US709380A - Frame for motor-bicycles. - Google Patents

Description

Patented Sept. t6. I SGZ.

FRAME FDR MOTOR BICYGLES.

(Application led. Apr. 1902.)

(ud Model.)

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W/TNESSES A A/EYS` i UNITED STATES ATENT ERICE.

GEORGE WAGNER AND BURNEY BYRON BIRD, or s'r. PAUaMiNNEsoTA.

FRAME FOR Moron-BICYCLES.

SPECIFICATION brming part of Letters :Patent No. 709,380, dated September 16, 1902.

Vp .Application filed April 5, 1902. Serial No. 101,520. (No model.)

To all whom it may concern:

)Be it known that we, GEORGEWAGNER and BURNEY BYRON BIRD, citizens of the United States, and residents of St. Paul, in the-county of Ramsey and State of Minnesota, have invented a new and Improved Motor-Frame and Fork for the Same, of which the following is a full, clear, and exact description.

Theinvention relates to motor-cycles, such as motor-bicycles, bicycles, and other polycycles; and the object of the invention is to provide a new and improved motor-frame and fork for the same arranged to carry the motor in a loop immediately back` ofthe front wheel and below the centers of the wheels within a short distance of the ground, to distribute the weight of the motor equally between Jthe wheels, and to allow proper and easy steering ot' the machine, at the same time protecting the'rider from the oil and heat of the motor. l

The invention Vconsists of novel features and parts and combinations of the same, as will be more fully described hereinafter, and then pointed out in the claims.

A practical embodiment of the invention is represented in the accompanying drawi u gs, forming a part of this specification, in which similar characters of reference indicate corresponding parts in all the views.

Figure 1 is a side elevation of the improvement. Fig. 2 is a plan View of the same. Fig. 3 is a front elevation of the same, and Fig. l is an enlarged transverse section of the improvement on the line 4 4 of Fig. 1.

The motor-frame consists, essentially, ofa diamond-shaped body formed by the upper brace A, the center brace B, the front lower brace C, the rear lower brace D, and the rear upper brace E, the said upper and lower braces A and C being rigidly secured in the usual manner tothe steering-head E. The lower end of the center brace B continuesin aloop G, extending from the center brace downwardly, forwardly, and-upwardly, ti nally terminating in a curved arm G', rigidly secured to the steering-head F immediately below the connection of the lower front brace C with the said steering-head.

The loop G is approximately semicircular in shapeand is provided with lugs Il for se- -brace D.

The fork for the motor-frame is provided with double members K and K', the inner members K terminating in the4 front forkcrown L, in which is secured a steering-post N, mounted to turn in the usual manner in the steering-head F. The outer fork members K lie close to the inner members K and are rigidly secured to a lower crown-plate O,

brazed or otherwise fastened to the crownplate L, and the upper ends of the said members K are secured by bolts P to a top crownplate Q, screwed on the upper threaded nut of the steering-post N, a gain-nut R being employed to lock the said upper crown-plate Qin place after the same is screwed on the' steering-post N.

The members K and K of the fork sides are preferably made tubular or almondshaped in cross-section. The arm G of the loop G is preferably in the form of a segment, the center of which lies in the axle-opening of the fork members, so that the arm G' conforms to the rim of the front wheel.

"When it is desired. to place the fork in position on the steering-head F, it is necessary to remove the bolts P and detach the upper crown-plate Q` s0 as to allow of pushing the steering-post N into the steering-head F, after which the upper crown-plate Q is screwed on the` steering-post N, and then the bolts P are employed to attach the outer members K to the upper crown-plate Q.

By the arrangementdescribed a very strong and durable motor-cycle frame is provided, which accommodates the motor in such a manner that the motors weight is equally distributed between the wheels, and the motor is below the centers of the wheels and near the ground to allow of easy and convenient turning of the front steering-wheel in the proper direction. The fork is greatly reinforced by the outside members K, extended IOO upon the sides of the steering-head and connected by two crown-plates to the steeringpost.

The principal parts of the frame and fork are preferably made of heavy-gage seamless tubing and are connected by outside forged joints to insure great strength. The lower end ofthe steering-post is preferably plugged up, as indicated in Fig. 4.

Having thus described our invention, we claim as new and desire to secure by Letters Patentl. A motor-cycle frame, having a diamondshaped body, and an integralloop for supporting the motor, the loop extending below the lower front brace and forming a downward continuation of the center brace, as set forth.

2. A motor-cycle frame, having a diamondshaped body, and an integral loop for supporting the motor, the loop extending below the lower brace and forming a downward continuation of the center brace, the said loop terminatingat its front end in an extensionarm rigidly connected with the steering-head of the said body, as set forth.

3. A motor-cycle frame, having a diamondshape'd body, and an integral loop for sup-` porting the motor, the yloop extending below the centerbrace and forming a downward continuation of the center brace, the said loop being hollow and provided with an inlet and an outlet for the exhaust to pass through the loop, as set forth. f

4. A motor-cycle frame, havinga diamondshaped body, and a loop for supporting a motor, the loopA extending below the lower front brace and provided with an extension secured to the steering-head, said extension being curved to conform to the rim of the front wheel, as set forth.

5. A steering-fork for a motor-cycle frame, comprising a front-fork crown, a steeringpost mounted in the crown, front-fork sides, each made of two members of which the inner members are integral with the said frontfork crown, and crown -platesl carryi-ng the outer members of the fork, the lower crownplate being rigidly secured to the crown and the upper one detachably secured to the steering-post, as set forth.

6. A steering-fork for a motor-cycle frame, comprising a steering-post, front-fork sides, each made of two members, of which the inner members are secured by a crown to the steering-post, and crown-plates, of which one is rigidly secured to the outer members and 1o the said crown, while the other crownplate is removably attached to the outer members and tothe steering-post, as set forth.

7. A steering-fork for a motor-cycle frame, comprising a steering-post, front-fork sides, each made of two members, of which the inner members are connected by a crown to the steering-post, crown-plates, of which one is rigidly secured to the-outer members and to the said crown, and the other upper crownplate screws on the steering-post, and bolts for .securing the upper crown-plate to the upper ends of the said outer members, 'as set forth. 4

8..A motor-cycle frame and steering-fork therefor, comprising a diam ond-shaped body, an integral loop for su pporting the motor, extending below the lower brace and forming a downward continuation of the center brace,

the said loop having an extension-arm rigidly s connected withvthe steering-head of the said body, a steering-post mounted to turn in the said steering head, front fork sides, each made of two members, of which the inner members are connected by a crown with the said steering-post, and crown-plates, of which one is rigidly secured to the outer members and to the said crown, and the other crownplate is detachably secured to the upper ends of the outer members and the said steeringpost, as set forth. 4

In testimony whereof we have signed our names to this specification in the presence of two subscribing witnesses.

GEORGE WAGNER. BURNEY BYRON BIRD. Witnesses:

KARL HAMMERBACHER, W. V. BoLLoM.

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