Year: 1897

page_text: I, TIBURCE DUBOIS, of 3, Place de Brouckere, Brussels, Belgium, Merchant, do.
hereby declare the nature of this invention to be as follows:-
The present invention consists of a safety apparatus characterized by the adjunc-
tion to the ordinary lock of any kind whatever and in a way absolutely independent
of this lock of a bolt placed behind the lock, in the interior of the house or
apartment; this bolt cominands a series of other bolts distributed around the door,
it is worked by a small shutter fixed invariably to the end of the ordinary key or
forged to it.
The apparatus is composed of an iron or steel plate applied to the door, on the
inside of the lock; to this plate are rivetted two other sheet-plates forming a slide
behind it and receiving, in the horizontal space, which separates them, a bolt which
slides horizontally and guided in its horizontal movement by a small button or
knob rivetted to the first plate and sliding in a groove made in the bolt. This
latter part at its lower extremity, is cut so as to present two grooves of an appro-
priate form to receive a pressure by each revolution of a shutter turning with the
key; at its extreme end, the bolt is put into.connection with two or several stems
commanding properly so-called bolts, distributed ad libitum around the door; the
motive bolt when pushed in the direction required, puts into movement all the
stems and the bolts which depend upon this and which being pushed into their
respective catchies, assure the proper closing of the door, even if, with the ordinary
key, we put the ordinary lock in an open position, the safety lock being absolutely
independent of the ordinary locks.
A semi-circular groove, made in the first plate, allows the introduction of the
instrument intended to move the motive bolt; this instrument is made with a small
shutter fixed invariably to the end of the ordinary key or forged to it; when this
key is not provided with the small shutter it cannot reach the safety organs placed
behind the lock and the door cannot open; when the key is provided with its
supplementary shutter, it throws out of gear all the safety bolts at the same time
as it opens the ordinary lock and, consequently, the door can be opened.
Thatod this 24th day of Jung 1897

page_text: 1
performed to be particularly described and ascertained' in and by the following
statement:-
The present invention concerns a safety contrivance applicable to all doors and
preventing their being opened, even from the inside, when the principal bolt is
not worked by means of a special key.
If
--
"
In the annexed drawing, forms of construction of this contrivance are shown
by way of example.
Fig. 1 is an outside view of an ordinary lock.
Fig. 2 shows the same lock to which the principal bolt of the safety contrivanco
is fixed.
Fig. 3 represents a bolt fixed on a special plate instead of on the lock.
Fig. 4 is a vertical section on line X X of Fig. 3.,
Fig. 5 is an outside view of the covering plate.
Fig. 6 shows a modification of the lock with a bolt provided with a safety_wedg-
ing apparatus.
Fig. 7 is a broken section on line X Y of Fig. 6.
Fig. 8 shows an ordinary lock-key.
2477
Fig. 9 shows the same key to which the bit which serves to move the bolt is
forged.
2
12
+
id p
? M
. 1
Fig. 10 shows a door provided with a safety-lock and with working contrivances
of the ordinary bolts moved by, the principal bolt.
This safety arrangement is composed essentially of a bolt E which we shall call
motive bolt, of connection rods K with levers W and with bolts V₁ worked by the
said motive bolt by means of the said connection rods.
.
The motive bolt E slides horizontally and is guided in this horizontal movement
by a small pin fixed in a groove t of the bolt. The button F is rivetted eithor
to the lock as shown in Fig. 2, if the bolt is applied directly to the lock, or to a
special plate in sheet-iron applied to the door, on the inside and in this latter case
plates in sheet-iron are rivetted on the special plate and form a slide for the
bolt; in both cases, the movement of the bolt is entirely independent of the lock.
The bolt E has a suitably shaped notch H at its lower part to receive, the thrust
of a bit L connected or forged with the end of the key of the lock and turning con-
sequently with this key. At its outside extremity the bolt E istconnected with a
rod K working directly or through the intermediary of levers W, slides Z'and
rods Ki, the ordinary bolts distributed over the periphery of the door and penetrat-
ing into as many corresponding, staples. The motive bolt, being pushed in the
direction required, puts all the rods K' and their bolts in movement, and the latter
secure the absolute shutting of the door, even after putting the lock in its opening
position with an ordinary key, the working bolt being absolutely independent of
the lock and can only be worked by a key having a bit L at its end.
A projection in the form of an arc of a circle M the curve of which has the same
centre as the key-hole is applied above this hole to prevent the safety-lock from
being picked.
Fig. 6 shows a different contrivance of the motive bolt described above; with
this bolt, the bolt E fixed on the lock is also guided in its horizontal' movement by 4
means of the groove t and of the pin F rivetted to the lock; to this bolt are fixed
the rods A shown by full lines in Fig. 6 and by dotted lines in Fig. 10; these rods
are provided with ordinary bolts B.
Upon the bolt E, and guided in two slides gg fixed at h¹ to the lock so as to
allow the bolt the liberty of sliding on this lock, is fixed a plate Q provided with a 5
notched groove in the notches of which a button i rivetted to the bolt engages
and prevents this latter from moving... WHICH 197
A spring fitted to the lock and pressing against the upper part of the plate Q,
holds this latter against the button i.
The plate has an extension ; to which is
which the end of a threaded rod m is screwed.
fixed a small tapped socket.p into 5
This rod passes through the upper

