Improvements in Dredging Cranes and like Appliances.
Year: 1892

page_text: Date of Application, 13th July, 1892
Complete Specification Left, 13th Apr., 1893-Accepted, 17th June, 1893
PROVISIONAL SPECIFICATION.
Improvements in Dredging Cranes and like Appliances.
I, EVAN DAVIES, of Twynfilkins, Pontllanfraith, Newport, in the County of
Monmouth, Fitter, do hereby declare the nature of this invention to be as
follows:-
This invention relates to the manner in which I construct and arrange cranes
and other machines used for dredging purposes or for raising water or loose material
which is required to be discharged from the crane bucket or scoop at any desired
position after having been raised.
In carrying my invention into effect when constructing a crane to be used for
dredging purposes when the bucket is to be in the form of a scoop or large tub
like vessel, I employ any well known form of hoisting machinery, crane jib, and
swivelling frame, as commonly used upon. cranes for such purposes, and I work the
hoisting machinery by hand, steam, hydraulic, electrical or other mechanical power
in any well known manner. The lifting chain, cable or rope I connect to the
crane barrel or winding pulley at the one end upon the crane, while the other outer
end I attach to a crosshead or crossbar having two arms or links connected to it.
These two arms or links I carry from the crossbar to the bucket or hopper; the
connection being made either by means of pins or pivots passing from the upper
sides of the bucket, or by projecting plates and pins separately attached to the
bucket in any usual manner, capable of permitting the arms or links to turn or
move freely upon the joints thus made. The crossbar with its connected links or
arins I thus cause to be carried upon the bucket in such a manner that the bucket
can be moved freely and be made to pass under the crosshead when turned upside
down if so desired.
Upon the lower ends or near the bottom of the bucket I secure in any ordinary
manner on opposite sides, a chain, cable or rod upon which the crosshead, or link.
crossbar slides. The outer ends of the guide chains or guide rods I connect together
by means of a tie bar or guy plate, and in the centre of this bar or plate I place
a link or hook for connecting to an operating chain.
I attach a link ring or hook to the centre of the link crosshead for the main or
bucket lifting purposes and I carry the chain or rope over guide pulleys within the
crane jib or upon the post or within the frame, to the lifting barrel; the motion of
this barrel being obtained in any well known manner. Similarly I attach a second
chain or rope to the guide tie bar or guy plate, and I carry this rope or chain to a
second barrel or to a separate motion pulley or falling block carried within or upon
the crane frame. This second chain or rope 1 employ for permitting the bucket
to be tilted or overturned at any desired position in order that its contents may be
discharged into any receptacle or on to any bank.
al
When arranging my improved discharging or releasing chain or rope to work
in connection with a separate or independent falling block carried within the frame
of the crane, I arrange the upper portion on a separate part of the frame as a
slide upon or between which a weighted block may freely move up and down,
the end of the releasing chain being connected to this sliding block. Upon this
frame or slide I mount a catch or trip bracket having projecting arm or lever
against which the sliding bracket may strike when ascending and be held thereby,
but may strike when descending and pass the obstructing pivoted lever or arm.
Thus when the motion of the sliding block is arrested the continued lowering out
of the main or bucket chain causes the guy cross bar with its guide rods to remain
stationary while the main crossbar slides down over the guide rods and thus tilts
or overturns the bucket on account of the bottom end of the bucket being, held

page_text: .
stationary by the guide rods or guide ropes attached to the releasing chain by
their tie bar.
The action of my bucket in releasing depends upon the secure fixing or holding
of the bottom of the bucket or hopper while the top portion is allowed at the same
time to move down.
I arrange the position of my releasing stop such that it may be adjusted to tilt
the bucket at any desired position and to release it by means of a hand cord or
hand lever when such is desired.
I lift both of the chains together when raising the bucket preferably by causing
the main crossbar to engage with, and lift the guide rod tie bar.
In order to reduce the friction and wear and tear upon the ropes or chains
attached to the bottom of the bucket and the crossbar, I sometimes arrange pulleys
within or upon the crossbar or guy plate for the ropes or chains to work upon.
And to further secure the safe working of the hooks attached to the crossbar I
prefer to employ a spring catch or an adjustable screw plate to close the open ends
of the hooks when desired.
I do not limit the application of my present invention to any particular form of
crane or winding or releasing gear. And I employ the same essential features of
my invention herein set forth when arranging separate winding drums or barrels
for the two chains or ends, in which case I cause the releasing barrel to be held
stationary at any desired position while the main bucket chain barrel continues in
motion until the hopper or bucket is overturned.
Dated this 12th day of July 1892.
CLERK & MARKS,
13, Temple Street, Birmingham, Agents for the Applicant.
COMPLETE SPECIFICATION.
Improvements in Dredging Cranes and like Appliances.
I, EVAN DAVIES, of Twynfilkins, Pontllanfraith Newport, in the County of
Monmouth, Fitter, 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 the manner in which I construct and arrange cranes and
other machines used for dredging purposes or for raising water or loose material
which is required to be discharged from the crane bucket or scoop at any desired
position after having been raised.
'
In carrying my invention into effect when constructing a crane to be used for
dredging purposes when the bucket is to be in the form of a scoop or large tub
like vessel, I employ any well known form of hoisting machinery, crane jib, and
swivelling frame as commonly used upon cranes for such purposes, and I work the
hoisting machinery by hand, steam, hydraulic, electrical or other mechanical power
in any well known manner.
In the accompanying sheet of explanatory drawings,
Figure 1 is a front elevation of an ordinary crane having my improved bucket
and appliances attached.
Figure 2 is a detail elevation of the bucket when discharging its contents or
when being brought into position for dredging.
Figure 3 is a detailed front elevation and Figure 4 an end elevation of my
improved bucket with its connections for tilting.
Figure 5 and Figure 6 are front and end elevations respectively of a modification
I sometimes adopt for discharging the bucket.
The lifting chain, cable or rope A, I connect to the crane barrel or winding.
pulley B, at the one end upon the crane while the other outer end, I attach to a
crosshead or crossbar C, having a loop D or two arms or links D' connected to it.

