Abstract: An improvement for a dead bolt assembly having a dead bolt mounted movably in a bolt casing and a crank plate mounted in an extension housing at the rear side of the bolt casing to move the dead bolt upon actuation of a lock, comprises an adjustable bolt extension member which has a fixed plate member and an extensible channel member pivoted to the fixed plate member, and a crank plate mounting means which is mounted movably in the extension housing to hold the crank plate in a movable position so that the crank plate can be kept in a cooperative relationship with the extensible member.

Abstract: A push-pull door latch having a pivotally secured handle and handle support perative for rotating a cam member via a pinion member in response to pivotal motion of an elongated leg on the handle support and the engagement of a driver tab on the elongated leg with the pinion member, and with the rotational motion of the cam member driving a slide member in translation, with the slide member connected with a bolt of a bolt assembly and with the translational movement of the slide member moving the bolt to a latched or unlatched position and with the slide member moving the bolt to its unlatched position in response to pivotal motion of the elongated leg by either pushing or pulling on the handle.

Abstract: The assembly includes a door with rotatable door handle connected thereto, and a primary locking mechanism on a door hinged for opening and closing in a frame disposed in an entry way. The door includes a handle hub lock mechanism, including an actuator connected to a biasing force reversal mechanism for causing locking of the handle in a given position. The biasing mechanism preferably includes an actuator extendible from the leading door edge towards and alternatively into a recess in the door jamb. A lost-motion mechanism interconnects the actuator and the force reversal mechanism. The actuator normally extends outwardly from the door edge a significantly greater distance than the distance between the strike plate and the door edge.

Abstract: The gate comprises a damper /1/ overlapping the cross-section of a pipe-line /2/ and kinematically connected with a movable link /3/ of a drive /4/ turning it about an axle /5/ disposed on the pipe-line /2/, and a driven pin trip /12/ entering a hole made in the pipe-line and meant to hold the damper /1/ in the closed position. Secured on the damper /1/ is a bracket /8/, and in the kinematic chain connecting the damper /1/ with the drive /4/ there is an angular lever /9/ which is mounted so that it can turn through a limited angle and whose axle /10/ of turning is secured on the bracket /8/ parallelly to the axle /5/ of turning of the damper /1/. One arm of the angular lever /9/ is connected to the movable link /3/ of the drive /4/, and the damper /1/ has guides /13/ made thereon and accommodating a pin trip /12/ which is kinematically connected with the other arm of the angular lever /9/.

Abstract: A lockset includes a casing, a bolt, a spindle which can be turned for reciprocating the bolt, and a slide bar for locking the latch bolt and the spindle which are all made of stainless steel. The bolt is slidably received in a housing made of plastic such as nylon or acetal plastic which is mounted in a casing and located by positioning posts projecting from one side wall of the casing. The spindle carries a lever arm engageable with a pin projecting from the bolt to reciprocate it by turning of the spindle and a side plate of the casing has in it an aperture large enough for movement of an end portion of the spindle and the lever arm through it. The slide bar can be slid between a locking position in which it blocks reciprocation of the bolt and turning of the spindle and a released position, and such slide bar can be moved selectively either by a key lock or by a manually manipulated pin.

Abstract: A locking apparatus for a detachable sunshade for a vehicle which includes a detachable panel, a connecting pin, a sunshade detachably attached to an interior portion of the detachable panel and detachably engaged with the detachable panel at a rear portion thereof via the connecting pin, a shaft supported on the sunshade, an arm fixed to the connecting arm and the shaft, a locking handle pivotally supported on the sunshade and fixed to the shaft, a knob connected to the locking handle for rotating the locking handle and a torsion spring for biasing the connecting pin in a direction for engagement with the detachable panel.

Abstract: A door latch for latching a swingably mounted door. The latch includes a striker assembly which is operable in a dual capacity. First, the striker assembly is pivotally operable for accomplishing the unlatching action or is arcuately swung in the act of being withdrawn from the keeper socket, thus unlatching the door latch. Second, at least a portion of the striker assembly is rectilinearly operable for accomplishing the latching action as it slidably engages the lip of the keeper socket and is subsequently thrust into the keeper socket as the door continues to be fully closed thus latching the door latch. A shaft extends through the mainbody of the striker for facilitating the unlatchable swinging action thereof and which carries handle or knob structure at either end thereof to further facilitate unlatching and opening the door.

