Door Hinges and Locks Constructed and Arranged for Opening the Door at Either Side.
Year: 1896

page_text: Date of Application, 18th June, 1896
Complete Specification Left, 17th Mar., 1897-Accepted, 17th Apr., 1897
PROVISIONAL SPECIFICATION.
Door Hinges and Locks Constructed and Arranged for Opening the
Door at Either Side.
I, LEO FRIEDRICH-HERRMANN, of No. 13 Kärnthnerring, Vienna I, Professor,
do hereby declare the nature of this invention to be as follows:-
This invention relates to the construction and arrangement of hinges and locks
at both sides of a door in such a manner that the door can be opened at either
side. For this purpose, each of the two hinges at each side of the door consists
of a part fixed to the door jamb having a socket for the reception of a pivot
projecting down from a part which is fitted to slide vertically on the door and
which is attached to a vertical rod urged downwards by a spring, this rod having
the pivot parts of both the upper and lower hinges attached to it. At each side
of the door there is a lock with a handle, on the axis of which is an arm which:
enters a slot in the vertical rod above mentioned.
When it is desired to open the door, say on the right hand side, the lock handle.
at that side is pushed down raising the vertical rod and thus raising the two hinge.
pivots at that side out of the sockets. The door can then be opened, turning upon.
the hinge pivots at the left side of the door.
And in like manner, by depressing the handle of the left hand lock, the door
can be opened on the left side turning on the hinge pivots at the right side. In
order to prevent both handles from being depressed at the same time, vertical arms.
fixed on their axes are connected by a horizontal cross rod so that when either
handle is pushed down the other is necessarily raised, and thus only the hinge
pivots on the one side of the door can be disengaged from their sockets.
Either of the handles can be rendered inoperative by turning a spindle on which
there is a catch within the lock that meets a projection from the handle axis.
The hinges are also provided with safety catches which prevent the hinge pivots.
on the one side from being raised unless the door is completely closed at the other
side aud the pivots there in their sockets.
Dated this 18th day of June 1896.
ABEL & IMRAY,
Agents for the Applicant.
COMPLETE SPECIFICATION.
Door Hinges and Locks Constructed and Arranged for Opening the
Door at Either Side.
I, LEO FRIEDRICH-HERRMANN, of No. 13, Kärnthnerring Vienna I, Professor,
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 the construction and arrangement of hinges and locks
at both sides of a door in such a manner that the door can be opened at either side,

page_text: as I shall describe referring to the accompanying drawings which illustrate a car-
door arranged according to my invention.
Figure 1 shews an elevation of part of a door partly in section;
Figure 2 is a sectional plan;
Figure 3 is a cross section:
Figures 4 to 9 inclusive shew the left upper hinge and lock in several views.
Each door is provided with four hinges, two on each side of the door. As the
mechanism on each side of the door is the same, I shall describe that on one side
only. Each hinge consists of three parts, the socket piece a, fixed on the door
jamb, the guiding sleeve b attached to the door, and the hinge pivot d attached to.
arm c.
The arms c of the hinges on the one side of the door are fixed on a rod f which
slides in a groove in the door near the edge plate e.
The rod has a slot f¹ which receives an arm / projecting from the boss h¹ of
the lock, so that on pressing down the handle k, the rod f is lifted raising the
arms c, and the hinge pivots d, out of the sockets a, whereupon the door can be
turned about the pivots of the hinges on the other side.
After releasing the handle k the rod is pushed down by its weight and a
spring m which bears on the arm c. In order to make it unnecessary to move the
handle k in closing the door the socket piece a has a projecting incline n, on which,
as the door is closing, the hinge pivots d slide upward and finally snap into the
sockets when the door is quite closed.
In order to prevent disengagement of the hinges simultaneously on both sides of
the door as might happen if both handles were depressed at the same time, or if
the door were not quite closed, arms k¹ projecting from the bosses of both locks
are connected by a rod p arranged in a groove of the door so that when either
handle is pressed down the other handle is moved up, consequently both handles
cannot be depressed at the same time.
When the door is nearly closed, the hinge pivot is on the highest point of the
incline n, but has not snapped into the socket. The rod on this side being lifted
while the other rod is prevented from rising by the arm on that side being held
at the bottom of the slot in f, the handle on that side being thus held up, when the
door is not sufficiently closed for the snapping of the pivots into their sockets as
shewn by the full lines in Figure 7. Accident in this case is prevented as
follows: The upper socket piece a has pivotted on it at q' on its upper side a
snapping lever 2. It has a tooth q'. which engages in a recess of a disk r
(Figure 9) which is fixed to the arm or is integral therewith, on turning the door.
on its hinge, and so turning the disk r, the snapping lever q is turned towards the
position shewn in Figure 7 passing over an incline c' of the arm c thus preventing
it from being raised. In opening the door to the position shewn in Figure 7 by
dotted lines, the incline el passes under and escapes q and the raising of the hinge
pivot is thus prevented by the widened part of c entering a notch a before the
incline c', escapes 9.
The forward motion of q is limited by a pin s.
a bar fixed
To render derangement of the mechanism difficult, the spring, m, is placed in
a recess of the door covered by a plate t (Figure 8) which is integral with the
arm c. The lifting of the door from its hinges may be prevented by
close above it. In order that the door may be used as a one-sided door, each lock
is provided with a pawl n held in either of two positions by a spring u. When the
handle is turned up as shewn on the left in Figure 1 the pawl v engages under a
shoulder w, and prevents this from turning until the pawl be disengaged by turning
it to the position shewn on the right.
Having now particularly described and ascertained the nature of my said inven-
tion and in what manner the same is to be performed, 1 declare that what I
claim is:-
1. A door provided on each side with a lock and a pair of hinges the pivot pius

page_text: of which are connected by a vertical spring urged rod with an arm of the lock so
that by depressing the lock handle both pins are raised out of the sockets in which
they work, leaving the door free to be opened, turning on the hinges on the other-
side of the door, substantially as described.
2. The connection of arms of the two locks by a rod so that when the one lock
handle is depressed, the other is raised, substantially as and for the purpose set
forth.
3. In combination with the fixed socket piece a and the snapping lever g pivotted
thereon, the disc ŕ, the incline c', the notch a² and the widened part of the
arm e adapted to engage therein, for the purpose of preventing the hinge pivots at.
one side from being raised unless the door is quite closed at that side, substantially-
as described.
Dated this Seventeenth day of March 1897.
ABEL & IMRAY,
Agents for the Applicant...