page_text: These two arms or links or the loop I carry from the crossbar to the bucket or
hopper E; the connection being made either by means of pins or pivots F passing
from the upper sides of the bucket, or by projecting plates and pins separately
attached to the bucket in any usual manner, capable of permitting the arms or
links to turn or move freely upon the joints thus made. The crossbar with its
connected loop, links or arms I thus cause to be carried upon the bucket in such a
manner that the bucket can be moved freely and made to pass under the crosshead C,
when turned upside down if so desired as shown in Figure 2.
.
Upon the lower ends or near the bottom of the bucket I secure in any ordinary
manner on opposite sides, pivots or plates for carrying a loop or links having a
chain G cable or rod upon which the crosshead or link crossbar slides. The outer
ends of the guide chains H or guide rods H', I connect together, or I arrange a tie
bar or guy plate K, in the centre of which I place a link or hook for connecting to
an operating chain G.
I attach a link ring or hook to the centre of the link crosshead for the main
bucket lifting purposes and I carry the chain or rope A over a guide pulley within
the crane jib L or upon the post or within the frame, to the lifting barrel B; the
motion of this barrel being obtained in any well known manner. Similarly I attach
a second chain or rope G, loop H' or to the guide tie bar or guy plate K, and I
carry this rope or chain to a second barrel or to a separate motion pulley or falling
block M, carried within or upon the crane frame or jib L. This second chain or
rope G, I employ for permitting the bucket E to be tilted or overturned at any
desired position in order that its contents may be discharged into any receptacle or
on to any bank.
When arranging my improved discharging or releasing chain or rope to work in
connection with a separate or independent falling block M carried within the frame
or jib of the crane, I arrange the upper portion on a separate part of the frame as
a slide N
upon or between which a weighted block may freely move up and
down, the end of the releasing chain being connected to this sliding block M.
Upon this frame or slide I mount a catch or trip bracket having a projecting arm
or lever O against which the sliding block may strike when ascending and be held
thereby, but may strike when descending and pass the obstructing pivoted lever or
Thus when the motion of the sliding block M, is arrested the continued
lowering out of the main or bucket chain A, causes the guy crossbar K with its
loop H, or chains H, to remain stationary while the main crossbar C slides down
over the guide chains H or rods and thus tilts or overturns the bucket on account
of the bottom end of the bucket being held stationary by the guide rods or guide
ropes or chains H attached to the releasing chain G by their tie bar.
arm.
When employing a loop H¹ I prefer to mount a guide pulley H2 upon the
crosshead G.
The action of my bucket in releasing depends upon the secure fixing or holding
of the bottom of the bucket or hopper while the top portion is allowed at the same
time to move down.
I arrange the position of my releasing stop O such that it may be adjusted to
tilt the bucket at any desired position and to release it by means of a hand cord P
or hand lever when such is desired.
I lift both of the chains together when raising the bucket preferably by causing
the main crossbar to engage with and lift the guide rod tie bar.
In order to reduce the friction and wear and tear upon the ropes or chains
attached to the bottom of the bucket and the crossbar, I sometimes arrange pulleys
within or upon the crossbar or guy plates for the ropes or chains to work upon.
And to further secure the safe working of the books attached to the crossbar I
prefer to employ a spring catch or an adjustable screw plate to close the open ends
of the hooks when desired.
I do not limit the application of my present invention to any particular form of
crane or winding or releasing gear and I employ the same essential features of my
invention herein set forth when arranging separate winding drums or barrels for the

page_text: two chains or ends, in which case I cause the releasing barrel to be held stationary
at any desired position while the main bucket chain barrel continues in motion until
the hopper or bucket is overturned.
Having now particularly described and ascertained the nature of my said inven-
tion, and in what manner the same is to be performed, I declare that what I
claim is :-
:-
1. The combination and arrangement of crane bucket or crane hopper tilting
appliances for use upon cranes and for like purposes, substantially as and for the
purposes hereinbefore described and as illustrated in the accompanying drawings.
2. The construction of appliances for releasing a crane or dredging bucket or
hopper in which a falling weight is employed with a supplementary chain for
holding the bottom end of the bucket stationary while the upper portion is lowered
thereby causing it to tilt, substantially as herein before described and as illustrated
in the accompanying drawings.
Dated this 12th day of April 1893.
CLERK & MARKS,
13, Temple Street, Birmingham, Agents for the Applicant.