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 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: A curved panic guard for use with external vertical rod exit devices has no sharp, angled or flat projecting surfaces to interfere with the passage of a wheelchair.

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 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: Safety-drum antipanic lock comprising a bolt (3, 103), an actuating rod pivotingly connected to the door, at each of its ends, by means of a unit formed by a housing (1, 101) fixed onto said door and a lever (2, 102) pivotingly mounted, in said housing (1, 101), at least one lever (2, 102) being an actuating lever cooperating with components of its housing (1, 101) to actuate the bolt (3, 103). The housing (1, 101) of the actuating lever (2, 102) is associated with at least a safety-drum (19, 20; 120) driving a bit (21, 23; 151) co-operating with actuating means for said housing to actuate the bolt (3, 103). Said housing (1, 101) of the actuating lever (2, 102) comprises at least two different operating means (14, 15a, 15b; 114) capable of separately co-operating each with a drum (19, 20; 120) to actuate said bolt (3, 103).

Abstract: A mounting pad for a lock cylinder provides a plurality of bosses which protrude interior of a door stile, the bosses having inclined threaded bores which hold set screws, the set screws are accessed laterally through an access opening on the side wall of the stile, the set screws are progressed outwardly of the bosses to press against an inside wall of the stile, thus clamping the mounting pad to the door stile. The mounting pad holds a lock cylinder inside an annular lock collar by use of a lock ring. The lock cylinder communicates to mechanical means residing interior of the door stile to effectuate latching of the door with a key. The access opening for insertion of a tool such as an Allan wrench to progress the set screws is located on an interior side wall of the door stile such that when the door is completely assembled, the access opening is covered either by an interior door panel, or other door structures such as a panic exit device or panic bar.

Abstract: A lock mechanism for an emergency exit door or the like is constructed with a tongue pivotable between two positions--an extended position and a retracted position, the former for use when the door is closed and locked, and the latter when the door is open--and a pawl arranged for releasably retaining the tongue in either or both of the two positions, the tongue being releasable from the pawl by depressing a breakable seal or by a cylinder key. The mechanism has the advantage of being readily releasable from the inside yet capable of being sealed against unauthorized use.

Abstract: A door latching or unlatching push bar apparatus comprising: a mounting rail means to be carried by the door, the rail means having a locking rail; a push bar mounted for advancement and retraction relative to the rail means; support means carried by the push bar to extend toward the rail means, and a lock arm carried by the support means to be movable into and out of dogging position relative to the locking rail; and an actuator carried by the push bar and operatively connected with the lock arm to move the lock arm into and out of dogging position when the push bar has been advanced toward the rail means.

Abstract: A combined panic exit and combination lock assembly for a security area door including a panic exit device on the door inner side and a high security combination lock on the door outer side, wherein operation of a panic bar from within the security area concurrently retracts both the latch system of the panic exit device and the lock bolt of the combination lock for egress from the security area. However, retraction of the panic exit latch system and of the lock bolt from outside the door requires independent unlocking operation of both the panic exit device and combination lock. A primary latch bolt of the exit device is retracted by a rod member and main control link, and secondary outputs and associated secondary latch bolts are connected to bellcranks.

Abstract: An electrically operated exit device comprises a low powered dogging assembly for a pushbar and an electrical actuator for a latch bolt. A latching bracket is attached to the pushbar for movement inwardly and outwardly along a path. A dogging plate of the dogging element is pivotally moveable between a retracted position out of the path of the latching element and an extended position in the path of the latching element. The dogging plate is spring biased toward the extended position and has a protruding shoulder. When the dogging plate is extended and the pushbar moved inward manually, the latching bracket strikes the dogging plate, retracts it slightly against the force of the spring bias and then continues slightly beyond the shoulder of the dogging plate. Then, the dogging plate again extends fully under the influence of the spring bias such that a bearing surface on the far side of the shoulder catches the latching bracket and thereby dogs the pushbar.

