Abstract: A method of providing and installing a door latching structure for operatively interconnecting an upper latching structure carried by a door and a lower actuator structure carried by the door, the upper latching structure located outside the door, and comprising providing a longitudinally elongated link sized for reception within the door and to extend into proximity to the latching structure, and to the actuator structure, the link operatively connected to the actuator structure; and providing a laterally extending link attached to an upper end portion of the longitudinally elongated link, the laterally extending link connectible to the latching structure to transfer longitudinal movement of the longitudinal link effected by the actuator structure to the latching structure, for operating same.

Abstract: An electromagnetic door lock which uses an electromagnet in addition to a latch to maintain the door in the locked position. The lock has hinged handles that unlock the latch when they pivot. When the latch moves to an unlocked position it operates a reed switch which turns off the electromagnet. The latch can also be unlocked by a remotely controlled solenoid. Key operated locks allow only persons with a key to be able to move the pivoting handles.

Abstract: A latch mechanism comprising pushing means (28) which may operate vertically. The pushing means (28) being operable to push a first lever (42) which is positioned to act upon a second lever (50). The second lever (50) operates to turn a spindle (53). The turning the spindle effects retraction of a locking mechanism associated with the spindle. The latch mechanism may be used to operate deadlocks and security locks.

Abstract: An exit bar for securing a door has a housing adapted for mounting to a door. A push pad for receiving a push force is mounted to the housing. A latch extends from the housing to releasably latch the door to which the exit bar is mounted. A link system links the push pad to the latch so that a push force exerted on the push pad releases the latch. An electromagnetic lock disposed in the housing locks the link system to prevent releasing of the latch. The electromagnetic lock employs an electromagnet and a movable armature to lock the link system. The exit bar further delays unlocking the link system for a preestablished delay time after the push pad has been pushed.

Abstract: A fire retardant door having a vertical latch stile extending the length of the stile for receiving the elements of a concealed vertical rod exit device therein along with an expanding, fire resistant material, preferably an intumescent compound, for sealing the opening when subjected to heat. The vertically reciprocating exit device rods disposed in the opening are operably connected to bolts disposed in the end of the stile openings, the bolts moveable in response to movement of the vertically reciprocating element from a retracted position within the door edge opening to an extended position to engage the door frame. The composition of the door and arrangement of the exit device elements is selected for a high fire rating, and preferably includes a wooden outer layer provided on each of the major faces of the door.

Abstract: In a door closure assembly, the combination comprising a latch bolt element; carrier structure to carry the bolt element to pivot between door unlatched and latched position; and means carried by a fire resistant portion of the assembly to be responsive to an increase in temperature to a level T to move into position to block door unlatching movement of the bolt element from door latching position.

Abstract: A pressure relief latch for latching a first panel to a second panel and for release under pressure, including a housing for mounting on the first panel, a spring loaded detent carried in the housing, and a bolt having a pivot axis and pivotally mounted on the housing for latching engagement with the second panel, with the detent including a free roller and a compression spring positioned along a central spring axis perpendicular to the pivot axis, and with the bolt having a curved exterior shape with a detent notch for receiving the roller. The housing is closed about the spring except for a threaded opening at one end and a roller opening at the other end, and a threaded plug is positioned in the threaded end for loading adjustment. The roller may be spherical or cylindrical.

Abstract: A push pad releasable exit device with continuous deadlocking for mounting near a door edge for engaging a lock strike includes a housing having first and second sidewalls upon which are mounted two end walls and an internal wall parallel to the end walls, each of the end walls and the internal wall having a hole, the holes being aligned on a common axis, the first sidewall having a wedge stop projecting inwardly therefrom toward the axis of the holes in the end walls and the internal wall; a tapered latch bolt mounted on a cylindrical shaft, the shaft extending through the holes and having a provision for urging the latch bolt toward the lock strike; a wedge plate having a hole providing clearance around the shaft and aligned with the holes in the end walls, having a tab pivotally resting in a slot of the second wall, and having a corner distal from the tab resting against the wedge stop when the door is in an open position; a provision for sensing when the door is in a closed position and for flipping the w

