US512014A - Walter graham - Google Patents

Description

' (No Model.)

H. A. DODGE, WIG. TILLOU & W. T. RICHARDS. PRESSER FOOT MECHANISM FOR SEWING MACHINES.

No. 542,014. Patented Jan. 2, 1894 u II III .N

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UNITED STATES ATENT Fries.

HENRY ALVIN DODGE, OF BOSTON, MASSACHUSETTS, WALTER GRAI-IAM TILLOU, OF NEW HAVEN, CONNECTICUT, AND WVILLIAM THOMPSON RICHARDS, OF NEIVTON, MASSACHUSETTS, ASSIGNORS TO THE BOS- XVORTI-I MACHINE COMPANY, OF MILFORD, CONNECTICUT.

PRESSER-FOOT MECHANISM FOR SEWlNG-MACHINES.

SPECIFICATION forming part of Letters Patent No. 512,014, dated January 2, 1894.

Application filed August 16, 1893- Serial No. 483,238. (No model.)

To all whom it may concern Be it known that we, HENRY ALVIN DODGE, of Boston, in the county of Suffolk and State of Massachusetts, WALTER GRAHAM TILLOU, of New Haven, in the county of New Haven and State of Connecticut, and WVILLIAM' THOMPSON RICHARDS, of Newton, in the county of Middlesex and State of Massachusetts,have invented a new and usefullmprovement in Sewing-Machines, of which the following is afull, clear, and exact description.

Our invention relates to an improvement in sewing machines, and especially to an improvement in leather sewing machines, and it relates particularly to the presser foot of such machines.

The object of the invention is to so construct the presser foot and connect it with the presser bar, that the presser foot will be capable of three adjustments, namely, a vertical adjustment, a horizontal adjustment upon a horizontal plane, and a rotary adjustment in a horizontal direction, the latter adj ustment being a fine adjustment, and by this improvement the presser foot and the setting points projecting from under the under surfaceot the same can be conveniently and we peditiously adjusted to the center line of stitching; and the said adjustment is further brought into action with good eifect in the event the stitching should not be regular, in order to rectify the error, and in the event of irregularities in the surface of material operated upon.

The invention consists in the novel construction and combination of the several parts, as will be hereinafter fully set forth and pointed out in the claims.

Reference is to be had to the accompanying drawings forming a part 0t this specification, in which similar figures and letters of reference indicate corresponding parts in all the views.

Figure 1 is a front elevation of the head of a leather sewing machine, illustrating the presser bar in position and the application of the presser foot thereto. Fig. 2 is a side elevation of the presser foot, one of the adjusting screws being in section. Fig. 3 is a plan view of the presser foot, and a horizontal section through the presser bar, the section being taken practically on the line 33 of Fig. 2. Fig. 4 is a horizontal section through the presser foot and through the presser bar, said section being taken practically on the line 44 of Fig. 6. Fig. 5 is a vertical section through the presser foot, taken essentially on the line 5-5 of Fig. 4, the section being also taken through the eccentric adjusting pin adapted for fine adjustment. Fig. 6 is aperspective view of the presser foot, viewed from the front partly in section and Figs. 7 and 8 are bottom plan views of the eccentric adjusting, pin.

The presser foot proper A, may be of any suitable or approved construction, but it'is used in connect-ion with an adjusting block B. The adjusting block is somewhat angular in horizontal section, and at or near its center it is provided with an opening 10, extending through from top to bottom, and what may be termed the rear "end of'the adjusting block is split vertically; the cut by which the division is eitected is designated as 11,and said out extends through from the opening 10 to the rear end of the block. The ,opening 10, is usually made circular in cross section, as it is intended to receive and neatly fit to the exterior surface of the lower portion of the presser bar 12 of the machine, and the lower portion of the said bar is usually circular in cross section. The split is formed in the adjusting block in order that the said block may be clamped to a greater or less degree to the presser bar, and this is effected by passing an adjusting screw 13, through the rear portion'of the block from side toside, the screw being located between the opening 10 and the rear end of the block. Thus by tightening or loosening the adj usting screw 13, the block may be held rigidly upon the presser bar, or may be conveniently and expeditiously adjusted vertically thereon, and when the set screw 13 is loosened the adjusting block may be turned in any desired direction upon the presser bar. The outer face of the adjusting block at its forward por- 1 tion is flattened, as shown at 14, in Fig. 4,

and the said flattened surface is provided with a rib 15, formed horizontally thereon near the top.

