Abstract: An improved coupler or hitch assembly of the latch plate type. Angled jaws on the coupler act together with ramps or angled arms on the equipment secured by the coupler to forgive vertical or horizontal misalignment during the coupling operation. The assembly has an automatically engaging latch plate which is held in a closed position by a lock pin. The lock pin also provides frictional restraint for holding the plate in an open position. A lock pin holding mechanism allows relatively unresisted movement of the latch plate from an open to a closed position. Movement of the latch plate is also controlled by a limit tab on the coupler to prevent the lock pin from interfering with the coupler operation.

Abstract: A door latch employs removable standoff posts in a concealed mounting, and a lockable latching mechanism which includes a locking slide manually actuatable from the inside of the door and movable from the locked to the unlocked position by a rotary cam member connected to a key-operated lock cylinder on the outside of the door with a forked one-piece operator shaft spanning the rotary cam member to interconnect the inside handle and the outside knob.

Abstract: A gate lock of the oarlock type having a locking member fixed to a collar at the end of the collar having the oarlock hingeably mounted thereto. The lock member is a push button lock having a lock bar which extends to engage the oarlock to hold it in the locked position. The lock member always remains fixed to the device in an operable position so the lock may easily be engaged.

Abstract: The invention concerns a lock for doors or windows, with two latches each pivoting about a pivot pin being provided in the one component and of which the mutually facing ends in the locked position engage in mutually opposite directions an undercut surface of a locking bolt mounted on the other component, this locking bolt cross-sectionally being a wedge-shaped or conical tip by means of which the two latches can be forced apart against the opposing force of a spring, this lock being designed so that unauthorized forcible opening in the absence of a key is at least made appreciably more difficult.

Abstract: A latch means adapted to lock the luggage, attache cases or the like, comprising two actuating members abuttingly mounted on a same plane, the abutting edges thereof being connected separately to two parallel pivot pins. The two actuating members are movable in opposite directions under the external force, the outer edge of one of the two members is depressible under the external force applied thereto while that of the other of the actuating members can be lifted up. A sliding member is movable in between the two actuating members under the action of the second actuating member, and with the change of position of the sliding member, only when the first actuating member is depressed, can the second actuating member be lifted up thereby permitting the latch bolt to be released from the corresponding hole and the latch means is then in an unlocking position.

Abstract: A lock device for a hinged cargo door of a truck trailer has a housing with a vertically extended groove in one side wall for receiving the rotatable cargo door lock bar. A transversely extended lock pin in the housing is transversely movable through an opening in the same side wall for insertion into a registered hole in the cargo door lock bar in the locked position thereof. Transverse movement of the lock pin is controlled by a simple lock mechanism including a key operated lock shaft having a rocker arm rotatable therewith and having a free end connected to the lock pin for transverse movement of the lock pin in response to rotation of the lock shaft.

Abstract: A vehicle body door lock includes a fork type bolt and a sliding detent member which moves between detent and undetented positions with respect to the legs of the bolt. The detent is slidably mounted in a plastic housing located within a box type frame of the lock. A compression spring biases the detent to detented position, with the detent being located by engagement of a shoulder of a plastic cap thereon with a stop mounted on the housing. A release mechanism for the detent includes an intermittent member movable between locked and unlocked positions with respect to another shoulder of the plastic cap of the detent through inside and outside release members.

Abstract: A gate latch device shown for swinging and sliding gates. In the swinging gate embodiment, a latch bar rides over a strike plate until a notch in the latch bar is engaged. A pin is simultaneously depressed by contact with the strike plate which releases a latching pin or bolt to immobilize the latch bar until a manual release is effected from a visually non-obvious location. For a sliding gate, concentric mutually slideable tubular members are provided, one mounted to the sliding gate and the other carrying an articulated jaw which engages a pin or bolt on a fixed structure on a fixed structure to which the gate is closed. A combination lock is adapted to lock the tubular members together.

Abstract: Structure for mounting a door to a cabinet for selective opening of the door from either side of an access opening provided in the cabinet. The door mounting structure includes hub portions which are removably associated with the hinge pins mounted on the cabinet. Positive locking structure is provided for positively maintaining the hub structures associated with the hinge pins about which the door is swung to prevent complete separation of the door from the cabinet. The positive locking structure includes a rigid element which is urged into interfering relationship with the hub structure associated with the cabinet hinge pin about which the door is being swung to prevent repositioning of that hub structure from a closed pin-engaging disposition to an open disposition wherein the pin is released. Overcenter detent structure is provided for maintaining the separable portions of the hub structure selectively in the opened and closed positions.

