Improvements in Cranes.
Year: 1890

page_text: Date of Application, 27th Mar., 1890
Complete Specification Left, 5th June, 1890-Accepted, 26th July, 1890
PROVISIONAL SPECIFICATION.
Improvements in Cranes.
1, ROGER WRIGHT of the Elswick Works, Newcastle on Tyne, Engineer do hereby
declare the nature of this invention to be as follows:-
This Invention relates to what are known as hydraulic ingot cranes. In such
cranes as heretofore constructed considerable transverse strains are thrown on to the
press when the load is lifted.
According to this invention the crane is provided with a central pillar which is
preferably octagonal in section. Four of the sides of the octagon carry guide rails
upon which a ferrule or sheath slides. The jib is free to turn upon this sheath rings
of live rollers or friction rollers being preferably interposed between them to diminish
friction. The weight of the sheath and the revolving jib are counterbalanced by a
hydraulic cylinder fixed against another side of the central pillar, and in constant
communication with the accumulator. On the opposite side of the central pillar is
fixed another hydraulic cylinder for lifting the load. Two hydraulic cylinders are
provided for revolving the jib, these are fixed to the inside of the sheath and work
together, the ram of one being forced outwards whilst the ram of the other is with-
drawn. A chain whose ends are fixed passes over pulleys carried by the rams of
these cylinders and is led around guide pulleys and a drum fixed to the jib. The
water to these cylinders is supplied through telescopic pipes placed against the sides
of the central pillar.
If desired, cylinders or other gear may be fitted, as is usual, to the revolving jib
for racking the load in or out, the load being hung from a carriage travelling hori-
zontally on the jib. In such a case the water for working this gear is carried through
telescopic or jointed pipes.
Doct 1
CML 1900
COMPLETE SPECIFICATION.
Improvements in Cranes.
I ROGER WRIGHT, of the Elswick Works, Newcastle-on-Tyne, 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 relates to what are known as hydraulic ingot cranes. In such
cranes as heretofore constructed considerable transverse strains are thrown on to the
press when the load is lifted.
According to this invention the crane is provided with a central pillar which is
preferably octagonal in section so that instead of the pillar being made of cast iron as
is usual it may be made of rolled wrought iron or steel plates to better withstand the
transverse strains to which it is subjected by the load. Four of the sides of the
octagon carry guide rails upon which a ferrule or sheath slidės. The jib is free to
turn upon this sheath, rings of live rollers or friction rollers being preferably inter-
posed between them to diminish friction. The weight of the sheath and the revolving
jib are counterbalanced by a hydraulic cylinder fixed against another side of the
central pillar, and in constant communication with the accumulator. On the opposite
side of the central pillar is fixed another hydraulic cylinder for lifting the load or if
it is desired to have a crane with variable lifting power the lifting cylinder may be
made with a differential ram and piston or two or more lifting cylinders may be
used. Two hydraulic cylinders are provided for revolving the jib, these are fixed

page_text: The water to these cynnders is supplied through telescopic
pipes placed against the sides of the central pillar.
If desired, cylinders or other gear may be fitted as is usual, to the revolving jib for
racking the load in or out, the load being hung from a carriage travelling horizontally
on the jib. In such a case the water for working this gear is carried through
telescopic or jointed pipes.
In order that my said invention may be more fully understood and readily carried
into effect I will proceed to describe the drawings hereunto annexed.
DESCRIPTION OF THE DRAWINGS.
Figure 1 is a side elevation and Figure 2 is a plan of a
according to my invention.
crane constructed
A is the central pillar which is preferably octagonal in section. Four sides of the
octagon carry guide rails B B B B upon which a ferrule or sheath C slides. Dis
the jib which is free to turn on the sheath C and E E E are live rollers interposed
between them.
F and G are two hydraulic cylinders fixed on opposite sides of the central pillar A,
the cylinder F with its ram is for counterbalancing the weight of the sheath and jib
and the cylinder G with its ram is for lifting the load. The former is in constant
communication with the accumulator or water supply; the other is allowed to fill and
empty by valves operated by hand; these valves may be such as are commonly used
in connection with hydraulic cranes.
H and Jare also two hydraulic cylinders fixed to the inside of the sheath for
revolving the jib D the passage of water to and from these cylinders also is controlled
by valves, the cylinders work together the ran of one being forced outwards whilst
the ram of the other is withdrawn.
A chain K whose ends are fixed to the cylinders H and J passes over pulleys L
and M carried by their rams and is led round guide pulleys M. M and a drum N
fixed to the jib. The chain is made fast to this drum.
In the drawing a hook is shown at the end of the jib to suspend the load but as
stated before there may be a carriage to travel along the jib.
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. A crane substantially as described having a central pillar; a ferrule or sheath
upon the pillar; a jib mounted upon the sheath; and hydraulic apparatus in the
interval between the pillar and the sheath.
2. A crane substantially as described having a central pillar; a ferrule or sheath
upon the pillar, a jib mounted upon the sheath and in the interval between the pillar
and the sheath an hydraulic cylinder and ram for balancing the weight of the sheath
and jib and others for lifting and slewing.
3. A crane substantially as represented by the annexed drawings.
Dated this and days of T1000
ROGER WRIGHT.