Abstract: A latch combination includes an automatic latch device having a latch bolt engaged in a housing and having a free end extendible out of a door panel, an actuating member pivotally engaged with the housing and engaged with the latch bolt, a deadbolt engaged in a casing and engaged with the actuating member and having a tongue extendible out of the casing, and a spring biasing member biasing the free end of the latch bolt into the door panel and pivoting the actuating member to move the tongue of the deadbolt out of the housing, a manual latch device includes a spring biasing member biasing the free end of the latch bolt out of the door panel to normally latch the door panel to a door frame.

Abstract: An LED lamp includes a base, a driving circuit board mounted to the base, a lighting module, a light guide member and a reflecting member. The lighting module includes a plurality of light emitting diodes that are disposed on and electrically connected to the driving circuit board. The light guide member has an open end portion that is connected to the base, that corresponds in position to the light emitting diodes, and that is disposed for receiving light emitted from the light emitting diodes, and a close end portion that is opposite to the open end portion. The reflecting member is disposed in and abuts against the light guide member for reflecting the light transmitted from the light guide member.

Abstract: An LED lamp includes a base, a driving circuit board mounted to the base, a lighting module, a light guide member, and a reflecting member for reflecting light transmitted from the light guide member. The lighting module includes LEDs annularly disposed on and connected electrically to the driving circuit board. The light guide member has a light-receiving end corresponding in position to the LEDs. The reflecting member has an annular reflecting portion disposed in the light guide member, and a covering portion extending outwardly from a distal end of the annular reflecting portion and covering a distal end of the light guide member.

Abstract: A method for defining a monitoring area for an image is provided, applicable to an image-based surveillance system, including the steps of: automatically generating a closed polygon on an image; determining whether the closed polygon requiring adjustment, if so, receiving an adjustment command from the user and performing corresponding adjustment . The adjustment commands include at least a move polygon command to move the entire polygon and a move vertex command to move a vertex of the polygon.

Abstract: A door handle assembly includes a lock casing having an inner cam and an outer cam and a latch bolt, an indoor handle device attached to an inner portion of the lock casing with an actuating device and having a handgrip for being depressed to actuate an actuating bolt and the inner cam to operate the latch bolt, and an outdoor handle device attached to an outer portion of the lock casing with another actuating device and having another handgrip for being pulled to actuate another actuating bolt and the outer cam to operate the latch bolt, the outdoor handle device and indoor handle device are replaceable with each other when the actuating devices are disposed up-side-down.

Abstract: An automatic hidden latch structure includes: a base secured in position to a close side of a door, the base having a positioning plate for positioning and a receiving portion and a block portion disposed at one side of the positioning plate; a transmission mechanism including a lock tongue disposed in and protruding from the receiving portion, a transmission member abutting against the lock tongue, a rotating member driven by the transmission member, and an engaging member engaging with the rotating member and protruding from the receiving portion, a first elastic element insertably engaing the engaging member, and a second elastic element mounted on a joining member of the engaging member and insertably engaging the joining member. Given actuation of the mechanism, a latch post of the automatic hidden latch structure protrudes from the door whenever the lock tongue is pressed upon, thereby locking the door.

Abstract: A lock device includes a casing formed in a housing for rotatably receiving a rotary member which has an actuating finger and which is coupled to a handle with a driving shank, and a spring biasing device attached to the housing and engaged with the actuating finger of the rotary member for biasing the handle back to an original position and for biasing the actuating finger of the rotary member back to an original position when the handle is released, the spring biasing device is locked to the housing with a fastener to disengage the follower from the actuating finger of the rotary member when a spring biasing member is engaged between the handle and the housing to bias the handle back to an original position.

Abstract: A door handle assembly includes a lock casing having an inner cam and an outer cam and a latch bolt, an indoor handle device attached to an inner portion of the lock casing with an actuating device and having a handgrip for being depressed to actuate an actuating bolt and the inner cam to operate the latch bolt, and an outdoor handle device attached to an outer portion of the lock casing with another actuating device and having another handgrip for being pulled to actuate another actuating bolt and the outer cam to operate the latch bolt, the outdoor handle device and indoor handle device are replaceable with each other when the actuating devices are disposed up-side-down.

Abstract: A frame includes a seat attached to a lower beam, and an anchor attached to an upper beam and having a pivotal catch tongue, a tubular member has a lower portion detachably engaged with the seat and having an upper latch shaft for engaging with the catch tongue and for detachably locking the latch shaft and the tubular member to the anchor, a follower is slidably attached to the tubular member for disengaging the catch tongue from the latch shaft, a lock device is secured to the tubular member and includes an actuating shank having a rocker arm for moving the follower to disengage the catch tongue from the latch shaft, and for preventing the tubular member from being disengaged from the anchor by unauthorized persons.

Abstract: A press bar mechanism includes a latch bolt attached to a housing, a pressing bar attached to the housing and coupled to the latch bolt, a rod received in the housing and coupled to the latch bolt, a casing coupled to the housing and having a chamber for receiving a hydraulic fluid, a piston is engaged in the casing and has one or more fluid flowing orifices, and the piston is smaller than the casing for forming a peripheral passage between the casing and the piston, a piston rod is attached to the piston and coupled to the rod, and a valve member is attached to the piston for blocking the orifices of the piston and for limiting the fluid to flow in one direction relative to the piston, and a spring biases the rod toward the casing for biasing the pressing bar away from the housing.

