Improvements in Combined Fishing and Lifeboats to be Propelled by Hydraulic Mechanism, Actuated by Steam, Electric, or other known Power.
Year: 1892

page_text: Date of Application, 9th Aug., 1892
Complete Specification Left, 9th May, 1893-Accepted, 9th Aug., 1893
PROVISIONAL SPECIFICATION.
Improvements in Combined Fishing and Lifeboats to be Propelled
by Hydraulic Mechanism, Actuated by Steam, Electric, or other
known Power.
I, JOSEPH FLETCHER GREEN of Blackwall in the County of Middlesex, a
member of the Firm of Richard and Henry Green Shipbuilders of Blackwall Yard
London do hereby declare the nature of this invention to be as follows:-
--
This invention has for its object a fishing and lifeboat combined to be propelled
by hydraulic mechanism actuated by steam, electric, or other known power.
The boat may be constructed of iron, steel, wood, or any other suitable material,
and divided into as many watertight compartments as may be desired. She may
be lined between the ribs, or timbers, underneath the deck, or other place with
cork, or any other buoyant material.
For preserving the fish alive the vessel may be fitted with a well with holes in
the bottom. In order to have a continuos current of water through the well a
pipe may be carried from the donkey engine in engine room to the after side of
the well at the level of the water line which can draw off the water as well as the
film from the fish the supply of water being kept up by the holes in the bottom,
or the above current may be accomplished by any other approved means.
may also be fitted with a cold chamber in order to preserve the dead fish.
She
The steam for actuating the hydraulic mechanism is generated in a boiler
working at a pressure of say 100 lbs. fitted with a furnace for burning coal, coke,
wood or oil, and this boiler is placed in one of two separate watertight compart-
ments in which a continual supply of air may be kept up by means of a cowl
ventilator containing a fan worked by steam.
In the 2nd compartment immediately abaft this is placed a compound surface
condensing engine which works a centrifugal pump or pumps. This pump receives
water from below the bottom of the boat and ejects it through the sides and in
this consists the motive power.
The inlet or inlets are in the form of a scoop projecting below the bottom of the
boat and conveys the water without shock to the pump or pumps at a velocity
nearly equal to the speed of the boat through the water. The cross sections of
the hull in the neighbourhood of the inlet are so arranged that the immersed
section abaft the inlet is larger than the section in front of it by an amount equal
to the area of the orifice.
"
The water is delivered by the pump through the discharge pipes, one on each
side of its periphery. At a short distance from the pump each of these discharge
pipes branches into two, one of which leads forward the other aft. At the point
where they divide there are valves which can be actuated from the deck and which
directs the water into either of the branches at will according as it is desired to
drive the vessel ahead or astern, or turn her round for steering. The nozzels on
the go-astern discharge pipes are above the water line, but the go-ahead nozzels
discharge below water.
These below water nozzels are partly built into the side of the boat which is
recessed to receive them and the sectional area of the hull abaft the nozzel is less
than the sectional area forward of them by an amount equal to the area of the
nozzels.
In case of touching the ground, or fouling anything, the lower part of the
rudder works up and down automatically.

page_text: Having now particularly described and ascertained the nature of my inven-
tion, and in what manner the same is to be performed, I declare that what I
claim is :-
1. A combined fishing and lifeboat constructed as described and propelled by
means of a centrifugal pump, having an inlet in the form of a scoop arranged as
described, and with outlets formed in the hull in the manner described.
2. A combined fishing and lifeboat propelled by means of a centrifugal pump,
having the inlet in the form of a scoop arranged as described.
3. A combined fishing and lifeboat propelled by the reaction of jets of water.
Dated this 6th day of May 1893.
JOS. F. GREEN.