Abstract: A heavy-duty panic proof lock unit comprising a latch bolt mechanism, a dead bolt mechanism, and a cartridge mechanism. The latch bolt mechanism cooperates with a primary spindle. The dead bolt mechanism cooperates with a secondary cylinder. The cartridge mechanism comprises a first cartridge plate, a second cartridge plate, a rocker lever, a collar, an H-shaped slide, a rotary lever, and a spring-loaded catch. The collar is a ring-shaped plate having approximately a same size with the opening of the drive ring of the rocker lever and comprises two outwardly projecting teeth at opposite locations respectively to cooperate with notches of the rocker lever. The collar also has an inwardly projecting tooth designed to fit in slide along the spindle slot and to transmit rotary force between the primary spindle and the rocker lever. The collar is entrapped in the opening of the drive ring, with the two outwardly projecting teeth thereof retained within the notches of the rocker lever.

Abstract: In the system, exits are provided with opening bars and locks. The system has a central post and control boxes. Each control box is associated with an exit and is connected to the central post. Activation of an opening bar initiates the sending of information to the central post by the associated control box. This triggers a first delay To. During this delay, the opening of the exit can be stopped for a further delay Tc. The opening is allowed at the end of the first delay or at the end of the second delay. A third delay Tp can be triggered during the second delay Tc to allow the opening of the exit under question during the third delay Tp and to relock the exit under question at the end of the third delay Tp, by cancelling the effect of the second delay Tc. The system can also operate in the anti-intrusion mode. In particular, it can be used in stores or public establishments of medium area.

Abstract: An electrically operated exit device comprises a low powered dogging assembly for a pushbar and an electrical actuator for a latch bolt. A latching bracket is attached to the pushbar for movement inwardly and outwardly along a path. A dogging plate of the dogging element is pivotally moveable between a retracted position out of the path of the latching element and an extended position in the path of the latching element. The dogging plate is spring biased toward the extended position and has a protruding shoulder. When the dogging plate is extended and the pushbar moved inward manually, the latching bracket strikes the dogging plate, retracts it slightly against the force of the spring bias and then continues slightly beyond the shoulder of the dogging plate. Then, the doggin plate again extends fully under the influence of the spring bias such that a bearing surface on the far side of the shoulder catches the latching bracket and thereby dogs the pushbar.

Abstract: A door push-bar lock-out retainer which includes a block for mounting onto a door and it has a flexible strap for surrounding the push-bar and holding it in the door unlatched position. The strap is adjustable to accommodate various sizes of push-bars. The block has an opening which receives one end of the strap which has a latch end which is trapped in the opening by a latch member on the block. A key is utilized for releasing the strap from the latched position to thereby release the push-bar and thereby place the door in its locked position.

Abstract: Improvements in a panic bar door operator assembly include a self-contained alarm unit, and a remote unlatching mechanism. The alarm unit comprises a separate key-switch assembly and a separate alarm assembly which separably mount on the housing of the panic bar assembly in a cooperative relationship with the panic bar operator. The key-switch assembly is selectively operable to armed and disarmed settings and also to an access setting. In the access setting, the alarm switch of the alarm assembly is in its disarmed position and an alarm cannot be given, and in this position an adjacent cover member can be removed to provide access to the interior of the alarm assembly, particularly for battery replacement where self-contained batteries power the alarm. In the disarmed setting, the key-switch assembly latches the cover member on the housing so that it cannot be removed and in this setting an alarm will not be given when the panic bar is operated.

Abstract: Door lock and lock assemblies are useful, for example, in vehicle cabs. Latch and lock assemblies of known structures which can be unlocked from inside the cab while remaining locked from outside the cab require complex and bulky linkage assemblies. The subject door latch and lock assembly includes pivotal outer and inner actuator. The pivotal movement of the outer actuator simultaneously pivots the inner actuator to open a catch mechanism. Pivot movement of the inner actuator can be independent of the outer actuator. A locking lever can be pivoted to a locked position to prevent pivotal movement of the outer actuator. Pivotal movement of the inner actuator is not prevented by the locking lever. Thus, the disclosed door latch and lock assembly can be opened from inside the cab while remaining locked from outside the cab without requiring complex and bulky linkage assemblies.

