IMPROVEMENTS IN VENTILATORS FOR WINDOWS AND OTHER LIKE OPENINGS
Year: 1866

page_text: LETTERS PATENT to David Blair White, of the Town and County of the
Town of Newcastle-upon-Tyne, Doctor of Medicine, for the Invention
of "IMPROVEMENTS IN VENTILATORS FOR WINDOWS AND OTHER LIKE
OPENINGS."
Sealed the 24th October 1866, and dated the 27th April 1866.
PROVISIONAL SPECIFICATION left by the said David Blair White at
the Office of the Commissioners of Patents, with his Petition, on the
27th April 1866.
1, DAVID BLAIR WHITE, of the Town and County of the Town of New-
castle-upon-Tyne, Doctor of Medicine, do hereby declare the nature of the
said Invention for "IMPROVEMENTS IN VENTILATORS FOR WINDOWS AND OTHER LIKE
OPENINGS," to be as follows:-
My Invention consists, first, in constructing ventilators of an open fabric or
material, one end of which is secured to a spring roller, while the other end
is fastened to the window sash. On opening the sash the ventilator follows it
if already fastened to it, or the ventilator may be pulled down or up, as the
case may be, to occupy the space between the sash and window frame, and
be fastened to the sash. When the ventilator is not required it winds upon
the spring roller. The position of the spring roller may be reversed, that. is
to say, it may be fitted to the sash.

page_text: My Invention consists, secondly, in constructing ventilators of an open
fabric or material fixed to the upper part of the inner beading of a window
frame so that it lies in the interstice which exists between the inner beading
and the upper sash when this sash is closed, or the ventilator may be fixed
to any other convenient part of the upper part of the window frame. When
the upper sash is lowered the ventilated covers the opening thereby
formed.
My Invention consists, thirdly, in constructing ventilators of a frame of open
fabric or material laid against the window so as to cover the opening of the
window. To the lower part of this frame I hinge another frame of open fabric
or material. This second frame lies at any convenient angle, and is for the
purpose of directing cold dense air up towards the ceiling; it may be removed
if required. Between the two frames I fit two side cheeks not of open fabric
or material, and I cover the space contained within the upper edges of the
frames and cheeks with gauze or other material. I prefer to make the
frames of two thicknesses of gauze or other similar material which gives a
better appearance to the ventilator. To prevent air rushing in or the entrance
of dust between the sashes or between the ventilator and the sash I fit a
strip or narrow apron of india-rubber or similar material across the bottom
of the upper sash or the top of the lower sash, and a similar strip to the
ventilator. The open fabric or material used for my ventilators may have any
ornamental device painted or produced thereon, so as to give a pleasing
appearance thereto. To prevent the upper sash being lowered, or the lower
sash being raised beyond a certain extent, I fit catches at any convenient parts
of the frames, so that in case the ventilator is left open or partly open
during the night the window may not be easily further opened from the
outside
SPECIFICATION in pursuance of the conditions of the Letters Patent, filed
by the said David Blair White in the Great Seal Patent Office on the
27th October 1866.
TO ALL TO WHOM THESE PRESENTS SHALL COME, I, DAVID
BLAIR WHITE, of the Town and County of the Town of Newcastle-upon-Tyne,
Doctor of Medicine, send greeting.
WHEREAS Her most Excellent Majesty Queen Victoria, by Her Letters
Patent, bearing date the Twenty-seventh day of April, in the year of our
Lord One thousand eight hundred and sixty-six, in the twenty-ninth year of
Her reign, did, for Herself, Her heirs and successors, give and grant unto me,

page_text: the said David Blair White, Her special licence that I, the said David
Blair White, my executors, administrators, and assigns, or such others as I,
the said David Blair White, my executors, administrators, and assigns,
should at any time agree with, and no others, from time to time and at all
times thereafter during the term therein expressed. should and lawfully might
make, use, exercise, and vend within the United Kingdom of Great Britain and
Ireland, the Channel Islands, and Isle of Man, an Invention for "IMPROVE
MENTS IN VENTILATORS FOR WINDOWS AND OTHER LIKE OPENINGS," upon the con-
dition (amongst others) that I, the said David Blair White, my executors or
administrators. by an instrument in writing under my, or their, or one of their
hands and seals, should particularly describe and ascertain the nature of the said
Invention, and in what manner the same was to be performed, and cause
the same to be filed in the Great Seal Patent Office within six calendar
months next and immediately after the date of the said Letters Patent.
NOW KNOW YE, that I, the said David Blair White, do hereby
declare the nature of my said invention, and in what manner the same is
to be performed, to be particularly described and ascertained in and by the
following statement thereof, reference being had to the Drawings hereunto
annexed, that is to say :-
My Invention consists, 1st, in constructing ventilators of an open fabric or
material, one end of which is secured to a spring roller fitted in the window
frame, while the other end is fastened to the window sash. On opening the sash
the ventilator follows it if already fastened to it, or the ventilator may be pulled
down or up as the case may be, to occupy the space between the sash and
window frame, and be fastened to the sash. When the ventilator is not
required it winds upon the spring roller; the position of the spring roller
may be reversed, that is to say, it may be fitted to the sash, the other end of
the ventilator being then fastened to the window frame.
Figure 1 of the accompanying Drawings is a front or inside view, and
Figure 2 a side view of a window fitted with a ventilator according to this
part of my Invention.
A is a sheet of gauze or open material secured at the top to a spring
roller D, and fastened at the bottom by screws 8, 8, to a metal plate P on the
upper cross bar C of the upper sash. When the upper sash is opened the
ventilator A follows it, and covers the opening produced. N, N, are projecting
guide frames fixed in the window frame; E is the roller for the ordinary blind.
The ventilator A may be wound up on the roller D by an endless cord instead
of by a spring.
My Invention consists, secondly, in constructing ventilators of open fabric

