Improvements in Driving Chains suitable for Velocipedes and other purposes, and Mud Guards for Protecting same.
Year: 1895

page_text: Date of Application, 14th May, 1895
Complete Specification Left, 12th Feb., 1896-Accepted, 25th Apr., 1898
PROVISIONAL SPECIFICATION.
Improvements in Driving Chains suitable for Velocipedes and other
purposes, and Mud Guards for Protecting same.
JOHN WARDEN BAIRD Pilmore Pencaitland East Lothian NB Engineer do
bereby declare the nature of this invention to be as follows :-
:-
The object of this invention is to construct a close linked chain for the prevention
of mud clogging the chain and pinions. The chain is constructed as follows. The
spaces which the pinion teeth gear into are covered, the covered spaces along with
the side links are formed of one piece of metal. Alternately cach link is large
enough to admit the ends of the corresponding intermediate link, the ends of the
links are kept separate by collars through which rivets are inserted, thus binding
the links together and forming a continuous chain. The mud guards for protecting
the cham between the pinious can be made either single or double, that is, one
placed above the lower side of the chain and the other placed below the upper side
of the chain; or in the double form one placed immediately above and below the
lower & upper sides of chain. Mud guards may also be placed on both faces of
the gear pious.
Dated thus Thirteenth day of May 1895.
Improvements in Driving Chains suitable for Velocipedes and other
purposes, and Mud Guards for Protecting same.
1, JOHN WARDEN BAIRD of 28 Melville Street, Portobello, Mid-Lothian N.B.
formerly of Pilmore, Peucaitland, East Lothian N.B. 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:-
The object of this invention is to construct a driving chain which is mud proof
on its outer or exposed surface, and which 18 protected on its inuer surface, by
one, or more mud guards. By this system mud is prevented from enteung the
inside of the chain, to clog it, and the chain wheels. And in order that my said
invention and the manner of performing or carrying same into practice may be
properly understood, I have hereunto appended an explanatory sheet of drawings
in which the same reference letters are used to indicate corresponding parts in all
the figures where shown.
Figure 1 is a transverse section through the new construction of chain link and
arched mud guard.
Figure 2, is a plan view of part of a chain as formed in accordance with my
improvements, the crossed full lines representing the covered parts of links.
Figure 3, is a side view corresponding to Figure 2, the covered link parts as in
Figure 1, being shown on under surface. And
Figure 4, is a general sude elevation showing my improvements as applied to a
DQ1

page_text: safety bicycle. In this figure the position of the chain is shown by two parallel
lines, the dotted parts indicating where it passes through the mud guard.
Referring to these drawings:-By my improvements the side plates or links a of
the chain are covered at a and the covers a' along with the side platos a are
preferably stamped from one piece of steel, or other suitable material; as
particularly shown in Figures 1 and 2. but the chain covers a' may be made
separate from the side plates a. and attached to them by means of soldor, or these
separate covers may be sprung over or attached in any other suitable way to the
Bide links of existing chains of the usual open linked make: thus converting them
into covered linked chains. The teeth of the chain wheels A. A' work against the ends
of the block links b. nearly touching the coveis a' and not quite filling the spaces
within the covered links a A lubricant for the chain and its wheels may he
placed in the corners formed by the covered links a and the ends of the block links b,
and in such a position it will last well, diminish friction, and lengthen the wear of
the parts. The block links which the side links a are riveted to, are of the same
kind with eyes at each end, as those commonly used in an open linked chain.
This covered linked system can also be applied to chains of the roller type pattern,
and other driving chains of ordinary construction. Between the chain wheels A. A',
over that part of the chain which is next the road, is an arched mud guard C,
within which the chain runs. This guard is attached to one of the back stays C¹
of cycle by means of two brackets C and extends so as to protect a portion of
the teeth of the large chain wheel A; the rest of the teeth of this wheel A not
shown in the drawings, and those of the small chain wheel A' are protected from
mud by the covered luked chain a. a', which forms a mud guard of itself when
moving with its covered surface a¹ upwards. The open side of the chain next the
road is protected from mud, by means of the arched guard C. which intercepts
mud from falling into the open spaces of the chain. From actual experience
I find it is unnecessary to protect with a guard the open side of the upper half of
the chain, as it appears to work quite clean unprotected. Motor carriages and
cycles can also use this covered linked chain and guard with the same advantages
as common cycles.
Having now particularly described and ascertained the nature of my said inven-
tion, and in what manner the same 18.to be performed, I declare that what I
claim 18:-
The combination of a covered linked driving chain, along with one, or more mud
guards, substantially as described and illustrated in the annexed drawings.
Dated this Eighth der of February 1896.
JOHN WARDEN BAIRD.
W. R. M. Thomson & Co.,
96 Buchanan Street, Glasgow, Agents.