IMPROVEMENTS IN GIVING MOTION BY SAILS TO SCREW AND OTHER PROPELLERS OF SHIPS AND VESSELS
Year: 1858

page_text: LETTERS PATENT to James Dupré Brabazon, of Lane's Hotel, St. Alban's
Place, Haymarket, Esquire, for the Invention of "IMPROVEMENTS IN
GIVING MOTION BY SAILS TO SCREW AND OTHER PROPELLERS OF SHIPS AND
VESSELS."
Sealed the 11th February 1859, and dated the 28th August 1858.
PROVISIONAL SPECIFICATION left by the said James Dupré Brabazon
at the Office of the Commissioners of Patents, with his Petition, on the
28th August 1858.
I, JAMES DUPRÉ BRABAZON, of Lane's Hotel, St. Alban's Place, Haymarket,
Esquire, do hereby declare the nature of the Invention for "IMPROVEMENTS
IN GIVING MOTION BY SAILS TO SCREW AND OTHER PROPELLERS OF SHIPS AND
VESSELS," to be as follows:-
This Invention has for its object improvements in giving motion by sails to
screw and other propellers of ships and vessels. For these purposes a shaft
or axis is used, running, by preference, in a direction fore and aft the ship or
vessel; this shaft or axis is supported in suitable bearings above the deck. To
a boss on the shaft or axle are applied a series of radial arms, according to
the largest number of sails which are to be used. To each of these arms a
sail may be applied, which may be of the form of a lug sail, or of other con-
venient shape. Each sail is kept extended when in use by a suitable spar,
and by means of cords and tackle; such sails are kept more or less inclined to

page_text: suit the direction of the wind. The shaft or axis above mentioned gives
motion to the screw or other propeller by means of a chain and chain wheels,
or by an upright shaft, or by other means and gearing. By the means above
described a ship or vessel may not only be propelled in aid of or independently
of steam or other power, but by such means the strain on the cable when a
ship or vessel is at anchor may be reduced.
SPECIFICATION in pursuance of the conditions of the Letters Patent, filed
by the said James Dupré Brabazon in the Great Seal Patent Office on
the 28th February 1859.
TO ALL TO WHOM THESE PRESENTS SHALL COME, I, JAMES
DUPRÉ BRABAZON, of Lane's Hotel, St. Alban's Place, Haymarket, Esquire,
send greeting.
WHEREAS Her most Excellent Majesty Queen Victoria, by Her Letters
Patent, bearing date the Twenty-eighth day of August, in the year of our Lord
One thousand eight hundred and fifty-eight, in the twenty-second year of Her
reign, did, for Herself, Her heirs and successors, give and grant unto me,
the said James Dupré Brabazon, Her special licence that I, the said James
Dupré Brabazon, my executors, administrators, and assigns, or such others
as I, the said James Dupré Brabazon, 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 Inven-
tion for "IMPROVEMENTS IN GIVING MOTION BY SAILS TO SCREW AND OTHER
PROPELLERS OF SHIPS AND VESSELS," upon the condition (amongst others) that
I, the said James Dupré Brabazon, 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 James Dupré Brabazon, 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 giving motion by sails to-

page_text: screw and other propellers of ships and vessels. For these purposes a shaft or
axis is used, running, by preference, in a direction fore and aft the ship or
vessel; this shaft or axis is supported in suitable bearings above the deck.
To a boss on the shaft or axle are applied a series of radial arms, according to
the largest number of sails which are to be used. To each of these arms a
sail may be applied, which may be of the form of a lug sail, or of other con-
venient shape. Each sail is kept extended when in use by a suitable spar,
and by means of cords and tackle; such sails are kept more or less inclined to
suit the direction of the wind. The shaft or axis above mentioned gives
motion to the screw or other propeller by means of a chain and chain wheels,
or by an upright shaft, or by other means and gearing. By the means above
described a ship or vessel may not only be propelled in aid of or independently
of steam or other power, but by such means the strain on the cable when a
ship or vessel is at anchor may be reduced.
And in order that my said Invention may be most fully understood and
readily carried into effect I will proceed to describe the Drawing hereunto
Figure 1 is a front view of apparatus, and Figure 2 is a transverse section
of apparatus arranged according to my Invention, for giving motion to a screw
or other propeller.
a is an axis, which is mounted in bearings carried by two masts or other
strong supports attached to the ship or vessel; 6 is a boss on this axis, having
the radial arms c, c, fixed into it; each of these arms I prefer should be about
equal in length to the beam of the ship or vessel to which it is applied, and each
arm carries a sail d, one edge of the sail being fastened to the arm c, and the
opposite edge to a yard e, which is attached to the upper end of the sparf,
and thus the sail is kept distended, the lower end of the sparf being con-
nected with the arm c by a ring and eye or other suitable coupling. To the
upper end of each of the spars f two ropes g and h are attached, leading to
the arms c, c, next to that on which the sail is mounted, but leading in opposite
directions. On these arms the ropes g and h pass through blocks, and are
then brought down and made fast to the rings i and j respectively, which are
capable of turning and sliding on the axis a; the rings i and j are embraced
by pieces k, to which tackles are connected, so that either one ring or the
other can be hauled from the boss 6 towards the mast or support carrying the
axis; thus the spars fand the sails d can be set at any desired angle to the
arm c, so that the wind may strike the sails in such a direction as to cause

page_text: the axis a to revolve in one or other direction as may be desired, or the
revolution of the axis may be stopped by so setting the sails d that they
exactly coincide with the direction of the wind. The rings i and j revolve
with the boss b and arms c. The power may be conveyed from the axis a to
the propeller shaft in any convenient manner. I however prefer to mount a
chain wheel on the axis a, and another smaller chain wheel on the propeller
shaft, and to arrange an endless chain from the one to the other. If a screw
propeller be employed, I prefer that it should make about ten revolutions for
one of the axis a. When one apparatus only is used, I prefer to place it
nearly in the centre of the vessel; but when two are employed, I place one
near the fore part and the other near the stern of the vessel. The propeller
shaft of the vessel may, if it be desired, be also coupled with steam engines,.
in order to give increased speed to the vessel.
In witness whereof, I, the said James Dupré Brabazon, have hereunto
set my hand and seal, this Twenty-eighth day of February, in the year
of our Lord One thousand eight hundred and fifty-nine.
Witness,
S. CARPMAEL.
JAMES DUPRE BRABAZON. (L.S.)