Improvements in or connected with the Operation of Machinery used for Dredging, Excavating, or Lifting, Lowering, and Dis- charging Various Substances.
Year: 1890

page_text: Date of Application, 13th Jan., 1890
Complete Specification Left 13th Oct., 1890-Accepted, 15th Nov., 1890
PROVISIONAL SPECIFICATION.
Improvements in or connected with the Operation of Machinery
used for Dredging, Excavating, or Lifting, Lowering, and Dis-
charging Various Substances.
We, WILLIAM DENT PRIESTMAN and SAMUEL PRIESTMAN, both of Holderness
Foundry, Kingston-upon-Hull, in the County of York, Engineers, and JOHN
HOPKIN MORGAN, of 3, Princes Dock, Liverpool, in the County of Lancaster,
Engineer, do hereby declare the nature of our said invention to be as follows:-
This invention has reference more particularly to apparatus for working grapple
buckets, or skips, or scoops, for dredging or excavating or other purposes, as, for
instance, lifting and discharging grain, coal, sand, gravel and other analogous
material, and has chiefly for its object to operate machinery of the type referred
to, in a more easy manner, and with greater rapidity than has hitherto been
performed.
For simplicity of description in setting forth an example of the application of
our invention, we will describe it as applied to the above-mentioned type of
machinery, that is machinery for working grapple buckets or skips, applicable and
used for dredging, excavating, and like, or analogous purposes, and employing two
chains or ropes, one for closing the bucket or skip termed herein the hoisting chain
or rope, and one for kecking the bucket or skip, and herein termed the kecking
chain or rope.
An illustration of such an apparatus or machine is shown and
described in the Specification of Letters Patent No. 1243 of 1877 granted to
W. D. and S. Priestman.
According to the present invention, the mechanisms used in connection with the
barrel or means of hauling in the hoisting chain or rope, or paying out same, or
holding it in position, and by which its operation is controlled, is combined with
and actuated by a cylinder and piston, or their equivalent, operated by steam or
other fluid pressure, the supply of the fluid thereto being controlled by a valve.
For instance, in the apparatus shown and described in the above-cited Specification,
the means by which the above operation and controlling is effected, consists of
friction gear, comprising a large friction wheel on or connected with the winding
barrel of the machine; a smaller friction wheel driven by artificial or manual power,
and adapted to operate such larger friction wheel; and a brake, against which the
larger friction wheel is adapted to be pressed, as required. The operation of
these three parts is, that as the hoisting chain or rope is required to be hauled in,
paid out, or held, so is the larger friction wheel brought into contact with the motor
friction wheel, or moved out of contact with both the friction wheel and the brake,
or brought into contact with such brake, to permit the larger friction wheel to be
moved in the necessary manner, its axis or bearing, at one end at least, is a
moveable one. In applying the present improvements to this, or an equivalent
combination, the axis or bearing of the larger friction wheel is adapted to be shifted
or moved in the manner just described by the steam, water, or other fluid under
pressure, acting through the cylinder and piston or its equivalent; that is to say,
the mechanical device or means, such as the piston and cylinder, is connected with
the moveable bearing of the larger friction wheel, and is moved by it in the one
direction or the other, or held in an intermediate position; the supply of such fluid
to the cylinder being controlled by a valve operated by the attendant of the uachine.
Or conversely such power cylinder, or its equivalent, may be adapted to operate
the brake, or the brake and the motor friction wheel, in a similar and equivalent
manner. If the moveable bearing above referred to be of the type shown and
described in the above-cited Specification, and provided with a lever for its operation,
гр.

page_text: then, as a convenient method of working it by the cylinder and piston, the piston
rod of the cylinder may be connected to the end of such operating lever.
The valve by which the supply of fluid to the cylinder for moving the piston, or
its equivalent, is controlled, should be of such a construction and so arranged as
to control the flow of fluid to and from the cylinder, in such a manner, that the
motor friction wheel and the winding barrel friction wheel, driven thereby, may be
pressed together, or the barrel friction wheel and brake pressed together, or the
barrel friction wheel held in an intermediate position,-i.e., out of contact with
either the motor friction wheel or the brake, as desired.
The application of our invention above described sets forth merely one example,
and we therefore wish it to be understood that it is not confined to that application,
but that it may be applied to various kinds of machinery of the kind referred to, or
for the purposes specified; and also that we may employ various equivalent means or
devices to the ones specified for putting our invention into practice, the kinds and
arrangements of the mechanical contrivances used depending upon the conditions of
its application.
