Abstract: There is disclosed a knob control arrangement or system whereby the status of a knob associated with a lock mechanism can be controlled from exteriorly of the lock housing and can be selectively rendered active-operable or passive-inoperable. In this regard, when in the passive-inoperable condition, the knob will merely rotate relative to the housing without imparting force or stress to the lock components. This mode of operation is achieved by providing a knob hub rotatably mounted to the lock housing to which a knob member may be affixed. Interiorly of the housing, the knob hub will move relative to a main cam member used to effect operation of the lock mechanism. The knob control arrangement includes means for selectively interconnecting and disconnecting the knob hub and the main cam member, such that when connected, an active-operable condition is attained, and when disconnected, the passive-inoperable mode is achieved.

Abstract: A paddle handle actuated latch mechanism has the paddle handle pivotally mounted within a recess formed in a rectangular tray. A bolt is mounted in a housing attached to the back of the tray. A slide bar mounted in the bolt housing is connected to the bolt and has a portion which projects through an opening in the tray and is engaged by the handle when the handle is actuated. The lock bar is connected to the bolt such that when the paddle handle is moved from a stored position to an operated position, the slide bar moves from a locked position to an unlocked position which moves the bolt from an extended position to a retracted position.

Abstract: A door lock comprises a latch and a mechanism for locking the latch which includes a pivotal element having at least one arm engageable with the latch to withdraw it to the open position a locking bolt depressable to move into a blocking position to prevent to swivel the pivotal element to withdraw said latch, and a key-operable unlocking lever for moving the locking bolt out of the blocking position to permit to swivel said pivotal element, the lever having a catch operable by the key.

Abstract: A latchbolt rim lock of simple sturdy construction with smooth effective operation and long life. A die cast case forms guides for a bolt having a head and draw plate, and has U-shaped ribs on its rear wall to define seats for springs biasing the bolt forward, in which the springs are held by a rear flange on the back plate. A rearward boss on the front wall forms a retraction stop for the bolt and contains a headed holdback plunger which is manually movable into a hole in the bolt where it is latched by its head to hold the bolt retracted. The draw plate contains a cam opening which defines opposite cam faces which are engaged by a crank pin to retract the bolt. The cam opening also has a central pin-passing throat which allows cammed retraction of the latchbolt relative to the crank pin, and defines supplemental cam faces for moving the bolt to release the holdback plunger.

Abstract: There is disclosed a lock mechanism that has been designed to take up a minimum amount of space and thus be accommodatable in a relatively shallow structure. Said lock mechanism includes a pivotally mounted latch bolt, a deadlock member associated with said latch bolt, with biasing means urging said deadlock member to a locking position. To control the operation of the deadlock member there is provided a deadlock trigger and a deadlock position lever providing an operational connection between said trigger and the deadlock member. A primary operating lever as provided comprised of a first pivotally mounted arm portion and a second arm portion integral therewith and connected with the latch bolt by a loss motion connection. The pivot axis for said latch bolt, said primary operating lever and said deadlock member are disposed parallel to and adjacent the front plate of the casing structure, thereby enabling the lock mechanism to be accommodated and to function within a shallow casing structure.

Abstract: A flush mountable door lock includes a recessed body member, a lock bolt slidably mounted on the body member, and a paddle-shaped operating handle for moving the bolt. The handle is movable between nested and projected positions. A bolt actuator extends from the handle into a receiving formation provided on the bolt for drivingly interconnecting the handle and the bolt to effect retracting and extending movements of the bolt when the handle is moved toward its projected and retracted positions. A torsion coil spring is interposed between the body member and the handle, and serves the several functions of biasing the handle toward its nested position, maintaining play-free engagement between the handle and the body member when the handle is nested, and maintaining a play-free driving connection between the handle and the bolt when the handle is projected.

Abstract: A door latch particularly for use in mobile homes or recreational vehicles. A housing having a channel formed therein is mounted on one surface of a door overlying a passageway therethrough. A spring-loaded slidable latch engagement member is positioned within the channel for operating engagement with a striker plate mounted on the jamb of the frame against which the door abuts when closed. A latch retaining pin is positioned through the housing and has a shaft part extending within the passageway in the door for receipt on the other side of the door surface of an operating knob or handle secured thereon. Rotation of the operating knob actuates the pin to disengage the latch engagement member and thereby unlatch the door. A lockable abutment member may be positioned upon the door surface or an extension part of the housing to block the path of the latch engagement member when moved toward disengagement position and thereby prevent such disengagement.

