Abstract: The assembly has an auxiliary bolt which is pivotably mounted in a housing. The bolt is captively journalled by a removable bracket which has a pair of recesses on opposite sides thereof. A shaft integral with the bolt sets in one pair of the recesses, to effect one handed operation of the assembly, and with optional setting of the shaft in the other pair of recesses, the assembly is oppositely handed. The assembly is simply bolted to a faceplate; consequently, by removing such bolts, and removing the bracket, the bolt can be replaced or reversed in its handed disposition. An override spring is provided to protect the assembly from damage, in the event that the associated flushbolt fails to enter the strike or recess provided therefor; the spring allows the auxiliary bolt to fully retract, even through the flushbolt translation is inadequate.

Abstract: A time-delayed mechanism obstructs movement of a latchbolt from its latched position to an unlatched position. Linkage coupled to the latchbolt, and manually acutated (by a push pad, or the like), includes an arm which normally pivots, with the manual actuation of the linkage. An initial, limited movement of the linkage activates a switch, and the latter activates a time delay circuit component. The latter component, following a specified time delay, interrupts power to a solenoid. The solenoid, normally powered, has a bar inductively movable therein with a rod joined thereto for coincident movement. An end of the rod carries a roller which intrudes into the pivotal arc of the arm, preventing full pivotable movement thereof. Consequently, the linkage, which is to move the latchbolt to its unlatched position is blocked until the time delay has run its course, whereupon the solenoid is de-energized.

Abstract: The mechanism is configured to operate both a primary latch bolt and secondary latches, and provides for immediate, ready egress for the side of a door to which the mechanism is mounted, but offers high security for the other, outside of the door. The latch bolt is directly controlled by a first linkage, and the secondary latches are directly controlled by a second linkage. During egress, both linkages translate together, via a pin connection. However, a lost motion arrangement prevents retraction of either the bolt, or the secondary latches, if the other is compromised (or operated by a key or combination). From the outside, high security side of the door, the latch bolt and the secondary latches must be retracted together.

Abstract: The universal assembly comprises components and parts interchangeable between, for being common to, a top latch and a bottom latch in vertical-rod exit devices. Simply by adding a few discrete parts to the assembly, the same becomes, selectively, a top latch or a bottom latch, The top latch, and the bottom latch, comprise the universal assembly to which the respective, discrete parts have been added. The assembly, and the latches have a rotatable input member with must be rotated to enable retraction of a latch bolt, and a limb operative to block retraction of a latch bolt if the input member is not rotated.

Abstract: The coordinator has a pair of spaced-apart limbs pivotably mounted to a housing; one of the limbs functions to hold a door open, whereas the other limb is disclosed for impingement by another door and, as a consequence thereof, causes activation of the door coordinator, i.e., triggers a proper, sequential closing of the two doors, in which the inactive door proceeds to close, while the active door is held open. A carriage slidably mounted to the housing has a lobe which intrudes into the pivotable arc of one of the limbs to prevent that limb from allowing its door to close before the door, held open by the other limb, has closed. A blocking arm keeps the carriage in its lobe-intrusive position, and has a linkage with the other limb. Accordingly, as the other limb permits the closure of its door, the linkage moves the blocking arm to allow the second door to close.

Abstract: The assembly comprises two, snap-together pieces which, following their clinched or latched engagement, are freely rotatable relative to each other. One of the two pieces comprises a sleeve which has an inner annular land, and the other of the two pieces comprises a rod having flexible extending fingers which terminate in outwardly-directed, land-engaging and latching lugs. The rod is slid into the sleeve, with the lug-ended fingers entering first, and, consequently, the fingers are resiliently forced inwardly until the lugs reach the land. Then the fingers spring outwardly while the lugs latch onto the land. This latching together of the pieces requires no tools.

Abstract: Central to the invention is a universal, center case sub-assembly from which, by adding components thereto, one may fabricate a rim style center case assembly, or a concealed-vertical style center case assembly, or a surface-vertical style center case assembly, or a combination rim and vertical style center case assembly, for a panic-type exit device. Besides minimizing the number of diverse components and parts required for the fabrication of the aforesaid center case assembly styles, the universal sub-assembly comprises an improved design which offers a marked mechanical/leverage advantage to the trim linkage.

Abstract: The pinion is of two-piece construction, the two pieces being identical and nestably mated to define a recess, therebetween, which is interrupted by abutments, and which confines an abutment-engaging pin. Each piece has a plurality of teeth projecting therefrom, and the pieces are so mated that the teeth pluralities project form opposite sides of the formed pinion. A generally U-shaped rack, having teeth formed on the confronting surfaces of the parallel limbs thereof, is in mesh with the pinion, and the pin penetrates an input shaft upon which the pinion is mounted. As the shaft is turned in one direction, the pin drivingly engages the abutments of only one pinion piece, to cause the teeth of the latter to drive the rack in one, given direction. Too, if the shaft is turned in the opposite direction, the pin engages the abutments of only the other pinion piece, to cause its teeth to drive the rack in the same, one, given direction.

