Improvements in Gearing for Driving Velocipedes.
Year: 1894

page_text: Date of Application, 12th Dec., 1894
Complete Specification Left. 4th Sept., 1895-Accepted. 5th Oct.. 1895
PROVISIONAL SPECIFICATION,
Improvements in Gearing for Driving Velocipedes.
I ALFRED VAN NOORDEN of 184 Ladbroke Grove Notting Hill in the County
of Middlesex Merchant do hereby declare the nature of this invention to be as
follows: :-
The object of my invention is to provide a simple but efficient gearing for
driving velocipedes of all descriptions and more especially dwarf or safety bicycles
in and by the use of which any desired speed can very easily be attained.
To carry out this object according to one and the most simple style of arrange-
meut the rear chain wheel is mounted loosely on the driving wheel axle and on the
inner side of such chain wheel is a toothed-wheel of the desired diameter and
number of teeth. On the lower member of the frame the desired distance in front
of the chain wheel is fitted a stud or is mounted an axle the other end whereof
may be supported by an arm from this member and on this stud or axle is mounted
or fitted a double toothed-wheel or two toothed-wheels secured together of differing
diameters and numbers of teeth the smaller of which wheels gears with the wheel
on the side of the chain wheel while the larger of these wheels gears with a
toothed-wheel on the side of the hub of the driving wheel. Suitable ball bearings
can be provided as is customary or otherwise to and for this apparatus.
Therefore by arranging the relative and absolute diameters of these toothed-
wheels and the relative and absolute numbers of the teeth thereof as may be
necessary the desired difference in the speeds of the revolution of the chain wheel
and of the driving wheel is produced.
The stud or axle whereon is the double toothed-wheel instead of or in supplement
of its aforesaid position on the lower member of the frame in front of the chain
wheel may be on a rearward prolongation of this lower member behind the chain
wheel or may be on the upper rear member of the frame above the chain wheel or
may be on au arm secured to either of these members in a proper position.
When it may be desired that this gearing shall be capable of being withdrawn
from action I may so fit and arrange the stud or axle whereon is the double
toothed-wheel or the arm that carries the same in any convenient and ordinary
manner so that this double toothed-wheel can be disengaged from the toothed-
wheels on the side of the chain wheel and on the side of the hub of the driving
wheel and I provide any suitable and usual clutch or other suchlike appliance
which can connect the chain wheel with the hub of the driving wheel but perhaps
preferably I proceed in the following manner.
The chain wheel with its toothed-wheel is fixed on a sleeve which loosely
surrounds the axle of the driving wheel the hub of which wheel loosely surrounds
this sleeve and any suitable ball bearings can be interposed between the axle and
the sleeve and the sleeve and the hub as is customary or otherwise.
While this
gearing is in action it operates as aforesaid but when it is desired to withdraw it
from action the sleeve is caused by any convenient and usual means to slide on the
axle so far as to disengage the toothed-wheel on the chain wheel from the smaller
of the double toothed-wheel and by any convenient and usual means any suitable
and usual clutch or suchlike appliance is caused by any appropriate and ordinary
devices to connect the sleeve of the chain wheel with the hub of the driving wheel
so that they will revolve together while the double toothed-wieel runs loose
although it still gears with the toothed-wheel on the side of the hub.

