Improvements in or relating to Door and similar Fastenings.
Year: 1898

page_text: Date of Application, 16th May, 1898- Accepted, 16th July, 1898
COMPLETE SPECIFICATION.
Improvements in or relating to Door and similar Fastenings.
I, OTTO WILK, Manufacturer, of Rennbahn 18, Eisenbach, Thuringia, in the
Empire of Germany, 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 door and similar fastenings.
The accompanying drawing shows by way of example a door fastening accord-
ing to this invention in elevation in Fig. 1 with the covering plate removed and
in Fig. 2 in horizontal cross section.
Fig. 3 is a detail view of the rod and Fig. 4 is a detail view of the locking
device with which said fastening is provided.
In the door or like fastening according to the present invention an inter-
mediate link 3 is used being hinged or pivoted to an adjustable and spring con-
trolled spindle 1 and engaging with the latch 2.
The latch 2 is constantly held in its closing position by means of a spring 4.
The position of the intermediate link 3 shows in full lines in Figs. 1 and 2
the closed position and the position in dotted lines Fig. 2 shows the open position
of the latch.
The fastenings constructed according to this invention have the following
advantages.
The difficult work of fitting the rod or spindle (1) operating the latch is
avoided as well as the necessity of making right and left hand inwards and out-
ward locks and further the drawback of said rods and knobs becoming loose is
obviated.
Of course the construction described can be applied to locks with rising
latches in which case the intermediate link 3 is arranged so as to pivot vertically
about the rod 1 instead of horizontally whereby it acts on the latch 2 so as to
raise it.
In order to prevent in a simple manner the latch from being operated by un-
authorized persons (as at night) the guide sockets 5 of the operating rod 1 and
the latter are provided with holes 6 through which can be passed locking pins 9
which may be attached to the knobs or other suitable places by chains 8 or the
like. In this way the rod 1 is secured against movement and unauthorized open-
ing of the door becomes impossible.
Having now particularly described and ascertained the nature of this
invention and in what manner the same is to be performed I declare that what
I claim is:-
1. A door or similar fastening comprising an intermediate link (3) hinged to
an adjustable and spring controlled operating rod and engaging with the latch
which is constantly maintained in closed position by a spring 4 substantially as
.described.
2. A door or similar fastening of the character described comprising an inter-

page_text: mediate link (3) pivoted to the operating rod (1) in a vertical plane instead of in
a horizontal plane whereby the latch (2) can be raised substantially as described.
3. In a door or similar fastening of the character described the arrangement
of a locking device characterised by the operating rod and its guide sockets (5)
being provided with coinciding holes (6) adapted to receive a locking pin sub-
stantially as described.
4. The combination and arrangement of parts constituting the complete door
or similar fastening substantially as described and illustrated in the accompany-
ing drawings.