IMPROVEMENTS IN THE MODE OF AND APPARATUS FOR PROPELLING VESSELS IN WATER BY THE DIRECT AID OF STEAM OR HEATED AIR, THEREBY DISPENSING WITH THE USE OF ENGINES HAVING WORKING PARTS
Year: 1871

page_text: LETTERS PATENT to William Rennie, of Newry, Ireland, for the
Invention of "IMPROVEMENTS IN THE MODE OF AND APPARATUS FOR
PROPELLING VESSELS IN WATER BY THE DIRECT AID OF STEAM OR HEATED
AIR, THEREBY DISPENSING WITH THE USE OF ENGINES HAVING WORKING
PARTS."
Sealed the 4th June 1872, and dated the 18th December 1871.
PROVISIONAL SPECIFICATION left by the said William Rennie, at the
Office of the Commissioners of Patents, with his Petition, on the
18th December 1871.
I, WILLIAM RENNIE, of Newry, Ireland, do hereby declare the nature
of my said Invention for "IMPROVEMENTS IN THE MODE OF AND APPARATUS
FOR PROPELLING VESSELS IN WATER BY THE DIRECT AID OF STEAM OR HEATED
AIR, THEREBY DISPENSING WITH THE USE OF ENGINES HAVING WORKING PARTS,"
to be as follows:-
:-
This Invention relates to a simple and economical mode of and
apparatus for applying the direct force of steam to the propelling of

page_text: ships and boats, and consists essentially in the employment of one, two,
or more steam jet nozzles, supplied with steam direct from a boiler, and
discharging the same in the form of a jet or jets into a gradually
expanding discharge tube or tubes placed in any desired position "below
the water line of the ship or boat, through which tube or tubes a
constant flow or stream of water is maintained by the action of the
steam jet or jets at the smallest part of the tube, which tend to drive
out the water from one end of the tube or tubes as fast as it enters or
flows in through the expanded opposite end, both ends of the said tubes
-being open to the surrounding water. The size or power of the steam
jets is capable of variation by means of cocks, or of adjustable conical
or tapered spindles inside the steam nozzles.
SPECIFICATION in pursuance of the conditions of the Letters Patent,
filed by the said William Rennie in the Great Seal Patent Office
on the 15th June 1872.
t
TO ALL TO WHOM THESE PRESENTS: SHALL COME; I, WILLIAM
RENNIE, of Newry, Ireland, Engineer; send greeting.
آن
:
$1
WHEREAS Her most Excellent Majesty Queen Victoria, by Her
Letters Patent, bearing date the Eighteenth day of December, in the
year of our Lord One thousand eight hundred and seventy-one, in the
35th year of Her reign, did, for Herself, Her heirs and successors, give
and grant unto me, the said William Rennie, Her special license that
I, the said William Rennie, my executors, administrators, and assigns,
or such others as I, the said William Rennie, my executors, adminis
-trators; or 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 "IMPROVEMENTS IN THE MODE
-OF-AND-APPARATUS FOR PROPELLING VESSELS IN WATER BY THE DIRECT AID OF
STEAM OR HEATED AIR, THEREBY DISPENSING WITH THE USE OF ENGINES HAVING
WORKING PARTS," upon the condition (amongst others) that I, the said
William Rennie, my executors or administrators, by an instrument in
writing under my hand and seal, should particularly describe and
2520
*
=
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page_text: 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 imme-
diately after the date of the said Letters Patent.
NOW KNOW YE, that I, the said William Rennie, 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, reference being had to the accompanying
Drawings and to the letters and figures marked thereon, that is to
say:
My said Invention relates to a simple and economical mode of and
apparatus for applying the direct force of steam to the propelling of
ships and boats, and consists essentially in the employment of one, two,
or more steam jet nozzles, supplied with steam direct from a boiler, and.
discharging the same in the form of a jet or jets into a gradually
expanding discharge tube or tubes placed in any desired position below
the water line of the ship or boat, through. which tube or tubes a
constant flow or stream of water is maintained by the action of the
steam jet or jets at the smallest part of the tube, which tends to drive
out the water from one end of the tube or tubes as fast as it enters or
flows in through the opposite end, or through any number of. lateral
ducts. The size or power of the steam jets is capable of variation by
means of cocks, or of adjustable conical or tapered spindles inside the
steam nozzles.
And in order that my said Invention may be fully understood I shall
now proceed more particularly to describe the same, and for that purpose
shall refer to the several Figures on the annexed Sheet of Drawings,
the same letters of reference indicating corresponding parts in both
Figures.
Figure 1 of the Drawings represents a side elevation of the stern
portion of a vessel fitted with my improved means of propulsion, and
Figure 2 is a plan of the same, shewing the propelling apparatus partly
in horizontal section.
A is an ordinary or any other suitable steam generator; B is a steam
pipe leading direct from the boiler to the two steam jet nozzles C, C,
which are situate at or near the inner closed end of the two expanding

page_text: 1%
water
discharge tubes D, D, placed horizontally or nearly so at any convenient
distance below the level of the surrounding water, the said tubes' open-
ing direct through the stern or run of the vessel; as shown at E, E, and
having one or more branch pipes F, F, in communication with the
through openings G, G, in the sides of the vessel at one or more points a
situate between the steam jet nozzles C, C, and the discharge openings
at E. The steam when turned on passes from the boiler through the
nozzles C in the form of annular jets, the force of the jets being regulated
by the usual adjustable taper ended spindles H, H, fitted with hand
wheels I, I. These jets being directed against the water in the
tubes D, D, forces it out through the stern openings at E, E, which
water as fast as it is expelled is replaced by water entering through the
lateral openings G, G, and pipes F, F; two continuous streams are thus,
maintained by the action of the steam jets at C, C, which urge the
vessel forward: Of course a single or any number of tubes D, D, may. 1
be employed; and the water will be admitted and forced, out therefrom
at the points most suitable for the vessel in hand, and the number of
discharge tubes employed.
Having now described and particularly ascertained the nature of my
said Invention, and the manner in which the same is or may be used or
carried into effect, I would observe in conclusion that what I consider to
be novel and original, and therefore claim as the Invention secured to
me by the herein-before in part recited Letters Patent is, the application
and use of one or more steam jets in conjunction with one or more
expanding discharge tubes and inlet pipes to and in the propelling of 2
vessels, substantially as herein-before described.
In witness whereof, I, the said William Rennie, have to this my
Specification set my hand and seal, the Twenty-fifth day of