Improvements in Driving Gear for Cycles and the like.
Year: 1894

page_text: Date of Application, 23rd June, 1894
Complete Specification Left, 25th Mar., 1695--Accepted, 1st June, 1895
PROVISIONAL SPECIFICATION.
Improvements in Driving Gear for Cycles and the like.
WC, JOHN HENRY BAYNES, of Market Street, Manchester, in the County of
Lancaster, Hat Manufacturer, and James Ogilvie MACK PARKER, of 43 Dorset
Street, Hulme, Manchester aforesaid, Engineer, do hereby declare the nature of
this invention to be as follows:-
Our invention relates to improvements in driving gear for cycles and the like,
and our improvements consist chiefly in a novel combination of chain and gear
driving.
In a cycle in which the crankshaft is not concentric with the axis of the driving
wheel or wheels we drive a chain wheel fast on the hub or axle of said driving
wheel (or wheels) by means of a chain from a chain wheel mounted loosely on the
crankshaft and driven therefrom by means of epicyclic or differential gearing; or
as an alternative the chain wheel may be fast on the crankshaft and rotate with it,
and the other chain wheel may be loose on the hub or axle of the driving wheel
(or wheels) and transmit its motion thereto by means of epicyclic or differential
gearing; or as a further alternative we may combine these two modes and employ
two loose chain wheels communicating motion to the first by epicyclic or differential
gearing from the crankshaft and transmitting the motion conveyed by the chain to
the second chain wheel by epicyclic or differential gearing to the hub or axle of
the driving wheel (or wheels).
Dated this 22nd day of June 1894.
H. B. BARLOW & GILLETT,
Agents for Applicants.
We, JOHN HENRY BAYNES, of Market Street, Manchester, in the County of
Lancaster, Hat Manufacturer, and JAMES OGILVIE MACK PARKER, of 43 Dorset
Street, Hulme, Manchester aforesaid, 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 :-
Our invention relates to improvements in driving gear for cycles and the
like, and our improvements consist chiefly in a novel combination of chain and gear
driving.
In a cycle in which the crank shaft is not concentric with the axis of the driving
wheel or wheels we drive a chain wheel fast on the hub or axle of said driving
wheel (or wheels) by means of a chain from a chain wheel mounted loosely
on the crack shaft and driven therefrom by means of epicyclic or differential
gearing.
And in order that our invention may be fully understood and readily carried into
effect we will describe the accompanying two sheets of drawings reference being
had to the figures and letters marked thereon.

page_text: Figure 1 is a side elevation of a bicycle fitted with our improved driving gear.
Figures 2 and 3 are end and side sectional elevations respectively of the improved
driving gear.
Figure 4 is a dingram illustrating a modification of the gear shown in
Figs. 2 and 3.
Figure 5 is a view of an alternative arrangement of our improved driving
gear.
Figure 6 is a modification of the gear shown in Fig. 5.
C.
In Fig. 1a designates the front wheel, the back wheel, and the crank
shaft on which is mounted our improved driving gear shown in detail in
Figs. 2 and 3.
On the crank axle bracket d is fixed a stationary flanged disc e with internal
teeth e, and on the crank shaft c is fixed a disc which carries on studs, supported
also in a ring, two or more (in the example shown, three) toothed pinions
which gear with the internal teeth e' of the stationary Hanged disc e, and also with
the teeth of a ring which is formed with or fixed to the boss of the chain
wheel which is loose on the crank shaft c. The chain wheel is connected by a
chain to a chain wheel by preference of similar size to the wheel and fixed on
the axle of the back wheel b.
In operation when the crank shafte is rotated by the pedals c' the pinions being
mounted on the dise fixed on the crank shaft r, revolve with it and as the said pinions
are in gear with the teeth on the stationary disc e they are also rotated on their
axes the studs", consequently they drive the toothed ring and chain wheel i
and transmit motion by the chain to the chain wheel and so to the back
wheel b.
In place of single pinions as shown and described we might employ two or more
double pinions as illustrated by the diagram, Fig. 4, in which case the larger
diameter of each pinion would gear into the internal teeth e of the stationary
flauged disce and the smaller diameters would drive the teeth of the ring h, or
vice versa if desired.
In the alternative arrangement illustrated by Fig. 5 the gearing is substantially
the some and operates in the same way but we employ toothed bevel wheels in
place of spur wheels ns in Figs. 2 and 3.
"
The bevel wheel e is stationary being fixed to the bracket d and the bevel
pinions are carried on the radial arms of a boss or spider wheel fixed on the
crank shaft. The outer ends of the arms are supported by a ring and the
bevel pinions gear with and drive the bevel wheel which is formed with or fixed
to the hoss of the chain wheel i loose on the crank shaft c.
In the modification of this arrangement illustrated by Fig. 6 we employ two
double bevel pinions on ench radial arm. The small diameter of each bevel
pinion gears with the stationary bevel wheel e and the larger diameter of each
bevel pinion gears with and drives the bevel wheel ; or if desired we might
arrange for the larger diameters to gear with the bevel wheel e and the smaller to
drive the wheel h.
In each of the arrangements of our improved gear described we prefer to
employ at least two pinions y in order to balance and equalize the strain; but
it is obvious that the gear could be worked with a single pinion although it
would not be so satisfactory or mechanical an arrangement.
We also wish it to be understood that we do not limit ourselves to any special
shape or make of crank axle bracket, chain, chain wheels, or other parts which
in themselves form no part of our invention or to the mode of mounting such
parts as the same may be varied or modified in any convenient manner without
departing from the nature and principle of our invention as herein described and
as pointed out in the claims.
Our improved driving gear may be applied to cycles of all descriptions such as
bicycles, tricycles, tandems and multi-cycles.

page_text: Having now particularly described and ascertained the nature of our said inven-
tion and in what manner the same is to be performed we declare that what we
claim is :-
1. In combination two or more toothed pinions mounted on a disc, spider wheel
or its equivalent fixed on and revolving with the crank shaft, a stationary flanged
internally toothed disc, bevel wheel or its equivalent with which said pinions gear
and by which they are rotated on their axes, and drive a toothed ring, bevel wheel
or its equivalent loose on the crank shaft but formed with or fixed to the chain
wheel which transmits motion by a chain to a chain wheel fixed on the driving
axle of the cycle, all substantially as herein set forth.
2. The several combinations and arrangements of parts constituting our improved
driving gear for cycles substantially as herein described and as illustrated by the
accompanying drawings,
Dated this 22nd day of March 1895.
H. B. BARLOW & GILLETT,
17, St. Ann's Square, Manchester, Agents for Applicants.