Year: 1896

page_text: proveme
I, PHILIPP HEINZ of 5 Mittlerer Hasenpfad, Frankfort-on-the-Main in the
Empire of Germany, Gentleman do hereby declare the nature of this invention to
be as follows:
It frequently occurs with locks as ordinarily constructed that in locking the
doors of apartments or of wardrobes or drawers or the like the key is removed
before the lock has properly engaged with the staple, and the door, drawer, or the
like therefore, although supposed to be locked, is left unlocked.
This objection is remedied by the present invention in a simple and effective
manner by providing a lock in which there is in addition to the ordinary bolt
a plate or obstructor the head of which can enter an aperture in the end of the
lock casing or the end plate which serves to secure the lock to the door, drawer,
or the like.
The said obstructor is retained in this position by a spring or weight and
when so situated it covers part of the keyhole so that then the key cannot be
removed.
When the door, drawer, or the like is locked, the locking bolt as it advances,
operates a pusher or lever pivotted, for example, to the staple plate, which
pusher or lever acts on the said obstructor and forces it back, so that a
notch or slot in it comes opposite the key hole and then the key can be removed.
To prevent the removal of the key from the lock when the door, drawer, or the
like, is open, by forcing back the obstructor, a catch is provided which normally
engages with a notch in the said obstructor. As the lock is being unfastened
the key first removes this catch and then the obstructor is at liberty to recede.
With locks for safes, or locks of a similar description, it is desirable to secure
the obstructor in position in a particularly firm and reliable manner whilst the
door of the safe or the like is open. For this purpose steel pins may be arranged
at right angles to the direction of motion of the obstructor after the manner of for
example, the well known Yale lock, and a plate of convenient shape is, by the
pusher or lever for causing the obstructor to recede, caused to advance so as
first to raise what may be regarded as the tumblers and then to drive back
the obstructor.
The mechanism hereinbefore described may readily be fitted to existing locks.
JOHNSONS & WILLCOX,
47 Lincoln's Inn Fields, London, W.C., Agents.

page_text: Improvements in Locks.
1, PHILIPP HEINZ of 5 Mittlerer Hasenpfad, Frankfort-on-the-Main, in the
Empire of Germany, Gentleman, 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 :-
It frequently occurs with locks as ordinarily constructed that in locking the
doors of apartments or of wardrobes or drawers or the like the key is removed
before the lock has properly engaged with the staple, and the door drawer or the
like therefore, although supposed to be locked, is left unlocked.
This objection is remedied by the present invention in a simple and effective
manner, by providing a lock in which there is, in addition to the ordinary
bolt, a plate or obstructor, the head of which can enter an aperture in the
end of the lock casing or the end plate which serves to secure the lock to the
door drawer or the like.
The said obstructor is retained in this position by a spring or weight and,
when so situated, it covers part of the key-hole, so that then the key cannot be
removed.
The accompanying drawings represent a lock constructed in accordance with
my invention,
Figure 1 shewing the parts in the positions they assume when the bolt of the
lock is withdrawn and Figure 2 shewing the parts in the position they assume when
the bolt of the lock is shot.
The aforesaid obstructor is marked a and the opening in the casing or end plate
which its end enters is marked 6 whilst the spring which retains it in this position
is marked d.
When the door, drawer or the like is locked, the pawl or catch is raised by
the key from the notch in the obstructor a and the locking bolt, as it advances,
operates a pusher or lever pivotted to any suitable part for example to the staple
plate e, the nose of which pusher or leverf passes through the opening in the
staple plate and in the casing or end plate e and acts on the obstructor a and
forces it back so that a notch or slot g in it comes opposite the keyhole, as shewn
in Figure 2 and then the key can be removed.
The pawl or catch engaging in the notch prevents the removal of the
key from the lock, by forcing back the obstructor when the door drawer or the
like is open.
With locks for safes or locks of a similar description, it is desirable to secure
the obstructor in position in a particularly firm and reliable manner whilst the door
of the safe or the like is open. For this purpose steel pins may be arranged at
right angles to the direction of motion of the obstructor after the manner of, for
example, the well known Yale lock,-and a plate of convenient shape is, by the
pusher or lever f caused to advance so as first to raise what may be regarded as
the tumblers and then to drive back the obstructor.
The mechanism berein before described may readily be fitted to existing locks.
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
1. A lock with mechanism for preventing the removal of the key until the
bolt has entered the staple-plate, the said mechanism consisting of, or including,
a spring-controlled plate or obstructor such as a, provided within the case of the
lock, in front of the key-hole, and a lever, such as f-which is operated by the

page_text: main bolt of the lock, to move the plate or obstructor a so that a notch or slot g
therein coincides with the key hole, to enable the key to be removed only when
the bolt is properly shot substantially as hereinbefore described.
2. The combination with a lock, according to the first claim, of a pawl or catch
such as for securing the plate or obstructor a and adapted to be raised by the
key, for the purpose hereinbefore set forth.
Dated this 14th day of April 1897.
JOHNSONS & WILLCOX,
47 Lincoln's Inn Fields, London, W.C., Agents.