US313933A - Julius c - Google Patents

Description

(No Model.)

J. O. GOODWIN.

MEANS FOR VERTIGALLY REGIPROGAT-ING SEWING MACHINE PRESSER FEET.

No. 313,933. Patented Mar. 17, 1885 @gmmmmmmm WITNESSES INVENTOR Tulius L. Goodwin Q. Q. W By his .dttorn zys w. c. M; %%mj,

Parent JULIUS (l. GOODWIN, OF PHILADELPHIA, PENNSYLVANIA, ASSIGNOR TO THE AMERICAN BUTTONHOLE, OVERSEAMING AND SEWING MACHINE COM- PANY, or SAME PLACE.

MEANS FOR VERTICALLY RECIPROCATING SEWING-MACHINE PRESSER-FEET.

SPECIFICATION forming part of Letters Patent No. 313,933, dated March 17,, 1885.

Application filed August 4, 1884. (No model.)

To all whom it may concern.-

Be it known that I, J ULIUs O. Goonwnv, of the city of Philadelphia, in the State of Penn sylvania, have invented certain new and useful Means for Vertically Reciprocating Sewing- Machine Presser-Feet, of which the following is a specification.

The object of my invention is to provide a practical, simple, adjustable mechanism for to vertically moving the presser-foot of a sew ing-machine, the adjustment being designed to vary the vertical reciprocation of the presser-foot to accommodate materials of varying thickness.

In the accompanyingdrawings, Figure 1 is an end view of the head of a sewingmachine with the face-plate removed. Fig. 2 is a longitudinal section through the end of the sewing-machine head.

I have only illustrated such parts of the machine as are necessary to a full understand ing of the invention. 'The other portions of the machine may be of any usual and wellknown construction, to no special one of which this invention is limited.

The driving-shaft A, which is mounted in suitable bearings in the head of the machine, carries upon its end, as usual, a disk or camplate, B. A wrist-pin, Z), on this disk travels 0 in a camtrack, O, in a plate secured upon the needle-bar D, so that the disk in its rotation will impart a vertical reciprocatory motion to the needle-bar, as usual in this class of machines.

In this instance I have illustrated the disk 13 as a cam-disk, it beingprovided with a cam lip or teat, F, for producing the vertical. motion of the presser-foot, as will now be described, though, of course, it will be obvious path of the cam projection F on the disk 13,

as clearly indicated in Fig. 1. This lever G rocks upon a fulcrum, I, carried in the head of the machine. At each revolution of the to those skilled in the art that a pin on a cirdisk B, therefore, when the cam'lip F strikes the roller 9 on the arm G the presser-foot will be elevated. Of course if the fulcrum of the lever G be raised or lowered the amount of the vertical movement of the bar H will correspondingly be varied, and I accomplish this result in the following manner: The fulcrum I consists of an eccentric-disk mounted on a bolt, t, which projects through the case of the machine, and is provided with a thumb nut, K, by means of which the eccentric I may be rotated, so as to raise or lower. the fulcrum of the lever G. In order to hold the eccentric in any position to which it may be adjusted,

I interpose a concavo-convex spring frictionwasher between the case of the machine and the shoulder formed by the hub of the thumb nut, as clearly shown in Fig. 2.

The organization here described is simple in construction and capable of being adjusted permanently, so as to give any required vertical reciprocation of the presser-foot bar.

' I am aware that a lever to vertically reciprocate a presserfoot has been pivoted on an adjustable fulcrum or support in the head of the machine, one end of said lever being vibrated by a cam on the needle-shaft and the other working against a pin on the presserfoot bar to elevate it, as shown, for instance, in the patent of James and Robert Blake, No. 149,565, of April 14, 1874.

\Vhat I claim as my invention is 1. The combination of the disk or cam-plate, the presser-foot bar, its actuating-lever pivoted thercto,and an adjustable eccentric, which serves as a fulcrum for said arm.

2. The combination of the disk or cam-plate, the pressenfoot bar, the actuating-arm pivoted thereto, the adj ustable eccentric, which serves as its fulcrum, the bolt on which said eccentric is carried, means for rotating said bolt, and a 0 frictionwasher for holding the eccentric in any position into which it may be rotated.

In testimony whereof I havehereunto subscribed my name.

JULIUS O. GOODVVIN.

Images