US2605059A - Bobbin - Google Patents

Description

R. P. BENNETT July 29, 1952 BOBBIN Filed Aug. 51, 1949 I4 l2 IO 9 ll FIG.2.

FIG.4.

FIG. 3.

/l/lll//ll 91" lill/0111111A INVENTOR: Rex ford -P. Bennett Attorneys Patented July 29, 1952 BOBBIN Rexford RBennett, Honesdale, Pa., assigner toV Y The Formica Company, a corporation of Ohio Application August 31, 1949, Serial No. 11.3?270 Claims. f 1

This invention relates to bobbins vfor use on textile winding and twisting machines, and in particular it relates to bobbins having characteristics which make them especially suitable for use in high speed machinery and with modern synthetic yarns such asnylon whichhave a -very high contractive force.

The principal object of thevinvention is to provide a bobbin in which a core of light metal such as aluminum forms a central assembly member to which are aixed a relatively thin nonmetallic bobbin barrel and' bobbin heads, in order that the assembled bobbin'may be light, yet strong, rigid, and well balanced.

Another object is to provide a bobbin which is substantially free of any tendency to distort under the contracting force of nylon or other synthetic yarn, :and which will not damage the yarn by snagging or catching it.

Another object is to provide 4a bobbin which may be readily disassembled into its component Y parts so as to facilitate repair of the bobbin in case of wear or dam-age. y

Because of the light weight and excellent balance which are made possible by the use of a lightweight metal core, the improved bobbin may be satisfactorily employed on spinning machines which operate at speeds of 10,000 to v16,()00 R.. P. M. or higher, and even at such"s`peeds has `almost no tendency to wobble, vibrate, or climb the spindle blade.

The invention is illustrated in a preferred embodiment in the accompanying drawing, in which: Fig. 1 is a longitudinal sectional view of the bobbin mounted on a tapered spindle; Fig. 2 is an enlarged fragmentary sectional view of one end of the bobbin, showing the details of assembly; and Figs. 3 and 4 are fragmentary sectional views similar to Fig. 2 showing alternative arrangements for securing the core header to the bobbin core.

The central element of the bobbin is a lightweight metal core, preferably formed of aluminum, having permanently secured within it a continuous sleeve of laminated plastic material which receives the spindle blade of a textile machine. The use of a laminated plastic, or other non-metallic sleeve avoids `the smudging of the spindle blade which is inevitable if a metal bearing is used. Likewise, the plastic sleeve has no tendency to cling or seize when the bobbin is Referring to the drawings, an A.aluminum or other lightweight metal core 5 is provided with a fixed non-metallic sleeve 6, said sleeve preferably being composed of laminated plastic impregnated with a binder andbeing secured within lthe metal core 5 by rspinning over thej ends of .the core as at 1, and being of suitable shape and dimensions to nt snugly on the spindle. blade 8 of a textile machine. In the preferred form shown in Figs. 1 and 2 the metal core 5 has threads 86 at its' end portions vto receive lightweight annular metal core headers 9 which have their outer faces annularly shouldered at Il).

In order to assure alignment,concentricity and balancing of the core andA core headers,they are preferably assembled rough, and machined from a single center after assembly.

A bobbin barrel I I is soproportioned that it iits snugly on the core headers 9 and has its ends flush with the outer faces of said headers. The barrel likewise is composed of a non-metallic material, preferably a 'laminated plastic impregnated with a binder. They barrel should be of a material which will remainundstorted at temperatures of 225 F.' and moisture conditions of being removed from a tapered spindle blade, and A relative humidity. y

A pair of annular compressible washers I2 and I 3 surround the annular shoulders I9 of the core headers 9 and overlie the ends of the bobbin vbarrel II.

Laminated plastic bobbin heads M and I5 overlie `the washers I2 and I3, respectively, and are screwed to the Core headers 9 by means of a plurality of screws I6. The inner face of each bobbin head is provided with an annular shoulder I'I to engage the shoulder IIJ of the core header 9 so Ias to assure concentricity of the bobbin head. The screws I5 are vdrawn up very tightly in order to grip the barrel II rmly and lock it against longitudinal movement. Likewise, the firm grip compresses the Washers l2 and I3 so that'they iill any irregularities in the abutting surfaces of the barrel I I and bobbin heads I4 and I5, thus avoiding -any possibility of yarn being caught or snagged in a crack between the barrel and the bobbin heads.

A small cup-shaped metal ring traveler guide I8 ispressed into the lend of the bobbin, as seen 3 in Fig. 1, to control yarn tension in the usual Way.

Figs. 3 and 4 illustrate modified arrangements for securing the core headers to the metal core. In the form shown in Fig. 3, the metal core 25 is tapered at 26 to retain the sleeve 6 in place, and has flared ends 21 to engage a wedging face 28 of a core header 29.thus securing the header rmly between the taper 26 and the flared ends 21. The remainder of the assembly is identical with that shown in Figs. l and 2.

In the form shown in Fig. 4, a metal core 35 is flared outwardly at 36 to engage a complementary arcuate face 3l on the inner periphery of a core header 38, and is spun inwardly at its` outer extremity 39 to engage the non-metallic sleeve 6. In all other respects, the modification of Fig. 4 is similar to the bobbin illustrated in4 Figs. 1 and 2.

Theforegoing detailed description is given for clearness of understanding only and no unnecessary limitations should be understood therefrom as modifications will be obvious to those skilled in the art.

I claim:

1. A bobbin, comprising: a cylindrical metal core provided with a xed, continuous nonmetallic internal sleeve which is adapted to t snugly on the spindle blade of a textile machine; a pair of annular metal core headers of substantially larger diameter than said metal core concentrically secured to the ends of the core, said core headers having continuous outer surfaces of substantial area; a non-'metallic'bobbin barrel secured snugly on the core headers so as to be positioned thereby in concentric spaced relation to said metal core, -said barrel having ends affording surfaces which are continuous with those on said headers; a pair of cempressible annular washers overlying the ends otthe barrel; a pair of non-metallic bobbin Vheads having continuous inner surfaces which abut against said washers and the outer surfaces of the core headers; and a plurality of removable fastening `members spaced outwardly from the core to detachably secure said bobbin heads firmly against said core headers and compressible washers to exert a compressive force on the washers and on the ends of the said barrel.

2. A bobbin according to claim 1 wherein the core headers make threaded engagement with the core and the bobbin heads are bolted to the core headers.

' comprising a fixed, continuous sleeve of laminated plastic which is adapted to iit snugly on the spindle blade of a textile machine; a pair of annular metal core headers of substantially larger diameter than said metal core concentrically secured to the ends of the core, said headers having outer surfaces of substantial area provided with concentric shoulders, and said core and headers forming a central frame for the bobbin; a bobbin barrel of laminated plastic secured snugly on said core headers so as to be positioned thereby in concentric spaced relation to said metal core, said barrel having ends affording annular surfaces which are continuous with those on said headers; a pair of compressible washers surrounding the shoulders on the core headers and overlying the ends of the bobbin barrel; a pair of laminated plastic bobbin heads having concentric shoulders complementary to the shoulders on said core headers and inner surfaces which abut against the headers and the washers; and a plurality of screws extending through said bobbin heads and washers to detachably secure the heads firmly to said headers to exert a compressive force on the washers and bobbin barrel.

REXFORD P. BENNETT.

REFERENCES CITED The following references are of record in the le of this patent:

UNITED STATES PATENTS Number Name Date 1,862,694 McConnel et al. June 14, 1932 2,083,337 Mack June 8, 1937 2,304,922 Hoseld Dec. 15, 1942 2,453,247 Moss Nov. 9, 1948

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