Year: 1886

page_text: Date of Application, 12th July, 1886.
Complete Left, 12th Apr., 1887.
Complete Accepted, 31st May, 1887.
I, ARTHUR THOMAS BOON, of 17 Albemarle Street, St. John Street, Clerkenwell,
Watchmaker, do hereby declare the nature of my said invention to be as follows :-
The object of my invention is to manufacture an improved form and arrangement
of coupling; for uniting chains, ropes, cords, and other articles.
My improved coupling consists of two links, or two hooks, or one link and one
hook, or other suitable pair of attachments to the articles to be united or joined
together (herein after for the sake of brevity called "links"). To one of these links 1
attach (or form in one therewith) a cylinder, and to the other link I similarly attach a
sleeve or hollow cylinder; the latter fitting easily upon or outside the former. In
the hollow cylinder I make one two or more L slot or slots to form the well known
bayonet joint; and fit or form upon the cylinder of the first mentioned link one or
more projection or projections, to enter such slot or slots. I also provide a hole,
which passes through the cylinder and sleeve, (when united) through which hole Í
pass a split pin, key, spring key, or other article, which prevents the rotation of the
sleeve upon the cylinder, accidentally or otherwise, but no other strain is sustained by
the pin.
When it is desired to unite the links, the smaller cylinder is put into the sleeve;
then partially rotated therein, to engage the bayonet joint; the pin is then inserted to
secure the joint against accidental rotation, and the coupling of the article is effected ;
all the longitudinal strain being sustained by the bayonet joint.
By simply removing the pin and partially rotating the two links in opposite
directions, uncoupling is effected.
My improved coupling may be formed of any suitable material, according to the
character of the articles to be united, and may be also made in an ornamental manner
when desirable.
T
1000
GEO. DOWNING,
Agent for Applicant.

page_text: An Improved Coupling for Uniting Chains, Ropes, Cords, and
other Articles.
I, ARTHUR THOMAS BOON, of 17 Albemarle Street, St. John Street, Clerkenwell,
Watchmaker, 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 :-
The object of my invention is to manufacture an improved form and arrangement
of coupling, for uniting chains, ropes, cords, and other articles.
My improved coupling consists of two links, or two hooks, or one link and one
hook, or other suitable pair of attachments to the articles to be united or joined
together (herein after for the sake of brevity called "links"). To one of these links
I attach (or form in one therewith) a cylinder, and to the other link I similarly attach
a sleeve, or hollow cylinder, the latter fitting easily upon or outside the former. In
the hollow cylinder I make one, two or more L slot or slots to form the well known
bayonet joint and fit or form upon the cylinder of the first mentioned link one or more
projection or projections, to enter such slot or slots. I also provide a simple and
effectual means for preventing the rotation of the links, with respect to each other;
such means consisting of a split pin, key, spring key, or other equivalent device.
And in order that my said invention may be more particularly described and
ascertained, reference is hereby made to the accompanying drawings, in which similar
letters of reference indicate corresponding parts.
Figs. 1 and 2 are elevations of one form of my invention. Fig. 3 represents
another form. Fig. 4 is a section of the upper link of Figs. 1 and 2. Fig. 5 is an
elevation of the lower link of the same. Fig. 6 is a section of the upper link of Fig. 3.
Fig. 7 is an elevation of the lower link of the same, and Figs. 8, 9 and 10 are detail
views.
Referring to Figs. 1, 2, 4 and 5, a is the upper link, and b is the lower link. The
link a is cylindrical, and is bored to fit the spindle c of the lower link. The spindle c
is provided with two studs d d, which enter recesses e, and rest upon shoulders a¹,
when the links are united.
Referring to Figs. 3, 6 and 7, it will be seen that the links a and b are united in
the same manner as those shewn in Figs. 1, 2, 4 and 5; the only difference being in
the arrangements for preventing the accidental rotation of the link b in the link a
In Figs. 1, 2, 4 and 5 this is effected by the key or split pin f, which passes through
holes g in the link a and c¹ in the link 6. The key f may be secured against loss by
a chain (shewn by dotted lines in Fig. 2) or by other suitable means. In Figs. 3, 6
and 7 slots g¹ are formed in the link a. Another slot 2 is formed in the spindle c.
The spring keyf' shewn in Fig. 8 is fitted in the upper part of the link a; the guide
plates ii fit in the slots gl; the wings k k project beyond the cylindrical portion of a,
a spring m is inserted to press the key f₁ downwards into the slot c²; and the

page_text: plate n (Figs. 6 and 9) retains the spring in position. Fig. 9 is
line xy of Fig. 6, and Fig. 10 is a plan view of Fig. 7.
section on the
When the spindle c is inserted in a, the spring m yields to the pressure until the
studs d d have entered the recesses e, in which position the slot c² is in line with
the lip, which at once drops into c³, and secures the link 6 in the link a.
When releasing the links, the wings k k are raised by hand, while the link b is
partially rotated and withdrawn from the link a.
It is obvious that my improvements are adaptable to large and small articles, and
that much variation may be made in the general configuration and ornamentation of
the same, as well as in the materials used in their manufacture.
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. The manufacture and use of couplings consisting of the link a, bored to receive
the spindle c of the link b; the spindle c being fitted or provided with one or more
stud or studs d entering the recesses e, in the manner of a bayonet joint, and secured
against accidental rotation by spring or other keys ff, severally constructed and
operating substantially as herein before described and shewn on the drawings.
2. The general construction, arrangement and combination of the several and
respective parts, together constituting my invention of an improved coupling for
uniting chains, ropes, cords and other articles substantially as herein before
described and shewn on the drawings.
GEO. DOWNING,
Agent for Applicant.