Safety locks

A lock comprising:

• a housing having an indoor side and an outdoor side;
• an axis passing through said housing from said indoor side to said outdoor side;
• a main bolt having a bolt portion and a latch portion, said main bolt being displaceable into and out of said housing;
• a double acting actuating mechanism coupled to said main bolt by said axis, said axis having a first pin to actuate said actuating mechanism and a second pin to actuate said actuating mechanism, said first pin and said second pin displacing said main bolt into and out of said housing;
• locking means for preventing displacement of said main bolt;
• a combination hub being disposed in said housing, said combination hub releasing said locking means when a combination key is introduced into said combination hub;
• means for limiting the displacement of said main bolt upon movement out of said housing such that only said latch portion is exposed out of said housing, said double acting actuating mechanism comprises a control plate fixed to said main bolt, said control plate is slidably mounted, to attain an alternating movement in correspondence with said main bolt, by means of an elastic means that is fixed on the one end to said housing and on the other end to said control plate, means for limiting displacement of said control plate, means for elastically biasing said control plate and cam means fixedly mounted on said axis, said cam means cooperates with said limiting means to release said limiting means and simultaneously cooperates with said control plate to displace said control plate in a direction opposite to said elastically biasing means.

A lock comprising:

• a housing having an indoor side and an outdoor side;
• an axis passing through said housing from said indoor side to said outdoor side;
• a main bolt having a bolt portion and a latch portion, said main bolt being displaceable into and out of said housing;
• a double acting actuating mechanism coupled to said main bolt by said axis, said axis having a first pin to actuate said actuating mechanism and a second pin to actuate said actuating mechanism, said first pin and said second pin displacing said main bolt into and out of said housing;
• locking means for preventing displacement of said main bolt:
• a combination hub being disposed in said housing, said combination hub releasing said locking means when a combination key is introduced into said combination hub;
• means for limiting the displacement of said main bolt upon movement out of said housing such that only said latch portion is exposed out of said housing, wherein said means for limiting displacement of said main bolt comprises a second latch means that is normally biased to a position exposed outside of said housing, said second latch means controls displacement of said main bolt when both pass from their retracted position inside said housing to their external position, in such a way to allow only said latch portion of said main bolt to be exposed out of said housing, said means for limiting displacement of said main bolt comprises a plate which is mounted in a perpendicularly displaceable manner with respect to the direction of displacement of said main bolt, and is elastically forced into contact with said main bolt, said plate having a displacement adjusting stop that is controlled by a cam surface of said second latch means to enable displacement of said plate against said main bolt and a coupling means provided on the edge of said plate contacting said main bolt and which cooperates with a notch in said main bolt to permit the partial displacement of said main bolt such that only the latch portion is exposed out of the housing.