Abstract: A rotary latch mechanism for engaging a latch post, for example to latch a vehicle door to its frame. The latch mechanism comprises a rotating cam having a recess to engage or release the latch post. A torsion spring or the like biases the cam for rotation toward the position in which it releases the latch post. A latch bar sliding perpendicular to the plane of rotation of the cam is biased for slidably engaging an abutment on the cam to latch the cam in its engaged position. A handle or other release is provided to retract the latch bar, freeing the cam for rotation to its disengaged position. The mechanism is quite simple and requires only a few moving parts, yet it provides the same functions as other more complex latch mechanisms.

Abstract: A locking device for the pivotable tape cassette compartment of a magnetic tape apparatus comprising a radially open detent groove in the side wall of the cassette compartment and a cooperating detent pin on a radially movable spring-engaged detent slide. The release movement of this detent slide is obtained by means of a detent release button which is formed by a hinged integral wall portion of the flat front wall of the casing, the release button carrying on its inner side a cam protrusion in engagement with a cam follower on the detent pin. The casing of the unit and its chassis have snap-action mounting features.

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 slide bolt latch assembly includes a cam lever pivotally movable between a retracted position within the lower free swinging corner of a vehicle door and an extended position extending out of the door. A pin and slot connect the cam lever to a slide bolt for concurrent movement along a linear path between extended and retracted positions. A spring continually biases the cam lever and slide bolt to their extended positions. Movement of the door toward partially closed position engages the cam lever with the leading edge of a body mounted striker plate to move the cam lever and slide bolt to their retracted positions against the force of the spring. Final closing of the door disengages the cam lever from the leading edge of the striker plate. The spring returns the cam lever and slide bolt to extended position to engage the slide bolt with another edge of the plate and retain the door in closed position.

Abstract: A door lock has a flush-mountable body. A forwardly facing recess is defined by the body. A paddle-type handle is pivotally carried by the body and is movable between a nested position within the body recess and an operating position. A spring-projected slide bolt is carried on the back of the body and is movable between projected and retracted positions. A key-controlled disconnect linkage is provided for selectively connecting and disconnecting the handle and the bolt. The disconnect linkage includes a disconnect member which extends longitudinally along one side of the bolt and which has an end region that is shifted from side to side between connecting and disconnecting positions by a key-operated locking member. When the disconnect linkage drivingly connects the handle and the bolt, movement of the handle from its nested position to an operating position will cause corresponding retracting movement of the bolt.

Abstract: A door lock has a flush-mountable body. A forwardly facing recess is defined by the body. A paddle-type handle is pivotally carried by the body and is movable between a nested position within the body recess and an operating position. A spring-projected slide bolt is carried on the back of the body and is movable between projected and retracted positions. A key-controlled disconnect linkage is provided for selectively connecting and disconnecting the handle and the bolt. The disconnect linkage includes a mounting member which extends longitudinally along one side of the bolt and which is drivingly engaged by the handle. A disconnect member is supported on the mounting member and is arranged to be pivoted from side to side between connecting and disconnecting positions by the movement of a key-operated locking member.

Abstract: A door lock has a flush-mountable body. A forwardly facing recess is defined by the body. A paddle-type handle is pivotally carried by the body and is movable between a nested position within the body recess and an operating position. A bolt is carried on the back of the body and is movable between latching and unlatching positions. A key-controlled disconnect linkage is provided for selectively connecting and disconnecting the handle and the bolt. The disconnect linkage includes a disconnect member which is moved by a key-operated locking member between connecting and disconnecting positions located, respectively, in and out of the path of travel of a handle operating arm. When the disconnect linkage drivingly connects the handle and the bolt, movement of the handle from its nested position to an operating position will cause corresponding unlatching movement of the bolt.

Abstract: A deadlocking latch bolt in a tubular housing is connected to a tailpiece front cross head having a retainer arm in a radial window in the bolt and a blocker arm abutting the opposite housing side to maintain the connection. A deadlocking tumbler is biased to bolt deadlocking position. An auxiliary bolt, when projected, holds the tumbler in release position, and when retracted relative to the bolt, allows the tumbler to take deadlocking position. A channel-shaped tailpiece cam member engaged for linear movement with the cross head has a cam face presented to move the tumbler to release position when the deadlocked bolt is drawn rearward by the tailpiece. The bolt is movable relative to the tailpiece when thrust rearward so as to be deadlocked against the tumbler before actuating the tailpiece and its cam member, but has no lost motion when pulled rearward by the tailpiece.

