Improvements in Doors.
Year: 1893

page_text: Date of Application, 21st Aug., 1893
Complete Specification Left, 21st May, 1894-Accepted, 30th June, 1894
Improvements in Doors.
I, ARTHUR GEORGE BELL of 92 Sherwood Street, in the Borough of
Nottingham, Builder, do hereby declare the nature of this invention to be as
follows:-
This invention relates more especially to doors constructed of wood and it has
for its object the introduction into such doors of fireproof material in order to
render them more effective in checking the spread of fire without affecting their
outer appearance.
In carrying out this invention in a panelled door the outer styles and top rail of
the door framing are preferably formed with a groove or recess near the centre,
extending from their inner to near their outer edges and a shallow groove on each
side of the recess for the reception of the edges of the panels. The upper rail is
connected to the outer styles by double tenons formed at each end and fitting into
double mortices in the upper end of each style and at each side of the recess.
The middle and lower rails are formed in two halves, back and front, and are
connected to the outer styles with a space between them equal to the width of the
recess in the outer styles by tenon and mortice joints in the usual manner.
Grooves are also formed in each of their edges for the reception of the edges of
panels such grooves corresponding to the position of those in the outer styles.
The muntin or muntins are in like manner formed in two halves the edges of each
of which are grooved for the reception of the edges of panels, they are secured in
the usual manner to the rails with a space between them corresponding to that
between the middle and lower rails.
The spaces between the styles, muntins and rails are filled with double panels the
edges of which fit into the double set of grooves in the styles and the divided rails
and muntins.
With the foregoing construction a continuous central space extending over the
whole of the door is obtained and this may be filled with preferably asbestos board
or other suitable fireproof substance. These doors which are in appearance
similar to ordinary doors may be employed in situations where fireproof doors of
ordinary construction are too. unsightly and would materially check the progress
of fire.
In some cases the doors may be made throughout in two halves, back and front,
and secured together, with fireproof material such as asbestos board between them,
this construction is specially applicable to plain doors or where appearance is a
secondary object.
In connection with such doors, door jambs and lintels may be employed in which
fireproof material is introduced either by forming them in two halves and
introducing the fireproof material between the halves or forming grooves or
recesses in them and filling in with fireproof material.
Dated this 21st day of August 1893.
W. P. THOMPSON & BOULT,
Agents for the Applicant.

page_text: Пирго
I, ARTHUR GEORGE BELL of 92 Sherwood Street in the Borough of
Nottingham, Builder, 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 more especially to doors constructed of wood and it has
for its object the introduction into such doors of fireproof material in order to
render them more effective in checking the spread of fire without affecting their
outer appearance.
It will be best understood by reference to the accompanying drawings in
which―
Figure 1 is a front view of a door and framing constructed according to my
invention.
Figure 2 is a vertical cross section on line u u of Figure 1 and
Figures 3 and 4 are horizontal sections taken respectively on the lines xx
and Y y of Figure 1.
Like letters indicate like parts throughout the drawings.
In carrying out this invention the outer styles a a and top rail 6 of the door are
preferably formed each with a recess or groove near the centre extending from
their inner to near their outer edges and a groove or rebate on each side of the
recess for the reception of the edges of the double panels c. The top rail is
connected to the outer styles a a by double tenons & formed at each end and fitting
into mortices in each side of the groove in the styles a.
The middle or intermediate rail d and the bottom rail e are each formed in two
parts back and front, and they are connected to the outer styles a a with a space
between them equal in width to the recess in the outer styles, by tenon and mortice
joints d' el respectively. Grooves or rebates are also formed in the inner or upper
edges of the two parts of the bottom rail e and on the upper and lower edges of the
two parts of the intermediate rail d for the reception of the edges of the double
panels c.
Each muntin f, of which there may be one or more according to the number of
panels in the door, is in like manner formed in two parts and the edges of each
part are formed with grooves or rebates for the reception of the edges of the
panels c, they are secured by tenon and mortice joints to the rails bd and e with a
space between them corresponding to that between the two parts of the middle rail d
and bottom rail e.
The spaces between the styles, muntins and rails are preferably filled in with
double panels c the edges of which fit into the double sets of grooves or rebates in
the styles a a and top rail b, and the divided rails de and muntins f.
With the construction described a continuous central space extending over the
whole of the door is obtained and this space may be filled with preferably asbestos
board or other suitable fireproof substance g.
If preferred the styles a a and rail 6 may be formed each in two parts instead
of being recessed, but I preferably employ the construction described as it is
more convenient for attaching the door fittings and presents the appearance of an
ordinary door.
In some cases, and more especially in what is known as a frame ledged door, the
recesses in the styles and the top rail, and space between the two parts of the
bottom rail, may be made wide enough to receive two layers of fireproof material
between which is placed a skeleton frame, this frame is protected on both sides from
fire and also strengthens the door, so that the space between the styles and rails on

page_text: each side may be filled up without any muntins or intermediate rails, as in an.
ordinary frame ledged door.
Doors constructed in the manner described are in appearance similar to ordinary
doors and may be applied where ordinary fireproof doors are too unsightly and
inconvenient.
In connection with such doors, door jambs h and lintels may be employed,.
which are preferably built up, and a layer of fireproof material introduced at j
and k as shown in order to afford protection to the edges of the door.
Having now particularly described and ascertained the nature of the said inven--
tion, and in what manner the same is to be performed, I declare that what I
claim is :-
1. The combination with a framed door of a layer or sheet of fireproof material
contained within it substantially as described and illustrated in the accompanying
drawings.
2. The combination with a door of two layers or sheets of fireproof material.
separated by an intermediate frame and enclosed within the door substantially as
described.
3. The combination with a framed and panelled door of a layer or sheet of
fireproof material enclosed within such door substantially as described and
illustrated in the accompanying drawings.
4. A door constructed with double panels and framing and having extending
throughout an intermediate space filled with fireproof material substantially as
described and illustrated in the accompanying drawings.
5. The combination with the door jambs and lintel of a door of one or more:
intermediate layers of fireproof material such as j k substantially as described and.
illustrated in the accompanying drawings.
Dated this 10th day of Mov 1804
ARTHUR GEORGE BELL.
W. P. Thompson & Boult,
Agents for the Applicant..