Abstract: A crash bar door locking device is provided, suited for mounting on the inside of a swinging door. The crash bar is mounted horizontally across the door providing ready access by movement in the outside direction. The crash bar activates a pivotal lever which causes a latch bolt to rotate inwardly and disengage from a door strike. The pivotal lever provides a deadbolt feature by preventing the rotation of the latch bolt. A release is incorporated in the latch bolt and allows the latch bolt to rotate when the release engages the door strike as the door closes. An additional unlocking mechanism may be provided for retracting the latch bolt from the outside of the door independently of the crossbar. A firelocking mechanism may be incorporated in the latch bolt to secure the latch bolt when a fire occurs. Two pins with a spring between them are retained by fusible plugs at either end of a bore in the latch bolt, so that the latch bolt operates as a normal lock on the door.

Abstract: A building has at least one security guard post to control the secured building exits, each of which has an unlocking instrumentality, without forbidding their emergency use. When activating the unlocking instrument to open a secured exit, there is a transmission of information to the security guard post and an initiation of a delay during which the security guard can forbid the opening of the exit. The unlocking instrument can also visually indicate events at the exit. The apparatus has an electro-mechanical lock, a sensor which is sensitive to motion of the unlocking instrument, a control line linking each door to be controlled to the security guard post, and a central electronic processing unit. A surveillance circuit responds to the sensor. A security circuit frees the unlocking instrument when a fault is detected.

Abstract: An exit device for a door includes a rear channel member, a latch bolt assembly at one end of the channel member, a pair of spaced rails mounted in the rear channel member, with the channel member including two sets of opposed longitudinally extending grooves in its interior forming tracks for the rails. The rails are mounted in the tracks. A path bar includes a portion extending outwardly of the channel member. At least one connecting link is pivotably attached at one end to the rails and pivotably attached at the other end to the push bar for mounting the push bar in the channel for movement between a retracted position and a depressed position. The push bar has tapered end portions tapering outwardly toward the latch bolt assembly. The exit device further includes a cover including an end portion adjacent the push bar and having a taper complementary to the taper on the adjacent end of the push bar.

Abstract: A door latch mechanism has a pivoted latch disposed between a retaining solenoid and a four-bar toggle linkage. The toggle linkage connects the operating stem of the solenoid to the latch, has an under-the-center arrangement in a direction away from the solenoid in the latched position of the mechanism, and provides a substantial mechanical advantage to amplify the holding force of the solenoid. When the solenoid is de-energized and pressure is applied to open the door, the latch pivots and the toggle linkage collapses to release the keeper bar. The keeper bar is trapped but has a limited movement in both horizontal and vertical directions in a plane substantially parallel to the pivot axis of the latch. The overall arrangement is relatively simple, compact, inexpensive, easy to install, and reliable in its operation.

Abstract: The system automatically warns when opening of an exit door is attempted, causing an alarm to be made and preventing full opening for a predetermined period of time. Such a system includes an electromagnet, timer, alarm and activator switch connected in series with a power source such as house current and disposed in and around the frame with no electrical connection to or from the door. A magnetically attractable plate or prong is secured to the door adjacent to the electromagnet. The switch may include a spring biased plunger on the frame, held in the closed circuit position against the spring bias with the door closed. The switch automatically moves to the closed circuit position when the door begins to open, causing an alarm to be immediately sounded and the plate to continue to be strongly held by the electromagnet, thereby preventing full opening of the door. The system permits the full opening of the exit door only after a suitable period of time has elapsed.

Abstract: A handle device for a door which is formed of an assembly installed in a door panel and has a handle grip connected thereto by a pivot pin. A latch is retractably mounted to the assembly and is interlocked with the handle grip. An actuating lever is pushed by the handle grip to move the latch. A reset lever drives the actuating lever when pushed by a push rod extending inside the door. A lock mounted on the assembly has a cam secured to a rotor, serves to release the engagement between a lock plate which is secured to the assembly and adapted to check the slide of the latch, and the latch. When the push rod turns the reset lever, engagement between the lock plate and the latch is released and the latch slides and is retracted by turning the actuating lever.

Abstract: A refrigerator door pull and latch assembly in which the locking mechanism is disposed in the handle. The locking mechanism connected to a strike bolt assembly, which assembly has secured to one end thereof a safety release member. The door handle thus includes the locking mechanism and the locking mechanism can be disengaged from inside the refrigerator by operating the safety release lever.

