IMPROVEMENTS IN PROPELLERS, AND DAASAWA NAWERADED
Year: 1875

page_text: LETTERS PATENT to Edward Deakin, of Southport, in the County of
Lancaster, for the Invention of "IMPROVEMENTS IN PROPELLERS, AND
DAASAWA
NAWERADED "
PROVISIONAL SPECIFICATION left by the said Edward Deakin at the
Office of the Commissioners of Patents, with his Petition, on the
13th April 1875.
I, EDWARD DEAKIN, of Southport, in the County of Lancaster, do
5 hereby declare the nature of the said Invention for "IMPROVEMENTS
IN PROPELLERS, AND IN THE ARRANGEMENT AND POSITIONS OF SAME FOR NAVIGABLE
VESSELS," to be as follows :—

page_text: SPECIFICATION in pursuance of the conditions of the Letters Patent,
filed by the said Edward Deakin in the Great Scal Patent Office on
the 12th October 1875.
TO ALL TO WHOM THESE PRESENTS SHALL COME, I, EDWARD
DEAKIN, of Southport, in the County of Lancaster, send greeting
WHEREAS Her most Excellent Majesty Queen Victoria, by Her
Letters Patent, bearing date the Thirteenth day of April, in the year
of our Lord One thousand eight hundred and seventy-five, in the
thirty-eighth year of Her reign, did, for Herself, Her heirs and suc-
cessors, give and grant unto me, the said Edward Deakin, Her special
licence that I, the said Edward Deakin, my executors, administrators,
and assigns, or such others as I, the said Edward Deakin, 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 thercin
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 PROPELLERS,
AND IN THE ARRANGEMENT AND POSITIONS OF SAME FOR NAVIGABLE VESSELS,"
upon the condition (amongst others) that I, the said Edward Deakin,
my executors or administrators, by an instrument in writing under my,
or their, or one of their hands and scal, 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 Edward Deakin, do hereby declare
the nature of my said Invention, and in what manner the same is
to be performed, to be particularly described and ascertained in and
by the following statement.

page_text: My Invention consists of a duplex disconnecting paddle, cach half
being formed of removeable blades radiating at an angle or pitch from a
centre or boss, such angle or pitch being capable of adjustment, and the
blades of the paddles being respectively set at opposite angles, and the
half paddles being free to be worked together or separately as may be
required, namely, together for going ahead or astern, and separately for
turning to port or starboard.
The duplex paddle is fitted in a framework or otherwise at the stern
of the vessel, and is keyed and carried on athwart ship, shafts driven by
any suitable machinery, the line of the force or combined action of the 1
duplex paddles when working together being fore and aft, but when
working separately, and one of the propellers reversely the force is to
port or starboard, as the case may be.
A modification of my Invention consists in placing the paddle on a
framework or otherwise at the bow of the vessel in manner similar to 1
that described for the stern of the vessel.
A second modification of my Invention consists in placing the com-
bined duplex paddle amidships, and in the channel formed between twin
boats.
A third modification of my Invention consists in placing the respective 2
paddles forming my propeller one on each side of the vessel in position
similar to an ordinary side wheel, and in some cases I increase the power
by placing two or more wheels on cach side of the vessel, the blades
always being set at opposito angles on the respective sides of the
vessel.
In fitting my Invention to a navigable vessel I by preference set the
duplex paddle so as to submerge only the portion underneath the boss
when the vessel is fully laden.
2
The before-going being the nature, object, and purposes of this my
Invention I will now proceed to describe more in detail how the same 3
may be carried out into practical effect, reference being had to the
accompanying two Sheets of Drawings making a part of this Specifica-
tion. Like letters and figures on the Drawings denote similar parts, and
also correspond with those in the following explanation.—
Figure 1, Sheet 1, illustrates a vertical elevation of a propeller or 3
paddle constructed according to my Invention.

page_text: Figures 9, 10, and 11, Shoot 2, illustrate a position or arrangement of
propellers or duplex paddles for a barge or vessel.
Referring to Figures 1 and 2 it will be seen that my Invention consists
of a duplex disconnecting paddle formed of removcable blades or
arms A, A², radiating at an angle or pitch from a centre or boss B, B',
such angle or pitch being capable of adjustments by means of lock nuts,
and the blades A, A', being respectively set at an opposite or pitch,
and the half paddles, consisting of the blades A and the boss B of the
one part, and the blades A¹ and the boss B¹ of the other part, being free
to bo worked together or separately as may be required, namely, together
for going ahead or astern, and separately for turning to port or starboard.
The propeller or duplex paddle, as illustrated at Figures 1 and 2, is
fitted in a framework, box, or boxes at the stern or bow of the
vessel, or on each side of the bow or stern of the vessel, as illus-
trated in Figures 9, 10, and 11, or the propeller or duplex paddle
may be placed amidships and in the channel formed between twin boats,
or the propeller or duplex paddle may be placed with one paddle, namely,
the blades A and boss B on one side of the vessel, and the blades A' and
boss B¹ on the other side of the vessel, in position similar to an ordinary
side wheel, and in some cases I increase the power by placing two or
more wheels on each side of the vessel, but in all instances I would have
it understood that the blades A, A³, are set at opposite angles, and
always exert their force in a fore-and-aft line when working ahead or

page_text: astern, and are submerged on the under side of the boss only. When it
is required to use the propellers for turning the vessel the force is
exerted athwart ships by stopping or reversing one propeller, as will be
understood
Having now described and ascertained the nature, object, and purposes
of this my Invention, and shown how the same may be carried out into
practical effect, I would have it understood that I do not confine myself
to any particular size or dimension of a propeller constructed according
to my Invention, nor do I confine myself to any particular style or shape
of blade, or to any particular angle or pitch at which the blades may bo
set on the boss, as the same may be considerably varied without departing
from my Invention; but what I claim as my Invention and secured to
me by Letters Patent as aforesaid is,-
-
Firstly. The improvements in propellers and in the arrangement and
positions of same for navigable vessels, substantially in the manner and
for the purposes herein-before described and set forth.
Secondly. The construction, use, and application of a propeller, .being
a duplex paddle, cach half being formed of radial blades set respectively
at opposite pitches, such as shown at Figures 1 and 2 of the accom-
panying Drawings, substantially in the manner and for the purposes set
forth in the before-going Specification.
Thirdly. The arrangement and method of placing a duplex paddle, as
constructed according to this Invention, at the stern of a vessel, and to
exert its force in the fore-and-aft line of such vessel, substantially in the
manner and for the purposes set forth in the before-going Specification.
Fourthly. The arrangement and method of placing a duplex paddle,
as constructed according to this Invention, at the bow of the vessel, and
to exert its force in the fore-and-aft line of such vessel, substantially
in the manner and for the purposes set forth in the before-going
Specification.
Fifthly. The arrangement and method of placing a duplex paddle on
cach side of the bow or stern of the vessel, such as illustrated at Figures 9,
10, and 11, Sheet 2, of the accompanying Drawings, substantially in the
manner and for the purposes set forth in the before-going Specification.
Sixthly. The arrangement and method of placing a propeller or duplex

page_text: paddle, according to my Invention, amidships and in the channel formed
between twin boats, substantially as set forth.
Seventhly The arrangement and method of placing the respective
paddles forming my propeller one on cach side of a vessel in position
similar to an ordinary side wheel, substantially as set forth.
In witness whereof, I, the said Edward Deakin, have hereunto set
my hand and seal, this Eighth day of October, in the year of our
Lord One thousand eight hundred and seventy-five.