Closure fasteners – Bolts – Sliding
Patent
1989-05-12
1990-08-07
Moore, Richard E.
Closure fasteners
Bolts
Sliding
70283, 292144, 292153, 292359, E05C 116
Patent
active
049462075
DESCRIPTION:
BRIEF SUMMARY
DESCRIPTION OF INVENTION
This invention relates to electrically controlled locks of the type in which a deadlocking element which forms part of the locking mechanism is movable by means of an electrically operated control device between an operative position in which the lock mechanism is deadlocked and an inoperative position in which the lock mechanism is freed to enable a latch or bolt element to be withdrawn. Such locks are hereinafter referred to as electrically controlled locks of the kind specified.
Conventionally, electrically controlled locks of the kind specified incorporate a solenoid within the lock housing which is mounted on or in a door, so that it is necessary to provide electric wiring on or in the door and a flexible conductor or conducting hinge connected to the external wiring. This is undesirable for a number of reasons, including difficulty of installation, reliability and safety.
One way of avoiding this requirement is by providing the electrically operated control device on the door frame in assocation with a keep in which the latch or bolt element is received instead of on the door in association with the locking mechanism which controls the bolt or latch element.
However, this has the disadvantage that the door frame and keep have to be constructed in such a way as to allow the door to be opened whilst the latch or bolt element remains in its projected position, thus introducing an inherent weakness into the system, which is then not suitable for high security applications.
In accordance with the present invention, in an electrically controlled lock of the kind specified the deadlocking element is coupled to the electrically operated control device magnetically so that said control device can be installed in the door frame, thereby obviating the need for electrical wiring in or on the door itself.
In a preferred arrangement the dead-locking element is connected to a linkage system which includes a permanent magnet disposed at an edge of the lock housing which, in use, will register with an edge of the associated door frame, and the electrically operated control device includes a solenoid for mounting within the door frame in register with said permanent magnet.
The invention will now be described by way of example with reference to one embodiment thereof as schematically illustrated in the accompanying drawings wherein:
FIGS. 1 and 2 respectively illustrate a lock and keep combination in its locked condition and in its unlocked condition.
In the illustrated embodiment a lock assembly 10 is adapted in conventional manner to be mounted within the thickness of a door (not shown) and an associated keep assembly 20 is likewise adapted to be mounted in a door frame (not shown).
The lock assembly 10 comprises a generally conventional housing 11 with a face plate 11a which is adapted to be mounted at the outer edge of a hinged door. The housing 11 contains a latch 12 which is biased outwardly by means of an associated spring 13, and the latch 12 can be withdrawn manually by means of a lever handle 14 mounted on a square section spindle 15 which carries a collar 16 having an arm 17 arranged to engage an abutment 18 provided on the latch 12 whereby operation of the lever handle 14 withdraws the latch 12 against the force of spring 13 in conventional manner.
The keep assembly 20 includes a mounting plate 21 and a recess 22 for the reception of the protruding end portion 12a of the latch 12, the mounting plate 21 being adpated for mounting on an edge face of a door frame in register with the face plate 11a of the lock assembly 10.
Thus far, the lock and keep assembly are entirely conventional, and it will be understood that the lock assembly 10 may also include any conventional key-operated locking mechanism for dead-locking the bolt 12 or a separate dead-bolt if required.
The lock assembly 10 in accordance with the invention also incorporates an electrically controlled dead-lock mechamism 30 which comprises a pivotally mounted dead-locking element 31 which is movable into a position (as sho
REFERENCES:
patent: 2466481 (1949-04-01), Royal
patent: 3361462 (1968-01-01), Foster
patent: 3586361 (1971-06-01), Ohno
patent: 4529234 (1985-07-01), Senften
patent: 4596411 (1986-06-01), Geringer et al.
patent: 4623178 (1986-11-01), Geringer et al.
Moore Richard E.
Newman Tonks Security Limited
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