US287928A - Tension-release - Google Patents

Description

(No Model.)

J. 8v W. L. HEBERLING.

E TENSION RELEASE. NG' 287'928' Patented Nov. 6,1883.

f `JOHN,HEBERLING AND lWILLIAM fi UNITED STATES PATENT EEicE- i L. HEBERLING, OF MOUNT PLEASANT, OHIO.

TENSION-RELEASE.

SPECIFICATIGN forming part of Letters Patent No. 287,928, dated November 6, 1883.

Application filed July 19, 1883i (No model.)

To @ZZ whom it' may concern..-

Be it known that We, JOHN HEBERLTNG and W'ILLIAM L. HEEERLING, citizens of the vUnited States, residing at Mount Pleasant, in the county of Jefferson and State of Ohio, have invented certain new anduseful Improvements in Tension-Releases; and We do declare the ,following to be a full, clear, and exact description of the invention, such as will enable others skilled in the 'art to which it appertains to make and use the saine, referencebeinghad to the accompanying drawings, and to the letters and gures of reference marked thereon, which form a part of this specification.

'Our invention relates Y to improvements in devices for releasing the tension from the upper thread of sewing-machines; and it consists in the devices hereinafter fully described, and specifically pointed out in the claims. f

AIn the draivings, Figure l is a perspective view, illustrating our invention applied to a sewing-maohine head. Fig. 2 is a vertical detached section of the head and our tension mechanism. Fig. 3 is a sectional view similar to Fig. 2, except the tension in Fig. 2 is onthe thread, While in Fig. 3 it is released. Fig. 4

is a detail viewof the piston; and Figs. 5, 6, and 7 are detail views.

The object of our invention is to provide a convenient, simple, and easily-operated device for releasing the tension on the upper thread of the machine, so the Work may be removed from under the needle readily, and without breaking the thread or injuring the`needle.

Our tension-release is composed of the stud A, secured to the sewing-machine head, the coil-spring B, placed thereon, the disks (l C,

the piston D, and the thumb-nut Il, all ofA which will be described.

' In applying our invention to a machine We drill a mortise, f, in the .front of the machinehead F, next the operator, and from the base of this mortise We form the threaded extension f', of, smaller diameter than the said, mortise.

4The stud A is threaded at both ends and turned into this extension f', as shown. The outer end of this stud is formed with the longitudinal slot fr, open at its outer end, as shown. This slot is madeof a length to extend beyond the position of the tension-disks when thelatter are in place on the stud. The piston D is made of a size to slide in the slot a, and it is provided on one end with the ring d, iitted to move on the stud A, and on its opposite end is screwed or riveted the thumb-piece or button d. This piston is placed ring end foremost in the stud A. The disks C C are then slipped over the piston and stud, followed by 'the thumb-nut E,Whioh turns on the stud, and

ently described, Where the ring d is removableA` and the thumb-piece d is permanently riveted in place, the operation as above is changedto the extent that the disks and nut E are placed on the piston before it is placed in the slot of the stud.

The spring B bears between the base of the mort-ise f and the ring d, and its outward press, ure is thence applied to the disks, forcing them closely together. By means of the thumbnut E the degree of tension may -be readily regulated to suit the different-sized threads or the Wishes ofthe operator.

When the several parts are in the position shown in Fig. 2, the tension is on the thread. In Fig. 3 the piston, by pressure on button d, has been forced in, the ring d pushing the spring' B back, and the tension is released, and the threadmay be readily drawn through the disks.

In constructing our piston, inner ring, 85e., We prefer to stamp the Whole out of sheet metal, in shape as shown in Figs. 6 and 7 so thatthe thumb-.piece d may be riveted permanently on the outer end of the piston D, While the ring d and the inner end of the pistonD are so shaped that they may be attached or detached at will. This may be done by notching the edges of the piston D near its inner end, as shown at ca in Fig. 5, and forming the ring d with proj ections c e on its inner side, to fit into the notches a a', so that if the inner end of thepistonDbe inserted in the ring d while it is yet off the stud A and turned round in it the proj ections e e on the inside of the ring will pass into the notches a a in the piston, and if while there the piston and ring are passed to their respective positions in and on the stud A they will be held intact by it, so as to retain their proper relative posit-ions with each other, as shown in Fig. 6.

It is apparent that when these parts are made as just described the thumb-nut E and disks C C are all placed on the piston D from its inner end, while it is yet out of the slotted stud A, and before the ring d has been fixed upon it, and the disks, nut, 81o., maybe readily separated from the piston, when the latter is removed from the stud, without the removal ofthe thumbbutton,which,being permanently riveted to the piston, cannot become unscrewed and lost, as in case of the threaded button before described, and shown in Fig. 4l.

It will be seen that our device is simple,and is not liable to get out of order, and that it can be profitably applied to agreat variety of sew ing-machines, regardless of the internal mechanism of their heads.

Having thus described our invention, what we claim, and desire to secure by Letters Patent, is

1. In a tension-release, the combination,

substantially as described and shown, of the sewing-machine head having the mortise fformed in its front edge, and the threaded socket f extended therefrom, the stud A, made smaller than mortise f, and having its inner end screwed into the extension j', and its outer end provided with the slot a, the spring B, secured in the niortise f on the stud A, the piston D, placed in the slot a and having the ring d secured on its inner end and bearing against the spring B, thetension-disks C C, placed on the stud againstthe ring d, and the retaining and adjusting nut E, screwed on the outer end of the stud against the disks C C, all arranged and operating as and for the purposes specied. 2. The tension-release, substantially as described and shown, composed of the supporting-stud having a slot, a, formed in its` outer` end, theftensionspring, the disks, the retaining-nut,the piston iitted to the slot inthe stud,

and placed and movable therein, and having notches a a formed in its inner end, and the ring d,having projections orlugse e extended inward therefrom into the notches a a of the piston, all arranged and adapted to operate substantially as set forth.

In testimony whereof We afX our signatures in presence of two witnesses.

JOHN HEBERLING.

WILLIAM L. HEBERLING.

Witnesses:

R. T.l UPDEGRAFF,

E. B. JONES.

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