An Improved Door Hinge.
Year: 1899

page_text: PROVISIONAL SPECIFICATION.
An Improved Door Hinge.
We, CHARLES PORTER, of 43, South Hill Road, Gravesend, in the County of
Kent, Carpenter, and FREDERIC DANE BISHOP, of 130, Wrotham Road,
Gravesend, aforesaid, Licensed Victualler, do hereby declare the nature of this
invention to be as follows:
This invention relates to door hinges and has for objects, first, to provide means
whereby a door may be so hung that the full width between the side jambs of
the doorway is rendered available as a passage-way when the door itself is opened
only so far as to occupy a position at right angles with the closed position;
and, secondly, to facilitate the mounting and dismounting of doors.
The invention which (particularly as regards the first of these objects) is
especially applicable to doors such as entrance doors of houses, doors interposed
in the length of passages and the like, and generally to doors whose situation
precludes their being opened so far as to lie back in a plane parallel to that
which they occupy when closed, is designed with a view to meet the difficulty
commonly experienced in moving bulky articles of furniture when, as often
happens, the curtailment of the doorway aperture by the door itself when opened
to the fullest practicable extent, necessitates the dismounting of the door in order
to give passage to the article which it is desired to transport.
The invention consists essentially of a hinge whose pivotal axis is placed, not
as usual in the plane dividing the meeting edges of the door-frame and stile
when the door is closed, but within the jamb of the door frame, at a distance from
the inner face of the jamb equal to not less than one half the thickness of the
door, so that the door when opened by an angular movement of 90° about the
hinge is caused to assume a position in which its edge is entirely masked by the
jamb, the space between the. two jambs of the frame being consequently left
perfectly clear.
The improved hinge comprises two members whereof the one attached to the
door consists of a plate sunk in the edge of the stile and supporting an arm
which projects in the plane of the door and carries a downwardly projecting
pintle fixed to the arm at a distance from the edge of the door equal to not less
than one half the thickness of the door, but preferably somewhat more. The
other member of the hinge is attached to the jamb and consists of an angle plate
lapped around that corner of the jamb about which the door turns in opening.
this plate supporting, within the angle formed by its two sides, a horizontal
diaphragm which is provided with a vertical hole for the reception of the pintle
carried by the other member of the hinge. A slot to give passage to the arm
which carries the pintle, is cut horizontally in the two sides of the angle plate
so as to cross the angle between them just above the diaphragm. This slot being
extended upwardly at that end of it occupied by the arm when the door is open.
to a height rather greater than the combined depth of the arm and pintle, so
as to permit of the door when in the open position, being readily dismounted
after being lifted until the point of the pintle is clear of the hole in the diaphragm

page_text: It will be obvious that the relative positions of the pintle and of the hole
wherein it works might be reversed, the pintle instead of being attached to the
arm which projects from the edge of the door, being attached to and projecting
upwardly from the diaphragm carried by the angle plate fixed to the jamb, the
hole in which the pintle works being in this case formed in the arm which is
fixed to the door.
Dated this 22nd day of Sentember 1800
We, CHARLES PORTER, of 43, South Hill Road, Gravesend, in the County of
Kent, Carpenter, and FREDERIC DANE BISHOP, of 130, Wrotham Road,
Gravesend, in the County of Kent, Licensed Victuailer, 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 hinges and has for its principal object to avoid the
partial obstruction of the doorway by the edge of the door and so render the
full width between the jambs available as a passage-way when the door itself
is opened only at a or little more than a right angle to its closed position.
The invention is especially applicable to entrance doors of houses doors inter-
posed in the length of passages and the like, and generally where the situation
of the adjacent side wall is such as to limit the swinging back of the door suffi-
ciently to remove it wholly out of the way so as to give passage to bulky articles
of furniture and so avoid the necessity of dismounting the door in consequence
of the obstruction of the doorway aperture by the door or the door handle when
the door is opened to the fullest practicable extent.
The invention will be described with reference to the accompanying drawings
forming part of this specification wherein Figure 1 is an inside face view of the
hinge part of the door being broken away. Figure 2 is a sectional plan view
of the hinge, the open position of the door being indicated by dotted lines.
Figure 3 is a side view of the one member of the hinge. Figures 4 and 5 are
face views of the other member of the hinge and Figure 6 is a perspective view
thereof.
The invention consists essentially of a hinge whose pivotal axis is situated
at some distance within (instead of at or beyond) the angle of the jamb so that
when the door is fully opened it will be entirely clear of the doorway, its hinge
edge being masked by the jamb.
The improved hinge comprises two members A B whereof the one A is attached
to the door C and consists of an arm a carried by a plate b which is fixed to and
countersunk in the edge of the door and is provided with a downwardly projecting
pintle c. The other member B of the hinge is attached to the jamb D and con-
sists of an angle plate d d embracing the angle of the jamb and provided within
the angle formed by its two members dd with a bearing of backet piece e having
a vertical hole f for the reception of the pintle c. A slot g to give passage to
the arm a is cut transversely in the two members d d of the angle plate so as to
cross the corner or angle made by them, this slot being extended upwardly at g¹
in the member d¹ sufficiently to permit of the arm and pintle being readily in-
serted in or removed from the bearing so as to admit of the door being readily
hung or dismounted.

page_text: It will be obvious that the relative positions of the pintle c and of the hole f
might be reversed, the pintle in that case projecting upwardly from the bracket
piece e of the angle plate and the hole in which it works being formed in the
arm a.
For ordinary hinges the slot would be horizontal but it will be obvious that
by giving it an upward inclination the action will be similar to that of a rising
hinge.
In order to enable the door to make a close joint with the jamb when closed,
and to clear the angle of the jamb when opening the edge of the door is hollowed
as shown to a curve struck from the axis of the pintle at the radius of the corner
of the jamb which is preferably slightly rounded or beaded.
The effective radius of the arm must be at least equal to half the thickness of
the door in order that the edge of the latter shall be wholly masked by the jamb
when the door is opened at a right angle, but it is preferable that the effective
radius of the arm should somewhat exceed this length and that the pivotal axis
should be somewhat nearer the face than the face y in order that the door may
be opened to an extent rather greater than a right angle as shown in dotted
lines in figure.
Having now particularly described and ascertained the nature of the said in-
vention and in what manner the same is to be performed we declare that what
we claim is :-
A door hinge whose members consist respectively of an arm projecting from
the door and a transversely slotted angle plate embracing the corner of the jamb,
the arm being pivoted within the angle made by the two members of the angle
plate, substantially as and for the purpose specified.
Dated this 22nd day of June 1900.
A. M. & WM. CLARK,
Chartered Patent Agents, 53, Chancery Lane, London.