Abstract: A locker unit comprises a plurality of lockers provided with doors equipped with a locking device. The locking device consists of a mechanical lock and an auxiliary lock having an electric drive for said device. The locking device comprises a rest position which blocks the access to the mechanical lock and/or its movement, and an opening position which frees said access and/or said movement.

Abstract: A locking arrangement for securing doors (2) or the like with two bolts (5, ) displaceable relative to the door (2) to be closed and two locking devices (7, 8) associated therewith are described. One of the two locking devices (7, 8) has a locking mechanism (9) lockable with a key (10) and the other one is associated with a remote-controllable unlocking drive (14). A positioning device (16) is furthermore associated with lock bolt (5) lockable by the locking mechanism (9), which is actuated when lock bolt (5) is open. The actuation of the remote-controllable unlocking drive (14) is released when lock bolt (5) is open. Safety bolt (6) is associated with the unlocking drive (14). A drive device (17) is associated with the safety bolt (6) and is effective in the opening direction. It cooperates with the lock bolt (5) and is movable with the same in a starting position provided for the displacement of the safety bolt (6 ).

Abstract: An apparatus for determining the size of elongated objects, specifically logs. The logs (4) are floated in a water filled canal (5) and advanced past a measuring device 13 by cranes 8 or water jets. The size of the logs is determined by radiation sensitive devices (21) actuated by light sources 22 or mechanical transducers (54, 55, 56, 57). In another embodiment the log is held stationary while the measuring device is moved longitudinally past the log.