US 1573238 A
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Description (OCR text may contain errors)
Feb. 16 19.26.
- 5. H. FORSYTH DI SK WHEEL Filed March 5,- 1922 orms p, o H a er in.
GEORGE E. FOBSYTH, OF CHICAGG, ILLINQIS, ASSEGI TOB T0 MOTOR WHEEL 30.1% YORATIOIQ', OF LANSING, MICHIGAN, A CORIPQRATIOH G MICHIGAN.
Application filed March 3, 1922. Serial rl'o. 540.67 3.
usual sheet steel disk, without in ipairment' of strength tinder dead load, resistance to deforming stresses in'road use, and life and efficiency under Weather conditions and attack of the elements; all accompanied by a reduced cost of production, the elimination of noises due to resonance and an enhanced adaptabilityboth to heavy commerical and light pleasure cars. I accomplish this object by the employment of a disk having a substantially lower coefficient of elasticity than sheet steel, advantageously of nonmetallic material and preferably, of organic fibrous material in the form of laminated wvood with the grain of the different layers disposed angularly, or pulp board, or a com bination of such materials with or with out a reinforcing inlay of steel interlocked with the other material; and I shape the disk and so assemble the same with the hub and rim as to place and maintain the disk under radially reacting stress, whereby to strengthen and reinforce the same against deformation by strains of use acting in the plane of the Wheel or laterally thereof.
' lln order that the invention and its use may be readily understood by those skilled in the art I have set forth several embodi- .ments of the same in the accompanying drawing and in the following detailed. description predicated thereon. It will be understood that-the principles of the invention are adaptable to other varied e1nbodiments without sacrifice of their mate rial advangtages, Wherefore the drawing and description are not to be taken in an unnecessarily limiting sense but as rather illustrative of the invention.
in the drawing, Figs. 1 to 'i' inclusive ropresent in radial section fragmentary portions or disk Wheels embodying the invention.
in 2, 3 and the disk is illustrated as comprising multiple sheets 11 of wood.
preferably seciu'ed thereto in any suitable manner, although they may be independent of each other and shaped in the process of forming so as to lie in intimate contact throughout their eittent.
In Fig. 6 the'dilr is shown as comprising multiple sheets 13 of organic fiber such as wood pulp having imbedded therein an inlaysheet 14 of steel which is advantageously foraminous being provided at spaced intervals with holes 15 by means of which the steel inlay and the fibrous sheets 13 are interlocked. It will be understood that there may be any desired number of successive layers of metallic and noumetallic sheets constituting the disk.
Havingreference to Fig. 7 the disk is shown as comprising "sheets 16 which may be of non-metallic or metallic nature, but preferably of sheet steel. In this instance the component sheets 16 are out of parallelism, adjacent the Wheel periphery and in its intermediate portion for a purpose which will be more clearly defined hereinafter.
It will be understood that the sheet materials employed as component parts of the disk, other than the inlays 12 of Fig. 5 and 14 of Fig. 6, have a decidedly lower co-eiii'cient of elasticity than has steel such as has been heretofore employed in the malting of disk Wheels, and such materials also possess in a less decree the property of resistance to deformation. l have found that while such materials are ordinarily not adapted to withstand the strains to which automobile Wheels are subjected, yet when assembled with the hub and with the rim in such manner as to place and maintain the disk under" decided stress acting radially, the elasticity andresistance oi such materials is highly augmented and the Wheel as a Whole has a strength -am ly suliicient to meet all requirements in this relation.
In 1 and l the component sheets of the disk are forwardly arched at the hub is greatly enhanced.
shown as occap .clined relation to each sembled by a Wedging action exerted by the portion indicated by the reference numeral l7 when assembled with the hub by mm 5 0'! the bolts 18 are flattened to a con: noble degree whereby the force appl ed lat lily y the bolts reacts rad ally and stresses the same against the force exerted by the peripheral portion/pf the dish.
In aliloi the figures of the drawing means of asembling the rim 19 with the periphportion of the dish acts through for ro laterally applied and reacting inwardly in a direction toward the hub to stress not only the intermediate portion of theydisk but also the peripheral portion 20 thereof. Vihether this deforming}; force is applied at the hub disk throughout its aree. is subjected to and muintainedlmder radial stress and its force of resistance to and recovery from strains in. Fig. 7 this stressing of the disk is further manifested in cousin 1 a Wider separation of the sheets in their intermediete portion. and, advantageously, the rear huh plate 21 and the backing plate 22,
'normeily spaced fromthe rear sheet 16 serve as lateral ahutmcnts to the disk when sprung to the position shown in dotted lines at lti As a means of assembling the disk with the rim end stressi" g the same by inward radial reaction various expedients may be employed as for instance:
In Fig. 1. an annular folly member 23 1s ing a position to encompass e peripheral. portion 20 of disk, the two normally having an inother and being as and constrict ti th e not end the head 25 of the bolts 26. To distribute the effect ofthe bolt head 25 and prevent rupture of the disk 11 a. wide washer 27 is employed beneath the bolt head. The rim 19 is then asembled upon the telly 23 by means of the shim 28 which may be annular or divided into a number of incividuel shims and held adjustably in place by means of the nuts 29. The rim is interlocked with the Belly by the usualdriving lug 30. In this form of construction also the disk is shown as anchored to the hub plate 21 by bolts 81 having cooperweshers 27 bearing upon the concave face of the disk.
