Year: 1887

page_text: Date of Application, 28th July, 1887
Complete Left, 21st Apr., 1888
Complete Accepted, 22nd June, 1888
We HARRY FISHER, Manchester Road Sheffield in the County of York, Merchant,
and JOHN HARRISON of Castle Bytham in the County of Lincoln, Engineer, do
hereby declare the nature of this invention to be as follows:-
This invention relates to improvements upon the drive chain described in the
Specification of Harrisons Patent No. 3681, of 1884, the object being to dispense
with the loose clip described therein, and to otherwise improve the chain.
The Hook or coupling which connects the links instead of being made separate as
described in Harrisons Patent, is made solid with, and forms part of each link, thus
all the links may be of one pattern, and are interchangeable, and couple together with
facility.
The links may be made of any suitable material, and of any size and shape, but
preferably rectangular, the coupling Hook being formed at one end.
The opening into the groove of the coupling hook is curved or irregularly shaped
so that the straight bar of the next link cannot be either lifted out or replaced without
raising the link to a position it would be impossible to attain in working.
The front internal face of the coupling hook on which adjacent link bears, is
straight, and so that the bar takes a bearing from end to end, but we prefer to make
the opposite side of the groove slightly curved or hollow, which enables the links to
be coupled together with great facility, and to be held closer together and in a more
compact form.
No indentation or other irregularity in the shape of the plain end of the link is
required to enable it to be passed into the groove of the coupling hook.
15h doy of July 1887
ROBT. F. DRURY,
Agent for the Applicants.

page_text: UI DIIve спап.
We HARRY FISHER, Manchester Road, Sheffield, in the County of York, Merchant,
and JOHN HARRISON of Castle Bytham, in the County of Lincoln 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:
This invention relates to improvements in the manufacture of drive chains, elevator
chains and other chains of similar character, being improvements upon the con-
struction of chain described in the Patent No. 3681, 1884, granted to the said John
Harrison, the object being to dispense with the loose intermediate clip described
therein, and otherwise to improve the chain; the said improved chain is detachable
link from link but is so constructed that the links cannot become detached when
in work.
The annexed sheet of drawing clearly illustrates our invention, and similar letters
of reference indicate similar parts in any of the figures in which they are repeated.
Fig. 1, represents two of our improved chain links coupled together, one side of
the mouth of the hook being curved, and the other side being provided with a
projecting bit.
Fig. 2, represents a similar pair of coupled links, with plain curvilinear openings
in the hooks.
In carrying our invention into practice, we may make the links of any suitable
shape or configuration, but usually they are made of a rectangular shape as shown,
having a plain bar at one end, and a hook at the other, into which the end bar of the
next link engages.
The sides A, and the end bars B, as shown in Fig. 1, are made of equal diameter
or thereabouts, and the mouth or opening C forming the inlet into the hook D, is
made curvilinear and slightly undercut on the side marked E, as indicated by the
dotted lines in the drawing, the front of the hook being made with a lip or pro-
jection F, and the inside or bearing face of the hook is so shaped that the bar of the
next link will bear against it from end to end.
To couple and uncouple the links, the lower link shown in the drawing is raised
until it is about at a right-angle to the upper link, when it may be withdrawn from
and again passed into the hook by a lateral sliding movement from either side; but
so long as it is in the position shown (which is the working position) the sides of the
hook will prevent any lateral or side movement, and the lip or projection F, prevents
the end-bar B, of the lower link becoming disengaged.
The same description will apply to the links shown in Fig. 2, with the exception
that both sides of the mouth or opening C, are made curvilinear, the lip F being
dispensed with.
Although we have stated that the side-bars and the end-bars are usually made of
uniform size we may vary the dimensions by making the end-bar B slightly larger

page_text: than the side bars A, by which increased strength, and a firmer fit is obtained; the
sides A may also if desired be made of an oval cross section as indicated in Fig. 2,
which will permit the mouth of the hook to be made proportionately smaller, but we
prefer to keep the side B, round (as also indicated) being the shape best suited for
the purpose.
Having thus particularly described and ascertained the nature of our said inven-
tion, and in what manner the same is to be performed, we declare that what we
claim is :-
1st. In the construction of the links of what are known as drive-chains, forming
one side of the opening into the hook curvilinear and slightly undercut, and the other
side provided with a lip, for the purpose specified, and substantially as described and
as shown in Fig. 1.
2nd. In the construction of drive-chain links, forming the opening into the hook,
with two curvilinear sides, for the purpose herein-before specified, and substantially as
described and as shown in Fig. 2.
3rd. A drive-chain link constructed as herein before described and claimed,
having the side-bars of an oval cross section, and the end-bar round for the purpose
specified.