Abstract: The invention comprises a lever handle having a handle-shaft receiving cam which is used to displace a slider to effect the retraction of a latchbolt. A yoke is positioned between the cam and slider to accommodate, adjustably, for handle droop. The yoke has a tapped hole and receives a machine screw which also penetrates an arcuate slot in the slider. Displacement of the yoke relative to the slot, corrects the handle droop by causing the cam to be slightly tilted. Accordingly, the handle shaft in the cam is correspondingly rotated about its axis, and the handle is brought into alignment with the horizontal.

Abstract: The presence of persons in a space is sensed with the aid of ultrasonic pulses which are sent out into the space when echoes of such ultrasonic pulses are received. Echoes attributable to the floor or to parts of a door in the space are timed out, and a remainder of such echoes is employed for sensing persons in the space. For example, sliding or revolving doors may be controlled and operated with the aid of such ultrasonic echoes, and limited access to secured areas may be provided thereby.

Abstract: The invention comprises the essential operating mechanism for a vertical latching assembly for a closure. It provides adjustment screws, accessibly disposed, externally of the closure (door), for adjusting the effective lengths of the elongate, latch bolt-actuating elements. A centercase, which is mounted externally of the door, has attachment blocks slidably coupled thereto. The blocks carry limbs, of the top and bottom bolt-actuating elements, or rod connectors, and the adjustment screws are threadedly engaged with the limbs for moving them, selectively and adjustably, axially of the centercase.

Abstract: The dogging device comprises a detented dogging hook, for engaging a latching and unlatching control rod of a panic exit latch and actuator assembly, or a like assembly, and comprises means for selectively changing the operator-implements thereof from one type to another. The method comprises the steps of forming such a changeable dogging device. The kit sets forth the components parts cooperative with a basic dogging device for adapting the latter for use with any one of a plurality of operator-implements.

Abstract: The invention comprises a latching and unlatching device for use on a door, or bulkhead, or the like, which device has a blocking plate for internally obstructing the latch to prevent its retraction, thereby to prevent the opening of the door. The blocking plate is internally secured in place, in an intermediate slidable position, where it does not obstruct the latch, by a low melting point cover. In the presence of excessive heat, as on the occurence of fire, the cover melts; this allows the blocking plate to slide to another, operative position in which it prevents the retraction of the latch and, consequently, the unlatching of the device. The method comprises the steps to be undertaken to modify an off-the-shelf latching and unlatching device to insure that it will be held securely latched in the presence of fire or excessive heat, and the kit sets forth the structure elements required for the aforesaid modification of off-the-shelf, latching and unlatching devices.

Abstract: The device comprises a latching assembly enclosed within, and translatable relative to, a centercase housing; the housing is mounted on a chassis. The device is adapted for cooperative engagement with a locking cylinder, for actuating the latching assembly, and for operation of a thumbpiece lift, by an ancillary, external, trim linkage, for translating the latching assembly. The latching device has a master, locking cylinder cam or dowel, the latter having a removable screw, which (through a locking cylinder) either operates a night-latch cam plate, to translate the latching assembly or, upon removal of the screw, allows the cam or dowel to translate a tumbler which, in turn, frees a thumbpiece lift, for operation (then) of the latching assembly by the lift, instead of by the cam plate. Accordingly, with the drive screw in place, the external, operating trim linkage can not operate the device; it must be unlatched, externally, by a key in the locking cylinder.

Abstract: In the preferred embodiment depicted, the invention comprises a limb, having a depending lug, fixed to a door. The lug makes a close clearance, near engagement with a socket-retainer fixed to a door-interfacing mullion. The upper end of the mullion is foreshortened, and addressed to a free space; it is slidably engaged with an internal socket. Accordingly, in the event of fire, the mullion may freely extend vertically, due to the heat. Such free extension causes the socket-retainer, and the depending lug, mutually to engage. By this arrangement, the door is secured closed, on the exposure to severe heat, even if the normal latching and/or locking device therefor comes loose or disengaged. The method comprehends fixing the mullion at one end, securing it against angular movement, exposing the other end to a free space, and mounting to the closure and mullion locking components which come into engagement only in response to thermal extension of the mullion.

Abstract: An apparatus for operating a door-latching and -unlatching device includes a thumbturn, a barrel cam, a shaft for coupling the thumbturn to the barrel cam to cause rotation of the barrel cam in response to movement of the thumbturn, a follower for the barrel cam and apparatus attaching the follower to the latch bolt to cause the latch bolt to move in response to actuation of the barrel cam. The illustrative barrel cam includes two generally diametrically opposed cam lobes such that rotation of the thumbturn either clockwise or counter-clockwise retracts the latch bolt. The follower includes a bar which lies against the cam surface of the barrel cam, and the latch bolt moving apparatus includes an actuator arm which is pivotally mounted adjacent one of its ends, the follower pin being mounted intermediate the actuator arm ends, the follower pin being supported adjacent the barrel cam, and the actuator arm further including a roller retractor actuator adjacent its other end.