US 1409213 A
Description (OCR text may contain errors)
E. E. EINFELDT.
APPupAUoN FILED Novl 3. 1919.
1 ,409, 2 1 3 Patented' Mar. `14", 1922.
EMV 11 N :UNITED STATES PATENT oFEicE.
EitNEs'r E. EINEELDT, 0E DAVENPORT, iowA, A*AssierNoia-iro er.r WATSON FRENCH,
NATHANIEL FRENCH, JOSEPH L. HEOHT, AND, W. H.
STACKHOUSE, 0F DAVEN- PORT, IOWA, ('JO1V.\I}?OSI1\TGy FIR-M OF FRENCH & HECHT.
`iiiE'iHon oEiviAxrNe WHEEL HUBS.
Orig'inalA application filed April 15,
This invention relates to the manufacture l of tubular Vmetal wheel hubs, more particularly of the form in which a circumferential groove or spoke chamber is provided to receive the heads 'on' the inner ends of the spokes, by which the latter are rivet-ed to the hub, the object ot the invention being to provide a hub of great strength"anddurability which will withstand' the severe strains imposed upon' it inthe use of the wheel, especially atthe points wherethe spokes `are secured to the hub Vith these ends .in view my invention consists ot an improved metliodot' forming the hub. in which method a plate or Vblank is coiled or bent'on itself `into cylindrical form and the convolutions are caused-.to interlock .with-v each other by interftting protuberances and cavities on the respective convolutio'ns, whereby there is formed a reintorcedspoke chamber on the interiorot' the hub` The interlockingr of the convolutions may be brought about in various 'ways'. For instance, the blank may be provided with a groove in one side and a corresponding rib orv pro'ti'iberan'ce on the other side and coiled on itself to cause the protuberance on the inner convolution to register with and seat on the groove on the next outer convolution; or the grooves and protuberances may be formed and caused to linterlock at the same time that the blank is coiled; or again the grooves and protuberances may be formed and cause to interlock after a plain blank has been coiled into cylindrical form.
I prefer however to adopt the first plan mentioned, and in the accompanying drawings I have illustrated a forni of blank suitable for the purpose. It will be understood `however that the invention is not limited to y'Specificatien of I .eteisraptentl Patented Mar. 14C, 1922.
1919, Serial No. 290,276. Divided and this application filed November 3,-1919. Serial No. 385,494. y
this-particular plan, but in its broader scope as claimed, the-invention embraces as well the alternateplans above mentioned.
In the accompanying drawings:
Fig. l is a plan view oi' a blank for iorming ahub in-accoi-dance with the preferred manner of carrying out my improved method.
Fg. 2 is `a longitudinal section through the completed hub produced by mymethod, the spokes being shown as riveted thereto.
F ig. 3 is an end view of the same, with parts broken away.
Fig. t is an edge view ot' the blank of Fig. l.
- Referring to the drawings YIn the accompanying drawings I have illustrated my invention as applied to the formation of a hub having two circumferential-spoke chambers to receive the heads on the inner ends of two rows or ranks of spokes, but it will be manifest that the invention is not limited to the formation of a hub ot this iorin, but it is applicable vas well to a hub formed with but a single circumicrential chamberto receive a single row or rank oit-spokes.
In carrying my invention -into effect, in connection with a hub ot thev form illustrated, I provide a iiat metal plate or blank l. having therein two straight parallelV` groovesl 2 formed by bending the metal of the blank outwardly in two `parallel lines `or areas. and therebyproducing on the opposite side ot the blank, two ribs or protuberances 3 corresponding in location toa the grooves. The blank thus formed is next, by suitable means or instrumentalities, bent or coiled upon itself into cylindrical form, thereby producing a number ot' convolutioiis or layers arranged one within the other, there being in the present instance two convolutions, an inner one l and an outer surrounding one 5 as shown in Figs. 2 and 3, which eonvolutions have circumferentially extending inner grooves and corresponding circumierentially extending outer protuberances. In the coiling or bending operation, these grooves and protuberances are caused to register with each other in the successive convolutions, the protubera-nce on the inner convolution seating in the inner groove on the surrounding next outer convolution, thereby interlocking the two convolutions with each other. As a result of this mode of procedure, a cylindrical hub structure is produced having on its interior circumferential grooves or spoke chambers, which in the Vcompleted wheel will receive the heads 7 on Welding the contiguous surfaces of the convolutions; or dependence may be placed on the connection of the spokes thereto,y which spokes, as shown, are extended at their in@ ner ends through registering openings in the two convolutlons, and are riveted to the vsame by the inner heads 7 before alluded to, and' outer shoulders 9, which latter bear against the outer side of the outer coil.
The hub structure formed as above ASet forth, being made from sheet or plate metal, is economical to manufacture, and by reason of the several convolutions or layers of material surrounding each other, and the inter-l litting of the grooves yand protuberances, a
structure of great strength and resistingV properties is produced.V
It vvill be obvious that in forming a hub to accommodate but a single rovv of spokes, the procedure Would be the same as that set forth above, except that instead of the blank being formed with two grooves and corresponding'protuberances, it Would have but a single groove and a correspondingk protuberance.
' Instead of forming the spoke chamber as a contlnuous circumferential groove, 1t may be made up of a number of cavities and corresponding protuberances to receive the'ends of the individual spokes, and the convolutions caused to interlock with each other by the fitting of the protuberances on an inner VWheel hubs convolution in the registering cavities on a surrounding convolution.
Having thus described my invention, what I claim and desire to secure by Letters Patent is as follows: u
1. The method of making tubular metal Wheel hubs, Which method consists in providing a blank, forming a cavity in one side thereof and a corresponding protuberance on Athe other side,coiling said blank on itself to cause the protuberance on aninner convolution to seat in the cavity inFthe' surrounf ingconvolution to interlock said convolutions with each other and thereby form a reenforced spoke chamber on the interior Vof the hub,'and\fastening said co-nvolutions together in their interlocked relations to preserve the tubular form of the same.
2. The method of making vtubular metal Wheel hubs With circumferential spoke chambers, Which method consists in providing a blank, forming a groove in one side thereof and a corresponding protuberance on the other side, coiling said blank on itself to cause theprotuberanceon an inner convolution to seat in the groove in the surrounding convolution and thereby interlock the convolutions with each other to produce a circumferential spoke chamber on-the interior of the hub, and fastening said convolutions together to preserve the tubular form ofthe hub.
3. The method of making tubular metal With circumferential spoke chambers, which method` consists in providing a blank, forming a groove in` one side thereof extending throughout the length of the blank and a corresponding protuberance on the other side, coiling said blank on'its'elf into cylindrical form to causeV thel protuberance on an inner convolutionto seat'in a groove on the nextY outer convolution, thereby interlocking the convolutions ivith Veach other and producing a. circumferential spoke chamberV on the interior of the hub, and fastening said convolutions togetherl to preserve the tubular form of thehub,
In testimony whereof, signature hereto.
l have aiixed mv