41 Willbe Stitched to the under layer 37 at exactly the right position.

" Alt'hough we'have-described a particular form of our invention, it may be constructed 'ini a variety of manners without departing 'from 'its 'scope, and itis therefore limited only by the'appended claims. p v v What is claimed is: i

" 1. In combination with a presser-foot bar of a sewing machine, a presser-foot mounted thereon, a horizontal flange yieldingly secured "to said presser-foot, a'vertical flange adjustable in a horizontal and yielding in a vert cal direction in relation to the horizontal flange, means for permanently fixing Copies of this patent may be obtained for of a sewing machine, of a' presser-foot mounted- 'tliere on, a horizontal, flange see cured to said presser-foot adapted to yield; ingly press together thematerials to jbe stitched, a vertical flange against which the fold in the upper layerof thematerial is. placed, amounting block for said vertical flange mounted on the resser-foot, a spring for pressingsaid vertical flange against the under 'layerof the material, a screw for moving said'mounting-block" to adjustthe vertical flange' in a'horizontal relation to Y 'thehorizonta'l flange, a screwfor permanently clampin'gflsaid mounting block to said presser-foot, a second'vertical flange against which the edge-of the under-layer of material is. placed, a mounting block for said second vertical flange mounted on said first mentioned vertical fiange, and a screw for perr'nanently clamping said second flangeion,

said block in any desired relation to the first vertical flange;

3. In combination with-a presser-foot bar of a; sewing machine, 015 a 'presser foot mounted thereon, a horizontal flangeyieldingly-secured to said presserefoot shaped so I as to press thefo'ld of the upper lay'erfof the material to be stitched tightly at the point where the needle penetrates the edge of the fold,-aguiding means mounted on the presser-foot, adjustable in relation to "the horizontal flange horizontally and verti 1 cally, means for-'securing'said guiding means if in a fixed horizontal relationto the horizontal' flange and in' a yielding vertical relation to the under layer ofthe material, and guiding means mounted on said first-mentioned guiding means adjustable in relation. i thereto horizontally and vertically. V d

In witness whereof, we hereunto" subscribe cinemas this 27 day of J unefA. D., 191. I

CYRUS LOMBARDI." JACOB MARCUS. I

five cents each, by addressing the Commissioner of Patents, Washington, D. 0.

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