An Improved Ventilator to Act either as Inlet for Fresh Air or Outlet for Foul Air.
Year: 1889

page_text: Date of Application, 11th July, 1889
Complete Specification Left, 10th May, 1890-Accepted, 21st June, 1890
PROVISIONAL SPECIFICATION.
An Improved Ventilator to Act either as Inlet for Fresh Air or
Outlet for Foul Air.
HENRY THOMAS JOHNSON and THOS. SILK WILSON, both of St. Andrew's Chambers
Albert Square Manchester, Surveyors do hereby declare the nature of this invention
to be as follows :-
The object of our Invention is to provide a ventilator that will be of general use
and act either as an inlet for the admission of fresh air or as an outlet for the extraction
of foul air according to the positions in which the ventilator is placed.
This we accomplish by means of a moveable valve or short tube hinged to a wall
box as illustrated. The drawing shews a cross section of the ventilator, together with
an outer air grating the ventilator is shewn open as an air inlet into a room, and closed
as represented by the dotted lines. J represents the wall. A A is a wall box or frame
to which is hinged at the bottom the valve or inner short tube, which falls at an angle
into the room.
The front plate B and the back plate Care connected by the ends D
to form the tube or valve, the bottom of the tube at H may be either open for the
admission of air or may be fitted with perforated metal gauze or coarse canvas to act
as an air filter. The valve is prevented from falling too far forward by means of the
upper edge of back plate C coming in contact with a flange E on the frame A.
The wall box A with the moveable valve is fitted on the interior or inner front of
an aperture in the wall J whilst on the outer side of the aperture another frame or air
grating G is fixed having an inner midfeather F. The midfeather F and the back
plate act as checks to the force of the wind and by their relative position prevent
the wind blowing direct through and give it an indirect course into the room as
indicated by the arrows.
The ventilator as an air inlet will be fixed in the lower part of the room preferably
about 5 or 6 ft. from the floor, an ordinary air grating may also be used instead of the
one G. F. in which case their will be only one check by the plate C to the inflowing
force of the wind.
The ventilator as an outlet will be fixed in the upper part of the room immediately
or nearly under the ceiling line and give exit for the vitiated air, either direct through
an aperture in the outer wall in which the ventilator will be fixed, or to discharge into
any spare flue or smoke flue or ventilating shaft.
The outer air grating G may be also used with the outlet as a check to back
draughts by means of the inner plate F, or an ordinary air grating may be used, or
the ventilator may be used as an outlet in conjunction with other appliances such as
an exhaust cowl on the outside of the wall or with any appliance fitted into a smoke
flue to prevent back flow of smoke or soot.
The valve may be opened and closed by means of a cord and pulley attached to the
ventilator.
COMPLETE SPECIFICATION.
An Improved Ventilator to Act either as Inlet for Fresh Air or
Outlet for Foul Air.
HENRY THOMAS JOHNSON and THOMAS SILK WILSON both of Albert Square
Manchester Surveyors 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 :-
The object of our Invention is to provide a ventilator that will be of general use

page_text: and act either as an inlet for the admission of fresh air, or as an outlet for the
extraction of foul air according to the positions in which the ventilator is fixed.
This we accomplish by means of a moveable valve or short tube hinged to a wall
box as illustrated in drawings left with provisional specification. The drawing shews
a cross section of the ventilator, together with an outer air grating. The ventilator is
shewn open as an air inlet into a room, and closed as represented by the dotted lines.
J represents the wall. A. A is a wall box or frame to which is hinged at the bottom
the valve or inner short tube, which falls at an angle into the room. The front plate B
and the back plate C are connected by the ends D to form the tube or valve. the
bottom of the tube at H may be either open for the admission of air or may be fitted
.with perforated metal gauze or course canvas to act as an air filter. The valve is
prevented from falling too far forward by means of the upper edge of back plate C
coming in contact with a flange E on the frame A.
The wall box A with the moveable valve is fitted on the interior or inner front of
air aperture in the wall J whilst on the outer side of the aperture another frame or
air grating G is fixed having an inner midfeather F. The midfeather F and the back
plate Cact a checks to the force of the wind and by their relative position prevent the
wind blowing direct through and give it an indirect course into the room as indicated
by the arrows.
The ventilator as an air inlet will be fixed in the lower part of the room preferably
about 5 or 6 ft. from the floor, an ordinary air grating may also be used instead of the
one G. F, in which case there will be only one check by the plate to the inflowing
force of the wind.
The ventilator as an outlet will be fixed in the upper part of the room immediately
or nearly under the ceiling line and give exit for the vitiated air either direct through
an aperture in the outer wall in which the ventilator will be fixed, or to discharge into
any spare flue or smoke flue or ventilating shaft.
The outer air grating G may be also used with the outlet as a check to back
draughts by means of the inner plate F or an ordinary air grating may be used, or
the ventilator may be used as an outlet in conjunction with other appliances such as
an exhaust cowl on the outside of the wall, or with any appliance fitted into a smoke
flue to prevent back flow of smoke or soot.
The valve may be opened and closed by means of a cord and pulley attached to the
ventilator..
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 substantially as set forth.
First. A ventilator with hinged front which when open forms a small tube for
directing air in an upward current into the room, when at a suitable height for the
supply of air, or
Second. A ventilator with hinged front to fix in upper part of room to exhaust
. foul air.
Dated this 10th day of Anril 1800
HENRY THOMAS JOHNSON.
THOMAS SILK WILSON.
Per pro William Edward Wilson.