An Improvement in or relating to Door Frames, applicable to Iron or similar Plated Structures.
Year: 1892

page_text: Date of Application, 6th July, 1892
Complete Specification Left, 28th Sept., 1892-Accepted, 29th Oct., 1892
PROVISIONAL SPECIFICATION.
An Improvement in or relating to Door Frames, applicable to Iron
or similar Plated Structures.
We, WILLIAM ROCKLIFFE of 35 South Street Durham, Engineer and
EDWARD JOBLING of 59 Hartington Street, Sunderland, Boiler Smith, both in
the County of Durham, do hereby declare the nature of this invention to be as
follows:-
This invention refers to an improvement in or relating to door frames applicable
to iron or similar plated structures.
According to the system now in vogue for fixing metal frames to iron plate-
work, the opening for the doorway is first cut or punched out of the plate and then
around the ragged margin so formed and on the inside thereof a metal frame is
attached by rivets.
The result of this mode of construction is to leave an unsightly opening on the
outside of the plate between the ragged plate edge and the casting which has to be
filled up with cement and the rivetting is also a frequent cause of fracture of the
frame castings.
According to our improved construction we do away with this rivetting and we
avoid the unsightly patch work above described by making the frame with an
external overlapping flange and by casting threaded studs therein or these may be
screwed into the frames or bolts may be used or their equivalent.
The frame is thus secured to the outside of the plating whereby considerable
economy accrues both in material and labour.
th: 10th day of August 1892.
A. CRAWHALL CHAPMAN,
3, St. Nicholas Buildings, Newcastle-on-Tyne, Patent Agent.
COMPLETE SPECIFICATION.
An Improvement in or relating to Door Frames, applicable to Iron
or similar Plated Structures.
We, WILLIAM ROCKLIFFE of 35 South Street, Durham, Engineer and
EDWARD JOBLING of 59 Hartington Street, Sunderland, Boiler Smith, both in
the County of Durham, 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 improvement in or relating to door frames applicable
to iron or similar plated structures and is specially applicable to plate iron work
such as exists on ships and in analogous instances.
The object of our invention is to improve the appearance of the framing when
completed and to effect a sounder result as compared with the ways in which these
door frames have been hitherto secured.
It has been a common practice to cut out a doorway in plate iron by punching
a series of consecutive holes in the plate by which method the edges of the plate
cut out as well as the edges of the plate out of which the door has been cut are
left in a ragged condition.
When therefore all these ragged edges have been taken off, the result is that
either the plate cut out is no longer available for service as a door in its original
position or else the door framing of metal has had to be extended, that is to say,
increased in size both inwardly and outwardly, so as to make the diminished plate

page_text: serve as a door and the effect of such a course is to make the door frame much
heavier than necessary.
By our invention we reduce this difficulty in construction and we do so by
securing the door frame on the outside of the plating, so that the outside moulding
or flange of the door frame shall serve as a covering to the ragged edging of the
plate from which the door has been cut whereas when door frames are secured
inside the plating as heretofore, the space between the framing and the ragged
edging of the plating has been filled up with a composition giving an unsightly
appearance.
By our invention we further improve the means of securing the door frame to
the plating by substituting for the rivet work, which is the cause of frequent
breakages of the framing, studs cast in the framing so that the latter may be
secured by nuts on the inside of the doorway.
We will fully explain our invention by reference to the accompanying drawings
in which Figure 1. shows a sectional plan and Figure 2 a vertical elevation of our
improved door frame.
In these figures A is the cast metal door frame, shown secured by screw studs C
to the plating A¹.
As will be seen, the raw edging of the plate whence the door has been cut is
concealed from view on the front side by the front moulding A³ of the frame, and
the space S where the composition is inserted between the plating and the frame
is only visible from behind.
The method of securing the frame by studs cast in the frame or by studs tapped
into the frame renders rivetting unnecessary and saves the risks attendant in this
system of securing the frames in position.
In certain cases and if desired, the framing A may be secured to the plating
by bolts.
Having now particularly described and ascertained the nature of our said inven-
tion, and in what manner the same is to be performed, we declare that what we
claim is :
1. The improvement in door frames suitable for attachment to iron or steel plate
work consisting in forming the door frame with an external overlapping flange A
so that the door frame may be secured to the plating on the front side thereof
whereby the advantages herein described may accrue substantially as set forth and
illustrated in the drawings.
2. The combination with a door frame formed as described and claimed in Claim 1
of studs cast in or otherwise secured to the said framing whereby rivetting in
rendered unnecessary in securing the frame to the plating substantially as herein
set forth.
Dated this 13th day of August 1892.
A. CRAWHALL CHAPMAN,
3, St. Nicholas Buildings, Newcastle-on-Tyne, Patent Agent.