Improvement in Window Ventilation of Dwelling Houses and other Buildings.
Year: 1891

page_text: Date of Application, 4th Mar., 1891
Complete Specification Left, 4th Dec., 1891-Accepted, 9th Jan., 1892
PROVISIONAL SPECIFICATION.
Improvement in Window Ventilation of Dwelling Houses and other
Buildings.
I, CHARLES ROBERT GREEN of 39 Clarendon Street, Pimlico, in the County
of London, Joiner do hereby declare the nature of this invention to be as
follows:-
In a sashframe constructed in the ordinary manner, bore a series of holes (h) as
shown on drawing, or make other openings in head (H) in that part where the top
sash (T) shuts against it when closed. Next, fix a lining or rail (R) across top of
sashframe in such a manner as to allow top sash to slide past it, such lining being
secured by groove in head (H) along its upper edge, and in pulley-stiles at its
ends, the parting beads between the sashes finishing under and against its lower
edge. This, in outline, completes the arrangement on sashframe as prepared for
fixing.
When the sashframe is being fixed in its place in the building, an opening must
be left between the top of inside head-lining (L) and the brick or stonework of
window head (B), the mouth of this opening being formed by edge of wall-face in
room and the back of architrave head (A) which is bevelled off for that purpose,
as shown.
This opening, combined with the holes (4) made in sashframe head, allows free
communication between the vitiated air in room and the outer atmosphere, which
communication takes place immediately upon the top sash being pulled down
behind the lining or rail (R) before mentioned this action uncovering the openings
in head of sashframe and also allowing fresh air to enter between the separated
meeting-rails (M. M.) of the sashes, no draught resulting so long as the top eash is
not pulled below the edge of rail or lining (R) mentioned.
Dated this 4th day of March 1891
CHARLES ROBERT GREEN.
COMPLETE SPECIFICATION.
Improvement in Window Ventilation of Dwelling Houses and other
Buildings.
I, CHARLES ROBERT GREEN of 39 Clarendon Street, Pimlico London, Joiner
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 an improved arrangement of ventilating rooms by
slightly opening the top window and will be best understood by describing same
by aid of the drawing filed with the Provisional Specification.
In a sash frame constructed in the ordinary manner bore a series of holes has
shown on drawing, or make other openings in head H in that part where top rail
of top sash shuts against when closed. Next put a lining or rail R of 3 inches or
other suitable depth so as to depend from the said head in such a manner as will
allow both sashes to slide past it, its thickness therefore, will be the same as that
of the parting beads between the sashes and its ends will be secured in the ordinary
groove in pulley stiles, the top ends of parting beads finishing against its lower
edge, the upper edge of rail being secured in groove in head of sash frame. With
the exception of some modification in the head-linings, mentioned hereafter, this
completes the arrangement on sash frame as prepared for fixing.

page_text: When the frame is fixed an opening of from 1 inch to 2 inches or more if con-
venient must be left between the top of inside head-lining of sashframe L and the
brick or stonework of head of window B the mouth of this opening then formed
by edge of wall face in room and the back of architrave head A which is bevelled
off for that purpose as shown in order to allow the free passage of air. Other
means may be employed as circumstances require, the one thing necessary being
that the architrave head should cover the opening or openings but not close it.
To facilitate free passage still further, the inside head lining of sashframe should
be made as narrow as possible, and for the same reason the outside head lining
should drop very little below the head of sashframe and be bevelled inwards as
shown. In order to secure easy control of sash when required, a cord may be
attached to top rail of same passed through opening in head of sashframe over
suitable pulley fixed on upper side of head passing down again through head, and
again attached to top of sash thus forming an endless cord which pulled one way
opens window the other or reverse way shuts it. The foregoing completes the
necessary arrangements the effect of which are as follows. When the top sash is
slightly pulled down behind the lining or rail before described but not below it,
the holes or openings in the head of sashframe are uncovered and the vitiated air
at the top of the room is allowed to escape into the outer atmosphere through the
aperture behind the architrave head before mentioned and the uncovered holes or
openings fresh air entering at the same time below in an upward direction through
the opening made by the separated meeting rails of the sashes, no down draughts
results so long as the top sash is not pulled down below the lining or rail in front
of it, the architrave head through shielding the inside opening likewise preventing
any draught from that quarter. If permanent ventilation be required at top of room,
the top rail by sash may be rebated, bevelled off, or notched opposite opposite
holes, so as to leave them permanently uncovered without opening window.
Having now particularly described and ascertained the nature of my said inven-
tion and in what manner the same is to be performed, I declare that what I
claim is
1. In a window with sliding sashes the combination of holes or other openings
a passage from room out to atmosphere and a pendant board R as hereinbefore
described and illustrated by the drawing referred to.
2. In a window for permanent ventilation the combination of an air passage from
room to atmosphere, holes ha pendant board R, and an upper sash bevelled off or
otherwise made to allow the holes h to be always unclosed.
1 1
בד
1001
FREDERIC PRINCE,
1, Quality Court, Chancery Lane, London, W.C., Agent for Applicant.