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(11) | EP 0 309 192 A3 |
| (12) | EUROPEAN PATENT APPLICATION |
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| (54) | Control for electronic lock |
| (57) A battery powered (40) electronic locking apparatus comprises a locking member (2)
movable between a locking position and an unlocking position, a first electromechanical
means (110) coupled to the locking member to drive the locking member from one of
the positions to the other position upon activation of the first electromechanical
means and a second electromechanical means (111) coupled to the locking member to
drive the locking member from the one position to the other position upon activation
of the second electromechanical means. A control means (3) activates the first electromechanical
means (110) without the second electromechanical means (111) to attempt to drive the
locking member from the one position to the other position to conserve power, and
subsequently activates the first (110) and second (111) electromechanical means together
to attempt to drive the locking mechanism (2) to the other position. This provides
movement of the locking member (2) when the battery voltage is low or the locking
member is bound. In addition, if one attempt by one (110) or both (110, 111) electromechanical
means is unsuccessful, the control means (3) automatically activates (254, 256, 258)
one or both of the electromechanical means a second time. This is effective in the
event that the failure was due to torque applied by a user to a door handle which
bound the locking member. |