초록 ▼

In combination with a door hinged at one edge within a door jamb with a latch assembly mounted upon a closing edge and a strike on the jamb in registry with the latch assembly which comprises a latch within a housing pivotally mounted upon the door upon a first axis and projecting from the housing a

In combination with a door hinged at one edge within a door jamb with a latch assembly mounted upon a closing edge and a strike on the jamb in registry with the latch assembly which comprises a latch within a housing pivotally mounted upon the door upon a first axis and projecting from the housing and having a lock position receiving the strike and normally biased towards an unlocked position, the strike on closing the door rotating the latch to its locking position, there being a locking aperture upon the latch. A yoke, normally biased towards a locking position and rotatable to an unlocked position is pivotally mounted upon the housing upon a second axis and mounts a latch pin adapted for interlocking registry with the lock aperture when the latch is in locking position. A spring biased reciprocal latch bar has an actuator which is adapted on retraction to retract the yoke to an unlocked position, the latch being free to move to its unlocked position on opening of the door relative to the strike. A manually operated control is mounted upon the housing and connected to the latch bar for retracting it.

대표청구항 ▼

1. In the combination with a door hinged at one edge within a door jamb with a latch assembly mounted upon a closing edge and strike on said jamb registerable with said latch assembly, said latch assembly comprising a housing secured to said door; a latch intermediate its ends pivotally mounted u

