Improvements in Velocipedes.
Year: 1890

page_text: Date of Application, 20th Feb., 1890
Complete Specification Left, 20th Dec., 1890-Accepted, 14th Feb., 1891
PROVISIONAL SPECIFICATION.
Improvements in Velocipedes.
I, CHARLES LOCK, of 5, Peckham Terrace, Prestbury Road, Upton Park, in
the County of Essex, Pianoforte Maker, do hereby declare the nature of this
invention to be as follows:-
My invention relates to velocipedes and comprises improved means for transmitting
the motion of the cranks to the driving axle.
According to my invention I provide two gear wheels arranged concentrically
and having between them a third or intermediate gear wheel which is in engagement
with the inner side of the outer or larger wheel and the outer side of the inner or
smaller wheel.
The larger gear wheel is fixed to the frame of the machine and the smaller wheel
is secured to the driving axle so as to rotate therewith. The intermediate wheel is
carried upon the pin of the crank and adapted to rotate thereon.
As the crank rotates it is obvious that the intermediate wheel will rotate upon
its axis owing to its engagement with the larger gear wheel, and that this rotary
motion will be imparted to the small gear wheel upon the driving axle, which will
thus be revolved. It is also obvious that the relative proportions of the diameters
of the wheels can be varied according to the speed required.
The gearing hereinbefore described is preferably constructed as described in the
Specification of Letters Patent granted to me dated 18th March 1889 No. 4708.
I also advantageously arrange in conjunction with the cranks the spring
mechanism described in the Specification of Letters Patent dated 25th September
1888 No. 13847 granted to me.
Date L 501 1
CTA 1
1000
G. F. REDFERN & Co.,
4, South Street, Finsbury, London, Agents for the Applicant.
COMPLETE SPECIFICATION.
Improvements in Velocipedes.
I, CHARLES LOCK, of 5, Peckham Terrace, Prestbury Road, Upton Park, in
the County of Essex, Pianoforte Maker, 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 :-
My invention relates to velocipedes and comprises improved means for transmitting
the motion of the cranks to the driving-axle.
According to my invention I provide in connection with each crank a set of
gearing comprising two gear-wheels arranged concentrically, and having between
them a third or intermediate gear-wheel which is in engagement with the inner
side of the outer or larger wheel and the outer side of the inner or smaller wheel.
The largest gear-wheel of each set of gearing is fixed to the frame of the machine
and the smaller wheel is secured to the driving-axle so as to rotate therewith. The
intermediate wheel is carried upon the pin of the crank and adapted to rotate
thereon.
To enable my invention to be fully understood I will describe the same with
reference to the accompanying drawing, in which :-
Figure 1 is a side elevation of a tricycle provided with my improved mechanism;
and,
Figure 2 a vertical section on the line xx, Figure 1, looking in the direction of
the arrow.

page_text: a indicates the frame of the machine, the main or driving-axle, and c, c the
driving-wheels. dd, ee are two pairs of concentric gear-wheels, the wheels d, d,
which are provided with internal gear-teeth, being fixed in the frame a, whilst the
wheels e, e, which are provided with external gear-teeth, are secured upon the pedal
or crank-axle so as to rotate therewith, are the intermediate gear-wheels,
each of which engages with the teeth on the inner surface of one of the wheels d
and the teeth on the outer surface of one of the wheels e, the said intermediate
wheels g, being carried upon pins h, h forming continuations of the crank-pins h¹, h²,
the cranks carrying which are mounted upon the crank-axle f so as to rotate
thereon independently of the said axle.
:―
is a chain or sprocket wheel secured to the axle between the two sets of
gearing and serving through the medium of a band or chain; to transmit the motion
of the crank-shaft to a corresponding sprocket-wheel on the driving shaft b.
The operation of the apparatus hereinbefore described is as follows:-
Assume the cranks to be driven by the rider of the machine in the direction
ndicated by the arrow 1, the result of this will be that the wheels g, g, owing to
their engagement with the wheels d, d, will rotate in the direction indicated by the
arrows 2, so as to impart movement to the wheels e, e and thus to the crank-axle f
in the direction of the arrow 3, the motion of the said crank-axle f being thence
communicated to the driving-axle through the medium of the band j to propel the
machine forward.
Assuming the wheels d, d to be five times the diameter of the wheels e, e, the
latter, during a complete revolution of the cranks, will be caused to make six
rotations, viz., five rotations due to the relative diameters of the wheels d, e, and
one rotation owing to the fact that the wheels g, y have revolved around the
wheels e, e.
It is to be understood that the number of rotations produced by each revolution
may be varied by varying the relative diameters of the said wheels.
The gearing which I have shewn in the drawing is of the kind described in the
Specification of former Letters Patent granted to me dated March 18 A.D. 1889
No. 4708, but it is to be understood that any other suitable form of gearing may be
employed.
have also shewn in conjunction with the cranks the spring-mechanism described
in the Specification of Letters Patent granted to me September 25 A.D. 1888
No. 13847, but it is to be understood that this spring-mechanism may be dispensed
with.
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 :-
The combination with a tricycle or other velocipede of gearing arranged
substantially in the manner herein before described.
.
בד
1900