US1645701A - Method of making spools - Google Patents

Description

Oct 18,1927. A c HOPKINS 1 METHOD OF MAKING SPOOLS Filed April 18. 1924 q III 7 6 6c fix Patented Oct. 18, 1927.

UNITED STATES PATENT OFFICE.

ARTHUR C. HOPKINS, OF N ILES, MICHIGAN, ASSIGNOR T0 NATIONAL STANDARD COM- PANY, 0F NILES, MICHIGAN, A CORPORATION OF MICHIGAN.

METHOD OF MAKING SPOOLS.

Application filed April 18, 1924. Serial No. 707,393.

This invention relates to spools, particu larly such as are used in wire braiding machines and to a method of making the same, and is fully described in the following specification and shown in the accompanying drawings in which:

Figure 1 is a longitudinal section through a spool showing the dies and tools for forming the same; v

Fig. 2 is a plan view partly 1n section showing the means for supporting the tube during the pressing operation;

Fig. 3 is a longitudinal section through a completed spool; and

Fig. 4 is an end view of the same.

The embodiment of the invention illustrated comprises a spool as shown in Figs. 3 and 4 having a tube 10 having reduced ends 11 which extend through the end plates 12 and which are riveted or spun over at 13.

In assembling, the tube 10 is held between clamping members 14 and'15 which are recessed to closely fit the tube, the members being secured upon the tube by means of a wedge 16. The members 14 and 15 are slightly shorter than the distance between shoulders on the original tube as shown by Fig. 1 and act as stop means for limiting the distance the plates 12 are pressed in as will later be explained.

The end plates '12 have central openings adapted to fit over the ends 11 of the tube and are countersunk at 12* on the outside to receive the riveted over ends 13 of the tube. With the end plates assembled on the reduced ends of the tube and the clamping members 14 and 15 in place as shown, the spool is placed between dies 17 and 18'which have centers 17 and 18 which extend into the ends of the tube and curved annular portions 17 and 18 for .rounding the ends of the tube and forcing them back into the countersunk portions 16 as the dies are forced inwardly, thereby having these ends flush with the outer faces of the end plates. As the outer ends of the tube 10 are forced out wardly they cause an outward dishing of the end plates 12 and as the dies 17 and 18 continue to move inwardly they encounter the dished plates 12 and force them back toward the members 14 and 15, thereby causing them to resume their flat shape.

At the same time the tube'is shortened by the heavy pressure of the dies but is prevented from buckling by the members 14 and tube 10 are outwardly rounded and tlfi 65 assists in pressing thereinia coreli) of wood or the like, whiclris slightly larger than the internal diameter of the tube 10, as shown in Fig.3, so that after being pressed in the core is so firmly held that it will not loosen 7o even when subjected to oil for long periods.

While I have shown and described but a single embodiment of my invention, it is to be understood that it is capable of many modifications; construction and arrangement may be made without departing from the spirit and scope of the invention as disclosed in the appended claim, in which it is my intention to claim all novelty inherent in my invention as broadly as I claim: I The method of making spools consisting of. placing perforated end plates over the repossible in view of the prior art.

duced ends ofa metal tube, forcing a tapered die into each end of the tube with sufficient pressure to cause said tube to materially shorten, and holding said tube to prevent its bucklinga ARTHUR O. HOPKINS.

Changes therefore in the 75

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