An Improved Lock or Fastening.
Year: 1890

page_text: Date of Application, 6th Sept., 1890
Complete Specification Left, 27th Apr., 1891-Accepted, 30th May., 1891
PROVISIONAL SPECIFICATION.
An Improved Lock or Fastening.
I, CARL POPPER of Miskabez, in the Empire of Austria-Hungary, Bank
Manager, do hereby declare the nature of this invention to be as follows:-
The object of this invention is an improved electric bolt lock, by means of which
a door closed thereby can be opened without being approached.
The improved lock essentially consists of a bolt, a lever device serving to lock
and unlock this bolt and an electromagnet.
By shifting out the said bolt, which is guided at a bar, by means of a knob, the
door is closed; it can be opened when a suitably placed spiral spring draws back
the bolt, which is normally prevented by a projection of a two-armed lever engaging
in a corresponding recess of the bolt. On withdrawing the said projection from its
keeper or recess by inciting an electromagnet whose armature is forined by the one
arm of the said lever, the bolt is allowed to yield to the action of the spring. The
electromagnet is adjustable by screws or otherwise in order to allow a corresponding
distance to be maintained between the armature and electromagnet. The latter is held
up by the action of a suitably placed spring which however must be comparatively
weak with regard to the limited power of an electromagnet practically applicable
for this purpose. To ensure the entrance of the projection into the bolt at the
opportune inoment, another two-armed lever pivoted jointly with that mentioned
above is provided parallel to the latter, one arm of which is provided at the end
with a wedge; the bolt so carries a corresponding wedge as to press up the wedge
of the lever when the bolt is being pushed out. Thereby the second arm of the
last mentioned lever produces a pressure on the corresponding longer arm of the
main lever i.e. on the armature and the opposite arm of the main lever is caused to
rise. The levers are adapted to be regulated by means of a set screw provided
near the bolt and an elastic pressing knob or pin projecting outside the lock and
being with the other end near the armature. By depressing the said knob, the lock
can also be opened, as is easily understood from the foregoing description.
Dated this 6th day of September 1890.
HUELSER & Co.,
Agents for Applicant.
COMPLETE SPECIFICATION.
An Improved Lock or Fastening.
I, CARL POPPER of Miskabez in the Empire of Austria-Hungary, Bank
Manager, 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 object of this invention is an improved electric bolt lock, by means of which
a door closed thereby can be opened, without being approached. By means of this
device, for instance, a person lying in bed can admit anyone to the room by simply
pressing a button which can be placed near the bed in the same manner as the
button of an electric bell. The annexed drawing represents such a lock,
Figure 1 being a plan view with the cover removed,
Figure 2 a side view, showing the mode of construction of the case, a part being
cut away at a b.
As shown in the drawing, the improved lock consists essentially of a bolt, a lever
device serving to lock and unlock this bolt and an electro-magnet. By shifting out.

page_text: the said bolt a by means of a knob, the door is closed; it can be opened when a
suitably placed spiral spring draws back the bolt a which is normally prevented
by the end of a two-armed lever do e engaging in a corresponding recess of the
bolt. If now it be desired to open the bolt, the end of the lever do e must be
withdrawn from the recess of the bolt a, which is effected by magnetising the soft
iron burs by means of an electric current which surrounds it. The electro-
magnet, formed in this manner, draws the arm oe of the lever do e towards the ends
of the bars, whereby the end of the second arm comes out of the recess and the
bolt springs back. The electro-magnet is adjustable by screws g or otherwise, in
order to allow a corresponding distance to be always maintained between the
armature or lever arm o and the electro magnet. The wedge i is held up by the
action of a suitably placed spring which, however, must be comparatively weak
in view of the limited power of the electro magnet practically applicable for this
purpose.
To ensure, with certainty, the entrance of the projection into the slot of the
bolt at the proper moment there is also another arrangement; this consists of a
two-armed lever mon pivoted in conjunction with the one do e mentioned above
and parallel to the latter, one arm of which, mo is provided at the end with a
wedge the bolt carries a corresponding wedge in such a way as to press upon
the welge m of the lever when the bolt is being shot out. Thereby the second
arm om of the Inst mentioned lever produces a pressure on the corresponding
arm oe of the main lever (that is on the armature) and the arm do of the main
lover is caused to rise. The levers are adapted to be regulated by means of a set
screw and a pressing knob or pin r provided with a spring (projecting outside the
lock and having its other end near the armature). By depressing the said knob,
the lock can also be opened, as thereby the lever armo e is pressed upwards, and
the lever arm do, and therewith the small wedge i, is pressed down.
Having now particularly described and ascertained the nature of the said inven-
tion and in wliat manner the same is to be performed, I declare that what I
claim is
1. The improved construction of lock or fastening, consisting of a bolt a with
knob and wedged lover idoe for advancing and holding the bolt respectively
and the means for withdrawing the bolt, consisting of a spring e, which can only
act when electro-magnets (capable of adjustment by two screws) or a spring pin r
is operated, all arranged substantially as hereinbefore described and shown.
2. In combination with a lock or fastening such as described in Claim 1, the
means for securing a safer action of the wedged lever i do e, consisting of a wedged
lever km on in connection with a wedge on the bolt, these two latter parts being
so arranged in relation to one another that the wedge can be drawn up by the
wedge, substantially as and for the purposes herein before described and shown.
3. The general construction and arrangement, taken as a whole, of the improved
lock or fastening substantially as hereinbefore described and shown.
Dated Bio 02nd 1001
WM. P. THOMPSON & Co.,
Of 6, Lord Street, Liverpool, Agents for the Applicant.