Improvements in Locks for Doors and the like.
Year: 1899

page_text: Date of Application, 18th Mar., 1899-Accepted, 10th June, 1898
Improvements in Locks for Doors and the like.
FRANZ RAWIE, of 4, Süster Strasse, in the City of Osnabrück, in the Province of
Hanover, in the German Empire, Manufacturer, 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 present invention relates to locks having a bolt operated by a pin, and the
essential feature is the improved manner of applying the bent lever used in such
mechanism.
Figs. 1, 2 and 3 show, in three views, the improved device for carrying the bent
lever, with the lever pivoted to it. This device (A), is let into the door-lock at the
part where the door-handle is, and is rigidly secured there. It has a lug (c), on
which the bent lever (B) is pivotally mounted. That arm of the lever which
engages the bolt has a curved end (d), and on the other arm is a depression (e),
formed to receive the pin which operates the lever.
Fig. 4 shows a duplex screw, an inner screw of small diameter taking into an
external one of larger diameter (h). For a door with two pins, two brackets (A) and
two duplex screws are necessary.
Figs. 5, 6 and 7 show a lock when put together and fixed, (f) is the handle rigidly
secured to the door, (g) the knob of the pin operating the lever (B). Of the two
brackets (A), one is inserted into the lock above the bolt, and the other on the
opposite side of the door below the said bolt. In this position, the depression (6) of
the bent lever (0) comes exactly in a line with the said knob (9). The door knob (f)
is secured to the door by the duplex screw (h), the two members of which pass
through the plate (f) and bracket (A). In this manner the correct position of the
door-knob () and bent lever (B) relatively to one another is ensured. The larger
screw is first sorewed into the cylindrical part of the bracket (A), whereby the latter
is firmly pushed into the look, and the plate (f) secured to the door. The smaller
screw is then introduced from the other side of the door and the opposite plate thus
secured.
Fig. 6 shows a double arrangement of the device illustrated by Fig. 5.
Fig. 8 shows the manner in which the bent lever engages with the bolt.
Fig. 9 and 10 show in elevation and section respectively a part of a door
with lock fixed, exhibiting portions removed to introduce the bracket for the bent
lever.
Hitherto for doors of rooms and the like with pin device, the pin has been so
arranged as to operate directly upon the bolt, or its motion has been transmitted to
the latter by means of a straight or bent lever. These levers are as a rule mounted
in the bolt operating device, so that for different thicknesses of doors the engagement
with the look varies or is not precise. By means of the bracket (A) for the bent
lever, the latter can be formed separately from the pin and knob.
After the lock has been secured in the door, one of these brackets (A) is inserted
into the lock from each side of the door, through an opening, and the door knob
then screwed on: The holding screws engage in the conical part of the bracket (A),
FD71

page_text: drawing it firmly into the lock, and ensure of the door knob taking a correct position
both vertically and laterally.
The purpose of the bracket is:
1) To separate the lever from the door knob, so that the bracket, inserted correctly
into the lock, gives the right position to the bent lever relatively to the bolt,
independently of the thickness of the door.
2) To screw on the plate of the door knob, so that it may be properly connected to
the lock by means of screws and bracket instead of to the door.
In this manner a correct engagement of the different parts of the lock, the pin
knob, bent lever and bolt is ensured, which is not the case with the forms of locks
operated by pin as now in use.
The adaptation to various thickness of doors is effected by filing down the pin
to size.
Having now particularly described and ascertained the nature of my said inven-
tion, and in what manner the same is to be performed, I declare that what I
claim is :-
A door look with bolt operated by one or more bent levers and pins, said bent
levers being pivotally mounted in brackets (A) secured in the lock by screws, whereby
they are held in a definite position relatively to the bolt, and independently of the
operating device, said screws also serving the purpose of fastening the door knob
plates, all substantially as herein before set forth.
Dated this 13th day of March 1899.