Improvements in or connected with Velocipedes.
Year: 1892

page_text: Date of Application, 13th Apr., 1892
Complete Specification Left, 9th Nov., 1892-Accepted, 17th Dec., 1892
PROVISIONAL SPECIFICATION.
Improvements in or connected with Velocipedes.
I, ROBERT WALKER SMITH, of the Butts Coventry, in the County of Warwick,
Machinist, do hereby declare the nature of this invention to be as follows:-
This invention relates to improvements in or connected with velocipedes, but is
applicable more particularly to that class of velocipedes known as front steering
safety bicycles and the invention has for its object to construct in an improved
manner a driving gear therefor.
For this purpose, I form upon one end of the crank axle upon which the hub of
the wheel runs loosely, a screw thread, and I screw thereon until it is just within
the axle bearing of the fork a toothed wheel, and this toothed wheel is locked by the
spool or collar of the bearing which is formed with a screw thread of a reverse pitch
to that of the toothed wheel.
This wheel engages a pinion mounted upon a stud or spindle which is clamped to
one side of the fork and that part of the stud or spindle which passes through. the
fork side is formed or mounted eccentrically in order to provide the necessary
adjustment for regulating the wheels and pinions.
Upon the stud or pinion is loosely mounted a toothed wheel which is locked in
position by means of a nut provided with a reverse thread, and this toothed wheel
drives a pinion mounted loosely upon the crank axle and clutched with the hub.
The hub is formed with a steel tubular core which passes therethrough and runs
upon the crank axle and one end of this steel tube is screwed into a threaded
aperture provided to receive it in the face of the pinion whilst the other end is
threaded and screwed into a corresponding recess formed in the bearing cup of the
hub, and thus the hub and pinion are clamped together.
A cover for the gearing may be provided, which cover is easily removeable for
the purpose of oiling and adjusting the parts, and all the revolving parts are fitted
with suitable ball bearings, the hub can be readily detached from the gear, whilst,
by reason of the peculiar arrangement of the parts, any of them can be easily
detached for the purpose of renoval for repairs or otherwise.
Dated this 13th day of April 1892.
VAUGHAN & SON,
Agents for the Applicant.
COMPLETE SPECIFICATION.
Improvements in or connected with Velocipedes.
I, ROBERT WALKER SMITH, Machinist, formerly of the Butts, Coventry, in
the County of Warwick, but at present residing at Laurel House, Astwood Bark,
near Redditch, in the County of Worcester, 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 :-
My said invention relates to improvements in or connected with velocipedes, but
is applicable more particularly to that class of velocipedes known as front steering
safety bicycles and the invention has for its object to construct, in an improved
manner, a driving gear therefor.
For this purpose, I form upon one end of the crank axle upon which the hub of
the wheel runs loosely, a screw thread, and I screw thereon, until it is just within
the axle bearing of the fork, a toothed wheel, and this toothed wheel is locked by the
.מ

page_text: C
рагоу in section representing so much of the
driving wheel of a bicycle and adjacent parts as will serve to illustrate my
invention.
Figure 2. is a side elevation thereof with some of the parts removed.
Figure 3. is a separate face view of the toothed pinion which is fixed with the
hub of the driving wheel.
Figure 4. is an edge view thereof.
Figure 5. is a plan of the hub of the driving wheel.
Figure 6. is an end view thereof.
Figure 7. is a plan of the tubular core of the hub.
Figure 8. is a similar view of the bearing end of the hub, and,
Figure 9. is a detail view of parts.
In the several figures like parts are indicated by similar letters of reference.
a. represents the lower part of the fork which carries adjustable ball bearings a¹
in the ordinary manner, and b. represents the crank axle which is mounted in the
bearings a¹ and upon the ends of which are keyed the usual cranks whilst the
hub c. of the driving wheel runs loosely around the crank axle b. as hereinafter
more fully described.
The crank axle b. is provided at one end thereof with a screw thread b³ upon
which is screwed a toothed wheel until it abuts against a shoulder 6* of the
axle b. and occupies a position upon the inside of the axle bearing a¹ of the fork a.
.whilst in order to fix the toothed wheel, upon the axle b., a screw thread 6* of
: reverse pitch to that of the thread *, is formed upon a reduced diameter of the
axle 1. and upon this is screwed the spool or collar a₁* of the bearing a.
The toothed wheel 63 engages a pinion d. which is formed with a long hollow
boss and this pinion d. is mounted with capability of revolution upon a stud or
spindle e. which is reduced at e¹ to pass through a corresponding hole formed in
the bearing bracket a* removeably fixed to the fork a. and is threaded to receive a
nute by means of which it is securely clamped in position.
The interior of the boss d¹ of the wheel d. is shaped at d¹ to form grooves or
races for a number of balls d* whilst the stud or spindle e. and the removeable
part thereof are correspondingly shaped the whole constituting an efficient ball
bearing from which the wheel d. may be readily dismounted by unscrewing the
T#
nut e*1.