Abstract: A door lock has a flush-mountable body. A forwardly facing recess is defined by the body. A paddle-type handle is pivotally carried by the body and is movable between a nested position within the body recess and an operating position. A spring-projected slide bolt is carried on the back of the body and is movable between projected and retracted positions. A key-controlled disconnect linkage is provided for selectively connecting and disconnecting the handle and the bolt. The linkage includes a disconnect member which is movably mounted on the bolt. The disconnect member is moved by a key-operated cam between connecting and disconnecting positions. When the disconnect linkage drivingly connects the handle and the bolt, movement of the handle from its nested position to an operating position will cause corresponding retracting movement of the bolt. When the disconnect linkage disconnects the handle from the bolt, movement of the handle is inoperative to cause retracting movement of the bolt.

Abstract: A door lock has a flush-mountable body. A forwardly facing recess is defined by the body. A paddle-type handle is pivotally carried by the body and is movable between a nested position within the body recess and an operating position. A spring-projected slide bolt is carried on the back of the body and is movable between projected and retracted positions. A key-controlled disconnect linkage is provided for selectively connecting and disconnecting the handle and the bolt. The disconnect linkage includes a rotatably-mounted disconnect member which extends longitudinally relative to the bolt. Interengageable formations are provided on the bolt and the disconnect member. The interengageable formations are brought into and out of driving engagement by the movement of a key-operated locking member. When the disconnect linkage drivingly connects the handle and the bolt, movement of the handle from its nested position to an operating position will cause corresponding retracting movement of the bolt.

Abstract: A door lock has a flush-mountable body. A forwardly facing recess is defined by the body. A paddle-type handle is pivotally carried by the body and is movable between a nested position within the body recess and an operating position. A spring-projected slide bolt is carried on the back of the body and is movable between projected and retracted positions. A key-controlled disconnect linkage is provided for selectively connecting and disconnecting the handle and the bolt. The disconnect linkage includes an operating member which is pivotally mounted on the body at a location behind the handle, a key-control which is carried on the handle, and a disconnect member which is carried by the key control for movement into and out of driving engagement with the operating member. The operating member has an arm which extends through an opening formed in the back of the body and into driving engagement with the bolt. A two-piece guard shields the members of the disconnect linkage from access by would-be intruders.

Abstract: A mortise-type deadlock for hingedly-mounted doors and windows where a locking block engages the lock tongue in the extended position. A pivotally-mounted stop lever on the locking block engages an abutment in the lock body to prevent the locking block being shaken free of the lock tongue. The lock tongue may be reversible and may be removed from the lock body by operating a stop member operable from the exterior of the lock body.

Abstract: A device is disclosed for locking a grate or the like to its receiving frame to make difficult the removal of the grate by an unauthorized person utilizing a makeshift tool. The locking device has a spring loaded latching pin carried by supports secured to the grate. The shoulders provided by either a necked portion of the latching pin or by a flange on the latching pin serve to prevent the unlatching of the latching pin against the biasing of the spring by the use of a makeshift tool. In some embodiments the shoulders are inclined at an angle with respect to the longitudinal axis of the latching pin to encourage the slippage of a makeshift tool off from said shoulders to thereby prevent the unlatching of the pin by an unauthorized person using a makeshift tool. In some embodiments, the unlatching hole in the grate is offset from the locking device to prevent the inspection of the locking device by an unauthorized person seeking to discover the manner of operation of the locking device.

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: The latch bolt assembly makes use of a metal latch bolt head in which is positioned an anti-friction insert extending entirely through a slot in the head from the angled face to the straight face. For holding the insert in place there is a slot in the inside end of the insert engaged by the head on a rod which projects into the inside end of the latch bolt head, in that way to secure the respective parts in interlocked relationship.

Abstract: A paddle handle lock bolt includes a bellcrank retractor or trigger member which constitutes the central element of a three element drive train comprising a paddle handle, the bellcrank retractor, and a spring-loaded slide bolt. The bellcrank retractor can be selectively coupled to the paddle handle for selectively drivingly engaging the spring-loaded slide bolt in the retracting direction.