1. In the combination with a door hinged at one edge within a door jamb with a latch assembly mounted upon a closing edge and strike on said jamb registerable with said latch assembly, said latch assembly comprising a housing secured to said door; a latch intermediate its ends pivotally mounted upon said housing upon a first axis and at one end projecting from said housing and having an outwardly opening lock chamber, there being a lock aperture within the other end of said latch; said latch having a locking position registerable with and receiving said strike, and normally biased toward an unlocked position disengaged from said strike; said strike on closing said door engaging and rotating said latch to its locking position; a pivot member adjacent one end pivotally mounted upon said housing upon a second axis parallel to said first axis; means biasing said pivot member toward a locking position, said pivot member being retractable to an unlocked position; a lock pin upon said pivot member parallel to said second axis and adapted for interlocking retaining registry with said lock aperture when said latch is in its locking position; a spring biased reciprocal latch bar within and mounted upon said housing, adjacent one end having an actuator engageable with said pivot member; a movable means upon said housing connected to said latch bar for retracting said actuator for moving said pivot member to its unlocked position disengaging said latch; said latch being free to move to its unlocked position on opening the door relative to said strike. 2. In the door latch assembly of claim 1, said first and second axes and lock pin lying in vertical planes, said latch and pivot member being movable in horizontal planes. 3. In the door latch assembly of claim 1, a guard adjacent said latch intermediate its ends pivotally mounted upon said housing upon said first axis; biased to a first position blocking said latch lock aperture and adapted on engagement with said strike for movement relative to said latch to a locking position uncovering said lock aperture. 4. In a door latch assembly of claim 3, said latch having a longitudinal slot, one end extending to said lock aperture and at its other end extending into said lock chamber; said guard being nested within said slot and having a control arm extending into said lock chamber and engageable with said strike when the door is closed. 5. In the door latch assembly of claim 4, an angular detent on said control arm movably nested within said lock chamber in the path of relative movement of said door to said strike as the door is closed, said strike operatively engaging said detent rotating said guard to its locking position. 6. In the door latch assembly of claim 1, said lock chamber having an undercut area defining an elongated retaining lip on said latch; said strike including an elongated body depending into said undercut area and throughout its length retainingly engaging said lip. 7. In the door latch assembly of claim 1, the pivotal mounting of said latch including a first pivot pin mounted upon and spanning said housing upon said first axis. 8. In the door latch assembly of claim 7, said pivot member including a pair of parallel spaced yoke arms; the pivotal mounting of said pivot member including a second pivot pin mounted upon and spanning said housing upon said second axis; said yoke arms being pivotally mounted upon said second pivot pin; said lock pin spanning and secured to said yoke arms. 9. In the door latch assembly of claim 7, the pivotal mounting of said pivot member including a second pivot pin mounted upon and spanning said housing upon said second axis. 10. In the door latch assembly of claim 9, the biasing of said latch including a first coil spring mounted upon said first pivot pin at one end anchored to said housing and at its other end operatively engaging said latch. 11. In the door latch assembly of claim 3, the biasing of said latch including a first coil spring mounted upon said first pivot pin at one end anchored to said housing and at its other end operatively engaging said guard; said guard having a roll pin extending laterally thereof normally spaced from said latch; said roll pin on pivotal movement of said guard adapted to operatively engage said latch. 12. In the door latch assembly of claim 9, the biasing of said pivot member including a coil spring mounted upon said second pivot pin and at one end anchored to said housing and at its other end operatively engaging said pivot member. 13. In the door latch assembly of claim 8, a cross pin interconnecting the one ends of said yoke arms in the path of retracting movement of said actuator and operatively engaged thereby for rotating said pivot member to its unlocked position. 14. In the door latch assembly of claim 1, a stainless steel lock roller mounted upon said lock pin adapted for registry within said lock aperture. 15. In the door latch assembly of claim 6, said strike including an elongated strike plate secured to said jam opposing said latch assembly; said body extending from said strike plate centrally thereof including a boss spaced from said strike plate retaining said lip. 16. In the door latch assembly of claim 1, said housing having a longitudinal recess outwardly of and parallel to said door; said movable means including an elongated touch bar movably nested within said housing recess spaced from and parallel to said latch bar; a parallelogram linkage interposed between and pivotally connected to spaced portions of said touch bar and latch bar; and a pair of parallel longitudinally spaced drive rockers at their one ends pivotally mounted upon said housing and at their other ends pivotally connected to said parallelogram linkage, whereby manual inward pressure applied to said touch bar along its length effects an inward movement of said touch bar and a corresponding retraction of said latch bar. 17. In the door latch assembly of claim 16, said housing having a base plate mounted along and secured to the interior surface of said door; said latch bar being spaced from and slidably mounted upon said base plate. 18. In the door latch assembly of claim 17, the spacing of said latch bar from said base plate including nylon support rollers journaled upon said latch bar and engaging said base plate. 19. In the door latch assembly of claim 16, said parallelogram linkage including a pair of parallel drive yokes at their one ends pivotally connected to spaced under surface portions of said touch bar and at their other ends pivotally connected to said latch bar; said drive yokes being inclined downwardly at an acute angle extending toward the direction of retraction of said latch bar; said drive rockers at their said other ends being pivotally connected to said drive yokes intermediate their ends, but closer to said touch bar than to said latch bar. 20. In the door latch assembly of claim 19, the connection of said drive yokes to said touch bar including a pair of longitudinally spaced support channels on said touch bar extending into said housing; said drive yokes being pivotally connected respectively to said support channels. 21. In the door latch assembly of claim 1, the biasing of said latch bar including an elongated coil spring extending between said latch bar and housing and at its ends connected thereto. 22. In the door latch assembly of claim 1, said movable means including a solenoid mounted upon said housing and having a reciprocal plunger pivotally connected to said latch bar for retracting said latch bar on energization of said solenoid. 23. In the door latch assembly of claim 1, an alarm assembly within said housing having a power source, a key operated actuating switch and an alarm contact; an alarm actuating pin aligned with and spaced from said latch bar rearwardly thereof, guidably mounted upon said housing, normally spring biased to a position spaced from said alarm contact; unauthorized retraction on said latch bar engaging and retracting said actuating pin into registry with said alarm contact. 24. In combination with a door hinged at one edge within a door jamb with a latch assembly mounted upon a closing edge and a strike on said jamb registerable with said latch assembly, said latch assembly comprising a housing secured to said door; a latch intermediate its ends pivotally mounted upon said housing upon a first axis and at one end projecting from said housing and having an outwardly opening lock chamber, there being a lock aperture within the other end of said latch; said latch having a locking position registerable with and receiving said strike, and normally biased toward an unlocked position disengaged from said strike; said strike on closing said door engaging and rotating said latch to its locking position; a latch retaining means normally biased toward a locking position and retractable to an unlocking position, movably mounted upon said housing and adapted for interlocking retaining registry within said lock aperture when said latch is in its locking position; a reciprocal latch means within and mounted upon said housing, normally biased for movement in one direction, adjacent one end having an actuator engageable with said latch retaining means; and a movable means upon said housing connected to said latch means for moving the latch means in the opposite direction to its unlocked position disengaging said latch; said latch being free to move to its unlocked position on opening of the door relative to said strike; said latch retaining means including a pivot member adjacent one end pivotally mounted upon said housing upon a second axis parallel to said first axis; means biasing said pivot member toward a locking position, said pivot member being retractable to an unlocked position; and a lock pin upon said pivot member parallel to said second axis and adapted for interlocking retaining registry within said lock aperture when said latch is in its locking position. 25. In the latch assembly of claim 24, said pivot member being a yoke. 26. In the latch assembly of claim 1, said pivot member being a yoke. 27. In the door latch assembly of claim 1, an alarm assembly within said housing having a power source, a key operated actuating switch and an alarm contact; an alarm actuating means spaced from said latch bar and from said alarm contact; unauthorized retraction on said latch bar retracting said actuating means into registry with said alarm contact.