Year: 1895

page_text: Date of Application, 7th Nov., 1895-Accepted, 14th Dec., 1895
Fig. 2 the application of a high gear;
Figs. 3 to 6 show the chain-wheels, and
Figs. 7 to 12 parts of the chain.
The chain-wheels are arranged in such a way that the wheels of different sizes a
and a provided on the pedal crank shaft correspond with those b, b' placed on the
wheel so that by connecting the large wheel of the crank axle a with the small
wheel of the driving wheel a higher gear is obtained than by the connection of
the smaller wheel a¹ of the pedal axle with the larger wheel b₁ of the driving
wheel. The coupling of the wheels is effected by the chain by opening and
closing the same at one point where its construction is especially fitted for this
purpose. Figs. 7 to 12 show this link in various sections and views. The chain
consists of separate plates c and d which cover each other alternately and are
connected with each other by means of pins. In the link serving as the locking
link this pin f is adapted to be easily displaced. As is shown in Fig. 9 the two
inner plates c are connected with each other by means of a sleeve c' in which the
piu flies and at the same time connects the outer plates d with the inner ones by
passing through the outer plates at both sides. Figs. 11 and 12 show the pin fin
front and partial section; it will be seen chiefly in the latter view, that the pin is
bored along its length in which bore a flat spring is put which carries a locking
nose g protruding out of and over the end of the pin and having the tendency to
press outwards. If a pin thus formed is used for connecting the links c and d, the
locking nose g will lie outside the outer plate d as shown in Fig. 10 and will hinder
the falling out of the pin f; for detaching the chain a key 7 shown in Fig. 9 is
used. This key is provided at its end with a conical hole which, when put
over the locking nose g, presses it back and pushes the pin out of the two links o
and d. If the rider wishes to change, for instance, the gearing a, b, to a¹, b', he
removes the pin f by means of the key as above described, passes the chain round
the wheels a and b and closes it at the same spot by re-inserting the pin f.
Fig. 7 shows an instrument intended to hold together the two links c and d in
order to permit of easy insertion of the pin f to close the chain. This instrument
consists of a metal bow i the two arms of which are recessed in the inner side to

page_text: embrace respectively the sleeves c¹ or d'. By means of the spring k the links are
kept in the proper position towards each other, and the pin can be inserted
without any difficulty whereupon the bow i is removed.
"
Having now particularly described and ascertained the nature of this inven-
tion and in what manner the same is to be performed, I declare that what I
claim is :-
The method and means for changing the gear of a chain driven velocipede
wherein the driving chain having a detachable link may be passed round either of
two pairs of wheels a, b or a', b', of different relative sizes, two links c and d of the
chain being connected by means of a removable pin f with a spring locking nose g
adapted to be operated as set forth.
Dated this. 7th day of November 1895.
...
.t
CITE
HERBERT HADDAN & Co.,
18, Buckingham Street, Strand, London, W.C., Agents for the Applicant.