Mortise lock

In a mortise lock having a case including a front and inner and outer side walls, a spring projected latch bolt movable through the front between projected and retracted positions, and a latch bolt retractor mechanism including inner and outer hubs journalled for independent coaxial rotation between the side walls and a retractor supported in the case for reciprocal rectilinear movement relative to said case between first and second positions respectively corresponding to projected and retracted positions of said latch bolt in response to rotation of either of the hubs, the improvement wherein said retractor comprises a generally L-shaped metallic member positioned adjacent one of said side walls and having one leg disposed generally rearward of said hubs and another leg extending forwardly from said one leg beyond said hubs and toward said front, and a non-metallic low friction retractor shoe attached to said L-shaped member adjacent said one leg and projecting from said one leg in the direction of the other of said side walls, said retractor shoe being disposed rearward of said hubs for engagement with said hubs, said mortise lock further including a first guide pin mounted in fixed cantilever position on said case rearwardly of said hubs and extending toward said hubs and in the direction of retractor movement, said first guide pin having a free end portion slidably received within a bore in said retractor shoe, and a second guide pin supported in fixed position on said case forward of said hubs and extending in a transverse direction relative to the direction of retractor movement, sad second guide pin slidably received within a slot formed in the forward end portion of said other leg.

In a mortise lock having a case including a front and inner and outer side walls, a spring projected latch bolt movable through the front between projected and retracted positions, a latch bolt retractor mechanism including inner and outer hubs journalled for independent rotation within the housing and having a latch bolt retractor supported in the case and operably connected to said latch bolt for retracting the latch bolt in response to rotation of either of the hubs, and a deadlocking mechanism including a deadlocking lever having a blocking surface and supported in the case to pivot between a deadlocking position wherein the blocking surface is disposed in blocking relation to the latch bolt in its projected position and an inactive position wherein the blocking surface is out of the path of movement of the latch bolt and including an auxiliary bolt for controlling movement of the deadlocking lever, the improvement comprising said deadlocking lever having a ramp portion intermediate its pivot and said blocking surface, and means for preventing transmission of force in a latch bolt retraction direction from said latch bolt to said ramp portion, said means including a slot in said case defining a forwardly facing abutment surface and a projection on said deadlocking lever received in said slot and defining a rearwardly facing abutment surface disposed in opposing relation to said forwardly facing abutment surface.