Abstract: A door lock system including a control mechanism transversely mounted in a door in the middle, a transmission mechanism mounted in one hollow stile at one lateral side of the door and coupled to one end of the control mechanism at right angles, a top latch assembly and a bottom latch assembly respectively fastened to the hollow stile at difference elevations and driven by the control mechanism through the transmission mechanism to secure to the door to a doorframe, the top latch assembly including a shell fixed to the hollow stile on the inside, a frame mounted inside the shell, a latch bolt pivoted to the shell, a push member pivoted to the frame and driven to move the latch bolt, an adjustment device driven by the transmission mechanism to move the push member, and a locating device mounted in the frame and controlled by a fine adjustment device to secure the actuating device to the frame.

Abstract: A door latching structure for operatively interconnecting an upper latching structure carried by a door and a lower actuator structure carried by the door, the upper latching structure located outside the door, and comprising a longitudinally elongated link sized for reception within the door and to extend into proximity to the latching structure, and to the actuator structure, the link operatively connected to the actuator structure; and a laterally extending link attached to an upper end portion of the longitudinally elongated link, the laterally extending link connectible to the latching structure to transfer longitudinal movement of the longitudinal link effected by the actuator structure to the latching structure, for operating same.

Abstract: A push pad releasable exit device with continuous deadlocking for mounting near a door edge for engaging a lock strike includes a housing having first and second sidewalls upon which are mounted two end walls and an internal wall parallel to the end walls, each of the end walls and the internal wall having a hole, the holes being aligned on a common axis, the first sidewall having a wedge stop projecting inwardly therefrom toward the axis of the holes in the end walls and the internal wall; a tapered latch bolt mounted on a cylindrical shaft, the shaft extending through the holes and having a provision for urging the latch bolt toward the lock strike; a wedge plate having a hole providing clearance around the shaft and aligned with the holes in the end walls, having a tab pivotally resting in a slot of the second wall, and having a corner distal from the tab resting against the wedge stop when the door is in an open position; a provision for sensing when the door is in a closed position and for flipping the w

Abstract: An electromagnetic shear lock comprising an electromagnet assembly which is mounted to a door frame and an armature assembly which is mounted to a door, the electromagnet assembly and armature assembly defining a gap. The armature assembly includes an armature mounted on a leaf spring. The electromagnet assembly includes an electromagnet which is mounted to a mounting plate. A pair of springs which engage opposite end portions of the mounting plate bias the mounting plate and electromagnet away from the armature. When the electromagnet is energized and the electromagnet and armature are attracted to each other, the mounting plate slides longitudinally along the guide member against the force of the springs and the electromagnet is displaced to close the gap.

Abstract: An electronic lock mechanism includes a solenoid driven actuator and a cam actuator ring. The cam ring interfaces with both the latch of a door lock and the door lock key cylinder. With this interfacing, the door latch can be independently operated by one of the key cylinder, the cam actuator ring or a door lock push bar or paddle. With this independent operation, the ability to open a door can be maintained during power or lock mechanism failures for purpose of egress from the area secured by the door lock.

Abstract: A door security device which includes a support bar having first and second ends, at least one blocking means disposed between the ends of the support bar, attaching means mounted to the support bar for removably securing the support bar in position adjacent a structure, and an actuator connected to the attaching means and operable to actuate the attaching means to secure the support bar adjacent the structure. The use of one blocking means allows the device to be used to secure two doors which close against a common mullion. The use of two blocking means allows the device to be used to secure two doors which close against each other. The door security device can also be used to secure windows and single doors.

Abstract: A door with a "panic" release handle including a conductive release segment mounted directly onto a frameless glass panel with non-conductive spacers to isolate a sensor circuit adapted to release a lock communicating with the circuit.

