Improvements in Apparatus for Raising, Lowering, and Discharging Grabs, Buckets, and like Appliances.
Year: 1888

page_text: Date of Application, 2nd Nov., 1888
Complete Specification Left, 2nd Aug., 1889-Accepted, 21st Sept., 1889
PROVISIONAL SPECIFICATION.
Improvements in Apparatus for Raising, Lowering, and Discharging
Grabs, Buckets, and like Appliances.
I JOHN HOPKIN MORGAN of 3 Princes Dock Liverpool in the County of Lancaster
Engineer do hereby declare the nature of this invention to be as follows:-
The object is to provide simple, durable, and efficient apparatus for economically
and readily raising and lowering grabs buckets, wagons and like receptacles and for
opening, and closing or tipping and tilting the said receptacles.
Apparatus under the first part of my invention has a winding barrel hydraulic ram
or equivalent device fitted with two chains one of which passes over a pulley carried in
movable bearings, or each chain may pass over a pulley having movable bearings.
Lever or other mechanism is provided for giving motion to the pulley bearings. By
varying the position of the pulleys the chains passing over them are so acted on that a
grab may be opened or closed or a bucket or wagon tipped as required.
Under the second part for shortlifts I employ one chain on the winding barrel
hydraulic ram or equivalent device such chain being connected to two chains passing
over pulleys on the jib as above setforth.
Under the third part I provide a fixed or adjustable brake or stop for arresting the
motion of one of the chains when it is desired to open and close the grab or tip the
bucket or wagon.
Under the fourth part when material is being lifted from beneath water I make
the winding barrel of two diameters or so connect the hydraulic ram or motor to a
compensating barrel or its equivalent that the weight on the motor is practically
uniform whether the grab, bucket, or receptacle is in or out of the water.
Under the fifth part I make a brake for raising and lowering apparatus under my
invention by running melted soft or plastic metal between a hard metal concave with
the brake wheel of the said hoisting apparatus.
Under the sixth part I carry the winding barrel in inovable bearings and employ
differential gear having increasing power at each end of the stroke for giving motion
to the said bearings so as to move a friction wheel on the said barrel into contact
with a brake or driving wheel.
Dated this First day of November 1888
Per pro J. T. KING,
J. Johnson, Agent.
COMPLETE SPECIFICATION.
Improvements in Apparatus for Raising, Lowering, and Discharging
Grabs, Buckets, and like Appliances.
1 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 follow
ing statement:-
The object is to provide simple durable and efficient apparatus for economically and
readily raising and lowering grabs, buckets, wagons and like receptacles and for
opening and closing or tipping and tilting the said receptacles.
Apparatus under the first part of my invention has a winding barrel hydraulic ram
or equivalent device fitted with two chains one of which passes over a pulley carried
in movable bearings, or each chain may pass over a pulley having movable bearings.
Lever or other mechanism is provided for giving motion to the pulley bearings. By

