IMPROVEMENTS IN PADDLE WHEELS
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 "IMPROVEMENTS
IN PADDLE WHEELS."-A communication from abroad by Gustave Sahler,
IN PADDLE WHEELS."-A communication from abroad by Gustave Sahler,
of Montbéliard, France.
Sealed the 24th November 1863, and dated the 28th May 1863.
PROVISIONAL SPECIFICATION left by the said Richard Archibald
Brooman at the Office of the Commissioners of Patents, with his
Petition, on the 28th May 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 PADDLE WHEELS," to be as follows:-
This Invention consists in constructing paddle wheels with undulating
propelling surfaces, as hereafter explained. To a central nave or boss,
through side plates, I fix radiating arms or spokes, which I arrange in two
vertical planes, and carry a band of sheet iron or other sheet metal alternately
from the arms in one plane to those in the other plane, so as to cause it to
present an uninterrupted series of helicoidal planes. By these successive
helicoidal planes the water is alternately pressed in one direction and, in
another, so as to propel the vessel to which the wheels are fitted. These
wheels may be applied as ordinary paddle wheels at the sides of a vessel or at
any other part.

page_text: 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 28th November 1863.
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 Twenty-eighth day of May, in the year of our Lord
One thousand eight hundred and sixty-three, in the twenty-sixth year of Her
reign, did, for Herself, Her beirs 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 law-
fully 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 PADDLE WHEELS," (communicated to me from abroad
by Gustave Sahler, of Montbeliard, 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.
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 paddle wheels with undulating
propelling surfaces, as hereafter explained. To a central nave or boss, through
side plates, I fix radiating arms or spokes, which I arrange in two vertical
planes, and carry a band of sheet iron or other sheet metal alternately from the
arms in one plane to those in the other plane, so as to cause it to present an
uninterrupted series of helicoidal planes. By these successive helicoidal planes

page_text: the water is alternately pressed in one direction and in another, so as to propel
the vessel to which the wheels are fitted.
Figure 1 of the accompanying Drawings is a face view, and Figure 2 an
edge view, of a paddle wheel constructed according to this Invention.
a is a central nave or boss, carrying side plates b, c, to which are fixed
radiating arms or spokes d, f, arranged in two vertical planes; 9 is a band of
sheet iron or other sheet metal, carried alternately from one of the arms d to
one of the arms f, and from one of the arms f to one of the arms d, in the
manner shewn in the Drawings, and thereby presenting a series of helicoidal
planes, as before mentioned. These wheels may be applied as ordinary paddle
wheels at the sides of a vessel or at any other part. By giving a greater breadth
to the keel in proportion to the midship section of the vessel a kind of hold
will be formed, narrower than the width of the vessel, between which and the
hull of the ship, on each side, one of my wheels may be fitted without altering
the external appearance of the vessel.
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, constructing
paddle wheels with undulating propelling surfaces, substantially as herein-
before described and illustrated in the accompanying Drawings.
In witness whereof, I, the said Richard Archibald Brooman, have here-
unto set my hand and seal, this Twenty-eighth day of November, 'One
thousand eight hundred and sixty-three.
R. A. DROOMAN. (L.B.)