Permutation lock

In a permutation lock adapted to secure a hasp, said lock comprising a main housing having a front plate with a plurality of windows, a permutation setting mechanism including manually actuable setting elements protruding through the windows, a plurality of rotary members operably connected to said setting elements, said rotary members each including an interruption on its outer periphery, a movable spring-biased locking element engageable with said rotary members in such manner that said locking element is situated in a locking position if any of said setting elements is off-combination and in an unlocking position if all of said setting elements are on-combination, a movable spring-biased locking bolt arranged for rotation between a locking position for securing the hasp and an unlocking position for releasing the hasp, said locking element when in its locking position preventing said bolt from moving from its locking position to its unlocking position, an ancillary housing connected to said main housing at a rear end thereof opposite said front plate, said bolt and its biasing spring being mounted in said ancillary housing, one of said main and ancillary housings including a wall between said locking bolt and said locking element, said locking element including a lock portion arranged to project through an opening defined by a region not covered by said wall, when said locking element is in its locking position, in order to prevent rotation of said bolt from its locking position to its unlocking position.