US623680A - miller - Google Patents

Description

No. 623,680. Patented Apr. 25, |899.

D. H. MILLER. vELoclPEnE GEAR.

(Apphcat on led D c 15 1897) 2 Sheets-Sheet l.

(No Model.)

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Patented mpi. 25, |899.

D. H. MILLER.

VELUCIPEDE GEAR.

(Application led Dec. 15, 1897.!

2 Sheets-Sheet 2.

(No Windel.)

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DAVID II. MILLER, OF CHICAGO, ILLINOIS, ASSIGNOR TO THE AMERICAN CI'IAINLESS WHEEL COMPANY, OF SAME PLACE.

VELOClPEDE-G EAR.

SPECIFICATION forming part of Letters Patent N 0. 623,680, dated April 25, 1899.

Application tiled December 15,1897. Serial No. 661,967. (No model.)

To au whom. it may concern:

Be it known that I, DAVID II. MILLER, a citizen of the United States of America, residing at Chicago, in the county of Cook and State of Illinois, have invented certain new and useful Improvements in Velocipede-Gears, of which the following is a specification.

My invention relates to certain improvements in gears for velocipedes in which it is desirable to mount the cranks upon or adjacent to the journals of the drive-wheel and at the same time gear up from the crank shaft or shafts to the drive-wheel to give the latter greater speed than the former.

The invention consists in certain devices relating to the mounting and gearing of the drive-wheel and cranks, which will be described in their preferred form and arrangement and the essential features of which will be pointed out in the claim.

The drawings contain ten figures, ot which Figure lis a side elevation of one of the many forms of velocipedes to which my invention may be applied. Fig. 2 is a vertical transverse section in line 2 2 of Fig. l. Fig. 3 is an enlarged side elevation of one of the crankhangers. Fig. 4 is a horizontal section in line 4 4 of Fig. l. Fig. 5 is a section in line 5 5 of Fig. 6 and shows the drive-wheel hub, axle, and journals. Fig. 6 is a side elevation of the same. Fig. 7 is a view similar to Fig. 3, showing the opposite side ot' the hanger shown in the former igure. Fig. S is a vertical section in line S S of Fig. A2. Fig. 9 is a detail side elevation showing the connection of a portion of the frame with the crankhangers, and Fig. 10 is an end elevation of the same. y

Referring to the drawings, A A' are two hanger-plates rigidly supported by the frame of the machine and each containing a preferably central opening a and a slot a', the opening being shown as screw-threaded and the walls of the slot as containing a V-shaped groove. A bearing collar B is externally threaded to it the opening a and is secured in said opening and held therein against rotation by a jam-nut l). An internal gear C is secured upon the crank-shaftD, (here shown as threaded thereto,) and is locked by means of a jam-nut d. A covering E, having a central perforation adapted to receive the crankshaft, is placed upon said crank-shaft before the internal gear is secured thereon. The crank-shaft is then inserted in the bearingcollar B. Said bearing-collar has formed in it bearing-cups b b'. rIhe. nut d has a cone d corresponding to one of the cups. A nut d2, threaded upon the inner end of the crankshaft, has a cone corresponding to the other of the cu ps, and said nut d2 is locked in proper adjustment by means of a jam-nut d3.

In the slot a, having the grooved walls, is placed a slide F, which is shown in side elevation in Fig. 6 and in its proper place in the hanger-plate in Fig. 3. The edges of the slide are fitted to the grooved walls of the slot, and upon the inner surface of said slide is a lug f, extending laterally beyond the slot and secured to a pair of lugs a2 a3 (see Fig.

v7) upon the inner side of the hanger-plate by :means of the screws G G. (Shown in Fig. 3 in dotted lines.) The upper end of each of the slides F has an inwardly-extending boss f', shown by the two intersecting sections seen in Figs. 2 and 5, and in this boss is formed a bearing containing two ball cups or races f2. The axle 7L of the drive-wheel I-I bears a cone h, corresponding to one of the cups f2, and said axle extends through the boss f and has threaded upon it a pinion h2 in mesh with the internal gear C and bearing a cone corresponding to the other of the two cups f2. Suitable balls are provided in the bearing,and the pinion h2 is secured against rotation on the axle 7L by means of a jam-nut h3. The boss f also serves as a pivot to hold the rear extremity of two braces O P, extending back from the front portion of the frame, said braces terminating in av common block o, having a removable end piece or yoke 0.

The frame shown in the drawings is so constructed that certain members of the same have a limited oscillating movement with respect to the other members, this being accomplished by pivoting certain members of the framework together, as is clearly illustrated in Fig. 1, and specifically described in my pending application for United States patent for improvements in bicycle-frames iiled December 15,1897, and given Serial No. 661,966.

The specific form and arrangement of the IOO various devices are not essential to the invention, broadly considered, inasmuch as more or less variation is possible without departing materially from said invention.

I claim as new and desire to secure by Leta cover secured to the hanger-plate and inclosing both of said gears, suitable ball-races in the bearing-collar, a cone threaded upon the shaft and holding the internal gear in place thereon, a second cone adjustably clamped upon the opposite end of the shaft and suitable balls adapted to said races and said cones; substantially as described.

In witness whereof I have hereunto set my hand, at Chicago, in the county of Cook and State of Illinois, this 7th day of December, A. D. 1897.

DAVID II. MILLER.

lVitnesses:

S. F. KLoHs, Il. BITNER.

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