Improved Driving Gear for Cycles.
Year: 1896

page_text: This Print is in accordance with the Original Specification as it stands after
Amendment (under Section 11 of the Patents, &c. Act, 1883) as required by
the decision of the Comptroller General of the 9th day of March 1898.
Date of Application, 11th Nov., 1896
Complete Specification Left, 11th Sept., 1897-Accepted, 6th Nov., 1897
Improved Driving Gear for Cycles.
I, JAMES STALEY, R.P.C. Brailes, in the County of Warwick, Hydraulic and
Sanitary Engineer do hereby declare the nature of this invention to be as follows:-
The improved driving gear for cycles constituting this Invention has for its
object to increase the power of the rider in ascending hills & the like.
This improved gear comprises one large gear wheel on each side of crank axle
meshing their teeth with two smaller gears mounted above, to which is connected
the horizontal shafts by eccentrics to the driving wheel.
Dated this Tenth day of November 1896.
JAMES STALEY,
Brailes, Warwickshire.
I, JAMES STALEY R.P.C., of Brailes, Banbury, in the County of Warwick,
Hydraulic and Sanitary 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 an improved driving gear for cycles which consists
essentially of a train of spur gearing communicating motion from the pedal-crank
axle to an intermediate or secondary axle, and of eccentric gear for communicating
motion from the intermediate or secondary axle to the driving wheel.
In the accompanying drawing which illustrates this invention:-
Figure 1 is a broken view in side elevation, and
Figure 2 is a broken view in plan showing one method of carrying the invention
into practice

page_text: Figure 3 is a diagrammatic view on a smaller scale showing an alternative
constructions.
Throughout the views similar parts are marked with like letters of reference.
Referring to Figures 1 and 2. On the pedal-crank axle A is fixed a spur
wheel B gearing with a spur pinion C fixed on an intermediate or secondary axle D
mounted in a 'suitable bearing a carried by one of the members X of the frame.
In sonie cases the spur gearing may be duplicated one pair of wheels being mounted
on each side of the pedal-crank axle bracket to equalise its strain and wear.
On each end of the intermediate or secondary axle D-exterior to the bearing a
carrying it is mounted an eccentric E, and on the hub or axle F of the driving
wheel are similar eccentrics G. The eccentrics E and G are surrounded by sheaves
or straps E and G respectively, the sheaves of each pair of eccentrics on each side
of the machine being connected by means of suitable rods H. The eccentrics
and their sheaves or straps are preferably provided with ball bearings to reduce
friction, and the rods H may be made adjustable in length if desired to provide
for the adjustment of the gear to the frame of the machine.
It will be understood that the ratio of speed between the pedal-crank axle and
the driving wheel will depend upon the relative sizes of the spur wheels and
pinions.
In the arrangement of the gearing shown by Figures 1 and 2 the motion is
imparted by the thrust of the rods H.
To communicate the motion by the pull of the. rods H the intermediate or
secondary axle D must be driven in the same direction as the pedal-crank axle A.
This may be done by making the spur wheel B on the pedal crank axle A an
internal one as shown by Figure 3.
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. The improved driving gear for cycles, substantially as herein described and
illustrated by the accompanying drawing.
2. A driving gear for cycles consisting essentially of a secondary or intermediate
axle such as D receiving motion from the pedal-crank axle A by means of spur
gearing such as B, C, of eccentrics such as E mounted on the intermediate or
secondary axle D; of eccentrics such as G mounted on the hub F of the driving
wheel; of sheaves or straps such as E' and G' surrounding the eccentrics E and G
respectively, and of rods such as H connecting sheaves or straps E¹ and G
respectively, as herein set forth and illustrated by Figures 1 and 2 of the
accompanying drawing.
3. A driving gear for cycles consisting essentially of a secondary or intermediate
axle such as D receiving motion from the pedal-crank axle A by means of an
internal spur wheel B mounted on the pedal-crank axle and a spur pinion C
E, mounted
mounted on the secondary axle D, of eccentrics such as
on the intermediate or secondary axle D, of eccentrics such as G mounted
on the hub F of the driving wheel, of sheaves or straps such as E¹ and G¹ surround-
ing the eccentrics E and G respectively, and of rods such as H connecting sheaves
or straps E¹ and G¹ respectively, as herein set forth and illustrated by Figure 3 of
the accompanying drawing.
this 11th day of September 1897.
ROBERT E. PHILLIPS, Assoc. M. Inst. C.E., M.I. Mech. E.,
Consulting Engineer and Patent Agent,
70, Chancery Lane, London, W.C., Agent for the Applicant.