Improvements in the Driving Mechanism of Velocipedes and other Machines.
Year: 1891

page_text: Date of Application, 7th Aug., 1891
Complete Specification Left, 10th Sept., 1891-Accepted, 31st Oct., 1891
PROVISIONAL SPECIFICATION.
Improvements in the Driving Mechanism of Velocipedes and other
Machines.
We, WALTER AYLWARD EVANS, Machinist, of 267, Graham Street, THOMAS
COWAN, Merchant, of 323, St. Mary Street, and ALEXANDER WRIGHTSON
LAWE, Gentleman, of Edmonton Street, all in Winnipeg, Manitoba, Dominion of
Canada, do hereby declare the nature of this invention to be as follows :-
Our invention relates to improvements in the driving mechanism of velocipedes
and machines of like character whereby a regular positive and powerful motion
may be imparted from the pedal shaft to the axle of the driving wheels of the
machine with a minimum of friction and a minimum of exertion, the said mechanism
being capable of being applied conveniently to any form of velocipede, bicycle, or
tricycle.
The pedal shaft is provided with a worm which gears with a worm pinion on a
shaft at right angles to the pedal shaft, the worm wheel shaft being turned about
the extent of one tooth for each revolution of the pedal shaft and being geared up,
through a train of spur wheels and pinions on intermediate vertical shafts and:
through a bevel wheel and pinion with a horizontal shaft geared by equal spur,
wheels with the driving wheel axle, the wheels of the several intermediate shafts
being practically equal to one another as likewise their pinions so as to impart the
desired speed of rotation to the driving wheel axle, say about five and one half
revolutions, or practically so, to every revolution of the pedal shaft. The whole;
of this gearing is enclosed within a casing and a machine provided with the driving.
gear above described will be easy to run and a great increase of speed will be
obtained over the old system of driving direct by cogs, as in the improved driving
mechanism described there is no direct resistance upon the pedal shaft, the motive;
power being produced by the sliding motion of the worm and screw, which, worm
only turns one tooth of the worm wheel in every complete revolution and therefore
no direct resistance. is offered to the feet of the rider of the machine.
The driving mechanism may, if desired, be employed in connection with mowers
or binders by placing the worm upon the axle whereby the drive wheels will act
direct upon the worm wheel.
Dated thin 7th day of August 1891
COMPLETE SPECIFICATION.
Improvements in the Driving Mechanism of Velocipedes and other
Machines.
+
We, WALTER Aylward Evans, Machinist, of 267, Graham Street, Tohмas
COWAN, Merchant, of 323, St. Mary Street, and ALEXANDER WRIGHTSON LAWE,
Gentleman, of Edmonton Street, all in Winnipeg, Manitoba, Dominion of Canada,
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 the driving mechanism of velocipedes

