US1024800A - Tension device. - Google Patents

Description

J. o. MGK'EAN.

TENSION DEVICE. APLIUATION FILED DBO. 2 6, 1911.

Patented Apr. 3o, 1912.

UNITED siairns AI,#Airiivi OFFICE.A

JOHN O. MCKEAN, OF WIESTFIELD, MASSACHUSETTS, ASSIGNOR TO FOSTER MACHINE COMPANY, F WESTFIELD, MASSACHUSETTS, A CORPORATION 0F MAINE.

TENSION DEVICE. l

Specification of Letters Patent.

Patented'Apr.3o,1912. i l

Application filed December 26, 1911. Serial No. 667,854.

To all whom it may concern;

Be it known that I, JOHN O. MOKEAN, a citizen of the United States, residing at Westfield, in the county of Hampden and State of Massachusetts, have invented new and useful Improvements in Tension Devices, of which the following is a specification.

This invention is a tension device designed toI give an appropriate tension to a quickly moving thread in a winding machine and consists essentially of a lower member, having an axial perpendicular projectio-n, revolubly mounted, and an upper member in the form of a washer mounted upon the axial projection of the lower member.

In the drawings: Figure 1l shows my new tension device applied to a winding machine Fig. 2 is a planview `on an enlarged scale of my improved tension device; Flg. 3 is a side elevation of the device shown in Fig. 2; and Figs. 4 and 5 are central longitudinal sections of the preferred form of the upper and lower tension members respectively.

'In the practical working of tension devices several diiiculties occur, among which are the cutting of the friction surfaces of the tension device by the rapidly moving thread, under pressure; the clogging of the device by the deposit of grease from the thread; the clogging of the device by the deposit ,of lint from the thread when the thread is a scoured or dry thread; and the difficulty caused by the suddenly increased drag `upon the thread caused by knots or the like passing into the tension device, when the members are held in fixed relationship or with a steady pressure.

It is the object of my invention to' produce a device which will have none of the defects above enumerated and which will be eiiicient in the performance of itstensioning function. Y

My device is applicable to various forms of winding machines and in the drawings l have shown it as applied to a winding ma'- chine such as is shown in my United States Letters Patent, No. 952,015. I have indicated, in order to show the organization and relation of the parts, the cam drum A, the driving drum B, the thread guide C and cop D of this machine.

Mounted upon the rod 1 in front of the 5 5 machine is the tension device, which is adjustably secured upon the rodl by a setscrew 2 so that it can be moved, if desired, longitudinally of the rod. The rod 1 4is preferably of glass or of metal withl a surl face of vitried material, and when such a rod is employed a disk 2a of leather, rubber or the like is interposed between the end of the set-screw 2 and the surface of'l rod l. The tension device is made up of a table t11 anda pivot t1, shown in dotted lines in Fig. 3, a lower tension member t3, 22,'mounted thereon, an upper member t3 mounted upon the part t2, and in the preferred form shown in the drawings, a guard member t, and a guide member t5. The parts are supported upon a casting t6 bored to be vmounted upon rod 1 and secured in place by set-screw 2 vor other means. This casting is provided Ywith the usual horn t7 to guide the thread on its passage from the source of supply to the tension device. It will be observed'that the tension device is set to one side of a direct line from the source of supply to the eye of the drop lever w, the object being to insure that the thread shall always tend to draw into the tension device (see Fig. 2).

The member t2 is shown in Figs. 2 and 3, its inner surfaces being indicated by dotted lines and in section in Fig. 5. It willbe observed that it is made up of a dished, hollow member having a conical, hollow, axial extension 1522.

The part lisis` shown in Figsp2, 3 and 4. Part t3 is a dished hollow member having an axial perforation somewhat larger than the base of the conical part t2 and designed, in use, to be mounted upon a conical eX- tension 1522, as shown in Figs. 2 and 3.

