Improvements in Sprocket Wheels and Gearing for Cycles and other Machinery.
Year: 1898

page_text: PROVISIONAL SPECIFICATION.
Improvements in Sprocket Wheels and Gearing for Cycles and other
Machinery.
We, LEWIS CLEAVELAND CARY, Inventor, THOMAS HENRY CONKLIN, Real Estate
Agent, and CHARLES ROBERT MOREHEAD, Banker, all of El Paso, Texas, United
States of America, do hereby declare the nature of this invention to be as follows:-
The object of this invention is to provide a neat form of gearing for cycles and
other machinery, by which increased speed can be attained without an appreciable
increase of power required.
Our improved gearing, as applied to cycles, is most conveniently combined with
the sprocket wheel on the crank-shaft, but when used for other machinery, the
sprocket may be replaced by any other wheel, such as a pulley, cog-wheel, or
vehicle wheel.
By this invention the crank or the like means for applying the power has a
pinion attached to it or to its shaft upon which the sprocket wheel-which is hollow
and formed of a disc having a broad peripheral flange-is also mounted to turn
freely.
The pinion afore-mentioned, gears with pinions of smaller diameter formed
integral with and at the side of larger tooth wheels arranged equi-distantly around
the crank pinion. These wheels-preferably three in number-gear into teeth
on the inner periphery of a ring which has teeth on its outer circumference also.
The teeth on the outer circumference of the ring gear into pinions formed integral
with and at the side of tooth-wheels, arranged equi-distantly between the three
similar wheels afore-mentioned and gearing into teeth on the inner periphery
of the sprocket or other wheel.
The sprocket wheel is fitted with a cap or cover, consisting of a disc, centrally
perforated to pass over the crank shaft, and secured by screws, to the side face
of the peripheral flange of the sprocket wheel.
F
L
T
1000
R. RAINSFORD,
Agent for Applicants.
> Improvements in Sprocket Wheels and Gearing for Cycles and other
Machinery.
We, LEWIS CLEAVELAND CARY, Inventor, THOMAS HENRY CONKLIN, Real Estate
Agent, and CHARLES ROBERT MOREHead, Banker, all of El Paso, Texas, United
Price 8d.]

page_text: States of America, do hereby declare the nature of this invention, and in what.
manner the same is to be performed, to be particularly described and ascertained
in and by the following statement:-
The object of this invention is to provide a neat form of gearing for cycles and
other machinery, by which increased speed can be obtained without an appreciable
increase of power required.
Our improved gearing, as applied to cycles, is most conveniently combined
with the sprocket-wheel on the crank-shaft, or, in that class of cycle known as
"front drivers," with the hub of the driving wheel; but when used with other
machinery, the sprocket may be re-placed by any other wheel, such as a pulley,
cog-wheel, or vehicle wheel.
Reference being had to the accompanying drawings:-Figure 1 is a front face
view of the mechanism comprised in our invention, the cover of the casing being
partly broken away.
Fig. 2 is a section taken on the line of Fig. 1 looking in the direction of
the arrows; Fig. 3 is a section taken on the line y-y of Fig. 2 looking in the
direction of the arrows; and Fig. 4 is a section through some of the parts of the
mechanism, taken on the line of Fig. 3, looking in the direction of the
arrows, the pinions being shewn in elevation. Fig. 5 is a detail view of some of
the parts;
And Fig. 6 is a section taken on the line ¹¹ of Fig. 5.
The invention comprises the box-like casing A which consists of a disc B having
a central opening A¹ surrounded by an inwardly projecting flange a. The disc B
has an annular flange C formed with a shoulder I to seat the cover E which is
secured thereto by screws F. This casing may be formed by a hollow-faced hub
cycle wheel, gear-wheel, sprocket-wheel, pulley, or similar part of machinery
to be rotated.
of a
The shaft G passes loosely and centrally through the cover E at M. (or a ball
bearing applied thereto) and carries the crank I or other means, such as a wheel,
for applying power to the shaft. A tooth-wheel J is arranged upon the shaft
between the cover E and the boss K on the disc K¹ which is loosely fitted within
the opening A'. In order to render the rotation of the disc B of the casing A
around the disc ' as frictionless as possible, it may be formed with an annular
groove corresponding to a similar groove in the flange a and adapted to retain
a series of balls between the discs K' and B. The tooth-wheel is caused to
rotate with the shaft by means of the feather L. The boss 0, on the inner side of
the wheel J, is reduced in diameter to form an annular seat P for the web Q, having
the central perforation R to permit of its being passed over the reduced portion
of the boss of the wheel J, and provided with armis S, T. A collar U is adjusted
on the reduced portion of the boss 0, and is prevented from turning by means of
screws K (Figs. 2, 5, 6,) having their heads recessed into the outer face of the
disc K and their ends reduced and threaded into apertures Q¹ in bosses 7 on the
web Q. The disk K is held stationary by screws n which unite it with the
stationary bracket N, which, in the case of cycles, would be represented by the bear-
ing casing on the end of the fork of the frame, or the crank-bracket, as the case
may be, or any stationary part of the machine to which the invention is ap-
plicable.
Pinions V mesh with the tooth-wheel J and have bosses which are rotatably
seated in apertures s of the arms S of the web Q, and have larger pinions V1 cast
integral therewith. The pinions V₁ mesh with teeth won the inner periphery
of the ring W.
Pinions X, having bosses, cast integral with pinions X', are rotatably mounted
in apertures at the ends of the arms T of web Q. The pinions X mesh with
teeth won the outer periphery of the ring W and the pinions X mesh with teeth y¹
on the inner periphery of the ring Y secured to the cover E of the casing by
screws e, or to the flanges C of casing A.

