Improvements in Driving Gears for Bicycles and Tricycles.
Year: 1896

page_text: PROVISIONAL SPECIFICATION.
Improvements in Driving Gears for Bicycles and Tricycles.
We, GEORGE GARNER, of 11, Borron Street, Portwood, Mule-overlooker, and
JOHN GARNER, of 56, Turncroft Lane, Spinner, both of Stockport, in the County of
Chester, do hereby declare the nature of this invention to be as follows:-
The object of this invention is to provide bicycles and tricycles with means for
altering the speed at will which require less exertion of power in pedalling and cause
the machine to run much steadier than hitherto has been the case.
To this end our invention consists in imparting rotary motion from the pedal shaft
indirectly to the driving wheel or wheels of the machine, in lieu of directly, by
interposing an intermediate driver and carrier wheel combined mounted in a bracket
clipped or otherwise secured to the boss of the pedal shaft. The said intermediate
driver and carrier wheel may be either cast or otherwise secured together or upon a
common shaft rotating in the said bracket and are rendered adjustable therein to keep
the chains at the proper tension.
Motion is imparted from the ordinary driver by means of an intermediate chain to
the said carrier wheel and from the said intermediate driver by means of another
chain to the chain wheel on the driving wheel or wheels of the machine. When it is
desired to increase the speed of the said driving wheel or wheels the said carrier wheel
is chosen less in diameter than that of the intermediate driver in connection therewith
and vice versa.
F. BOSSHARDT & Co.,
Agents to Applicants.
COMPLETE SPECIFICATION.
Improvements in Driving Gears for Bicycles and Tricycles.
We, GEORGE GARNER, of 11, Borron Street, Portwood, Mule-overlooker, and
JOHN GARNER, of 56, Turncroft Lane, Spinner, both of Stockport, in the County of
Chester, 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 driving gears for bicycles and tricycles,
the object being to provide means whereby the speed of the driving wheel or wheels
can be altered at will with less exertion of power in pedalling and the machine will
run much steadier than hitherto has been the case.
And in order that our invention may be more fully understood we have caused to
be appended hereunto one sheet of drawings, showing our improvements as applied to
a bicycle, marked with letters of reference indicating like parts in the various figures,
Fig. 1 being a side view and Fig. 2 a plan of one form of our improved driving

page_text: gear, Figs. 3 and 4 are a side view and a plan respectively of another form, and
Fig. 5 a side view of a modification thereof.
In carrying out our invention and referring to the figures generally our improvements
consist in imparting rotary motion from the pedal shaft a, indirectly to the driving
wheel or wheels b of the machine, in lieu of directly as heretofore, by interposing an
intermediate driver and carrier wheel d combined on a single shaft or stud f,
mounted in a bracket e clipped or otherwise suitably secured or formed on the boss a
of the pedal shaft a.
According to one form of our invention, Figs. 1 & 2, the said intermediate driver
and carrier wheel c, d, may be either cast or secured together and adapted to rotate
upon one end of the shaft or stud f, the other end of which is square and received by
a slot formed in the bracket e wherein it is rendered adjustable in block fashion
by means of a screw e mounted in the said bracket and set against the square of the
said shaft or stud whereby the shaft or stud f carrying the wheels c, d, can be set
nearer to or further away from the pedal axle a and the chain & thus kept at its proper
tension. The chain i is kept at its proper tension by adjusting the hind wheel 6 in the
usual way.
Motion is imparted from the ordinary driver g by means of an intermediate chain h
to the carrier wheel d and from the intermediate driver c, by means of another chain i
to the chain wheel k on the driving wheel or wheels b of the machine. When it is
desired to increase the speed of the driving wheel or wheels 6, the carrier wheel dis
chosen less in diameter than that of the intermediate driver c in connection therewith
and vice versa.
According to another form of our invention, see Figs. 3 & 4, in lieu of employing
both chains & i on one side of the machine, we secure the carrier wheel d upon
one end and the intermediate driver c upon the other end of the shaft or stud f
mounted in the bracket e. In this case the outer end of the bracket e in which the
shaft or stud revolves is carried by an arm formed on the inner end of the said
bracket whereon it is rendered longitudinally adjustable by means of the set screw el
to enable keeping the chain h at its proper tension.
In Figs. 1 & 2 the bracket e is shown fixed horizontally but it will be understood
that the same may be fixed or formed otherwise on the said boss, for instance vertically
as shown in Fig. 5, without departing from the nature of our said invention.
The intermediate gear described adds but little weight to the machine, is thoroughly
reliable as the chains will not run off the wheels and the frame is not liable to become
strained as is the case in other intermediate cycle gears.
Having now particularly described and ascertained the nature of our said inven-
tion, and in what manner the same is to be performed, we declare that what we
claim, is-
In, bicycles and tricycles, the combination of an intermediate chain gear c, d, with
the pedal shaft and wheel g, which gear is carried by a bracket clipped or otherwise
secured or formed on the boss a¹ of the pedal shaft a, the wheel g transmitting motion
to the carrier wheel d and intermediate driver c and the latter to the chain wheel k on
the driving wheel or wheels of the machine by means of chains.h & i respectively,
all substantially as and for the purpose set forth."
Dated this 15th dow of Fahnuo 1907
F. BOSSHARDT & Co.,
4, Corporation Street, Manchester, Agents to Applicants: