Improvements in Driving Chains for Bicycles and other Vehicles.
Year: 1896

page_text: Date of Application, 27th May, 1896
Complete Specification Left, 18th Sept., 1896-Accepted, 31st Oct., 1896
PROVISIONAL SPECIFICATION.
Improvements in Driving Chains for Bicycles and other Vehicles.
I, JOHN MOORE of Fourth and Olive Street St. Louis, County of St. Louis,
Missouri, U.S.A., Manufacturer, do hereby declare the nature of this invention to
be as follows:
The driving chain of this invention is made with side links and middle links
the former having at each end a segmental hole and the latter a cylindrical hole.
The side links receive correspondingly segmental ends of the connecting pins,
which are securely fastened and rotation of the same prevented. The bearing
part of the connecting pins is also segmental and has a curved surface for the
reception of friction rollers or balls against which the middle links bear, the
bearing side being away from the centre of the middle link. The segment ends
of the connecting pins which fit into the side links would have the form
approximately of a half circle and the middle portion of the said pins the form of
approximately three quarters of a circle but these relative dimensions may be
varied. This arrangement of roller or ball bearings is designed to lessen friction
in working.
Dated this 27th day of May 1896.
THOMAS R. SHILLITO,
89 Chancery Lane, London, W.C., Agent for the Applicant.
Improvements in Driving Chains for Bicycles and other Vehicles.
I, JOHN MOORE of Fourth and Olive Street St. Louis, County of St. Louis,
Missouri, U.S.A., Manufacturer, 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 relates to driving chains which are employed in connection with
sprocket wheels and it has for object the production of a driving chain for
bicycles and other vehicles which works with less friction, and more easily, and is
more durable than the chains hitherto used for a like purpose.
In the drawing Fig. 1 is a side view partly in section of the driving chain of
this invention. Fig. 2 a plan view partly in section of the same. Figs. 3, 4, 5,
enlarged views of details.
A are central, and B side links of pressed or stamped steel, said central links
having cylindrical holes a for the reception of a connecting pin C of the peculiar
construction hereinafter described. The side liuks B are provided at each end
with segmental holes b to receive similarly segmental ends of the pins C which
are afterwards securely fastened to prevent said pins from rotating.
The connecting and bearing pins C together with autifriction rollers D as more
clearly shewn in Figs. 3 to 5 forms the essential feature of the invention. The
pin comprises only about two thirds of a cylinder at the part in the central link

page_text: the remaining portion being cut away on its bearing side, which would be away
from the centre of the link A, to provide a longitudinal chamber c for a cylindrical
roller D. The bearing surface of this chamber is concentric with the centre of
the pin and with the cylindrical hole a, and the roller D being slightly larger in
diameter than the depth of the chamber will receive the entire bearing of the
link A on the pin. The lateral movement or displacement of the antifriction
rollers D is prevented by the side links B.
It is evident that the construction may to some extent be modified, as for
instance by substituting balls for rollers without departing from the spirit of the
invention.
Having now particularly described and ascertained the nature of my said inven-
tion and in what manner the same is to be performed, I declare that what I
claim is :-
1. The combination of the central links having two cylindrical holes, the side
links, the connecting pins having longitudinal chambers located on one side thereof
and the rollers of slightly larger diameter than the depth of the chambers, for the
purpose specified, substantially as described and shewn.
2. A driving chain for sprocket wheels having central links connected to side
links by a pin of segmental cross section secured in the side links against rotation,
and having a longitudinal chamber to receive an antifriction roller, of slightly
larger diameter than the depth of said chamber, adapted to bear against the surface
of the pin and adjacent surface of the pin hole, substantially as described and
.shewn.
Dated this 18th day of September 1896
THOMAS R. SHILLITO,
89 Chancery Lane, London, W.C., Agent for the Applicant.