page_text: and machines of like character whereby a regular positive and powerful motion may
be imparted from the pedal shaft to the axle of the driving wheels of the machine
with a minimum of friction and a minimum of exertion. A further object of the
invention is to provide a mechanism capable of being applied conveniently to any
form of velocipede bicycle or tricycle and which will be durable and simple in its
construction.
The invention consists in the novel construction and combination of the several
parts as will be hereinafter fully set forth and pointed out in the claims.
Reference is to be had to. the accompanying drawings forming part of this
Specification, in which
Figure 1 is a side elevation of a velocipede having the improvement applied
thereto.
Figure 2 is a plan view of a velocipede, a portion of the body being broken away
to disclose the pedal shaft and its connection with the driving mechanism.
Figure 3 is a vertical section through the casing containing the mechanism
intermediate of the pedal shaft and driving axle; and
Figure 4 is a transverse section, through the casing, taken practically on line 4-4
Figure 3.
Similar figures and letters of reference indicate corresponding parts in all the
views.
A casing A is employed to enclose the driving mechanism, through the rear end
of which casing the driving axle 10 of the machine passes and the pedal shaft 11
is journaled in the forward end of the casing. The pedal shaft 11 has a worm 12
on it, meshing with a worm wheel 13 fast upon a vertical shaft 14, the shaft
being journaled within the casing. At each complete revolution of the pedal
shaft, the worm wheel 13 is turned the distance of one tooth, the said worm wheel
being preferably provided with fifteen teeth and requiring the pedal shaft 11. to
be turned fifteen times to impart one revolution to the worm wheel.
A spur
wheel 15 is fast upon the shaft 14 above the worm wheel and to increase the
speed, the wheel 15 meshes with a pinion 16 fast upon a vertical shaft 17
journaled in the casing which pinion is provided with about ten teeth and upon
the same shaft with the pinion a large spur wheel 18 is secured, which wheel
will make three revolutions to one revolution of the wheel 15. The wheel 15
has preferably about thirty teeth and the wheel 18 is also preferably given the
same number. The wheel 18 meshes with a pinion 19 fast upon a vertical
shaft 20 also journaled in the casing and the pinion 19 is preferably provided
with ten teeth, consequently a spur wheel 21 which is also fixed upon the shaft 2
will turn three times to every one revolution of the wheel 18 or nine times to
every revolution of the spur wheel 15. The wheel 21 is preferably provided
with thirty teeth, and meshes with a pinion 22 fast upon a short shaft 23 which
shaft also carries a bevel gear 24. The shaft 23 is journaled in a bracket 25
located within the casing, as is also a horizontal shaft 26 carrying a bevel
pinion. 27 meshing with the bevel gear 24 and a vertical spur gear 28. The
pinion 22 is preferably made with ten teeth and the bevel gear 24 will make three
revolutions to every one revolution of the spur gear 21 or nine revolutions to
every one of the spur gear 18 or twenty-seven revolutions to every one revolution
of the forward spur gear 15. The bevel gear 24 is preferably provided with
thirty teeth and the bevel pinion 27 has ten teeth and the spur gear 28 makes
three revolutions to every one revolution of the bevel gear or nine revolutions to
every one revolution of the horizontal spur gear 21 or twenty-seven revolutions
to every one revolution of the horizontal spur gear 18 or eighty-one revolutions to
every one revolution of the forward horizontal spur gear 15. The vertical spur
gear 28 meshes with and turns a similar sized spur gear 29 which is fast upon the
driving axle 10 of the implement. As the two vertical spur gears 28 and 29 are
of the same size, a driving wheel 30, four feet high, will turn about 'five and
one-half times, or practically so, to every revolution of the pedal shaft.
A machine provided with the driving gear above described will be easy to run

page_text: and a great increase of speed will be obtained over the old system of driving
direct by cogs, as in the improved driving mechanism described there is no direct
resistance upon the pedal shaft, the motive power being produced by the sliding
motion of the worm and screw which worm only turns one tooth of the worm wheel
in every complete revolution and therefore no direct resistance is offered to the feet
of the rider of the machine.
The driving mechanism may, if desired, be employed in connection with mowers
or binders by placing the worm upon the axle whereby the drive wheels will act
direct upon the worm wheel.
Having now particularly described and ascertained the nature of the said
invention and in what manner the same is to be performed, we declare that
what we claim is :-
1. In a driving mechanism for velocipedes and similar machines, the combination,
with the pedal shaft having a worm thereon and the driving axle provided with
an attached gear wheel, of a shaft at a right angle to the pedal shaft and provided
with a worm wheel meshing with the worm upon said pedal shaft and capable of
being turned about the distance of one tooth at each revolution of the pedal shaft,
a series of shafts intermediate of the worm wheel shaft and the driving axle and
a train of spur gear wheels and pinions carried by said shafts, the spur gears and
pinions of each shaft being practically of the same size and forming a connection
between the worm wheel shaft and the gear wheel of the driving axle, as and for
the purpose set forth.
2. In a driving mechanism for bicycles velocipedes or similar machines, the
combination, with the pedal shaft provided with a worm and the driving axle
provided with an attached spur gear, of a series of vertical shafts one being
provided with a worm wheel engaging with a worm shaft and a spur gear of a
given number of teeth, the next shaft with a pinion meshing with the spur gear and
an attached spur gear of a like number of teeth to the gear of the first shaft a
third shaft provided with a pinion and spur gear having teeth corresponding to
the pinion and gear of the intermediate shaft, a fourth vertical shaft provided
with a pinion and bevel gear the bevel gear and pinion having teeth corresponding
in number to the teeth upon the pinions and gears of either of the intermediate
shafts, a horizontal shaft, a gear carried by said shaft meshing with, and of the
same size as, the gear upon the driving axle and a bevel pinion upon the
horizontal shaft engaging with the bevel gear of the vertical shaft, as and for
the purpose specified.
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