Abstract: A door opening-closing apparatus for large-sized refrigerators, the apparatus having a grip seat secured to a door, and a grip, acutating lever, and latch pivotally attached to the grip seat, a push rod penetrating the door, and a latch support. The outer end of the push rod is brought into contact with one end of the actuating lever, and one end of the latch is contacted with the other end of the actuating lever. The actuating lever is pivoted by pushing against the inner end of the push rod to undo the engagement between the latch support and the other end of the latch. The push rod is disposed inclined with respect to the door, so as to be more remote from the side pillar as the push rod extends from the outer end to the inner end thereof. By this arrangement, the push rod can be advantageously disposed closer to the side pillar without any fear of collision between the push rod inner and the side pillar.

Abstract: An aircraft door latching bolt actuating mechanism in which inside and outside handles are provided to selectively actuate a crank having connections with one or more door latching bolts. The outside handle is supported for movement between a normal, generally flush non-operative position and a non-flush operative position permitting movement of the crank to a bolt releasing position. In one form, the handle is pivoted between its ends for swinging movement between its flush and non-flush positions, and in another form is spring biased for pop-up movement from the flush to non-flush position. The outside handle is normally retained in its flush position by a latch or lock engaged with a releasable keeper which can be manually released from the door exterior to enable use of the outside handle. When utilizing the inside handle, a connected first cam operates to release the keeper to enable movement of the pop-up handle embodiment to its non-flush position.

Abstract: An exit device including a latch bolt and an action lever. The action lever includes a cam lever pivotably connected thereto and having a first portion engaging a locking member and a second portion engaging the latch bolt the cause the retraction thereof as the action lever is pivoted into its open position when a locking member is in an unlocked position. When the locking member is in the locked position, the first portion of the cam lever is free of engagement of the locking member and a second portion is free to cam about the latch bolt upon pivoting of the action lever into its open position whereby the latch bolt is not retracted.

Abstract: A door lock unlockable from the indoor side comprises a handle device and a lock device. The handle device includes an indoor handle and an outdoor handle for operating a latch means for a door panel to a stationary frame. The lock device is operated from the outdoor side so as to be brought into and out of engagement with said indoor handle thereby to lock said indoor handle and said outdoor handle against rotation. The indoor handle is pivotally supported so as to be able to be swung towards and away from said door panel and adapted to be disengaged from said lock device by a predetermined swinging toward or away from said door panel, the engaging structure between said indoor handle and said lock device being exposed on the inner surface of said door panel. The door lock permits an easy recognition and understanding of the way to manipulate the indoor unlocking mechanism, as well as a simple and easy manipulation, thereby to ensure a prompt escape from the chamber.

Abstract: Extending a dead bolt into a locked position turns a crank that releases a lock release plate from an unlocked position which in turn releases a slide. Upon its release, the slide responds to springs and forces a tooth into a notch of an actuator to lock a latch bolt. To unlock the latch bolt and the dead bolt, the dead bolt can be directly retracted, whereupon the crank engages the lock release plate to move it back to its unlocked position. The lock release plate during this travel picks up the slide and withdraws the tooth from the actuator, freeing the latch bolt assembly. When locked, the latch bolt and the dead bolt can be simultaneously unlocked by rotation of an inside operator which produces rotation of a double-lobed cam. One lobe of the cam moves the slide against the force of the springs sufficiently to clear the tooth from the actuator.

Abstract: A vehicle door lock (106) and latch (104) assembly is provided whereby a key may be used to lock the door (100) and to prevent rotation of the outside door handle (108). A lock handle (116) is provided inside the vehicle door (100) for overriding the key lock (110) to permit the inside and outside handles (114,108) to operate to open the door. Both the key lock (110) and the lock handle (116) when turned operate a linkage (172,168) which is connected to the locking cam (158) enabling the locking cam (158) to be moved between its locked and unlocked positions. Even with the lock handle (116) and the key lock (110) in the locked position, the inside handle (114) can be turned to move the locking cam (158) to the unlocked position and to open the door (100). The outside handle (108) can now be used to open the door also. The outside handle (108) can also be released for operation by turning the key in the key lock (110) to the unlocked position.

