Year: 1898

page_text: Date of Application, 20th Apr., 1898-Accepted, 20th May, 1898
I, JOHN DANBY, of Foggy Furze, Hartlepool, in the County of Durham,
Superintendent Engineer, do hereby declare the nature of said invention and in
what manner the same is to be performed to be particularly described and
ascertained in and by the following statement :-
My invention has reference to the further development of the system of
ventilation described in my Patent No. 271 of 1897, in which the upcast current in
an annular shaft surrounding the chimney, and protected from external radiation
by non-conducting composition, is utilized to ventilate the cargo holds, coal bunkers,
ballast tanks, or other spaces, by drawing away by such current foul air or gases
from the cargo holds, coal bunkers, or other spaces, to be replaced by pure air, with
the objects of preventing injury to cargoes by over-heating and the danger of
explosion or fire by gases from the coal in the bunkers or as cargo.
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The accompanying drawing shews the application of my invention to a steam
ship, the main portion of which only is shewn, viz., the stoke hold, coal bunkers,
the engine room, and two main holds with the "floors or ballast tanks, but it
will be readily understood that the connections may be extended to other holds or
spaces requiring to be ventilated as the fore and after peaks, the double bottoms,
ballast tanks throughout or to other additional coal bunkers.
Fig. 1 is a half thwartship section through the stoke-hold;
Fig. 2 a fore and aft section from the forward boiler bulkhead to the after engine
room bulkhead ; and
Fig. 3 is a half plan of the same portion.
A is the forward bulkhead next the fore hold B, C the forward engine room
bulkhead next the boiler room, and D is the after engine room bulkhead next the
after hold E. F are the coal bunkers, disposed on each side of the vessel in this
case, but, where extra coal space is required, transverse or other extra bunkers may
be constructed as transversely or between the main deck G and the upper deck.
There are four boilers the uptakes of which unite and join the chimney. The
chimney H, ventilating shaft J covered with non-conducting composition K and
opening into the chimney above the upper deck, with the usual air casings and
fittings, are all as fully described and shewn in my Specification of Patent No. 271
of 1897.
Upon each of the bulkheads A and D are shut off valves L opening into the fore
and aft holds respectively from which valves pipes M lead direct into the ventilating
shaft J. The valve N leads by pipes downward to the ballast tanks, double
bottom or "floor space, according to the construction of the vessel.
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The gases from the coal in the bunkers are drawn away by perforated
pipes P1, P2, and P³, enclosed in outer pipes Q1, Q2, and Q³, also perforated to
prevent coal dust choking the pipes. These pipes extend from top to bottom and
at top are connected to pipe R on which is a shut off valve S from which pipes T
lead direct into the ventilator.
When extra cargo holds, coal bunkers, or other spaces are to be ventilated
additional valves are fitted with pipes leading from said valves to the ventilator.

page_text: 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 :-
:-
The improvements in the ventilation of steam ships consisting in connecting the
cargo holds, coal bunkers, ballast tanks, or other spaces, by valves and pipes with
an upcast ventilating shaft surrounding the boiler chimney which forms part of
my Patent No. 271 of 1897, and fully described and illustrated by the Specification
and drawings therewith.
D
11000
T. J. DANSON,
Agent for Applicant, Newcastle-upon-Tyne.