AN IMPROVED APPLICATION TO HINGED DOORS CASEMENTS AND OTHER LIKE OPENINGS OF APPARATUS WHICH WILL EXCLUDE THE ENTRANCE OF DRAUGHTS RAIN OR DUST TO ROOMS OR COMPARTMENTS 23
Year: 1883

page_text: LETTERS PATENT to Joseph Warhurst of 74 Denmark Road Kilburn in the
County of Middlesex for an Invention of "AN IMPROVED APPLICATION TO
HINGED DOORS CASEMENTS AND OTHER LIKE OPENINGS OF APPARATUS WHICH
WILL EXCLUDE THE ENTRANCE OF DRAUGHTS RAIN OR DUST TO ROOMS OR
COMPARTMENTS
23
PROVISIONAL SPECIFICATION left by the said Joseph Warhurst at the
Office of the Commissioners of Patents on the 15th November 1883.
JOSEPH WARHURST of 74 Denmark Road Kilburn in the County of Middlesex
"AN IMPROVED APPLICATION TO HINGED DOORS CASEMENTS AND OTHER LIKE
OPENINGS OF APPARATUS WHICH WILL EXCLUDE THE ENTRANCE OF DRAUGHTS
RAIN OR DUST INTO ROOMS OR COMPARTMENTS"
The object of this Invention is adapting to doors of rooms or compartments an
arrangement of sliding shutter which will when the door is shut so close the space
between the bottom of the door and the door step or floor that it will prevent the
entrance to such rooms or compartments of draught rain or dust, the said invention
being a further development of Letters Patent granted to me in 1869 N° 1690 and
consists of a flat piece of wood or metal or a combination of the two equal in
length to the width of the door, and which I term the base board or shutter which
is suspended in slides by chains or other durable flexible material from a roller
supported in brackets projecting from a back plate of metal fixed to the door. One
end of this roller outside its supporting bracket and near to the hinged portion of
the door forms a quick-pitched screw which fits into a nut projecting slightly
beyond the edge of the door when the door is open and is prevented from turning
but capable of sliding on the thread of the screw bearing in manner hereinafter
described-The said roller supporting the base board or shutter is also provided
with a spring tape or its equivalent one end of which is fastened to the roller and
the other end to the back plate. The jamb of the door opposite the end of the
aforesaid projecting nut is provided with a plate or spring finger against which the
nut presses when the door is shut. The door when open allows the various parts
to assume their normal positions but immediately the door is closed the sliding

page_text: nut is forced into contact with the plate or yielding finger let into the door jambs
the pressure of which forces the said nut to slide on its screw bearing and so
causes it to give a partial revolution to the roller from which the base board or
shutter is suspended this turn given to the roller also winds up the tape spring so
as to give a reserved tention which when the spring is released will give a reverse
turn to the said roller; thus it will be seen that when the door is closed the sliding
action of the nut will through the revolution given to the roller not only give a
wound up tention to the spring tape but will simultaneously lower the shutter
into contact with the ground the bottom edge of the shutter being provided with
india-rubber or other flexible material so as the better to make perfect contact with
the floor. When the door is opened the gradual release of the nut as it leaves the
plate or spring finger fixed to the jainb of the door leaves the spring coiled round
the roller free to uncoil the action of which simultaneously winds up the chains
supporting the base board or shutter giving it thereby a direct perpendicular rase,
and it also (through the medium of the quick pitched screw on the end of the
roller) forces the sliding nut into a position slightly beyond the edge of the door
ready to be again acted upon when the door is closed in manner as herein
described.
The parts composing this apparatus are simple, effective, not liable to get out of
order, and can be let into the bottom of the door or so fixed as to be shielded by a
moulding and when fixed to the parts are firm, solid and virtually indestructable, the
shutter being so arranged that its bottom edge bedding against the ground can be
lowered or raised so as to be adjusted to the level and inequalities of the door stop
or floor without the necessity of disturbing the apparatus