Abstract: An improved and simplified dead bolt rim lock, which provides "classroom function". A dead bolt is fixed on a draw plate slidable in a rim lock case and having a cross slot which extends one way from center and is engaged by a crank pin movable in an 180.degree. arc between front and rear centered positions. The crank pin is on a crank arm carried by a turnknob rotatable in the rim lock case, and its projecting end lies in the path of a cam mounted for rotation in the back plate of the case and connected for operation from a key-actuated cylinder mounted in the outside face of the door. For classroom function, the turnknob has a limited throw and has lost motion relative to the crank arm so as to allow retraction of the bolt by the turnknob but prevent its advancement thereby to locked position.

Abstract: A two-bolt lockset simultaneously locks and unlocks in response to a single action by an operator, such as a key and cylinder. A deadbolt couples to such an operator to project and lock or retract and unlock. A crank also responds to the locking of the deadbolt to move a slide that engages and locks an actuator of the second bolt, a latch bolt, to lock the latch bolt. The slide is biased away from the latch bolt so that upon retraction of the deadbolt and corresponding motion of the crank, the slide is freed of the crank and moves out of engagement with the actuator. Preferably, the slide is carried by a retractor so that both locks clear by the single turn of a single inside operator. The retractor responds to a retractor cam attached to the inside operator to translate. The slide moves out of engagement with the actuator upon such movement and forces the crank to withdraw the deadbolt.

Abstract: A panic exit latch and actuator mechanism includes an elongated latch bolt actuator element rectilinearly movable along its axis and disposed in an elongated horizontally extending housing traversing a door. A push plate is supported for movement outwardly and inwardly relative to the housing. A pair of bell cranks provide an operative connection between the push plate and the actuator element to move the actuator element from its latch projected position to its latch retracted position in response to inward movement of the push plate. The bell cranks are mounted for pivotal movement about their apices in the housing, one crank being mounted adjacent either end of the housing. The pivotal axes of the bell cranks extend generally transversely to the direction of motion of the latch bolt actuator element. Each bell crank includes an arm pivotally connected to the latch bolt actuator element and arm pivotally connected to the push plate.

Abstract: An interconnecting lock assembly having simultaneously actuated, multiple security deadbolts, the central one forming part of the main lock subassembly, and the others being operated from the main lock subassembly through special mechanism.

Abstract: An automobile deck or trunk lid having a key operated lock for releasing a lid latch is provided with a lost motion drive connection in a shaft between the lock and latch and the inner end of the shaft has a knob accessible from within the trunk compartment for releasing the latch without turning the key operated lock. The shaft is readily detachable and attachable to the lock and latch so that it may be installed as a replacement for a conventional one-piece shaft in existing automobiles.

Abstract: A surface mounted rim type lock set assembly for use on fire doors wherein a latch bolt is adapted for release by operation of a cross-bar on one side of the door and for release independently by manual operation of a lever-type handle on the other side, the assembly including a locking slide which is held out of engagement with the handle hub by heat responsive means adapted to release the slide when a portion of said means is melted. Normal locking and unlocking of the handle is effected by a key in a cylinder lock.

Abstract: A safety lock comprises a lock housing, a pivotal bolt, bolt control means located in the housing to rotate the bolt from a locking to an unlocking position, key actuated means to operate the bolt control means and handle means adapted to operate the bolt control means in a manner such that the pivotal bolt rotates approximately 90.degree. from a locking position to an unlocking position by turning the handle means which is restricted to a turning movement of less than 180.degree.. The pivotal bolt extends outwardly from the housing when it is in a locking position. The key actuated means operates independently of the handle means and preferably rotates through an angle of at least 360.degree..

Abstract: A lock assembly is mounted on a door for opening the same upon depression of a handle pivotally mounted thereon. A spiralled cam is formed on a tubular adapter, detachably mounted on a rotary spindle of a lock assembly to replace a door knob. The handle engages the cam for retracting a latch normally extended into a striker plate for holding the door in a locked position on a door jamb, upon pivoting of the handle.

