IMPROVEMENTS IN REGULATING THE VENTILATION OF BUILDINGS
Year: 1844

page_text: TO ALL TO WHOM THESE PRESENTS SHALL COME, I, BENJAMIN
BAILLIE, of Henry Street, in the County of Middlesex, Glazier, &c., send
greeting.
WHEREAS Her present most Excellent Majesty Queen Victoria, by Her
Letters Patent under the Great Seal of Great Britain, bearing date at
Westminster, the Twenty-fifth day of November, in the eighth year of Her
reign, did, for Herself, Her heirs and successors, give and grant unto me, the
said Benjamin Baillie, Her especial licence, full power, sole privilege and
authority, that I, the said Benjamin Baillie, my exors, adiñňors, and assigns,
or such others as I, the said Benjamin Baillie, my exors, admors, or assigns,
should at any time agree with, and no others, froin time to time and at all
times during the term of years therein expressed, should and lawfully might
make, use, exercise, and vend, within England, Wales, and the Town of
Berwick-upon-Tweed, my Invention of "IMPROVEMENTS IN REGULATING THE
VENTILATION OF BUILDINGS;" in which said Letters Patent is contained a pro-
viso that I, the said Benjamin Baillie, shall cause a particular description of
the nature of my said Invention, and in what manner the same is to be per-
formed, to be inrolled in Her said Majesty's High Court of Chancery within
six calendar months next and immediately after the date of the said in part
recited Letters Patent, as in and by the same, reference being thereunto had,
will more fully and at large appear.
NOW KNOW YE, that in compliance with the said proviso, I, the said
Benjamin Baillie, do hereby declare that the nature of my Invention, and

page_text: the manner in which the same is to be performed, are fully described and
ascertained in and by the following statement thereof, reference being had to
the Drawings hereunto annexed, and to the figures and letters marked
thereon, that is to say:-
My Invention consists of arranging narrow plates of glass as fixed louvres
in suitable frames, to be introduced into window sashes, and combining there-
with sliding or other opening or closing plates of glass in such manner that
when desired the openings between the fixed glass louvres may be closed or
partly so, so as for the time being to prevent or partially prevent the passage
of air, and yet allow of light passing through the apparatus.
And in order that my Invention may be most fully understood, and readily
carried into effect, I will proceed to describe the means pursued by me.
DESCRIPTION OF THE DRAWINGS.
A, an elevation and a vertical section of a sash window, with the ventilator
fixed in the position which experience has proved to be the best for avoiding
draughts; a, a, the fixed inclined glass louvres; b, c, the slide valve of glass
for regulating the quantity of air admitted, which is moved by the cords (d, e),
coinciding with and hidden by the sash bars, and passing over pulleys, as at
(f, g, h, j), to any required position. In the sketch the cord is shown as
passed over a rack pulley n, in the same way as in ordinary roller blinds; but
when it is required frequently to pull down the top sash itself, the cord had
better be furnished at its lower end with a balance weight instead of passing
over a rack pulley. k, an eye screwed into the sash bead through which the
cord runs; l, m, connecting sockets which serve both to unite the cords, as
shewn, and also to stop, by means of the eye k, the slide valve from being
drawn too far or let down too violently. The slide valve may, however, be
lifted out by hand for cleaning or any other purpose. B, in this Figure, the
ventilation is shewn to be fixed in one of the topmost panes, in which case the
slide valve is lowered instead of raised. C, the mode of adapting the slide
valve to the sashes of basement, attic, or other windows where the top panes
can be easily reached by the hand.
Having thus described the nature of my Invention, and the means of
performing the same, I would remark, that I am aware that moveable glass
louvres have before been used for, the purpose of ventilation. I do not,
therefore, claim the use of glass louvres generally; and I would state, that
I do not confine myself to the details shown and described, so long as the
peculiar character of the apparatus be retained. But what I claim is, the
mode herein described of combining glass into apparatus for the purposes of

page_text: Enrolled the Twenty-fourth day of May, in the year of our Lord One
thousand eight hundred and forty-five.