in Fig. 2 a similar telly member 23 is employed the section being taken at the valve stem rather The peripheral portion 20 of the diskis slotted as shown at 20 and. the folly memher is also slotted as indicated at 23*, to enable the rim with its associated tire and valve stem 32 to be withdrawn by a horizontal movement to the front thr0ugh,the slots end 23. i
li e sheep is; Fig. 3; the peripheral poror at the periphery or both, the
than at the driving lug.
tion of the disk is not deflected to the rear biit the folly member 33 overlies the of the disk and the rim 1? is assembled therewith by a wedging action exerted by the bolts 534i resulting the stressing of the wheel.
In Fl 4 the folly member 35 has a. relation to the disk somewhat similar to that s own in Fig. 3, but the stressing of the disk under the constrictive reaction of the rim is effected by means of a shim member 36 having a. wedge. portion 3 forced between the folly member and the rim by means of the bolts 38.
In Fig. 5 the laterally deflected peripheral portiongof the disk underlies the telly the peripheral portion 20 of the dish: is,
laterally disposed at a slight incline to the horizontal and the stressing of the dis: is accomplished by the wedging action of the rim surface 42 undertho force applied to the rim flange 43 by the bolts 44:.
According to Fig. 7. the two independent sheets forming the disk, Whether of steel or other material, present inclined etc 5 20, 20 and 20 upon which inclined portions of therim are respectively forced by means of the shim 45 under the presshre'of the bolts 46. These bolts ltl at the same time tend to force togetl'ier the locally separated sheets whereby more intimate contact is ob tained inwardly and outwardly of the bolts and the stressing effect assisted.
It- Will be noted that the holes in the diiks about the several bolts are larger "thenis strictly necessary to receive the colt-s. This permits the accommodation of bolt to disk as the latter shifts slightly under the stressing action when the bolts are tightened.
While in each of the ligilres have shown an assembly of the disk with the hub and peripheral portions of the Wheel which places and maintains the disk under stress, it will be understood that for some purposes this supplemental disks would not be required the he tion is not to be considered as necessarily an association of the two ideas dish construction and wl'ieel assembly as the one has elements of decided value independent of the other.
I claim: I
1. In a Wheel, the combination with the hub portion and the tire-cerryin peripheral portion"; of an intermediate portion comprising sheet material have a co-elllciezit of elasticity substantially lower than steel.
the said dish assembled with the hub and,
2. In a wheel, the combination with the hub portion and the tire-carryin portion, of an intermediate fisk portion comprising a sheet of non-metallic material vti radially yieldable and maintained under radially acting stress in assembled relation with the other portions of the wheel. 3. In a wheel, the combinationwith the hub portion and the tire-carrying peripheral portion, of' an intermediate disk portion comprising a plurality of sheets of material having a co-efficient of elasticity substantially lower than steel, the wheel radius hav-- ing an ogee curvature substantially throughout the diskarea.
4. Inc. wheel, the Combination with a hub portion and ,the tire-carrying eripheral I portion, of an intermediate dishe disk portion comprising a plurality of reversely curved'sheets of fibrousmaterialarran ed in contact substantially throughout the isk' area. v
5. In a wheel, the combination of the hub portion and the tire-carrying peripheral portion, of an intermediate disk portion presenting a serles of concentric convex and concave zones and comprising a plurality of sheets, including sheet-sot wood arranged 6 .with the grain in intersecting relation.- 3
6. In a wheel, the combination with the hub portion and the tire-carrying peripheral portion, of an intermediate disk portion comprising 'a plurality of sheets, including sheets of organic fibrous material, the com"- ponent disk-sheets disposed in contactsubstantially throughout the disk area, said peripheral disk yieldablc'radially and assembled with the hub and rim portions of the wheel under radially re-acting stress.
7 A. dished wooden disk wheel having an annular reversely curved zone between its provide a forwardly concave zone adjacent the hub portion and a forwardly convex zone adjacent the periphery.
11. A disk body for wheels formed of non-metallic material reversely curved to provide a forwardly concave zone adjacent the hub portion and a forwardlyconvex zone adjacent the periphery, the disk crossing the plane of impact-of the wheel intermediate its center-and periphery.
12A wheel comprising a disk body formed of'non-metallic material and having a forwardly concave zone intermediate its center and periphery, .in combination with a metal rim forming a constrictive member about the periphery of the wheel body.
In testimony whereof I have hereunto signed my name.
GEORGE H. FORSYTH;