Abstract: A removable firearm chamber-obstruction mechanism includes a locking mechanism including at portion configured to be inserted in a chamber of a firearm and engage the chamber so as to be locked in place. The locking mechanism includes one or more finger actuators, a thumb bar actuator engaged with the one or more finger actuators, a release key connected to the thumb bar actuator, and a tooth key disposed in abutment against the release key. A handle covers the locking mechanism, and a lid encloses the handle. The locking mechanism locks and unlocks the tooth key upon a successful manual actuation of the one or more finger actuators and the thumb bar actuator, such that the tooth key engages the chamber in a locked position and is unengaged from the chamber in an unlocked position.

Abstract: A key for opening multiple axial pin locks has a base member with an indexing element and a number of lock pins, configured to match the keyways of the locks. The key has a microprocessor with access to information on the pin configuration for each lock to be opened, and the lock pins are selectively positioned along the base member to match the configuration of a key for a particular lock in response to the user entering an identification code for that lock. The lock pins can slidably engage recessed tracks in the base member, which serve to direct the lock pins parallel to an axis of the base member. A pin latching mechanism can be provided to secure the lock pins in the desired position.

Abstract: A thin lock has a housing, a core assembly mounted in the housing, multiple pin assemblies arranged longitudinally in the core assembly, and a latch assembly mounted through the housing and selectively activates the core assembly and the pin assemblies. Thus, when the thin lock is mounted on a door panel, numbers of the pin assemblies does not relate to a thickness of the door panel. Therefore, the numbers of the pin assemblies are able to be added to increase the complexity and enhance the safety of the thin lock according to user's need.

Abstract: A linkage anti-theft lock head comprises a lock tube (16), a lock core (2), a brake bar (19), a front tumbler (6) with its return spring (20), a rear tumbler (9) with its return spring (20) and a key (1). Clearance fits are provided between the front tumbler (6) and the rear tumbler (9) with the holes (26) distributed axially on the lock core (2). The brake bar (19) is mounted axially along the lock core (2). Brake teeth of the brake bar (19) engage with the teeth grooves of the front tumbler (6) and the rear tumbler (9). Said engagement is a linkage engagement. A brake groove (17) is set on the lock tube (16) to match with the brake bar (19). The tumblers, the brake bar (19) and the lock core (2) constitute a cant device, wherein the front tumbler (6) and the rear tumbler (9) act as moving cams set oppositely, the brake bar (19) acts as a driven member and the lock core (2) acts as a rack.

Abstract: A key-operated pin tumbler lock has a shell in which is rotatably disposed a plug that defines a keyway and a plurality of bores. The bores communicate with the keyway through the plug and in a locked position of the lock communicate with corresponding bores formed in the shell. A plurality of spring-loaded pin stacks are located within the bores and are moveable within the bores against the spring-loading by a key inserted in the keyway into a position wherein the plug can be rotated relative to the shell. A stop means is provided in one of the bores and is adapted to engage the pin stack which is located therein such that a key pin of the stack is prevented from penetrating into the plug to a level reached by key pins of the other pin stacks.

Abstract: A lock system includes keys, key blanks, keyways, and lock cylinders, and the keys or key blanks have opposite sides formed with grooves for cooperating with a conforming keyway. More particularly, the sides of the key or key blank have a portion grooved for registration, another portion grooved for top-level hierarchical master keying, and two other portions, one on each side of the blade, for further master key variations and different combinations. One of the two further sections being curvilinear and the other rectangular or angular cuts. The conforming keyway of the lock includes ridges and grooves corresponding to the grooves and ridges, respectively, of the key or key blank. Instruments other than keys or key blanks may be used to enter the grooves and ridges of the keyway to operate the lock without the use of a precisely configured key.

Abstract: A cylinder lock is disclosed. The cylinder lock can be used on a motor vehicle door lock. The disclosed cylinder lock has plate tumblers and also a key for the cylinder lock. The key for the cylinder lock could be a reversible key.

Abstract: A resettable tumbler lock includes: a lock housing; a sleeve mounted rotatably in the lock housing and formed with a plurality of tumbler bores; a cylindrical latch-connecting part mounted rotatably in the lock housing and formed with a plurality of tumbler holes and a plurality of blind holes; and a plurality of spring-biased tumbler units. The sleeve is rotatable relative to the latch-connecting part between first and second angular positions. At least one of the tumbler bores in the sleeve has an axial projection that does not coincide with that of an aligned one of the tumbler holes in the latch-connecting part when the sleeve is disposed at a predetermined position between the first and second angular positions.

Abstract: A lock furnished with a replaceable lock core, in which the inner lock assembly includes a lock core, a sleeve, and a control ring; the inner lock assembly is mounted in a fixed lock casing; the inner lock assembly and the lock casing are assembled together by means of a catch pin; the key normally used for unlocking the lock can only be turned clockwise without hindering the catching function between he inner lock assembly and the lock casing; when an inner lock assembly is replaced, the key should be inserted for unlocking, and then turned counter-clockwise so as to release the catching function between the lock casing and the inner lock assembly; then, pull the key outwards so as to pull out the inner lock assembly simultaneously, and the replacement of a new lock core for the lock casing is done simply.

Abstract: A lock box is provided with a locking cover held locked by a locking element. The lock mechanism is operated by the fingers of a hand actuating individual tumblers, one for each finger, simultaneously. The fingers push against the tumblers and the distance they push them is determined by the length of the fingers which are held by interdigital stops. The tumblers are spring biased against the finger motion. Each tumbler is provided with a stop and pass mechanism that is adjustable along the length of the tumbler to correspond to a particular finger length so that the pass elements of each tumbler will all be aligned to permit passage of the locking element when a particular hand actuates the mechanism, whereas hands of other elements will position at least one of the stop elements so that the locking element cannot pass and the container remains closed.

Abstract: The invention relates to a lock comprising an assembly of identification plates provided with coding notches. A flat key, presenting a coded side, pushes the plates until their notches are brought into alignment, in which a feeler then comes into mesh by a rectilinear edge. The plates, continuing to slide under the thrust of the key, take along, via the feeler, a member for controlling the bolt. An alarm device indicates any introduction of an unsuitable key.

Abstract: A door lock includes a latch bolt assembly, and two rotary knobs connected to the latch bolt assembly. A press key is incorporated in one of the handle members and a key-operated lock is incorporated into the other knob. A clutch member is employed to connect and disconnect the latch bolt assembly to and from an actuating member which can engage with and disengage from a locking plate of the lock. The actuating member disengages from the clutch member and engages with the locking plate when the press key is depressed. When the lock is operated by a key, the actuating member is released from the locking plate and engages again with the clutch member.

Abstract: A coded-card type lock device includes in combination: an outer housing body for being fixed on a door; a locking unit with a sliding slot and a plurality of partitioning spaces installed in the outer housing body; a plurality of mechanically coded locking pieces movably installed in the partitioning spaces according to a selected code; an operating mechanism movably disposed under the locking unit in the outer housing body for unlocking operation; a resetting member slidingly provided around the periphery of the locking unit for resetting the locking unit to a coded lock position; a lock bolt mechanism movably installed at a front portion of the outer housing body in connection with the operating mechanism; an inner covering member secured over the back side of the outer housing body; and a card-type key having a plurality of segmented sections coded according to the code of the locking pieces for effecting the unlocking operation; and a bolt socket frame matched with the bolt mechanism and fixed on a door f

Abstract: A key box in which an inaccessible interior latch secures a drawer in place. An exposed lock can be operated to release the latch. A tumbler lock has forward and rearward tumbler receiving notches of different depths to make picking of the lock more difficult.