IMPROVEMENTS IN CAPPLIANCES FOR VENTILATING SHIPS I f au t h
Year: 1883

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PROVISIONAL SPECIFICATION. left by the said George Alexander Calvert
and Frederick Colthurst Kelson at the Office of the Commissioners of Patents)
on the 27th February 1883.
GEORGE ALEXANDER CALVERT, (of the city and county of Cork, Engineer, and
FREDERICK COLTHURST KELSON, of Liverpool in the county of Lancaster, Engineer
IMPROVEMENTS IN CAPPLIANCES FOR VENTILATING SHIPS
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Movable cowls on the tops of, pipes reaching, into the holds, engine rooms, or,
other spaces to be ventilated whether, the said cowls are fitted with screws or other
contrivances or not, are only barely, efficient, for the purpose, of, ventilation when
the wind is, blowing or the ship moving at a high rate of speed through the
water
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hot and
The object of our invention is to provide, means by which efficient ventilation
may be ensured at all times; or at will.
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11
"
'In carrying our invention into. practice, we under the first part so combine an
annular or other steam or, air jet with the ordinary ventilating cowl having a
turning or adjustable mouth that ventilating air currents may be.induced through
the ventilating pipe when required by putting the said jet into action of A
Under the second part we combine a steam or air jet annular, or otherwise with
the ordinary or any, convenient, ventilating cowl and, with existing ventilating
passages or ways.
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When a steam jet is used steam is conveniently obtained through the steam pipes
leading to the deck winches or other supplementary engines. i
When an air jet is used compressed, air is obtained from
or from pumps in the engine room or chamber.
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a reservoir. or container
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page_text: SPECIFICATION in pursuance of the conditions of the Letters Patent filed
by the said George Alexander Calvert and Frederick Colthurst Kelson in the
Great Seal Patent Office on the 27th August 1883.
GEORGE ALEXANDER-CALVERT of the City and County of Cork. Engineer, and
FREDERICK COLTHURST KELSON of Liverpool in the County of Lancaster, Engineer.
"IMPROVEMENTS IN APPLIANCES FOR VENTILATING SHIPS
Movable cowls on the tops of pipes reaching into the holds, engine rooms or
other spaces to be ventilated,, whether the said cowls are fitted with screws or
other contrivances or not are only barely sufficient for the purpose unless the wind
is blowing with considerable velocity or the ship moving at a high rate of speed
through the water.
The object of our invention is to provide means by which efficient ventilation
may be ensured at all times. +
1.
!)
In carrying our invention into practice we under the first part so combine an
annular or other steam or air jet with the ordinary ventilating cowl having a
turning or adjustable mouth that ventilating air currents may be induced through
the ventilating pipe when required by putting the said jet into action.
Under the second part we combine a steam or air jet annular or otherwise with
the ordinary or any convenient ventilating cowl and with existing ventilating
passages or ways,
When a steam jet is used steam is conveniently obtained through the steam pipes
leading to the deck winches or other supplementary engine.
When an air jet is used compressed air is obtained from a reservoir or container
or from pumps in the engine room or elsewhere.
1:881
DESCRIPTION OF THE DRAWINGS,
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"
"
Fig 1 is a vertical section of ventilating appliances under the first part of our
invention, a is a stationary pipe or shaft secured to the deck and leading to the
hold, engine room, or space to be ventilated either directly or through a system of
passages or ways, b is the ordinary movable cowl free to be turned round on the
pipe or shaft a, c hole cut or made through the top of the cowl." dejector carried
by the cone e which rests on the top of the pipe or shaft a. f'steam pipe leading
down through the pipe or shaft a to the steam pipes in communication with the
boiler or generator. The said pipe f may be used for the conveyance of compressed
air to the ejector instead of steam, g suction and delivery pipe passing through
the hole c in the top of the cowl b. The ejector. apparatus may be easily removed
from the cowl when not required after uncoupling the pipe by lifting off the
upright ejector pipe and withdrawing the ejector through the mouth' of the cowl.
A hose is advantageously used to connect the steam pipe and ejector.
.
11.
Fig 2 is a vertical section of a modification in which the ejector apparatus may
be placed-in position and removed without disconnecting the apparatus in' this case
the suction and delivery pipe is curved so as to pass out through the mouth of the
cowl instead of through a hole in the top The steam pipe is also led through the
mouth of the cowl instead of down through the pipe or shaft'a for convenience of
connecting to winch pipes or steam connections above deck."
113 '. I i 7.
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Fig 3 is a vertical section of ventilating appliances under the second part of our
invention. h is a cowl of any usual or desired construction with a pipe or shaft i
leading to the passages ; which serve as ways through which engine rooms cabins
and other spaces of the ship or vessel are ventilated. The ejector k rests on the bolt

page_text: heads within the pipe or shaft i and the steam or air pipe m is led down the said
pipe or shaft below the deck n and thence to the steam pipes in communication with
the generator or air reservoir. Under this part of our invention the cowl may be
either fixed or movable and the existing ventilating ways or passages are utilized.
If the force of the wind or the motion of the ship or vessel does not cause
sufficient outflow of air through the cowls the appliances hereinbefore described are
placed in position within the cowl and the ejectors are set in operation so as to
cause an increased flow of air through the said cowls and cause more efficient
ventilation.
Having now described and particularized the nature of the said invention in
such manner that others will be enabled to carry our improvements into effect.
We claim:
Steam or air jet apparatus and adjustable cowls combined and operating
substantially in the manner and for the purpose setforth under the first part.
Steam or air jet apparatus in combination with cowls and ventilating passages
or ways substantially as setforth for the purpose specified.
In Witness Whereof I the said Frederick Colthurst Kelson have hereunto set
my hand and seal this twenty fifth day of August in the year of Our Lord, one
thousand eight hundred and eighty three.
F. C. KELSON.
(L.S.)