An Air Inlet Ventilator to Fit on Sash Windows.
Year: 1889

page_text: Date of Application, 11th July, 1889
Complete Specification Left, 10th May, 1890-Accepted. 28th June, 1890
PROVISIONAL SPECIFICATION.
An Air Inlet Ventilator to Fit on Sash Windows.
HENRY THOMAS JOHNSON and THOMAS SILK WILSON both of St. Andrews
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 ventilating air inlet by which air may be
admitted from the windows without opening them and so prevent the usual breaking
through of walls requisite in the usual tube air inlets.
The ventilator is more particularly described by the drawing in which Fig. 1 is a
part plan and Fig. 2 a cross section at the meeting bars of a sash window
The lower sash A and the upper sash B may have holes A' or B' drilled in either or
both of the sashes, the outer air will flow through the holes and fill the air chamber C.
which is an oblong narrow frame and of shallow depth from the air chamber C. the air
will gradually disperse and flow through the apertures D in the grating E forming
the top of the air chamber C or through a perforated sheet of metal or gauze as a
fitter or as an air diffuser in which latter case the upper part or cover to air chamber
will be a lid to open or close and covering the perforated sheet or gauze.
The air flowing through the holes A¹ B being broken in its direct course by means
of the air chamber C will have a quiet flow into the room and so prevent draught, the
air supply may be regulated or entirely stopped by means of the sliding under plate E¹.
or by closing the lid over the perforated sheet or gauze.
E represents either grating or lid.
E represents either slide to grating E or perforated gauze.
If an ordinary sliding ventilator were placed direct on the sash bars without the
intervention of the air chamber, then a good portion of the sash holes would be covered
and useless, unless cut in uniformity with the apertures in grating.
101
1
COMPLETE SPECIFICATION.
An Air Inlet Ventilator to Fit on Sash Windows.
HENRY THOMAS JOHNSON and THOMAS SILK WILSON both of St. Andrews
Chambers 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 ventilating air inlet, by which air may
be admitted from the windows without opening them and so prevent the usual
breaking through of walls required in the usual form of air inlet ventilators.
The ventilator is more particularly described by the Drawings left with the
Provisional Specification in which Fig. 1 is a part plan and Fig. 2 a cross section at
the meeting bars of a sash window.
The lower sash A and the upper sash B may have holes A¹ & or B¹ drilled in either
or both of the sashes, the outer air will flow through the holes and fill the air
chamber C which is an oblong narrow frame and of shallow depth.
From the air chamber the air will gradually disperse and flows through the
apertures D in the grating E forming the top of the air chamber C or through a
perforated sheet of metal or gauze as a filter, or as an air diffuser in which latter
case the upper part or cover to air chamber will be a lid to open or close, and
covering the perforated sheet or gauze.

page_text: The air flowing through the holes A' B' being broken in its direct course by means
of the air chamber C. will have a quiet flow into the room and so prevent draught,
the air supply may be regulated or entirely stopped by means of the sliding under
plate E or by closing the lid over the perforated sheet or ganze.
E represents either grating or lid.
E represents either slide to grating E or perforated sheet or gauze.
If an ordinary sliding ventilator were placed direct on the sash bars without the
intervention of the air chamber then a good portion of the sash holes would be
covered and useless, unless cut in uniformity with the apertures in the grating.
G reprosents the glass in upper sash.
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 substantially as set forth, viz.
First. A ventilator of box form with sliding grating and air chamber under to fit
on meeting bars of sash windows, prepared to supply air to the ventilator, or
Second. A box form of ventilator as above but with perforated sheet or gauze cover
and lid, to be fitted on sash windows as already described.
HENRY THOMAS JOHNSON.
THOMAS SILK WILSON.
Per pro William Edward Wilson.
HENRY THOMAS JOHNSON.
THOMAS SILK WILSON.
Per pro William Edward Wilson.