IMPROVED APPARATUS FOR VENTILATING SHIPS, TUNNELS, MINES, ROOMS, & OTHER PLACES
Year: 1885

page_text: Rooms, and other Places.
ROBERT GREGORY of 27 Chalfont Road Islington in the County of Middlesex
and HENRY HARRIS of 11 Clarence Street Clapham in the County of Surrey
Engineers do hereby declare the nature of their invention for IMPROVED
APPARATUS FOR VENTILATING SHIPS, TUNNELS, MINES, ROOMS, & OTHER PLACES
to be as follows:-
Improvements in the method of and in our apparatus of "Air Injector" for the
ventilation of Boilar Engine rooms, Coal Bunkers of Ships Coal & other Mines
Railway & other tunnels, passages, and all places and purposes where the vitiated
air, smoke steam gas & dust, exist and which requires artificial means to be drawn
out, and a free circulation of fresh air to be brought in.
The object of our improvements is to provide efficient means of ventilating the
Boilar & Engine rooms & Coal bunkers of Ships, "Mines, tunnels generally and
passages and all places which require artificial means of ventilation.
In the following description the word "tunnel" is intended to include all other
places to which this invention is applicable.
We place in the upper part of the tunnel & fixed or suspended at or near to the
crown of the arch a square Injector box or of any other shape, or tubes cf a
rectangular, circular elliptical, or other sectional form.
These boxes or tubes are placed parellel to the longitudinal section of the room or
tunnel & are perforated at intervals with holes to admit the vitiated air thereto.
These holes are fitted internally with funnels or portions of funnels so formed as
to direct the incoming currents in one direction.
One end of the tube is closed to the tunnel & has the nozzle of a pipe leading
from a rotary fan or other blower fitted thereto.
The blowers are placed in any convenient position but preferably as near to the
tubes as convenient & are worked by steam or other motive power.
The current of air is driven longitudinally into the tube through the nozzle at
considerable velocity.
The issuing current of air induces a current in the same direction within the
box or tube which induced currents draws into the tube the vitiated air, smoke,

page_text: steam, gas, & dust, existing in the tunnel and the same is driven in the direction
of the induced current and mixed therewith, is carried away to the end of the
tube farthest from the air nozzle. The exit end of the tube is carried above ground
to a chimney or other suitable termination for disposing of the outgoing air,
and in the case of Ships the end of chimney or shaft would be fitted with a
Sra Cowl, of ordinary construction which would allow of the inlet of pure air, &
the outlet of foul air, and yet prévent the shipping of water in the roughest weather
I only use this Cowl in combination with my apparatus.
The length of one tube is suited to the ordinary state of the room, or tunnel &
the amount of ventilation required Long rooms or tunnels or Mines require a
number of lengths of such boxes or tubes and a separate blower is fitted to each.
We sometimes place two such tubes end to end in a tunnel and place two fans
over the mid length of the tunnel & in communication the internal ends of
such tubes, the outer ends of the tubes terminating at the two outer ends of the
tunnel.
TL
.
T

page_text: Improved Apparatus for Ventilating Ships, Tunnels, Mines,
Rooms, and other Places.
We ROBERT GREGORY, and HENRY HARRIS, both of number 27 Chalfont Road,
Islington in the County of Middlesex, Engineers do hereby declare the nature
of our invention for IMPROVED APPARATUS FOR VENTILATING SHIPS, TUNNELS,
MINES, ROOMS AND OTHER PLACES and in what manner the same is to be
performed, to be particularly described and ascertained in and by the following
statement:-
The object of our Invention is to ensure, by means of the devices hereinafter
described, thorough and efficient ventilation in all cases where it is necessary to
have recourse to artificial ventilating contrivances.
We have selected for one illustration of our said Invention the application of.
same to the ventilation of tunnels; and, with the object of rendering the description
of our said Invention as so applied, the more readily understood, we have appended
the accompanying sheet of drawings in which the same letters of reference are
employed to denote like or corresponding parts in each of the views.
in carrying out our said Invention, (in the case of its application for the purpose
last mentioned) we place in the upper part of the tunnel A and fixed or suspended
at or near to the crown of the arch thereof, one or more perforated channels,
troughs, or tubes of any suitable shape in transverse section and arranged parallel
with the longitudinal axis of the tunnel. The vitiated air is admitted into said
channels, troughs or tubes, through the perforations C, which latter are covered in
the interior of said tube or channel B, with louvres D disposed so as to direct the
incoming currents of air in one direction as indicated by arrows at a a¹. One end
of the channel, trough, or tube B, is closed to the tunnel A and has fitted thereto
the nozzle of a pipe E, leading from a suitable blower or from suitable blowers,
which latter are placed in any convenient position and worked by steam or other
motive power. The direction of the current from said blower or blowers is indicated
by the arrows b b¹. Said current of air is driven longitudinally into the trough,
tube, or channel B aforesaid, through the nozzle above mentioned at considerable
velocity. The issuing current of air induces a current in the same direction within
the trough B, which induced current draws into said channel the vitiated air,
smoke, steam, gas, and dust existing in the tunnel, and said vitiated contents are
induced in the direction of the forced current issuing from the nozzle of the pipe E,
as indicated by the arrows a a¹ and mixed there with, and carried away to the end
of the channel, tube or trough B farthest from the nozzle of the pipe E at which
point it is fitted with and carried above to a chimney c or other suitable outlet to
allow of the dispersion of the 'vitiated air removed from the tunnel. When the
channel B aforesaid is fixed in the engine rooms, or coal bunkers of ships, the outlets
of the channel B would be fitted with an ordinary sea cowl which would allow of
the inlet of pure air, and the outlet of foul air, and yet prevent the shipping of
water in the roughest weather. The number and dimensions of the troughs,
channels, or tubes B aforesaid will, as can be readily understood be proportionate

page_text: and adapted to meet the ventilating requirements in each particular case; said
troughs tubes or channels being made in lengths, portions, or divisions, which may
be readily coupled up together.
Referring to the illustrations in the accompanying sheet of drawings, Figure 1. is
a horizontal section in perspective of the trough, channel or tube B running
longitudinally in the upper part and centre of the tunnel and broken to shew the
interior of the apparatus. In this view the air is shewn as being forced from
the centre of the tunnel to each end thereof. Figure 2 is a detailed view to an
enlarged scale shewing the perforations hereinbefore referred to and covered with
the internal louvres D.
In some cases we may, instead of using a blowing device or apparatus adopt the
principle of exhaustion; in which latter case we propose to employ an atmospheric
burner which we fix at the bottom of the shaft, chimney, or other outlet; or, in
some cases in the interior of the apparatus box.
Having now particularly described and ascertained the nature of our said
Invention and in what manner the same is to be performed, we declare that what
we claim is
:
Firstly The improved apparatus for ventilating purposes substantially as herein
set forth,
Secondly: In connection with the apparatus referred to in the preceding claim
the louvres D substantially as herein described and as shewn in the accompanying
sheet of drawings.