Improvements in Chain Adjusting Devices for Cycles.
Year: 1898

page_text: Date of Application, 17th May, 1898-Accepted, 30th July, 1898
COMPLETE SPECIFICATION.
Improvements in Chain Adjusting Devices for Cycles.
We, FRANCIS WILLIAM ROBERT SCOTT, of 393, Oldham Road, Newton Heath,
Manchester, and SAMUEL PENNINGTON, of 35, Marsden Street, Newton Heath,
Manchester, Gentlemen, 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 chain adjusting devices for cycles,
the object being to provide a simple and efficient locking device for securing
the axle of the rear or driving wheel in such a manner as to render it impossible
for the latter to slip after the chain has been set at the required tension, and to
replace existing devices of this kind which frequently get out of order and do not
efficiently fulfil the objects in view.
In order that our invention may be fully understood, we will now proceed to
describe same with reference to the accompanying drawings in which Fig. 1 is an
elevation of our improved device. Fig. 2 a plan of same, Fig. 3 a back view, and
Fig. 4 an end view of same.
Fig. 5 shows a front and back elevation of the washer used in connection with
our device.
Fig. 6 is a detail view showing the application of this invention to the back
forks of a velocipede, one half only being shown.
Fig. 7 shows a slightly modified form of this invention.
Our improved device comprises a light frame a furnished with serrations or
teeth bupon its front surface, one end of said frame being bent at right angles
as shown at c, while it is furnished at the back with a projecting block taking
between the arms f of the forks, the device being shown in position (Fig. 6).
We further provide a. washer g (Fig. 5) furnished with teeth or serrations b¹
upon its under surface and with a guiding block designed to slide between
the arms a a¹ of the frame a.
In order to secure the axle m of the rear wheel hub p, it is passed through the
central hole or perforation 9 of the washer g the teeth b¹ of which take into the
corresponding teeth b of the frame, which is arranged against the side of the rear
fork with the block d taking between the arms of the said fork, so that upon
tightening the nut n the parts are firmly secured together thereby rendering it
impossible for the axle m to be drawn forward by the action of the chain or from
any other cause until the nut n has been sufficiently loosened to allow of the
teeth b and b¹ of the rack a and washer g respectively being disengaged.
In order to adjust the chain, the nuts n upon each side of the rear wheel axle m
are loosened until the teeth bb' are clear when the said rear wheel axle can be
drawn back in any suitable manner until the required degree of tension upon the
chain has been obtained, the whole being then tightened up, firmly securing the
parts together and effectually preventing any slipping of the rear wheel axle.
Fig. 7 illustrates a slightly modified form of this invention in which the teeth <
of the rack are cut upon or formed integrally with the back forks f, the washer g
being the only loose and detachable portion of the device.

page_text: Having now particularly described and ascertained the nature of our said
invention, and in what manner the same is to be performed we declare that what
we claim is:
-
The new or improved chain adjusting device comprising a frame or rack a
designed to be applied to or formed integrally with the back forks f of a velocipede
and furnished with serrations or teeth b upon its front surface in combination
with the washer g furnished with reversely cut teeth or serrations b¹ upon its under
surface and with a guiding or sliding block h taking between the arms a¹, a¹, of
the frame or rack a, substantially as herein described and shown, and for the
purposes specified.
F. G. CASSELL,
(Of Cassell & Co.), 22, Glasshouse Street, Regent Street, London, W.,
Agent for the Applicants.