IMPROVEMENTS IN ADAPTING
Year: 1863

page_text: LETTERS PATENT to William Louis Winans, of Dover Street, in the
County of Middlesex, Gentleman, and Thomas Winans, of Baltimore, in
the United States of America, but now residing at Dover Street afore-
said, Gentleman, for the Invention of "IMPROVEMENTS IN ADAPTING
PROVISIONAL SPECIFICATION left by the said William Louis Winans
and Thomas Winans at the Office of the Commissioners of Patents, with
their Petition, on the 20th June 1863.
We, WILLIAM LOUIS WINANS, of Dover Street, in the County of Middlesex,
Gentleman, and THOMAS WINANS, of Baltimore, in the United States of
America, but now residing at Dover Street aforesaid, Gentleman, do hereby
declare the nature of the said Invention for "IMPROVEMENTS IN ADAPTING-
PROPELLERS FOR PROPELLING SHIPS OR VESSELS FOR OCEAN NAVIGATION," to be
as follows:-
Our Invention of "Improvements in Adapting Propellers for Propelling Ships
or Vessels for Ocean Navigation" consists in a combination of two screw pro-
pellers, one at each end of a ship or vessel of the ordinary form or type of hull.
Each propeller is to be of larger size than those heretofore in general use for
similar sized vessels for ocean navigation, so as to project above the surface of
the water when the vessel is fully loaded.. It likewise consists in the com-

page_text: bination of two propellers as above named with vessels of the ordinary type
in general use, but so modified towards the ends as to conform in general to
the form of the large hubs of the propellers.
By this Invention more propelling surface and a more constant immersion
of blades and a greater pitch of propeller can be obtained than has been
'heretofore had by vessels with screw propellers as heretofore used for ocean
navigation.
SPECIFICATION in pursuance of the conditions of the Letters Patent, filed
by the said William Louis Winans and Thomas Winans in the Great
Seal Patent Office on the 17th December 1863.
TO ALL TO WHOM THESE PRESENTS SHALL COME, we, WILLIAM
LOUIS WINANS, of Dover Street, in the County of Middlesex, Gentleman, and
THOMAS WINANS, of Baltimore, in the United States of America, but now
residing at Dover Street aforesaid, Gentleman, send greeting.
WHEREAS Her most Excellent Majesty Queen Victoria, by Her Letters
Patent, bearing date the Twentieth day of June, 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 heirs and successors, give and grant unto us, the
said William Louis Winans and Thomas Winans, Her special license that we,
the said William Louis Winans and Thomas Winans, our executors, admini-
strators, and assigns, or such others as we, the said William Louis Winans
and Thomas Winans, our 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 "In-
PROVEMENTS IN ADAPTING PROPELLERS FOR PROPELLING SHIPS OR VESSELS FOR OCEAN
NAVIGATION," upon the condition (amongst others) that we, the said William
Louis Winans and Thomas Winans, by an instrument in writing under our
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 we, the said William Louis Winans and Thomas
Winans, do hereby declare the nature of our said Invention, and in what
manner the same is to be performed, to be particularly described and ascer-

page_text: tained in and by the following statement, reference being had to the Drawing
hereunto annexed, and to the letters and figures marked thereon (that is to
say):
Our Invention of "Improvements in Adapting Propellers for Propelling
Ships or Vessels for Ocean Navigation" consists in a combination of two screw'
propellers, one at each end of a ship or vessel of the ordinary form or type of
hull. Each propeller is to be of larger size than the screw or stern propellers
heretofore in general use for similar sized vessels for ocean navigation. A
portion of the propellers will therefore project above the surface of the water
when the vessel is fully loaded.
As a modification of the above, the vessel (to which the two propellers are to
be adapted, one at each end, as already explained) may be so constructed at the
ends that the forward and after lines of the vessel below the water line will be
made to conform to or blend with the hubs of the propellers, which hubs for
this purpose are enlarged.
AN
By this Invention more propelling surface and a more uniform extent of
immersion of propeller is obtained, and a greater pitch of propeller can be em-
ployed than has hitherto been used in vessels with screw propellers as heretofore
constructed for ocean navigation. The machinery for driving the propellers is
to be placed between them. In some cases both propellers may be mounted
upon the same shaft, and the engines may thus be made to actuate both pro-
pellers simultaneously. In other cases the propellers may be mounted on
separate shafts and actuated by separate engines, so that the propellers may be
used singly or be driven either in the same or in opposite directions.
In the accompanying Drawing, Fig. 1 is a side elevation of a vessel with
our improvements adapted thereto. A, A, is the body of the vessel, which is
constructed in the usual manner; B, B, are two screw propellers of the ordinary
construction, but of greatly increased diameter, so that a large portion of the
blades will project above the surface of the water. One of these propellers is
placed in the dead wood at the stern as usual, and the other at the bows, but
projecting beyond the cutwater. Fig. 2 is a side elevation of a modification of
the above; Fig. 3 is an elevation of the stern end of the vessel. The propellers
are placed in the same position as in Fig. 1; but in this instance are provided
with a greater number of blades. The hub of the propeller is consequently
made of larger diameter, and the lines of the vessel are made to conform to or
blend with the periphery of the enlarged hub. These lines are moreover con-
tinued beyond the hub, which on the outer end is terminated by a conical
projection, as seen in Fig. 2, and therefore rotates with it. By "ocean navi-

page_text: gation," we mean in this Specification all navigation excepting that upon rivers,
canals, and lakes.
Having now described our Invention, and the manner of carrying the same
into effect, we claim the application of two large screw propellers to vessels for
ocean navigation in the manner and for the purpose herein set forth.
In witness whereof, we, the said William Louis Winans and Thomas
Winans, have hereunto set our hands and seals, this Seventeenth day of
December, in the year of our Lord One thousand eight hundred and
sixty-three
W*. L. WINANS.
(L.B.)
THOMAS WINANS: (L.B.).