US1143541A - Sheet-metal spool. - Google Patents

Description

E J. HUBBARD.

SHEEI. METAL SPOOL; APPLICATION FILED APR-26.1913.

Patentad 5m 15, 1915.

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EBER J. HUBBARD, F BERWYN, ILLINOIS.

sneer-METAL SPOOL.

intranet.

Application filed April 26, 1913. Serial No. 763,804..

To all whom it may] concern Be it known that I, Ennn .l'. HUBBARD, a citizen of the United States, and resident of Berwyn. in the county of Cook and State of Illinois, have invented certain new and useful Improvements in Sheet-Metal Spools, of which this is a specification.

My invention relates to sheet metal spools or reels particularly adaptable for receiving wire.

My improved spool is of that class in which sheet metal end plates are secured to a sheet metal hub, and among the important objects are to provide improved means for locking the seam edges of the hub securely together after the hub has been bentinto cylindrical form from a sheet metal blank in order that the hub will retain its proper shape and diameter while the end plates are applied and secured to the ends thereof; to provide an annular bead or pocket on each end disk concentric therewith and with a diameter at its apex equal to the diameter which the hub should have in the finished spool the entrance edges of the beads or pockets guiding the ends of the hub accurately to the 'apexes of the beads and contracting the hub ends should the seam edges have separated; to provide teeth on the ends of the hub and to provide slits in the apexes of the beads through which the teeth extend to be welded and fused into the material adj acent the slits; and in general to provide a construction consisting only of a sheet metal hub and sheet metal disks united to the hub in the abovementioned manner to form a practically unitary spool of great strength and rigidity and of very little weight.

In the accompanying drawings Figure 1 is a side elevational view; Fig. 2 is an end View of the completed spool; Fig. 3 is a side View of one of the end plates; Fig.4 is a side elevational view with one end of the hub and the end disk thereon in section and the other end disk removed; and Fig. 5 is an end View of the hub.

The hub is bent up from a rectangular blank 10 (dotted lines) of sheet metal in one edge of which is provided the dovetailed groove 11 and at the opposite edge the tongue 12. The blank is rolled into cylindric form by suitable dies,.the tongue being engaged in the groove to hold-the adjacent edges together and to prevent springing apart thereof, particularly before the hub is Specification of Letters Patent.

Patented June 115, 1915..

applied and secured to the end plates. In order to still more closely lock the edges of the blank together when the hub is formed, 1

the ends 11 adjacent the s ot 11 are punched While the hub is still in the die in order to force the metal of these ends into the corners 12 at the base of the tongue, the edges of the hub being then closely held together so that they cannot spring apart and also to prevent relative longitudinal displacement of these edges. The blank also has notches 13 cut therefrom to leave rectangular teeth 14 at the ends of the hub.

The end disks 2 and 7) from a circular disk of sheet metal. The metal 15 adjacent the central hole 16 is deare each formedup k flected inwardly a distance to form a bearing for a supporting shaft for the spool and concentric with this central opening and extending outwardly is the annular head or ridge 17, the internal width of this bead adjacent its apex being substantially that of the thickness of the metal of the hub and the diameter of the bead being the same as that of the hub. Cut through the apex of the bead are the arcuate slits 18 for receiving the teeth 14: on the hub. When the end disks are now applied to the hub the teeth 14% 6X- tend through and a slightdistance beyond the slits 18 and the bases of the slots 13 on the hub engage against the inner face of the bead apex, the hub being then at'perfect right angles with the end disks. The hub ends by engaging with the rounded entrance edges 19 and 20 of the beads upon application of the end disks are drawn together if for any reason the edges thereof have sprung apart sothat the hub enters the apeXes of the beads with its seam edges held closely together, the seam edges at the central portion of the hub being held together by the tongue and groove connection 11 and 12. Thus after the end disks are applied to the hub, the hub seam edges will be held closely together along the entire length and the end 10% disks will be at perfect right angles with the hub and will retain this position during further treatment of the spool. The ends of the teeth 14 projecting outwardly beyond the beads are preferably welded and fused to 1% 1 also no danger of displacing the right-angled arrangement of the disks with reference to the hub as the welding is by flame and no force whatever isappIied to the parts during such welding. The tongue and groove connection 11 and 12, of which there may be one or more depending upon the length of the spool, will prevent relative longitudinal movement of the adjacent edges of the hub seam and will thus greatly strengthen the spool against torsional and other strains.

In order to strengthen the outer portions of the end plates, these plates are curled over at their peripheries as indicated at 21; In

order that the spool may readily be turned when wire is to be applied thereon the periphery of one of the disks is formed to provide a belt groove 22. The disks have also small inner and outer holes 23 and 24 respectively for receiving the ends of the wire Wound on the spool. V

The spool after the welding operation is practically a unitary structure of great strength and rigidity yet of very light weig I do not of course desire to be limited to v the precise form and construction as changes 2. A-spool or reel comprising a hub and end disks secured thereto, said hub being bent into cylindrical form from a sheet metal blank having at its one end a dove-tailed tongue and in its other end adove-tailed slot, said tongue and slot interlocln'ng'l'y engaging when the edges are brought together to form a hub and preventing relative displacement of the edges-- In witness whereof, I hereunto subscribe my name this 22nd day of April, A. D., 1913.

EBER' J. HUBBARD. Witnesses:

CHARLEs J. SCHMIDT, EDMUND G. INGERSOLL.

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