Dated this 9th day of January 1890
CHEESBROUGH & ROYSTON,
15, Water Street, Liverpool, Applicants' Agents.
COMPLETE SPECIFICATION.
Improvements in or connected with the Operation of Machinery
used for Dredging, Excavating, or Lifting, Lowering, and Dis-
charging Various Substances.
We, WILLIAM DENT PRIESTMAN and SAMUEL PRIESTMAN, both of Holderness
Foundry, Kingston-upon-Hull, in the County of York, Engineers, and JOHN
HOPKIN MORGAN, of 3, Princes Dock, Liverpool, in the County of Lancaster,
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 has reference more particularly to apparatus for working grapple
buckets, or skips, or scoops, for dredging or excavating or other purposes, as, for
instance, lifting and discharging grain, coal, sand, gravel and other analogous
material, and has chiefly for its object to operate machinery of the type referred
to, in a more easy mauner, and with greater rapidity than has hitherto been
performed.
For simplicity of description in setting forth an example of the application of our
invention, we will describe it as applied to the above-mentioned type of machinery,
that is, machinery for working grapple buckets or skips, applicable and used for
dredging, excavating, and like or analogous purposes, and employing two chains or
ropes, one for closing the bucket or skip, termed herein the hoisting chain or rope,
and one for kecking the bucket or skip, and herein termed kecking chain or
rope. An illustration of such an apparatus or machine is shewn and described in the
Specification of Letters Patent No. 1243 of 1877 granted to W. D. and S. Priestman.
According to the present invention, the mechanisms used in connection with the
barrel or means of hauling in the hoisting chain or rope, or paying out same, or
holding it in position, and by which its operation is controlled, is combined with and
actuated by a cylinder and piston, or their equivalent, operated by steam or other
fluid pressure, the supply of the fluid thereto being controlled by a valve. For
instance, in the apparatus shewn and described in the above-cited Specification, the
means by which the above operation and controlling is effected, consists of friction
gear, comprising a large friction wheel on or connected with the winding barrel of
the machine; a smaller friction wheel driven by artificial or manual power, and
adapted to operate such larger friction wheel; and a brake, against which the larger
friction wheel is adapted to be pressed, as required. The operation of these three

page_text: parts is, that as the hoisting chain or rope is required to be hauled in, paid out, or
held, so is the larger friction wheel brought into contact with the motor friction
wheel, or moved out of contact with both the friction wheel and the brake, or
brought into contact with such brake, to permit the larger friction wheel to be move:!
in the necessary manner, its axis or bearing, at one end at least, -is a movable one.
In applying the present improvements to this, or an equivalent combination, the axis
or bearing of the larger friction wheel is adapted to be shifted or moved in the manner
just described by the steam, water, or other fluid under pressure, acting through the
cylinder and piston or its equivalent; that is to say, the mechanical device or means,
such as the piston and cylinder, is connected with the movable bearing of the larger
friction wheel, and is moved by it in the one direction or the other, or held in an
intermediate position; the supply of such fluid to the cylinder being controlled by a
valve operated by the attendant of the machine. Or conversely such power cylinder,
or its equivalent, may be adapted to operate the brake, or the brake and the motor
friction wheel, in a similar and equivalent manner. If the moveable bearing above
referred to be of the type shewn and described in the above-cited Specification, and
provided with a lever for its operation, then, as a convenient method of working it by
the cylinder and piston, the piston rod of the cylinder may be connected to the end of
such operating lever.
The valve by which the supply of fluid to the cylinder for moving the piston, or its
equivalent, is controlled, should be of such a construction, and so arranged as to
control the flow of fluid to and from the cylinder, in such a manner, that the motor
friction wheel and the winding barrel friction wheel driven thereby, may be pressed
together, or the barrel friction wheel and brake pressed together, or the barrel
friction wheel held in an intermediate position,-i.e., out of contact with either the
motor friction wheel or the brake, as desired.
In the drawings which serve to illustrate our invention shewn one arrangement
of apparatus by which the mode of operating apparatus of the kind herein specified
may be carried out :
Figure 1 of this apparatus shews it in elevation, whilst
Figure 2 shews it in plan.
