IMPROVEMENTS IN SHIPS AND VESSELS
Year: 1884

page_text: I CHARLES WILSON DORSON, of Ivanseraie Constantinople Turkey Engineer, do
hereby declare the nature of my invention, for "IMPROVEMENTS IN SHIPS AND
VESSELS," to be as follows:-
I place a series of plates of Iron, or anyother suitable material, of four inches
in breadth, and length in proportion to draft of Ship, at the bows and quarters of
same, the upper ends of plates or vanes, to be attached a few inches below the load
line of Ship, and said plates to over lap each other at their edges half an inch,
leaving a slight opening between them, where they over lap for air vents, a space
to be left between vent plates or vanes, and Ships sides as Air reservoir, suitable
air ducts leading to same, the plates or vanes, to commence from stem of Ship and
carried a few feet abaft of where the bow wave is forined, the said plates reaching
down to Ships Bilge, again the plates to commence at the point where the vessel
begins to contract in her breadth, and continued aft to her steru post. the aft plates
arranged the same as forward or bow plates, the openings between plates or vanes
to face the stern part of Ship. instead of vertical plates, numerous circular scales
can be applied to the same use, -the Ship when in motion in a certain direction
the Water receeds in the opposite direction or apparently so thereby induceing a
current of Air to be ejected between plates or vanes causing an air cushion forward
of Ship and ameliorating Vacuum aft of same thereby Increasing her Velocity.

page_text: I, CHARLES WILSON DOBSON, of Ivanseraie Constantinople Turkey Engineer do
hereby declare the nature of my invention for "IMPROVEMENTS IN SHIPS AND
VESSELS" and in what manner the same is to be performed, to be particularly
described and ascertained in and by the following statement:-
I place a series of plates of Iron or anyother suitable material-of from two to
four inches in breadth (the thickness and length of said plates to be in proportion
to the dimensions of the Ship or Vessel to which they may be applied) at the bows
and quarters of the same, the said plates to be beveled off towards their edges to a
knife edge as shown in sectional drawing. the upper ends of plates or vanes, must
be attached, two or more inches, below the load line or Water line of Ship or
Vessel. the aforementioned plates or vanes to overlap each other at their edges
half an inch leaving a slight opening from a sixteenth to an eighth of an inch
between the plates or vanes where they overlap for air vents, numerous scales or
circular discs could be applied to the same use. a space to be left between the
inner side of vent plates or vanes, and the ship or vessels side (of from one to four
inches) according to the dimensions of Ship or Vessel, for an air reservoir, The
reservoir to be the same depth below the tops of the vent plates or vanes, as the
⚫vent plates or vanes are carried below the water line, which in large ships or
vessels will be one third the draft of same. In fast despatch boats, the vents or
vanes may be carried down to half draft of same, commencing a few inches below
water line. In torpedo boats the vent plates or vanes may be carried down to the
kelson of same, the openings between vent plates being slightly contracted as they
near the kelson. For large vessels that have a speed of from (fourteen to fifteen
knots per hour) one third their depth of draft for plates or vanes will be ample,
providing the draft of same is normal. The vent plates or vanes to commence abaft
the stem of ship or vessel, a suitable distance, so that the air ducts can be
conveniently applied that lead down to the air reservoir or reservoirs (as shown in
drawing-marked. B. B. B.) and carriend Aft from that point to the greatest
breadth of ship or vessel. The vent plates or vanes that are placed upon the ship
or vessels qarter to commence from where the ship or vessels begins to contract in
her breadth, and carried Aft to the stern post of same. In placing the vent plates
or vanes, upon a ship or vessel; the commencement (must be from the stern post) of
same, then carried forward to the aformentioned position-again commence abaft
the bow, and work forwards towards the stem of same, as far as before mentioned
position. In large ships or vessels there should be three reservoirs, separated from
each other by (fore and aft partitions) and each having an air duct of its own,
leading from above as (shown in drawings) marked a. a. a. The outer edges of the
aformentioned partitions being Joggled as represented in sectional drawing, to
receive the vent plates, or vanes on their inner or overlapped edges-as the plates
or vanes, have a much larger opening on their inner edges, as will be seen by the
sectional drawing, and to be made of such a thickness on their edges by light angle
Iron or other material, as they can receive countersunk headed screws, or bolts, by
which the plates or vanes are attached to the ship or vessels side. The fore and aft
division plates being securely fastened to the ship or vessels side.
For the further

page_text: support of vent plates or vanes in the (divisional compartments) fore and aft trellis
or open girders can be applied, so that there is no impediment of the supply of air
to vent plates or vanes. In the slight openings between vent plates or vanes, I
place small projections or studs of two or more inches pitch according to strength
In
of vent plates or vanes, so as to retain the normal openings between them.
carrying the air vent down to the boss of the propeller, I use an inverted cup of
suitable material, the edges of the larger diameter of same, to be beveled off from
the inner side to a knife edge, and to project from the stern post to within half an
inch of the leading edge of the propeller. The larger diameter of cup to be (one
fifth diameter of propeller) the smaller diameter to be made large enough, so as to
attach it, to the swell of stern post were the screw shaft is rove through. From
the deck above a suitable air duct leads down to the cup, either from the inside or
outside of ship or vessel. Therefore when the ship or vessel is going full speed,
the rush of water past the convexity of the cup, causes a partial Vacuum within
the same.
Air therefore rushes down to relieve the vacuum thus formed, and
releases the dead or drag water that is carried round by the propeller near its
centre, thereby greatly facillitating the velocity of its rotation. When the ship is
at full speed, the water rushing by the plates or vanes, before mentioned, induces a
current of air, to pass through the slight openings were they overlap each other,
thereby destroying the Attrition of the water, on the ship or vessels side, and the
partial vacuuin aft of the same and therefore causing little or no wake after the
ship or vessel. The vent plates or vanes at the stem of ship or vessel, having an
induced air current through them, by the ship or vessels velocity through the
water, the air will form an Air cushion forward on the bows of the ship or vessel,
thereby allowing the water to drag itself off with greater facility. In building
new ships or vessels, they should be Joggled as shown in the drawings so as to
form space for air reservoirs so that the vent plates or vanes would not tend to
distroy, the symmetry or outline of the ship or vessel. The advantages of this
invention for torpedo boats is a very great one as connexions made from bilge to
reservoirs would prove an efficient means of ejecting any superfluity of water,
caused by shot Holes, or other leakage-and at the same time, a very efficient
means of ventilating cabis and ships holds-Troop ships especially. if the vessels
have the aforementioned velocity.
"Having now particularly described and ascertained the nature of my said
Invention and in what manner the same is to be performed I declare that what
I claim is "
1st I firmly and truly believe myself to be the first and only Inventor of the type
of vent plates or vanes as herein set forth. for ships or vessels, and feel confident
that this Invention will add greatley to the speed of ships or vessels in general.
Torpedo boats in particular-their having an high speed.
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