AN IMPROVEMENT UPON DOORS, WHEREBY THE DOOR SHUTS OF ITSELF, AND WITHOUT NOISE OR SOUND, AND WHEREBY WIND IS EXCLUDED FROM THE ROOM
Year: 1796

page_text: TO ALL TO WHOM THESE PRESENTS SHALL COME, I, WILLIAM
JACKSON, of Shire Lane, Temple Bar, in the Parish of Saint Clement Danes,
in the County of Middlesex, Smith, send sending.
WHEREAS His, most Excellent Majesty King George the Third, by His
Letters Patent under the Great Seal of Great Britain, bearing date at West-
minster, the Fifth day of December, in the thirty-seventh year of His said
Majesty's reign, did give and grant unto me, the said William Jackson, His
especial licence, full power, sole privilege and authority, that I, the said
William Jackson, my exors, adñors, and assigns, should and lawfully might,
during the term of years therein expressed, make, use, execute,"
and vend,
throughout that part of His Majesty's Dominion of Great Britain called
England, the Dominion of Wales, and Town of Berwick-upon-Tweed, my
Invention, that is to say, viz':-" AN IMPROVEMENT UPON DOORS, WHEREBY THE
DOOR SHUTS OF ITSELF, AND WITHOUT NOISE OR SOUND, AND WHEREBY WIND IS
EXCLUDED FROM THE ROOM;" in which said recited Letters Patent is contained a
proviso, obliging me, the said William Jackson, by writing under my hand and
seal, to cause a particular description of the nature of my said Invention, and
in what manner the same is to be performed, to be inrolled in His Majesty's
High Court of Chancery within one calendar month next after the date of the
said recited Letters Patent, as in and by the said Letters Patent and the
Statute in that behalf made, relation being thereunto had, may more at large
appear.
NOW KNOW YE, that in compliance with the said proviso, and in pursuance
of the said Statute, I, the said William Jackson, do hereby declare that my
said Invention (that is to say), An Improvement upon Doors, whereby the Door

page_text: Shuts of Itself, and without Noise or Sound, and whereby Wind is Excluded
from the Room, is described and ascertained in manner and form following,
that is to say :-
It consists, as to such part of the Invention whereby the door shuts of itself,
of a hinge affixed to the lower part of the door, in the usual part where the
lower hinge of a door is fixed. The hinge is divided into two parts. The first
part of the hinge of the door is fixed upon the stile of the door, and is described
in the Drawing hereunto annexed, No. 1. The other part of the hingo is fixed
in an opposite direction to the rabitted jamb of the door, and is described by
the Drawing hereunto annexed, No. 2. The holes in the hinge, made to
receive the spindle hereafter mentioned, are proper width and shapo for that
purpose; upon the sill or foot of the door and underneath the hinge is fixed an
iron plate horizontally, which is fastened on with screws, and underneath this
plate is a bed in the sill or foot of the door to receive the spring and spindle
herein-after described. The spindle which runs into the hinge extends to
the iron plate in a direct line with the hinge, and is carried through
the plate and connected with the spring under the plate in manner herein-
after mentioned. The form and shape of this spindle is described in the
Drawing hereunto annexed, marked No. 3. The spring is fixed upon the iron
plate and underneath the same, in the form described in the Drawing
hereunto annexed, No. 4. At the end of the spring, and in order to con-
pect the same with a swivel, is a hook or catch, as explained in said Drawing,
No. 4. At the end of the spindle, under the iron plate, is fixed a tumbler, in
the shape of the Drawing hereunto annexed, No. 5. This tumbler is connected
by a swivel with the spring, and which swivel is described by the Drawing
hereunto annexed, marked No.. G. The whole of the spring, the lower part of.
the spindle, the tumbler, and the swivel, are more particularly explained at one
view by the Drawing hereunto annexed, marked No. 7. The spindle being in
its shape square as to part thereof introduced into the hinge, as described in
the Drawing of such spindle, marked 3, necessarily, when the door opens, acts
upon the spring underneath the iron plate, and, when the door is opened, such
spring, by acting upon the spindle, shuts the same without assistance. The
binge above mentioned is not absolutely necessary, inasmuch as a narrow, flat
piece of iron, of the length of the spindle, being screwed upon the door, and
the end thereof next the sill being rounded and let into the iron plate upon
the sill, and connected with the spring in like manner as the spindle is con-
nected, will havo the same effect, and answer the like purpose.
In respect to that part of the Invention which prevents noise upon shutting
of cloors: It consists of a plate of iron about four inches in length, and about
two in breadth, screwed upon the jamb of the door. A spring is fixed under-
:

page_text: neath this iron plate, and a bed is made in the jamb to receive such spring,
and which spring is explained by the Drawing hereunto annexed; marked A..
The square in the said Drawing is an open space. On the rabitted jamb of the
door, and which is loose, is fixed, an iron plate of about an inch square, and a
small part or flap thereof is carried through the aforesaid aperture, and returned
and connected by a swivel with the spring; and which: iron plate of an inch
square forms the outside of the plate marked A, and is described in the Drawing
hereunto annexed, marked B. The pressure of the door upon the small plate,
according to the Drawing marked B, occasions such plate to fall back or recede,
but it immediately returns, and thus noise is prevented by the shutting of doors..
In respect to that part of the Invention which excludes wind from the room,
a small plate of iron, of about two inches in length, and about one inch in
breadth, is fixed upon the stile of the door, under the lower hinge, and which
plate appears in the Drawing hereunto annexed, marked (C). On the inside
of this plate is a joint, marked F, rivetted to the plate to receive the lever
marked D; a pin is carried through the plate and jointed to the short end of
the lever marked E. The lever runs from joint E to joint F, and then pro-
ceeds, running horizontally, to the point G. A spring is rivetted to the plate,
as marked H, and hangs on the lever at joint F. There is a wooden flap for
the door in order to fill up the vacant space, and which is hung at the bottom
of the door by hinges; upon this plate is fastened, by screws, a small plate of
iron, from which projects a joint, and to which joint a small pin or plate is
fixed, which runs into a groove; into this small plate or pin the point of the
lever marked G runs, whereby, when the door opens, the flap rises, and upon
the shutts of the door, the flap falls and fills up the vacant space thereof. The
small plate fixed upon the flap of the door, together with the joint thereon,
and the plate or pin which receives the point of the lever marked G, are de-
scribed by the Drawing hereunto annexed, marked I.
In witness whereof, I, the said William Jackson, have hereunto set my
hand and seal, this Fourth day of January, One thousand seven

page_text: AND BE IT REMEMBERED, that on the Fourth day of January, in the
year of our Lord 1797, the aforesaid William Jackson came before our
said Lord the King in His Chancery, and acknowledged the Specification
aforesaid, and all and every thing therein contained and specified, in form
above written. And also the Specification aforesaid was stampt according to
the tenor of the Statutes made for that purposo.
Inrolled the Fourth day of January, in the year of our Lord Ono
thousand seven hundred and ninety-seven.