Patent attributes
A padlock can be unlocked by an owner dialing an unlocking number or security personnel using a general key. The padlock includes a lock body, a block, a shackle, a general locking device and a private locking device. The lock body includes a first channel and a second channel therein. The block is inserted in the second channel. The block includes a receptacle therein. The shackle includes a long arm movably disposed in the first channel and a short arm for engagement with the receptacle of the block. The general locking device is disposed in the lock body for locking and unlocking the long arm of the shackle. The private locking device is disposed in the lock body for controlling the block so that the block can be engaged with and disengaged from the short arm of the shackle.