Abstract: A door lock assembly includes a lock casing device and a door lock device attached to the opposite sides of a door panel, a core device pivotally mounted to the lock casing device and operatable by an actuation device, an adjustable shaft mechanism includes a housing coupled to the core device and having a number of orifices and a channel communicative with a chamber of the housing, a shank slidably engaged in the housing and having a free end for engaging with the door lock device, and a spring-biased detent attached to the shank for engaging with either of the orifices of the housing and for anchoring the shank to the housing at a selected position and for adjustably mounting the shaft to the door panels of different thicknesses.

Abstract: A lock device includes an actuating lever pivotally engaged in a lock housing for actuating a deadbolt of a latch device, two rotary mechanisms pivotally engaged in the housing and each having a rotary member pivotally engaged in a casing for coupling to an outdoor handle and an indoor handle, and the rotary member of one of the rotary mechanisms is secured to the casing for allowing the rotary member and the casing of the rotary mechanism to be rotated relative to the lock housing with the indoor handle only, and for preventing the outdoor handle from being brutally rotated by the unauthorized persons and for preventing the lock device from being destroyed or damaged by the unauthorized persons.

Abstract: A door lock assembly includes a lock casing device and a door lock device attached to the opposite sides of a door panel, a core device pivotally mounted to the lock casing device and operatable by an actuation device, an adjustable shaft mechanism includes a housing coupled to the core device and having a number of orifices and a channel communicative with a chamber of the housing, a shank slidably engaged in the housing and having a free end for engaging with the door lock device, and a spring-biased detent attached to the shank for engaging with either of the orifices of the housing and for anchoring the shank to the housing at a selected position and for adjustably mounting the shaft to the door panels of different thicknesses.

Abstract: A lock device includes an actuating lever pivotally engaged in a lock housing for actuating a deadbolt of a latch device, two rotary mechanisms pivotally engaged in the housing and each having a rotary member pivotally engaged in a casing for coupling to an outdoor handle and an indoor handle, and the rotary member of one of the rotary mechanisms is secured to the casing for allowing the rotary member and the casing of the rotary mechanism to be rotated relative to the lock housing with the indoor handle only, and for preventing the outdoor handle from being brutally rotated by the unauthorized persons and for preventing the lock device from being destroyed or damaged by the unauthorized persons.

Abstract: An unlock transmission mechanism for escape doors is disclosed, including a base, a transmission member, a first drive unit and a second drive unit, wherein the transmission member, the first drive unit and second drive unit are all disposed on the base, and the transmission member is actuated to move relative to the first drive unit and the second drive unit, respectively. In the case that the unlock transmission mechanism is to be installed in an escape door that has a different installation orientation, the transmission member and the first drive unit provided therein have the characteristics of multi-directional changeability, thereby enabling flexible installation of the escape door lock and eliminating the necessity to replace an existing door handle mechanism as encountered in the prior art.

Abstract: A frame includes a seat attached to a lower beam, and an anchor attached to an upper beam and having a pivotal catch tongue, a tubular member has a lower portion detachably engaged with the seat and having an upper latch shaft for engaging with the catch tongue and for detachably locking the latch shaft and the tubular member to the anchor, a follower is slidably attached to the tubular member for disengaging the catch tongue from the latch shaft, a lock device is secured to the tubular member and includes an actuating shank having a rocker arm for moving the follower to disengage the catch tongue from the latch shaft, and for preventing the tubular member from being disengaged from the anchor by unauthorized persons.

Abstract: A lock device includes a casing formed in a housing for rotatably receiving a rotary member which has an actuating finger and which is coupled to a handle with a driving shank, and a spring biasing device attached to the housing and engaged with the actuating finger of the rotary member for biasing the handle back to an original position and for biasing the actuating finger of the rotary member back to an original position when the handle is released, the spring biasing device is locked to the housing with a fastener to disengage the follower from the actuating finger of the rotary member when a spring biasing member is engaged between the handle and the housing to bias the handle back to an original position.

Abstract: An automatic hidden latch structure includes: a base secured in position to a close side of a door, the base having a positioning plate for positioning and a receiving portion and a block portion disposed at one side of the positioning plate; a transmission mechanism including a lock tongue disposed in and protruding from the receiving portion, a transmission member abutting against the lock tongue, a rotating member driven by the transmission member, and an engaging member engaging with the rotating member and protruding from the receiving portion, a first elastic element insertably engaing the engaging member, and a second elastic element mounted on a joining member of the engaging member and insertably engaging the joining member. Given actuation of the mechanism, a latch post of the automatic hidden latch structure protrudes from the door whenever the lock tongue is pressed upon, thereby locking the door.

Abstract: A door lock includes an actuating lever attached to a housing and engaged with a handle shaft, a rotary member rotatably mounted to the housing and connected to the actuating lever with a slide plate and a rocker arm, a spindle rotatably engaged with the rotary member, a latch member slidably attached to the rotary member and engageable with the spindle, and a follower having an actuating finger for selectively disengaging the latch member from the spindle and for preventing the spindle from being rotated by the rotary member and the actuating lever when the door is locked, and for preventing the connecting mechanism between the dead bolt and the actuating lever from being damaged by the actuating lever brutally or forcedly.