Abstract: A push pad releasable exit device with continuous deadlocking for mounting near a door edge for engaging a lock strike includes a housing having first and second sidewalls upon which are mounted two end walls and an internal wall parallel to the end walls, each of the end walls and the internal wall having a hole, the holes being aligned on a common axis, the first sidewall having a wedge stop projecting inwardly therefrom toward the axis of the holes in the end walls and the internal wall; a tapered latch bolt mounted on a cylindrical shaft, the shaft extending through the holes and having a provision for urging the latch bolt toward the lock strike; a wedge plate having a hole providing clearance around the shaft and aligned with the holes in the end walls, having a tab pivotally resting in a slot of the second wall, and having a corner distal from the tab resting against the wedge stop when the door is in an open position; a provision for sensing when the door is in a closed position and for flipping the w

Abstract: This exit device has a press bar and an elongated deadbolt adapted to be mounted horizontally adjacent the free end of the door and a pivoted retractor blade inward of the door. The blade is pivoted by the press bar and engages with its nose a projecting surface on the deadbolt and retracts the deadbolt. The blade also has a keeper contact surface which, as the door closes, is contacted by the keeper and the blade is pivoted inward to retract the deadbolt. The retractor blade also serves as an anti-friction bearing having a peripheral portion which rolls against the deadbolt and counters against the inward force on the deadbolt opposing to the opening force on the door.

Abstract: A combination lock/deadbolt is connected to a push-to-open panic-bar device to operate in response to push-bar operation, thereby withdrawing both the push-bar latchbolt and the deadbolt permitting instantaneous and unrestricted egress from a secured area. To maintain the security of the area from unauthorized entry from outside the secured area, a connection between the push-to-open device and the combination lock/deadbolt assembly is implemented with a lost motion connection. The lost motion device, preferably is a flexible cable transmitting force only in tension, assures that any operation of the combination lock/deadbolt will not effect the security provided by the push-to-open device. Further, the push-to-open device may be provided both with a conventional key cylinder lock and a knob, ever, or thumb lever release on the door exterior.

Abstract: A door locking and unlocking safety mechanism comprising a push mechanism actuator structure to be carried by the door; a single rod operatively connected with the push mechanism to be displaced by operation of the push mechanism; door latch mechanism operable to latch and unlatch the door in response to movement of the single rod; and temperature response blocking structure associated with the latch mechanism to block operation of the latch to unlatch the door, in response to a predetermined increase in ambient temperature.

Abstract: A door handle assembly has an emergency-unlocking function, so that even in a condition in which a latch bar 2 of the assembly is locked on a front side of a door 4, it is possible for a user to unlock the assembly from a rear side of the door 4 within fail. A socket member 8 is pivoted to a socket-member casing 6 through a vertical pivot 9, the casing 6 being fixedly mounted on a stationary frame element 7. In the rear side of the casing 6, a manually-operated pedal 12 is pivoted to a pedal casing 11 through a first horizontal pivot 13, the pedal casing 11 being fixedly mounted on the frame element 7. A base-end portion of a holding rod 14 is pivoted to one end portion of the pedal 12 through a second horizontal pivot 15 to have a front-end surface of the rod 14 abutted on a stop portion 19 of the socket member 8, the stop portion 19 being disposed behind the pivot 9. The rod 14 is urged forward by a spring 20 contacting the pedal 12.

Abstract: A gearing is described for locks of panic doors. The gearing has a first gearing part (17)which is rotatable around a first axis (17a) and can be connected with an actuating member (18) for a lock nut or the like, and a second gearing part (28) which is rotatable around a second axis perpendicular to the first axis and is connected with a handle (1). One of the gear parts is provided with a driver pin (24) arranged parallel to and at a distance from the first axis and the other gearing part is provided with a guide part cooperating with the latter for the purpose of converting the rotating movement of the handle (1) into a rotating movement of the actuating member (18).

Abstract: A door structure includes a main door having an opening defined therein. A first and second auxiliary doors are hingedly fitted in the opening. A first and second latches are movably mounted on one end portion of the first and second auxiliary doors and are detachably engaged in a first and second notches defined in the main door. A first and second transmission mechanisms are respectively mounted in the first and second auxiliary doors for controlling the first and second latches to be detachably engaged in the first and second notches. A first and second driving members are respectively mounted in the first and second auxiliary doors for driving the first and second transmission mechanisms. A linking rod is connected between the first and second driving members such that the first and second driving members are able to operate synchronously so as to detach the first and second latches from the first and second notches synchronously via the first and second transmission mechanisms respectively.

