IMPROVEMENTS IN HYDRAULIC CRANES
Year: 1885

page_text: I, ANDREW BETTS BROWN, of Rosebank Iron Works, Edinburgh, in the County
of Mid Lothian, North Britain, Engineer, do hereby declare the nature of my
said invention for "IMPROVEMENTS IN HYDRAULIC CRANES," to be as follows, that
is to say :-
'
My said Invention relates to hydraulic cranes of a kind having an hydraulic
cylinder carried by or forming part of the jib and it consists principally in
constructing the cylinder and combining it with the other parts in an improved
manner.
In carrying out my Invention I construct the jib with a pair of iron or steel
girders of. I-section; and the hydraulic cylinder is placed between these girders
and near the lower end of the jib. The body of the hydraulic cylinder consists of
an iron or steel tube the ends of which are held in castings bolted to the girders
of the jib. The upper casting is made with a stuffing box through which the ram
works, and the upper end of the cylinder tube fits into a socket formed for it in
the casting. The lower end of the cylinder tube passes through the lower casting
and fits into a socket formed for it in a head or end piece which on its outer side
carries the lower tackle pulleys and to which is connected the pipe through which
the water or other liquid enters and leaves the cylinder. The head or end piece
is bolted to the lower of the two castings which are fixed to the jib girders; and
when the bolts are screwed up the cylinder tube is compressed longitudinally
between the head or end piece at the lower end and the casting at the upper end,
the joints in the sockets at the ends of the tube being rendered tight by rings of
rubber or other suitable compressible material. The ends of the cylinder tube may
be screwed into the end castings instead of being held as hereinbefore described.
The tackle pulleys for the hoisting chain or wire rope, the connection of the jib
with the stationary parts of the crane, and the pipe connections are all by
preference arranged as described in the Provisional Specification relative to my
application for Letters Patent, N° 16939 of 1884.

page_text: I, ANDREW BETTS BROWN, of Rosebank Iron Works, Edinburgh, in the County
of Mid Lothian, North Britain, 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, that is to say :-
My said Invention relates to hydraulic cranes of a kind having an hydraulic
cylinder carried by or forming part of the jib, and it consists principally in
constructing the cylinder and combining it with the other parts in an improved
manner,
The ram of the hydraulic cylinder passes through a stuffing box at the higher
end of the cylinder, and carries a set of tackle pulleys which act in concert with
a set of tackle pulleys at the lower end of the cylinder to draw in or let out the
hoisting chain or wire rope in a well understood manner. In carrying out my
present Invention I prefer to arrange these tackle pulleys, also the connection of
the jib with the stationary parts of the crane, and also the pipe connections all
as described in the Specification of my earlier patent N° 16939 of 1884; at the
same time my present improvements are also applicable with other arrangements
of the parts referred to.
Parts of a crane as made with my present improvements are shown on two
accompanying sheets of explanatory drawings, figure, 1, on sheet, 1, being a side
elevation whilst figure, 2, is a view as looking squarely down on the upper side of
the jib. Figure, 3, is an enlarged longitudinal section of the jib cylinder, figure, 4,
is an end view of the lower cover or end of the cylinder, figure, 5, is a transverse
section showing the lower end of the cylinder with its cover removed, and figure, 6,
is a transverse section showing the upper end of the cylinder. In these drawings
the same reference numerals are used to mark the same or like parts wherever
they are repeated,
The
In my improved apparatus the jib of the crane is constructed with a pair of iron
or steel girders, 7, of I-section, and the hydraulic cylinder, 8, is placed between
these girders, 7, and near the lower end of the jib. The body of the hydraulic
cylinder, 8, consists of an iron or steel tube the ends of which are held in
castings, 9, 10, bolted to the girders, 7, of the jib. The upper casting, 9, is made
with a stuffing box, 11, through which the ram, 12, works; and the upper end of
the cylinder tube, 8, fits into a socket, 13, formed for it in the casting, 9.
lower end of the cylinder tube, 8, passes through the casting, 10, and fits into a
socket, 14, formed for it in the head or end piece, 15, which on its outer side carries
the lower tackle pulleys, 16, and to which is connected the pipe, 17, through which
the water or other liquid enters and leaves the cylinder. The head or end piece, 15,
is bolted to the lower, 10, of the two castings which are fixed to the jib girders, 7;
and when the bolts are screwed up the cylinder tube, 8, is compressed longi-
tudinally between the head or end piece, 15, at the lower end, and the casting, 9,
at the upper end, the joints in the sockets at the ends of the tube, 8, being, if
necessary rendered tight by rings of rubber or other suitable compressible material,

page_text: The ends of the cylinder tube, 8, may be screwed into the end castings, 9, 10,
instead of being held as herein before described, but I prefer the method so
described.
The parts of the crane which are shown in the drawings besides those herein-
before referred to, are represented as constructed or arranged as in my earlier
patent specification hereinbefore referred to.
Having now particularly described and ascertained the nature of my said
Invention and in what manner the same is to be performed I declare that what
I claim is:-
The improved construction of combined jib and cylinder of an hydraulic crane,
the said cylinder consisting of a tube having its ends held in castings bolted
between two girders forming the jib substantially as hereinbefore described.
EDMUND HUNT,
Applicant's Agent.