Abstract: A keyed cylinder assembly (10) includes a keyed cylinder (3) mounted in a door lock (1) and including a hollow body (31) and a cylinder plug (32) rotatably received in the hollow body (31). The cylinder plug (32) includes an annular groove (327) formed in an outer periphery (320) thereof. The keyed cylinder (3) further includes an arresting member (37) received in the hollow body (31) and having an inner end (371) received in the annular groove (327). The keyed cylinder assembly further includes a first key (4) insertable into a keyway (323) of the cylinder plug (32) to operate both a latch bolt (12) and a deadbolt (13) of the door lock (1). The keyed cylinder assembly (10) further includes a second key (5) insertable into the keyway (323) of the cylinder plug (32) to operate the latch bolt (12) only.

Abstract: An outer operational device includes a cover mounted to a side of a door. An actuating member is mounted in the cover and includes an end engaged with a handle to rotate therewith. A driving member is pivotably received in the cover and includes a wing. A link includes an upper end pivotably coupled with the wing and a lower end pivotably coupled with an end of the actuating member. A driving rod is coupled with the driving member and operably connected to a latch of a lock mounted in the door, so that rotation of the handle causes retraction of the latch.

Abstract: An operating device for a lock includes a mounting plate mounted to an outer side of a door. A frame is fixed in a receiving space of the door. A push member includes a push section operably connected to a latch. The push member further includes a pivotal section having a pivot hole and a sliding groove. A first pivot extends through the pivot hole of the pivotal section and the frame. A second pivot extends through the frame and is slideably received in the sliding groove of the pivotal section. A lever includes a lug received in the receiving space. The lug has a pin hole through which the second pivot extends. When the lever pivots from an upper position to a lower position about a pivot axis defined by the second pivot, the push member pivots about a pivot axis defined by the first pivot for unlocking operation.

Abstract: A lock for a door includes a latch (128) to which an end of a connecting member (46) is operably coupled. A draw rod (48) is securely mounted to the connecting member (46) to move therewith. A base (32) is fixed to the door, and a slide (42) is slideably mounted to the base (32) in the vertical direction. An adjusting block (44) is fixed to the draw rod (48) to move therewith. An adjusting screw (446) is rotatably extended through the slide (42) and threadedly engaged with the adjusting block (44) so that movement of the slide (42) in the vertical direction causes movement of the adjusting block (44) and the connecting member (46) in the vertical direction and of the latch (128) between locking and unlocking positions. Rotation of the adjusting screw (446) causes movement of the adjusting block (44) and the connecting device (40) in the vertical direction to adjust the locking position of the latch (128) relative to the door (10).

Abstract: A door lock includes a bracket fixed to a door. An engaging member is pivotably mounted to the bracket. A draw member includes a first end pivotably connected to the engaging member and a second end operably connected to a retractor. A linking rod is connected between the draw member and an operative member mounted to the door such that operation of the operative member causes movement of the linking rod and pivotal movement of the draw member, which in turn, urges the retractor to move a latch bolt from an extended position to a retracted position. A follower is coupled to the first end of draw member to move therewith. An adjusting member is in threading connection with the follower and rotatable to move the follower relative to the engaging member to adjust a position of the second end of the draw member relative to the retractor.

Abstract: A lock includes a case receiving a driving device having a driving member. A connecting member is connected to the driving member to move therewith. The driving device can be actuated to move the connecting member between upper and lower positions to control alignment of a distal end of a locking member and a passageway of an unlocking member. A first detecting member is mounted in the case and operatively connected to the connecting member. A second detecting member is mounted in the space and connected to a burglar alarm system. When the distal end of the locking member is misaligned with the passageway, the first detecting member is in a conductive state and turns on the burglar alarm system. When the distal end of the locking member is aligned with the passageway, the first detecting member is in a non-conductive state and turns off the burglar alarm system.

Abstract: A fire bolt assembly (10) includes a receiving tube (20) mounted in a door (106). A mounting member (32) is mounted to the receiving tube (20) and includes two coupling faces (56). A positioning bolt (90) is received in the receiving tube (20) and includes a front end (92). A spring (100) is mounted in the receiving tube (20) for biasing the front end (92) of the positioning bolt (90) out of the receiving tube (20). A stop member (58) includes two legs (66) respectively engaged with the coupling faces (56) of the mounting member (32) to hold the positioning bolt (90) in the receiving tube (20). The front end (92) of the positioning bolt (90) is moved out of the receiving tube (20) to engage with a coupling hole (116) in another door (112) or a door frame when the stop member (58) melts due to the heat of the fire, locking the door (106) in place during the fire.

Abstract: A door lock includes an engaging member having a lock core hole. The lock core hole includes a large section and a small section. The large section is formed in an end of the engaging member that is detachably received in a shank of an outer handle. An interchangeable lock core is removably received in the large section. An end of an outer spindle is extended out of a lock body of the door lock and is detachably received in the small section of the lock core hole of the engaging member. The lock core has an outline corresponding to the large section of the engaging member. The lock core can be removed and replaced with a new one. The engaging member can be detached from the outer spindle and the outer handle and replaced with a new engaging member corresponding to the outline of the new lock core.