page_text: varying the position of the pulleys the chains passing over them are so acted on that
a grab may be opened or closed or a bucket or wagon tipped as required.
Under the second part for short lifts 1 employ one chain on the winding barrel
hydraulic ram or equivalent device such chain being breeched or connected to two
chains passing over pulleys on the jib as above set forth.
Under the third part I provide a fixed or adjustable brake or stop for arresting the
motion of one of the chains when it is desired to open and close the grab or tip the
bucket or wagon.
Under the fourth part when material is being lifted from beneath water I make the
winding barrel of two diameters or so connect the hydraulic ram or motor to a com-
pensating barrel or its equivalent that the weight on the motor is practically uniform
whether the grab bucket or receptacle is in or out of the water.
Under the fifth part 1 make a brake for raising and lowering apparatus under my
invention by running melted soft or plastic metal between a hard metal concave and
the brake wheel of the said hoisting apparatus.
Under the sixth part I carry the winding barrel in movable bearings and employ
differential gear having increasing power at each end of the stroke for giving motion
to the said bearings so as to move a friction wheel on the said barrel into contact with
a brake or driving wheel.
DESCRIPTION OF THE DRAWINGS.
In all the views the same letters denote equivalent parts.
Fig. 1 is an elevation of apparatus illustrating the first part of my invention. a is
a steam crane of any usual construction. jib carrying the pulley cover which
the raising and lowering chain passes in fixed bearings. d pulley over which the
opening and closing chain passes. The pulley d is carried in bearings on the bell
crank lever e pivotted to tho jib bat f. the rod g receiving motion from the cylinder
and piston his coupled to the said bell crank lever so that when fluid is admitted
to the said cylinder the bell crank lever may be caused to move and with it the
pulley d. Means of adjustment may be provided between the rod y and the bell
crank lever so that the movement of the pulley d in proportion to the stroke of
the piston may be varied. winch. j raising and lowering chain. k opening and
closing chain. grab. It will be obvious that the grab can be opened and closed
by raising and lowering the pulley d by the agency of the cylinder and piston h.
Fig. 2 is an elevation of a modification of apparatus under the first part of my
invention here the pulley d is coupled direct to the piston rod instead of being
connected thereto by means of a fever, this construction has the disadvantage of
not providing for adjustment.
Fig. 3 is an elevation of a further modification under the first part of my inven-
tion here both the pulleys c and d are movable. The said pulleys are carried on
arms m pivotted at n to links o the said links o are jointed to the jib bat f.
h cylinder and piston the rod of which is coupled to the arms m. It will be obvious
that as the piston moves to and fro the pulleys c and d will approach and recede
from each other so as to cause the grab or bucket to be opened and closed.
Fig. 4 is an elevation of apparatus under the second and third parts of my
invention. This arrangement is applicable to short lifts only. The opening and
closing chain is coupled to the raising and lowering chain at p. y is a brake or
stop of any suitable construction for arresting the motion of the raising and lower-
ing chain when desired. It will be seen that if the raising and lowering chain is
prevented from moving that the grab or bucket may be opened and closed by paying
out or hauling in the opening and closing chain.
Fig. 5 is an elevation of apparatus under the fourth part of my invention for
use in raising materials out of water here the winding barrel is made of two
diameters and s seen more particularly in the view fig. 6. When the grab or bucket
is under water the chains pass round the large diameter when the grab or bucket is

page_text: above the water the chains are on the small diameter. This may easily be provided
for as the height of the pulleys c d above the water will be practically constant. The
large and small diameters of the winding barrel are so proportioned that the
power necessary to turn the barrel will be constant whether the load is in or out
of the water.
Fig. 7 is an elevation of apparatus under the fifth and sixth paris of my
invention. Under the fifth part soft metal t in a molten state is allowed to flow
between the concave u and the brake wheel so as to form an efficient friction block
accurately fitting the periphery of the wheel v. Under the sixth part one end of
the carrying shaft of the wheel v rotates in a movable bearing and motion is given
to the said bearing so as to move the wheel v to and from the block t by means of
the following novel mechanism. The said bearing is carried in an excentric to
which motion is imparted by an arm 2. The arm 2 is coupled by a link 3 to the
arm 4 which is itself pivotted to the arm 5. The arm 5 is pivotted to the fixed
bracket 6 and is adjustable as to position by the hand wheel and screw 7. 8 tee
lever pivotted to the arm 4 and to the link 9 which link 9 also pivotted to the arm 5.
10 rack for securing the lever 8 in position. As the lover 8 is moved so will the
arm 2 be caused to travel and the wheel will be brought into or out of contact with
the block t. By altering the position of the arm 5 the position of the parts may be
adjusted so as to allow for wear.
The gear 3, 4, 5, 6, 7, 8, 9 may advantageously be used for opening and closing
grabs or clips as shown in fig. 2.
It will be obvious that many modifications of apparatus may be made under my
invention.
Having now particularly described and ascertained the nature of the said inven-
tion and in what manner the same is to be performed I declare that what I
claim is.
First. In apparatus for raising lowering and discharging grabs buckets and
like appliances the combination of a fixed and movable or of two movable pulleys
with actuating gear substantially in the manner and for the purpose setforth.
Second. In apparatus for raising lowering and discharging grabs buckets and
like appliances the combination of a single winding chain with raising and lowering
and opening and closing chains substantially as setforth.
Third. In apparatus for raising lowering and opening and closing grabs buckets
and like appliances the combination of actuating chains with a brake or stop sub-
stantially in the manner and for the purpose setforth.
Fourth. In apparatus for raising lowering and discharging grabs buckets and like
appliances the combination with a winding barrel having two diameters of operating
gear substantially in the manner and for the purpose setforth.
Fifth. Constructing brakes for raising and lowering apparatus substantially as
setforth.
Sixth. Differential gear for giving motion to grabs or like appliances and the
bearings of brake wheel shafts substantially as setforth.
Dated this 1st day of August 1889.
Per pro J. T. KING,
J. Johnson, Agent.