A METHOD OR INVENTION OP AFFIXING AND HANGING CERTAIN SPRINGS, JOINTS, AND OTHER APPARATUS TO DOORS, BY MEANS WHEREOF SUCH DOORS MAY BE OPENED FROM EITHER JAMB
Year: 1802

page_text: TO ALL TO WHOM THESE PRESENTS SHALL COME, I, THOMAS
PRITTY, of Haughley, near Stow Market, in the County of Suffolk, Grocer
and Draper, send greeting.
WHEREAS His present most Excellent Majesty King George the Third,
in and by His Letters Patent under His Great Seal of the United Kingdom
of Great Britain and Ireland, bearing date at Westminster, the Twentieth day
of May, in the forty-second year of His reign, for Himself, His heirs and
successors, did give and grant unto me, the said Thomas Pritty, my executors,
administrators, and assigns, His especial licence, full power, sole privilege and
authority, that I, the said Thomas Pritty, my executors, administrators, and
assigns, and every of them, by myself and themselves, or by my and their
deputy or. deputies, servants or agents, or such others as I, the said Thomas
Pritty, my executors, administrators, or assigns, should at any time agree with,
and no others, from time to time and at all times thereafter during the term
of years therein expressed, should and lawfully might make, use, excreise, and
vend, within that part of His said Majesty's United Kingdom called England,
His Dominion of Wales, and Town of Berwick-upon-Tweed, my Invention of
"A METHOD OR INVENTION OP AFFIXING AND HANGING CERTAIN SPRINGS, JOINTS,
AND OTHER APPARATUS TO DOORS, BY MEANS WHEREOF SUCH DOORS MAY BE OPENED
FROM EITHER JAMB;" in which said Letters Patent there is contained a proviso,
obliging me, the said Thomas Pritty, by an instrument in writing under my

page_text: hand and seal, particularly to describe and ascertain the nature of my said
Invention, and in what manner the same is to be, and to cause the same to be
inrolled in His said Majesty's High Court of Chancery within one calendar
month next and immediately after the date of the said recited Letters Patent,
as in and by the same, relation being thereunto had, will more fully and at
large appear.
NOW KNOW YE, that in compliance with the said proviso, I, the said
Thomas Pritty, do hereby describe and ascertain the nature of my said Inven-
tion, and the manner in which the same is to be performed, by the Plan or
Drawing in the margin of these Presents, and as follows, that is to say:-
In Figure A is shewn a door hung complete, with dressings, and on each
side you see the projecting knuckle of the binge, which projecting knuckle is
varied so as to stand out more or less, as required for the opening of the door,
over the architraves, so that it may open completely back, or one hundred and
eighty degrees. In the middle rail of the door is shewn the balls of two
latches, which latches are concealed behind a brass or iron plate screwed flush
on the door stile, the. plate may either be painted or left as an ornament at
pleasure. By turning the ball nearer the edge, you mean to open the door;
the latch acts as a lever and raises. the sliding wire n, n, n, (to be described
hereafter) which is connected with pins o, o, and raises them out of that of the
hinge which is fast on the door, and immediately the door is free to open with
the same ease as a common door.
Figure B shews that part of the upper hinge which is screwed fast to the
edge of the door in the same manner as a common butt hinge. b, c, c, moves
in a dovetail in plate B to alter the projection of the knuckle in case the door
should twist or bend; the part is level with the plate B; c, c, is raised 2 or
3 eights of an inch above the plate B; the raised part c, c, slides into d with
a taper, and takes the weight of the door gradually as it closes to the jaumb
from which it was opened. This moving knuckle is made fast with a screw
at e to the plate B; but this will not always be necessary, therefore some of
the hinges will be made with the knuckle stedfast although of the same form.
C is that part of the hinge which is fixed on the jaumb, the sunk part dis
already described for receiving the raised part c, c. D represents that part of
bottom hinge which is screwed on the door, and is like a common butt hinge.
E is that part of the bottom hinge which lays exposed on the jaumb when the
door is opened; the upper parts of the joints C, E, above the red lines are
but one third of the thickness of the other part of the joint, to admit
the connecting part of the wire n, o, to play up and down freely and unseen,
as is shewn by the dotted line in part of the lower joint. F shews the reverse

