Improvements in or connected with Window Sashes for Purposes of Ventilation.
Year: 1898

page_text: PROVISIONAL SPECIFICATION.
Improvements in or connected with Window Sashes for Purposes of
Ventilation.
I, EDWARD LUSCOMBE EVENS, of Cheltenham Street, Malvern, in the Province
of South Australia, Gentleman, do hereby declare the nature of this invention
to be as follows;-
My invention relates to certain improvements in and connected with window
sashes for purposes of ventilation, the special object of such invention being to
provide a means by which the outer air can be admitted into a room or hall with-
out causing the ill effects of draught to inconvenience the occupants.
In order to achieve the object of this invention I combine an adjustable
ventilator with the bottom rail of the upper window sash. I will further describe
my invention.
In the majority of window sashes now in use, it will be seen that the bottom rail
on the inside of the sash is fairly wide. To give effect to my invention, I cut
away a portion of such rail on each side of the bolt or fastening. Into the
recess thus formed I insert a hollow metal box or frame, preferably constructed
of cast material. The bottom portion of this box is perforated with holes of any
convenient shape, but preferably oblong holes are formed. These holes may be
covered with fine gauze wire of such a mesh as would effect the exclusion of insects;
such as flies. The upper part of the box is likewise perforated, and a loosely
sliding plate having solid parts of a similar pattern to the perforated parts before
mentioned is arranged in such a manner that when caused to slide in one direc-
tion it closes the perforated passages in the upper part of the box, but allows a
free passage when placed in the opposite direction.
To enable the sliding motion to be effected I construct a projecting knob which
is connected with the sliding plate and can be moved backwards or forwards at
the will of the operator. In the arrangement herein before described I have
specified my invention to suit windows at present, in use, and in order that the
cutting of the bottom rail should not cause a material loss in strength of the same;
I connect the two metal cases together by means of a metal bar or lath thus adding
rigidity to the device. In applying my invention to new window sashes, I prefer
to use one ventilator in lieu of two, and in such arrangement I place my ventilator
in the middle of the sash, that is to say in the position at present occupied by
the lock, but in the middle of the casting I form a strong boss, to which the
fastening lock is secured, and in addition to the single or middle lock a sliding
bolt may be arranged at either or both ends of the ventilator. It will readily
be understood that by the combination of an adjustable ventilator with tho
bottom rail of the sliding sash, the means of ventilation thus afforded enables the
fresh air to be admitted into the room above the heads of the occupants, and in
such a position that it does not cause the inconvenience of draught. It will also
be seen that the means of adjustment is within easy access of the operator, so that
the ingress of the air can be regulated without difficulty, whilst the location of

page_text: My
the ventilator is such that it prevents the admission of rain or snow.
appliance forms no impediment to the opening or closing of the window, and
is preferably held in place by means of screws arranged so as to have their heads
opposite to the top rail of the bottom sash when the window is closed, so that they
cannot be interfered with from the outside, but can be readily removed for effect-
ing repairs by the occupant of the room who would merely have to throw up the
bottom sash, and draw down the upper sash to enable him to remove the screws
for the purposes indicated. The upper part of my ventilator is hinged so that it
can be raised longitudinally or laterally for cleaning the interior.
D 1
001
1900
WM: P: THOMPSON & Co.,
Of 6, Lord Street, Liverpool, Agents for the Applicant. -
Improvements in or connected with Window Sashes for Purposes of
Ventilation.
I, EDWARD LUSCOMBE EVENS, of Cheltenham Street, Malvern, in the Province
of South Australia, Solicitor, 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;-
-
My invention relates to certain improvements in and connected with window
sashes the special object of the invention being to utilise for purposes of ventila-
tion a portion of the window frame or sash not hitherto made use of for that
purpose by combining adjustable ventilators therewith, in such a manner as to
prevent any inconvenience of direct draft arising from the use of such ventilators,
the arrangement being such that the ventilators do not interfere with the locking
gear, the requisite locking gear being preferably integral with the ventilator.
In order that my invention may be the better understood I will now proceed
to describe the same by aid of the accompanying illustrative drawings, wherein;-
Fig. 1 represents a part elevation of the upper window sash showing the
ventilator in section and locking gear integral therewith.
Fig. 2 is a plan of same but also illustrating the adjacent sash, and the lock
engaged in its catch.
Fig. 3 is a part elevation of the outer window sash showing similar principles
of ventilation being of a simpler construction, the lock being omitted.
Fig. 4. Part elevation of upper and lower sashes in part section showing the
arrangement of the catch of the locking mechanism integral with the ventilator.
Fig. 5. Cross section through both sashes showing the ventilators and locking
gear integral therewith, the illustration being on a larger scale.
Throughout the drawings similar letters of reference are used to denote similar
or corresponding parts whereever they occur.
In this respect A A are the sashes, and B the glass. C is the ventilator frame,
the bottom portion of which is provided with oblong or other perforations shewn
at X in Fig. 5. The upper portion of the ventilator is surmounted with a non-
sliding grid C, oblong holes C² being formed therein. At the ends of the venti-
lators a recess C is formed. ¹ is a sliding grid arranged immediately underneath
the fixed grid C¹, and is provided with an adjustment knob which projects up-
wards through the recess C³ above mentioned. The foregoing ventilator is depicted
in Figs. 1 and 2 of the drawings. Both the upper and lower grids are hinged
at C, the lower grid being. longitudinally recessed as indicated by dotted lines in
Fig. 2 so as to clear the centre pin D of the lock bar D'. But on reference to

