US1421797A - Presser-foot attachment for sewing machines - Google Patents

Description

E. J. MALONEY.

PRESSER FOOT ATTACHMENT FOR SEWING MACHINES.

APPLICATiON FILED DEC. 6, 1920.

1 ,4 1 ,797, Patented July 4, 1922.

UNITED STATES PATENT OFFICE.

EDWARD J". MALONEY, OF LONG ISLAND CITY, NEW YORK, ASSIGNOR TO ANDREW WOLF, OF NEW YORK, N.

PRESSER-FOOT ATTACHMENT FOE. SEWING MACHINES.

Application filed December 6, 1920.

To all whom it may concern:

Be it known that I, EDWARD J. MALONEY, a citizen of the United States of America, residing at Long Island City, in the county of Queens and State of New York, have invented certain new and useful Improvements in Presser-Foot Attachments for Sewing Machines, of which the following is a specification.

The present invention relates to a presser foot attachment for sewing machines, particularly of the class known as concealed stitch straw sewing machines.

In machines of this character it has hitherto been necessary to provide a different presser foot and work guide for each class of braid. Likewise braid of different thicknesses requires special combination foot and guide so that the work may be properly held and guided. Hence with the old machines many different kinds of comparatively expensive presser feet and guides are required.

The object of my invention is to greatly reduce the variety of presser feet and work guidesby providing a construction in which the presser foot and work guide are made of separate parts and adjustable so that various thicknesses, widths and shapes of braids can be treated.

Another important object of my invention is to so construct the device that the work guide and presser foot can be adjusted independently from each other, to thereby prevent the crushing of delicate beads or edges.

With my invention three sizes of presser feet and work guides will accommodate all possible styles, widths and thicknesses of braid. While the smaller size will guide the larger braid satisfactorily, I provide the largest sizes with the particular object of in creasing the wearing surface.

The construction of the sewing machine to which my invention is designed to be applied, is well known and I shall show and describe only so much of the machine as is necessary for the understanding ofthe manner of attachment and operation of my invention.

In the accompanying drawing in which similar reference characters denote corresponding parts, Fig. 1 is a top plan view of Specification of Letters Patent.

Serial No. 428,432.

front end elevation thereof; Fig. 3 is a section on line 3-3 of Fig. 1; Fig. 4 is a section on line H of Fig. 1; and Fig. 5 is a top plan view of the work guide.

Referring tothe drawing more in detail, 10 denotes the supporting arm for the presser foot attachment, which arm is a part of the sewing machine, of well known con struction and which extends above the throat plate'll. The pressser foot attachment con sists of two separate parts, namely, the work guide 12 and the presser foot 13, each made in the usual shape, as shown in the drawing, the surface 12 of the work guide serving as pressure surface and the forwardly projecting extension 12 as work support. The upper face of the work guide is provided with a rib or gib 12 having a central threaded bore 12 This gib 12 is adapted to slidably engage a longitudinally extending groove 10 provided in the underface of the arm 10 so that the work guide 12 can be adjusted in horizontal direction. Rotatively borne on the upper face of the arm 10 is a lever 14 Patented July 4., 1922. j

having at one end a knob or handle 15 and at its opposite end a downwardly projecting stud 16 engaging a cross slot 10 in the arm 10 and serving as fulcrum. A binding screw 17 freely passing through a perforation 1-1 in the lever 14 is screwed into the threaded bore 12* of the work guide 12. By means of said screw bolt 17 the work guide can be drawn to be in contact with the underside of the arm 10. Between a collar 17 of the screw and the lever 14 I provide a spring washer 18 whereby the lever 14 is held in frictional contact with the upper face of the arm 10.

The horizontal adjustment of the work guide is obtainedby the turning of the lever 14:, in consequence of which the hindingscrew shifts the work guide along the arm 10 whileits stud 16 acting as fulcrum slides in the recess 10 To accommodate the high points of coarse braids a clearance 20 is provided between the surface 12 and the pressure surface 12' of the work guide as clearly shown in Fig. 3.

The presser foot 13 provided with the stitch hole 13' is adapted to be adjustably supported on the arm 10 in front of the work guide 12. To this end it is provided with a neck portion 13 formed with a threaded bore 13 in which works a vertical adjusting screw 21. The latter is provided with two superposed collars 22 22 which bear on the upper and lower faces of the arm 10 around the hole 10 through which the screw bolt 21 loosely passes into the presser foot 13. On each side of the neck 13- a vertical guide pin 23 is provided which is screwed into or otherwise fixed in the presser foot. These pins 23 are adapted to project through and slidably bear in guide holes 2t provided in the arm 10. By turning the screw 2i in one or the other direction the presser foot will be adjusted vertically to fit different thicknesses of braid.

The finished work 26 is held under the presser foot 13 while the braid 27 to be attached is held under the pressure face 12 or the work guide 12, with one of its edges below the adjoining edge of the work so that the needle (not shown) during the operation of the machine passing through the stitch hole 13 will form the stitch 28.

\Vhat I claim and desire to secure by Letters Patent is:

1. In a presser foot attachment for sewing machines, the combination with a supporting arm, 01 a presser toot, a screw bolt rotatively supported in said arm so as to be held against relative upward movement and working in said foot and guide pins for guid ing said foot vertically.

2. In a sewing machine the combination with a stationary arm, of a vertically adjustable presser loot having a threaded bore, a vertical screw bolt rotatively supported in said arm but held against relative vertical movement, said bolt working in said bore and lateral guide members tor said presser foot.

In testimony whereof I allix my signature in presence o'l two witnesses.

EDWARD J. MALON EY.

Witnesses Goes MoN'rRosE, MAX Rosn.

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