An Improved Device for Use in connection with Door-locks to Facilitate the. Opening of the Door and to Give Notice of such .Opening.
Year: 1895

page_text: Date of Application, 17th Sept., 1895-Accepted, 16th Nov., 1895
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COMPLETE SPECIFICATION.
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17.
An Improved Device for Use in connection with Door-locks to
Facilitate the. Opening of the Door and to Give Notice of such
.Opening.
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We, JOHANN NEUKIRCHEN, Technologist, and Josef WASSENBERG,
Merchant, both. of No.. 23. Friesenplatz, Cologne on the Rhine, in the German
Empire, 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 and this
By the invention licrèin described we afford the means whereby, whilst a door
can be thoroughly and securely fastened, it can, when necessary, be easily opened
from the outside or inside, and warning will be given each time such door is
opened. For this purpose we employ two boltsolying one beside the other, which
can be moved relatively to each other by means of a double incline or wedge so as
to push back the latch-bolt of the door lock, at the same time leaving a free
passage for the same,, any opening of the door without moving the said wedge
ing entirely prevented.
The said device.is.shown in the accompanying drawing in which
Figure 1-is. an elevation of one side, of the device.
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Figure 2 is a front elevation with the bell or gong removed.
Figure 3 is an elevation of the other side of the said device,
Figure 4 is a rear elevation, and
Figure 5 is a section on the line a, a, Figure 4.
The handle a, which projects beyond the outer casing, passes through the wall
of the said casing and is connected on the inside to the rod 6 and is free to move
up and down in a slot in the said wall. This handle may, if desired, be operated
from any convenient position by means of a connecting wire. The rod b is
provided at its lower end with a double incline or wedge b', which engages with
suitable surfaces or shoulders formed on the two bolts c, c'. These parts are acted
on by the springs f,fo which continually tend to hold them in or bring them back
to the position shown in Figures 4 and 5. The rod b is connected to the hammer
of a bell or gong k by means of a pin d passing through a second slot in the casing,
so that each time the rod is raised, the gong sounds.
In the accompanying drawing, the door-opener is shown like a mortise-lock, and
comprises two bolts c, c' lying one beside the other; whilst behind the bolt c lies
the latch-bolt of the door-lock or second part of the combined lock, and the second
bolt presses against the said latch-bolt and forces it back in opening the door-
lock, Figure 5.
In order to open the door-lock, the rod b is raised by the handle a. By means
of the double incline or wedge b, the bolt c is pushed back and the bolt cl
simultaneously pushed forward so as to force back and release the latch-bolt and
so permit the opening of the door.
The lock can also be opened by means of a handle e and a key, the handle e
being provided inside and the key-hole outside the door, so that a tenant of the
floor or the like can immediately unlock it.
For this purpose a double lever e' is provided on the arbor of the handle e in
the interior of the lock, one arm of the said lever pressing against the double
incline or wedge 6' when the handle is turned, raising the said wedge and thus
moving the bolts. The second arm of the lever e¹ bears against a fixed stop so

page_text: that the lever can be turned in one direction only. To engage with the key a
projection is provided on the rod b, against which the bit or beard of the key
comes when it is turned, and which is raised together with the wedge b¹. Without
moving the rod.b and wedge b' it is impossible to open the lock.
By means of the springs f, fo, and f' the several parts are brought back again
to their original positions.
Instead of being used with mortise locks, the arrangement can, if desired, be
used with other kinds of locks.
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Having now particularly described and ascertained the nature of our said inven-
tion and in what manner the same is to be performed we declare that what we
claim is :-
First. A door-opener comprising two bolts lying one beside the other, one of
which bolts bears against the latch-bolt of the door or other lock, and the other of
which lies beside the said latch-bolt, the said two bolts being simultaneously
operated by means of a double incline or wedge, for the purposes above specified.
Second. The improved device constructed substantially as described with
reference to the accompanying drawing, and operating as and for the purposes
specified.
Dated the 17th day of September 1895.
D. YOUNG & Co.,
11 & 12 Southampton Buildings, London, W.C.,
Agents for the Applicants.