IMPROVEMENTS IN PROPELLING VESSELS
Year: 1854

page_text: PROVISIONAL SPECIFICATION left by the said Edward Palmer at the
Office of the Commissioners of Patents, with his Petition, on the
11th September 1854.
I, EDWARD PALMER, of Southampton, do hereby declare the nature of the
Invention for "IMPROVEMENTS IN PROPELLING VESSELS" to be as follows:-
My Invention consists in so constructing the frames to which propellers are
attached, that the blades or propellers, or any of them, may be removed without
difficulty, and also offer facilities for applying more or less blades or propellers
as required. For this purpose the radial stays are formed with grooves, or
grooves are applied to them, and the blades or propellers being formed of a
portion of a circle are attached by sliding into these radial grooves, and fastened
therein by bolts or rivets.

page_text: SPECIFICATION in pursuance of the conditions of the Letters Patent, filed
by the said Edward Palmer in the Great Seal Patent Office on the
10th March 1855.
TO ALL TO WHOM THESE PRESENTS SHALL COME, I, EDWARD
PALMER, of Southampton, send greeting.
WHEREAS Her most Excellent Majesty Queen Victoria, by Her Letters
Patent, bearing date the Eleventh day of September, in the year of our Lord
One thousand eight hundred and fifty-four, in the eighteenth year of Her
reign, did, for Herself, Her heirs and successors, give and grant unto me, the
said Edward Palmer, Her special licence that I, the said Edward Palmer,
my executors, administrators, and assigns, or such others as I, the said Edward
Palmer, 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. Juvention for "IMPROVEMENTS IN
PROPELLING VESSELS," upon the condition (amongst others) that I, the said
Edward Palmer, by an instrument in. writing under my hand and seal, should
particularly describe and ascertain the nature of the said Invention, and iii
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 Palmer, 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) :-
My Invention consists in so constructing the frames to which propellors are
attached, that the blades or propellers, or any of them, may be removed without
difficulty, and also offers facilities for applying more or less blades or propellers
as required. For this purpose the radial stays are formed with grooves, or
grooves are applied to them, and the blades or propellers being formed of a
portion of a circle are attached by sliding into these radial grooves, and
fastened therein by bolts or rivets.
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
annexed.

page_text: DESCRIPTION OF THE DRAWING.
Figure 1 is a front view, and Figure 2 a side view, of a propeller,
arranged according to my Invention. a, a, a, a, are four arms, which are
attached to the boss b; c, c, c, c, are four other arms which are attached to the
boss d. At the centres of the bosses 6 and d there are square holes, through
which the square ends of the hollow axis e pass, so as to connect the parts
together; the propeller shaft passes through the hollow axis, and is keyed or
otherwise fastened thereto. 9, 9, 9, 9, are curved stays between the arms
a, a, a, a; and h, h, h, h, are similar stays between the arms c, c, c, c; i, i, i, i,
are the four propelling blades, which I prefer to set on the shaft at an angle of
forty-five degrees thereto, at which angle also the arms a, a, a, a, and c, c, c, c,
are set on the bosses b and d. The blades i, i, i, i, are supported between the
bars k, k; these bars are connected at one end to the arms a, a, a, a, and at
the other end to the curved stays h, h, between the arms c, c, c, c. 1, 1, are cross
bars or stays between the arms a, a, c, c. Figure 3 is a section through one
of the arms a, shewing the manner in which the blades i, i, i, i, slide in grooves
in the said arms, so that they can easily be removed when required for sailing,
or when it is desired to use only two blades; m is a bolt by which the blade
is fixed in the arm.
Having thus described the nature of my Invention, and the manner of
performing the same, I would have it understood that I do not confine myself
to the precise details herein described; but what I claim is, the arrangement
or combination of apparatus herein described for propelling vessels.
In witness whereof, I, the said Edward Palmer, have hereunto set my
hand and seal, this Tenth day of March, in the year of our Lord
One thousand eight hundred and fifty-five.
Witness,
J. G. TONGUE.
EDWARD PALMER: (L.B.)