Abstract: A testing apparatus which has a test chamber located within a chamber frame. The apparatus includes a computer controlled ergonomic system which can vary the temperature of the test chamber. Within the test chamber is an adjustable ceiling that can be moved to vary the volume of the chamber. Extending around the outer edge of the ceiling is an inflatable seal which seals the chamber when the ceiling is moved to a new position. The ceiling and walls have a plurality of adjustable vents that direct fluid flow into the chamber. The doors of the apparatus are each constructed from an inner wall that is coupled to an outer wall by a plurality of floating joints. The floating joints allow the inner wall to contract or expand relative to the outer wall without creating a corresponding stress on the outer wall or the joints.

Abstract: A ratcheting latch mechanism for holding the vertical rods of a door exit device in the retracted position includes a chassis and a latch rod, with a plurality of ratchet notches formed therein, slidingly held by the chassis for motion between an extended and a retracted position. One end of the latch rod engages a socket in the door frame, the other is connected to a vertical rod extending from the exit device. A pawl is mounted on a release mechanism and engages the ratchet notches whenever the door is open to prevent the latch rod from moving back towards the extended position and damaging flooring or ceiling material.

Abstract: Disclosed is a door lock for locking a double-swinging type fire protection door. The door lock has a safety device controlled by a melting heat sensitive element to lock the spring bolt of the lock bolt in the locked position when the ambient temperature is sharply increased due to a fire.

Abstract: Apparatus for actuating a safety device comprises an acoustic sensor and apparatus coupled to the sensor for actuating the safety device in response to sound of a predetermined character. Apparatus for releasing or closing a closure is also disclosed. Three embodiments of the apparatus are disclosed.

Abstract: An exit bar has an elongated body for mounting on an exit door. The exit bar incorporates a pair of independent sensors. An infrared beam is generated along the front of the bar. An infrared detector produces a first signal when the beam is interrupted. The first signal results in release of a lock securing the door. If the beam is interrupted for longer than a pre-set time limit, a first alarm sounds. A capacitance sensor produces a second signal when the sensor detects changes of capacitance in the bar as a result of contact or near contact with foreign objects. The second signal also results in release of the lock securing the door. If the capacitance sensor detects a capacitance change for longer than a pre-set time limit, a second alarm sounds.

Abstract: A door hold open device is disclosed for maintaining a door swingably mounted on a door jamb in an open position. The door hold open device includes an elongate track housing mounted on the door jamb, and a shaft disposed within the track housing. The shaft extends along a horizontal axis and is mounted for free rotation about the axis. A slider block having a threaded bore threadably engages a threaded portion of the shaft. The slider block is capable of moving linearly along the horizontal axis and causes the axial rotational movement of the shaft as it moves linearly from side-to-side. An arm link is pivotally connected at one of its ends to the slider block and pivotally connected at its other end to the door. The arrangement is such that upon manually opening and closing the door, the arm link moves the slider block linearly from side-to-side thereby causing the axial rotational movement of the shaft.

Abstract: A device (10) for preventing the opening of a door (52) into an enclosed space (50) if the atmosphere in the space is hazardous. A sensor or sensors (31) monitor the atmosphere in the space and provide a controller (32) with a signal proportional to atmospheric conditions. If the controller determines that a hazardous condition exists, it produces a signal that actuates a lock that prevents the door from being opened. In a preferred embodiment, the device prevents the opening of a door of a transport container if the proportion of oxygen in the atmosphere of the interior of the container is less than a predetermined value.

