Safety Bolt-fastener.
Year: 1896

page_text: Date of Application, 1st Jan., 1896-Accepted, 1st Jan., 1897
Safety Bolt-fastener.
I, MAXIMILIAN ROHLEDER Merchant of Witkowitz in Moravia, Empire of
Austria 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:-
The slide-bolts used up to the present for folding doors, gates and windows
for fastening the one wing only afford an insufficient security against the
unwarranted opening of the door etc. fastened by means of a lock; for after the
bolts have been pushed back, the lock bolt on pressure being applied to the door,
comes out of the other half of the door, thus making it possible to open the door
without a key.
In the case also of slide-bolts which are sunk into slots it only needs a push in
order to open such a bolt, so that this kind of fastening is not sufficiently secure,
and besides is too dear with regard to its manufacture and fitting up.
The object of the present invention, the safety-bolt-fastener is to do away with
this draw back by a simple bolt-fastener, which makes it impossible to open the
door or the gate or the window, as long as the wing which has no bolt, is locked
by means of a key and lock.
This bolt-fastener, which can be made in a variety of ways is distinguished by
the feature that every bolt can turu and slide and is provided with a bent part
which either catches in between both leaves or projects from the door-leaves,
so that only after the other leaf has been opened by means of a key it is
possible to turn the bolt-hackle out of its slots and thereby to slide the bolt so as
to undo the fastening.
In the annexed drawing several forms of this bolt-fastener are shown as
patterns.
Figs. 1 and 2 show a view and horizontal section and Figs. 3 and 4 view and
vertical section of two bolt-fasteners attached to the outside of the door-leaf.
Figs. 5 and 6 and Figs. 7-9 show two kinds of bolt-fastenings which are sunk
laterally into the door-leaf.
Figs. 10 and 11 are a view and a horizontal section of a modification and Fig. 12
is a view of a further modification of a simplified bolt-fastener.
As may be seen from the Figs. 1-4 the bolt B which is moveably secured to
the outside of the door-leaf A, has a bow-shaped part b which is bent at right-
angles towards the door; the legs of this bow, lie, as shown in Fig. 1, close
to each other, or as shown in Fig. 3 at a certain distance from each other.
This bow can, when the door-leaf A' is open be moved into a correspondingly
shaped aperture a₁ of the door-leaf A, and after the leaf A, has been closed, it is
held fast by the latter.
It is however only possible to put the bow b into the aperture a, after the leaf A
has been bolted i.e. after the bolt B has been pushed forward, so that therefore the
bolt can only be drawn back, if the door-leaf A, is opened after the lock has
been opened and the bow b of the bolt has been moved out.
The bolt 6 can also, as is shown by dotted lines in Figs. 1, 2 & 3 be lenghtened
in such a manner that it catches into the other leaf A' by which means a forcible
pulling out of the bolt is made impossible.

page_text: The slide-bolt B may be sunk into a slot a, cut laterally into the door-leaf A as
shown in Figs. 5-9 instead of on the outside.
In this case the bow b of the bolt after the latter has been pushed by a turn
with its bent-legs, is laid in a correspondingly formed aperture a₁ of the leaf A
when the bar of the bow that connects the legs, on the door being shut,
projects between the two door-leaves A and A' and leans against one of the two
wings.
In this case the bow can form a closed or open eye, as in Figs. 5 and 7, which
leans on the leaf A which is provided with a bolt, or the end of the bow may
only have the form of a pin, projecting from the slit of the door or of a simple
kind; the latter case being marked by dotted lines in Figs. 5, 7 & 8.
The bolt-fastener may be also further secured in the form as shown in Figs. 7
to 9 by a padlock C making fast at the same time the second door-leaf A' for
which purpose the eye c is provided in the door-leaf A in the slit-hinge-bow c' in
the other door-leaf A¹.
The bow may also, the other arrangements being the same lie on on the door-
leaf A instead of on the leaf A' being bent in the opposite direction as is shown in
the Figs. 10-12.
By this means the fastener (Figs. 7-9) provided with a padlock becomes
simpler, the how c¹ being unnecessary or being supplied by the bow b of the
bolt.
This form as is shown in Figs. 10 & 11, or 12, has besides the advantage that
even when very large gaps occur in the door or in the gate, which is especially the
case after long use a forcible sliding of the bolt is not possible, as the bow is
completely prevented from turning by the closed leaf A.
The bolt-fasteners which we have described may be applied in different forms,
as well for doors, gates, windows & the like, which are made of wood as for those
made of metal.
They are made of rolled or round iron, or of metal bars and can be manufactured
at a cheap rate as they need no kind of smith's work; in the same manner the
expensive cutting in of deep slots is not necessary for these bolts.
Having now particularly described and ascertained the nature of my said inveu-
tion and in what manner the same is to be performed, I declare, that what I
claim is :
A safety-bolt-fastener for folding doors, gates or windows, distinguished by a
bolt B, sliding and turning on or in the leaf A, having a bow-shaped part b, which,
when the bolt is pushed forward & the door locked, lays itself between the
leaves A A or the same or projects from the door-leaves, so that only after opening
of the leaf A' the bow b can be turned out of the aperture a¹ and the bolt be drawn
back.
Dated this 14th day of December 1896.
For MAXIMILIAN ROHLEDER,
Bernhard Brockhues.