Abstract: There is disclosed a security lock for emergency door latches which are typically provided with a crash bar pivotally carried on the door and extending transversely across its inner face. The security lock comprises a bracket arm which is pivotally mounted on the side brackets of the door latch mechanism and which carries, on its free end, a cover bar which overlies a substantial portion of the crash bar. The bracket arm is provided with locking means for restraining its pivotal movement whereby the bracket arm and its dependent cover bar can be restrained in a raised or lowered position, thereby preventing actuation of the crash bar, or locking the crash bar in its latch disengaging position.

Abstract: A panic exit actuator and locking mechanism adapted particularly for mounting on a narrow stile door frame with the actuator spanning substantially the full door width and extending between the inner and outer narrow stile frame members, and wherein the lock mechanism is mounted in the outer narrow stile frame member and has a latch bolt supported for movement between latched and unlatched positions, the latch bolt being releasably retained in the latched position by deadlock means and being movable to an unlatched position in response to pressure applied in a door opening direction to a push bar that is movably supported on one or more linkage assemblies having an operating connection with actuating means operable to initially release the deadlock and thereafter move the latch bolt to the unlatched position.

Abstract: The present invention is an electric security lock which not only provides an alarm signal to an alarm device, but which also has a push bar emergency release. The electric security lock includes a dead bolt, a frame adapted to slideably receive the dead bolt, a cover plate coupled to the frame for holding the dead bolt in place, a pair of cams coupled to the dead bolt and adapted to move the dead bolt in a lateral direction, a locking cylinder coupled to each of the cams, and an electric activating apparatus coupled to the dead bolt. The electric activating apparatus includes a circular latch member pivotally mounted and spring coupled to the dead bolt, a metal bar with a first end and a second end having a square hole disposed midway between the first and second holes, the first end of the metal bar is adapted to be coupled and uncoupled mechanically to the circular latch member, and a micro electronic switch mechanically coupled to the square hole of the bar and electrically coupled to an alarm device.

Abstract: A latch bolt mechanism of the push-pull type which includes a stop lever maintained normally in an inactive position by means of a fusible pin, the lever being adapted to drop into a position where it blocks the movement of the latch-withdrawing mechanism when the pin melts at a predetermined temperature due to a fire condition.

Abstract: A lock system controls exiting and entering of personnel, particularly in public and commercial structures by means of an alarm and a panic bar and key system to operate a lock through a series of interlocking controls including an internal panic bar, an internal key lock, an external key lock and a supplemental manual control. Four modes of operation are provided in which the panic bar is at all times operative and the alarm is selectively operative to provide, in addition to panic bar actuation or in combination therewith, authorized passage, authorized exit only, free passage in both directions and free exit only.

Abstract: A push door-latch opener suitable for hospital rooms including a door mounting plate, a horizontal pivoting rod attached to the plate, a vertical pivoting rod attached to said plate and located above the horizontal rod, a horizontal bell crank pivoted about said vertical rod and having a first arm projecting into the plane of the door and a second arm being substantially parallel to the plane of the door, a torsion spring for biasing said bell crank in a direction so that the second arm is biased in the direction of the first arm, and a downwardly-directed push handle pivoted about said horizontal rod and being biased to a first out position and being adapted to be pushed to a second in position, the push handle having above the horizontal rod an upwardly-directed projection which engages the inner surface of the second arm of the bell crank so that when the push handle is pushed, the projection turns the second arm away from the door and simultaneously turns the first arm, thereby operating a latching mechan

Abstract: A safety release for unlocking the trunk lid of an automobile from within the trunk compartment. The release is an integral part of the lid locking mechanism and includes a clutch assembly for disconnecting the latch shaft from the key tumblers and a hand operated linkage for actuating the clutch and rotating the disconnected shaft to move the latch components from the normally locked to the unlocked position.

Abstract: An emergency exit lock of vertical rod type has an active case which contains a latch bolt retracting mechanism operable at all times by a panic-bar. A key-controlled cassette mechanism releasably retained in the active case cooperates with the latch bolt retracting mechanism to provide an additional lock operating function. The cassette mechanism may be assembled to provide a latch holdback function, to lock or disable and unlock or enable a manually operated outside operating member, or to unlock or enable an outside operating member normally maintained in locked or disabled condition when the key is removed.