With reference to the drawings, a designates the barrel on which the hoisting and
lowering chain of a crane, winch, or like apparatus for purposes above specified, is
wound; is the friction wheel mounted thereon; c is a small motor or power friction
wheel by which motion is imparted to the larger friction wheel b, and e is a fixed
brake block. represents an eccentric mounted in a fixed bearing g;
the side frame of the machine, to which frame the bearing g is attached.
i
represents
k represents the power cylinder by which the wheel b is either thrown into contact
with the motor wheel c or the brake block e, or is held in an intermediate position
between such wheel and block; I are links connecting the piston rod m of the power
cylinder with the eccentric lever n; o is the rod by which the distribution valve of
the power cylinder k is worked; and p is a lever fulcrummed at pl connected with
said rod o hy a connecting rod 9, by which the valve rod o is operated.
c' represents the shaft driven by an engine or other power, on which the wheel c is
mounted; d is the shaft of the barrel a and is provided at the end shewn in the
drawings with an eccentric, f, which is mounted in bearings eccentrically to such
shaft d and barrel a, whilst at the other end it is mounted in any suitable known way.
The eccentric lever n is fixed to the eccentric fand its other end-in the example
shewn is provided with a handle n', which is adapted to be connected with the
lever n by a socket joint at n² as shewn. By this means, should it be desired to work
the apparatus by hand in lieu of auxiliary power, it may be done by this handle.
The fluid-which say is steam-used to actuate the cylinder k is supplied by the
pipe r, and the exhaust or used fluid is carried away by the piper. The distribution
valve worked from the rod o may be an ordinary slide valve, whilst the piston within
the cylinder k may also be of ordinary construction and adapted to work and be
controlled in the usual manner by the valve. The cylinder itself is secured to one
of the side frames i of the machine. The eccentric fis so mounted in its bearing y,

page_text: and the shaft & is so arranged in relation to the eccentric f, that when the eccentric
lever n is raised the wheel b will be lowered; and on the other hand, when it is
lowered, the wheel will be raised.
In action, by raising the long arm of the lever the distribution valve of the
cylinder will be lowered, and fluid will be admitted to the upper side of the piston
of such cylinder, the result being that this piston is lowered and the eccentric lever
and eccentric partially rotated in a downward direction. The effect of this is
that the shaft & and wheel b will be raised and brought into contact with the motor or
power friction wheel c, and according to the direction this wheel is rotated the
wheel b with the barrel a is moved. On the other hand by lowering the lever p
the reverse action of the parts will take place, and the eccentric lever n will be
pressed up by the piston of the cylinder E, and the wheel b will be taken off the
wheel c and brought into contact with the fixed brake block e, and will thus be held
in a stationary position. When it is desired to allow the wheel b to run free in
either direction, that is out of contact with either the brake block e or power
wheel c, so much movement only is caused to be given to the piston of the brake
cylinder k that the eccentric lever n and eccentric are moved to a central or neutral
position and this is easily effected by the controlling lever p.
In conclusion we wish it to be understood that our invention is not confined to
the particular construction above described, as it may be modified in different ways
to suit special applications; and equivalents of the devices specified may be used
for putting the intermedial friction wheel into contact with the motor wheel or
brake and generally operating it.
Having now particularly described and ascertained the nature of this inven-
tion and in what manner the same is to be performed we declare that what we
claim is
1. The herein-described improvement connected with the operation of machinery
used for dredging, excavating, or lifting, lowering and discharging substances, con-
sisting of the use in combination with a winding barrel and friction wheel, of
mechanism substantially as specified, by which the said wheel is thrown into contact
with a motor or power friction wheel, or a brake, or held in an intermediate position
between them for the purposes set forth.
2. The arrangement and combination of parts substantially as herein described,
by which the driven wheel of machinery of the kind herein specified, is adapted to
be operated either by mechanical means or by hand.
3. In apparatus of the kind specified with reference to the drawings, the cylinder k
mounted on one of the side frames thereof, and connected by a connecting rod to and
working the lever n by which the driven wheel b is operated and controlled, such
cylinder valve being controlled by a lever such as p; as set forth with reference to
the figures of the drawings.
4. The particular arrangement and construction of parts set forth with reference to
the drawings.
Dated this 11th day of October 1890
CHEESBROUGH & ROYSTON,
15, Water Street, Liverpool, Applicants' Patent Agents.