Abstract: A retractable safety latch is disclosed and includes a base mounting member having perpendicular base walls, a draw bar guide attached to the mounting base member by a hinge, a draw bar having an arcuate hook on one end and an eccentrically positioned oblong hole on the other end slidably mounted on the draw bar guide, a rotatable shaft mounted on the draw bar guide and having an eccentrically mounted pin extending through the oblong hole for driving and retaining the draw bar in the draw bar guide, and a handle having a safety catch pivotably mounted on the rotatable shaft. Between the handle and the rotatable shaft is a spring for the purpose of biasing the handle in one direction with respect to the rotatable shaft so that when the latch is closed, the handle is in contact with the perpendicular base walls and the safety catch catches on one of the perpendicular base walls to prevent the rotatable shaft on which the handle is mounted from rotating and opening the latch.

Abstract: An operating handle mechanism for remotely actuating a closure latch including a handle mounted on a housing by a pivot. A coil spring anchored on the pivot has a first end seated on the housing and a second end seated on the handle to bias the handle to a normal unactuating position. A yieldable plastic button member mounted on the housing projects into the path of movement of the second end of the spring during actuating movement of the handle. During movement of the handle to the actuating position the second end of the spring is carried into engagement with the yieldable plastic button member and is temporarily unseated from the handle, and then snaps past the button member to again seat on the housing during further movement of the handle to the full actuated position, thereby providing a perceptible audible and tactile signal to the operator confirming actuation of the handle and the remote latch actuated thereby.

Abstract: A check rail lock having a housing with an interior space rotatably mounts a shaft connected to a handle and a cam and with stop members associated with the cam and the housing for limiting rotation of the cam between locked and unlocked positions. The cam is releasably held in either of these positions by mounting of a spring washer on the shaft to which the cam is fixed, and with the spring washer and the housing having coacting detent structure which releasably holds the cam in either the locked or unlocked position.

Abstract: A latch device comprises a casing secured to a body with a door hinged thereto and a slide to be pushed, when the door is closed, by a strike projecting from the back side of the door into the casing so that the door is held closed with the strike retained in the slide. The slide has a heart-shaped cam groove formed in the top surface. A latch pin is provided with its one end received in the cam groove and its other end rotatably fitted in the casing. The one end of the latch pin is adapted to trace the cam groove with the movement of the slide, and is urged against the bottom of the cam groove by a retainer spring.

Abstract: A two-part latch comprising hinged bail and crank for latching a globe and ring assembly to a fixed housing requires no screws, rivets or similar discrete fastening means. The crank member is a rectangular link formed from a length of resilient wire having its ends butted together at a split near the middle of one side. It is inserted into a captivating recess in which a pair of side ramps and a cut-off center ramp engage opposite faces of the link and cause the portions on each side of the split to twist and snap back after passing beyond the cut-off, whereby the crank is permanently captivated in a hinged attachment.

Abstract: A housing part is engageable with a side wall of a housing, and latched to the housing by at least two latching noses on the housing part near another side wall of the housing. At least two latching springs engage with latching noses on the housing part. Each latching spring is additionally biased into engagement with the latching nose by a rubber buffer which is inserted into a space between the spring and the outer housing wall, this rubber buffer being formed as part of a housing foot.

Abstract: A latch mechanism comprising a latch plate spring biased to a central position by a coil spring located in an opening in the plate. Ends of the spring are held against two stationary pins which extend through arcuate slots to guide the plate.

Abstract: A leaf spring bent at its midsection to form operating legs spaced about 120.degree. apart. The legs can be compressed together with finger pressure and the spring then inserted over a defective coil spring of Corvette door latch/handle assembly. When fully inserted the spring functions in the same way as the original spring before same became damaged.

Abstract: A recentering device for a shaft is disclosed which includes a return spring means and a recentering spring. The return spring applies a torque which varies directly with the angular displacement of the shaft from the center position over a predetermined range corresponding to the full operating range of the shaft. The recentering spring means applies a torque which varies inversely with the angular displacement of the shaft over the range of displacement. The maximum torque exerted by the recentering spring means is not substantially greater than the maximum torque exerted by the return spring. The torque exerted by each of the springs is a substantially linear function of angular displacement whereby a substantially uniform value of torque tends to return the shaft to its center position and thereby provides accurate recentering when the shaft is released.

Abstract: The assembly includes a door with rotatable door handle connected thereto, and a primary door locking mechanism. The door is hinged for opening and closing in a frame disposed in an entry way. The door includes a handle hub lock having a hub locking plate around the handle hub, a protrusion extending from the locking plate, a bolt member having a recess adapted to receive the protrusion, a bolt biasing mechanism, and a biasing force reversal mechanism for causing the bolt member to move in a direction opposite to the direction in which the bolt biasing member moves. The biasing mechanism preferably includes a plunger extending from the leading door edge toward the door jamb and biasable thereby, during door closing, against the bolt to move it into the locked position, and a spring connected to each of the plunger and bolt member. In one embodiment, magnets magnetically bias the slide bolt member to the desired locked or unlocked position.