page_text: The ring W may be formed with an annular bead W engaging a groove in the
disc B or back of the casing A to keep it in place. The groove may be fitted with
balls if desired in order to render the friction as small as possible.
The pinions V, V and X, X' are retained equi-distant by the arms S, T, and are
kept in place in the said arms by the casing in one direction and the inner face
of the pinions V1 and X¹ resting against the faces of the arms S, T, in the other
direction.
In operation, power applied to the crank I--or like means for applying it--
rotates the tooth-wheel Jin, for instance, the direction indicated by the arrow
head marked thereon. Pinions V, V₁ are rotated in the opposite direction; ring W
in the same direction; pinions X, X', and the ring Y, together with the casing,
in the opposite direction to V, VI and W, but in the same direction as the shaft G.
It will be understood, that inasmuch as the tooth-wheel J is of greater diameter
than the pinion V, and the pinions X smaller than the ring W-the speed of
which is greater than the shaft G-that a greatly increased speed will be imparted
to the ring Y and the casing, hub, or the like.
Having now particularly described and ascertained the nature of our said in-
vention and in what manner the same is to be performed, we declare that what we
claim is;-
(1) The hereindescribed improvements in sprocket-wheels and gearing for
cycles and other machinery, said improvements comprising the casing, hollow-
faced hub, sprocket-wheel gear wheel, or the like fitted with a suitable cover; a
central opening in said casing and an inwardly projecting flange surrounding said
opening, a disc movably fitted in said opening, and adapted to be secured to a
stationary object; a pinion secured to the shaft carrying the crank or other means
for applying power thereto; a web carried by said pinion and radially projecting.
arms on said web; means, such as screws, for connecting said web with the afore-
said disc to hold said web stationary pinions rotatably carried by the shorter of
said arms, and adapted to mesh with the pinion first mentioned larger pinions
formed integral with the last mentioned pinions; a toothed ring having inside
teeth encompassing and meshing with said larger pinions; pinions rotatably
mounted in the longer arms of the web and meshing with teeth on the outer
circumference of the toothed ring aforesaid; larger pinions formed integral with
the last mentioned pinions and meshing with teeth on the inner circumference of a
ring encompassing said larger pinions and secured to the casing or its cover, all
substantially as and for the purposes herein before set forth and illustrated in the
drawings hereunto annexed.
(2) The hereindescribed improvements in sprocket-wheels and gearing for
cycles and other machinery, comprising the parts hereinbefore enumerated, and
arranged substantially as and to operate in the manner hereinbefore set forth and
shewn in the drawings hereunto annexed.
Tate this 19th dov of November 1898
R. RAINSFORD,
Agent for Applicants.