A door latch system comprises an interchangeable latch assembly for securing a door to a door frame. The interchangeable latch assembly comprises a head and a latch mounted to the head. The latch is moveable between latched and unlatched positions. A driven member is operatively connected to the latch, the driven member moveable to latch or unlatch the latch. The door latch system further comprises a universal actuating assembly removably couple-able to the interchangeable latch assembly. The universal actuating assembly comprises a mounting bracket and a driving member releasably coupled to the driven member. Actuation of the universal actuating assembly translates the driving member and the driven member, moving the latch to the unlatched position. A first interchangeable latch assembly may be swapped with a second interchangeable latch assembly without requiring modification of the universal actuating assembly.

An indicator assembly according to certain embodiments generally includes a mounting bracket, a follower, a transmission ring, and an indicator plate. The follower is rotatably mounted to the mounting bracket, and is configured to receive a tailpiece of an input device. The transmission ring is rotatably mounted to the mounting bracket, and is engaged with the follower. The indicator plate is slidably mounted to the mounting bracket for movement between a first indicator plate position and a second indicator plate position to selectively place a first indicium of the indicator plate within a reference area. The transmission ring is operably connected with the indicator plate such that movement of the transmission ring between a first transmission ring position and a second transmission ring position drives the indicator plate between the first indicator plate position and the second indicator plate position.

A center slide assembly for a multi-point exit device. Upper and lower spool assemblies may be displaced from first positions to second positions along an inner region of a center slide. The displacement of the spool assemblies may displace upper and lower pull cables so as to retract latch mechanisms from extended positions to retracted positions. A first latching pin may be displaced, along with the displacement of the upper spool assembly, along an abutment surface of a tilting link so as to pivotally displace the tilting link from an unlocked position to a locked position. Displacement of the lower spool assembly may displace a second latching pin to a position wherein the second latching pin may be received and retained within a jog of the tilting link when the tilting link is in the locked position, which may thereby retain the associated latch mechanism in the retracted position.

An exit device assembly for use in association with a door having a top, a bottom and a generally vertical surface. The exit door assembly includes an exit device configured to be mounted on the surface of the door, the exit device including a manually movable member, a latch mechanism configured to be mounted adjacent one of the top and the bottom of the door, the latch mechanism including a latch movable between a locking position and a non-locking position, and a non-rigid device for causing movement of the latch in response to movement of the manually movable member.

An improved roller latch bolt that asymmetrically locates the roller within a roller support is presented. The improved design allows for a roller to make contact with a ramp surface of a corresponding strike plate on a sweep side of the plate and allows for the roller support to make contact with the strike plate on a latch side of the plate. The improved roller latch bolt maintains the smooth operation of roller latch bolts while also providing the increased door security and other benefits of non-roller latch bolts.

An exemplary noise-reducing mechanism for door hardware includes a housing, a damper, and a stop. The door hardware includes a first component and a second component, and an operational movement of the door hardware causes relative movement of the first and second components. The housing is mounted to the first component, and the damper is mounted to the housing. The stop is mounted to the second component such that the stop engages the damper during the operational movement. The damper is configured to slow the operational movement, thereby reducing noise generated by operation of the door hardware.

A universal door lock-driving assembly is installed in an exterior space of a door panel. The door panel is furnished with at least one of an embedded lock cartridge, an embedded vertical-extending lock bar assembly and an exposed vertical-extending lock bar assembly. The universal door lock-driving assembly includes a base set, an action unit, a driving member and a slidable unit. The slidable unit can assemble a first assembling member and a second assembling member. The first assembling member can apply a penetration slot on the base set to generate interaction with the embedded lock cartridge or the embedded vertical-extending lock bar assembly. The second assembling member can interact with an exposed lock bar. Thus, the universal door lock-driving assembly can be used to unlock at least the lock cartridge and the lock bar assembly.

A door latch assembly includes two receptacles and latchbolts mounted to a door panel, two actuating levers connected to the latchbolts, a base support attached the door panel, a sliding member slidably attached to the base support, two cranks attached to the base support and engaged with the sliding member, two couplers attached to the base support and coupled to the cranks, two seats attached to the couplers, and two adjusting devices each include one end threaded with the seat and another end threaded with the actuating lever and for allowing the actuating levers to be moved and adjusted relative to the seats with the adjusting device.

An exit device comprises an inner door handle adapted to be mounted to a door for movement relative to the door from a first position to a second position. A pair of brackets are adapted to be operatively connected between the respective ends of a horizontal portion and a vertical portion of the door handle. Each bracket comprises a first bracket member secured to the door handle, a second bracket member adapted to be secured to the door, and a pin for joining the first bracket member and the second bracket member for rotation about an axis through the pin. The first bracket member and the second bracket member pivot relative to one another when the door handle moves between the first position and the second position.

An emergency entry control system which is particularly adaptable for use with double panic doors typically found in schools, movie theaters, and other public facilities. The system includes a base, connecting bracket, and engagement means designed to be removably secured to the top latching mechanism and/or bottom latching mechanism of a conventional double panic door configuration to prevent double panic doors without a center bar from being opened from the outside. The system is rotated manually to permit the panic doors to operate normally. The system can also be modified with wireless and audio technology to effectuate audible and visual notification and facilitate location and communication during emergency situations like an unauthorized attempt at entry or removal of the system.