IMPROVEMENTS IN VENTILATING APPARATUS to be as follows:-
Year: 1885

page_text: We, GEORGE HARRIS HAYWOOD, of Rotherham in the County of York, Manu-
facturer, and GEORGE WILLIAMS, of Aldershot, Surveyor do hereby declare the
nature of our invention for "IMPROVEMENTS IN VENTILATING APPARATUS to be
as follows:-
"
This invention relates to Ventilators ordinarily used for the purpose of venti-
lating rooms or other places by allowing the escape of vitiated air, or for the
admission of pure air without causing draughts, and it has for its object a novel
method of making such Ventilators so that they are very simple, cheap, and durable
and at the same time are easily regulated and adjusted.
Ventilators for the purpose described ordinarily consist of a suitable opening
from the room or place to be ventilated, such opening being provided with inclined
plates or louvre boards turning upon centres at their extremities and connected
together in such manner that they can be turned and adjusted to any desired angle,
so as to be open more or less or to be entirely closed.
The improved ventilator consists of a box or chamber, of cast iron or other
suitable material, open at its front the edge of which is provided with a flange by
which the box can be fixed to a corresponding opening in a suitable part of the
roon or other place which is to be ventilated.
Into the open front of the box is fitted and fixed by screws or other convenient
means a shallow open frame across which are arranged a sufficient number of
transverse inclined plates or louvre boards, arranged at such an angle that any
current of air passing between them is turned in a corresponding direction in the
usual way.
These inclined plates are rigidly formed upon or fixed to the open frame which
carries them, and in order to regulate and adjust the quantity of air passing
through them and the consequent extent of ventilation desired from time to time,
a transverse opening is made at the back of the outer box first described, and to
this opening is fitted a moveable transverse plate preferably of metal which turns
upon horizontal pivots at the front edge of its ends in such manner that when it is
allowed to lie flat the opening at the back of the box is open to its full extent,
but when it is raised upon its pivots it closes the opening, its back edge preferably
projecting through the latter and coming, when raised, in contact with the upper
edge of the opening.

page_text: In order that the moveable plate may be simply and readily adjusted so as to
turn freely upon its pivots, the ends of the box are preferably made of somewhat
greater thickness in the part over which the ends of the plate pass when moving,
that is to say from the upper edge of the back opening to the point where the
pivot is to work, where a notch is cast or formed in such extra thickness, the
pivots being introduced into these two end notches before the open frame with
the inclined plates is inserted into its place. The edge of the inner ends of this
open frame are also provided with notches corresponding with those first described,
so that when the open frame is fitted and fixed in its place the several notches
form bearings in which the pivots turn freely.
To the moveable plate arranged as described is attached a lever passing up and
forward between two of the inclined plates, one of which may be notched or
perforated to allow its passage, and to the end of this lever is attached a cord, wire,
or handle, by which the moveable plate can be opened or closed or its position
adjusted as desired. The moveable plate may if desired be carefully balanced so
that it closes automatically if any sudden back pressure acts upon it.
By the method of arrangement described it will be seen that an effective
ventilator is obtained in which the inclined plates or louvre boards are perma-
nently fixed and the opening and closing and adjustment are effected by a single
moveable plate, and by the method of construction described, the several parts
of the ventilator are very simple and easily and cheaply made and put together,
whilst they are not liable to get out of order.

