A New or Improved Ventilating Apparatus.
Year: 1896

page_text: Date of Application, 15th Jan., 1896
Complete Specification Left, 26th Aug., 1896-Accepted, 17th Oct., 1896
PROVISIONAL SPECIFICATION.
A New or Improved Ventilating Apparatus.
I, DAVID REES of Cape Stores, Fforestfach, near Swansea, Mechanic, do
hereby declare the nature of this invention to be as follows:-
This invention relates to an improved ventilating device suitable for use with
chimneys, on board ship and for other purposes, and bas for its object to provide
a simple and inexpensive arrangement which will produce a good draught.
In carrying out my invention, I fit on top of the chimney or ventilating pipe a
tubular head adapted to turn in any required direction being furnished with a
pivot supported in a bearing on top of the pipe, and a wing piece or plate to cause.
the head to turn in the proper direction. For use in railway carriages or on board.
ship other arrangements may be used to adjusting the head.
The ventilator is closed at the top and opens at the side or front, a short
extension projecting at this side. A cross tube is furnished concentric with the
aperture and of conical form, the large end opening at the back of the ventilator.
The smaller end extends to the front opening immediately behind the outlet. The
smoke or air passing through the chimney or ventilating pipe thus passes out at
the front around the cross tube through which the ventilating current flows..
Owing to the draught being central an effective ventilation is ensured.
Dated this 15th day of January 1896.
GEO. H. RAYNER,
37, Chancery Lane, London, Agent for the Applicant..
I, DAVID REES of Cape Stores, Fforestfach, near Swansea, Mechanic, 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 :-
This invention relates to an improved ventilating device suitable for use on
chimneys, on board ship, on railway carriages and elsewhere, and has for its
object to provide a simple and inexpensive arrangement which will produce a good
draught.
In carrying out my invention, 1 fit on top of the chimney or ventilating pipe a
tubular head adapted to turn freely and furnished with a pivot supported in a.
bearing on top of the chimney or pipe and with a wing piece or plate to cause the
head to turn in the proper direction. For use on railway carriages or on board
ship, other arrangements may be used for adjusting the head.
The ventilator is closed at the top and opens at the side or front, a short
extension projecting at this side. A cross tube is furnished concentric with the
aperture and of conical form, the large end opening at the back of the ventilator.
The smaller end extends to the front opening immediately behind the outlet.
The invention will be readily understood by reference to the accompanying
drawings in which Fig. 1 is a vertical section showing the improved device applied.

page_text: to a chimney or ventilating pipe. Fig. 2 is also a vertical central section but at
right angles to that shown in Fig. 1.
a is the chimney or ventilating pipe and 6 is the head, whose pivot e fits in the
tubular bearing or socket d which is supported centrally in the pipe by radial
arms e as is also the pivot e suitable means being provided for lubricating the
said pivot.
fis the wing piece which causes the head to turn and to set itself always in the
proper direction to the wind. g is the short lateral extension which forms the
opening of the ventilator, and is the conical or tapering cross-tube above referred
to which it will be seen is concentric with the said extension. It is secured at its
larger end directly to the side or wall of the ventilating device and it tapers to the
part near its other end where it is provided with a flaring or trumpet mouth 2.
At its narrowest part h¹ its cross sectional area is one quarter that at the large end.
It will be seen that the said larger end is always kept towards the wind by the
action of the vane i as a flange formed around the bead where it meets the top of
the chimney or ventilating pipe.
The device as will be readily understood works on the injector principle, and
its efficiency is greatly increased owing to the pronounced taper of the tube h, and
also owing to its concentric arrangement and to the trumpet mouth with which it
is provided. As the wind blows through this tube it is discharged from the narrow
end thereof with a greatly increased velocity owing to the diminution of cross
sectional area, and it causes the smoke air or gases to be drawn up the tube a and
discharged from the open mouth of the extension g.
Instead of the pivot e and socket d ball bearings may in some cases be
employed.
Having now particularly described and ascertained the nature of my said
invention and what manner the same is to be performed, I declare that what I
claim is :-
1. A ventilating apparatus provided with a lateral extension and a tapering
cross-tube concentric with such extension secured directly to the side or wall
thereof, this cross-tube having a trumpet mouth, substantially as described and for
the purposes specified.
2. The combination with a chimney or ventilating pipe, of a rotary head b
having a pivot c fitting in a tubular socket d and has a lateral extension g concentric
with which is a tapering trumpet-ended tube / substantially as described with
reference to the accompanying drawings.
Dated this 20th day of August 1896
GEO. H. RAYNER,
37, Chancery Lane, London, Agent for the Applicant.