page_text: SPECIFICATION in pursuance of the conditions of the Letters Patent and
of an Order of the Lord Chancellor filed by the said Joseph Warhurst in the
Patent Office on the 26th May 1884.
JOSEPH WARHURST. of 74 Denmark Road, Kilburn in the County of Middlesex.
"AN IMPROVED APPLICATION TO HINGED DOORS, CASEMENTS, AND OTHER LIKE
'OPENINGS OF APPARATUS WHICH WILL EXCLUDE THE ENTRANCE OF DRAUGHTS,
RAIN OR DUST INTO ROOMS OR COMPARTMENTS
33
The object of this Invention is adapting to doors of rooms or compartments an
arrangement of sliding shutter which will when the door is shut so close the space
between the bottom of the door and the door step or floor that it will prevent the
entrance to such rooms or compartments of draught, rain, or dust, the said
Invention being a further development of Letters Patent granted to me in 1869
N° 1690.
In order that this my present Invention may be well understood and explained
in detail I have hereunto annexed a sheet of Drawings shewing as an example
the application of my Invention to an ordinary door similar letters of reference
being marked upon corresponding parts on all the Fios alike.
Fig. 1. represents in front elevation the improved arrangement of apparatus as
applied to the bottom of a door, the moulding shielding the apparatus being
partly removed in order that the actuating portion of the mechanism may be seen.
Fig. 2 represents an end elevation of Fig. 1. Fig. 3 represents an end section of
Fig. 1. through the line x-x this view shews the arrangement of spring for winding
up the shutter when the door is open. Fig. 4 represents a similar view to that
shewn at Fig. 2. the only difference being that the apparatus is let in flush with
the bottom of the door, whereas in Fig. 1 and 2 the apparatus is fixed to the
surface of the door at the bottom and covered or shielded by a moulding. Fig. 4
represents the position of the shutter when the door is open and Fig. 5 the same
view when the door is closed. Fig. 6 represents in perspective the bottom portion
of a door to which the apparatus is fixed and covered by a moulding...
In these views. a is the door, b a flat piece of wood or metal or a combination
of the two, to the bottom of which a flexible strip of material, such as india-rubber,
felt, asbestos or the like is attached, this flat piece of wood or metal which I term
the base board or shutter is equal in length to the width of the door and I suspend
it by chains, tape or other flexible band c, from the roller or rod d, supported in
the brackets e, secured to and projecting from the back plate f, fixed to the
door a
Or in lieu of flexible bands forming the suspending medium I prefer in adapting
tbe shutter or base board to large doors to use a pinion and rack arrangement for
raising and lowering the shutter. One end of the rod or roller d outside its
supporting bracket and near to the hinged portion of the door a forms a quick
pitched screw g fitting into a nut h which in its normal state when the door is open
projects slightly beyond the edge of the door.
The roller or rod d supporting the base board or shutter b is also provided with
a spring tape or its equivalent as seen at Fig. 3. one end of this spring tape is
fastened to the roller or rod d and its other end to the back plate f. The jamb k
of the door opposite the end of the aforesaid projecting nut h is provided with a
plate or spring finger 1, against which the projecting end of the nut h presses when

page_text: .
the door is closed. The door a when open allows the parts to assume their normal
positions but immediately the door is closed the sliding nut h is forced into contact
with the plate or yielding finger 1, the pressure of which forces in the projection
of the nut h, and so causes such nut to slide on the screw g of the rod or roller d,
the action of which gives a partial revolution to the roller d, from which the base
board or shutter b is suspended.
This forced revolution given to the roller d, winds up the spring tape i, so as to
give it a reserved tension whilst the door is closed, but when the door is again
opened, the said spring as its tension is released reverses the action of the roller
and its screw in the sliding nut h and forces such nut outwards so as to project
slightly beyond the edge of the door, as seen at Figs 1 and 6. At the time the
spring tape i is wound up, when the door closes the flexible band supporting the
base board or shutter b unwinds so as to lower such shutter into contact with the
floor as seen at Fig. 5.
It will thus be seen that when the door is finally closing, the sliding action
given to the nut h, by its contact with the plate 7, will through the revolution
given to the roller d as before described not only wind up the spring tape i, but
will simultaneously lower the shutter b, into contact with the ground or door step,
perfect contact therewith being made by means of the india-rubber, asbestos or
other flexible strip of material herein before mentioned. When the door is opened
the nut h is relieved from pressure which allows the coiled spring i to unwind, the
action of which simultaneously forces the sliding nut h slightly beyond the edge of
the door and winds up the flexible tape supporting the shutter or base board b,
giving it thereby a direct perpendicular rise.
Any inequalities in the surface of the door step or floor-immediately underneath
the door when closed can be filled in by the strip of flexible material forming the
bottom of the base board or shutter b, such material when it comes into contact
with the floor being cut or shaped so as to fit the same, provision being made
whereby the lower surface of such shutter can be adjusted to come into contact,
with the step or floor, when the door is closed. When required the shutter can
also be made to have a greater drop at one of its ends, than at the other by simply
increasing the diameter of the roller d at that point where the suspending band is
connected, this increase in the diameter may be effected by simply giving such band
one or more turns on the said roller d.
Having now described the nature of my said Invention together with the means
employed for carrying the same into practical effect. I wish it to be understood in
conclusion that what I claim as new and as of my Invention is
The novel adaptation to hinged doors, casements and the like of a base board,
or shutter for excluding draughts, rain, or dust which is actuated as the door is
opened or closed to rise and fall in a direct perpendicular line in the manner as
herein substantially described set forth and illustrated in the Drawings annexed.
In witness whereof I the said Joseph Warhurst have hereunto set my hand
and Seal this the twenty second day of May in the Year of Our Lord One
thousand eight hundred and eighty four
TANKS