The upper portion of the shank of the presser foot is adapted to fit against the flattened surface 14 of the adjusting block, and is adapted to have horizontal adjustment thereon; to that end the shank of the presser foot is provided with a transverse groove 16, which receives the rib 15 of the adjusting block, as shown in Figs. 2, 3 and 6. Thus the presser foot is guided in its horizontal adjustment, which is ordinarily transversely of the machine, and when a proper adjustment has been effected, the presser foot is held in its adjusted position by passing an adjusting screw 17 through a slot 18 in the shank of the presser foot and into an aperture produced in the adjusting block below the rib 15, the wall of which aperture is threaded.

It often happens that a very fine horizontal adjustment is required; that is to say, the presser foot is needed to be thrown either to the right or to the left for example, for the purpose heretofore described, and especially for bringing the setting points a of the presser foot projecting from the under surface of the same, as shown in Fig. 2, to the center line of the stitching for the purpose of spreading and forming the stitch. This fine adjustment is difficult to accomplish through the medium of an ordinary set screw, but it may be expeditiously and conveniently effected through the medium of an eccentric adjusting pin 19, which pin is made to enter and snugly fit in a horizontal bore 20, produced in the front end of the adjusting block and communicating with the opening 10, through which the presser bar extends. The presser bar is provided in this instance with a longitudinal groove 2], and the pin 19, is provided with a reduced and eccentric extension 22, formed upon its inner end, the said reduced and eccentric extension being made to enter the slot 21 in the presser bar. The pin 19 is also provided with slot 23 for the purpose of spreading open and slightly increasing its original diameter greater than its receiving aperture 24, so that when inserted in the latter, it may have suitable frictional engagement with inner walls of said aperture for the purpose of retaining a predetermined position.

The adjusting pin has a throwin two directions, to the right and to the left, the position of the eccentric extension in both of the throws being clearly shown in Fig. 7. The body of the pin is provided with a cut 23, diagonally located, and extending from the inner end of the main body some distance toward the front thereof; and the front end of the body of the pin is provided with a slot 24, whereby it may be turned by means of a screwdriver or like instrument. It will thus be observed that through the medium of the adjusting screw 13 in the adjusting block the block and presser foot may be vertically adjusted or turned upon the presser bar, and that through the medium of the adjusting screw 17, the presser foot proper maybe horizontally adjusted upon the block, and that by turning the eccentric pin 19 to the rightor to the leftand loosening the set screw 13 to a slight degree, the adjusting block may be turned to the right or to the left to accomplish the finest adjustment required horizontally to and from a predetermined line of stitching.

In Fig. 1 we have shown the head 0 of a leather sewing machine and the presser bar 12 in position in the head, and likewise a driving mechanism for the presser bar, but the said mechanism for the presser bar may be of any construction and constitutes no portion of the present invention.

Having thus described our invention, we claim as new and desire to secure by Letters Patent- 1. In a sewing machine, the combination, with a presser bar having a groove produced therein, of an adjusting block having an opening receiving the grooved portion of the presser bar, the block being slotted adjacent to the presser bar opening and provided with an adjusting screw at its slotted portion, the presser foot having guided and horizontal adjustment upon the presser block, and an adjusting pin held to turn in the adjusting block, provided with an eccentric extension entering the groove in the presser bar, as and for the purpose specified.

2. In a sewing machine, the combination with a presser bar and an adjusting block adapted for vertical adjustment upon a presser bar, a presser foot having guided horizontal adjustment upon the adjusting block, and an adjusting device carried by the block, substantially as shown and described, whereby the presser foot is horizontally adjusted in a path at an angle to the path of its adjustment on the block, as and for the purpose specified.

3. In a leather sewing machine, the combination with a presser bar and an adjusting block adapted for adjustable connection with a presser bar, a presser foot horizontally adjustable upon the adjusting block, and a split eccentric pin carried by the adjusting block and adapted for engagement with the presser bar, the said pin imparting fine adjustment to the presser foot at an angle to the line of its horizontal adjustment, substantially as shown and described. HENRY ALVIN DODGE. WALTER GRAHAM 'JILLOU. WILLIAM THOMPSON RICHARDS. 'Wit-nesses to signatures of Henry Alvin Dodge and William Thompson Richards:

H. SToRER BARRY, WM. J NO. LEYLAND. Witnesses to signature of IValter Graham Tillou:

WILLIAM G. MITCHELL, J. W. HENDRIoKs.

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