Improvements relating to Locks and Keys.
Year: 1889

page_text: Date of Application, 8th July, 1889
Complete Specification Left, 8th Apr., 1890-Accepted 24th May. 1890
PROVISIONAL SPECIFICATION.
Improvements relating to Locks and Keys.
I, RUDOLF TÄNCzos, of 1, Brandstätte, Vienna, in the Empire of Austria, Manu-
facturer of fireproof safes, do hereby declare the nature of this invention to be as
follows:
This invention relates to locks, and keys therefor and comprises a lock and key
constructed in such a manner, that it may be ascertained by a glance at the key,
whether the lock has been properly actuated, or not.
The ordinary locking mechanism may be of any suitable construction without
departing from the nature of this invention.
The key is provided with a sliding piece. On turning the said key in the lock in
one direction as for instance, for locking the same this sliding piece is pressed against
a cam on the back plate and is thereby forced into its innermost position. On turning
the said key in the opposite direction as for instance for unlocking the sliding piece is
pressed against a cam on the front plate and thereby forced into the opposite or outer-
most position.
After removing the key from the lock it will, according to the position of the
sliding piece show whether the lock has been properly actuated or not.
In order to prevent the accidental displacement of the sliding piece a friction spring
may be attached to the sliding piece.
Dated this 8th day of July 1889
HASELTINE, LAKE & Co.,
45, Southampton Buildings, London, W.C., Agents for the Applicant.
COMPLETE SPECIFICATION.
Improvements relating to Locks and Keys.
I, RUDOLF TÁNCZOS of 1, Brandstätte Vienna, in the Empire of Austria Manu-
facturer of fireproof safes do hereby declare the nature of my said invention and
in what manner the same is to be performed to be particularly described and ascer-
tained in and by the following statement :-
This invention relates to locks, and keys therefor, and comprises a lock and key
constructed in such a manner that it may be ascertained by a glance at the key
whether the lock has been properly actuated or not.
Referring to the accompanying drawings,
Fig. 1 shows the lock and key in section.
Figs. 2 and 3 show inside views of the front and back lock plates.
Figs. 4 and 5 show the key separate and
Fig. 6 shows a modified form of the key partly in section.
The ordinary locking mechanism is not shown in the drawing as it may be of any
suitable construction without departing from the nature of this invention.
The key a is provided with a sliding piece b. On turning the said key a in the lock
in one direction as for instance for focking the same this sliding piece is pressed
against a cam d on the back plate D and is thereby forced into its innermost position,
shown in Fig. 5. On turning the said key a in the opposite direction as for instance
for unlocking, the sliding piece b is pressed against a cam e on the front plate E and
thereby forced into the opposite or outermost position shown in Fig. 4.
After removing the key from the lock it will according to the position of the
sliding piece Figs. 4 5 and 6 show whether the lock has been properly actuated
or not.

page_text: In order to prevent the accidental displacement of the sliding piece ba friction
spring may be attached to the sliding piece as shown in Fig. 6.
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
First. A key provided with a sliding piece so arranged as to be displaced by suitable
cams in the lock for the purpose of showing after removal of the key from the lock
whether the same has been properly actuated or not substantially as described and
shown in the drawings.
Second. A lock provided with cams so arranged as to displace a sliding piece fitted
in the key for the purpose of showing, after removal of the key from the lock,
whether the same is locked or not, substantially as described and shown in the
drawings.
Third. The arrangement of a friction spring f on the sliding piece b substantially
as described and shown in Fig. 6 of the drawings.
Dated this 8th day of April 1890.
HASELTINE, LAKE & Co.,
45, Southampton Buildings, London, W.C., Agents for the Applicant.