Year: 1897

page_text: -
but
I, ALFRED HESSELL TILTMAN, F.R.I.B.A., Architect, of 6, John Street, Bedford
Row, London, do hereby declare the nature of this invention to be as follows:-
This invention relates more especially to what are known as inlet ventilators,
that is to say ventilators for admitting fresh air into a room or other space;
it is also applicable to outlet ventilators, that is to say ventilators for allowing foul
air to pass out of a room or space. The chief objects of the invention are to so
construct the ventilator that it can be readily inspected and cleaned while in use,
from both the inside and outside of the room to which it is applied, without the
necessity of taking it to pieces.
For the purposes of this invention the ventilator is constructed and arranged as
follows:-
The body of the ventilator consists of a box or tube of square or other suitable
cross section built into the wall and forming a passage or flue through the same.
This box or tube may be made of any suitable material, but generally
cast iron will be found most suitable and convenient. At one end of this
box, say the end at which the fresh air enters from the external atmosphere, is
hinged a door made as a grating, or otherwise with a number of perforations to
admit of the free entrance of air, but to prevent, as much as possible, the entrance
of foreign bodies. At the other end of the box, that is to say the end at which the
fresh air is delivered into the room or other place to be ventilated, is hinged the
regulating inlet flap which is provided with side wings in the usual way to prevent
the escape of the air sidewise into the room when the flap is open, and to cause the
air to be delivered upwards. The flap is hinged at its lower edge either directly to
the end of the box or to a frame formed with or secured thereto, and is itself
preferably formed as a frame containing a sheet of glass through which the interior
of the box can be seen. The flap is preferably so hinged that it can be readily
removed from the end of the box and replaced when required. This may be con-
veniently effected by arranging the hinge pin at one side of the flap so that it will
take into a hole in a lug or other part of the end of the box or of the frame secured
thereto, the hinge pin at the other side taking into a hole or recess in another lug
or other part of the end of the box or of the frame secured thereto and retained in
place by a clamping piece and clamping sorew, or otherwise as may be convenient.
It will now he understood that the sheet of glass forming part of the regulating
flap enables the interior of the box or tube to be inspected from the inside of the
room into which it opens, so that the presence of dust or other dirt or foreign
substances can be at once detected; and that by removing the flap from its hinges
such dust and so forth can be readily removed from the inner end of the box or
tube. Similarly by opening the grated or perforated door at the outer end of the
box or tube the dust, and so forth, can be removed from that end without inter-
fering with the regulating flap at the other end.
The internal surface of the box or tube is preferably painted white or finished
with white enamel to show the dust or dirt more readily.

page_text: Ventilators constructed with the above described improvements are specially
suitable for hospitals, schools, workhouses and other public and parochial
establishments.
A. H, TILTMAN,
Per W. H. Beck,
115, Cannon Street, London, E.C., Agent.
I; ALFRED HESSELL TILTMAN, F.R.I.B.A., Architect, of 6, John Street, Bedford
Row, London, 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 relatos more especially to what are known as inlet ventilators,
that is to say ventilators for admitting fresh air into a room or other space; but
it is also applicable to outlet ventilators, that is to say ventilators for allowing foul
air to pass out of a room or space. The chief objects of the invention are to so
construct the ventilator that it can be readily inspected and cleaned while in use,
from both the inside and outside of the room to which it is applied, without the
necessity of taking it to pieces.
For the purposes of this invention the ventilator is constructed and arranged in
the manner illustrated in the accompanying sheet of drawings, in which Figure 1
is a vertical section, and Figure 2 an elevation, looking from right to left in
Figure 1, of one of my improved ventilators arranged for the inlet of fresh air
into a room or other space.
The body of the ventilator consists of a box or tube A of square, oblong or other
suitable cross section built into the wall B and forming a passage or flue through
the same.
This box or tube may be made of any suitable minterial, but generally
cast iron will be found most suitable and convenient. To one end of this box, say
the end at which the fresh air enters from the external atmosphere, is hinged, or
otherwise suitably attached, a door C made as a grating, or otherwise with a number
of perforations, to admit of the free entrance of air, but to prevent, as much as
possible, the entrance of foreign bodies. At the other end of the box, that is to say
the end at which the fresh air is delivered into the room or other place to be
ventilated, is hinged the regulating inlet flap D which is provided with side
wings E in the usual way to prevent the escape of the air sidewise into the room
when the flap is open, and to cause the air to be delivered upwards. The flap D
is hinged at its lower edge, as at F for example, either directly to the end of the
box A or to a frame G formed with or secured thereto, and is itself preferably
formed as a frame containing a sheet of glass, or other suitable transparent
material H, through which the interior of the box can be seen.
The flap is pre-
ferably so hinged that it can be readily removed from the end of the box and
replaced when required. This may be conveniently effected by arranging the
hinge pin I at the side of the flap so that it will take into a hole J in a lug or
other part of the end of the box, or of the frame G secured thereto, the hinge pin I 4
at the other side taking into a recess J' in the end of the box or of the frame G
secured thereto and retained in place by a hinged clamping piece K and clamping
screw K¹, or otherwise as may be convenient.
It will now be understood that the sheet of glass H or other transparent material
forming part of the regulating flap D enables the interior of the box or tube A 5

page_text: to be inspected from the inside of the room into which it opens, so that the pre-
sence of dust or other dirt or foreign substances can be at once detected; and that
by removing the flap from its hinges such dust, and so forth, can be readily
removed from the inner end of the box or tube. Similarly by opening the grated
or perforated door C at the outer end of the box or tube the dust, and so forth, can
be removed from that end without interfering with the regulating flap D at the
other end.
The internal surface of the box or tube A is preferably painted white or finished
with white enamel to show the dust or dirt more readily.
The regulating flap may be opened and closed in the usual way by means of a
cord L L, fixed to a lug M on the upper part of the flap, one part L of the said
cord being used to draw the flap open, and the other part L', passing over a guide
pulley N, to close it.
Indiarubber pads may be interposed between the flap and the rebate in the
frame G to deaden the sound of closing the flap and indiarubber buffers E' may be
placed on the stop pins Es of the wings E to deaden the sound of opening.
It is obvious that in order to use the ventilator as an outlet for foul air, it is
only necessary to reverse its position, placing the flap D outside and the door C
inside; but in that case if the flap D is exposed to the weather it should be hinged
at the top, so that the opening is at the bottom, or other suitable means may be
employed to prevent the entrance of rain or snow.
In some cases the grated or perforated door C may be replaced by a hinged flap
of mica or other suitable material, or such hinged flap may be used in combination
with the said door.
Ventilators constructed with the above described improvements are specially
suitable for hospitals, schools, workhouses and other public and parochial
establishments.
Having now particularly described and ascertained the nature of the said inven-
tion, and in what manner the same is to be performed, I declare that what I
claim is:
First. The improvement in ventilators which consists in making the regulating
inlet or outlet flap with a transparent part through which the interior of the
ventilator box or tube can be inspected, substantially as described.
Second. In a ventilator the combination of a box or tube intended to pass through
the wall of the room or place to be ventilated, a regulating inlet or outlet flap
hinged to one end of the said box or tube, such flap having a transparent part
through which the interior of the said box or tube can be inspected, and a grated
or perforated door hinged or otherwise attached to the opposite end of the said box
or tube, substantially as described.
Third. Ventilators constructed and arranged substantially as described.
Doted this 27th day of January 1898