Improvements in or relating to Driving Mechanism for Velocipedes.
Year: 1898

page_text: Date of Application, 27th Aug., 1898
Complete Specification Left, 21st Apr., 1899-Accepted, 26th Aug., 1899
PROVISIONAL SPECIFICATION.
Improvements in or relating to Driving Mechanism for Velocipedes.
We, JOHAN MELCHER CARLSON and EMIL ALBERT OLSON GÖTHE, Mechanicians,
both of 3, Liljansplan, Stockholm, Sweden, do hereby declare the nature of this
invention to be as follows:-
This invention relates to velocipedes and it has for its object to provide an
arrangement whereby the stroke of the pedals or treadles can be varied.
In order that our said invention may be properly understood we have here-
unto appended three explanatory sheets of drawings, whereon,
Fig. 1 is a diagram of a bicycle.
Fig. 2 is an enlarged partly sectioned plan of the gearing.
Fig. 3 is a view showing the position of the plate d when the pivot centre
of the levers n is at its greatest distance from the centre of the gear wheel a.
Fig. 4 is a view showing the position of the plate d when the pivot centre of
the levers n coincides with the centre of the gear wheel a.
Figs. 5 and 6 show positions of the bearing socket h.
The arrangement consists essentially in fitting eccentrically within the gear
wheel a circular disc which is capable of being revolved and which is provided
with a series of holes bored at intervals apart on a circle which cuts through
the centre of the gear wheel. The pivot pin for retaining the disc in position
can be locked into any one of the holes aforesaid. An arrangement is also pro-
vided for withdrawing the pivot pin from the hole in which it is inserted when
desired.
On the drawings a is the gear wheel which drives the pinion a¹. on are the
pedal or treadle levers. 9 is the pivot pin. d is the disc. f are the holes in
the disc.
As will be seen the gear wheel a, which is driven by the pedal or treadle
levers, has a circular opening in it which is eccentric of the gear wheel and
which is provided with a ring in which the disc d is movably secured. In this
disc six or other suitable number of holes are bored and, as shown at Figs. 3
and 4, these holes are arranged on a circle which cuts through the centre of the
gear wheel a. The disc is retained in position by the movable pivot g
which is made to engage with any one of the holes f. When it is desired to
withdraw the pivot g from the hole f in which it is inserted all that is necessary
is to turn the bearing socket h which is arranged outside of the gear wheel and
is in connection with the pivot g. This can be done by means of a string m
wound round the bearing socket h and firmly secured to it. When the bearing
socket is turned the inclined groove works upon the pin p fixed to the
bearing with the result that the socket is moved laterally either in or out. Fig. 5
shows the socket moved outwards so as to withdraw the pin g, indicated in
dotted lines, from the hole f. Fig. 6 shows the socket moved inwards and the
ing locked in the hole f.
The levers n are fastened to the plate d.

page_text: When the pin g is withdrawn from a hole in the plate d the latter can rotate
and the pin g be again secured in any one of the other holes f.
Dated this 27th day of August 1898.
H. D. FITZPATRICK,
100, Wellington Street, Glasgow, Agent.
Improvements in or relating to Driving Mechanism for Velocipedes.
We, JOHAN MELCHER CARLSON and EMIL ALBERT OLSON GÖTHE, Mechanicians,
both of 3, Liljansplan, Stockholm, Sweden, 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 velocipedes and it has for its object to provide an
arrangement whereby the stroke of the pedals or treadles can be varied.
Referring to the drawings filed with our Provisional Specification, whereon,
Fig. 1 is a diagram of a bicycle.
Fig. 2 is an enlarged partly sectioned plan of the gearing.
Fig. 3 is a view showing the position of the plate d when the pivot centre
of the levers n is at its greatest distance from the centre of the gear wheel a.
Fig. 4 is a view showing the position of the plate d when the pivot centre of
the levers n coincides with the centre of the gear wheel a.
Figs. 5 and 6 show positions of the bearing socket h.
The arrangement consists essentially in fitting eccentrically within the gear
wheel a circular disc which is capable of being revolved and which is provided
with a series of holes bored at intervals apart on a circle which cuts through
the centre of the gear wheel. The pivot pin for retaining the disc in position
can be locked into any one of the holes aforesaid. An arrangement is also pro-
vided for withdrawing the pivot pin from the hole in which it is inserted when
desired.
n are the
On the drawings a is the gear wheel which drives the pinion a
pedal or treadle levers. 9 is the pivot pin. d is the disc. f are the holes in
the disc.
As will be seen the gear wheel a, which is driven by the pedal or treadle
levers, has a circular opening in it which is eccentric of the gear wheel and
which is provided with a ring in which the disc d is movably secured. In this
disc six or other suitable number of holes f are bored and, as shown at Figs. 3
and 4, these holes are arranged on a circle which cuts through the centre of the
gear wheel a.
The disc is retained in position by the movable pivot g
which is made to engage with any one of the holes f. When it is desired to
withdraw the pivot g from the hole f in which it is inserted all that is necessary
is to turn the bearing socket h which is arranged outside of the gear wheel and
is in connection with the pivot g. This can be done by means of a string m
wound round the bearing socket h and firmly secured to it. When the bearing
socket is turned the inclined groove works upon the pin ? fixed to the
bearing with the result that the socket is moved laterally either in or out. Fig 5
shows the socket moved outwards so as to withdraw the pin g, indicated in
dotted lines, from the hole f. Fig. 6 shows the socket moved inwards and the
pin locked in the hole f
The levers are movably fastened to the plate d by means of a suitably
screwed pin g and washer q' and to the ends of cranked levers n', n¹ which latter
are movably secured upon the shaft u in such manner that the treadles, at their

page_text: ends, can, by the movement of the feet, be caused to perform a vertical up
and down movement (indicated by the full and dotted lines Fig. 1) which
movement is transmitted by the levers n to the plate d and wheel a with the
result that the latter is caused to revolve.
When the pin g is withdrawn from a hole in the plate d the latter can rotate
and the pin g be again secured in any one of the other holes f.
Having now particularly described and ascertained the nature of our said
invention, and in what manner the same is to be performed, we declare that
what we consider novel and desire to claim is:-
1. A velocipede characterized by a circular disc fitted in a ring in the gear
wheel connected with the levers of the pedals and provided with a series of holes
bored at intervals apart on a circle which cuts through the centre of the gear
wheel, and a pivot or pin which is arranged to engage in the holes of the disc
for the purpose of locking it in the adjusted position, substantially as and for
the purpose set forth.
2. A velocipede characterized by a bearing socket connected with a yielding
pin and placed outside the bearing of the gear-wheel and provided with a groove
in which a pin or peg moves, for the purpose of withdrawing the pin or pivot
from the hole in the circular disc, by turning the bearing socket, substantially
as set forth.
3. The construction of driving mechanism substantially as herein before des-
cribed and shown on the drawings, annexed to our Provisional Specification.
H. D. FITZPATRICK,
100, Wellington Street, Glasgow, Agent.
H. D. FITZPATRICK,
100, Wellington Street, Glasgow, Agent.