US1365783A - Tension device - Google Patents

Description

A. HER-MANNS.

TENSIONv DEVICE.

APPLICATION FILED 001'. 9. 1919.

1,365,783. Patented Jan. 18, 1921.

WITNESS IN l/E N TOR W M \excmcler ermcm'nq A TTORNEY UNITED STATES PATENT OFFICE.

TENSION DEVICE.

s ecification of Letters ratent. Patented J an. 18, 1921.

Application filed October a, 1910. serial'lio. 329,508.

To all whom it may concern:

Be it known that I, ALEXANDER Han- MANNS a citizen of the United states residing at Iaterson, in the county of Passalc and State of New Jersey, have invented certain new and useful Improvements in Tens on Devices, of which the following is a speclfication.

In a well known type of tension device for loom shuttles of the class in which the tension members have alternatin three guides and one is pivoted and normal y sprln -hel d away from the other, the pivoted mem er 1s formed of wire and has its guides or eyelets produced by forming loops 1n the wlre at 1ntervals and giving each loop a half-twist to close the eyelet produced. On account of the thread undergoing a sharp bend where in reachin from the fixed member to the pivoted mem r and back again it extends around the wire of each eyelet the thread becomes badly abraded, especially at the instant when the pivoted member is fully back and the angle is most acute,.and there 1s a whipping of the fibers around the wires which soon results in the tension device becoming clogged with lint, and in addition there is an undue disparity between the tension when the movable member is fully back and when it is at the relatively opposite limit, due to the sharp angle referred to; besides, there is a crevice left where the halftwist forms a crossing of the wire in which the thread will catch unless, according to custom, the crevice is filled with solder.

In another well known type of tension device of the class mentioned the movable member is a simple helix. This movable member also causes the thread to'assume a sharp bend around the wire formin each .coil or eyelet thereof, and it has the urther objection that on account of the fact that every eyelet-forming part thereof is as to its whole extent a helix the movement of the movable member under the pull of the thread is unduly limited by contact of the helical eyelets with the cross pins forming the fixed member of the device.

The object of this invention is to provide a pivoted member for a tension device of the kind referred to whose eyelets will offer broad surfaces to the thread, thus to prevent abrading the latter and reduce the whipping of the fibers around the material of the eyelets and insure a more even tension, and which eyelets will be so connected with each other that said member may have the maxnnum amount of movement toward the complementary or fixed member.

In the accompanying drawing, 4

Figure 1 is a plan View of a fragment of a shuttle having the improved tension device, the top wall of the shuttle being broken away to show the tension device, and

Figs. 2 and 3 are side views of the pivoted member of the tension device.

The shuttle a has the usual cavities b and c for the quill and the tension device, respectively, with a thread guide at connecting the cavities. In the cavity 0 is arranged the line of pins 6 which form the fixed member of the tension device. f designates the pivoted member which is fulcrumed on the pin 9 and is held normally withdrawn from the fixed member by the elastic device It, the

thread being adapted to extend as shown from the ide d in alternate engagement with the pins e and the guides or eyelets of the member f, now to be described in detail.

To form the pivoted member f, a suitable length of wire is used and one end portion is bent to produce a coil 2' and a projecting arm j to which the device It is adapted to be attached, the coil forming the bearing of the member 7 and being adapted to be penetrated by the pin 9.

The remainder of the wire is formed at regular intervals with helices 7s and alter-' nating therewith with elongated connectors Z which are arranged to extend all in substantial coincidence with the central transverse axis of the coil i; viewing the member f in plan (Fig. 1) the series of alternating connectors and helices is at right angles to the arm j, and the series of helices project outward from the series of connectors, which as a series and as to the whole length of each connector lie in substantially the same plane.

Each helix It includes at least two coils, in consequence of which the space or crevice that would otherwise exist, unless it were filled with solder or equivalent, between the ends of two adjoining connectors Z is closed by the part m of the helix.

When the device f is in operative position in the shuttle as shown in Fig. 1, the thread A being engaged with the eyelets formed by the helices 7c and with the pins e in the manner shown, the thread not only has broad contact at each point where it engages the member f, so that the abrading I thereof and the whipping oil of projecting eliminated.

The eyelets k are arranged slightly oblique to a line perpendicular to the axis of coil 2' (see Figs. 2 and 3), that is, they are slightly out of parallelism with the pins 'e which are arranged as usual in parallelism to pin g on which coil 6 has its bearing, This has the eflect of causing the taut thread as the member f is drawn away from the observer in Fig. l to shift slightly over thesurface of the inside of each eyelet, thus distributing -the wear, which in ordinary eyelets, coming always at one point, soon forms a nick therein, especially since such eyelets represent only a single thickness of the w1re.

Having thus fully described my invention, what I claim as new and desire to secure by Letters Patent is '1. A pivoted member for a tension de-' vice of the kind herein set forth consisting of a strip of Wire bent to form a series of elongated connectors all extending 1n substantially the same line and eyelets upstanding relatively to and alternating with said series of connectors, each eyelet being arranged transversely to the series of connectors and being a pluri-coiled helix the respective ends of which project outwardly from the helix-and merge into the connectors next adjoining it on both sides thereof.

2. A pivoted member for a tension device of the kind herein set forth consisting of a strip of wire bent to form a series of clongated connectors all lying as to the full length of each in substantially the same plane and 'alined eyelets upstanding relatively to and alternating with said series of connectors, each eyelet being arranged transversely to the series of connectors and being a pluri-coiled helix the respective ends of which project outwardly from the helix and merge into the connectors next adjoining it on both sides thereof.

3. A pivoted member for a tension de vice of the kind herein set forth consisting of a strip of wire bent to form a series of substantially alined'connectors and eyelets upstanding relatively to and alternating with said series of connectors, each eyelet being arranged transversely but oblique with respect to the series of connectors and being a pluri-coiled helix the respective ends of which project outwardly from the helix and merge into the connectors next adjoining it on both sides thereof.

n testimony whereof I afiix my signature.

ALEXANDER HERMANNS.

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