FR2448609A1 - Detector sensing attempt. to force open locked door - includes microswitch behind spring-biased plate in lock mortise connected to alarm circuit - Google Patents
Detector sensing attempt. to force open locked door - includes microswitch behind spring-biased plate in lock mortise connected to alarm circuitInfo
- Publication number
- FR2448609A1 FR2448609A1 FR7903350A FR7903350A FR2448609A1 FR 2448609 A1 FR2448609 A1 FR 2448609A1 FR 7903350 A FR7903350 A FR 7903350A FR 7903350 A FR7903350 A FR 7903350A FR 2448609 A1 FR2448609 A1 FR 2448609A1
- Authority
- FR
- France
- Prior art keywords
- plate
- box
- alarm circuit
- locked door
- lock
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Classifications
-
- E—FIXED CONSTRUCTIONS
- E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
- E05B—LOCKS; ACCESSORIES THEREFOR; HANDCUFFS
- E05B45/00—Alarm locks
- E05B45/06—Electric alarm locks
- E05B45/08—Electric alarm locks with contact making inside the lock or in the striking plate
- E05B45/083—Electric alarm locks with contact making inside the lock or in the striking plate with contact making either in the striking plate or by movement of the bolt relative to the striking plate
- E05B45/086—Electric alarm locks with contact making inside the lock or in the striking plate with contact making either in the striking plate or by movement of the bolt relative to the striking plate by transverse movement
Landscapes
- Push-Button Switches (AREA)
Abstract
The lock plate includes a box (5) closed by a cover of sheet metal (6). The box is welded to a mounting plate (7) fastened to the door frame by a number of screws. The box has an opening (8) to receive the bolt of the lock. The box also includes a movable element (10) which may slide in a direction perpendicular to the plane of the door. An electrical switch (13) is so positioned behind the plate so that when the plate is moved, the contacts are operated. A pair of strong coil springs (14) lie between the plate and the base of the box, biasing the plate away from the contact. Any attempt to open the door whilst it is locked results in the plate moving to operate the switch, and thus operating the alarm circuit.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR7903350A FR2448609A1 (en) | 1979-02-09 | 1979-02-09 | Detector sensing attempt. to force open locked door - includes microswitch behind spring-biased plate in lock mortise connected to alarm circuit |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR7903350A FR2448609A1 (en) | 1979-02-09 | 1979-02-09 | Detector sensing attempt. to force open locked door - includes microswitch behind spring-biased plate in lock mortise connected to alarm circuit |
Publications (1)
Publication Number | Publication Date |
---|---|
FR2448609A1 true FR2448609A1 (en) | 1980-09-05 |
Family
ID=9221795
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
FR7903350A Pending FR2448609A1 (en) | 1979-02-09 | 1979-02-09 | Detector sensing attempt. to force open locked door - includes microswitch behind spring-biased plate in lock mortise connected to alarm circuit |
Country Status (1)
Country | Link |
---|---|
FR (1) | FR2448609A1 (en) |
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3535301A1 (en) * | 1984-10-04 | 1986-04-17 | Gebr. Grundmann GmbH, Herzogenburg, Niederösterreich | Locking piece or lock case |
US5752728A (en) * | 1994-02-12 | 1998-05-19 | Matouschek; Erich | Alarm-triggering locking device for the catch and/or hinge region of a door or window to be protected |
EP0952299A1 (en) * | 1998-04-21 | 1999-10-27 | GFM S.r.l. | Burglar alarm for roller shutter |
EP3594435A1 (en) * | 2018-07-11 | 2020-01-15 | ABUS August Bremicker Söhne KG | Alarm signaller for a door locking system |
WO2023097346A1 (en) * | 2021-11-24 | 2023-06-01 | De Villiers Marius De Wet | Armed strike plate |
-
1979
- 1979-02-09 FR FR7903350A patent/FR2448609A1/en active Pending
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3535301A1 (en) * | 1984-10-04 | 1986-04-17 | Gebr. Grundmann GmbH, Herzogenburg, Niederösterreich | Locking piece or lock case |
US5752728A (en) * | 1994-02-12 | 1998-05-19 | Matouschek; Erich | Alarm-triggering locking device for the catch and/or hinge region of a door or window to be protected |
EP0952299A1 (en) * | 1998-04-21 | 1999-10-27 | GFM S.r.l. | Burglar alarm for roller shutter |
EP3594435A1 (en) * | 2018-07-11 | 2020-01-15 | ABUS August Bremicker Söhne KG | Alarm signaller for a door locking system |
WO2023097346A1 (en) * | 2021-11-24 | 2023-06-01 | De Villiers Marius De Wet | Armed strike plate |
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