page_text: The boss d' of the stud pinion d. is provided with a male screw thread d' upon
which is screwed a toothed wheel whilst upon a smaller diameter of the boss d¹
is provided a reverse screw thread dupon which is screwed a nut d' which is
received into a recess provided for that purpose in the face of the toothed wheel d*
and the toothed wheel d' is thus securely fixed with the pinion d. but with capa-
bility of easy disconnection.
The toothed wheel d' gears with the pinion c¹ mounted loosely upon the axle b.
and recessed to receive a number of balls * running in a corresponding race
formed in the axle b. which parts together constitute a ball bearing whilst in order
to clutch the pinion c¹ with the hub c. a stud or projection is formed or fixed
upon the former and a corresponding recess is provided in the latter, as shown
more particularly at Figures 3. to 6.
That part of the stud or spindle e. upon the inside of the. fork a. is formed
slightly eccentric to the other part thereof in order to provide the necessary adjust-
ment for wear and for regulating the pitch of the wheels.
The hub c. is formed with a steel tubular core e which passes therethrough and
runs around the crank axle b. and one end of the tubular core c is threaded and
screwed into a threaded aperture formed to receive it in the face of the pinion c¹
whilst the other end is threaded and screwed into a correspondingly threaded
recess c formed in the bearing cup c of the hub c. and thus the hub c. and pinion c¹
are securely clamped together.
The bearing cup c is recessed to form a race for a number of balls c* and the
corresponding bearing is adjustably mounted upon the axle b. by means of a
female thread in the former and a male thread upon the latter, the spool or
collar a of the first axle bearing, which is screwed upon the axle b, in a manner
similar to that herein before described with respect to the opposite end of the axle,
locks the bearing in position as shown more particularly at Figure 9. a washer 67
interposed between those parts preventing any movement being communicated
from one to the other.
This axle bearing a¹ is fixed to the fork a. by means of a bolt a² in order to
render it easily attachable thereto or detachable therefrom whilst a similar arrange-
ment of screw bolts a' is employed to attach the bearing bracket a* to the fork a.
thus enabling the fork to be removed without disturbing the gear.
A cover f. is provided for the gearing and is formed with laterally projecting
lugs through which are passed screw bolts f which screw into tapped holes
formed in the axle bearing bracket a* and in order to give ready access to the
gearing the cover f. is formed in two parts hinged together at so that either part
may, by removing its screw bolt f, be turned down to expose the gearing as
represented at Figure 2. for the purpose of oiling or adjusting the parts.
By the peculiar arrangement and construction of parts herein before described
the hub of the driving wheel can be readily detached from the gear whilst any of
the parts can be easily separated and dismounted for the purpose of repairs or
otherwise.
Having now particularly described and ascertained the nature of my said.
invention and in what manner the same is to be performed, I declare that what I
claim is
1. In a velocipede fitted with the arrangement of gearing herein illustrated, the
combination with the hub of a tubular steel core at its ends solidly but removeably
connected with the hub bearing surfaces one of such bearing surfaces being toothed
to form a pinion, substantially as herein shown and described.
2. In a velocipede fitted with the arrangement of gearing herein illustrated,
forming upon one end of the crank axle two sets of reverse threads, and corre
spondingly threading the toothed wheel and the spool or collar of the axle bearing
to be fixed thereto, substantially as herein shown and described.
3. In a velocipede fitted with the arrangement of gearing herein illustrated,
forming the stud or axle upon which are mounted the wheel and pinion for trans-

page_text: mitting motion to the hub with a slight eccentricity substantially as herein shown
and described and for the purpose stated.
4. In combination with the arrangement of gearing herein illustrated, a remove-
able cover, substantially as herein shown and described.
Dated this 9th day of November 1892.
VAUGHAN & SON,
Agents for the Applicant.