Lock mechanism

A lock mechanism having a forward end and a reverse end, said mechanism including a lock cylinder at the forward end thereof, a manually engageable knob on the reverse end of the lock mechanism for positioning on the opposite side of a door from said cylinder, said knob being connected to said cylinder by a locking bar means, and a bolt operated by said locking bar means by rotation of said cylinder , wherein the improvement comprises:

• coupling means located between said locking bar means and said manually engageable knob for normally engaging said locking bar means and said knob in mating relationship in a first axial position of said coupling means so that said bolt is also operable by said knob,
• and meshing means for holding said coupling means in a second axial position out of said mating relationship upon axial depression and rotation of said cylinder to place said meshing means in non-meshing relationship so that said bolt is operable only by said cylinder.

A lock mechanism having a forward end and a reverse end, said mechanism including a lock cylinder at the forward end thereof, a manually engageable knob on the reverse end of the lock mechanism connected to said cylinder by a locking bar means and a bolt operated by said locking bar means by rotation of said cylinder, wherein the improvement comprises:

• coupling means rotatable with said locking bar means and located between said locking bar means and said manually engageable knob for normally matingly engaging said manually engageable knob in a first axial position of said locking bar means so that the bolt is also operable by said knob, wherein depressed axial movement of said locking bar means releases the mating relationship between said coupling means and said manually engageable knob so that said bolt is operable only by said cylinder,
• meshing means for also normally matingly engaging said coupling means in interleaved relationship in the first axial position of said locking bar means, wherein depression of said locking bar means to a second axial position and rotation thereof disengages said meshing means to establish a non-meshing relationship for holding said coupling means in a second axial position,
• and means for normally urging said coupling means toward said first axial position.

A lock mechanism having a forward end and a reverse end, said mechanism including a lock cylinder at the forward end thereof, a manually engageable knob on the reverse end of the lock mechanism connected to said cylinder by a locking bar shaft and a bolt normally operated via said locking bar shaft by rotation of said cylinder or said knob, wherein the improvement comprises:

• a hub rotatable with and movable axially with movement of said locking bar shaft, said hub normally having a matingly engageable relationship with said knob in a normal axial position of said locking bar shaft,
• and a rotatable sleeve coaxial with said locking bar shaft, said hub normally being urged into mating relationship therewith,
• said hub being movable axially in response to axial movement of said locking bar shaft and rotatable out of mating relationship with said sleeve to a second non-mating position in which said hub is held out of mating relationship with said knob by said sleeve.