The supporting casting t6 being mounted upon the rod 1 and secured kin the desired position, the tension device is assembled by placing part t3 upon the guard t* and then placing part t2 over the table t, the dished lower part covering the table t and the member t2 pivoting upon the upperl end of a spindle t1., The table t is ldesigned to fit. loosely within the hollow of the member t2 f when the'member t2 is pivoted on spindletl, so thatany aberration in the motion of thatl part will bring its inner surfaces into con-y tact with table 131.1 and checkfthe swing by the frictional contact. The part t2 is now shifted along the guard and deposited upon the parti22 with its convex side down. The thread is laid through the device, the horn 110 t7 serving as a guide and the guide bar t5 upon the other side guiding the thread between the disks. The guard t* projects close to the up-per end of 22 so that the part t3 .5cannot `be accidentally displaced, nor the parts disassembledwithout the deliberate action of the operator by passing the disk t3 onto the guard t and then removing the part t2 from the spindle, which being done, the part t3 may be removed from the guard. The effect of this is that when the parts are v assembled in the proper order as above directed, the guard serves to lock the parts in their proper organization.

The operation is as; follows: `The thread having been laid from the supply, through the tension device to theeye m of drop bar .fr and thence to the thread guide C and cop D, the machine is started and the thread,

owing to the fact that the tension device is ber t?.

a little to one side of the supply,l draws to- Award the base of thefconical extension 22, the upper tension member t3 resting on the thread and pressing it upon the lower mem- The draft of the thread will rotate the two tension members t2 and t3, and, if the draft on the thread tends to exceed the maximum desired (which is determined by the weight of the upper meniber t3) the inward pull of thethread against the conical lieving tension.

, base of extension t will cause the thread to ride up slightly upon the conical base of extension t2?, thus wedging upward momentarily the upper tension member t3 and re- Y The passage of a knot through the device does not increase tension on the thread to the breaking point, as the easy entrance to the device formed vby the curved surfaces of the two tensionmembers.

permits the knot -to wedge them apart and the knot passes without' trouble. By the rotation of the parts the abrasive action of the thread 'is distributedequallyover the .tension surfaces and the formation of grooves '45" prevented, while the same rotation prevents the laying of grease in ridges alongside the traveling thread as may happenv in tension devices in which the lower member is fixed, since the thread bv the rotation of the lower member continually sweeps and cleans every part of the upper surface of the lower mem ber, thus cleaning and preventing the accu-l mulation of grease in ridges to interfere with the .pressure of the upper member upon the thread. When scoured or dry yarn is carried through the tension device, lint and the like which it carries, as it is removed from the yarn by the action of the tension members, collects upon the extension 22 and tends to wind'V about it as it revolves and owing' to t-he conicity of extension 1522, thi

lint and fiber quickly works upward towar the small end of the taper, .where it is easily removed by the attendant when it does not remove itself and .thus does not accumulate in the tension device to clog and interfere with its action. The eye of the drop bar is preferably formed with a porcelain bushing indicated at l In the machine to which my tension device is shown as applied in the drawings, the

bracket which carries the rod 1 and the tension device is designed when necessary to be dropped, and -for this reason the feature of my device which prevents the escape of the part t3 is especially useful, and it is further r useful since the upper member cannot under any conditions of service or accident be thrown from its place.

I claim:

1.1In a tension device, a lsupport for the parts, a vert-ical pin mounted thereon; a tension disk having a hollow axial extension, extending upward, by vwhich it is mounted and balanced upon the pin; a second tension disk having an axial perforation by which vit is mounted upon the conical, axial extension, all combined and operating substantiallyas described.

2. In a tensiony device, a support Ifor the parts; a vertical pin mounted thereon; a tension disk having a hollow outwardly conical axial extension extending upward .by which it is mounted and balanced upon upon the conical axial extension and a guard extending over the conical axial extension to retain the parts against accidental displacement, all combined and operating substantially as described. f

Signed by me at Westfield, Massachu-` setts, this 20th day of December, 1911.

' JOHN o. MCKEAN.

Witnesses:

LESTER CAMPBELL, ALICE C. BREEN.

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