Improvements in Door and other Locks.
Year: 1889

page_text: COMPLETE SPECIFICATION.
Improvements in Door and other Locks.
I, NIELS GEORG SÖRENSEN, of Stockholm in the Kingdom of Sweden, Merchant
do hereby declare the nature of the said 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 a lock in which the bolt is actuated entirely by its own
weight.
The improved lock is shown in Figures 1 to 6 of tho accompanying drawing
adapted as a door lock and in Figures 7 to 10 as a drawer-lock but it is evident that it
also may be used for other purposes.
In the said drawing
Figure 1 is a vertical section of the lock arranged perpendicularly against the door,
into which it is insorted.
Figure 2 is a view of the lock and its bolt-cap taken from the right side Figure 3.
Figuro 3 is a vertical section parallel with the door.
Figures 4 and 5 are horizontal sections of Figures 1 and 3 respectively.
Figure 6 is a modification.
The lock comprises a case or shell & provided with latticed or even side or sides or only
partial walls or sides. In the said casing is enclosed a bolt h which is adapted to move
freely up and down some distance which distance is determined by a stud or pin p fixed
in the bolt and moving up and down in a slot or groove in the casing b. The bolt and the
shell may be of any convenient section. Moreover the casing and the bolt may he
made straight or curved in their longitudinal direction and be applied vertically or in
an inclined position, provided the bolt under the influence of its own weight be free
and movable in the said casing, allowing it both to be dropped down in the cap and to
be raised by external force.
The lock itself or the main part of it is inserted in one of the doors, whereas on the
other door, or if there be only one door, in the door frame is fixed a bolt-cap c so
disposed that when the doors are closed or brought in such position to each other that
the bolt comes exactly over the cap, it will drop into the said cap, thus locking the
door or doors. To facilitate the gliding of the bolt into the cap an inclined plane is
made on the latter on the side corresponding to the way which the doors opens. The
bolt itself may at its lower end be cut square, bevelled or of any other suitable shape.
In order that the bolt may be raised, when the door is to be opened, there is in the
door behind the bolt-case a lever e provided with a spindle and handles attached to the
same on the outside of the door as shown on the drawing. The free end of the said
lever e enters a slot in the casing and acts when the door is to be opened on the upper
edge of a notch in the bolt to lift the same. In order to counterbalance the weight of
the handle it is convenient to enlarge the lever e so that it will act as a counter-weight
as shown in Figures 3 and 5.
Figures 7 to 10 shows the improved lock adapted to a drawer. This arrangement
will be easily understood by reference to the drawing and is besides similar to that
already described with the exception that the unlocking is effected by a key in lieu of
a handle. The arrangement of the lock for using a key and also the key itself are
distinctly shown in Figures 7, 8 and 9.
It is evident that the bolt-cap c may also be made without the inclined plane aforesaid
for instance with an horizontal plane or even simply with an edge. The bolt h must
in such case always be bevelled at its lower end, so as to be able to glide up and pass
over the bolt-cap. Such a modified arrangement is shown in Figure 6.
It is evident that, instead of the bolt-cap shown, a simple plate provided with an
aperture in which the bolt may fall down, can be used.

page_text: In Figures 1 to 5 the lock is shown. arranged to be placed in the door from one side
but it is ovident that the lock can also be adapted to be placed in the door's edge as n
mortise lock. This construction of the lock is shown in Figures 11 to 14 of which
Figures 11, 12 and 14 show the same views and se-tions of the lock as those represented
by Figures 2, 3, and 5. Figure 18 shows the lock as seen from above. This modifi-
cation differs from that above described only in its construction as a mortise lock.
The lock is shown in Figures 11 to 11 provided with an iron piece R bent so as to fit
on the door, embracing it in such a way as to securely hold the lock and constituting
a safe ground for the key-hole shutter.
Having now particularly described and ascertained the nature of the said inven-
tion and in what manner the same is to be performed declare that what I
claim is:
A lock consisting of a shell or casing with solid or latticed walls, in which is freely
moved and guided vertically or in an inclined direction a bolt, the downward motion
of which is effected by gravity and determined by a pin or stud entering into a slot
or groove in the shell and of a cap provided with an inclineal or horizontal plan or
only with an edge adapted for the bevelled bolt to slide upon which cap being fixed on
the corresponding door or other part to be locked has for its object to receive the
bolt.
Din in th Ja
HASELTINE, LAKE & Co.,
45, Southampton Buildings, London. W.C., Agents for the Applicant.