page_text: side of E; this part of the hinge is one inch longer than the part D, to admit
the length of a trigger f, f, and spring behind it to force it forward, which
trigger is for the purpose of holding up the sliding wire n, n, n, or rather the
pins o, o, immediately on opening the door. In shutting the door the trigger
at fis struck by the knuckle of the hinge D when entering its proper place,
which forces the trigger back from under, the pin o; the wire n, n, n, imme-
diately falls, and the pins o, o, fall in their proper places and secure the joints.
H, H, is a piece of metal projecting from the common bead,; equal to the
knuckle of hinge, and is made concave to fit the bead, and is fixed to the
sliding wire n, n, n, by a plate of iron one inch wide at 9, and slides
up and
down in a mortice or cut, which is concealed by the length of the piece of
metal in front, under which is Figure I, shewing the projecting end of the
latch. Figure K is the latch at large, with the spindle through it for fixing
balls or rings for raising the latch. Figure L is a thin piece of metal, designed
to cover the tops of the joints and knuckles, pinned upward to.; the wooden
bead or jaumb lining the rabbate; 1 shews the, cavity for the sliding wire
n, n, n; M is a mortice plate of metal which forms part of the jaumb lining,
and is to admit the inch wide plate g to move up and down in; P is a strait
rod mitred at each end, with two notches resting on two rollers' r, r, above
the door; this rod moves to secure one side whilst the other is open, to prevent
the door from being thrown off the hinges; Q, Q, shew the upper end of the
wires n, n, n, (being two of them) one on each side the door, moving in a
groove in the jaumb linings. The rod P being too long to admit Q, Q, both
up or past it at same time, therefore, when the door opens on the left hand, Q
passes the rod P, and causes it to move on the rollers and over the mitre at Q
on the right hand, which prevents the possibility of Q on the
wire n, m, n, and pins o, o, rising out of the hinges on that side. The rod P
moves in groove concealed in the head of jaumb linings; t shews the inch
plate, as described in Figure H, H, at g; n, n, in this Figure is part of the
sliding wire n, n, n, which it was necessary to draw in sections for want of
room; S shews a notch in the pin o of lower hinge designed for the trigger
to catch in, in case the pin should not be raised high enough by the latch or
lever for trigger to be admitted under the end of the pin; I shews a con-
tinuation of the wires n, n, n, past the lower hinge, down and into the floor,
to move a rod underneath the door, similar to the rod P, where there is no
door head, which is intended for the same use as P, already described. Beads
(for different thicknesses of doors) for jaumb linings, ready grooved to suit the
wires n, n, n, and rod P, will be provided of dimensions to suit the hinges,
and sold with them. Chamber doors hung in this way may be made perfectly
right or the

page_text: secure by small pins passing through the projecting part of the knuckles to
prevent the pins o, o, being raised up.
In witness whereof, I, the said Thomas Pritty, have hereunto set my-
hand and seal, the Seventeenth day of June, in the forty-second year
of the reign of our Sovereign Lord George the Third, by the grace of
God of the United Kingdom of Great Britain and Ireland King,
Defender of the Faith, and in the year of our Lord One thousand
eight hundred and two.
xtraordinary in Chancery
AND BE IT REMEMBERED, that on the same Seventeenth day of June,
in the year above mentioned, the aforesaid Thomas Pritty came before our
Lord the King in His Chancery, and acknowledged the Specification afore-
said, and all and every thing therein contained, in form above written.
And also the Specification aforesaid was stamped according to the tenor of
the Statute in that case made and provided.
Talled the Dichtsouth day of Innn in the noon chain amitten