Improvements in Ventilators.
Year: 1894

page_text: Date of Application, 20th Dec., 1894
Complete Specification Left, 20th Sept., 1895-Accepted, 2nd Nov., 1895
PROVISIONAL SPECIFICATION.
Improvements in Ventilators.
We, JOHN GREEN and WILLIAM ROWLAND GREEN of Norfolk Works,
Ecclesfield in the County of York, Ironfounders, and HERBERT HAGUE of
Prospect Cottage, The Cross, Ecclesfield aforesaid, Pattern Maker, do hereby
declare the nature of this invention to be as follows:-
The object of our invention is to effect certain improvements in and simplify the
construction of that class of ventilator which is designed for fixing in walls
partitions and the like, and in which a flap with side wings is usually hinged to the
front of the framework which is adapted to be fixed in brickwork, stonework or in
any suitable manner in walls, partitions and the like; the said framework being
generally open or provided with a grating or grid at the back.
In carrying out our said invention we cast or form a rectangular framework or
box to be fixed in the wall or partition, the said box or frame having a front flange
on the apartment side in the usual way, we also employ a flap with radial side
wings, at the junction of which with the flap at the lower end, we form a recess
or notch on each side, the said recesses or notches fitting on upward projections of
the front flange of the frame; the botton edge of the flap fits or rests on two or
more studs or the like projecting outwardly from the face of the lower part of the
front flange of the frame; a cut or chase is formed immediately above the last
mentioned studs, of the full width of the flap, so that when the said flap is drawn out.
it turns on its centre or hinge and its bottom edge fits into the chase, the studs
taking a certain amount of strain off the joint between the winged flap and frame
or box: the upper and outer extremities of the wings are provided with horns or
the like which engage downward projections on the upper part of the frame-flange,
and so limit the play of the winged flap.
To stop the winged flap in any desired position we employ a spring fixed to the
side of the frame and bearing upon the side of one of the wings and so pressing
the other wing against the opposite side of the frame, and thus the necessary
amount of friction is obtained.
When it is desired to take the device to pieces the winged flap is raised upwards,
notches being left or formed in the wings at the top, close to the front flap, to
receive the downward projections on the frame flange (which engage the horns on
the outer extremities of the wings), the lower part of the winged flap is now drawn
outwards and it is at once removed; the reverse operation is gone through when
replacing it, the spring being first held back until the side wing passes it.
To prevent the winged flap coming unhinged of its own accord we pivot a
quadrant to the upper part of the frame flange the centre of the said quadrant
being suitably weighted to ensure its dropping every time it is displaced, the lower
edge of it fits on the top edge of the winged flap and. has to be moved out of the
way when it is desired to take out or replace the said winged flap.
It is evident however that any suitable device may be adopted to suit different
-requirements or positions for preventing the winged flap coming unhinged of its
own accord, also, that any well-known forin of opening and closing device may be
used for operating the aforesaid winged flap.

page_text: Improvements In Ventilators.
We, JOHN GREEN and WILLIAM ROWLAND GREEN of Norfolk Works,
Ecclesfield in the County of York, Ironfounders, and HERBERT HAGUE of
Prospect Cottage, The Cross, Ecclesfield aforesaid, Pattern Maker, 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 effect certain improvements in and simplify the
construction of that class of ventilator which is designed for -fixing in walls,
partitions and the like, and in which a flap with side wings is usually hinged to the
front of the framework which is adapted to be fixed in brickwork, stonework.or in 1
any suitable manner in walls, partitions and the like; the said framework.being
generally open or provided with a grating or grid at the back; our invention
may also be applied to canopies of fire grates or stoves as will be hereinafter
explained.
Referring to the accompanying sheet of drawings which form a part of this 11
Specification:-
Figure 1 is a front elevation of our improved ventilator.
Figure 2 is a vertical section on line a,' 'a,' of Figures 1 and 3.
Figure 3 is a plan on line 'b,' ',' of Figures 1 and 2.
Figure 4 is a vertical section shewing another application of our.invention to be
hereinafter explained.
In carrying out the first portion of our said invention we cast or form a
rectangular framework or box A to be fixed in the wall or partition, the said box.or
frame having a front flange B on the apartment side in the usual way, we also
employ a flap C with radial side wings D, at the junction of which with the flap
at the lower end, we form a recess or notch E on each side, the said .recesses or
notches fitting on upward projections F of the front flange of the frame; the
bottom edge of the flap fits or rests on two or more studs G or the like projecting
outwardly from the face of the lower part of the front flange of the frame; a
cut or chase His formed immediately above the last mentioned studs, of the full:
width of the flap, so that when the said flap is drawn out it turns on its centre.or
hinge and its bottom edge fits into the chase, the studs taking a certain amount of
strain off the joint between the winged flap and frame or box the upper and
outer extremities of the wings are provided with horns or stops I which engage
downward projections K on the upper part of the frame flange, and so limit the
play of the winged flap.
To stop the winged flap in any desired position we employ a spring L fixed to
the side of the frame and bearing upon the side of one of the wings and so pressing
the other wing against the opposite side of the frame A¹ (see Figure 3) and
thus the necessary amount of friction is obtained.
When it is desired to take the device to pieces the winged flap C is raised
upwards, notches M being left or formed in the wings at the top, close to the front
flap, to receive the downward projections K on the frame flange (which engage the
horns I on the outer extremities of the wings) the lower part of the winged
flap is now drawn outwards and it is at once removed; the reverse operation is
gone through when replacing it, the spring L being first held back until the side
wing passes it.
To prevent the winged flap coming unhinged of its own accord we pivot a
quadrant N to the upper part of the frame flange the centre of the said quadrant
being suitably weighted such as by the stud N to ensure its dropping every time.
it is displaced, the lower edge of it fits on the top edire of the winged flap and

page_text: has to be moved out of the way when it is desired to take out or replace the said
winged flap.
It is evident however that any suitable device may be adopted to suit different
requirements or positions for preventing the winged flap coming unhinged of its
own accord, also that any well known form of opening and closing device may be
used for operating the aforesaid winged flap.
Our invention may also be applied to a number of other purposes such as to the
hanging of adjustable canopies to fire grates and the like (Figure 4 being a vertical
section shewing such application) in this case the winged flap C would be reversed,
that is to say, it would be hinged at the top and the side wings D would rest and work
upon brackets O at the bottom, unless there was a bottom rail to the canopy frame,
the notches (shewn at M Figure 2) at the junction of the radial portion of the
side wings with the flap would in such a case be dispensed with and the
quadrant N be placed above the hinge so that when at rest it would just touch
the top of the flap or canopy C. To take out the latter the quadrant is held
upon one side, the flap raised so that the recesses or notches E at the joint of the
side wings with the front flap or canopy C pass upwards above the top rail Q of
the canopy frame sufficiently far to allow the stops or horus 1 of the side wings
to be passed over the brackets O. It will thus be seen that our invention may be
used for enlarging or diminishing the draft of fires when used as a canopy and will
thus become a blower.
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 :-
1. The improved ventilator consisting of a front flap C with side wings D
notches or recesses E and M, and stops I, in combination with a frame carrying a
weighted quadrant or the like N, N', projections F and K, studs G, chase H, and
spring L substantially as described and illustrated.
2. The movable canopy C¹ with side wings D, stops I and recesses or
notches E, the said side wings being adapted to engage or work upon brackets
or the like O, a weighted quadrant N, N' pivotted to the top rail or the like Q of
the canopy frame, and chase H substantially as and for the purposes described and
illustrated.
Dated this 19th day of September 1895.
W. SWINDELL,
Agent for the Applicants.