Improved Chain Gear for Cycles.
Year: 1895

page_text: Date of Application, 4th Nov., 1895-Accepted, 7th Dec., 1895
Improved Chain Gear for Cycles.
We, EMIL EHLERT and CLAUDE PORCHERET, both of No. 52 Litenja
Prospekt, St. Petersburg, in the Empire of Russia, Mechanics, do hereby declare
he nature of our said invention and in what manner the same is to be performed,
to be particularly described and ascertained in and by the following statement :-
This invention relates to improvements in chain gears for cycles operated in the
asual manner from the pedal-axle, the arrangement and disposition being such that
a high speed may be attained at the ordinary pedalling. This is effected by'
means of an intermediary multiple gear, which drives the rear or driving wheel
and which may be readily attached to any of the known or usual cycles provided
with chain-gearing.
Referring to the accompanying drawing
:-
Fig. 1 is a side view of a bicycle provided with the improved gear.
Fig. 2 is a side view of the sleeves provided with the bearing for the inter-
mediary gear,
Fig. 3 is a side view of a portion of the cycle frame and showing the manner of
attaching said sleeve ;
Fig. 4 is a back view of part of the cycle-frame and its attachments.
Fig. 5 shows part of the ordinary cycle framework without the intermediary
attachments,
Fig. 6 is a side view of a modified arrangement of the gear,
Fig. 7 is a like view without the wheels and chains,
Fig. 8 is a back view of part of the cycle frame and the intermediary
attachments.
Figs. 9, 10 and 11 show a further modification, the views corresponding to those
in Figs. 6-8.
The framework of the cycle is of the usual construction the pedal axle a
being mounted in the connecting sleeve b, in which the framework b', 62 and 63 is
fixed. The pedals c, care keyed onto the axle a in the ordinary manner, while at
ne end of such axle a is also mounted a large chain wheel d. A sleeve or
bearing is secured to the frame part 2 by means of screws g and, as shown in
Fig. 2, its shape is such that it rests on the sleeve b and at the same time receives
the axle h carrying on the one eud the small chain wheel i and on the other, the
large chain-wheel. An endless chain runs round the latter and over the small
chain wheel m keyed onto the axle 1 of the rear or driving wheel n of the cycle,
while a second endless chain runs round the chain wheel d, i, and a third chain
wheel o referred to hereinafter.
It will therefore be seen that on the pedal-axle being rotated, the chain e
transmits the rotary motion to the small wheel i, whereupon the wheel j mounted
on the same axle as the latter transmits such motions to the rear-wheel n through
the medium of chain and wheel m and thus a high speed is attained at an
ordinary revolution of the pedal-axle.
In the example shown in Fig. 1, the small wheel o mounted on axle o' of sleeve p
adjustable on the frame part f3, is provided for taking up the slack of chain e when
necessary.
pare
In the modification shown in Fig. 6, 7 & 8 the wheel o, axle o' and sleeve
dispensed with, the chain e being passed immediately round the small wheel i on
the axle h

page_text: In the construction illustrated in Fig. 9, 10 and 11 the parts or brackets f4
and f5 supporting the axle h are arranged below the pedal axle a. Both of the
latter modifications are intended for new constructions of cycles, whose connecting
sleeve b connecting the framework of the cycle may be easily formed so as, at the
same time, to receive the pedal axle and the axle of the intermediary multiple gear.
It will be evident that the multiple gear shown in Figs. 1 may be readily attached
to any of the ordinary cycles provided with chain-gear.
Having now particularly described and ascertained the nature of our inven-
tion and in what manner the same is to be performed, we declare that what we
claim is :-
:-
Improved chain gear for cycles characterized by the multiple chain gear (i, j, k)
whose axle (3) is mounted respectively in bearing parts (f',3, f5) of sleeves or
brackets (2, 4) and is driven by a chain (e) running round chain-wheel (d)
keyed onto the pedal axle (a), substantially as described and shown in the
-drawing.
Dated the 4th day of November 1895.
PHILIP M. JUSTICE,
Filing Agent.