US561166A - Wood rim for cycles - Google Patents

Description

(No Model.) 1 Y W.. H. HERHOLD.

WOOD RIM FOR CYCLES.

No. 561,166. Patented June 2, 1896.

@yl ,EHIIHIH f al i l UNITED STTES PATENT OFFICE.

VILLIAM II. HERIIOLD, OF CHICAGO, ILLINOIS.

woon RIM FoR CYCLES.

SPECIFICATION forming part of Letters Patent No. 561,166, dated J une 2, 1896.

Application filed August 6, 1895. Serial No. 558,367. (No model.)

To all whom. it may concern.:

Be it known that I, WILLIAM H. HEEHOLD,

a Citizen of the United States, residing at Chicago, in the County of Cook and State of Illinois, have invented certain new and useful Improvements in Wood Rims for Cycles; and

form of joint is'avoided.

I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable'others skilled in the art to which it appertains to make and use the same, reference being made to the accompanying drawings, and to the letters of reference marked'thereon, which form a part of this specification.

The object of the invention is to so join the meeting ends of the continuous piece of which the rim is formed that the cement is relieved of any sliding strain, while a complicated My improved joint is a simple splice or scarf with the meeting faces grooved transversely and longitudinally.

In the drawings I show in Figure l a plan view of the strip of which the rim is formed, the ends being prepared for joining. Fig. 2 is an edge view of the same. Fig. 3 is an edge View of the rim after the joint is made. Fig. 4 is a cross-section in the line 4c 4; of Fig. 3. Fig. 5 isthe same view, the rim having been completed. Figs. 6 to IO show various modications in the form of the joint, Fig. 7 being on the line 7 7 of Fig. 6.

The strain upon a cycle-rim of modern form, the spokes being of wire and consequently under great tension, is central, tending to contract the rim. A simple form of scarfed joint in which reliance is placed solely upon the cement to prevent the contact-faces sliding the one upon the other is difficult to maintain, the parts having a tendency to creep. Such a joint is, however, much simpler of construction than a mortised joint, andl in that it is less liable to start a fracture of the ma-Y terial is the best form but for the objection mentioned.

I prepare the strip A of which the rim is formed by obliquely scarng its ends 'upon opposite sides, as plainly shown in Fig. 2, and then channeling or corrugating the scarfed surface with numerous grooves, both transverse and longitudinal, as indicated at CBD. These grooves, whether transverse or longitudinal, may be V-shaped in cross-section, as shown in Fig. 4, or regularly curved, as shown in Figs. 6 and '7, or they may be square in cross-section, as shown in Fig. 10. The strip A bein g bent to a circle the transverse grooves C C come into cooperation and the sections B of the longitudinal groovin g coperate with the sections D.

The tendencyof the rim to contract in diameter by reason of the great strain of the spokes is resisted by the central section of transverse grooves, While the longitudinal grooves at the extreme end of the piece of which the rim is formed prevent the joint from breaking laterally by securely holding the parts Where they must first separate in the event of such fracture.

I am aware that rims have been made with a scarfed joint and also that such a joint has been longitudinally grooved to prevent lateral displacement, and I do not broadly claim such forms.

What I claim as my invention, and desire protection in, is-

A wood cycle-rim formed of a continuous piece bent to a circle and having its ends united by an oblique scarfed joint, a portion of each of the scarfed surfaces having a series of corresponding transverse grooves and a portion thereof having a series of corresponding longitudinal grooves, substantially as described and for the purpose stated.

In testimony whereof I have aiiiXed my signature in the presence of two witnesses.

WILLIAM II. HERHOLD.

Witnesses:

LoUIs K. GILLsoN,' W. C. CoELIEs.

Images