Improvements in Driving Mechanism for Cycles and the like.
Year: 1899

page_text: Date of Application, 10th Jan,, 1899-Accepted, 8th July, 1899
COMPLETE SPECIFICATION.
Improvements in Driving Mechanism for Cycles and the like.
I, WILLIAM JOHN STOREY, of No. 82, College Street, Balmain, near Sydney, in
the Colony of New South Wales, Engineer, 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:-
This invention relates to certain improvements in driving mechanism for cycles
and the like by means of which what is known as a "high gear" may be applied
to cycles specially bicycles in a simple manner without excessive alteration of the
mechanism or the frame.
In a driving mechanism constructed according to this invention the driving
spindle or shaft has one or two or more off-sete carrying loose mitre or bevelled
toothed wheels gearing in a stationary mitre or bevelled toothed wheel and
in another mitre or bevelled toothed wheel on the driving sprocket or
toothed wheel or pulley. The driving spindle is carried at either end by
ball bearings which are formed in or on cheeks or side pieces which sidewardly
enclose the mitre or bevelled wheels beforementioned. The stationary mitre or
bevelled toothed wheel is screwed to the inside of one of the said cheeks, and the
mitre or bevelled toothed wheel attached to the driving sprocket or wheel or pulley
is carried upon ball bearings on a thimble or sleeve extending inwardly from the
other cheek. The loose mitre or bevelled toothed wheels run also on ball bearings
these being on the ends of the off-sets of the driving spindle. The frame of a
bicycle carrying the above described driving gear has its lower front stay, its
diagonal or seat-post and its lower back fork teriminating in the said checks before
anentioned.
But in order that this invention may be clearly understood reference will now
be made to the drawings herewith in which Figure 1 is an elevation showing these
improvements in driving mechanism for cycles and the like applied to a safety
bicycle. Figure 2 is a side elevation on an enlarged scale of these improvements
and Figure 3 is a sectional plan on the line a a Figure 2.
The lower front stay a the seat post or diagonal 6 and the lower back fork o are
bolted or braised or otherwise fixed to T-pieces a¹ 6 and e' respectively to
which T-pieces the side cheeks Care bolted or braised or otherwise fastened as
shown. Instead of braising or fixing the lower back forks to the T-piece ("
they might be extended right up to the bearing on the outside of the cheeks and
be bolted rivetted or braised thereto. Through these cheek pieces C passes the
crank or pedal spindle A having ball bearings A' adjusting cones A and jamb
nuts A3 at either end and also having pedal-cranks A as well understood. This
spindle A has as shown in the drawings two off-sets B at the outer end of which
are mitre or bevelled toothed wheels B' on ball bearings 13² having adjusting
cones B³ and caps Bs. From end to end of these off-sets B is an oil keep Be
access to which is obtained by unscrewing nut B at either end and the outlet
to the bearings from which is passages or ways marked B. Gearing with mitre
or bevelled wheels I is stationary mitre or bevelled wheel I) surrounding the
shaft A and screwed tightly to cheek C by means of screws D¹ as shown. Ռո

page_text: sleeve or thimble Ca extending from the other cheek C is mitre or bevelled toothed
wheel E having ball bearings E¹ with adjusting cone E. This wheel E is
affixed say by screws 1) to the driving sprocket F from which an ordinary gear
chain carries the motion to the sprocket pinion of the rear driving wheel of the
bicycle.
It will be seen that in use the pedals being propelled by the feet of the rider
that the spindle A together with off-sets B are evolved whereupon the mitre
or bevelled toothed wheels B will revolve edgewise circularly and will thereby be
revolved circumferentially because they gear with the stationary mitre or bevelled
toothed wheel D. The circumferential revolution of the wheels B will revolve
the wheel E and the sprocket I attached thereto. The edgewise revolution of the
off-sets B around the axis of the shaft A and the circumferential revolution of the
wheels B cause the wheel E and the sprocket F to be revolved at an increased
speed in proportion to the varying diameters of the wheels E and I) and of the
wheels B (when they are all mitre wheels at just double the speed of the shaft A).
Many advantages arise from this improved driving geur among others that where
a "high gear" is not required a smaller driving sprocket may be used to attain
the ordinary speed and thus enable the cycle to be propelled with greater ease
and that where "high gear" or increased speed is desired that the leverage of the
cranks is not diminished.
23
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:-
First In driving gears for cycles and the like the combination with the actua-
ting or driving spindle of two or more radial off-sets thereon carrying loose bevelled
toothed wheels gearing with a stationary bevelled toothed wheel and with a like
bevelled tooth wheel upon or fixed to the driving sprocket pulley or wheel sub-
stantially as herein described and explained.
Second-In driving gears for cycles and the like the combination with the
actuating or driving spindle having radial off-sets carrying bevelled toothed wheels.
of side cheeks having bearings for said driving spindle a stationary bevelled
toothed wheel attached to one of said cheeks and a sprocket or pulley affixed to
a hevelled toothed wheel and running upon bearings on a sleeve or thimble on the
other of said cheeks substantially as heroin described and explained.
Third-In driving gears for cycles and the like the combination with the driving
spindle and the set of bevelled toothed wheels and the sprocket of cheeks (side-
wardly enclosing said bevelled toothed wheels) forming the junction of the main
parts of the cycle frame substantially as herein described and explained.
Fourth In driving gears for cycles and the like the combination with the
revolving and stationary wheels and spindles of side cheeks and T-pieces on the
ends of the cycle frame parts substantially as herein described and explained.
Fifth--A icycle having driving gear and frame constructed of the combina-
tions of mechanical parts in the manner and for the purposes substantially as
herein described and explained and as illustrated in the drawings.
Dated this Third day of December One thousand eight hundred and ninety.
eight.
WILLIAM JOHN STOREY.
Haseltine, Lake & Co.,
45, Southampton Buildings, London, W.C.,
Agents for the Applicant.