Abstract: A door security device includes an elongate support bar, attachment mechanism mounted to the support bar, opposing blocking members attached to opposing ends of the support bar, and an actuation mechanism. In one embodiment, the attachment mechanism includes a pair of generally J-shaped hooks which engage a portion of a door. The blocking members include a surface thereon which rests flush against the door frame. The actuation mechanism includes a handle assembly which is pivotally connected to the hooks. The handle assembly includes a camming surface thereon which contacts the support bar. The security device is actuated by positioning the hooks about the door and positioning the blocking members flush against the door frame. The handle is then pivoted, causing the camming surface to pivot about the support bar and pull the hooks away from the door and towards the support bar.

Abstract: A locking device, suitable for walk-in freezer doors, automatically locks when the door is closed, allows the door to be pulled open from the outside only when a proper key is inserted and rotated 90.degree., and always allows the door to be opened from the inside by pushing on a manual actuator. The locking device includes a strike mounted on the door frame, an outside plate assembly including a rigid handle and lock cylinder, and an inside plate assembly including a bracket supporting a spring loaded bolt, an enabling mechanism in the form of a collapsible linkage coupled to the bolt, a manual actuator, and a cover.

Abstract: A door locking system for attachment to an outwardly opening door which engages the door frame and which has a panic bar movable towards the door for disengaging the locking system. The locking device includes an outer sleeve fixedly mounted to the interior surface of the door and extending over one side of the door frame. An inner sleeve is provided within the outer sleeve which is pulled outwardly to a door frame engagement position, wherein the inner sleeve extends over the other side of the door frame to prevent the door from being opened. Movement of the panic bar towards the door causes the inner sleeve to retract into the outer sleeve, thereby allowing the door to be opened. A reset system is provided for automatically resetting the lock when the door is closed.

Abstract: A positive latch system for sliding doors having a break away feature, which includes a door which is capable of sliding along a track between open and closed positions; means for allowing the sliding door to breakaway from its linear track, and swing fully open for greater access to the opening; latching mechanism positioned on the door, for allowing the door to positively latch closed either from the sliding configuration are the breakaway configuration, the mechanism including a latch bolt depressible upon engaging the latch plate, from at least two directions, each direction the latch bolt depressing for engaging into the latch plate port, and means on the latch plate for allowing the latch bolt to depress when engaging from either of the two directions.

Abstract: A latch assembly for a fire door having a pushpad for emergency exit is described. The pushpad is connected to a rod to transfer motion of the pushpad to the latch assembly. The latch assembly includes a platform attached to the fire door, a linkage assembly attached between the rod and a latch bolt, and a deadlock arm assembly attached to the platform. The deadlock arm assembly is movable between a first position to block movement of the linkage assembly and a second position to allow movement of the linkage assembly. A fire fuse assembly is also attached to the linkage assembly to move the deadlock arm assembly out of its first position blocking movement of the linkage assembly at normal room temperature.

Abstract: A security system for use on doors which have an electrically operated door locking mechanism is disclosed, which security system is operative to provide a preset egress time delay following an effort to exit through the controlled door before actuating the door locking mechanism to unlock the door and allow egress. During the egress time delay, the system provides a visual input of the time remaining until the door locking mechanism will unlock the door to allow egress or access therethrough. In the preferred embodiment, a speech synthesizer and digital display is also utilized to inform the individual demanding egress or access of the delay, and to provide other information as desired.

Abstract: A link, used to allow retraction of the latchbolt against the bias of a spring, is formed of a fusible material to insure that, in the presence of intense heat, the link will melt and will no longer override a deadlocking pawl to allow the latchbolt to be withdrawn.

Abstract: A mechanism for dogging a door latch assembly of a panic exit device having a retractible door latch biased to move outward from the door latch assembly, with inward movement of the door latch being activated by a push bar, includes a mechanism for holding a key cylinder positioned adjacent to the door latch assembly. A catch mechanism linked to the door latch is configured to move as the door latch is retracted, and a arm is pivotably mounted adjacent to the key cylinder holding mechanism. The arm is configured to retain the catch mechanism, with the door latch being prevented from outwardly moving with respect to the door latch assembly.

