Improvements in and relating to Driving Chains.
Year: 1892

page_text: Date of Application, 11th Mar., 1892
Complete Specification Left, 12th Dec., 1892-Accepted, 14th Jan., 1893
PROVISIONAL SPECIFICATION.
Improvements in and relating to Driving Chains.
We GEORGE LEONARD MORRIS, WILLIAM THOMAS WILSON, and NATHANIEL
HENRY STRICKLAND, trading as G. L. Morris Wilson & Co., of 66 Turnmill
Street in the City and County of London, Cycle Manufacturers, and HARRY
PARSONS of 20 Guildford Street Russell Square, London, Engineer, do hereby
declare the nature of our said invention to be as follows:
Our invention relates to an improved construction of pitch chain for chain driving
gear, more particularly adapted for cycles, and it has for its object increased pitch
and therefore a reduction of the number of wearing parts.
According to our invention every link is alike, one end of one link being adapted"
to fit within the other end of each other link, one end of each link being a boss
and the other end being a fork or crutch. These two ends may be connected by
either a single bar or by a pair of bars which are their preferably extensions of the
fork or crutch. To prevent the sides of the forks or crutches closing up as the
connecting pins are rivetted up, the eyes of the bosses are provided with bushes
which keep the sides of the forks or crutches apart. These bushes then become
parts of the pins and as they are loose they may readily be suitably hardened.
thus allowing the rivets or pins to be soft and facilitating the making up of
the chain.
Dated this 10th day of March 1892.
ROBT. ED. PHILLIPS, M.I.M.E.,
70, Chancery Lane, London, W.C., Agent for the Applicants.
COMPLETE SPECIFICATION.
Improvements in and relating to Driving Chains.
We GEORGE LEONARD MORRIS, WILLIAM THOMAS WILSON and NATHANIEL
HENRY STRICKLAND trading as G. L. Morris Wilson & Co. of 66 Turnmill
Street, in the City and County of London, Cycle Manufacturers, and HARRY
PARSONS of 20 Guildford Street, Russell Square, London, 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 :-
Our invention relates to an improved construction of pitch chain for chain driving
gear, particularly adapted for use on cycles.
According to our invention every link is alike one end of each link being a male
end and the other end a female end the one end of each being adapted to engage with
the other end of a similar link and so on. The one end of each link is a boss and
the other end is a fork or crutch. These two ends of the link may be connected
either by a single bar or by a pair of bars, in the latter case they are preferably
extensions of the fork or crutch. To prevent the sides of the forks or crutches
closing up as the connecting pins are rivetted up, the eyes of the bosses are
provided with bushes which keep the sides of the forks or crutches apart. As
these bushes are loose they may be readily suitably hardened, thus allowing the
rivets or pins to be soft which facilitates the making up of the chain.
In the accompanying drawing which illustrates some methods of carrying our
invention into practical effect :-
Figures 1 and 2 are broken views in side elevation and plan respectively

page_text: showing our improved construction of chain with the centre part of each link in the
form of a single bar.
Figures 3 and 4 are broken views in side elevation and plan respectively
showing our improved construction of chain with the centre part of each link
formed by two bars.
Figures 5 and 6 are broken views in side elevation and plan respectively showing
a modification of the construction shown by Figures 3 and 4 and,
Figure 7 is a broken view in plan showing how the links may be made in two
halves for convenience of manufacture.
Throughout the several views similar parts are marked with like letters of
reference.
:
Referring to the drawing each link is alike having at one end a boss A and at
the other end a fork or crutch A the boss of one link being adapted to engage
with the fork or crutch of another..link, the two being fulcrated together by a
transverse pin a. The two ends of the link may be connected either by a single
bar A as shown by Figures 1 and 2, or by a pair of bars A2, A2, as shown by
Figures, 3, 4, 5, 6, and 7. These side bars may if desired be connected by a cross
bar or stay a as shown by Figures 3 and 4. When two side bars are used we
prefer to recess the boss A to allow the chain to be of one uniform exterior width
as shown by Figure 6. The link may.for convenience in construction be divided
longitudinally into two parts by splitting the boss A as shown by Figure 7.
The pins a are preferably passed through hardened bushes a' as illustrated by
the drawing.
This chain is mounted on the chain wheels so it travels in the direction
shown by the arrows on the drawing and thus drives from the forward side of
the bosses A..
Having now particularly described and ascertained the nature of our said inven-
tion and in what manner the same is to be performed we declare that what we
claim is :
:=
The improved construction of driving chain, as hereinbefore described and
illustrated by the accompanying drawing.