page_text: side of the lock by an opening o in the shape shown in Fig. 7; at its upper part it
has a knob k; the rod has also a pin n. In the position indicated in Fig. 6 the
plate being in its lowest position, the pin which has passed through the opening o
is on the inside of the lock; the bolt E cannot be displaced even with the key pro-
vided with the bit L; to allow the working of this bolt E, the knob & is pulled
upwards, the pin na leaves the lock, a quarter of a turn is given to the knob k; the
pin rests on the side of the lock as shown in Fig. 7; the button i is disengaged
and the groove of the plate Q then allows the displacing of the bolt E.
When the operation is made the rod is put back into its first position by giving
it a turn: the spring brings the plate back into the wedging position and it
again becomes impossible to move the bolt E.
By unscrewing the rod completely out of the socket pit can be removed; the
perfect fixity of the safety organs in the position they are placed, is thus secured.
-
Having now particularly described and ascertained the nature of my said
invention and in what manner the same is to be performed, I declare that what.
I claim is:
1) In a safety-lock the combination with an ordinary lock of a motive bolt dis-
tinguished by a bolt provided with a longitudinal groove in which a pin rivetted
on the ordinary lock or on a special plate can slide; the said special plate bearing
also sheet-iron plates rivetted and forming slides, the said bolt being provided
with a groove at its lower part to receive the bit connected with the ordinary key,
and the working of the said motive bolt being entirely independent of that of the
ordinary lock.
2) In a safety-lock claimed in 1) the combination with the bolt, of rigid or
articulated' rods in connection with ordinary bolts arranged on the periphery of
the door, the said rods being intended to transmit to these bolts, the movement
transmitted by the motive bolt.
3) In a safety-lock claimed in 1) the combination with the key of the ordinary
lock, of a bit fixed rigidly to the extremity of the key or forged with it, the object
of the said bit being to work the motive bolt which cannot be moved with an
ordinary key.
:
4) In a safety-lock claimed in 1) the addition of a curved projection above
the key-hole, with the object of preventing the picking of the safety motive-bolt.
5) In a safety-look claimed in 1) the combination with the motive bolt, of a
plate having a longitudinal groove, guided by vertical slides fixed to the lock and
held by means of a spring, in its lowest position to wedge a pin rivetted to the bolt,
with the object of preventing the working of this bolt, even by employing the key
provided with its bit, the stop plate being pulled upwards by means of a rod with
knob, thus allowing the free play of the bolt by means of the bit-key.
6) In a safety-lock claimed in 1) the combination with the motive-bolt, of a
vertical rod connected with ordinary bolts which enter their respective staple
through a very restricted lateral displacement of the motive bolt.
7) A safety-look substantially as described and shown.
T11
n
L. DUVINAGE,
Patent Agent, 8, Rue des Princes, Brussels, Belgium. ·