Improvements in Driving Mechanism for Velocipedes.
Year: 1889

page_text: Date of Application, 27th Sept., 1889
Complete Specification Left 27th June. 1890-Accented 23rd Aug.. 1.890
PROVISIONAL SPECIFICATION.
Improvements in Driving Mechanism for Velocipedes..
HENRY ROE,, of, 36 Raglan Street Coventry Machinist, in the County of
Warwickshire, do hereby declare the nature of this invention to be as follows
-
My invention provides one or more adjustable ball eccentrics on the crank shaft, or
cin any other position as a propelling power, to all cycles as shewn at A Fig. 1. On the
outer adjustable rim of which is a lug B to which lug I shall attach a rod or hollow
tube by means of arpin, and nut, or other device, communicating with the pin or
stud on the first geared wheel, by which means I can entirely dispense with the
chain, or by using a short one from the wheel D to the hub wheel E prevent,,all
stretching in the chain. It will be seen how easily it can be geared, up to any
required pitch by simply changing the first wheel D which I shall make movable and
place them in such a position as expediency may require.
Fig. 2 shews-eccentric-in-section.
D
.
1.000
HENRY ROE,
Applicant.
COMPLETE SPECIFICATION.
Improvements in Driving Mechanism for Velocipedes.
I, HENRY ROE, of 36 Raglan Street, Coventry, in the County of Warwick,
Machinist do hereby declare the nature of my said invention and in what manner the
same is to be performed, to be particularly described and ascertained in and by the
following statement :-
On safety bicycles and similarly constructed velocipedes, in which the pedal crank-
shaft does not form part of the driving wheel, but has to be connected to the latter
by means of a separate mechanism, which generally is arranged so as to act as a
multiplying gear, I do not use a chain in combination with two chain wheels, but
substitute a connecting rod or link actuated by means of an eccentric; the multiplying
action is provided by a spur wheel mechanism mounted either between the rod and
the driving wheel or between the eccentric and the pedal shaft. I may employ a pair
of eccentrics and a pair of connecting links. Referring to the drawings accompanying
this specification, in figures 1, 2 and 3 A is the pedal crank shaft. B is a spur wheel
driving the wheel D in the same direction as itself by means of the interposed
wheel C; the eccentric E, by means of the link or rod actuates the stud I. H in
figs. 1 and 3 represents the part of the frame which holds both pedal crank shaft and
main wheel bearings.
On fig. 1. the eccentric E is keyed to the crank shaft; the speed of the driving
wheel may be varied by altering the size of wheel B; the intermediate wheel C is
mounted on a swinging arm G, which accomodates itself to the size of wheel B.
The strap of the eccentric is preferably isolated from the latter by balls, and is
constructed so as to be capable of adjustment.
Fig. 2. shews two eccentrics, E, E keyed to the crank shaft A, with a pair of
rods F, F, to drive the wheel B; the eccentrics are so mounted that their dead points
do not coincide.
In Fig. 3 the driving wheel B is keyed an the crank shaft A and the driven
wheel D carries the eccentric E, which by means of the rod F, terminating at the
stud I on crank K, which is keyed on the spindle of the driving wheel of the
velocipede, actuates this crank K.

page_text: Having now particularly described and ascertained the nature of my said Inven-
tion and in what manner the same is to be performed I declare that what I
claim is :-
1). The combination of an eccentric and connecting rod for the purpose of
transmitting motion from the pedal crank shaft to the driving wheel of a velocipede.
2). The combination of one or more eccentrics with a multiplying mechanism
substantially as described.
3). the combination of an eccentric with a multiplying gear which can be varied
by changing the one wheel B and altering the position of the intermediate wheel C
by means of the radial arm G, or similar device.
4). The combination of two eccentrics in such a position that their dead centres do
not coincide in the manner and for the purpose described.
5). The combination of the eccentric E in Fig. 3 and the rod F for the purpose
of transmitting motion from the multiplying gear to the driving wheel of a velocipede,
substantially as described.
Dated this 26th day of June 1890.
HENRY ROE.