Abstract: A latch assembly for use in combination with slidable doors is disclosed. A rotatable disk is connected to the door so that the plane of the disk is perpendicular to the door and parallel to the direction of door movement. A lock bolt which projects from the door jam is adapted to engage a slot in the disk as the door closes, causing the disk to rotate. As the disk rotates, it slides with respect to a spring loaded latch bolt until the bolt slides through a second slot in the disk, when the door is fully closed. Efforts to effectuate a forced entry of the door cause the resulting forces to be passed primarily between the disk and the lock bolt, while the latch bolt's primary function is to prevent rotation of the disk. Thus, an attempted forced entry will not cause excessive forces to be placed on the latch bolt. The latch bolt is slidably connected to a conventional manually operated garage door handle assembly including a lock.

Abstract: Door-barring lock apparatus has a bar member rotatably mounted to the wall near the doorway. When in a transverse or generally horizontal position, this bar member projects into the doorway for engaging the inside of the door near the opposite margin from the hinges for advantageously, positively barring the door against opening inwardly. By manipulation of a handle located inside of the building near the bar member, a person inside of the building can de-couple the bar from a locking rod extending through the wall to the outside of the building. Such de-coupling enables the person inside of the building to rotate the bar into an upright position for freeing the door to allow the door to be opened, regardless of whether this rod is locked against rotation. A lock assembly accessible from the outside of the building normally serves to lock the rod against rotation for normally locking the bar member in its transverse door-barring position.

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: The assembly is for use with closures located in top and bottom tracks, wherein at least one of the closures is slidable in the tracks between an open and a closed position. The assembly includes an elongated rod member which is swingably attached to the top track and has up and down positions. The assembly is designed such that when the rod member is in the down position, it extends between the edge of the slidable closure and the side of the opening in which the closures are located. This prevents the slidable closure from being moved from the closed to the open position. The security latch assembly also includes a latching assembly which is attached to a wall adjacent to the closures. There is an extension member which is attached to the rod member and extends beyond the closures to the latching assembly. The extension member engages the latching assembly and holds the rod member in either the up or down position.

Abstract: The anti-theft device comprises essentially a movable vertical plate extending through an opening formed in the rain-strap overlying the doors of the container; this plate is adapted to drop by gravity to a position in which it is located behind lug extensions of the upper ends of the lock rods associated with each door panel to prevent the opening movement of the rods as long as the movable plate is not raised to a position overlying the lugs, this movable plate being rigid with a horizontal cover plate disposed on top of the container and prevented from being raised to a height sufficient for releasing the rods by another stacked container.

Abstract: A rotary latch having drive means rotatably mounted in a housing, said dr means having a semi-circular hooked-shaped latch arm thereon. A cover is attached to said housing and an axially mounted, spring-biased shaft is concentrically mounted within said drive means and has locking lugs engageable with said drive means and said cover. In one axial position of said center shaft, said drive means is locked against rotation and, in another axial position, the drive means is unlocked and free to rotate. A stop is provided on said drive means and is engageable with said housing to limit rotation of latch arm.

Abstract: The security device of the present invention is mounted in the floor of a building adjacent the hinge side of a door to be made secure. The security device has elements which can be elevated from their storage position to engage against the inner face of the door to prevent the door from being opened beyond a minimum amount. A lock is provided for holding the elements in their elevated position.

Abstract: A lock remote control device comprises a lock assembly and a manipulatable unit positioned spaced a distance from the lock assembly. The lock assembly includes a latch lever for selectively locking and unlocking a movable structural element, a first biasing spring for bringing the latch lever in position to lock the movable structural element. The manipulatable unit includes a movable member connected through a latch cable to the latch lever and movable between projected and retracted position, and an actuator operable to permit the movable member to move from the retracted position towards the projected position to bringing the latch lever against the first biasing spring in position to unlock the movable structural element when an external pushing force is applied thereto, but to block the movement of the movable member in the retracted position during the absence of the external pushing force. This movable member is normally biased to assume the projected position by a second biasing spring.

Abstract: A lift truck load-handling attachment having an integral quick-disconnect hook for permitting quick mounting or demounting of the attachment on a lift truck carriage. The hook comprises a lug for engaging the lower attachment mounting bar of the lift truck carriage, the lug being permanently mounted rotatably upon a rearwardly-protruding stub shaft affixed permanently to the frame of the attachment. The lug may be rotated between an engaged position, in which it engages the lower support bar, and a disengaged position. A pin is slidably mounted for selectively locking the lug in its engaged position when the pin is in a first slidable position relative to the lug. In a second slidable position, the pin no longer obstructs rotation of the lug, permitting disengagement thereof from the lower support bar. The pin cannot be detached from the hook assembly or load-handling attachment under any condition, nor can it be moved to its first slidable position unless the rotatable lug is rotated to its engaged position.

Abstract: A latch handle of the type having a lever which rotates about a shaft normal to one end is locked by a key-controlled pin engaging the second end of the lever.

Abstract: A locking arrangement for side dump discharge doors of a hopper car includes a keeper arrangement for receiving a rod type latch element with the keeper comprising a cylindrical housing containing a locking rotor. The rotor includes an open end slot which captures the latch element and rotates between locked and open positions.

