Closure fasteners – Bolts – Sliding
Patent
1998-05-20
2000-03-14
Boucher, Darnell M.
Closure fasteners
Bolts
Sliding
29234717, 292145, 292304, 292171, E05C 106
Patent
active
060362391
DESCRIPTION:
BRIEF SUMMARY
The present invention concerns security arrangements and is particularly concerned with security arrangements for doors hingedly mounted in frames but is equally applicable to similar arrangements, for example, windows. In this specification the term door is intended to embrace windows and other similar structures.
There presently exist many means for securing a door in its closed position including mortise locks, bolts and security chains. Whereas each of these arrangements is in itself efficient, it often does not provide the user with sufficient confidence as, for example, a door secured by a mortise lock is vulnerable to attack at those areas of the door remote from the lock's bolt. For example, a door secured by a mortise lock can be jemmied at its top and or bottom. To counteract this difficulty it is normal practice either to include a plurality of mortise locks or to augment a single centrally mounted mortise lock with sliding blots or other security arrangements. This solution not only is relatively costly but involves the user in a number of operations, for example, turning the key in a mortise lock and sliding over one or more bolts. This is inconvenient and often leads to the user failing to utilise all the arrangements. It is also inconvenient in a situation where a secure door has to be opened quickly, for example, in a fire.
Certain more expensive securing arrangements utilise a single operation to move a number of bolts simultaneously. These arrangements are relatively complicated in their construction and mode of operation, consequently they are relatively expensive and are relatively unreliable.
All of the arrangements described above suffer from a further disadvantage in that the bolts, locks etc. are effective only at separate located points, that is where a sliding bolt penetrates a recess.
U.S. Pat. No. 4,844,521 discloses a security lock including an elongate member mounted on or adjacent a door jamb.
According to the present invention there is provided a door security arrangement comprising a frame member adapted for mounting alongside the edge of a door which, in use, is not hinged, an elongate member slideably mounted in the frame member and having a length which is substantially equal to the length of the edge of the door against which it is mounted, the elongate member being moveable from a retracted position in which it lies substantially within the frame member and permits the door to swing past it and an extended position in which it lies alongside and substantially against the inner face of the door, releasable means being provided within the frame member to hold elongate member in its retracted and extended positions.
Preferably said releasable means are mechanically operated. Alternatively, said releasable means are electromagnetically, pneumatically or hydraulically operated.
Preferably control means for controlling the movement of the elongate member are provided within the frame member, said control means comprising a rod pivotally mounted in the frame member with its axis substantially parallel to the longitudinal axis of the frame member and having a plurality of bars projecting therefrom, the free ends of each bar engaging within a corresponding aperture in the elongate member whereby on movement of the elongate member between its retracted and extended positions, the rod and bar assembly pivots about its axis of rotation.
Preferably a release assembly of said releasable means restricts pivotal movement of said rod and bar assembly and comprises a latch slideably mounted relative to the frame member and moveable from a holding position in which it prevents pivotal movement of the rod and bar assembly and consequently movement of the elongate member from the retracted to the extended position, and a release position in which it is moved out of the path of travel of said rod to allow pivotal movement of the rod and bar assembly and consequently extension of the elongate member.
Preferably said latch is spring-biased towards its extended position. Preferably a latch act
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Boucher Darnell M.
Vaterlaus Clifford B
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