Abstract: An improved multipoint lock assembly is provided for securing a swinging door in a tightly closed condition. The multipoint lock assembly includes a main actuator cartridge for retracting a plurality of latch pins mounted at vertically spaced positions along a free side edge of the swinging door, in response to rotational movement of indoor and outdoor lever handles. A trigger assembly retains the latch pins in a retracted position in response to lever handle rotation to open the door, and includes a trigger pin for engaging the adjacent door jamb upon door closure to release the latch pins for spring-loaded movement to an advanced position. The advanced latch pins engage ramped strike plates on the door jamb to draw in and tightly retain the closed door against the door jamb. When the latch pins are advanced, a security deadbolt on the main actuator cartridge can be thrown to positively lock the door.

Abstract: A pneumatically controlled exit device assembly for remote latching and unlatching of a door by controlling air pressure directed to the exit device from a pneumatic pressure source is described. The device includes a push bar operated exit device for retracting a latch of the emergency door, with the exit device having an air cylinder assembly biased to control retraction of the latch in response to changes in applied air pressure. In addition, a pneumatic transfer assembly is provided in fluid connection between the pneumatic pressure source and the air cylinder assembly, with the pneumatic transfer assembly having an air line and a mechanism for protecting the airline positioned between the door frame and the door.

Abstract: A door security device includes an elongate support bar, attachment mechanism mounted to the support bar, opposing blocking members attached to opposing ends of the support bar, and an actuation mechanism. The attachment mechanism includes a pair of generally J-shaped hooks which engage a portion of a door. The blocking members include a surface thereon which rests flush against the door frame. The actuation mechanism includes a handle assembly which is pivotally connected to the hooks. The handle assembly includes a camming surface thereon which contacts the support bar. The security device is actuated by positioning the hooks about the door and positioning the blocking members flush against the door frame. The handle is then pivoted, causing the camming surface to pivot about the support bar and pull the hooks away from the door and towards the support bar.

Abstract: A door latch control apparatus for use on a panic exit door allowing the door to be unlatched either manually or electrically is disclosed. Manual latch retraction is accomplished by pushing inwardly a push bar. Electrical latch retraction is accomplished by energizing a solenoid. A unique linkage system is provided to allow for the independent operation of the manual and electrical latch retraction. The apparatus also provides for the door to be dogged, i.e., securing the latch in the unlatched position, either manually or electrically. Manual dogging may be accomplished with the use of a fail safe dogging mechanism. Electrical dogging is accomplished by leaving the solenoid energized and thus the latch retracted.

Abstract: A latch assembly for use with a panic exit device, particularly a top latch having a U-shape which engages a stem portion of a T-shaped receiving lug mounted overhead to a top member of the door frame. The U-shaped top latch is pivotably mounted to the active stile of the door. The latch assembly causes the U-shaped latch to pivot upward to capture the stationary T-shaped receiving lug, or pivot downwardly to disengage from the T-shaped receiving lug. The latch member is in sliding and abutting engagement with two latch plates which slide in one direction to retain the latch member in a downward orientation to hold the latch in an open position, and slide in an opposite direction to allow the latch member to pivot upwardly upon engaging pressure by the strike. A wedge is caused to slide into blocking engagement with the latch when it is in the closed position.

Abstract: A door locking system for attachment to an outwardly opening door which engages the door frame and which has a panic bar movable towards the door for disengaging the locking system. The locking device includes an outer sleeve fixedly mounted to the interior surface of the door and extending over one side of the door frame. An inner sleeve is provided within the outer sleeve which is pulled against a spring to a door frame engagement position, wherein inner sleeve extends over the other side of the door frame to prevent the door from being opened. A catch on the panic bar retains the inner sleeve in the engagement position, and movement of the panic bar towards the door causes the inner sleeve to retract into the outer sleeve, thereby allowing the door to be opened.

