Improvements in Ventilators for Ships and in Pipes or Ducts therefor and for other Passages or Openings through Ships' Decks.
Year: 1887

page_text: Date of Application, 10th Nov., 1887
Complete Specification Left, 8th Aug., 1888
Complete Specification Accepted, 14th Sept., 1888
PROVISIONAL SPECIFICATION.
Improvements in Ventilators for Ships and in Pipes or Ducts
therefor and for other Passages or Openings through Ships'
Decks.
We, DAVID COWAN, of Mount Gerald, Larbert, in the County of Stirling, North
Britain, Civil Engineer, Manager for Carron Company, incorporated by Royal
Charter, and ALEXANDER ROBERTSON, of 6 Dawson Terrace, Carron, in same County,
Toolmaker, do hereby declare the nature of this Invention to be as follows, that is
to say:
This Invention has for its objects, to make improved ventilators well suited for
forecastles and other parts of ships, and which can be easily adjusted for any desired
extent of opening or be completely closed in a manner to exclude water; and to make
for such ventilators or other similar passages or openings through ships decks,
improved pipes which can be easily fixed in a manner to prevent leakage through
the decks.
In carrying out our Invention we apply to the top of an improved pipe of
the kind hereinafter described, a cap which may be of any suitable kind such
as is used with ordinary forecastle ventilators; and we fix to such cap a central
spindle extending sufficiently down to be accessible from below and having a
handle at its lower end. A part of the spindle is made square and has fitted to it
a bush made in halves or with a slit at one side. A part of the bush is screwed
externally and another part of it is made conical externally, and the two parts adapted
to the interior of a hollow boss formed on a bridge piece fixed across the ventilator
pipe. The screwed part of the bush works in an internal screw in the boss, and the
conical part of the bush bears on a hollow conical part of the boss. When the bush is
turned by turning the spindle in one direction the action of the conical parts makes it
grip the spindle and hold it firmly. To open, adjust, or close the ventilator cap the
spindle is turned to loosen the bush and is then moved up or down as required, being
fixed by turning the spindle so as to tighten the bush. Any other suitable arrangement
077

page_text: of the bush so as to tighten and loosen by turning the spindle may be employed. A
rubber ring is fixed inside of the ventilator cap so as to bear on the top edge of the
ventilator pipe and make a watertight joint when the cap is closed.
The ventilator pipe has a part entering down into or through the hole in the deck,
and it has a flange to bear on the deck and make a watertight joint, whilst it extends
to a greater or less height above the flange. The pipe is made of wrought iron or
steel so as to be strong and light; and instead of the flange and bottom end being
made in a separate piece, the flange is formed on a plain pipe length by heating a
zone of the pipe, and by applying end pressure to the pipe whilst it is confined in
suitable dies. The heated part of the pipe becomes forced outwards and doubled
together into the form of a flange; the operation being effected with one or more
heatings as may be found necessary, and the flanged pipe being subsequently well
annealed.
Datad this Ninth day of November 1887

page_text: COMPLETE SPECIFICATION.
Improvements in Ventilators for Ships and in Pipes or Ducts
therefor and for other Passages or Openings through Ships'
Decks.
We, DAVID COWAN, of Mount Gerald, Larbert, in the County of Stirling, North
Britain, Manager for Carron Company, incorporated by Royal Charter, and ALEXANDER
ROBERTSON, of 6 Dawson Terrace, Carron, in the same County, Toolmaker, do hereby
declare the nature of this invention and in what manner the same is to be
performed, to be particularly described and ascertained in and by the following
statement, that is to say :-
This Invention has for its objects to make improved ventilators well suited for
forecastles and other parts of ships, and which can be easily adjusted for any desired
extent of opening, or be completely closed in a manner to exclude water; and to make
for such ventilators or other similar passages or openings through ships' decks,
improved pipes which can be easily fixed in a manner to prevent leakage through
the decks.
And in order that our said Invention and the manner of performing the same
may be properly understood we hereunto append a sheet of explanatory drawings to
be hereinafter referred to and representing a ship's ventilator as constructed according
to one modification of our Invention, figures, 1, and 2, of these drawings being
horizontal and vertical sections, respectively, of the ventilator.
In carrying out our Invention according to the modification shown in the
accompanying drawings we apply to the top of a pipe, A, which is by preference of
the improved kind shown and hereinafter described, a cap, B, which may be of any
suitable kind such as is used with ordinary forecastle ventilators and which is shown
as fitted with a glass plate, C, for the purpose of utilising the pipe for the transmission
of some light through the deck. We fix to the cap, B, a central spindle, D,
extending sufficiently down to be accessible from below, and having a handle, E, at
its lower end. The spindle, D, or a part of it is made square or of any convenient
non-circular form in cross section and has fitted to it a bush, F, made in halves or
with a slit at one side, or in three or more pieces. A part of the bush, F, is screwed
externally and another part of it is made conical externally; and the two parts are
adapted to the interior of a hollow boss, G, formed on a bridge piece, H, fixed across
the ventilator pipe, A. The screwed part of the bush, F, works in an internal screw
in the boss, G, and the conical part of the bush bears on a hollow conical part of the
boss. When the bush, F. is turned by turning the spindle, D, in one direction its
conical part is by the screw action drawn towards the smaller end of the conical
hollow of the boss and the bush is in consequence made to grip the spindle and hold
it firmly. To open, adjust, or close the ventilator cap, B, the spindle, D, is turned
to loosen the bush, F, and is then moved up or down as required, being fixed by
turning the spindle so as to tighten the bush. Any other suitable arrangement of

page_text: the bush so as to tighten and loosen by turning the spindle may be employed. A
rubber ring, J, is fixed inside of the ventilator cap, B, so as to bear on the top edge
of the pipe, A. and make a watertight joint when the cap is closed. This rubber
ring, J, is in the drawing shown as also forming a watertight elastic joint round the
glass plate, C.
The spindle, D, with its bush, F, or equivalent and boss, G, in which it works is
obviously applicable for adjusting and holding a ventilator cover arranged in any
one of a variety of ways. Thus for example the cover might be hinged at one side
to a pipe or frame, in which case the joint connecting the spindle, D, to the cover,
and the boss, G, in which the bush, F, works must be fitted so as to be capable of
swivelling.
The ventilator pipe, A, has a part, K, entering down into or through the hole in the
deck, I, and it has a flange, M, to bear on the deck, and make a watertight joint,
whilst it extends to a greater or less height above the flange, M. The pipe, A, is
made of wrought iron or steel so as to be strong and light; and instead of the
flange, M, or flange and bottom, K, being made in a separate piece, the flange is
formed on a plain pipe length by heating a zone of the pipe, and by applying end
pressure to the pipe whilst it is confined in suitable dies. The heated part of the pipe
becomes forced outwards and doubled together into the form of a flange, the operation
being effected with one or more heatings as may be found necessary, and the flanged
pipe being subsequently well annealed.
Having now particularly described and ascertained the nature of our said Inven-
tion and in what manner the same is to be performed, we declare that what we
claim is :-
1-The combination of parts forming our improved ship's ventilator substantially
as hereinbefore described and as shown in the accompanying drawings.
2-The device for adjusting and holding the ventilator cap or cover and consisting
of the spindle with its bush and the boss to which the bush is adapted these parts
being arranged so that the bush is tightened or loosened by turning the spindle, the
spindle being free to move through the loosened bush substantially as hereinbefore
described.
3-The improved mode of forming a flange on a pipe for a ship's ventilator or other
passage or opening through a ship's deck substantially as hereinbefore described.
Dated this Sixth day of August 1888.
EDMUND HUNT,
Applicants' Agent.