Control device with redundancy for fitting to a lock
The present invention relates to the field of locks and more particularly to a control device with redundancy for fitting to a lock of an access door to a protected place, the device being adapted to manage a change of state of the lock and to maintain this state current. The present invention relat...
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| Main Authors | , |
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| Format | Patent |
| Language | English |
| Published |
19.08.2003
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| Online Access | Get full text |
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| Summary: | The present invention relates to the field of locks and more particularly to a control device with redundancy for fitting to a lock of an access door to a protected place, the device being adapted to manage a change of state of the lock and to maintain this state current.
The present invention relates to a control device () with redundancy for fitting to a lock having a mechanism () for locking an unlocking an access door, the device () being adapted to manage a change of state of this lock under predetermined conditions and to ensure that this state current is kept current up until the next change of state. This device () comprises means () for controlling the mechanism () and two units () for providing like instructions to the control means. This device () is characterized in that the first unit () has a structure different from that of the second unit (), while effecting common functions, and in that the control means behave functionally as an AND gate to the inputs of which are applied the instructions from the units respectively, when the device is functioning in a normal situation. |
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