IMPROVE- MENTS IN THE CONSTRUCTION OF DOORS. GATES, & SHUTTERS, PRINCIPALLY APPLICABLE FOR FIREPROOF PURPOSES
Year: 1861

page_text: LETTERS PATENT to William Stratford Hogg, of Rotherhithe Wall,
Rotherhithe, in the County of Surrey, for the Invention of "IMPROVE-
MENTS IN THE CONSTRUCTION OF DOORS. GATES, & SHUTTERS, PRINCIPALLY
APPLICABLE FOR FIREPROOF PURPOSES."
Sealed the 28th January 1862, and dated the 8th August 1861.
PROVISIONAL SPECIFICATION left by the said William Stratford Hogg
at the Office of the Commissioners of Patents, with his Petition,
on the 8th August 1861.
I, WILLIAM STRATFORD HOGG, of Rotherhithe Wall, Rotherhithe, in the
County of Surrey, do hereby declare the nature of the said Invention for
"IMPROVEMENTS IN THE CONSTRUCTION OF DOORS. GATES, & SHUTTERS, PRINCIPALLY
APPLICABLE FOR FIREPROOF BUILDINGS," to be as follows:-
My improvements in the construction of doors, gates, and shutters, consist
in forming them of a series of parallel iron or other metal bars rebated or
grooved to receive bricks or other moulded forms of earthen materials. In
many cases ordinary bricks answer the purpose perfectly well and may be
variously disposed according to the thickness of the structure required. The
parallel iron bars are combined with an external iron framing of the form
and size desired. If the bricks are to be placed edge to edge the grooves of
the iron bars are adapted to receive the ends of bricks in their narrowest
direction, the bars being disposed at distances apart equal to the length of
[Price 8d.]

page_text: the bricks; the bricks are slid into place and in close contact between each
two adjoining bars, & may be further cemented together if necessary to form
a close solid surface. The middle bars are double grooved, while the extreme
bars forming the external framing, say at top and bottom, need be grooved
only on one side, while the vertical side bars need not be grooved at all.
The bricks may be in like manner disposed with the sides in contact, in which
case the door or other structure will be thicker and the bricks may even be
placed with their length in the direction of the thickness of the door, but
for such thick structures I prefer to use larger bricks or moulded forms for
the purpose; for light structures moulded earthenware articles smaller than
bricks may be used. I mount these doors, gates, & shutters, on hinges or on
rollers so as to slide or otherwise as may be most suitable. This improved
construction of doors, gates, and shutters, are principally applicable for fire-
proof doors or shutters in warehouses and other buildings, but may be used
for dock gates and other purposes requiring no fireproof quality.
SPECIFICATION in pursuance of the conditions of the Letters Patent,
filed by the said William Stratford Hogg in the Great Seal Patent
Office on the 8th February 1862.
TO ALL TO WHOM THESE PRESENTS SHALL COME, I,, WILLIAM
STRATFORD HOGG, of Rotherhithe Wall, Rotherhithe, in the County of Surrey,
send greeting.
WHEREAS Her most Excellent Majesty Queen Victoria, by Her Letters
Patent, bearing date the Eighth day of August, in the year of our Lord One
thousand eight hundred and sixty-one, in the twenty-fifth year of Her
reign, did, for Herself, Her heirs and successors, give and grant unto
me, the said William Stratford Hogg, Her special licence that I, the said
William Stratford Hogg, my executors, administrators, and assigns, or such
others as I, the said William Stratford Hogg, my executors, administrators,
and assigns, should at any time agree with, and no others, from time to
time and at all times thereafter during the term therein expressed, should
and lawfully might make, use, exercise, and vend, within the United
Kingdom of Great Britain and Ireland, the Channel Islands, and Isle
of Mau, an Invention for "IMPROVEMENTS IN THE CONSTRUCTION OF DOORS.
FOR FIREPROOF PURPOSES,"
GATES, AND SHUTTERS, PRINCIPALLY APPLICABLE
upon the condition (amongst others) that I, the said William Stratford
Hogg, my executors or administrators, by an instrument in writing under