Abstract: A mullion assembly (10) includes a top mounting block (92) having a positioning rod (102) and attached to a top beam (24) of a door frame (22). A bottom mounting block (112) is mounted on a floor (20) spaced from the top beam (24) in a vertical direction. A post (40) is detachably mounted between top and bottom mounting blocks (92, 112). A brace (50) is mounted to an upper end (42) of the post (40). A mounting bracket (122) is mounted to the brace (50). A pivotal plate (172) is pivotably mounted to the mounting bracket (122) and detachably engaged with the positioning rod (102). A retaining member (138) is mounted to the mounting bracket (122) to lock the post (40) between the top and bottom mounting blocks (92, 112). The mounting bracket (122) moves upwardly and is coupled with the positioning rod (102), allowing further locking of the post (40) when the mullion assembly (10) is exposed to a fire.

Abstract: A mullion assembly (10) includes a top mounting block (92) attached to a top beam (24) of a door frame (22) and having a positioning rod (128) extending in a horizontal direction. A bottom mounting block (132) is mounted on a floor (20) and spaced from the top mounting block (92) in a vertical direction. A post (40) is detachably mounted between top and bottom mounting blocks (92, 132). A brace (50) is mounted to an upper end (42) of the post (40). A mounting bracket (140) is mounted to the brace (50). A pivotal plate (180) is pivotably mounted to the mounting bracket (140) and detachably engaged with the positioning rod (128). A retaining member (198) is mounted to the mounting bracket (140) to lock the post (40) between the top and bottom mounting blocks (92, 132).

Abstract: A dogging device includes a base mounted in a housing of a latch assembly. The base includes a hole through which a shaft rotatably extends. A limiting keyway extends from the hole and receives and limits rotation of a shaft key on the shaft. A dogging member includes a through-hole receiving the shaft. A keyway extends from the through-hole and receives the shaft key of the shaft, allowing joint rotation of the shaft and the dogging member. By engaging a tool with a driving groove in an end of the shaft or by utilizing a lock core key to turn a lock core that directly pivots the dogging member, the dogging member is pivotable between a first position engaged with a latching/unlatching control rod of the latch assembly to lock a latch bolt in a retracted state and a second position disengaged from the latching/unlatching control rod.

Abstract: A mullion assembly (10) includes a top mounting block (92) attached to a top beam (24) of a door frame (22). A bottom mounting block (108) is mounted on a floor (20) spaced from the top beam (24) in a vertical direction. A post (40) is detachably mounted between top and bottom mounting blocks (92, 108). A brace (50) is mounted to a lower end (44) of the post (40). A positioning rod (172) is mounted to the brace (50) and moveable between a locking position and an unlocking position to lock the post (40) between the top and bottom mounting blocks (92, 108). An anchoring rod (214) is mounted to the brace (50) and moveable between an anchoring position and a non-anchoring position, allowing further locking of the post (40) between the top and bottom mounting blocks (92, 108) when the mullion assembly (10) is exposed to a fire.

Abstract: A mullion assembly (10) includes a top mounting block (92) attached to a top beam (24) of a door frame (22). A bottom mounting block (108) is mounted on a floor (20) spaced from the top beam (24) in a vertical direction. A post (40) is detachably mounted between top and bottom mounting blocks (92, 108). A brace (50) is mounted to a lower end (44) of the post (40). A positioning rod (172) is mounted to the brace (50) and moveable between a locking position and an unlocking position to lock the post (40) between the top and bottom mounting blocks (92, 108). An anchoring rod (214) is mounted to the brace (50) and moveable between an anchoring position and a non-anchoring position, allowing further locking of the post (40) between the top and bottom mounting blocks (92, 108) when the mullion assembly (10) is exposed to a fire.

Abstract: A cylindrical lock includes inner and outer chassis, inner and outer spindles, and first and second actuating members. One of the first and second actuating members is selectively and rotatably received in the outer spindle. Each of the first and second actuating members includes a limiting groove having first and second groove sections with different arcs in a circumferential direction about a longitudinal axis. A driving member is rotatably received in one of the first and second actuating members. The driving member has a leg movable in the outer spindle between first and second positions along the longitudinal axis and received in one of the first and second groove sections. A driving device is received in the inner spindle. The cylindrical lock has two modes corresponding to selective use of the first and second actuating members to provide locking/unlocking states through supply or not supply of electricity to the driving device.

Abstract: A door lock includes a bracket fixed to a door. A linking rod is slideably mounted to the bracket and includes a slot. A draw member includes a first end pivotably connected to the bracket and a second end operably connected to a retractor. The draw member further includes a guide slot. A pin slideably extends through the slot and the guide slot such that the movement of the linking rod causes pivotal movement of the draw member, which in turn, urges the retractor to move a latch bolt from an extended position to a retracted position. A follower is coupled to the pin to move therewith. An adjusting member is in threading connection with the follower and rotatable to move the follower and the pin relative to the linking rod to adjust a position of the second end of the draw member relative to the retractor.

Abstract: A latch device (30) for a door lock includes a latch (38) pivotable between an extended, locking position and a retracted, unlocking position upon operation of a linking rod (37). A liming block (36) is coupled with the linking rod (37) and movable between a locking position not allowing direct pivotal movement of the latch (38) from the extended position to the retracted position and an unlocking position allowing pivotal movement of the latch (38) from the extended position to the retracted position. When the door is closed, the locking member (36) is moved by gravitational force to a locking position. Movement of the linking rod (37) in an unlatching position through an idle travel moves the locking member (36) from the locking position to the unlocking position without moving the latch (38). Further movement of the linking rod (37) in the unlatching position causes pivotal movement of the latch (38) from the extended position to the retracted position.