page_text: COMPLETE SPECIFICATION,
Improvements in Ventilating Apparatus.
We, GEORGE HARRIS HAYWOOD of Rotherham in the County of York, Manu-
facturer, and GEORGE WILLIAMS, of Aldershot, Surveyor, do hereby declare the
nature of our invention and in what manner the same is to be performed, to be
particularly described and ascertained in and by the following statement and
accompanying drawing, (that is to say):-
This invention relates to ventilators ordinarily used for the purpose of venti-
lating rooms or other places by allowing the escape of vitiated air, or for the
admission of pure air without causing draughts, and it has for its object a novel
method of making such ventilators so that they are very simple, cheap, and durable
and at the same time are easily regulated and adjusted.
Ventilators for the purpose described ordinarily consist of a suitable opening
from the room or place to be ventilated, such opening being provided with inclined
plates or louvre boards turning upon centres at their extremities and connected
together in such manner that they can be turned and adjusted to any desired angle,
so as to be open more or less or to be entirely closed.
The accompanying drawing is in illustration of the present invention. Figure 1
being a front view of a ventilator, figure 2 a transverse section and figure 3 a
horizontal section of the same. Figure 4 is a view of the ventilator upon a smaller
scale.
The improved ventilator consists of a box or chamber a, of cast iron or other
suitable material, open at its front the edge of which is provided with a flange b by
which the box can be fixed to a corresponding opening in a suitable part of the
room or other place which is to be ventilated, as shewn in figure 3.
Into the open front of the box a is fitted and fixed by screws or other convenient
means a shallow open frame c across which are arranged a sufficient number of
transverse inclined plates or louvre boards d, d, d, arranged at such an angle that
any current of air pussing between them is diverted in a corresponding direction
in the usual way.
These inclined plates d are rigidly formed upon or fixed to the open frame c
which carries them, and in order to regulate and adjust the quantity of air passing
through them and the consequent extent of ventilation desired from time to time,
a transverse opening e (figure 2) is made at the back of the outer box a first
described, and to this opening is fitted a moveable transverse plate f preferably of
metal which turns upon horizontal pivots g, g, at the front edge of its ends in such
manner that when it is allowed to lie flat (as shewn in figures 2 and 3) the opening e
at the back of the box is open to its full extent, but when it is raised upon its
pivots (as shewn in dotted lines at figure 2) it closes the opening, its back edge
preferably projecting through the latter and coming, when raised, in contact with
the upper edge of the opening.
In order that the moveable plate ƒ may be simply and readily adjusted and fitted
in its place so as to turn freely upon its pivots, the ends of the box are preferably
made of somewhat greater thickness in the part h over which the ends of the
plate pass when moving, that is to say from the upper edge of the back opening e

page_text: to the point where the pivot g is to work, where a notch is cast or formed in such
extra thickness, the pivots g, g, being introduced into these two end notches
before the open frame c with the inclined plate is inserted into its place. The
edges of the inner ends of this open frame c are also provided with notches or
recesses corresponding with those first described in h, so that when the open
frame c is fitted and fixed in its place the several notches form bearings in which
the pivots g, g, turn freely. The recesses i may be continued for the entire length
of the frame c.
To the moveable plate arranged as described is attached a lever / passing
up and forward between two of the inclined plates d, d, one of which may be
notched or perforated as shewn to allow its passage, and to the end of this lever k
is attached a cord, chain, wire, or handle by which the moveable plate f can be
opened or closed or its position adjusted as desired.
The moveable plate ƒ may if desired be carefully balanced so that it closes
automatically if any sudden back pressure acts upon it.
By the method of arrangement described it will be seen that an effective
ventilator is obtained in which the inclined plates or louvre boards are perma-
nently fixed and the opening and closing and adjustment are effected by a single
moveable plate, and by the method of construction described, the several parts of the
Ventilator are very simple and easily and cheaply made, and put together, whilst
they are not liable to get out of order.
Any desired number of the inclined plates may be used, and the apparatus may
be made of any size and shape to suit the conditions under which it is to be used.
We do not claim the precise form and method of arrangement of the several
parts of the apparatus, which may be varied more or less to suit varying circum-
stances, but 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 :-
1. The method of construction of ventilating apparatus, consisting of the fixed
inclined plates or boards in combination with a box or chamber having an opening
provided with a moveable adjustable door, substantially as described and shewn
in the drawing.
2. Also, the combination of the box or chamber a having notched sides h, the
open frame c having fixed inclined plates or boards d and notches i, and the
moveable platef having pivots turning in the notches, substantially as and for
the purpose described and shewn,
Th
CM1 1006