Improvements in Chains for Driving Cycles and other Mechanism.
Year: 1899

page_text: Date of Application, 8th Sept., 1899-Accepted, 21st Oct.,
1899
COMPLETE SPECIFICATION.
Improvements in Chains for Driving Cycles and other Mechanism.
I, CHARLES HENRY BRAMPTON, of Sutton Coldfield, in the County of Warwick,
Gentleman, do hereby declare the nature of my said invention and in what
manner the same is to be performed to be particularly described and ascer-
tained in and by the following statement:-
-
My invention has for its object improvements in chains for driving cycles
and other mechanism which are more easily constructed and more substantial
than the chains now generally used. The constant tendency in the construc-
tion of chains for some time has been to attenuate the proportions especially in
regard to the width and diameters of the rivets and my invention is intended to
relieve to a certain extent this tendency without increasing the external sizes
of the parts constituting the chain as a whole.
In order that my invention may be clearly understood and more easily carried
into practical effect I have appended hereunto a double sized sheet of drawings
upon which I have illustrated several forms of my invention the illustrations
being made for the sake of clearness to a larger scale than those used for bicycles
but these chains may be made to any size and of any desired metal or material
and of any desired hardness or temper in the various constituent parts to suit
the particular purpose for which the chains are to be used.
Figure 1 is a plan view of several links of a chain shewing the parts assembled
together.
Figure 2 is a part sectional plan and part plan of a similar length of chain to
that shewn by Figure 1 with the parts also assembled.
Figure 3 shews a part plan and part section of a short piece of chain illustrat-
ing a modification in the form of the roller R.
Figure 4 is a similar part section and part plan to Figure 3 shewing a further
modification in the shape of the roller R.
Figure 5 is a plan of one of the inner links B.
Figure 6 is a side elevation of one of the links B.
Figures 7 are section, plan, and side view, of the rollers R as assembled and
shewn in section at Figure 2.
My new chain as seen at Figure 1 is very much like the chains at present in
use as regards appearance consisting of the outer links A the inner links B the
rollers R and the rivets S. On reference however to Figure 2 it will be seen
that the roller R in section is of peculiar shape having an internal flange r¹ with
the projecting rings 3 mounted upon the annular rings 6 of the links B as will
be better seen at Figures 5 and 6. That is to say the rollers R are so made that
the rings revolve easily upon the projections 6 of the inner links B with the
inner rib bearing upon the pin or rivet S or nearly bearing thereon which
will depend somewhat upon the particular shape in section of the roller R. For
instance the roller R at Figure 4 is rounded internally at 5 leaving a space K
between itself and the rivet S and its bearing upon the shoulder is somewhat
nclined or conical as is clearly seen at Figure 4. Also at Figure 3 the bearing
of the roller is conical at but it finishes with the internal rib³ very similar

page_text: in shape to the rib r of Figure 2. The object in each of the modifications is
to secure a substantial section or the roller R which will not be likely to be
affected by the continual pressure or hammering upon the teeth of the sprocket
wheels as is now the case with rollers if they are of wrong temper and indeed
this tendency always exists and my invention is intended to obviate it by giving
a substantial bearing on the enlargements 6 of the inner links B with the inner
swells or ribs 135 or the like. By this construction an inner tube or sleeve
around the rivet. and upon which the usual roller works is not necessary and I
am thus able to increase the diameter of the rivets S or to increase the thickness
of the rollers R at the ends bearing upon the faces of the inner links B. The
spaces K seen in sections Figures 2, 3 and 4 may be more or less as desired and
in work would probably be found to be generally filled up with lubricating
matter.
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
I claim is :-
CLAIMS.
First: The improvements in chains for driving cycles and other machinery
of a combination of parts A, B, R, and S all formed and constructed substan-
tially as herein set forth and illustrated upon the accompanying drawings.
Second: In roller driving chains forming the rollers R with an internal rib
or projection such as 13 or the like the ends of the rollers fitting and turning
upon projections of the inner links B substantially as herein set forth and
illustrated by Figures 2 to 7 of the accompanying drawings.
Thatod thin 741 lov
J
1000
CHARLES HENRY BRAMPTON.
By George Barker,
Fellow of the Chartered Institute of Patent Agents,
Agent for Applicant, 77, Colmore Row, Birmingham.