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 assembly includes a door with rotatable door handle connected thereto, and a primary door locking mechanism. The door is hinged for opening and closing in a frame disposed in an entry way. The door includes a handle hub lock having a hub locking plate around the handle hub, an elongated slide bolt supported to movement into and out of a recess in the locking plate and a bolt biasing mechanism. That biasing mechanism preferably includes a plunger extending from the leading door edge toward the door jamb and biasable thereby, during door closing, against the bolt to move it into the locked position, and one or more springs connected to the plunger. In one embodiment, one or more electromagnets selectively magnetically bias the slide bolt to the desired locked or unlocked position. The assembly is simple and effective.

Abstract: An improved mortise lock is provided with spring means for independently returning each of the inside and outside lever handles from a rotated operating position. Inside and outside operating hubs are independently rotatably mounted in the case. A retraction lever extends from a pivot past the hubs and into retracting engagement with the tailpiece of the latch bolt. Rotation of one of the operating hubs causes a cam flange thereon to engage the retraction lever to pivot the retraction lever rearward to retract the latch bolt. In one embodiment, a complementary pair of inside and outside hub bias arms are pivotally mounted in the case in side-by-side relation. Each bias arm is biased against its companion hub to return the hub from a rotated lock-operating position. In another embodiment, a single hub bias arm is biased against either the inside or the outside hub.

Abstract: A door handle mount for a door having a rotatable spindle for operating a latch includes a lever handle cantilevered on the spindle and a trim plate having a spring resiliently biasing the spindle to seek a home position. The home position sought by the trim plate spring may be changed by relocating a movable stop. The user selectively biases the home position of the spindle to accommodate the cantilevered weight of the lever handle, to alter the bias from one direction to the other, or to temporarily cancel the bias during installation of the latch mechanism and trim.

Abstract: A door locking device for a microwave oven of the present invention has a latch disposed on the rear surface of a door and pivoted clockwise by the urging force of a spring, and an engaging portion which stops a hook at the distal end of the latch. Upon closing operation of the door, the hook engages with the engaging portion to lock the door. For opening the door, a lock release actuator is moved upward to pivot the latch upward to release the locking state of the latch with the engaging portion.

Abstract: In a door lock with two case parts disposed in parallel opposed relationship the follower designed as an injection molded synthetic resin part is resilient in itself owing to a supported follower portion, the spring for the spring bolt and for the tumbler being formed by a base structure (42, 42a) and the support for a fitting to be mounted later on being offered by sleeves (14, 15) which are provided above and below the follower both at the lock case bottom and at the inside of the lock cover.The spring-like action of the follower is achieved in that the bent follower leg (26) slidingly bears against an inclined supporting surface of an abutment (27) while curving inwardly or outwardly upon radial movement of the follower.Good fit of the lock in the pocket provided in the door is achieved by ribs (11, 12, 13) on the outer surfaces of the lock case.

Abstract: In a door lock with spring bolt and dead bolt the lock follower body injection molded from thermoplastic synthetic resin is rotatably mounted in the lock case and resilient in itself without bias and without being influenced by any spring force when by radial movement of the lock follower body a plurality of legs extending therefrom bears against retaining pins and develops spring action by bending.The required spring load on the tumbler is effected by the provision of a free leg at the tumbler which rests unbiased against a stop pin and resiliently bends upon actuation by the key. The mounting of a door fitting at the door panel is facilitated by bores through sleeves provided in the lock case.The inexpensive fabrication permitting at the same time a maximum possible degree of dimensional precision is achieved by making both the lock case and the interior parts from thermoplastic synthetic resin containing no plasticizer. Preferably a polyacetal is used for the interior parts.

Abstract: A door actuator for a commercial vehicle includes a mechanism which biases the handle to a stored position and a latch which maintains the handle in the stored position. A key operated lock mechanism cooperates with the latch to lock the handle in the stored position.

Abstract: There is disclosed a releasable door stop assembly for a bidirectionally swinging door including a retractable stop member which normally permits opening of the door in one direction, thus acting as a stop against opening of said door in the opposite direction. The stop member is free floating and is spring biased, such that it can be retracted manually to permit opening of the door in the opposite direction. The biasing of the free floating stop member is effected by use of a leaf spring which localizes the applied force limiting same generally to the forward portions of the stop member. As such, upon manual depression, the rearward portion of the free floating stop member moves inwardly easily until a segment thereof bottoms, with the forward portion of said stop member then being rocked forward to retract the stop member entirely.

Abstract: A pin latch structure primarily intended for aircraft and arranged to be flush mounted. The latch includes a reciprocable latch pin arranged to be received in a conventional latch socket. The latch pin is retracted or extended by a handle and trigger assembly.Connected to the latch pin is an overcenter biasing means urging the latch pin into its latch socket and the handle and trigger assembly toward its closed condition when the biasing means is in one direction past center; and urging the latch pin to its retracted position and the handle and trigger assembly to its open position when the biasing means is past center in the opposite direction.

Abstract: A catch comprising a plunger member and a guide member, the plunger member being able to reciprocate in the guide member, with a nose of the plunger member extending out of the guide member, each of the members being a single moulding of a plastics material, one or both members including one or more tongues which extend primarily in the direction of relative reciprocation of the members and are resiliently flexible transversely to that direction, each tongue engaging a cam or a tongue on the other member in such a manner that forces act on the tongues having components parallel to the direction of relative reciprocation of the members, in the sense which urges the members towards a limit of relative reciprocation at which the extension of the nose out of the guide member is greatest, and if the nose is displaced into the guide member and released, then the plunger member returns to the said limit.