Improvements relating to Cycle and other Driving Chains.
Year: 1897

page_text: Date of Application, 20th Nov., 1897
Complete Specification Left, 5th Aug., 1898-Accepted, 10th Sept., 1898
PROVISIONAL SPECIFICATION.
Improvements relating to Cycle and other Driving Chains.
I, CHARLES RILEY GARRARD, of Magneto Works, 107, Ryland Street, in the
City of Birmingham, Engineer, do hereby declare the nature of this invention
to be as follows:-
This invention consists of improvements relating to cycle and other driving
chains, my object being to provide simple and effective means whereby the sleeves
connecting the inner side plates and on which the rollers or blocks are mounted
can be effectually secured within such plates.
My invention comprises the knurling, milling, stamping, or impressing of teeth
or serrations on the portion of the tubes or sleeves which fit within the side plates.
In the application of my invention to sleeves formed from a strip of sheet steel
I knurl or impress the teeth along each edge on one side of the strip, and the
strip is subsequently rolled or made into a tubular form with such knurled edges
on its outer surface. The holes in the inner side plates to receive the sleeve ends
are of a plain circular form and preferably somewhat smaller in diameter than the
external diameter of the sleeve ends. But as the sleeve is hardened whilst
the links or side plates are comparativly soft, the sleeve ends can be forced into
the plates the knurled surfaces enabling them to cut their way and to effectually
prevent movement when in position.
Instead of making the sleeves from metal strip I sometimes make them from
circular rods, knurling the portions fitting into the links or side plates for the
purpose herein before described.
I sometimes make the sleeve or tube ends slightly tapered or conical to obtain
a greater grip or hold in the side plates or links.
Improvements relating to Cycle and other Driving Chains.
I, CHARLES RILEY GARRARD, of Magneto Works, 107, Ryland Street, in the
City of Birmingham, Engineer, 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:
This invention consists of improvements relating to cycle and other driving

page_text: chains, my object being to provide simple and effective means whereby the sleeves
connecting the inner side plates and on which the rollers or blocks are mounted
can be readily secured within such plates.
My invention comprises the knurling, milling, stamping, or impressing of teeth
or serrations on the portions of the tubes or sleeves which fit within the side plates.
In the application of my invention to sleeves formed from a strip of sheet steel
I knurl or impress the teeth along each edge in one side of the strip, and such
strip I subsequently roll or make into a tubular form with the knurled edges on
its outer surface. The holes in the inner side plates to receive the sleeve ends are
of a plain circular form and preferably somewhat smaller in diameter than the
external diameter of the sleeve ends. But as the sleeve is hardened whilst the
links or side plates are comparatively soft, the sleeve ends can be forced into
the plates the knurled or milled surfaces enabling them to cut their way and to
effectually prevent movement when in position.
Instead of making the sleeves from metal strip I sometimes make them from
circular hollow rods, or tubes, knurling or milling the portions fitting into the
links or side plates for the purpose hereinbefore described.
I sometimes make the sleeve or tube ends slightly tapered or conical to obtain
a greater grip or hold in the side plates or links.
In the accompanying sheet of explanatory drawings.―
Figure 1 is a side elevation and Figure 2 an end elevation representing, to an
enlarged scale, a knurled or milled strip, whilst Figures 3 and 4 show my chain
link sleeve as produced from such a strip.
Figure 5 is a sectional plan, to a smaller scale, showing one of a pair of chain
links or side plates having my improved sleeve fitted thereto in the manner herein-
before described.
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
The improvements relating to cycle and other driving chains comprising the
knurling, milling, stamping, or impressing of teeth or serrations on the portions
of the tubes or sleeves which fit within the side plates, substantially as and for
the purpose described and as illustrated.
Dated th
41
T
2
3000
MARKS & CLERK,
18, Southampton Buildings, London, W.C., and
13, Temple Street, Birmingham, Agents for the Applicant.