being Raised Bodily.
Year: 1885

page_text: being Raised Bodily.
"
We WILLIAM COOPER, Neptune Foundry, Engineer, and JOHN HOLDSWORTH
27 John Street, Traveller both of Hull in the County of York do hereby declare
the nature of our invention for IMPROVEMENTS IN THE METHOD OF LOWERING
OR DROPPING A DREDGER, BUCKET, GRAB, OR ANY SIMILAR APPARATUS WITHOUT
CLOSING OF OPENING THE SAME TO RELINQUISH A FALSE GRIP-AND OF OVERHAULING
A SUFFICIENT QUANTITY OF ROPE, OR CHAIN TO ALLOW OF THE APPARATUS BEING
CLOSED UPON ITS LOAD, BEFORE BEING RAISED BODILY to be as follows:-
"
To lower, or drop a Dredger, Bucket, Grab, or any similar. apparatus whilst
open; We provide in the head of a crane, derrick, block, or other means of lifting,
two, or more sheaves, having a suitable trail for rope, or chain, with clutches, so that
when the Dredger, Bucket, Grab, or other apparatus is suspended open after having
been discharged, the sheaves may be connected, or clutched together, and so keep
the machine open during its descent; when, at any time, the sheaves can be
detached, to allow the machine to close.
To open the apparatus in the event of its having gripped any fixed object when
under water, or in any other place; we pay out a certain amount of chain from
the crane, or winch barrel, clutch the sheaves together, and then haul up, which
causes the machine to open and relinquish its grip.
To overhaul a sufficient quantity of rope, or, chain, to allow the apparatus to
grip, or dig into the material to be lifted; we pass that part of the rope, or chain
which is in connection with the crane, or winch barrel, through a block attached
to the part of rope, or chain which is connected to a cross piece, chains, or other
opening agent, so that; when the part in direct connection with the crane, or winch
barrel is hauled upon, it draws down, by means of a suitable block; the opening
arrangements, and leaves the machine free to grip without being raised bodily.
Dated this Seventeenth day of Inne 1885

page_text: being Raised Bodily.
We, WILLIAM COOPER, Neptune Foundry, Engineer, and JOHN HOLDSWORTH,
27 John St, Traveller, both of Hull, in the County of York, do hereby declare
the nature of our invention for IMPROVEMENTS IN LOWERING A DREDGER &C.-
IN THE METHOD OF OPENING THE SAME, IN CASE OF A FALSE GRIP-AND OF
OVERHAULING THE OPERATING CHAIN, as per above title and in what manner the
same is to be performed, to be particularly described and ascertained in and by
the following statement:-
To lower, or drop, a Dredger, Bucket, Grab, or any similar Apparatus whilst
open; We employ in the head of a crane, or derrick, or in a block, or other means
of lifting, two, or more sheaves, having a suitable trail for rope, or chain; with
clutches (see Fig. 2. A. A.) so that, when the Dredger, Bucket, Grab, or other
Apparatus is suspended open, after having been discharged (which is effected by
the brake B) the sheaves may be connected, or clutched together by the fork D,
Fig. 2, being acted upon by a rope, or chain passing over the sheave C. and leading
to a lever on the crane platform, or other convenient spot; or by any equivalent
arrangement; and so keep the machine open during descent.
The sheaves may be detached at any time during descent by releasing the lever,
and stopping the crane, or winch barrel; or, on the machine touching the ground,
or the material to be lifted, they will be immediately liberated by the spring E.
(or by hand power if desired) and the machine will be ready for another grip.
We may provide the lever with a weight to keep the sheaves in gear; to be placed
in rest when desired to free them.
We
This clutch arrangement for lowering, or dropping a machine when open, is also
applicable to two seperate parts of chain, used for closing, and opening.
To open an apparatus, in the event of its having gripped any fixed object under
water, or elsewhere; we pay out a certain amount of chain from the crane, or
winch barrel; clutch the sheaves together, then hoist up, which causes the machine
to open, and relinquish its grip.
To overhaul a sufficient quantity of chain, to allow the opening chains G. G. in
Fig. 1. to hang slack, or the cross piece G. G. in Fig. 3. to lower freely when the
machine is digging into its work; we pass that part of the lifting chain which is
in direct connection with the crane, or winch barrel, under the pulley or block H.
over the pulley or block F. under the pulley or block H¹ over the sheave which
is provided with the brake, in the crane head, or other means of lifting, then make
it fast to the pulley or block F.

page_text: The arrows shew the motions of the different parts of chain when the machine
is being closed, as per Fig. 1. and is being raised, as per Fig. 3.
The effect of this arrangement is, that, on the crane, or winch barrel being set
in motion, to hoist up, it pulls down the block F. before it has any power to close
the machine, thus giving the requisite slack to the chains G. G. Fig. 1. and freedom
to the cross piece G. G. in Fig. 3. to descend, to allow the machine to dig into
its work.
The double sheaved block on the bar I Fig. 3. and the single sheaved block on
the cross piece G. G. in Fig. 3. refer to a means of closing, instead of a barrel, which
we have previously patented in 1884.-We simply use one of the sheaves for the
overhauling operation, as shewn in H. Fig. Other modifications in the gear for
applying, and releasing the clutch; in the method of opening to relinquish a false
grip; and of overhauling the requisite amount of chain, may be adopted without
departing from the nature of our invention and we do not limit ourselves to the
precise details shown by the drawings.
Having now particularly described, and ascertained the nature of our said
invention, and in what manner the same is to be performed, we declare that what
we claim is:
1. A clutch, or friction arrangement by which the sheaves in a crane head, block,
or other means of lifting, may be caused to run together, or independently of each
other, in order that the machine may be freely, closed, raised, and opened, when the
sheaves are free of each other, and held open either partially, or fully by connecting
them; thus enabling the machine to be dropped suddenly if desired to penetrate
any hard material, free of brake power to hold it open, substantially as, and for the
purpose described,
2. The method of opening a machine under water or elsewhere, substantially as
described.
3. The method of overhauling a sufficient quantity of chain to allow the machine
to dig freely into its work as substantially described. The various forms, or
modifications of gear substantially as described, and illustrated.
Dated this Sixteenth day of March 1886.
WILLIAM COOPER.
JOHN HOLDSWORTH.