USRE4322E - Improvement in carriage-wheels - Google Patents

Description

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ROBERT W. McCLELLAND, OF SPRINGFIELD, ILLINOIS.

Letters Patent No. 99,691, dated February 8, 187.0; reissue No. 4,322, dated April 4, 1871.

`INIPROVMENI' IN CARRIAGEWHEELS.

l The Schedule referred' to in than Letter! Patent and making yparte of the same.

To all whom it mag/.concern Be it known that I, ROBERT W. MCGLELLAND, of Springfield, in the county of Sangamon and State of Illinois, have invented certain Improvements in Carriage-Wheels; and I declare the following to be a full, clear, and exact description thereof, reference being had to the' accompanying` drawing, in which- Figure 1 is an axial section.

- Ei 2 is a section of the metalbaud when provided. with projections.

` Figure 3 is a cross-section of the wheel.

Figure 4'is a side view of the hub, showing the arrangement of .the dodged spokes and the bands.

Similar letters of reference indicate likeparts in the several drawings.

"This invention relates to that class of carriagewheels in which a woodeufhub is used in connection with a metallic band or ring encircling it on each sident-the row of spokes, forthe purpose of stlangthening the hub and supporting the spokes; an

It consists- First, in the employment of a raised center upon the hub ,in combination with said rings and with dodged spokes; and

` Secondly, in a peculiar construction kof the spoketenonsand hub-mortises, by means of which great strength and durability are imparted to the wheel at that point, and the consequences of the spokes Wearing in/their sockets are obviated to a great degree.

.ln the drawing--v l A represents the hub, of any ordinary shape and construction, except that around it, about midway between its extremities, a portion, 15,is raised so as to afford a longer bearing for the spokes G, which are tenoned therein in two rows, as Ashown in Iig. 4, and alternate with each other, in the manner known as dodged or staggered, the outer edge of the spokes in-each row being about flush with the edge of the raised ring or center B on that side.

' D D are metal'bands fitted around the hub on the outer sides of the s kes, with their inner edges bearing against the spokes and against the vertical sides of the raised center B, and their convex snrace flush with that of the center thus inclosed between them.

The bands are secured upon the hun in any suitable manner, and, if preferred, they may be made with projections, d d,-on their inner edges, adapted to tit into openings, a: as, in the sides of the spokes,

for the purpose of holding thelattermore' firmly in lace.

I)"Ihe inner ends of the spokes C are provided with the usual straight tenons, c, but the shoulders thereof, instead of being square or at right angles to said tenons, are sloped or beveled outward and upward, preferably at an angle of about forty-tive degrees, as shown in iig. 3.

The mortise in the raised center corresponds in size and shape with the tenons and beveled shoulders vof theA spokes, sc that, when thel latter are placed therein, come flush with the periphery of said raisedcenter. The raised center, in combination with the bands and the two rows ot' spokes, arranged as described. constitutes, perhaps, the mostsubstantial and durable hub yet brought before the public.

The operation of the severahparts is as follows:

The raised center gives a longer bearing surface .for the tenons, cansihgwhe hub to hold them with more tenacity and to support a greater lengthof the spoke.

The wood of the hub, being somewhat elastic, grasps and holds the spokes much more firmly than is possible for an iron hub, and driven into the mortise more tightly.

'lhe iron bands keep the wood from splitting, and

also serveV to brace and support the sides ot' the spokes.

The dodging ot' the spokes causes themtovbrace Y fx'omieach side of the central line, forming au arch for the support of the fellies, so that, when the :tires are shrunk on, they will not cause the wheel to dislu It also prevents the mortises from' coming in a continuous line, so that each tenon is surrounded and .supported by a thick, strong wall of wood ou three sides, and a wall 'of wood and metal on .the fourth side.

The peculiar construction of the tenons and be'veled shoulders, inconnectionwith the mortises, as above described, greatly increases the 'strength of '.the spokes, and renders their heretofore weakest part (the point of union withthe hub) the strongest, as, by the angular form of the shoulders and the-corresponding shape of the mortises, an arch is formed of said hub and spokes, each part of which supports and gives strength to the other.

In addition to this advantage the beveliug of the shoulders enables them to wedge more firmly into the mortises when the tire is reset, so that, if some of them. haveworn4 a. little,

left loose, but everyjoint is tightened up and `made the upper edges of saidshoulders be-V permits them to be they are not thereby` as firm and staunch as -when the wheel was new; 2. The combination of the hubA, provided with In "fact the healing surfaces 4atl-this point cannot so the raised center B, the spokes'C G, and the bands wear away that they will not at once fit together D D provided with the pins or studs d d, substanagain and form a perfect joint the moment that the tially as and for the purpose herein set forth;

tire'is reset. ROBERT WQ MCCLELLAND.

Having thus described my invention, l What I desire to secure by Lett-els Patent irsiitnesses: 1. The combination of a wooden hub having a E. B. BINCE,

raised center with dodged spokes and metal bands, .l. C. MATHER..

substantially as and for the purposes setforth.

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