page_text: or material fixed to the upper part of the inner beading of a window frame
so that it lies in the interstice which exists between the inner beading
and the upper sash when this sash is closed, or the ventilator may be fixed to
any other convenient part of the window frame so that it shall be air-tight
within that frame. When the sash is opened the ventilator covers the opening
thereby formed.
Figure 3 is a front or inside view, and Figure 4 a vertical section showing
a window fitted with a ventilator according to this part of my Invention. A,
A, are two thicknesses (or one thickness) of gauze or open material held in
a fixed or immovable frame B; C is the top of the upper window sash. a is
an opening at the top of the inner thickness of gauze A; b, d, d, are projecting
vertical bars between the two thicknesses of gauze.
Figure 5 represents in vertical section a modified form of fixed ventilator
frame fitted in the window frame; A, A, are two thicknesses of gauze or
open material, the space A* between the tops of which is enclosed by a close
or open material.
My Invention consists, thirdly, in constructing ventilators of a frame of open
fabric or material laid against the window so as to cover the opening of the
window; to the lower part of this frame I hinge another frame of open fabric
or material, this second frame lies at any convenient angle and is for the
purpose of directing cold dense air up towards the ceiling, it may be removed
if required. Between the two frames I fit two side cheeks, not of open
fabric or material, and I sometimes cover the space contained within the
upper edges of the frames and cheeks with gauze or other open material.
Figure 6 is a front or inside view, and Figure 7 a side view of a window
fitted with a ventilator according to this part of my Invention.
A is a frame of open fabric laid against the window so as to cover the
opening caused by the lowering of the upper sash, which is here shewn as
lowered to C; B is another frame of open fabric hinged to the bottom of the
frame A. The frame B may be moved to any convenient angle, as in
Figure 7, to direct the cold air towards the ceiling, or it may be moved up
close against the frame A, as in Figure 6. Between the frames A, B, are
two side cheeks T not of open material, and a top or covering piece of open
material may be used if required. The side cheeks and top covering piece
should be made so as to fold up when the frames A, B, are brought together.
U, V, are cords for acting on the movable frame B. E is the roller for the
ordinary blind.
My Invention further consists in making the frames in the ventilators,
represented in Figures 6 and 7, and ventilators generally of two thicknesses

page_text: of gauze or other similar material, for the purpose of giving a better appear
ance to the ventilators. The meshes of the two thicknesses of gauze should
be of the same size, and the threads of one gauze run parallel with those
of the other. To prevent air rushing in or the entrance of dust between
the sashes or between the ventilator, and the sash in any of the plans before
described. I fit a strip or narrow apron F of india-rubber, fur, or similar
material across the bottom of the upper sash, or the top of the lower sash, and
another strip i to the top C of the upper sash or to the ventilator. The open
fabric or material used for my ventilators may have any ornamental device
painted or produced thereon, so as to give a pleasing appearance thereto. *
To prevent the upper sash being lowered or the lower sash being raised
beyond a certain extent I fit catches at any convenient parts of the frames,
so that in case the ventilator is left open or partly open during the night the
H is a screw or bolt
window may not be further opened from the outside.
fitted into the upper sash to prevent it being lowered further than shown in
the Figures, and R is a hook attached to the bottom of the window frame,
and taking into a catch on the lower sash, as shewn, to prevent this sash being
raised.
Although I have described my ventilators as applied to windows, it is
understood that they are applicable to other like openings.
And having now described the nature of my said Invention, and in what
manner the same is to be performed, I declare that I claim as my "Improve-
ments in Ventilators for Windows and other like Openings,"―
First, constructing ventilators of an open fabric or material secured at one
end to a roller in the frame of the window or other like opening, and
fastened at the other end to the sash, as herein-before described and repre-
sented in Figures 1 and 2 of the accompanying Drawings, or secured at one
end to a roller on the sash, and fastened at the other end to the frame of the
window or other opening, as herein-before described.
Second, constructing ventilators of an open fabric or material fixed to
immovable and air-tight within the frame of the window or other like
opening, as herein-before described and represented in Figures 3, 4, and 5,
so that when the sash is opened the ventilator covers the opening thereby
formed.
Third, constructing ventilators of two frames of open fabric or material,
the first of which is laid against the window or other opening, and the
second is hinged to the first, substantially as and for the purpose herein-
before described and represented in Figures 6 and 7 of the accompanying
Drawings.

page_text: Fourth, constructing ventilators of two thicknesses of gauze or other
similar material, for the purpose of giving a better appearance, as herein-
before described.
In witness whereof, I, the said David Blair White, have hereunto set
my hand and seal, this Twenty-fourth day of October, One thousand
eight hundred and sixty-six.