Improvements in the Means of Admitting Air into Rooms for the Purpose of Ventilation.
Year: 1893

page_text: * Date of Application, 23rd Feb., 1893-Accepted, 25th Mar., 1893
COMPLETE SPECIFICATION,
Improvements in the Means of Admitting Air into Rooms for the
Purpose of Ventilation.
I, GEORGE BRAY, of Blackman Lane, Leeds, in the County of York, Gas
Lighting Engineer, 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 :-
This invention relates to certain improvements in the means employed for the
admission of fresh air into rooms for the purposes of ventilation as described and
shown in a Specification of Letters Patent granted to me No. 5137 A.D. 1891.
In my said Specification I did not confine myself to any particular material in
the construction of the ventilator, but it has been my practice to make same in wood.
But it has been found, when made of such material, and placed in new damp walls,
and during the prevalence of wet weather, that the sides of the case and likewise
the door, to some extent swelled, and the door became tightened with the effect that
it could not be opened or closed without difficulty. It has also been found that the
pins of the hinges on which the door moved became rusted and that in consequence
the hinges could not be moved on the pins and were liable to be torn off.
I, therefore, decided that it was desirable that the same should be made of cast
metal in one piece, and that the door with the deflectors upon it should be cast also
in one piece, and above all that there should be no hinges.
I secure the door without hinges and it can be opened or shut in the following
manner: Near the front edge of the bottom of the case, I cut a groove, from end
to end of a shallow V shape by preference, to receive the bottom edge of the door
which is also V shaped to suit the groove. The door so formed rocks in the groove
when the door is being opened or shut.
To hold the door in the groove I fasten near the upper part of the back and
inside the casing a spring, the front end of which extends nearly to the front of the
casing and terminates in a downward bent form. This end of spring presses on
the top of one of the deflectors and holds the door in the groove, and also holds the
door in any desired position between the closed and full open. To prevent the
door from being opened too wide, and detaching itself from the groove I place on
the top of the said deflector, and near its inner end a stopper, so that when the
door is opened, this stopper comes in contact with the bent end of the spring.
As the bent end of the spring is a little distance from the front edge of the casing,
it is necessary in order to allow of the door being opened at full, that the deflectcr
to which the stopper is fastened should be longer on its top edge than the other
deflectors. Accordingly I make it longer, and in order to allow of the door being
closed, I make an opening of suitable size and in a suitable position in the back of
the casing, through which the extended end of the said deflector passes when the
door is shut.
The door is opened or closed by means of an ordinary knob screwed into it,
and if desired can be easily taken out for cleaning, and replaced, by lifting up
the spring.
This method of construction has the following advantages, the door cannot be
tightened in the casing by damp. There are not any hinges to rust, or to get
out of order otherwise. The ventilator is produced in a simple and more
economical manner, and will be much more, durable.
In order that my invention may be fully understood, I will describe the same
by making reference to the accompanying sheet of drawings in which
Fig. represents a back view showing the deflectors A. B. C and D. (I do
not confine myself to any particular number of deflectors) cast on.

page_text: Fig. 2 represents a section through line a, b, showing ventilator closed with the
deflector B, extended end E, stopper F. and spring G.
Fig. 3 represents a similar section with the ventilator open showing the
stopper F engaging with the spring G.
Fig. 4 represents a septional plan of Fig. 1, the top portion being removed.
When the bottom edge of the door is placed in the groove V and the door J is
pressed inwards at the top, so that the stopper F is pressed beyond the bent
end G of spring G. the spring presses upon the top of the deflector B. The
door is thereby held securely in the groove V, yet in such a way that, it can
be easily opened or shut without liability of the door falling to the ground
when the ventilator is opened at full, because of the stopper F coming in contact
with the bent end G of the spring G. The said spring also keeps the door
in any desired position between the closed and full open.
Having now particularly described and ascertained the nature of this inven
tion, and in what manner the same is to be performed, I declare that what I
claim is:-
The securing of the door of the ventilator substantially in the manner as and
for the purpose hereinbefore set forth, and indicated by the accompanying
drawings.
Dated this 21st day of February 1893.
JOHN WAUGH,
Agent.