US446465A - Thread-unwinder for sewing-machines - Google Patents

Description

(No Model.)

M. V. PALMER.

THREAD UNWINDBR FOR SEWING MACHINES. No. 446,465.

atented Feb. 1'7, 1891.

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MARO VIRGIIJ PALMER, OF IVIILIMANTIC, ASSIGNOR TO TIIE YILIJIMANTIC LINEN COMPANY, OF HARTFORD, CONNECTICUT.

THREADUNWINDER FOR SEWINGDVICHINES.

SPECIFICATION forming part of Letters Patent No. 446,465, dated February 1'7, i891. Application filed February 23, 1888. Serial No. 264,951. (No model.)

To a/ZZ whom 2725 may concern.-

Be it known that I, Mano VIRGIL PALMER, of Willimantic, in the county of lViudhain and State of Connecticut, have invented certain new and useful Improvements in Unfwinders for Thread and the Like, of which the following is a full, clear, and exact description, whereby any one skilled in the art can make and use the same.

My invention relates to the class of devices adapted to be used in unwinding from a cone, spool, or bobbin the thread that has been wound thereon, my improved unwinder being especially adapted for use in unwinding thread as it is used in sewing or in the manufacture of knitted or woven fabrics.

The object of my invention is to provide a device that will secure a more uniform tension on the thread or yarn as it is unwound, and will also tend to preventI its breaking in the unwinding.

T0 this end my invention consists in the combination of the several parts making up the device as a whole, as more particularly hereinafter described, and pointed lout in the claims.

Referring to the drawings, Figure 1 is a view in central vertical longitudinal section of a standard fitted with my improved un- Winder. Fig. 2 is a detail perspective view illustrating'the operation of the unwinder.

In the use of thread or yarn for sewing or for making various fabrics the mass of thread, whether in a cone or on a spool or bobbin, is supported in a position from which it can be conveniently unwound, the thread being led through a suitable guide. Unless something in the nature ot' what I term an un- Winder7 is used the thread is liable to catch under the edge of the spool or mass and cause an uneven and varying tension and often breaking the thread. This difficulty is cx perienced with softdinished thread and is increased with hard-iinished, as the latter is apt to throw off in coils that drop to the base of the spool or mass.

In the accompanying drawings, the letter a denotes a mass of thread wound into a form that is called a cone on a tapered hollow bobbin I), that is usually made of paper or 5o strawboard. Such a cone is placed on the post c, that rises from a base or support d, that is of any convenient shape and material. The stem e of the unwinder e is inserted in the hollow c of the post c, and from it the arms e2 branch outward and then downward to the annular base eg of the unwinder, that occupies in its normal state a position in a plane a lit-tie below the bottom of the mass of the cone or spool. This unwinder is sup- 6o ported on the post by means that leave it free to rotate as well as to rise and fall under the pull of the thread a', that in the proper position for utilizing the unwinder passes down and under the annular base of the unwinder, and then upward and through the guide f, that is usually fixed directly over the end of the post by means ot' a standard f.

By the use of my improved unwinder the 7o breaking of thread or yarn is prevented and a greater uniformity of tension on the thread gained.

As shown in the drawings, the unwinder is made of wire in the form of a frame-work, with acentral stein and three spreading arms that support the annular base 5 but I do not limit myself to the precise construction or material so long as the device consists of the central stem supported on the standard with 8o the pendent ring hung near the plane of the base of the mass of thread.

I claim as my invention-` l. In combination with the post c, fixed on a base or support and having a central open- 8 5 ing for the reception of the unwinderstem, the unwinder c, having a stem e projecting downward from the crosswise arms on the upper part of the unwinder, and also an annular base es, located near the bottom of the 9o post and below the normal position of the under part of a mass of thread when the latter is supported on the post, all substantially as described.

2. In combination with the central post c, rising from a base d, a thread-guide f, supported above the upper end of the base, the central opening in the base to receive the stom of the un\vnder,tl1e unwindor e, llavof tho bottom of the mass of thread supng a pivotal stom e', arms e2, that branch ported on the post, all substantially as dofrom the central stem and turn downward scribed.

at the sides and connected with an annnlal` MAR() VIRGIL PALMER. base e, the said unwinder being loosely sup- Witnesses:

ported n the hole in the post, and the annu- GEORGE \V. MELONY,

lar base of the nnwinder lying nearthe level E. S. BOSS.

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