Abstract: A lock for fire-escape door provided with an actuating member having an integrally formed tongue to block the retraction of a main latch from a protruded position provides higher security to the lock. The lock includes: a housing; a pivotable main latch and a pivotable auxiliary latch which are urged by springs to protrude outside of the housing; and an actuating member adapted to keep the main latch protruded out of the housing and operable with a push plate to release the main latch from being kept protruded. The auxiliary latch has a side projection which stops the actuating member at a first position where the auxiliary latch is protruded and the tongue is so disposed to be accommodated by an inner recess of the main latch such that the main latch is free to retract from the protruded position; the same side projection also stops the actuating member at a second position where the auxiliary latch is retracted and the main latch is protruded.

Abstract: A panic exit device has an improved linkage between the push bar and the push bar housing so that no significant horizontal or sideways movement of the push bar occurs as it is pushed inward to unlatch the door. Each linkage employs a link having one linear and one curved slot to smoothly guide the push bar whenever the push bar is pressed inwardly. The device further features a fail-safe dogging mechanism so that the push bar cannot be unintentionally dogged. A fail-safe clip is moved out of an interfering position with the dogging element only when the push bar is moved to unlatch the door.

Abstract: A concealed exit device for mounting vertically within a door to cooperate with a threshold latch plate and an overhead latch plate in a door opening for latching and unlatching the door within the door opening. The concealed exit device includes a manually actuated member for mounting in a central portion of the door for manual movement from one side of the door between a normally biased position and an actuated position, upper and lower latching mechanisms for mounting in upper and lower ends of the door for movement between extended latched positions in cooperating latched relation with the overhead and threshold latch plates respectively and retracted unlatched positions out of cooperating relation with the latch plates.

Abstract: An alarm lock for securely locking both edges of an emergency exit door. A rigid, hollow housing mounts upon an existing door between opposing door facings. A pair of rigid, elongated rods is longitudinally displaceable within the housing between a locked position and an unlocked position. The rods are driven by a coupler confined within the housing and coupled to a rotatable crank controlled by a paddle arm handle assembly. The crank is journaled for rotation about a rigid axle which projects through the housing interior. Movement of the handle rotates the crank, selectively extending and retracting the rods into and out of engagement with the door casings. A panel mounted on the paddle arm clearly displays instructions for emergency use. When the handle is activated, a rigid follower associated with one of the rods forcibly contacts an alarm switch to activate an audible transducer. The alarm may be manually disarmed and reset by manipulation of a key switch.

Abstract: A fire-retardant pivoted door assembly with fire activated latching members includes a metal door frame having jambs and a header in which a fire-retardant door is mounted by a hinge assembly with a lower temperature resistance that the door and frame. Fire actuated latch bolt assemblies in the door are spaced vertically along the hinge side of the door, and include a housing providing an elongated cavity opening at the edge of the door. A latch bolt is slidably seated in the cavity and is biased towards the opening of the cavity. A fusible closure extends across the opening of the cavity and retains the latch bolt against the biasing pressure, and the hinge jamb has a spaced recess formed therein to receive the latch bolt upon melting of the fusible closure.

Abstract: A panic bar mechanism for an exit door having a frame with a stile, upper and lower lock rods vertically sliding in the stile, and a panic bar carried on levers pivotally mounted on the door frame. The mechanism includes a plate mounted in the stile for rotation about a horizontal axis, upper and lower connectors each having a first end attached to the plate on opposing sides of the horizontal axis and each having a second end attached to the upper and lower lock rods, respectively, and a drive pin carried in the lower connector parallel to the horizontal axis, with one or more of the levers having an inner end directly engaging the drive pin for moving the drive pin upward and rotating the plate about the horizontal axis and moving the lock rods vertically. In the preferred embodiment, the mechanism is non-handed, with both levers capable of engaging the drive pin.

Abstract: A door latch opener having a reversible mounting plate, a handle reversibly mounted on the mounting plate, an actuator reversibly mounted on the mounting plate and a spring reversibly mounted between the mounting plate and the handle permitting reconfiguration of the door latch opener allowing its operation in a wide variety of orientations. The door latch opener can be used with the handle in an upward or downward position and by pulling or pushing on the handle. Two such door openers can be used on a door in a cooperating non-interfering arrangement in various combinations of configurations.