Locks – Operating mechanism – Using a powered device
Patent
1991-02-07
1993-06-01
Gall, Lloyd A.
Locks
Operating mechanism
Using a powered device
70416, 292144, 292153, 292160, 292168, 292DIG65, E05B 4700
Patent
active
052149463
DESCRIPTION:
BRIEF SUMMARY
BACKGROUND OF THE INVENTION
The present invention, relates to a multi-controlled security lock designed in particular for use as a part of a security system installed for the protection of enclosed areas and capable of being operated locally by a key and remotely by electrical control.
DESCRIPTION OF THE PRIOR ART
Prior art multi-controlled locks of this type are generally provided with a latch element that can be moved back and forth by use of either a key or an electric control device typically a power solenoid.
Prior art security locks, however, have several disadvantages, the main disadvantage being the large number of component parts resulting in costly manufacture and poor reliability.
A further disadvantage of prior art security locks is that they are manufactured in different versions each meeting specific application requirements such as, for instance a right-hand version or a lefthand version for installation on right hinged or left hinged doors, respectively, and outside and inside according to whether the security lock is to be installed on the outer or inner face of the door to be protected, and the like.
A still further disadvantage of prior art security locks is that they cannot generally be operated by means of a panic handle from inside the area to be protected in order to permit a fast emergency exit.
SUMMARY OF THE INVENTION
It is an object of the present invention to provide an improved more reliable security lock of low cost design having a lower number of component parts used in the constructions and being easily manufacturable.
It is another object of the present invention to provide a perfectly symmetrical or universal security lock such that one model thereof can be used in every kind of application as both a left-hand and right-hand lock, mounted on either the door wing or the door frame.
It is a further object of the present invention to provide a security lock which can be easily fitted with a panic handle to facilitate exit from the protected area under emergency conditions.
According to the present invention there is provided a multi-controlled security lock including a slide which can be moved back and forth with respect to the frame by at least one of two control devices, such as a key control device or a remote electric control device; a carriage, constrained by lock bolts, being movable back and forth with respect to the frame; and a non-reversible actuating device located between the slide and the carriage, the arrangement being such that the back and forth movement of the slide causes, through the non-reversible device, the back and forth movement of the carriage, however, a force exerted on the carriage, at least in the lock opening direction, causes the carriage to be locked in position.
A panic device driving the slide is also provided.
A security lock constructed according to the present invention will, therefore, feature high security, both active and passive, as well as simplicity and low cost due to the lower number of component parts.
BRIEF DESCRIPTION OF THE DRAWINGS
A preferred embodiment of a multi-controlled security lock constructed according to the present invention will now be described in more detail by way of example, with reference to the accompanying drawings, in which:
FIG. 1 is a side view, partially in section, of a preferred embodiment of the lock when the lock bolt is in a retracted or inoperative position;
FIG. 2 is a side view, partially in section, of the lock of FIG. 1 when the lock bolt is in an extended or operative position;
FIG. 3 is a front view of the lock of FIG. 1; and
FIG. 4 is a top view of the lock of FIG. 1.
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT
Referring to the accompanying drawings and in particular to FIG. 1, the security lock comprises a box frame 10 to which two guides 12, 12' are secured. Sliding along the guides 12, 12' are two lock bolts 16, 16' which engage the door frame, in known manner.
Lock bolts 16, 16' constrain a carriage 14 which can move back and forth from a retracted or inoperative positi
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