Abstract: A latch assembly for use on a closure, e.g. a sash, the assembly comprising a housing from which a slidable, spring-biased latch bolt extends, an actuating handle pivotally mounted at one end in the housing for pivotal movement in a plane parallel to the plane of movement of the bolt and having an opposite end portion extending from a portion of the housing spaced from the portion of the housing from which the bolt extends and a pair of bolt-lifting levers pivotally mounted intermediate their ends within the housing, one end of each lever being engagable with the bolt and the opposite end of each lever being engagable by a projection on the handle intermediate its ends for withdrawing the bolt. When the handle is pivoted in one direction, one lever is engaged and lifts the bolt whereas when the handle is oppositely pivoted, the other lever is engaged and lifts the bolt. The levers are free to pivot when the bolt is pushed inwardly from externally of the housing.

Abstract: A locking mechanism for a swingably mounted flight control surface member of an airplane, such as a rudder, which is embodied in a unitized frame structure that can be applied to either new or existing airplanes, which includes a bracket mounted assembly arranged for mounting within an enclosed portion such as the tail cone, in a position wherein a reciprocable locking bolt may be manually selectively moved by an outside ground attendant to a projecting position in locking engagement with a keeper carried by an adjacent part of the flight control member, and to a released retracted position. The bolt is connected to one end of a rocker arm carried by a rotatable shaft having an end extending to the exterior of the enclosed portion, and being arranged for releasably receiving an actuating tool.

Abstract: A flush-mountable, key-controlled, handle-operated door lock is provided with an automatic self-locking linkage for permitting the handle to move once, but only once, out of a nested position after a key control has been operated to "cock" the linkage. Once the linkage has been cocked, the handle can be moved one time out of and returned to its nested position, whereafter the linkage operates to retain the handle in its nested position until the key control is again operated to cock the linkage. The automatic latching linkage includes a housing assembly, a pair of cams, and a pair of springs. A feature of the automatic latching linkage is that its several components can be assembled easily on an existing, in-service lock to provide the existing lock with a one-trip automatic locking capability. The latching linkage components are assembled by installing the components one at a time in an essentially stacked arrangement, one atop the other.

Abstract: This invention relates to a door lock, and particularly to a lock whose latch bolt extends beyond what is considered normal extension for a door lock. This invented lock not only fastens the door closed, but it also has a second function; namely, to act as a dead lock.

Abstract: A door lock comprising a bolt disposed to slide axially in a frame, an outer door handle which includes an actuator extending into a cavity in the bolt, a latch disposed in the bolt cavity to slide laterally of the bolt axis between an unlock position adjacent the handle actuator and a lock position spaced laterally therefrom, and means selectively to position the latch in either the lock or the unlock position.

Abstract: The invention relates to a safety latch assembly for a warehouse type door that has rollers riding in a vertical guide track, such track having latching holes at various points along its length. The latch assembly has a latch pin with a roller end spring biased toward the track, and rides on the track with the door until it comes into latching engagement with one of the aforementioned holes, and locks the door into its current position. Withdrawing the latch pin from the hole resets the bias spring as the door becomes unlocked.

Abstract: A latch is provided for a door of a cab of a vehicle, such as a track loader, or the like. The latch is provided with external actuating means, internal actuating means and a third override actuating means, the third override actuating means being operative even though either or both of the internal and external actuating means are inoperative.

Abstract: The bolt of a door latch or lock is made laterally adjustable to ensure both proper latching operation upon closing the door and also reasonably firm engagement of the catch with the fixed stop to ensure firm holding without vibratory or rattling movement. The adjustment is accomplished by adjusting the angle of emergence of the bolt with respect to the latch structure, e.g., the bolt case. The adjustment capability allows greater tolerance in the mounting of the latch upon the door.

Abstract: An improved latch structure for releasably locking a door to a cabinet including switch structure for permitting operation of electrical apparatus associated therewith to be operated only when the door is in the latched closed position. The switch is hidden within the door behind the latch bolt so as to be operated substantially only by the strike which has a preselected configuration to effect the latching and switch operating operations. The bolt may be operated manually to release the door from the latched condition, and in the illustrated embodiment, an improved pivotally mounted operator is provided for effecting the desired unlatching movement of the bolt.

Abstract: A latch including a handle operative only in response to a grasp-like pull. In a preferred embodiment, the handle comprises a rod bent into a general C-shape to provide a pair of ends. The handle is pivotally mounted. Operation of the handle pivots a first handle end in an arc to move a latch bolt approximately parallel to the chord of said first handle arc to move the latch bolt from an engagement to a disengagement position. The second end of the handle normally closely abuts the latch casing to preclude operation of the handle by a push.