Abstract: This invention relates to a locking device having a latching element movable between a locking position and an inoperative position, operating means for moving the latching element, a blocking member movable to a blocking position for mechanically preventing the latching element from moving to its inoperative position. According to the invention, a plurality of thermally responsive elements are arranged or are individually bendable to form thermally responsive holding means for adopting a holding condition to temporarily hold the blocking member in the blocking position and, preferably, also to form thermally responsive safety means for normally adopting an inoperative condition.

Abstract: A latch mechanism is mounted on a door or panel hingedly mounted on the frame of a construction vehicle or the like. The latch mechanism comprises a handle pivotally mounted in exposed relationship on an upper side of the door for movement between latched and unlatched positions thereon. A guide block is secured to an underside of the door and a latch member is slidably mounted in the guide block. The latch member is connected to the handle for sliding movements between a latched position underlying a stationary panel of the vehicle and an unlatched position whereby the door may be opened in response to raising of the handle. Detent means are provided between the guide block and the latch member to hold the member in its unlatched position when the door is open. A key lock may be mounted on the door to selectively hold the latch member plate in its latched position.

Abstract: This electronic combination lock is operated by depressing the proper combination of pushbuttons mounted on the faceplate of a circular handle, then rotating the handle to open the bolt. The pushbuttons are held outwardly by radially extending spring wires within the handle that also provide electrical connection, when a pushbutton is depressed, to inclined contacts mounted to the rear of the faceplate. Electrical leads extend through a hollow shaft connected to the handle.The bolt is restrained in the locked position by a magnetically actuated locking pin which projects into a bore in the bolt. The shaft is connected to the bolt by a spring. When the proper pushbuttons are selected, electrical circuitry disclosed herein actuates the magnet, removing the pin and permitting the bolt to be opened by handle rotation. If the wrong combination is depressed, an alarm signal is produced, the magnet is not actuated, and rotation of the handle expands the spring without moving the bolt.

Abstract: A lock device comprises a latch bolt assembly movably mounted for movement from a closed position to a open position. A combination lock system is operatively connected to the latch bolt for retentively engaging the latch bolt against movement to its open position, and for releasing the latch bolt assembly in response to a predetermined rotational movement of a dial on the lock mechanism. A handle or knob is operatively connected to the latch for opening the latch whenever the lock mechanism has released the latch. A reset mechanism is connected to the knob and also engages the lock mechanism so as to reset the lock mechanism each time the handle opens the latch whereby the lock mechanism will automatically move into retentive engagement with the latch bolt after the latch bolt has been opened.

Abstract: The locking device includes a support having a first plate rotatably mounted thereon. Four radially extending locking bars are rotatably mounted on the first plate such that the rotation thereof moves the bars between locked and unlocked positions. A second plate movably mounted on the support between first and second positions is provided with means engagable with the first plate to prevent the rotation thereof when the second plate is in the first position. A projection is mounted on the lock cylinder and is movable with respect thereto along an arcuate path upon actuation of the cylinder. The projection is engagable with the given portion of the first plate to rotate same as the projection is moved.

Abstract: A lockset has a die cast, monolithic body pivotally supporting a lever handle which upon actuation and through fingers engages tabs of a lock bolt assembly for selective linear retraction of the latter. A rotatable knob carried by the body through a spindle and a guide plate mounts a cam plate which acts, upon rotation of the knob in either direction, to retract the bolt assembly. The bolt has opposed U-shaped guides which receive the guide plate and guide the bolt laterally and vertically. A lock has a lock lever which positively engages the bolt assembly to lock the latter in place. A follower lever and the lock lever are pivoted about a common axis. The follower responds to a barrel lock between two positions to lock and unlock the lock lever from the bolt assembly. The lock lever also responds to a latch pin independently of the follower on the opposite side of the lockset from the barrel lock, to lock and unlock the bolt assembly.