Improvements in Fastenings Applicable for Securing Ropes and Chains to Hooks and other Articles and for Unions and other Purposes.
Year: 1886

page_text: Date of Application, 27th May, 1886.
Complete Left, 17th Feb., 1887.
Complete Accepted, 19th Apr., 1887.
DECEDU
Improvements in Fastenings Applicable for Securing Ropes and
Chains to Hooks and other Articles and for Unions and other
Purposes.
I LIONEL DOVE of No. 12 Chapel Street Forest Gate in the County of Essex
Engineer do hereby declare the nature of my said invention to be as follows:-
The object of my invention is to manufacture a simple fastening, applicable to pole-
crabs of carriages and wagons, unions, union links for chains, snatch-blocks, lifting
hooks of crabs and cranes, portions of rigging for ships, detaching gear for boats and
anchors, railway couplings, and many other useful purposes.
My improved fastening consists of a circular cap, hollowed out, and furnished with
lugs, which take into corresponding provisions on the stem or other portion of the link,
hook, or other article, forming thereby bayonet joint. This bayonet joint may be
either double or single, that is to say, so made as to become fixed when moved in one
direction only, or made capable of being fixed by either a right or left hand movement
of the cap; upon which movement the lugs take into and become wedged to the
undersides of the screw, diagonally, curved, or otherwise formed provisions made for
that purpose.
In applying my invention to the pole-crab of a carriage, the two hooks are formed
in one with a cylinder fitted to the end of the pole. A central stem projects forward,
between the two hooks. The outer end of this stem is fitted with two, three, or more
inclined planes, or flanges having helical or curved surfaces, the undersides of which
furnish the necessary bearing surfaces for the lugs of the cap. When the cap is placed
on the stem it is partially rotated, by the aid of a lever or otherwise, whereby it becomes
firmly wedged to the stud. The remainder of the cap covers the openings of the
hooks, and thus, by so covering such openings, prevents the curb chains from becoming
disengaged from the hooks.
In applying my invention to union links for joining chains, the union link is formed
with two hooks, to hook into the links of the chains to be united. A stem or stud is

page_text: provided between the two hooks, upon which the cap fits as herein before described,
and by which cap the openings in the link are covered, and the chains are safely united
together.
In some cases an intermediate stem or stud is dispensed with, and one horn of the
hook is so formed as to receive the cap, which closes the opening and secures the
connection.
The cap may be turned by means of a spanner, pin, lever, or other means.
It is obvious that by making slight modifications in my invention, it may be adapted
to snatch blocks, lifting hooks of crabs and cranes portions of rigging for ships,
detaching gear for boats, and anchors, railway couplings, and many other useful
purposes.

page_text: Improvements in Fastenings Applicable for Securing Ropes and
Chains to Hooks and other Articles, and for Unions and other
Purposes.
I, LIONEL DOVE, of Montague Buildings, West Road, West Ham in the County of
Essex, Engineer, 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 a simple fastening, applicable to pole-
crabs of carriages and wagons, unions, union links for chains, snatch-blocks, lifting
hooks of crabs and cranes, portions of rigging for ships, detaching gear for boats and
anchors, railway couplings and many other useful purposes.
My improved fastening consists of a circular cap, hollowed out, and furnished with
lugs, which take into corresponding provisions on the stem or other portion of the
link, hook, or other article, forming thereby a bayonet joint. This bayonet joint may
be either double or single that is to say, so made as to become fixed when moved in
one direction only, or made capable of being fixed by either a right or left hand
movement of the cap; upon which movement the lugs take into and become wedged
to the undersides of the screw, diagonal, curved, or otherwise formed provisions made
for that purpose.
In applying my invention to the pole crab of a carriage, the two hooks are formed
in one with a cylinder fitted to the end of the pole. A central stem projects forward,
between the two hooks. The outer end of this stem is. fitted with two, three or more,
inclined planes, or flanges having helical or curved surfaces, the undersides of which
furnish the necessary bearing surfaces for the lugs of the cap. When the cap is placed
on the stem, it is partially rotated, by the aid of a lever or otherwise, whereby it
becomes firmly wedged to the stud. The remainder of the cap covers the openings
of the hooks, and thus, by so covering such openings, prevents the curb chains from
becoming disengaged from the hooks.
In applying my invention to union links for joining chains, the union link is formed
with two hooks, to hook into the links of the chains, to be united. A stem or stud is
provided, between the two hooks, upon which the cap fits as hereinbefore described,
and by which cap the openings in the link are covered, and the chains are safely
united together.
In some cases an intermediate stem or stud is dispensed with, and one horn of the
hook is so formed as to receive the cap, which closes the opening and secures the
connection.
The cap may be turned by means of a spanner, pin, lever, or other means.
It is obvious that by making slight modifications in my invention, it may be adapted
to snatch blocks, lifting hooks of crabs and cranes, portions of rigging for ships,
detaching gear for boats and anchors, railway couplings and many other useful
purposes..

page_text: And in order that my said invention may be 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, partly in section, of the application of my invention to
pole crabs.
a is the cylinder which fits on to the end of the pole. is a central stem,
having inclined planes c c formed thereon, as shewn. dd are the two hooks.
e (Fig. 2) is the cap, having two lugs ff. These lugs are placed under the inclined
places cc, when the cap is placed in position, and a partial rotation secures it thereto.
Fig. 3 is a plan of the underside of the cap, and Fig. 4 is a section, on the line y of
Fig. 1. 99 are spaces provided for the passage of the lugs ff between the two
inclined planes c c.
Fig. 5 and 6 are elevations, partly in section, shewing the application of my
invention to pipe and hose couplings.
a is a cylindrical tube, to which one part of the hose is attached in the usual manner,
a is the partner tube to which the other portion of the hose is attached. e is the cap,
which turns freely on the cylinder a, fis one of the lugs, is an elastic washer which
forms the watertight joint when the lip of the coupling presses it against the flange
k. are trunnions for affording leverage in coupling up and uncoupling. c is one of
the inclined planes, under which the lugs become wedged, when coupled.
Fig. 7 shews the application of my invention to union links for joining chains, m is
the union link, and e is the cap which is attached thereto in a similar manner to those
before mentioned.
It will be obvious, that, by suitable modifications of the examples shewn in the
drawings, my invention may be applied to another analogous purposes.
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 method of securing chains to, and the manufacture and use of, pole crabs
having fastenings applied thereto for such purpose, substantially as herein before
described and shewn in Fig. 1, 2, 3 and 4 of the drawings.
2. The method of uniting pipe, hose and other couplings and the manufacture and
use of the same, substantially as hereinbefore described and shewn in Figs. 5 and 6 of
the drawings.
3. The manufacture and use of union links for uniting chains and other articles,
substantially as hereinbefore described and shewn in Fig. 7 of the drawings.
4. The general construction, combination, adaptation, arrangement and application
of the several and respective parts constituting my improvements in fastenings for
securing chains, ropes, and other articles, to hooks and analogous appliances, sub-
stantially as hereinbefore described and shewn on the drawings.
Dated 16th February 1887.