Abstract: A lock which includes a bolt, a catch, a handle for manually moving the catch from an operative position to an inoperative position, first link means, and electrically actuable means for causing movement of the first link means between first and second positions, the first link means, at the said first position, translating movement of the handle in a first direction into movement of the bolt from a locked position to an unlocked position and, at the said second position, allowing handle movement in the said first direction without corresponding movement of the bolt.

Abstract: A lock which includes a bolt which is movable between a locked position and an unlocked position against the action of a biassing element such as a spring, first retaining element which is engaged with the bolt and which retains the bolt in the locked position and which is movable between a first position at which the first retaining element restrains the bolt from being moved from the locked position to the unlocked position and a second position at which the first retaining element restrains the bolt from being moved from the unlocked position to the locked position, remotely actuable release element, which when actuated, causes movement of the first retaining element from the first position to the second position, and handle element for moving the bolt from the locked position to the unlocked position when the first retaining element is disengaged from the bolt.