Improvements in the Manufacture of Weldless Chains.
Year: 1889

page_text: Date of Application, 30th July, 1889-Accepted, 28th Sept., 1889
COMPLETE SPECIFICATION.
Improvements in the Manufacture of Weldless Chains.
I, HIPPOLYTE RONGLER of 18 Bath Row, Birmingham in the County of Warwick,
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 :-
My Invention relates to an improvement in the manufacture of weldless stayed-
chains from the bar of cruciform section, according to the process forming the subject
of a previous application for Letters Patent dated January 8th 1889, No. 370, and my
present improvement has for its object to enable the weldless stayed links to be made
as short and particularly as narrow as may be necessary in order to adapt the chain to
run over the sheaves of pulley blocks, and to suit other purposes for which short link,
welded chain has heretofore only been available.
In the manufacture of chains by the aforesaid process of punching, there is a
practical minimum limit for the dimensions of the punches which cannot be reduced
without compromising their efficiency, and consequently the width (and therefore the
length) of the link must necessarily bear a certain proportion to the thickness of the
web of metal out of which it is formed; since the breath of the link depends on
the length of the cross stay which is determined by the breadth of the mortises forming
the eyes of the link.
My present improvement enables these dimensions to be reduced without reducing the
dimensions and consequently the efficiency of the punches which form the eyes of the
link. The improvement involves a modification in what I have designated the fifth
operation of my aforesaid process, and it consists in punching out the middle of the
cross stay (so as to leave only two short stumps jutting inwards from the side members
of the link) this operation serving to interrupt the continuity of the core, which was
the object of the fifth operation.
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For this purpose I substitute for the pair of punches illustrated in Figures 5ª and 5°
of my previous specification, a single punch which removes that part of the corc of
the cruciform bar which is situated at the middle of the strut. This tool is represented
in Figure 1 of the accompanying drawings which figure also shows the effect of its
operation. Figure 2 shows the finished link. The subsequent operations designated
in my aforesaid specification the sixth, seventh, eighth, and ninth operations, are
performed, as therein described, but the tenth operation has the effect of closing
together the two stumps g g until they abut together at the middle of the link, and
together constitute a cross strut or stay which prevents any further lateral collapse of
the link. In the operation of closing up the gap between the stumps g 9. the link is
brought to the narrow form shown in Figure 2, the eyes of the links being only just
wide enough to receive the end of the adjacent link enchained therewith without
gripping it. This operation is performed by a tool similar to that shown in
Figures 10 10 of my aforesaid specification.
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,
In the process of manufacturing weldless-stayed chains from a bar of cruciform
Luisting and stamning onorations horain

page_text: referred to, the method of narrowing the width of the link by punching out the middle
of the cross stay, and subsequently contracting the width by lateral pressure so as to
bring the stumps together to form the cross stay, as described.
Darved oils oven uay ошу 1000.
H. RONGIER.
By A. M. & Wm. Clark,
53 Chancery Lane, London, Patent Agents: