FR2651351A1 - Alarm device - Google Patents

Abstract

The alarm device comprises a battery supplying an alarm (3) via a control circuit. This control circuit comprises a switch (2) the control member of which is actuated by a movement of the striker (4) of a lock. It is very simple, reliable, inexpensive and can be mounted on existing doors.

Description

- 1 -

ALARM DEVICE

  Alarm devices intended to activate a buzzer during a break-in are often sensitive to the interruption of a light beam, a motion or vibration detector, etc. All of them, however, have the disadvantage of calling upon a human intervention

  as for their decommissioning or their standby state.

  In addition to nuisance alarms and forgetting to activate

  service, it is not uncommon for attention and handling.

  lations required by this kind of device are neglected

  aged or abandoned. The provision of a lock and a strike provided with a device located inside said strike intended to actuate a bell from excessive pressure due to an attempted break-in aims to

  no doubt to remove these kinds of drawbacks.

  However, the installation of such a device carried out

  most often by professionals incites its owner

  be quiet to relieve it during a move under penalty of

  leave a hole in the door due to removal of the service

  rure. In addition, the obligation to close said lock in order to put the device in standby state hardly resolves

  problems related to forgetting to put into service. The invention

  tion relates to a peripheral alarm device

  pact, simple and sensitive, eliminating any human intervention as to put it out of service or in standby state

  and offers a peripheral alarm device for this purpose.

  risk. -2- This alarm device is distinguished in particular by the fact that it comprises a battery supplying an alarm via a control circuit, this circuit

  control comprising a switch, the control unit of which

  Mande is actuated by a movement of the strike of a lock. The attached drawing illustrates schematically and by way of example different embodiments of the device

alarm according to the invention.

  o10 Figure 1 shows a peripheral alarm device

  risk stripped of its protective cover and installed

  as it should be on the frame of a high door

the original keeper.

  FIG. 2 illustrates a variant of the device shown

felt in figure 1.

  Figure 3 illustrates a detail of the variant illus-

shown in Figure 2.

  Figure 4 illustrates a second embodiment of the

alarm device.

  In the first embodiment illustrated in Figures 1 to 3, the alarm device comprises a housing B intended to be fixed in any known manner on the door jamb. This box B contains a blade

  spring 1, one end of which is integral with the box

  tier B and the other end of which emerges from this box

  tier. This leaf spring acts on a push button 2 connected to a striking device 3. The free end of said blade 1 is supported on the original keeper 4 of the lock and has the function of detecting the position thereof. Therefore, any movement of the keeper due to a -3.

  excessive pressure exerted during an attempted break-in

  tion will instantly actuate the push button by means of said leaf spring 1 actuating

thus the alarm bell.

  The door being opened or closed normally, the pressure of the blade 1 against the strike remains constant and does not undergo any change in its position. However, if the door is closed, any excessive push to push it in will have the effect of moving the strike. The leaf spring 1 then mechanically actuates the push button

  which will in turn activate the alarm bell.

  Being away without having to touch a single button to put the alarm device in standby mode naturally removes oversight from commissioning. In addition, when returning to the house no precaution is to be taken when opening the door. This state

  in fact therefore also suppresses nuisance alarms.

  The device being intended for all households does not require any particular knowledge as to its installation, and remains operational in the event of a power failure. Its standby state consuming no energy source requires very little attention except to change a battery

9 volts once a year.

  The battery, the buzzer, the spring blade and the push button are all housed in box B, the device

  alarm is very compact and can be sold in the ma-

  specialized gasins or supermarkets. Indeed, it does not require any particular installation if it is not the fixing of the box B against the jamb of a door

where you want it.

  -4- The variant of this device illustrated in Figures 2 and 3 comprises a second housing B2 containing a switch whose control member 5 emerging from the housing B2 is intended to be in contact, in the service position, with a hinge of the door P. This normally open switch

  is connected in parallel to the buzzer 3 by a conduc-

  tor 6 connecting boxes B and B2.

  Thus, any attempted break-in by kidnapping or

  forcing the hinge of the door also triggers the

tear.

  In the second embodiment illustrated in FIG. 4, the housing B is also fixed to the door jamb. This box B contains a battery, a buzzer and a push button type switch whose control member 7 emerges from the box B. On the keeper 8 of the lock, it is fixed, using a sticker for example , a plate 9 comprising a stud 10 now in position

  the push button in the tripped position.

  Here also the user can open and close the door normally without any manipulation. As soon as we try to break or break down the door, the striker 8 is moved,

  the stud 10 releases the control member 7 from the push button

  evening thus putting the ringer on.

  In all forms of execution, the a-

  the peripheral tear is sensitive to the pressures exerted on a door fitted with a security lock and a strike in order to push it in. Said keeper is provided with a member intended to activate an alarm bell from a certain pressure, transmitted by means of the bolt

during an attempted break-in.

- 5 -

  This device allows triggering an alarm

  tick, bright or any other kind. It also allows

  to turn on a camera or

a photo or video camera.

-6-

Claims (7)

  1. Alarm device comprising a battery supplying   an alarm (3) via a communication circuit   control, characterized in that said communication circuit   control includes a switch (2) whose control member   control (1) is actuated by movement of the keeper (4) of a lock.   2. Device according to claim 1, characterized in that it is housed in a housing (3) intended to be   fixed on the door frame, by the fact that the or-   control switch (1) of the switch (2) emerges from the box   tier and cooperates directly with the strike plate (4) of the door.   3. Device according to claims 1 or 2, character-   laughed at by the fact that the control member (1) of the inter- breaker (2) is a leaf spring.   4. Device according to claims 1 or 2, character-   laughed at by the fact that the control member (7) is a your pusher.   5. Device according to one of the preceding claims,   characterized by the fact that it still has an interrup-   tor (B2) connected in parallel to the buzzer (3), including   - 7 - mandated by a member in contact (5) with a hinge (P) of the door. 6. Device according to claim 4, characterized in that the push button (7) cooperates with a stud   (10) fixed on the housing (8) of the strike plate of the lock.   7. Device according to claim 6, characterized in that the stud (10) is glued to the housing of the lo waste.