IMPROVE- MENTS IN SHIPS, AND IN PROPELLING THE SAME
Year: 1863

page_text: LETTERS PATENT to Richard Archibald Brooman, of 166, Fleet Street,
in the City of London, Patent Agent, for the Invention of " IMPROVE-
MENTS IN SHIPS, AND IN PROPELLING THE SAME."-A communication from
abroad by Auguste Salzmann, of Paris, France.
Sealed the 7th January 1864, and dated the 9th July 1863.
PROVISIONAL SPECIFICATION left by the said Richard Archibald Brooman
at the Office of the Commissioners of Patents, with his Petition, on
the 9th July 1863.
I, RICHARD ARCHIBALD BROOMAN, of 166, Fleet Street, in the City of
London, Patent Agent, do hereby declare the nature of the said Invention for
"IMPROVEMENTS IN SHIPS, AND IN PROPELLING THE SAME," to be as follows:-
This Invention consists in constructing the hull of an elongated narrow
form, and in connecting to the bottom thereof a cylindro-conical tube; the
communication between the two is effected by three vertical cylinders.. The
tube is divided into three water-tight compartments, the two end compart-
ments are left empty. The central compartment may at pleasure be made to
contain compressed air or water, whereby the line of floatation may be regu-
lated. To diminish the friction of the three cylinders, uniting the tubular keel
and hull, I enclose them in a casing. At the sides of the hull there are, say,
six supporting and propelling cylinders or drums divided into water-tight

page_text: compartments, which together with the tubular keel maintain the ship at one
level, and the drums keep it in equilibrium. The circumference of the drums
is not a plain surface, but consists of two inclined planes meeting in the centre,
and sloping from the centre to each side. Floats are attached by rods or bars
to and parallel with the circumference of the drums, but at a distance from it
equal to about the breadth of the floats. The object of the space between the
drums and the floats is to allow of the water running off, instead of being
carried round by the floats, as would be the case if the floats were attached
directly to the drums. Each of the drums is by preference driven by a
separate engine, in order that all or any of them may be worked as required.
SPECIFICATION in pursuance of the conditions of the Letters Patent, filed
by the said Richard Archibald Brooman in the Great Seal Patent Office
on the 9th January 1864.
TO ALL TO WHOM THESE PRESENTS SHALL COME, I, RICHARD
ARCHIBALD BROOMAN, of 166, Fleet Street, in the City. of London, Patent
Agent, send greeting.
WHEREAS Her most Excellent Majesty Queen Victoria, by Her Letters
Patent, bearing date the Ninth day of July, in the year of our Lord One
thousand eight hundred and sixty-three, in the twenty-seventh year of Her
reign, did, for Herself, Her heirs and successors, give and grant unto me, the
said Richard Archibald Brooman, Her special licence that I, the said Richard
Archibald Brooman, my executors, administrators, and assigns, or such others
as I, the said Richard Archibald Brooman, 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 SHIPS, AND IN PROPELLING THE SAME,"
(communicated to me from abroad by Auguste Salzmann, of Paris, France,
upon the condition (amongst others) that I, the said Richard Archibald
Brooman, 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.

page_text: NOW KNOW YE, that I, the said Richard Archibald Brooman, 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, reference being had to the Drawings hereunto
annexed, that is to say:-.
This' Invention consists. in constructing the hull of an elongated narrow
form, and in connecting to the bottom thereof a cylindro-conical tube; the
communication between the two is effected by three vertical cylinders. The
tube is divided into three water-tight compartments; the two end compart-
ments are left empty. The central compartment may at pleasure be made to
contain-compressed air or water, whereby the line of floatation may be regulated.
To diminish the friction of the three cylinders uniting the tubular keel and
hull, Lenclose them in a casing. At the sides of the hull there are, say, six
supporting and propelling cylinders or drums divided into water-tight compart-
ment, which, together with the tubular keel, maintain the ship at one level,
and the drums keep it in equilibrium. The circumference of the drums is not
a plain surface, but consists of two inclined planes meeting in the centre,, and
sloping from the centre to each side. Floats are attached by rods or bars to
and parallel with the circumference of the drums, but at a distance from it
equal to about the breadth of the floats; the object of the space between the
drums and the floats is to allow of the water running off instead of "being"
carried round by the floats, as would be the case if the floats were attached
directly to the drums. Each of the drums is, by preference, driven by a
separate engine, in order that all or any of them may be worked as required.
Figure 1 of the accompanying Drawings is a side elevation of a ship
constructed according to this Invention with six supporting and propelling
cylinders or drums; Figure 2 is a transverse section through the line C, D, of
Figure 3, which is a plan of the ship; Figure 4 is a horizontal section below
the water-line. d, e, f, is a cylindro-conical tube connected to the bottom of
the hull, and communicating therewith by three vertical cylinders a, b, c. The
tube d, e, f, is divided into three water-tight compartments, as represented in
Figure 1; the two end compartments are, as before stated, left empty, and the
central compartment may at pleasure be made to contain compressed air or
water, whereby the line of floatation may be regulated. 9, 9, 9, are supporting
and propelling cylinders or drums divided into water-tight compartments;
their circumference consists of two inclined planes, as shewn in Figure 2.
h, h, h, are floats attached by rods or bars to and parallel with the circum-
ference of the drums g, but at a distance from it equal to about the breadth of
the floats, as before mentioned.

page_text: And having now described the nature of the said Invention, and in what
manner the same is to be performed, I declare that I claim as the "Improve-
ments in Ships, and in Propelling the same,
First, constructing the hull of an elongated narrow form, and connecting to
the bottom thereof a cylindro-conical tube, the communication between the {
two being effected by three vertical cylinders, all substantially as herein-before
described and illustrated in the accompanying Drawings.
Second, supporting and propelling ships by cylinders or drums divided into
water-tight compartments, the circumference of such cylinders or drums
consisting of two inclined planes, and having floats attached thereto, all
substantially as herein-before described and illustrated in the accompanying
Drawings.
In witness whereof, I, the said Richard Archibald Brooman, have
hereunto set my hand and seal, this Eighth day of January, One
thousand eight hundred and sixty-four.
R A BROOMAN