Abstract: A gate latch of the type incorporating a pivotally mounted yoke in a latch body and a remote latch actuator handle is provided with an actuator pin and latch body relationship that further restricts the operation of the latch to operation by depressing the actuator handle. A recess in the latch body receives a horizontal segment of the latch pin in the latched position. Repeatable actuation of the latch and proper relatching on closure of the gate is assured by frictional relationship between the terminus of the latch pin and the underside of the latch yoke. The latch pin has a relatively large area in contact with the yoke during operation so that lower hardness materials may be employed. A hardened tapered bushing in the yoke is utilized to insure, capture and entry of the latch pin into the latch bore. The latch operator includes an integral stop to limit the travel of the latch pin so that relatching is assured.

Abstract: A latch assembly comprises a bolt unit mounted in a frame member of a door or window sash, and first and second bolt-driving units installed one on each side of the door or window sash. The bolt unit has a latch bolt supported by a rotatable hollow shaft, the bolt being pivotable between projecting and retracted positions by rotation of the hollow shaft. The first bolt-driving unit includes a first driver torque bar having one end spring-biased for insertion into the hollow shaft for driving engagement therewith. The first driver torque bar can be turned about its longitudinal axis by a handle. The second bolt-driving unit includes a second driver torque bar having one end spring-biased for withdrawal out of driving engagement with the hollow shaft. The second driver torque bar can be turned about its longitudinal axis by a knob. The handle is pivoted to actuate the latch bolt for normal latching and unlatching operation.

Abstract: A sliding vent, such as a door or window, is slidable in a plane parallel to a fixed vent having a bottom rail of channel construction including a vertical panel adjacent the path of the sliding vent. A rectangular opening is cut through the panel into which is inserted and snap-fitted a housing having two parallel vertical walls extending into the interior of the fixed bottom rail. A stop plate is pivoted on the bottom edge of the opening and is rockable between an unlocked position in which the sliding vent clears the stop plate and a lock position in which the sliding vent is prevented from further movement by abutment of the bumper stile of the sliding door or window against the stop plate. In the lock position, a spring biased pin protudes from the stop plate and abuts the fixed bottom rail, thus preventing the stop plate from being moved to unlocked position.

Abstract: A container with hinged doors is provided with an improved locking bar arrangement including square and rectangular locking bars. The locking bars are rotated between open and locked positions by a locking pin or hinged handle which is removable from a bar interlock position to selectively engage apertured tubular gathering members provided on the bars for rotating them into the positions selected. Slide bolt assemblies also are movable into locking engaging position with the bars. The bars include camming means and keeper members are provided on the container which facilitate the opening and closing of the doors and which with the associated structure contributes to the total strength of the door assembly and in the stabilization of the container.

Abstract: A security latch for use with a pivotable door comprising a long hinge on the door frame with a notched edge, a slidable and rotatable bolt having pressure fingers for restraining the hinge bolt retention means on the door, the bolt restricting hinge motion, the combination restricting door motion; and a decorative protective cover.

Abstract: A safety lock for a centrifuge prevents the opening of the rotor housing if the rotor is in operation and conversely prevents the rotor from being operated if the rotor housing is not latched and locked. A plunger linked to a cam follower is used to lock a door latch and to sense its latched or unlatched condition. The position of the cam follower and hence of the plunger is sensed by plural switches. The cam follower is biased by a spring to normally urge the plunger into a locking position with the latch. A drive cam, actuated under the control of the plural switches, withdraws the plunger to unlock the latch and releases the cam follower to permit the plunger to snap into a locking position.

Abstract: A box car anti-pilferage device for plug doors mounted a sufficient distance above the rail whereby the device is usually beyond the reach of thieves standing on the ground in a railroad yard. The device includes a first plate having at least one opening therein mounted upon the door, and a second, movable plate having at least one opening therein mounted upon the plug door operating rod. The second plate obtains a position adjacent but spaced from the first plate when said box car door is in closed position. A locking member is mounted upon one of the first and second plates, and is biased toward a locked position passing through the openings in the first and second plates. The locking member is manually movable from said locked position to an open position out of engagement with one of the openings. A stop maintains the locking member in the open position during initial rotation of said operating rod from a door closed position toward a door open position.

Abstract: A crank drive assembly for sliding roof mechanisms of automobiles, in which a hand-operated crank drives a push-pull cable, the assembly including a releasable clutch between a drive shaft and a drive pinion transmitting the crank motion to the drive cable, and an arresting mechanism blocking the pinion, whenever the clutch mechanism is disengaged. The clutch mechanism and the arresting mechanism are simultaneously operated by a pivoting motion of the drive crank.

Abstract: A swivel bar is mounted on a door jamb to swing between a position in the path of the door to block its opening and a position retracted out of the path of door-opening movement. The stop bar can be held in door-blocking position by engagement of a rib-and-groove latch. The stop bar can be moved into latch-engaged position by swinging of a keeper to move cooperating cylindrical or edgewise cams relatively which movement shifts the stop bar into latched position in opposition to the force of a latch-releasing spring. .Iadd.