IMPROVEMENTS IN THE DESCRIPTION OF HINGES DENOMINATED CONCEALED HINGES, FOR CARRIAGE. DOORS AND DOORS OF EVERY DESCRIPTION."
Year: 1856

page_text: LETTERS PATENT to Henry Edward Brown, of No. 2, Summer Street
North, in the City of Dublin, for the Invention of "IMPROVEMENTS IN
THE DESCRIPTION OF HINGES DENOMINATED CONCEALED HINGES, FOR CARRIAGE.
DOORS AND DOORS OF EVERY DESCRIPTION."
PROVISIONAL SPECIFICATION left by the said Henry Edward Brown at
the Office of the Commissioners of Patents, with his Petition, on the
2nd May 1856.
I, HENRY EDWARD BROWN, of No. Two, Summer Street North, in the City
of. Dublin, do hereby declare the nature of the said Invention for "IMPROVE-
MENTS IN THE DESCRIPTION OF HINGES DENOMINATED CONCEALED HINGES, FOR
CARRIAGE DOORS AND DOORS OF EVERY DESCRIPTION," to be as follows:-
My Invention consists in such an alteration in the construction of concealed
hinges as will enable a carriage door or other description of door to be unhung
without removing the hinges from the pillars or door frames, by the adaptation
of a shifting plate of metal, which may be recessed to slide on a tongue, or
projection, or dovetail, or on a plate or plates thereof, formed on the hinge,
either vertically or horizontally in front, the plates and dovetailed front of the
hinge being connected by a screw; or the front part of the hinge may be
recessed, and the plates tongued or dovetailed at the top, head, or back thereof,

page_text: and both plate and dovetail, or dovetailed plate and recessed front, united as
.aforesaid, may be made attachable to doors with wood, screws of iron or brass,
or bolts and nuts, or other suitable mode of fastening.
SPECIFICATION in pursuance of the conditions of the Letters Patent, filed
by the said Henry Edward Brown in the Great Seal Patent Office on the
30th October 1856.
TO ALL TO WHOM THESE PRESENTS SHALL COME, I, HENRY
EDWARD BROWN, of No. Two, Summer Street North, in the City of Dublin,
send greeting.
WHEREAS Her most Excellent Majesty Queen Victoria, by Her Letters
Patent, bearing date the Second day of May, in the year of our Lord One
thousand eight hundred and fifty-six, in the nineteenth year of Her reign,
did, for Herself, Her heirs and successors, give and grant unto me, the said
Henry Edward Brown, Her special licence that I, the said Henry Edward
Brown, my executors, administrators, and assigns, or such others as I, the
said Henry Edward Brown, 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 Man, an Invention for "IMPROVE-
MENTS IN THE DESCRIPTION OF HINGES DENOMINATED CONCEALED HINGES, FOR
CARRIAGE DOORS AND DOORS OF EVERY DESCRIPTION," upon the condition (amongst
others) that I, the said Henry Edward Brown, my executors or administrators,
by an instrument in writing under my, or their, or one of their hands and
seals, should particularly describe and ascertain the nature of the said Inven-
tion, 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.
.
NOW KNOW YE, that I, the said Henry Edward Brown, do hereby declare
the nature of the said Invention, and in what manner the same is to be per-
formed, to be particularly described and ascertained in and by the following
statement thereof, that is to say:-
My said Invention has for its object the arrangement of the hinge in such
a manner, that the carriage or other door with which the said hinges, are used
may be unbung or taken off its hinges without removing either that part of
the hinge attached to the door, or that part attached to the door, pillar, or
frame.

page_text: .
In carrying my Invention into effect, I construct a plate having in it. a
recess into which the end of the arm of the hinge engages, the said recess
and arm of the hinge constituting a dovetail joint, as herein-after further
explained, and illustrated in the accompanying Drawing. The hinge is
attached to the door frame or door, and the plate with the recess is attached
to the door or door frame, and by causing the end of the arm of the hinge to.
engage in the said plate the door and door frame become connected together.
Figure 1 of the accompanying Drawing represents, in plan, the two partš
of which one of my improved hinges is composed; Figure 2 represents a
front view of the same, the parts being represented separate in both Figures;
and Figure 3 represents my improved hinge in elevation, the two parts of
which it is composed being engaged together, and all the parts being in the
positions which they respectively occupy when the door is opened at right
angles to the door frame. The same letters indicate the same parts in the
several Figures.
a is the hinge, attached to the door frame by screws passing through the
holes c, c; is the plate, attached to the edge of the door by screws passing
through the holes d, d; e is the arm of the hinge, turning upon the centre f.
The end of the arm e is terminated by the plate g, which has the form repre-
sented in the several Figures. The plate b has a recess h, which is the exact
counterpart of the plate g, and when the plate g is inserted in the recess h,
and fixed therein by a screw i (Figure 3), the plate 6 is securely attached to
the hinge a. In order to remove the door from its hinge, it is only necessary
to remove the screw i, when the dovetal g can be withdrawn from the recess h,
and the door detached from the door frame.
Although for convenience of description I have spoken only of one hinge,
yet two or more hinges, such as I have described, are required for each door.
Although I prefer to place the dovetail joint, which constitutes the essence
of my Invention, in a horizontal plane, yet the same may be placed vertically
with the same or nearly the same effect.
Having now described the nature of my said Invention, and the manner of
carrying the same into effect, I wish it to be understood that I do not limit
myself to the precise details herein described and represented, as the same
may be varied without departing from the nature of my said Invention; but
I claim as my Invention the improvements in concealed hinges for carriage
and other doors, herein-before described, and illustrated in the accompanying
Drawing, that is to say, connecting the parts of the said hinges attached
respectively to the door and door frame by means of slide and dovetail junctions,

page_text: whether the said slide or dovetail junctions be situated vertically, horizontally,
or in any other position.
In witness whereof, I, the said Henry Edward Brown, have hereunto set
my hand and seal, this Twenty-seventh day of October, in the year of
our Lord One thousand eight hundred and fifty-six.
Witness,
HENRY CORLETT.
HENRY EDWARD BROWN. (L.S.)