Locks – Operating mechanism – Predetermined time interval controlled
Patent
1992-01-13
1994-05-03
Gall, Lloyd A.
Locks
Operating mechanism
Predetermined time interval controlled
70267, E05B 4300
Patent
active
053076559
DESCRIPTION:
BRIEF SUMMARY
The present invention concerns a device for controlling timed triggering of a mechanism, particularly for unlocking a vault lock, consisting of at least one sliding bolt in a disengaging mechanism and at least one movable locking pin designed to unlock the disengaging mechanism and prevent displacement of the bolt, said movable locking pin being coupled with a mechanical activating device associated with a control module, in which the mechanical activating device comprises at least one element for storing potential energy, the control module having means for arming said element.
BACKGROUND OF THE INVENTION
Various devices of this type for equipping safes, vaults, or doors of protected sites are already known.
The timed control device for opening a lock described in international application published as No. W089/03922 comprises a locking mechanism controlled by an electronic device with a triggering module and a blocking module. The locking mechanism is designed to block a bolt in locked position for a predetermined time period defined by the electronic control device.
These known conventional mechanisms generally have a spring barrel and a timing mechanism with an escape device which frees the energy in a previously armed spring barrel at a moment previously defined by the timing mechanism and disengages a peg associated with a locking pin.
These timing mechanisms have the disadvantage of being very costly because the mechanical parts must be extremely precise. Furthermore, the controls which can be exerted on this type of mechanism are limited to those which can be exerted on a mechanical watch movement, in known manner.
SUMMARY OF THE INVENTION
The present invention proposes overcoming the disadvantages described above by achieving a device of conventional appearance using the energy stored by a spring mechanism to unlock a locking pin, while also providing more effective, more precise and more reliable controls than those presently used.
To achieve this, the device according to the invention is characterized in that it has programmable electronic timing means and a device associated with this means to free said potential energy at a predetermined moment defined by this programmable electronic timing means.
According to a preferred embodiment the means for storing said potential energy is a spring mechanism which generates mechanical force.
Said means for freeing the potential energy advantageously consists of a locking cam.
Preferably, said locking cam consists of a pivoting element disposed to engage in at least one peripheral notch in a locking disc, said locking disc being coupled to the axle of the spring generating mechanical force. They are coupled by means of toothed wheels.
According to an advantageous embodiment, the locking cam is attached to an output shaft on an electric motor. The electric motor is preferably an oscillating type motor.
In the preferred embodiment, the device for freeing said potential energy further consists of a wheel with a click, a click mounted on said wheel, a ratchet concentric with said wheel and engaging said click, and a drive wheel connected to said wheels, the wheel with the click, the ratchet and the drive wheel being mounted on the axle of the spring generating mechanical force.
The click wheel advantageously has a catch designed to cooperate with a lever pivoting on an axle which moves a positioning disc into the appropriate locking position in relation to the locking cam.
In this form of embodiment, the means for arming the potential energy storage element consists of a key shaft coupled with a drive pinion supporting an arming click, said click being designed to cooperate with a set peg supported by a set wheel, said wheel being integral with the axle of the spring generating mechanical force.
Preferably, the drive pinion is integral with a pinion engaging a release rake with a triggering peg disposed to act on the movable locking pin of a lock, and said set wheel engages a contact disc, said wheel being associated with a programming disc to provide a
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Boltz Jean-Henri
Monnier Jean-Luc
Sermet Pierre-Andre
Ciposa Microtechniques S.A.
Gall Lloyd A.
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