Improvements in and relating to Devices for Excluding Draughts and Dust in Doors and the like.
Year: 1894

page_text: Date of Application, 28th May, 1894
Complete Specification Left, 31st Jan., 1895-Accepted, 9th Mar.. 1895
PROVISIONAL SPECIFICATION.
Improvements in and relating to Devices for Excluding Draughts
and Dust in Doors and the like.
I, WILLIAM NICOL, of 55 Albert Road, Crosshill in the County of the
City of Glasgow, Joiner, do hereby declare the nature of my invention to be as
follows:-
This invention has reference to improvements in and relating to devices for being
fitted to the lower parts of office or household doors and the like to prevent the
passage of draughts or dust into the apartinents, and which will be more simple
and efficient than the devices heretofore in use.
According to my improvements I fit a movable plate or board at the lower
horizontal edge of the door. This plate would have secured to its lower edge a
strip of india rubber, leather, or other flexible or fibrous material which would bear
on the carpet or floor when the door was closed and prevent any ingress of air or
dust between the floor and lower edge of door; but when the door was being-
opened, this improved device would automatically rise off the floor and offer no
obstruction to the opening of the door; and conversely when the door was being
closed this device would automatically fall again to act as a draught excluder when
the door was drawn or pushed to its closed position.
This
In carrying these improvements into practice under one arrangement the movable
plate would be made of a kneed shape at its lower part to form a recess to receive
the upper end of a strip of rubber or flexible material extending along its length
and which would be bound by a portable metal strip on the opposite surface and
the whole be secured together by rivets or like fastenings or by cement.
metal plate would be formed with a series of slots or openings, preferably with
bushed bearings, at distances apart, preferably three, one near the inner binged end
of door of an angled shape, one at centre of plate angling more towards the vertical,
and one near the opening edge of door with its angle approaching the vertical.
Screws or pins would be fitted near the lower edge of inner surface of door in the
paths of these slots in plate. A plate would be screwed to the fixed style or fraine
on which the door is hinged, and the free end of this plate would be formed of a
rounded or curved bowl shape to receive the curved surface of a bracket plate
rivetted or secured to the inner end of the movable plate. With this arrangement
when the door was being opened the movable plate would be adjustably hinged or
supported at its inner bracket end and automatically rise upwards at this end by its
slots moving over the screws in door and so keep clear of the carpet or floor; and
when the door was being closed the plate would automatically move downwards
and in the closed position of door the rubber strip would cover up the opening
between lower edge of door and carpet or floor. Instead of the movable plate
being formed with straight angled slots it may be formed with eccentric or cam
shaped slots; or alternatively instead of having its automatic compensating motion
from openings in plate, this automatic rising and falling motion may be obtained
from links having their one end or arın jointed to door and their other end jointed
to bar; or equivalent acting organs may be used to give this motion to plate.
Dated the with day of May 100t

page_text: Improvements in and relating to Devices for Excluding Draughts.
and Dust in Doors and the like.
I, WILLIAM NICOL, of 55 Albert Road, Crosshill in the County of the City of
Glasgow, Joiner, do hereby declare the nature of my invention, and in what
manner the same is to be performed to be particularly described and ascertained
in and by the following statement in writing, that is to say :-
This invention has reference to improvements in and relating to devices for being
fitted to the lower parts of office or household doors and the like, to prevent the
passage of draughts or dust into the apartments, and which will be more simple
and efficient than the devices heretofore in use.
And in order that my said invention and the manner of performing or carrying
the same into effect or practice may be properly understood I have hereunto
appended an explanatory sheet of drawings in which the same reference letters are
used to indicate corresponding parts in all the figures where shown.
Figure 1 is a front elevation of the lower portion of a door in its closed position
as fitted with my movable draught excluding plate.
Figure 2 is a view of the plate detached as in the full open position.
Figure 3 is a horizontal section showing the door in the closed position, and
Figure 4 is a similar view showing the door in the open position.
Figures 5 and 6 are an elevation to an enlarged scale and broken away and a
transverse section respectively of the inner part of a door as fitted with my draught
excluding plate.
Figure 7 is a transverse section through one of the slotted pin holes in plate.
Figure 8 is a similar view showing a modified way of securing the plate by means
of a strip of sheet metal; and Figure 9 is a like view showing the plate as formed
of wood or cast metal.
Referring to these drawings:-According to my improvements fit a movable
plate or board A at the lower horizontal edge of the door D. This plate A. would
have secured to its lower edge a strip of india rubber, leather, or other flexible or
fibrous material A' which would bear on the carpet or floor when the door was
closed and prevent any ingress of air or dust between the floor and lower edge of
door D; but when the door was being opened, this improved device A. would
automatically rise off the floor and offer no obstruction to the opening of the
door D; and conversely when the door was being closed this device would
automatically fall again to act as a draught excluder when the door was drawn or
pushed to its closed position.
In carrying these improvements into practice, under the arrangement shown, the
movable plate A would be made of a kneed shape at its lower part A² to form a
recess to receive the upper end of a strip of rubber or flexible material A' extending
along its length and which would be bound by a portable metal strip A" on the
opposite surface and the whole be secured together by rivets, or like fastenings or
by cement. This metal plate would be formed with a series of slots or openings a,
preferably with bush bearings, at distances apart, preferably three, one near the
inner hinged end of door of an angled shape, one at centre of plate angling more
towards the vertical and one near the opening edge of door with its angle
approaching the vertical. Screws or pins a¹ would be fitted near the lower edge of
inner surface of door in the paths of these slots a in plate A.
A plate e would be
screwed to the fixed style or frame E on which the door is hinged, and the free end
of this plate would be formed of a rounded or curved bowl shape e¹ to receive the
curved surface d' of a bracket plate d rivetted or secured to the inner end of the
movable plate A. With this arrangement when the door D was being opened

page_text: the movable plate A would be adjustably hinged or supported at its inner bracket
end d' and automatically rise upwards at this end by its slots a moving over the
screws a' in door D and so keep clear of the carpet or floor; and when the door D
was being closed the plate A would automatically move downwards and in the
closed position of door the rubber strip A' would cover up the opening between
lower edge of door and carpet or floor. Instead of the movable plate being formed
with straight angled slots a it may be formed with eccentric or cam shaped slots;
or alternatively instead of having its automatic compensating motion from openings
in plate A, this automatic rising and falling motion may be obtained from links.
having their one end or arm jointed to door D and their other end jointed to bar A ;.
or equivalent acting organs may be used to give this motion to plate A.
Having now particularly described and ascertained the nature of my said inven-
tion, and in what manner the same is to be performed, declare that what I
claim is : :-
First. In doors and the like, the fitting of a movable plate or board carrying
flexible or like material at the lower horizontal edge of door, with slotted holes and
pins, and bracket plate to move over a bowl or curved plate on fixed frame of door,.
substantially as and for the purposes herein described in reference to and shown in
the accompanying drawings."
Second. In doors and the like, the fitting and use of a movable draught excluding
plate or board, with bracket or curved plate or projecting surface at its inner
bottom edge in combination with a bowl or rounded plate or surface on fixed
frame, substantially as and for the purposes herein described in reference to the
accompanying drawings.
Dated the 30th January 1895.
W. R. M. THOMSON & Co.,
96, Buchanan Street, Glasgow, Agents.