Year: 1897

page_text: J
I, HARRY TAYLOR TURNOR, of Icknield Port Road, in the City of Birmingham,
Managing Director, do hereby declare the nature of this invention to be as
follows:-
This invention has reference to drive chain for communicating motion in cycles
and other carriages and machinery, and consists in a new method of making or
producing a certain part of such chain, to wit, the intermediate block links, which
are connected to the alternate pairs of cheeks or side plates by rivetted cross
Heretofore, the block links of drive chain have been macumen up
and the rivet holes have had to be separately drilled, but according to my im-
provements the said links are fashioned from short cut-off lengths of steel tubing,
operated upon between dies or by other tools to give the desired figure thereto.
In carrying out my invention in connection with the manufacture or production
of a block link of the shape of a figure 8, that is a block with rounded ends,
opposite concave sinkings or transverse channels on the top and bottom sides
and rivet holes through each end separated by the solid waist, I cut from a
length of seamless steel tubing, of suitable diameter and thickness, a piece of a
length corresponding to the width of the block-link required. This short ring-
link length is first slightly flattened out upon its top and bottom sides, thus
increasing its length and imparting to it an oval figure. Then by suitable tools,
the middles of the top and bottom sides are forced inwards or transversely con-
caved until the middle opposite inside parts come together, the rounded shape
of the ends and the correct size of the rivet holes being preserved, if necessary,
by inserted pegs, mandrils or other means.
In producing a block link with a transverse concavity on the underside only,
and a flat top, I proceed in a like manner as before described, other than that
only one side of the flattened tubular length is channelled across, the other side
being ground or machined perfectly flat.
By making the block links of drive chain according to my invention, the cost
of production' is very much reduced.
1000

page_text: İ, HARRY TAYLOR TURNOR, of Icknield Port Road, in the City of Birmingham,
Managing Director, 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:-
This invention relates to the intermediate block links of drive chain made from
cut-off short lengths of seamless steel tubing or from cupped blanks, and usually
employed in conjunction with alternate side links or plates in making up a
length of chain.
In
These block links have heretofore been made of the shape corresponding to the
general figure of an hour glass by taking a short length of tubing, of an elongated
cross section, and gathering in the opposite walls of the middle part, thereby
decreasing the length of the link and forming the ends into separated transverse
sleeves or eyes wherethrough the joining-up pins or rivets of the chain pass.
consequence of the figure thus given to them, the sides of the link are unsupported
against distension when tensile strain or longitudinal pull is put upon it, although
true that the tendency of the link to straighten out and resume its original
shape is, to a limited extent, neutralized by the hardening of the metal after the
desired figure has been given to it.
it
Now according to my invention, such tendency of the sides of the link to distend
or straighten is entirely remedied by constructing the link in such a manner that
one side of the same is directed in right line, so as to form a stay or tie against
the distension of the other side.
Figure 1 of the accompanying drawing represents a longitudinal section of a
length of drive chain, the intermediate block links of which are constructed
according to my invention.
Figure 2 is a topside plan of the same.
Figure 3 is an elevation of one of the said block links separately. Figure 4 is
an underside plan and Figure 5 a topside plan of the same.
The said block ink a, consists of a straight tie or stay side a', with circular
ends a², and a gathered-in side a³, forming a flat face against the other, the point
of junction between the two sides being at one side of the centre-lime of the link;
the gathered-in side has circular sleeves, holes or eyes at, wherethrough the
joining up pins or rivets b, pass in connecting up the said links a, to the alternate
side plates c, as represented in Figure 1.
The said block links may be made by blanks, Figure 6, cut off from a length
of seamless or solid drawn tubing Figure 7, which are flattened to give them the
shape shown in Figure 8. One side of the elongated blank is then gathered in
or pressed inwards, until the opposite middle parts of the same abut or come
together at one side of the centre-line of the link, which is thus completed, and
after which the metal is hardened.
as
Instead of making the links from short lengths of seamless steel tubing
described, they may be made from a disc or circular steel blank, Figure 9, which
is cupped to the form represented in Figure 10, after which the bottom is knocked
out as represented in Figure 11, and then the short tubular length thus formed
is operated upon to produce the required link in the same way as described in
the preceding arrangement.
To increase the resisting power of the tie side of the link, the metal at the walls
of the tube may be made thicker at one side than the other, which thickened side
"

page_text: is arranged to constitute the straight aide or longitudinal tie of the link and by
which the greater part of the strain is borne.
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:-
1. A drive-chain block-link of seamless metal tubing having one side straight
or flat and the other pressed inwards until it touches it and forms a flat face against
it the point of junction between the two sides being at one side of the centre-line
of the link.
2. The improved links of drive chain, substantially as described and set forth.
Dated this 21st day of December 1
HARRY TAYLOR TURNOR.
Boult & Wade,
Agents for Applicant.