US648657A - Bicycle-frame. - Google Patents

Description

No. 648,657. Patented May '1, I900.

- 0. s. DIKEMAN.

BICYCLE FRAME.

(Application me; Sept. 27, 1899.)

(No Model.) 2 Sheets-Sheet .l

.114: Ncnsns wzrzns co., PHoYaLmio" wnsumn'rou u c 'No. 648,657. Patentd May l, I900.

C. S. DIKEMAN.

BICYCLE FRAME.

(Application filed Sept. 27; 1899.) (No Model.) 2 Shets-Sheeti;

WITNESSES CHARLES S. DIKEMAN, OF TORRINGTON, CONNECTICUT.

BICYCLE-FRAM E.

SPECIFICATION forming part of Letters Patent No. 648,657, dated May 1, 1900.

App i ati n fi September 27, 1899. Eferial No. 731,825. (No model.)

To (LZZ whom, it may concern:

Be it known that 1, CHARLES S. DIKEMAN, of Torrington, in the county of Litchfield and State of Connecticut, have invented certain new and useful Improvements in Bicycle- Frames; and 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.

My invention relates to an improvement in bicycle-frames.

In the bicycles now universally used the transverse tube which supports the crankbearings is built into or between the front and rear sections of the reach and forms an integral part of the reach. In the manufacture of such frames it is absolutely neces sary toleave one joint connecting the rear section of the reach and transverse tube or crank-hanger unbrazed, so that the frame can be put into the lining-up jig in order to bring the several parts into their proper positions, after which this one joint or connection is drilled, pinned, and brazed. This clos ing of the one rear joint after all the other joints have been brazed and the frame properly lined up adds considerable to the cost of manufactu re; and the object of my invention is to simplify the present method of assemblin g and truing the machines without detracting from the efficiency of the finished product; and it consists in making the rear end of the reach or that portion thereof in rear of the crank-hanger separate and independent from the hanger and adj ustably secured thereto.

My invention further consists in the parts and combinations of parts, as will be more fully described, and pointed out in the claims.

In the accompanying drawings, Figure 1 is a View in elevation of my improved hanger, showing the clamps thereon. Fig. 2 is a view in section of the same. Fig. 3 is a view in section through one of the clamps and showing a portion of the frame. Fig. 4 isa View of a modified construct-ion in section through the hanger and clamps, showing the shaftbearings carried by the clamps; and Fig. 5 is a iew of a modified form of clamp.

A represents the front section of the reach,

and B the central brace, both of which are secured to the transverse tube 0 in the usual or any desired manner. The transverse tube C may be shorter than that usually employed on bicycles and need project laterally only sufficiently far to form firm seats or bearings for the clamps or bands D. These clamps or bands are split, as shown, and provided at their split ends with forwardly-projecting lips or flanges a, through which the screws pass for locking the clamps or bands to the tube, and each is provided on its rear face with a rearwardly-projecting lug b, to which the rear stay or rear section A of the reach is secured by brazing. These rear stays constitute the rear section of the reach, and being secured to the adjustable clamps it will be seen. that it will be a comparatively-easy matter to attach and aline up the rear stays or rear section of the reach and the rear fork carried thereby after the front section of the frame has been lined up, and thus avoid the warping or springing of the rear frame, which frequently occurs during the operation of brazing the latter to the front section of the frame.

If desired, I can, as shown in Figs. land 5, counterbore the outer ends of the clamps and secure the bearings F F for the crank-shaft therein. With such a construction the bearings F could be applied to the clamps before the latter are clamped to the tube, and hence would be removable with the clamps.

In Fig. 5 I have shown the clamps or bands each with two rearwardly-projecting lugs for the attachment of two stays such asare shown in my Patent No. 631,282, granted to me August 22, 1899.

It is evident that changes in the form and construction of the several parts might be made Without avoiding my invention, and hence I would have it understood that I do not restrict myself to the particular construction and arrangement of parts shown and described; but,

Having fully described my invention, what I claim as new, and desire to secure by Letters Patent, is-

1. In a bicycle-frame, the combination with the front reach, central brace and rear stays, of a transverse tube having lugs or nipples to which the front reach and central stay are secured, bands secured to the respective ends of said tubes, each band made of a single piece of metal separate from the frame and secured to the ends of said transverse tube, said bands having integral lugs or nipples having the rear stays of the frame secured to them.

2. In abicycle-frame, the combination with the transverse tube permanently fixed to the front section of the reach, of bands secured over the ends of said tube and overhanging said ends, crank-supporting bearings located Within the projecting ends of the bands, and the rear section of the reach secured to said bands.

specification in the presence of two subscrib- 25 ing Witnesses.

CHARLES S. DIKEMAN. Witnesses:

' HAROLD E. MUNsoN,

WILLARD A. OoWLEs.

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