USD32700S - Design for a crank-arm for velocipedes - Google Patents

Description

D12-123. OF D 32q700 EX DESIG N.

No. 32,700. Patented May 22, I900.

W. H. FAUBER &. A. M. PRICE.

CRANK ARM FOR VELOCIPEDES.

(Application filed Apr. 20. 1900.]

UNITED STATES PATENT OFFICE.

WILLIAM II. FAL'BER ANT) ALBERT M. PRICE, OI CHICAGO, ILLINOIS.

DESIGN FOR A CRANK-ARM FOR VELOCIPEDES.

SPECIFICATION forming part of Design No. 32,700, dated May 22, 1900.

Application filed April 20,1900. $eria1No. 13,673- Term of patent 14 years.

To all whom it may (mum/w:

Be it known that we, WILLIAM H. FAUBER and ALBERT M. PnIoE, citizens of the United States, residing at Chicago, in the county of Cook and State of Illinois, have invented and produced a new and useful Design for a Crank Arm for Velocipedes, of which the following is a specification, reference being had to the accompanyingdrawings, formingpart hereof.

As shown in the drawings, Fign re 1 is a side elevation of a Cltllk 3,l'il1 embodying our design. Fig. 2 is an edge view of the crankarm. Fig. 3 is an inside elevation thereof.

The leading or characteristic features of the crank-arm made in accordance with our design are as follows:

The crank-arm is made smaller at its outer than at its inner end, where it joins the crankshaft, and tapers from its inner to its outer end. The outer side or face of said arm is composed of three plane surfacesnamely, an intermediate surface and two exterior or lateral surfaces. Said intermediate surface is widest at the outer end of the arm, extending the full width of the arm at the said outer end thereof, and tapers gradually toward the inner end of the arm. At said inner end of the arm the margins of said intermediate surface are brought together, or nearly so. The lateral or exterior flat surfaces of the arm are oblique with respect to the central intermediate surface thereof, are arranged symmetrically on either side thereof, are widest at the inner end of the arm, and taper gradually toward the onter end thereof, where their side edges meet, or nearly so, in the plane of the side or edge faces of said arm. The side margins of said lateral oblique surfaces meet or coincide with the side margins of the intermediate surface, so as to form two angles at either side of said intermediate surface, extending the full length of the crank-arm.

The side faces or edges of the arm are each provided with fiat or plane surfaces extending the full length thereof. Said flat edge surfaces are widest at the outer end of the arm, where they are equal in width to the thickness of the arm, and taper from the outer to the inner end of the arm, where their side edges meet or nearly meet. The outer side margins of said fiat edge surfaces meet or c0- incide with the outer margins of the oblique fiat surfaces of the outer face of the arm, so as to form two angles at either side of said outer face, extending the full length of the arm.

On its inner face the arm is convexly rounded, with a varying degree of convexity from its outer to its inner end. At its outer end it is flat or only slightly rounded, while at its inner end, adjacent to the shaft, said inner surface has a maximum degree of convexity. The rounded inner face of the arm intersect-s at its wide margins the fiat tapered edge surfaces thereof at angles to the latter, meeting the inner tapered or oblique margins of said side or edge faces at well-defined angles, so that the said flat edge faces are clearly and accurately defined.

The rounded inner surface of the arm intersects the cylindric surface of the shaft and is joined or merges into said cylindric surface.

What we claim as new is- The design for a crank'arm for velocipedes substantially as herein shown and described.

Signed at Chicago, Cook county, Illinois, on the 10th day of April, A. D. 1900.

\VILLIAM II. FAITUFIR. ALBERT M. PRICE.

In presence of GERTRUDE BRYCE, Dono'rnr MnRiIoN.

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