Improvements in Velocipedes.
Year: 1894

page_text: Date of Application, 19th May, 1894
Complete Specification Left, 14th Nov., 1894-Accepted, 15th Dec., 1894
PROVISIONAL SPECIFICATION.
Improvements in Velocipedes.
I, THOMAS PATTISON, of 20 Mary Street, Johnstone, Pattern Maker, do
hereby declare the nature of this invention to be as follows:-
My invention relates to velocipedes and especially to velocipedes of the kind
which are driven by a chain such as safety bicycles and similar machines.
The object of my invention is to construct an improved arrangement of gearing
whereby the speed of the machine is increased without increasing the amount of
pedalling.
According to my invention I do not connect the pedal crank axle direct to the
axle of the driving wheel as is commonly the case in chain driven machines but
provide an intermediate shaft or countershaft through which the two axles are
connected.
In order that my invention may be readily understood I will describe one
method of carrying out the same with reference to a safety bicycle by way of
example.
The pedal crank axle rotates in bearings in the ordinary manner and is
provided with a gear wheel of suitable form. I provide also a countershaft which
is furnished with two gear wheels securely connected together; said countershaft
is adapted to rotate in suitable bearings preferably situated on the bottom member
of the frame between the pedal axle and the driving wheel axle. A chain passing
round the pedal gear wheel and one of the wheels on the countershaft, preferably.
the smaller one, drives the countershaft and another chain passing round the
second wheel, which is preferably, the larger of the two wheels, on the counter-
shaft and a suitable gear-wheel on the driving wheel axle drives said driving
wheel. The driving wheel is therefore driven through. the medium of the
countershaft.
By my improved device I am enabled to drive the machine very fast without
increasing the speed of pedalling; the force required is of course considerable
but the extra exertion is more than compensated by the increased speed.
Dated this 19th day of May 1894.
:
HASELTINE, LAKE & Co.,
45, Southampton Buildings, London, W.C., Agents for the Applicant.
COMPLETE SPECIFICATION.
Improvements in Velocipedes.
I, THOMAS PATTISON, of 20 Mary Street, Johnstone, Pattern 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 chain-driven velocipedes.
The object of my invention is to provide gear whereby the speed of such
machines as compared with machines provided with ordinary gear can be increased
without increasing the rate of pedalling.
According to my invention instead of connecting the pedal crank-axle direct

page_text: to the axle of the driving wheel of the machine as is commonly, the case in chain-
driven machines, I provide an intermediate shaft through which the two axles are
connected.
In order that my invention may be readily understood I have shown in the
accompanying drawing which is a side elevation of a bicycle how I carry the same
into practical effect.
A is the driving wheel of the bicycle having an axle A with a gear wheel A³
secured thereto. C is the pedal crank-axle furnished with pedals C1, C¹ and with
a gear wheel C. D is a shaft supported in suitable bearings on the bottom
member of the frame as shewn. The said shaft D has secured thereon two
gear-wheels D', I the smaller one of which D₁ is connected to the pedal
gear-wheel C by the chain E and the larger one of which, D', is connected by a
chain E with the gear wheel A2 on the driving axle. When the pedals C¹, C
are rotated the gear-wheel C drives the shaft D through the medium of the
chain E and gear wheel D', while the gear wheel D' secured to the shaft D drives
the wheel A through the medium of the chain E and gear wheel A³. The
wheel A is therefore driven through the medium of the shaft D and the gear
wheels D', D² which have different diameters and are so arranged relatively to
each other and to the wheels A2 and C' that they operate to increase the speed of
the wheel A: as above set forth.
By my improved device I am enabled to drive the machine very fast without
increasing the speed of pedalling, the extra exertion required being more than
compensated by the increased speed attained."
I do not restrict myself to bicycles of the "diamond frame" type shewn in the
drawings.
Having now particularly described and ascertained the nature of my said
invention and in what manner the same is to be performed, I declare that what
I claim is :-
A velocipede provided with chain driving gear substantially as described with
reference to the accompanying drawings for the purpose specified.
Dated this 13th day of November 1894.
HASELTINE, LAKE & Co.,
45, Southampton Buildings, London, W.C., Agents for the Applicant.