US715407A - Bobbin-carrier. - Google Patents

Description

' No. 715,407. Patented Dec. 9, I902.

' G. H. MILLER.

BOBBEN QARBIEB.

(Application filed Oct. 23, 1901.)

(No Model.)

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UNITED STATES PATENT OFFICE.

GEORGE l-I. MILLER, OF HOLYOKE, MASSACHUSETTS, ASSIGNOR TO THE AMERICAN THREAD COMPANY, OF NEW YORK, N. Y., A CORPORA- TION OF NEW JERSEY.

BOBBlN-CARRIER.

SPECIFICATION forming part of Letters Patent N 0. 715,407, dated December 9, 1902.

Application filed October 23,1901. Serial No. 79,680. (No model.)

To all whom, it HQ/00y concern:

Be it known that I, GEORGE H. MILLER, a

citizen of the United States, residing at .Hol-- yoke, county of Hampdeu, State of Massachusetts, have invented certain new and useful Improvements in Bobbin-Carriers, of which the following is a full, clear, and exact de-' scription.

My invention relates to improvements in bobbin-carriers for sewing-machines.

The main object of my invention is to provide an improved carrying means for a bobbin, which is adapted to be inserted within or carried by a shuttle. I

In the drawings, Figure 1 is a sectional elevation of a part of a shuttle and bobbin-case embodying my invention. Fig. 2 is a perspective view ofa detail of construction. Fig. 8is a plan view of the part shown in Fig. 2 with ahelical spring attached thereto.

A is a shuttle.

B is a plate carrying a stud C.

D is a bobbin-case.

E is a bobbin.

F is a hub carried by the case D and adapted to slide onto the stud O.

G is a disk of a size approximating the interior of the case D and preferably having a sleeve H, adapted to loosely fit upon the hub F.

I is a helical spring, which may be secured to the disk G or an extension thereof-for example, the extension J. The coil of the spring is such that it normally expands to a size slightly in excess of the internal diameter of the case D. Consequently when the disk G is inserted into the case D the spring I will not only tend to yieldinglypress the disk away from the top of the case, but will also tend to prevent the accidental detachment of the parts. When the parts are assembled, as shown in Fig. 1, the function of the spring is to press against and hold the plate G, which in turn presses against the bobbin E, which in turn presses against the plate B. Thus it will be seen that a slight friction is applied to the bobbin to prevent said bobbin from turningloosely, which would resultin the snarling ortanglingof the thread as itbeeomes unwound therefrom. The bobbinE is formed usually upon a tube K, of paper or of. other suitable material, the bore of which is sufficiently large to freely pass over the sleeve H.

In operation the thread is withdrawn in the usual way by the sewing-machine. The outside tension of the thread is applied in the usual way-for example, by a tension-spring L. The thread inside, between the bobbin E andthe tension-sprin g L, is not allowed to become slack, and consequently cannot become snarled. In this particular construction the bobbin revolves on the sleeve H. Consequently there is no appreciable wear of the parts. Heret-ofore where the bobbin revolved upon and with a metal spool the wear of the metal parts made a grit and dirt that frequently soiled the thread, to the injury of that product. When removing a bobbin or an empty tube from the case, it will be found that the spring will act to retain the sleeve and disk, the construction permitting a longitudinal movement upon the hub. This retentive force may be overcome, however, by a slight outward pull on the sleeve when it is desired to be removed.

What I claim is 1. In adevice of the character described, a bobbin-case, a central revoluble sleeve adapted to support a bobbin, a disk carried thereby and a spiral spring carried by the disk, that end of the spring having the smaller coils being directly connected with the disk, the largest coil of the spring being normally of greater diameter than the interior of the case and bearin g against the latter, substantially as and for the purpose described.

2. Ina device of the character described, a bobbin-case, a central revoluble sleeve adapted to support a bobbin, a disk carried thereby and a spiral spring fric'tionally carried by the disk, that end of the spring having the smaller coils being directly connected with the disk, the largest coil of the spring being nor mally of greater diameter than the interior of the case and bearing against the latter, substautially as and for the purpose described.

Signed at Holyoke, Masschusetts, this 21st day of October, 1901.

GEORGE H. MILLER.

Witnesses:

ARTHUR C. Lrvnmvronn, CHARLES E. BLIss.

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