mprovements in Alarms and Fastenings for Doors and the like.
Year: 1885

page_text: mprovements in Alarms and Fastenings for Doors and the like.
I, WILLIAM LLOYD WISE, of No 46 Lincoln's Inn Fields, in the County of
Middlesex, Consulting Engineer and Patent Agent, do hereby declare the nature
of said invention for "IMPROVEMENTS IN ALARMS AND FASTENINGS FOR DOORS
AND THE LIKE" (a communication to me from abroad by J. L. Petit, Manufacturer
of Antwerp, in the Kingdom of Belgium) to be as follows:-
If an attempt be made to open the door from the outside an alarm is sounded
in the following manner.
Upon a key, or picklock or other object being introduced into the lock from the
outside it comes in contact with a pivotted lever, and pushes it forward. The
other end of this lever forms a detent, and normally engages with a portion of an
alarm mechanism.
The motion of the lever frees the mechanism and immediately an alarm is
sounded by means of a bell or gong or other suitable appliance, thus giving notice
that an attempt is being made to unlock the door. The sound may be produced
at the door itself, or at a distance or at both places, according to circumstances.
In one form of apparatus according to this invention there is affixed to the door
to be guarded a box containing a spring which can be wound up, and gear, such
as an escapement wheel and pellets, together with other suitable appliances for
striking or ringing a bell or gong. From the box there projects a lever, which
may conveniently lie in a groove cut in the door. One end of this lever acts as a
detent and normally locks the alarm mechanism. The other extremity is provided
with a sliding piece which can be drawn out until it stands in such a position that
if a key or other object be inserted in the lock, from without, it will come in
contact with the sliding piece, pushing the lever inwards and freeing the detent
from the alarm mechanism.
The sound will at once commence. The alarm mechanism may be connected to
a bell or bells in another part of the house by a wire, if desired.
According to this invention additional security may be given to doors and the
like by means of a movable pin or stop piece which is introduced into the path of
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page_text: the bolt after it is shot, and entirely prevents the return motion of the bolt until
the said pin or stop is so far withdrawn that the bolt may pass it. A person even
provided with a key cannot gain admittance through a door so protected without
the aid of another person on the inner side of the door to remove the pin or stop,
and moreover any attempt at entering is signalled by reason of the working of the
alarm apparatus.
Improvements in Alarms and Fastenings for Doors and the like.
I, WILLIAM LLOYD WISE, of N° 46 Lincolns Inn Fields in the county of
Middlesex, Consulting Engineer and Patent Agent, do hereby declare the nature
of this invention (a communication to me from abroad by J. L. Petit, of Antwerp
in the kingdom of Belgium) and in what manner the same is to be performed, to
be particularly described and ascertained in and by the following statement :-
If an attempt be made. to open the door from the outside an alarm is sounded
in the following manner :-
Upon a key or picklock or other object being introduced into the lock from the
outside it comes in contact with a pivotted lever, and pushes it forward. The
other end of this lever forms a detent, and normally engages with a portion of an
alarin mechanism.
The motion of the lever frees the mechanism and immediately an alarm is
sounded by means of a bell or gong or other suitable appliance, thus giving notice
that an attempt is being made to unlock the door. The sound may be produced
at the door itself, or at a distance, or at both places, according to circumstances.
According to this invention additional security may be given to doors and the
like by means of a movable pin or stop piece which is introduced into the path of
the bolt after it is shot, and entirely prevents the return motion of the bolt until
the said pin or stop is so far withdrawn that the bolt may pass it. A person even
provided with a key cannot gain admittance through a door. so protected without
the aid of another person on the inner side of the door to remove the pin or stop,
and moreover any attempt at entering is signalled by reason of the working of the
alarm apparatus.
Referring to the accompanying sheet of drawings Fig. 1. is a front view of the
apparatus, the bell and the lid of the box containing the clock work being supposed
to be removed.
'
Fig. 2. is a plan of the apparatus; balf of the circular wall of the box is removed
to show the inside. In these various figures, the same letters indicate corresponding
parts