page_text: my, or their, or one of their hands and seals, should particularly describe
and ascertain the nature of the said Invention, and in what manner the
same was to be performed, and cause the same to be filed in the Great
Seal Patent Office within six calendar months next and immediately after
the date of the said Letters Patent.
KNOW NOW YE, that I, the said William Stratford Hogg, do hereby
declare the nature of my said Invention, and in what manner the same is
to be performed, to be particularly described and ascertained in and by
the following statement, reference being had to the Sheet of Drawings
hereunto annexed, and to the letters and figures marked thereon (that is to
say):—
My improvements in the construction of doors, gates, and shutters, consist
in forming them of parallel iron or other metal bars rebated or grooved to
receive bricks or other moulded forms of earthen materials. In many cases
ordinary bricks will answer the purpose perfectly well and may be variously
disposed according to the structure required. The parallel iron bars are
combined with an external iron framing of the form and size desired.
If
the bricks are to be placed edge to edge the grooves of the iron bars are
adapted to receive the ends of bricks in the narrowest direction, the bars
being disposed at distances apart equal to the length of the bricks; the bricks
are slid into place and in close contact between each two adjoining bars
and may be further cemented together while the extreme bars forming the
external framing, say at top and bottom, need be grooved only on one side
while the vertical side bars need not necessarily be grooved at all. The
bricks may in like manner be disposed with the sides in contact, in which
case, the door or other structure will be thicker and the bricks may even
be placed with their length in the direction of the thickness of the door;
but for such thick structures I prefer to use larger bricks or moulded forins
for the purpose; for lighter structures moulded earthenware articles smaller
than-bricks may be used. I mount these doors, gates, and shutters, on
hinges or on rollers so as to slide or otherwise as may be most suitable.
T'hese improved construction of doors, gates, and shutters, are principally
applicable for fire-proof doors or shutters in warehouses and other buildings,
out may be used for other purposes requiring no fireproof quality.
DESCRIPTION OF DRAWINGS.
The annexed Sheet of Drawings illustrates a variety of combinations of
arts constituting fireproof doors shutters & actes eccudia to
Ins

page_text: they are generally made of rather more than half the area of the opening
to be closed so that two of these structures are required for each opening;
they are mounted on rollers, as seen in Fig. 2, and run to the right and
left when opened, or meet in the centre when closed. These bars a, a, I make
of gutter irou as seen in the sections Figs. 3 & 4, & plan in Fig. 5, while
the intermediate bars are of H form, as also seen in the sections; the edges
of these bars embrace the bricks or moulded forms e, c, c, and form grooves
by which they are held in position. These bars a and b are fitted and
rivetted together as indicated in the sectional Figures 3, 4 & 5, and further
in Fig. which represents the end of b detached and as formed before being
united to a, the upright or side bar. The upper right hand corner of Fig. 2
shows the manner of uniting top bar a to side bar a, a tongue piece d. being
cut in the top bar and bent downwards so as to pass through a countersunk
hole in the side bar in which it is rivetted. The one side bar and the top
and bottom bar having been properly rivetted together the fireproof bricks
or other moulded articles c, c, are slid into position from the opposite side,
and when completely filled the remaining side bar is adjusted and rivetted
in position. If ordinary fire bricks are used the parts of these doors may
not require any further connection, but I prefer to make them of larger
fireproof lumps, having through holes to insert bolts e, e, as seen, and so
further bolt and secure the whole firmly together. These bolts have counter-
sunk heads in the meeting edges of the door, the nuts may, however,
project as seen; f, f, are the rollers fitted on axes in the bottom bar a, on
which the door runs as usual in metal grooves let into the floor.
It will be observed that the only difference between Figs. 1 & 2 is that
larger bricks or fire lumps are used; in Fig. 7 fewer horizontal bars 6 are
represented, it requires no further description; in Fig. S the fire lumps are
disposed in the opposite direction and consist of two only, the bolts e, e, being
substituted for the horizontal bars & pass laterally through the fire lumps
or moulded forms of fire clay, the frame a, a, being precisely as before
described; Fig. 9 is a vertical section of Fig. 8; Fig. 10 is a like door to
Fig. 8, but having three fire lumps instead of two; Fig. 11 is an illustration
of two fire lumps, connected & held together by frame a, a; one bar b, and
two bolts e, e, are used and fitted as before described, and of which Fig. 12
represents a vertical section.
Figs. 13 & 14 are illustrations of doors having the middle bars in a
vertical position and with the brick or fire lumps fitted accordingly, the whole
is fixed and held together precisely as before described and will require no
further description. In these two arrangements I dispense with the use of

page_text: bolts. Fig. 15 represents a vertical section of Fig. 14; Figs. 16 & 17
represent fireproof doors having no middle bars other than the bolts e, e,
which in this example are disposed vertically so as to cross the horizontal
junctions of the fireproof material. Instead of mounting these doors,
shutters, or other articles on rollers as represented, provision may be made
in the framing for securing hinges or the necessary parts of hinges thereto
according to the purpose to which they are to be applied.
Having described the nature of my Invention and the manner of performing
the same, I declare that what I claim as my Invention to be protected by
the herein-before in part recited Letters Patent, is, the construction of doors,
gates, and shutters, as herein-before described, and in particular their appli-
cation to fireproof buildings or otherwise for fireproof purposes.
In witness whereof, I, the said William Stratford Hogg, have here-
unto set my hand and seal, this Seventh day of February, in the
year of our Lord One thousand eight hundred and sixty-two.
WILLIAM STRATFORD HOGG. (L.S.)
Witness,
W. CLARK,
Patent Agent,
53, Chancery Lane, London.