Improvements in Locks for Doors.
Year: 1892

page_text: Date of Application, 19th Nov., 1892
Complete Specification Left, 5th May, 1893-Accepted, 10th June, 1893
PROVISIONAL SPECIFICATION.
Improvements in Locks for Doors.
I, JOSEF CATHREIN of Innsbruck, in the Empire of Austria, do hereby
declare the nature of this invention to be as follows:
-
This invention relates to locks for doors which can be operated from any part of
a roon, for instance, from the bed, or from the table by means of a weight,
suspended from the end of a cord attached to the said lock.
The said invention comprises a casing having a lever pivotted therein which
lever is connected at one end to the bolt and at the other end to a weight. A
cord is secured to this, weight and passes out of the casing and over suitable
pulleys to any desired part of the room where the end of the said cord is provided
with a suitable weight.
The weight in the casing and that at the end of the cord are so calculated with
reference to the frictional resistances that both remain stationary in any position
but any pull on the weight at the end of the cord causes a corresponding movement
of the weight in the casing.
The said weight in the casing is so arranged with relation to the fulcrum of the
lever that it holds the same in the position in which the bolt is unlocked as long as
the weight at the end of the cord is not pulled, when however the said weight is
drawn down it turns the lever into the position to lock the door.
When the bolt has to be drawn back to allow the door to be opened it is only
necessary to raise the said weight by hand whereupon the weight in the casing
turns the lever in the manner described so as to draw back the bolt and release
the door.
The bolt may be provided with a handle to enable it to be actuated direct and
instead of the weight in the casing a spring may be used if desired.
Dated this 19th day of November 1892.
HASELTINE, LAKE & Co.,
45, Southampton Buildings, London, W.C., Agents for the Applicant.
COMPLETE SPECIFICATION.
Improvements in Locks for Doors.
I, JOSEF CATHREIN, of the Reform Hotel, Innsbruck, Tyrol, in the Empire of
Austria, Hotel Proprietor, 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 :-
My invention relates to door locks or fastenings which can be opened from any
desired part of a room as for instance from the bed or the table by means of a
cord, one end of the cord being directly or indirectly connected with the bolt, and
the other end of the cord having attached to it a weight which is so proportioned
with relation to the frictional and other resistances that when left to itself it permits
the bolt to remain stationary in any position but when moved by hand it causes the
bolt to move so as to lock or unlock the door.
In the accompanying drawing,
Figure 1 shows a folding door with one form or modification of my improved
lock or fastening applied thereto,
Figure 2 is a perspective view of the same drawn to an enlarged scale;

page_text: Figure 3 is a side elevation partly in section of the same,
Figure 4 is a horizontal section of the same on the line xx of Figure 2, and
Figure 5 is a front elevation of another modification of my improved lock, the
cover plate being removed.
According as the door opens inwards or outwards I secure as in Figures 1 to 4
a bolt catch A to the door, or to the door post so that a projection A of the said
catch extends over the edge of the door post or the door and on the door post.
or the door respectively I arrange a bolt C to slide freely in
sleeve B.
a vertical
The bolt is attached to one end of a cord D which passes over guide rollers to
any desired part of the room at the other end of which cord is 'suspended a
weight E. This is so proportioned with relation to the weight of the bolt and the
frictional resistances, that when undisturbed it cannot cause any movement of the
bolt. But when this weight is raised or pulled down by hand the bolt C falls
down by gravity or is raised in front of the projection A' thus locking or unlocking
the door. Stops C' (Figures 3 and 4) on the back of the bolt prevent its being
pulled entirely out of the sleeve B.
In the lock above described it may be found inconvenient to provide the bolt
catch with a projection A¹ projecting beyond the door or the door post. This
inconvenience however is avoided in the modification shown in Figure 5.
In this modification the bolt C is guided horizontally in a casing B secured to
the door post or the door and the bolt catch A secured to the door or door post
respectively is made in the form of an ordinary staple. A pin on the bolt
engages with the siotted end G of a lever I carrying at its other end a weight H
and pivotted at K in the casing B. The cord D is attached to the weight H at L
and passes out of the casing B and over guide rollers to any desired part of the
room where the weight E is attached to it.
As long as the weight E is left to itself the weight H on the lever I and hence
also the bolt remain stationary in any position, the weight E being suitably pro-
. portioned for this purpose the same as in the former modification. But when the
weight E is raised by hand, the weight H urged by gravity assumes the position
shown in Figure 5 in full lines, in which the door is locked. On pulling down the
weight E the weight H is raised into the position shown in dotted lines in Figure 5
whereby the bolt is drawn back into the casing B and the door is unlocked. It
will be seen that in the modification of my improved door lock shown in Figure 5
no part of the lock projects beyond the door or door post and it is of no
consequence for the arrangement of the parts whether the door opens inwards or
outwards.
In folding doors the normally fixed leaf takes the place of the door post for both
modifications of the lock above described.
Having now particularly described and ascertained the nature of my said inven-
tion and in what manner the same is to be performed, I déclare that what
claim is :-
"
1. A door lock to be opened or locked from any given part of a room by
means of a cord D one end of which is directly or indirectly connected with the
bolt C and the other end of which is connected with a weight E so proportioned
that when left to itself it permits the bolt to remain stationary in any position,
but when moved by hand it causes the bolt to move relatively to the bolt catch
and thus to lock or unlock the door, substantially as described and shown in the
drawing.
2. In door locks substantially as hereinbefore described the combination of the
bolt catch A having a projection A¹ with the bolt C directly connected to
the cord D to the other end of which a weight E is attached the said bolt being
guided vertically in a sleeve B substantially as described with reference to
Figures 1 to 4.

page_text: 3. In door locks of the kind above described the combination of the bolt catch A
with the bolt C, the lever 1, the weight H, the cord D, and the weight E sub-
stantially as described with reference to Figure 5, and for the purpose set forth.
Dated this 5th day of May 1893.
HASELTINE, LAKE & Co.,
45, Southampton Buildings, London, W.C., Agents for the Applicant.