page_text: A. B. is a box of suitable dimensions and form containing clock work consisting
principally of a spring box containing a spiral spring which can be wound up by a
handle or key, a gear wheel D, an anchor escapement E, and auxiliary wheels,
ratchets and the like.
F. G. is a lever capable of oscillating upon a pivot O. O. One extremity F. of
this lever enters the box containing the clock work and engages when the lever is.
in its normal position with two of the teeth of the gear wheel D, the clock work
being thus stopped. In this position the part O. G. which is flat, and which lies
in a groove formed in the thickness of the door, occupies the bottom of the said
groove; but whenever this flat part is forced out of the groove, the lever moves,
the part F. drops and releases the gear wheel D, and the spring causes the bell
to ring.
The flat part O. G. of the lever is cut out as shown in the drawing so as to
allow a passage to the knob of a sliding piece H. I. When this knob is pushed.
toward the key hole of the lock, the extremity I of the sliding piece closes the
Baid hole partially; in such a manner that if the key be pushed into the lock
above the sliding piece it produces no further effect that to press the sliding piece
and the flat lever arm against the bottom of the groove in which they lie; but if
the key, or a hook or any other object is introduced in the key hole from the
outside to pick the lock or unlock it, this object meets the sliding piece I and
pushes it, owing to a certain amount of play which it is allowed, the sliding piece
raises with it the flat arm of the lever which is thereby caused to partially rotate
upon its axis O. O. and the clockwork being set free the alarm simultaneously
rings; a spring M brings the lever F. G. back to its place.
The only operation therefore required to put the apparatus ready for action
when the occupier is-within his house and the door has been closed, is to pull the
knob H¹ towards the keyhole, to the right hand side in the drawing, so as to
partially close the said hole. Any attempt to introduce an instrument into the
lock will cause the signal to act. If it is desired that the alarm should be heard
at some other part of the building, as for example, on the first floor, it will be
only necessary to fix at that place a bell upon which there may strike a hammer
actuated by a wire attached to one extremity J. of a supplementary lever J X K.
oscillating upon a pivot X, the other extremity K of the lever engaging with the
teeth of the wheel D. As soon as the lever F. G. releases the wheel D, the
lever J XK will be subjected to a series of vibrations caused by the teeth of the
wheel striking in succession upon the tail K of this lever. These vibrations will
be communicated through the wire to the second bell. A spring N brings the
lever back to its normal position after each blow. To increase the security which
results from the employment of this apparatus a stop pin L may be inserted into a
perforation formed in the inside of the door immediately behind the bolt of the
lock when the latter is shot as shewn in the drawing. It is obvious that every
backward motion of the bolt is prevented by the said stop pin and that in order
to open the door, this pin must be previously withdrawn which can only be
effected from the inside of the house. The groove formed in the thickness of the
door is closed by a plate, which may be ornamented if required, concealing all the
above described pieces. This plate is supposed to be removed in the drawings for
the sake of clearness.
Perfect security is obtained by means of this apparatus. If the knob H¹ is
pushed to its right hand position and the pin L is likewise put in its place; it is
not only impossible to cause the bolt to move but any attempt at introducing an
instrument from the outside if only a piece of wood, will set the alarm going.
Moreover it has this advantage that it will not come into operation when not
required, since it is sufficient to withdraw the stop pin from the perforation in
which it was placed to a distance equal to the thickness of the bolt for the latter
to be able to move backwards and forwards freely and for the knob H¹ to be
moved to the left so that the key will not meet with any obstacle.

page_text: Having thus particularly described and ascertained the nature of this invention
and in what manner the same is to be performed, I declare that what I claim in
alarms and fastenings for doors, is ;-
1. A lever which at one end controls the clockwork of the alarm and at the
other lies in a groove formed in the thickness of the door, substantially as
described.
2. A plate or piece which can be placed at will over or across the keyhole in
such a position that it will be moved and will actuate the alarm mechanism if a
key or other object be inserted in the keyhole, substantially as described.
3. A stop pin constructed substantially as described with reference to and
shewn on the drawings and which when pushed to its furthest position secures. the
bolt in the bolt case or catch, and when withdrawn a distance equal to the
thickness of the said bolt, allows the latter to move freely substantially as
described.
T
4. The means substantially as described for operating an alarm at a distance
from the door, and consisting of a supplementary lever connected to a bell or sets
of bells by a wire, cord, chain or other connexion.
5. The improved alarm, with or without the bolt fastening, substantially as
described with reference to the drawings.