page_text: Fig. 3 it will be seen that the ventilator which is used in combination with the
sash is of a simpler construction, and may be applied where arrangements for
locking are not required to be used in the position occupied by the ventilator.
In this ventilator as in the one previously described a hinge is provided at C+
so that the grids can be elevated for cleaning purposes, a pin or turn button being
arranged at C for retaining the grids in position. A. strip of fine wire gauze
(not shewn in the drawings) may be inserted within the ventilator to effect the
exclusion of insects.
Referring now to Figs. 2, 4 and 5 it will be seen that the catch of the locking
mechanism does not in any way interfere with the ventilator, the catch being pre-
ferably arranged on a projection C of the ventilator casting and consists of a
metal plate having a turned back tongue or spring E which is capable of being
depressed. The said tongue extends backwards beyond a vertically sliding
bolt E riveted to or integral with such plate, a recess for the reception of said
bolt and a stop pin or lug E³ for limiting the traverse of the lock 1 being also
provided.
The projecting part of the ventilator casting is recessed sufficiently to allow
the spring plate E to be pressed flush with the window sash so that it forms no
impediment to the lock D¹. The operation of my invention may be described
as follows;.
-
When it is desired to admit air through the window sash and into the room
which it is required to ventilate, it is only necessary to push the sliding grid by
means of the knob c² until the holes in the two grids come opposite to each other.
If on the other hand it is desired to cut off the supply of air the knob & is pushed
in the opposite direction so that the solid parts of the sliding grid are opposite
to the perforations of the fixed grid. By this means it will be seen that a portion
of the window hitherto not used for ventilation is made accessible for that purpose
and as my appliance at the same time constitutes integral new portions of an
efficient lock, it will be obvious that it does not interfere with the locking
mechanism, for it will be seen that the centre pin D forms the pivot or fulcrum
upon which the lock 11 revolves whilst the projection C on the opposite ventilator
constitutes the base of the catch plate E, and also acts as a steadiment for the
vertically sliding bolt E¹. The operation of this part of the mechanism will
readily be understood from Figs. 2 and 4 of the drawings from which it will be
seen that as the lock bar is revolved across the front sash it depresses the plate E³
until finally it passes beyond the extremity of such plate. As soon as it has
finished its travel the plate springs up and it then becomes a difficult matter
to move the lock except from the inside as the space between the end of the spring
plate and the projection E³ is only just sufficient to allow the lock bar D¹ to pass
between them, and any attempt to improperly revolve the lock bar from the
outside for unfastening purposes results in causing the bar to pass under and be
trapped by the projecting end of the plate E so that the latter cannot be depressed.
Having now particularly described and ascertained the nature of my said
invention, and in what manner the same is to be performed, I declare that what
I claim is:―
1. In improvements in or connected with window sashes for purposes of ventila-
tion the combination of an adjustable ventilator with a window sash substantially
as described and illustrated.
2. In improvements in or connected with window sashes for purposes of ventila-
tion the hinged portion D' whereby access can be gained to the interior of the
casting for cleansing purposes, substantially as described and illustrated.
3. In improvements in or connected with window sashes for purposes of ventila-
tion the projecting lug or casting D integral with the main casting for the purpose
of carrying the locking bar D₁ substantially as described and illustrated.
4. In improvements in window sashes for purposes of ventilation a depressing
spring E provided with an integral vertically sliding bolt E', a recess E², and

page_text: a projection or stop E³ for engaging the lock substantially as described and illus-
trated.
5. The herein specified improvements in window sashes constructed and arranged
substantially as described and illustrated as and for the purposes set forth as a
combination of parts.
W. P. THOMPSON & Co.,
Of 6, Lord Street, Liverpool, Agents for the Applicant.