Figs. 1 to 10 show the progressive stages in the manufacture of the
chain, and the remaining figures show the series of tools that are
employed.
The general method of operation of making stayed chains according to
my invention is so far similar to the methods heretofore proposed for
making unstayed chains from the bar of cruciform section that the
links are formed alternately out of the one and the other pair of
diametrically opposite webs of the rod, the links, when severed and
completed, being already enchained together at the time of their
formation. The successive operations differ, however, in many
important practical respects from those heretofore proposed, as will
appear from the following detailed description of the successive steps
in the process illustrated by Figs. 1 to 10.
I will distinguish the one pair of diametrically opposite webs of the
bar and the notches and mortises punched therein and the links formed
therefrom from the other pair by an index figure 1 affixed to the
reference letters appertaining thereto.
_a a_ are one pair of diametrically opposite webs, and _a' a'_ the
other pair of webs of the bar.
[Illustration: Figures 2_a-_b, 6_a_, 4_a-b_, 7 _a-b_ and 10 _a-b_
MANUFACTURE OF WELDLESS CHAINS]
The first operation illustrated in Fig.
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