IMPROVEMENTS IN VENTILATING APPARATUS
Year: 1861

page_text: LETTERS PATENT to Stephen Wenton, of Lower Rosoman Street, Clerken-
well, in the County of Middlesex, for the Invention of "IMPROVEMENTS IN
VENTILATING APPARATUS."
Sealed the 30th August 1861, and dated the 26th June 1861..
PROVISIONAL SPECIFICATION left by the said Stephen Wenton at the
Office of the Commissioners of Patents, with his Petition, on the 26th
June 1861.
I, STEPHEN WENTON, of Lower Rosoman Street, Clerkenwell, in the County.
of Middlesex, do hereby declare the nature of the Invention for "IMPROVE-
MENTS IN VENTILATING APPARATUS," to be as follows:-
This Invention has for its object improvements in the arrangement and
construction of apparatus employed for ventilating apartments, public build-
ings, hot or greenhouses, carriages, or other places requiring ventilation or a
free circulation between the internal and external air, and my Invention
relates particularly to the mode of arranging and giving motion to a series of
what are technically termed louvre or buffer boards or flat strips or pieces of
wood, metal, glass, or other suitable material enclosed in a frame, and capable

page_text: of being placed at any angle, so as to be capable of opening or closing the
aperture in which they are placed to any extent desired.
For the purpose of carrying out my Invention, I prefer to arrange a series
of louvres or strips of wood, glass, metal, or other suitable material in a frame,
either vertically or horizontally. One end of each of such louvres or strips has
a central pin or axis formed thereon or attached thereto, and capable of turning
freely in one side of such frame, the other end of each louvre has two pins or
projections formed thereon or attached thereto; these pins enter into holes
formed in two parallel bars, which are connected by pins or otherwise to one
or more toothed pinions supported on axes carried by the frame. A toothed
rack formed on a rod capable of sliding to and fro is employed to give motion
to the toothed pinions, by which each louvre. may be caused to make half a
revolution on its axis, so as to place them at any angle, in order to conduct
the air in any desired direction.
The mechanism for giving motion to and causing the louvres or strips to
rotate on their axes, to the extent previously described, may be greatly varied,
as, for instance, the axis of each louvre may have a toothed, pinion fixed
thereon for a sliding toothed rack to act upon, or an endless chain may be
employed for this purpose, my Invention having for its object the means of
giving a more extended range of movement to. a series of louvres. for
ventilating purposes than has heretofore been obtained; and one part of my
improvements consists in bevilling the edges of each louvre, so that when the
ventilator is closed, and the bevilled edges come together, they present one
uniform level surface in place of overlapping, as heretofore constructed.
SPECIFICATION in pursuance of the conditions of the Letters Patent, filed 2
by the said Stephen Wenton in the Great Seal Patent Office on the
26th December 1861.
TO ALL TO WHOM THESE PRESENTS SHALL COME, I, STEPHEN
WENTON, of Lower Rosomond Street, Clerkenwell, in the County of Middlesex,
send greeting.
WHEREAS Her most Excellent Majesty Queen Victoria, by Her Letter's
Patent, bearing date the Twenty-sixth day of June, in the year of our Lord
One thousand eight hundred and sixty-one, in the twenty-fifth year of Her
reign, did, for Herself, Her heirs and successors, give and grant; unto me, the

page_text: said Stephen Wenton, Her special licence that I, the said Stephen Wenton, my
executors, administrators, and assigns, or such others as I, the said Stephen
Wenton, 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 "IMPROVEMENTS IN VENTILATING
APPARATUS," upon the condition (amongst others) that I, the said Stephen
Wenton, 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 Stephen Wenton, do hereby declare the
nature of the 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, that is to say:-
This Invention has for its object improvements in the arrangement and
construction of apparatus employed for ventilating apartments, public build-
ings, hot or greenhouses, carriages, or other places requiring ventilation or a
free circulation between the internal and external air; and my Invention
relates particularly to the mode of arranging and giving motion to a series of
what are technically termed louvre or buffer boards or flat strips or pieces of
wood, metal, glass, or other suitable material enclosed in a frame, and capable
of being placed at any angle, so as to be capable of opening or closing the
aperture in which they are placed to any extent desired.
.
For the purpose of carrying out my Invention, I prefer to arrange a series
of louvres or strips of wood, glass, metal, or other suitable material in a frame
either vertically or horizontally. One end of each of such louvres or strips
has a central pin or axis formed thereon or attached thereto, and capable of
turning freely in one side of such frame, the other end of each louvre has two
pins or projections formed thereon or attached thereto; these pins enter into
holes formed in two parallel bars, which are connected by pins or otherwise to
one or more toothed pinions, supported on axes carried by the frame. A
toothed rack formed on a rod, capable of sliding to and fro is employed to give
motion to the toothed pinions, by which each louvre may be caused to make

page_text: half a revolution on its axis, so as to place them at any angle, in order to
conduct the air in any desired direction, and one part of my improvements
consists in bevilling the edges of each louvre, so that when the ventilator is
closed and the bevilled edges come together, they present one uniform level
surface in place of overlapping, as heretofore constructed.
And in order that my Invention may be most fully understood and
readily carried into practice, I will proceed to describe the Drawing hereunto
Figure 3 shews separate views of one of the louvres of ventilating apparatus
arranged and constructed according to my Invention, and suitable for being
fixed in a window or aperture for the purpose of ventilating apartments, public
or other buildings, hot or greenhouses, or other places requiring ventilation.
a, a, are a series of louvres or strips (which may be made of wood, glass, metal,
or other suitable material,) mounted and arranged in the frame a', a¹, in a
horizontal position, as shewn. One end of each louvre a has a central pin or
axis at a formed thereon, which is let into and is capable of turning freely in
one side of the frame a¹. The other end of each louvre a has two pins or
projections a³, a³, formed thereon or attached thereto. These pins enter into
holes formed to receive them in the two parallel bars b, 61, one of the two
pins a on each louvre being connected with the bar b, and the other with the
bar b'. The bars b, 6' are connected by pins to opposite sides of the discs c
forming part of the toothed pinions c', which turn on axes carried by the
frame a'. d is a rod, having racks or teeth formed thereon, which take into
the teeth of the pinions c. To the rod d pins or projections d', d³, are affixed
which pass through holes in the sliding rod e, by which an up-and-down motion
may be given to the rod d, to actuate the pinions c¹, thus causing the bars b, b',
to which the louvres a, a, are attached, to recede from or approach each other,
similar to the action of a parallel ruler, so as to open or close the louvres, or
to place them at any desired angle, for the purpose of regulating or directing
the draught passing through the same. The mechanism for giving motion to
and causing the louvres or strips a, a, to rotate on their axes to the extent
previously described, so as to place and retain them at any desired angle, may
be greatly varied, as, for instance, the axis of each louvre may have a toothed
pinion fixed thereon for a sliding toothed rack to act upon, or an endless band

page_text: or chain may be employed for this purpose, my Invention having for its object
the means of giving a more extended range of movement to a series of louvres
for ventilating purposes than has heretofore been obtained to ventilating
apparatus of this description.
In witness whereof, I, the said Stephen Wenton, have hereunto set
my hand and seal, this Twenty-sixth day of December, in the year of
our Lord One thousand eight hundred and sixty-one.
Witness,
G. H. BIRKBECK,
Patent Agent,
34, Southampton Bldgs.,
Chancery Lane.
STEPHEN WENTON. (L.s.)