page_text: I have thus described my invention as applied to a rear-driving dwarf-or safety
bicycle but it can also be applied in a similar manner to other velocipedes.
Dated this 12th day of December 1894.
HART & Co.,
186, Fleet Street, London, E.C., Agents.
Improvements in Gearing for Driving velocipedes..
I ALFRED VAN NOORDEN of 184 Ladbroke Grove Notting Hill in the County
of Middlesex Merchant 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:-
The object of this my invention is to provide very simple but extremely efficient
gearing for driving velocipedes of all descriptions and perhaps more especially
dwarf or safety bicycles in and by the use of which any desired speed can very
easily be attained.
To carry out this object the rear chain wheel is not as is customary rigidly
secured on or to the hub of the driving wheel of the velocipede but is detached
therefrom and is rigidly connected with a toothed-wheel in such wise that these
two wheels revolve together. On a stud fitted on the frame of the velocipede in
the proper corresponding position are loosely mounted two toothed-wheels of
differing diameters rigidly secured together and the toothed-wheel connected with
the chain wheel gears with the smaller of these two toothed-wheels while the larger
of these two toothed-wheels gears with a small toothed-wheel rigidly secured on or
connected with the hub of the driving wheel of the velocipede. This driving
wheel therefore is revolved by and from the chain wheel through this train of
gearing.
This apparatus may be arranged on the one side only of the driving wheel of the
velocipede or on both sides thereof as may be expedient or desirable in each
particular case the first arrangement being perhaps the most simple and the
cheapest while the second arrangement is perhaps the most efficient and the safest.
In the accompanying drawing I have shewn this my invention as fitted to a
dwarf or safety bicycle in and according to the second beforementioned arrange-
ment and Figure 1 is an elevation of the gearing Figure 2 is an horizontal section
of the same and of the hub of the driving wheel and Figure 3 is a side elevation
of the hinder part of the bicycle with this gearing in position.
In this case the axle A passes loosely through the hub B of the driving wheel
and the chain wheel C is rigidly secured on one end of the axle A to cause such
axle A to rotate therewith. On the other end of the axle A the other side of
the driving wheel is rigidly secured a toothed-wheel D which therefore revolves
with the chain wheel C and the lower rear member E of the frame of the
bicycle is so elbowed and formed if necessary and it may perhaps preferably
be such a bracket F is attached thereto as will enable it to support in the proper
_ manner_this_end of the axle A outside_the_gearing while the other end of the
axle A can be supported in the proper manner outside the chain wheel C. On this
bracket F if so formed or on the lower rear member E the desired distance in front
of the axle A is fitted an horizontal transverse stud G or a short axle whereon
are loosely mounted two toothed-wheels H and K of differing diameters rigidly
secured together or it may be created and formed together and the toothed-
wheel D gears with the outer and smaller toothed-wheel K while the inner and
larger toothed-wheel H gears with a small toothed-wheel M rigidly secured on
the side of the hub B of the driving wheel. Suitable ball bearings can if desired
be provided for and fitted to all necessary parts of this apparatus in the customary

page_text: or other manner and the gearing can very conveniently be enclosed in and covered
by a suitable casing N.
Therefore by arranging the relative and absolute diameters of the toothed-wheels
of this train of gearing and the relative and absolute numbers of the teeth thereof
as may in each particular case be necessary the desired difference in the speeds
of the revolutions of the chain wheel and of the driving wheel of the bicycle is
produced.
According to the first beforementioned arrangement all the apparatus is on the
one side ouly of the driving wheel of the velocipede. In this case the gearing is
fitted and arranged as is herein before described except that the toothed-wheel D is
loosely mounted on the axle A instead of being rigidly secured thereon and this
axle A may as is customary be irrevolubly fixed and secured in the frame of the
bicycle. The chain wheel C also is loosely mounted on the axle A by the side
preferably perhaps the outer side of the toothed-wheel D which two wheels C
and D are rigidly secured together and thus as is indeed evident the same action
and effect as are hereinbefore described are produced in and by this arrangement
also.
When desired also the stud G may similarly be fitted on a rearward prolongation
of the lower rear member of the frame of the bicycle behind the driving wheel
axle or on the upper rear member of this frame above such axle or on a downward
prolongation of this upper rear member below such axle or on an arm attached to
one or both of these rear members or of the prolongations thereof as may in each
particular case be convenient or desirable and when expedient or necessary the free
end of this stud G may be supported by a stay or suchlike appliance.
It is also sufficiently obvious that this gearing could be applied in a similar
manner to other velocipedes and no further description is or can be needed.
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. In a gearing for driving velocipedes the combination with a chain wheel C
and a toothed-wheel D rigidly connected thereto and revolving therewith of two
toothed-wheels H and K of differing diameters rigidly secured together and
mounted on a stud G on the frame of the velocipede and a small toothed-wheel M
rigidly connected to and revolving with the hub B of the driving wheel of the
velocipede of which toothed-wheels the wheel D gears with the smaller wheel K
and the larger wheel H gears with the wheel M substantially as and for the
purpose herein before described and declared.
2. The gearing for driving velocipedes substantially as hereinbefore described
and shewn in the accompanying drawing.
Dated this 4th day of September 1895.
HART & Co.,
168, late 186, Fleet Street, London, E.C., Agents.