IMPROVEMENTS IN CRANES
Year: 1875

page_text: LETTERS PATENT to Robert Baillie, of London Yard, Isle of Dogs,
in the County of Middlesex, for the Invention of "IMPROVEMENTS IN
CRANES."
し
Sealed the 3rd May 1876, and dated the 17th December 1875.
PROVISIONAL SPECIFICATION left by the said Robert Baillie at the
Office of the Commissioners of Patents, with his Petition, on the
17th December 1875.
I, ROBERT BALLLIE, of London Yard, Isle of Dogs, in the County
of Middlesex, do hereby declare the nature of the said Invention for
"IMPROVEMENTS IN CRANES," to be as follows:-
I employ
This Invention has for its object improvements in cranes.
a central column, which supports at one end a pair of parallel hori
zontal beams and at the other end the beams are sustained by legs,
which are able to travel around a circular rail track. On the beams a
crab is carried, and a boiler and donkey engines are mounted in con-
nection with the travelling legs. One engine is for winding, another
for traversing the crab along the beams, and a third for causing the legs

page_text: to travel around the circular rail track. If preferred the engines may
be mounted in connection with the central column, or in place of
employing direct steam power hydraulic or other gear may be applied.
The central column may be employed to support a roof, and it may
carry more than one pair of radial beams.
In some cases the central column may be arranged to rotate, in
which case a pair of radial beams is fixed to it. Or in place of a central
column the radial beams may be suspended at the centre from other
beams above.
The travelling legs may in some cases be dispensed with, the outer
ends of the radial beams being directly supported by a circular rail
track carried upon a ring wall or otherwise. Or the circular track may
be formed in connection with the radial beams, and the whole be carried
by piers at intervals.
SPECIFICATION in pursuance of the conditions of the Letters Patent,
filed by the said Robert Baillie in the Great Seal Patent Office on
the 16th June 1876.
TO ALL TO WHOM THESE PRESENTS SHALL COME, I, ROBERT
BAILLIE, of London Yard, Isle of Dogs, in the County of Middlesex,
send greeting.
WHEREAS Her most Excellent Majesty Queen Victoria, by Her
Letters Patent, bearing date the Seventeenth day of December, in the
year of our Lord One thousand eight hundred and seventy-five, in the
thirty-ninth year of Her reign, did, for Herself, Her heirs and suc-
cessors, give and grant unto me, the said Robert Baillie, Her special
license, that I, the said Robert Baillie, my executors, administrators,
and assigns, or such others as I, the said Robert Baillie, my executors,
administrators, and assigns, should at any time agree with, and no
others, from time to time and at all times thereafter during the term
therein expressed, should and lawfully might make, use, exercise, and
vend, within the United Kingdom of Great Britain and Ireland, the
Channel Islands, and Isle of Man, an Invention for "IMPROVEMENTS IN

page_text: CRANES," upon the condition (amongst others) that I, the said Robert
Baillie, my executors or administrators, by an instrument in writing
under my, or their, or one of their hands and seals, should particularly
describe and ascertain the nature of the said Invention, and in what
manner the same was to be performed, and cause the same to be
filed in the Great Seal Patent Office within six calendar months next
and immediately after the date of the said Letters Patent.
NOW KNOW YE, that I, the said Robert Baillie, do hereby declare
the nature of the said Invention, and in what manner the same is
to be performed, to be particularly described and ascertained in and by
the following statement thereof, that is to say :-
This Invention has for its object improvements in cranes. I employ
a central column, which supports at one end a. pair of parallel hori-
zontal beams and at the other end the beams are sustained by legs
which are able to travel around a circular rail track. On the beams a
crab is carried, and a boiler and donkey engines are mounted in con-
nection with the travelling legs. One engine is for winding, another
for traversing the crab along the beams, and a third for causing the legs
to travel around the circular rail track. If preferred the engines may
be mounted in connection with the central column, or in place of
employing direct steam power hydraulic or other gear may be applied.
'
The central column may be employed to support a roof, and it may
carry more than one pair of radial beams.
In some cases the central column may be arranged to rotate, in which
case a pair of radial beams is fixed to it. Or in place of a central
column the radial beams may be suspended at the centre from other
beams above.
The travelling legs may in some cases be dispensed with, the outer
ends of the radial beams being directly supported by a circular rail
track carried upon a ring wall or otherwise. Or the circular track may
be formed in connection with the radial beams, and the whole be carried
by piers at intervals.
In order that my said Invention may be most fully understood, and
readily carried into effect, I will proceed to describe the Drawings
hereunto annexed

page_text: DESCRIPTION OF THE DRAWINGS.
Figure 1 is a side elevation, and Figure 2 is an end elevation, of a
crane constructed according to my Invention and in the manner which
I prefer.
a, a, is a hollow wrought-iron column fixed on a firm foundation, on
the top of the column is a table sustaining the inner ends of the two
parallel beams b, b. These beams are able to move radially around the
hollow pivot a¹ forming part of the column a and rising through the
centre of the table. There are wheels a² fixed to the beams and running
on a ring fixed on the surface of the table to lessen friction when the
beams are moved round the pivot; c, c, are legs fixed to and supporting
the outer ends of the beams from a circular rail track d. The legs c, c,
are on wheels c¹, c¹, which are geared, as is shown, with steam
engines e, e, supplied by a boiler f; thus the legs c can be caused to
travel around the track d; g is the crab supported upon and capable
of being traversed along the beams b; g¹, g¹, is the pulley tackle. The
chain from the pulley tackle is led around two drums g* upon the
crab, and thence to the interior of the column a, which serves as a
chain locker; h is a steam engine fixed on the legs c to drive the
winding drums g* by means of the gear shown by the Drawing; i is
another engine for traversing the crab and the load suspended from it;
the gear to effect this is also clearly shown.
Having thus described the nature of my said Invention, and the
manner of performing the same, I would have it understood that I
claim the construction of cranes with beams, along which a crab
traverses, such beams moving radially around a central column or
support, and being also sustained at their outer ends from a circular
track, substantially as described.
In witness whereof, I, the said Robert Baillie, have hereunto set
my hand and seal, this Fifteenth day of June, in the year of
our Lord One thousand eight hundred and seventy-six. .