Closure fasteners – Bolts – Sliding
Patent
1996-03-08
1998-11-17
Lindsey, Rodney M.
Closure fasteners
Bolts
Sliding
292150, E05C 104
Patent
active
058366253
DESCRIPTION:
BRIEF SUMMARY
FIELD OF THE INVENTION
This invention relates to a bolt housing, and in particular to a housing for a sliding bolt; to a pair of bolt housings, to an assembly thereof for the securement of a first housing relative to a second housing, and to a panel fitted with one of the said housings.
In this description, directional terms such as "upper", "lower" etc. refer to the embodiments as drawn i.e. "upwards" means "towards the top of the paper as drawn", and other directional terms should be similarly understood. The embodiments are drawn as they would generally (though not exclusively) be oriented in use.
BACKGROUND TO THE INVENTION
It is often necessary to secure a movable panel to a fixed panel, to prevent unauthorised opening movement of the movable panel and so prevent access through the aperture intended to be closed by the movable panel.
Often the movable panel, such as a door, will be mounted in a fixed frame, so that a part of the frame defines the said fixed panel. However, it is also known, as in "double doors", for both panels to be independently movable, and it is therefore often necessary to secure two movable panels together.
The movable panel may be pivotable upon vertical hinges, such as is known for conventional house doors and many windows; it may be a slidable panel such as a patio door slidable in horizontal runners, fixed one above and one below the door; or it may be one of the plurality of sliding laths comprising a vertically-acting roller shutter door such as may be used as a security fitting for a shop-front or vehicle cargo door.
DESCRIPTION OF THE PRIOR ART
Many devices are known for securing the different types of movable panel described. Amongst the most common are those known as "pivotting hook" lock assemblies, and those known as "mortice" lock assemblies.
A pivotting hook lock assembly is usually used with a slidable panel. The assembly comprises a first housing with a bolt in the form of a hook mounted upon a pivot, and engageable behind a keeper e.g. a cross pin mounted in the second housing. The first housing is mounted to or within the movable panel, adjacent one of the panel edges. The path of the hook is part-circular, defined by the pivot and with the axis of the pivot being perpendicular to the direction of movement of the panel; the cross pin is a bar mounted in the second housing parallel to the axis of the hook pivot.
A mortice lock assembly comprises a first housing carrying a bolt, and in use being (usually) fixed to or into the movable panel adjacent one panel edge, and a second housing providing a keeper mounted to a part of the fixed frame surrounding the panel, the keeper having an aperture of a size closely to receive the bolt. The bolt (which may be of round or rectangular section) is substantially rigid and is slidable between a retracted condition and an extended condition (projecting from the first housing), the bolt in its extended condition being inserted within the bolt aperture of the second housing, and being retained in its inserted condition as by locking means located in the first housing, whereby to secure the first housing assembly relative to the (fixed) second housing, thus securing the movable panel.
A known mortice lock assembly has first and second housings which are substantially rectangular in side elevation, and having in the closed and locked condition respective side walls adjacent the facing edges of the panel and frame respectively, so that these housing side walls are substantially parallel. The facing wall of the first housing has a surface through which the bolt tip may project. The path of a mortice bolt between its retracted and inserted conditions is linear, and perpendicular to the facing side walls and to the surface of the first housing. This mortice type of lock is typically used on hinged (pivotable) panels, the said facing edge of the panel being the edge opposed to the hinged edge of the panel.
Hook securement devices are often expensive to manufacture and difficult to fit, and even then may not be as secure as a mo
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Hultquist Steven J.
Lindsey Rodney M.
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