US367622A - Bobbin - Google Patents

Description

(No Model.)

0. HARDY.

BOBBIN.

Patented Aug. 2, 1887.

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UNITED STATES PATENT OFFICE.

CHARLES HARDY, OF NASHUA, NEV HAMPSHIRE.

BOBBIN.

SPECIFICATION forming part of Letters Patent No. 367,622, dated August 2, 1887.

Application filed November .20, 1856. Serial No. 219,474.

To all whom it may concern:

Be it known that I, CHARLES HARDY, acitizen of the United States, residing at Nashua, in the county of Hillsborough and State of New Hampshire, have invented a new and useful Improvement in Bobbins, of which the following is a specification.

My invention'relates to that class of devices shown in my patent of August 22, 1876, No. 181,436, upon which the present invention is an improvement. It is the purpose of said improvement to provide means for strengthening such articles against inward or outward strain, and to so combine the strengthening ring or re-enforce therewith that it shall be entirely hidden, preserved from contact, frictional or otherwise, and supported upon all sides by the material in which it is embedded. It is a further purpose of my invention to so cover and inclose the men forcing ring as to avoid the danger of the checking or splintering and chipping out of the wood in the immediate vicinity of the re-enforce.

The invention consists in the several novel features of construction and new combinations of parts, hereinafter fully described, and definitely pointed out in the claims following this specification.

Referring to the drawings accompanying this application, Figure 1 is a view of a bobbin with the ends in section. Fig. 2 is a de tail perspective view of one form of re-enforce. Fig. 3 is an enlarged sectional view of one wall of the bobbin, to more clearly illustrate the construction. Fig. 4 is an enlarged view of the same with the re-cnforce and filling ring re moved. Fig. 5 is a view of a modified form of the re'enforce.

In the said drawings, the referencenumeral 1 denotes a bobbin, or, as it is sometimes termed, a quill, of the primitive form,which does not differ materially, so far as my present invention is concerned, from any of the forms now in use. In one or both ends of this quill or bobbin I form an annular cavity, 2, cut parallel with the axisand in such manner as to leave a solid wall of the material of which the bobbin is formed upon both the inner and outer side of said chamber. Vithin this annular chamber 2 I place a metallic re-enforce, 3, which may be either a coil of two or more (No model.)

turns, as shown in Fig. 2, formed by winding wire of suitable size upon a mandrel, or a solid ring, like that shown in Fig. 5. The depth of the cavity 2 is such, relatively to the size of the re-enforcing ring or coil, that the latter,

. when forced into the cavity, will only partly fill the same. XVithin the outer end of said annular cavity or chamber 2 I then insert a filling-ring or annulus, 4, made of the same material as the bobbin and coated with glue or cement before insertion. This filling-ring closely fits the chamber and completely closes its open end. Vhen combined with the bob-' bin in this manner, the re-enforce is not only completely concealed from view, butit is wholly inclosed within and supported upon all sides by the walls of the chamber 2 and the end of the filling-ring. By this construction oxidation of the metal of the re-en force is effectually which are radial to the bobbin, whereas if the rc-cnforce were inserted in an open chamber or cavity without a filling-ring 4, a crushing strain applied to the hollow tube 1 near either end, but not directly over and upon the menforce itself, would frequently cause the metal to yield in a direction parallel, or substantially so,

with the axis of the bobbin and force the ring or coil out of the cavity containing it. Moreover, in the absence of the fillingring the metallic oxide, which speedily forms, becomes mingled with the oil or other moisture, and soon penetrates the wood, rendering the bobbin unfit for use. Finally, the filling-ring 4, being firmly glued or cemented in the cavity 2, when the bobbin is accidentally crushed, the wood at the end of the tube which adheres to thefillingring will not check or splinter and chip out, as it would if the cemented filling-ring were not present; hence the bobbin may, by the insertion of a conical mandrel, be restored to its original shape, and will usually be in as good condition as it was when first constructed.

Heretofore, and prior to my invention, a spool or bobbin has been provided with an annular groove in the end, having a wire reenforce inserted therein, the wire being wound or braided with fibrous material saturated with glue. In this invention the re-enforce nearly or entirely fills the annular chamber, and in the absence of the filling-ring it is exposed to oxidation and contact with external objects, since a comparatively-slight frictional contact will abrade or remove the fibrous sheath or covering and expose the metal in the open end of the annular chamber. This construc tion is open to all the objections specified, and has been found incapable of practical use.

In another invention a re enforcing ring composed of a compound of glue, glycerine, and sulphate of lead has been applied to the exterior of a bobbin at or near the end, and a reenforce composed of the same materials has been placed in an annular chamber in the end of the bobbin, no fillingring being employed.

Finally, in my own patent, No. 181,436, hereinbefore mentioned, a metal re-enforce is employed, held in place by a bushing; but instead of an annular chamber cut in the end of the bobbin the inner surface of the latter is chamfcred or gained, and the re-enforce is set therein with its inner face wholly exposed, and the filling-ring is then inserted, its inner surface being without support. \Vith this construction the ire-enforce is exposed to oxidation, and when the bobbin is crushed the filling-ring is extremely liable to splinter excessively, because of its want of support upon its inner face,-and when the bobbin is restored to shape pieces of said ring are liable to chip out and fall off. The same or a similar result is met with in all cases where no filling-ring is employed, cemented to both the inner and outer walls of the annular chamber.

By my invention great strength and durability are imparted to the bobbin by the support of the re-enforce upon all sides. OXidation of the metal is entirely avoided, and should the tube be accidentally crushed itmay be restored to shape without causing the wood to check out and expose the re-enforcing ring. Moreover, by entirely inclosing the ring I am able to dispense with anything like a fibrous coating or covering, and am able, therefore, to employ a much thicker re-enforce than would be possible if the metal were wound before insertingit. Finally, the filling-ring being of the same material and of the'same grain as the bobbin when the same is cemented in and the wood dressed down to finish the bobbin, the latter becomes, both in appearance and practical use, the same as if the whole were formed of one solid piece with a metal re -enforce embedded. My invention is the same whether the solid ring 3 or the spiral coil 3 is employed.

Having thus described my invention, what I claim is v 1. A bobbin having an annular cavity or chamber in its end, in combination with a metallic re-enforce partly filling said chamber, and a filling-ring inserted in and wholly closing the open end of said chamber, substantially as specified. Y

2. A bobbin having an annular cavity or chamber cut in its end, in combination with a metallic re-enforce partly filling said chamber, and a filling-ring cemented in the open end of said chamber, the re-enforee being supported and inclosed 011 three sides by the walls of said annular chamber and upon the fourth side by the fillingring, substantially as specified.

3. The combination, with the bobbin 1, hav ing an annular chamber, 2, in its end, of a spiral rcenforcing coil, 3, and a filliug-ring,4, all constructed and arranged substantially as specified.

CHARLES HARDY.

W'itnesses:

O. L. LOVELANI), It. T. SMITH.

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