Improvements in Doors:
Year: 1899

page_text: Date of Application, 27th Feb., 1899-Accepted, 1st Apr., 1899
Improvements in Doors:
I, LYDIA STRUBE, of 2, Place, St. Jean, Brussels, in the Kingdom of Belgium,
Manufacturer, 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:-
1
This invention relates to a novel kind of door which is chiefly designed to
prevent draughts.
According to the invention I provide a number of leaves mounted upon a central
axle or spindle, which serves as a pivot for the door, and movable between two
fixed curved panels in such a manner that at least two leaves of the door are
always in contact with the fixed panels thus preventing the generation of any
air current, the door being permanently closed and open; in practice the movable
panels are preferably given a suitable curvature to prolong their contact with
the fixed panels and to prevent the production of air currents in the apartment
closed by the door.
To enable the invention to be fully understood I will describe it by reference
to the accompanying drawing which illustrates as an example a door constructed
according to the invention; in the said drawing,-
Figure. is an elevation of a door made according to the invention; and
Figure 2 is a plan view thereof partly in section.
To the centre of the frame of an ordinary door, for example, there is mounted
a central pivot or axle a (Figure 2) upon which four leaves.b, c, d, e of a suitable
curved shape are fixed, for instance by means of bolts.
Upon the jambs f and g of the door frame there are fixed, two panels h, i
curved to correspond to an arc of the circle described by the outer edges of the
leaves b, c, d, e in their rotation upon the axle a. The space / which is left
free between the two fixed panels h, i forms the entrance to. the door. As will be
easily understood the peculiar shape of the leaves b, c, d, e combined with that
of the panels h, i prevents any current.of air from passing to the interior of the
chamber closed by the door, no direct passage being ever established between the
two spaces situated upon the two sides of the door. A person passing through
the entrance has merely to push the leaf b, for example, to pass into the
chamber by the rotation of the axle 1, the leaf e coming into contact with the
panel h before the leaf b has passed the jamb f in such a manner that at the
moment the said person enters the chamber the door is already closed behind
him.
It may be remarked that a door constructed according to my invention not
only possesses the advantage of avoiding the generation of air currents from
the outside to the inside of the room, but it does not give rise to draughts by its
rotation; this latter result is due to the curved shape of the movable leaves
which confines the displacement of air to the inside of the circle described by the
said leaves in their rotation.
The panels h. i, can, as shewn in the drawing, be attached by means of hinges m

page_text: to the jambs f and g in such a manner as to permit their being opened and
closed as in ordinary doors, and in this case the said panels can be fixed by
means of bolts o in the position required for the operation of the door; furthermore
as above mentioned the leaves b, c, d, e can be secured to the axle a by means of
bolts, for example, whereby any one of the said leaves can be easily removed
if desired.
The door may also be provided at its upper part with a small circular screen n
or the like for preventing the passage of air above the door; this screen is
preferably mounted upon hinges at each side of the door way in such a way as
to enable it to be easily removed.
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 a door the combination of movable leaves, a common axle or pivot
supporting the said leaves and turning with them, and fixed panels with which
the leaves make contact in their rotation, substantially as, and for the purpose,
herein before described.
2. In a door the combination of movable leaves, a common axle supporting
the said leaves and turning with them and fixed panels of a shape curved to
correspond with the circle described by the movable leaves in their rotation,
substantially as, and for the purpose, described.
3. In a door the combination with movable leaves of a curved shape, a common
axle supporting the said leaves and turning with them, and fixed panels of a
shape curved to correspond to the circle described by the movable leaves in their
rotation, substantially as, and for the purpose, hereinbefore described.
4. In a door the combination of movable curved leaves, a common axle supporting
the said leaves and turning with them, curved panels hinged to the door frame
and curved to correspond to the circle described by the movable leaves during
their rotation and bolts for securing the said panels in the desired position,
substantially as, and for the purpose, set forth.
5. In a door the combination of movable curved leaves, an axle supporting the
said leaves and turning with them, panels hinged to the door jambs and curved
to correspond to the circle described by the movable leaves in their rotation,
bolts for securing the panels in the desired position and a screen placed above
the movable leaves, substantially as, and for the purpose, hereinbefore described.
Datel the 27th day of Hob 1890
G. F. REDFERN & Co.,
4, South Street, Finsbury, London, Agents for the Applicant.