Improvements in Driving Chains for Velocipedes, Motor Cars, and other purposes, and in the Manufacture of the same.
Year: 1897

page_text: Date of Application, 13th Apr., 1897-Accepted, 15th May, 1897
COMPLETE SPECIFICATION.
Improvements in Driving Chains for Velocipedes, Motor Cars, and
other purposes, and in the Manufacture of the same.
I, EDWIN TAYLOR, of 1, Alfred Street, Warstone Lane, Birmingham, in the
County of Warwick, Stamper and Piercer, do hereby declare the nature of my said
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 has for its object improvements in driving chains for velocipedes,
motor cars, and other purposes and in the manufacture of the same, by which I am
enabled to connect the links together without rivetting the ends of the connecting
pins which pins can be made from hardened steel wire or from soft metal and case
hardened afterwards.
In order that my invention may be clearly understood and easily carried into
practical effect I have appended hereunto a double sized sheet of drawings upon which
I have illustrated examples of my improved driving chains.
Figure 1 is an elevation of one of the side plates of my driving chain.
Figure 2 is a plan view of same.
Figure 3 is an enlarged view of one of the connecting pins made according to my
invention.
Figures 4 and 5 are similar views to Figure 3 showing modified forms of the
connecting pin.
Figure 6 is a part sectional plan view of a portion of a driving chain constructed
according to my invention showing some of the side plates loose and some fixed.
Figure 7 shows one of the side plates with an inner hardened steel plate.
Figure 8 is a sectional elevation showing part of one form of tool for securing the
plates to the connecting pins.
In carrying my invention into practice I pierce the side plates A of my driving chain
so that the edges of the holes a' are bulged upwards and the connecting pins B have a
groove or grooves b' formed near each end. These connecting pins may be made from
hardened steel wire or may be case hardened after the groove or grooves have been
formed in them. In some cases I may reduce the ends so as to form the shoulders b³
for the side plates when fixed in position to butt against and then form the groove or
grooves bas clearly shown at Figure 5. When connecting the links of the chain
together the connecting pins are inserted through the block C and through the
holes a¹ in the side plates. The edges of these holes are then forced into the
groove by means of a such like tool as T shown at Figure 8 by which means
the links are securely held together without rivetting, thus enabling the connecting
pins to be made from hardened steel wire, or the connecting pins may be hardened
after the groove or grooves have been turned or otherwise formed at the ends. Or I
may insert the connecting pins into the blocks and form a small head on each end
before hardening and afterwards harden the pins and blocks together and then fix
the side plates on in the manner as hereinbefore described. The edges of the holes in
the side plates may be forced into the groove or grooves of the connecting pins
without being previously bulged.
In some cases I may use the hardened inner side plate D which is made from thin
steel and inserted between the ordinary side plate A so as to reduce the wear.
One
of the holes through which the connecting pin passes is elongated as shown at d'
Figure 7 so as to compensate for the stretching of the outer soft side plates. This

page_text: nardened inner side plate may be applied to driving chains as at present constructed.
Instead of the hardened inner side plate D I may use hardened washers placed
between the connecting pins and blocks and the side plates.
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 :-
CLAIMS.
First. In driving chains for velocipedes, motor cars, and other purposes connecting
the links together by forcing the edges, whether bulged upwards or not, of the holes
in the side plates through which the ends of the connecting pins pass into a recess or
recesses formed on the ends of such pins in the manner substantially as hereinbefore
described and as shown upon the accompanying sheet of drawings.
Second. In driving chains for velocipedes, motor cars and other purposes inserting
hardened steel side plates or washers between the blocks and the ordinary side plates
in the manner and for the purpose substantially as hereinbefore described and as shown
upon the accompanying sheet of drawings.
Third. The improvements in driving chains for velocipedes, motor cars, and other
purposes substantially as herein before described and as shown upon the accompanying
sheet of drawings.
*** Dated this Ninth day of Anril 1807
GEORGE BARKER,
77, Colmore Row, Birmingham, Agent for Applicant.