An Improved Driving Chain for Cycles, and other purposes.
Year: 1895

page_text: Date of Application, 8th June, 1895-Accepted, 13th July, 1895
COMPLETE SPECIFICATION.
An Improved Driving Chain for Cycles, and other purposes.
I, ADOLF MERTENS of No. 67 Lützowstrasse, Berlin, in the Kingdom of
Prussia and Empire of Germany 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 :-
My invention relates to an improvement in driving chains of that class, in which
a series of links, each having a transverse bore both at the forward and at the
rear end, are connected by studs or pins traversing said bores, to flat side plates
provided with holes to receive the ends of said connecting studs. In the usual
construction of chains of this kind, the said studs or pins are riveted at both ends,
and to prevent a premature wear and tear of the said studs, short tubular sleeves
are provided to surround each stud, forming a bush between the said studs and the
inside surface of the cylindrical bore of the links. The said sleeves or bushes, in
general, are loosely mounted on the stud and susceptible of freely turning on the
same; but as this, in practice, has been found objectionable, means have been
provided for preventing the said sleeves turning on the studs, said means consisting
in providing the ends of said sleeves with a pin or tooth, or a number of teeth,
engaging into notches made in the side flanges or plates of the chain.
My invention consists in providing an improved construction of a stud and sleeve
to prevent the said sleeve turning on the stud. To obtain this result, I provide
the said stud with a longitudinal groove and the sleeve with a corresponding
indentation, extending through the width of the shell or part of the width; and
by slipping the sleeve on to the stud so as to make the indentation of the sleeve
fit into the groove of the stud, the said sleeve will be prevented from turning on
the stud.
To make my invention more fully understood, I will describe the same with
reference to the accompanying drawings, in which
Figure 1 is a side elevation of a piece of chain constructed according to this
invention,
Figure 2 is a plan of the same,
Figure 3 shows, drawn to a larger scale, the stud with its groove in front and
the surrounding shell in section.
Figure 4 is a sectional side elevation of the stud and sleeve, and
Figure 5 a transverse section of the stud and sleeve.
A are the links of well-known shape, and construction, having a transverse
bore a, at each end; B are the flat side plates, connected to the links A by
studs C, surrounded by metal sleeves or bushes D, extending through the width of
the links A. As clearly illustrated by Figures 1, 3 and 4, each stud C has a longi-
tudinal groove c, and into said groove engages a corresponding indentation d of the
shell D, as shown in Figure 5, thus preventing the said shell or sleeve D from
turning on the stud C. It will be readily understood, that the link A may freely
turn on the sleeve D, as required, but that the sleeve D, cannot turn on the
stud C.
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
1 claim is :-
In a driving chain consisting of a series of links having transverse bores and

page_text: connected to side plates by studs, traversing said bores, the combination, with the
said studs, constructed with longitudinal grooves, of sleeves or bushes engaging
said grooves with a corresponding indentation, substantially as and for the purpose
described.
Dated thie 7th day of June 1895
WM. P. THOMPSON & Co.,
Of 6 Lord Street, Liverpool, Agents for the Applicant.