Improvements in Driving Chains.
Year: 1893

page_text: ... +
Date of Application, 24th Jan., 1893
Complete Specification Left, 24th Oct., 1893-Accepted, 25th Nov., 1893
A PROVISIONAL SPECIFICATION.
Improvements in Driving Chains.
I GEORGE LEONARD MORRIS, of 15 Wells Street, Gray's Inn Road, in the
City and County of London, Cycle Manufacturer, do hereby declare the nature of
this invention to be as follows:-
:
. My invention relates to an improved construction of driving chain-particularly
adapted for use on velocipedes-and it consists in fulcrating the links to one
another in such a manner that the joints of the two parts are not visible on the top
and bottom parts of the chain but only at the sides thereof, the object being to
prevent the dirt and dust which lodges on the chain from working into the joints
thereof.
In carrying my invention into practical effect I form the engaging ends of the
links in the following manner: The solid ends of the links are provided with
circular recesses adapted to receive the double ends of the other links which fit in
the said recesses so that they are flush at the sides with the solid ends of the links,
suitable slots being cut in the lips formed by the recesses in the solid ends of the
links to allow the double ends of the other links to radiate to allow the chain to
accommodate itself to chain wheels of any size.
The double ends of the links are fulcrated to the solid ends of the links by the
usual transverse pins, either with or without bushes, or bushes may be formed on
the inner faces of the double ends of the links to form the fulcrating pins, the said
bushes being held together by means of rivets which may be made of soft metal as
they are subject to no wear.
My invention is applicable to all types of chains at present in use and I therefore
do not limit myself to any particular construction of link.
ROBT. ED. PHILLIPS, M.I.M.E.,
Consulting Engineer and Patent Agent,
70, Chancery Lane, London, W.C., Agent for the Applicant.
COMPLETE SPECIFICATION.
Improvements in Driving Chains,
I, GEORGE LEONARD MORRIS, of 15 Wells Street, Gray's Inn Road, in the
City, and County of London, Cycle 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 :-
My invention relates to an improved construction of driving chain (particularly
adapted for the chains used in driving velocipedes) and it consists in so fitting and
pivotting the ends of the links to one another that the alternate links are flush with
one another on the outside and the joints are not exposed on the top and bottom of
the chain, but only at the sides thereof, the object being to make the chain more
compact and to prevent the dust and dirt which lodges on the driving chain from
working into the joints thereof.
My invention is applicable to most of the various patterns of chains now inade,
and in order that my invention may be fully understood I will more particularly
describe it making reference to the accompanying drawing which illustrates iny
invention applied to some of the well-known patterns of chains. Throughout the
several figures similar parts are marked with like letters of reference.
Referring to Figures 1 and 2 which illustrate the application of my invention to
the "Humberpattern chain. I cut or form in each side of the bosses a a of the

page_text: solid links A a segmental slot a¹ of a depth equal to the thickness of the plates
forming the open links B, the slots a being of such a length that they will allow
sufficient radial movement between the links. The ends of the plates forming the
open links B either have bosses 6 on thein to form the pivotting pins to fit in the
transverse holes a a in the solid links A as shown by Figure 2, the two parts being
fixed together to form the open link by means of rivets passing through the
bosses bb. As a modification the two plates forming the open link may be fixed
together by means of an intermediate sleeve b, either with a roller b' as shown by
Figure 3, or without as shown by Figure 4.
Figures 5 and 6 illustrate the application of my invention to that pattern of chain
in which each link is alike and consists of two parts A, each alike, and each having
at one end a boss a with a transverse hole a² through it and having the segmental
slot a¹ in its outer face, and at the other end a boss b adapted to fit in the trans-
verse hole 2 in another link and having a hole through it for the fixing rivet x to'
pass through.
Figures 7 and 8 illustrate the application of my invention to that pattern of chain
in which the links are of two patterns. The one link A is an open link inade either
in one piece as shown or in two pieces for convenience of manufacture, and the other
link B is made in two parts. The link A has a boss a at each end through which is a
transverse hole a² and in each of which is the segmental slot a¹. The two parts
forming the link B have bosses b or their equivalents adapted to fit in the holes a²
in the other links and to be rivetted together by the rivets x.
Figures 9 and 10 illustrate the application of my invention to the " Abingdon'
pattern chain which is but a slight variation of the chain illustrated by Figures 5
and 6.
The essential feature of my invention is the recessing or letting of one end of a
link into the other and allowing it to radiate therein by means of the segmental
slots a', whereby the links of the chain are flush with each other on the outside,
and the joints of the links are hidden on the top and bottom of the chain, and it will
be obvious that the segmental slots are only made of such a size as the radiation of
the links demands.
I wish it to be understood that I lay no claim to any particular method of
forming the pivotal pins, or to any particular method of connecting or attaching
the two parts of the links together, but
Having now particularly described and ascertained the nature of my inven-
tion and in what manner the same is to be performed, I declare that what I
claim is :-
1. The improvements in driving chains substantially as hereinbefore described and
illustrated by the accompanying drawing.
2. In a driving chain, recessing the ends of the links into one another and slotting
the bosses of the recessed links so that all the links are flush on the outside and the
joints of the links are hidden on the top and bottom of the chain, as and for the
purpose set forth.
3. The improved construction of driving chain hereinbefore described and
illustrated by Figures 1, 2, 3 and 4 of the accompanying drawing.
4. The improved construction of driving chain hereinbefore described and
illustrated by Figures 5 and 6.
5. The improved construction of driving chain hereinbetore described and
illustrated by Figures 7 and 8.
6. The improved construction of driving chain hereinbefore described and
illustrated by Figures 9 and 10.
Dated this 24th day of October 1893.