초록 ▼

A touch bar (24) exit device (20) comprises a retractor element (50) disposed in the housing (22) for substantially restilinear movement. The retractor element (50) connects the touch bar (24) and the latch bolt (82) such that the retractor element (50) and the latch bolt (82) are moved toward the r

A touch bar (24) exit device (20) comprises a retractor element (50) disposed in the housing (22) for substantially restilinear movement. The retractor element (50) connects the touch bar (24) and the latch bolt (82) such that the retractor element (50) and the latch bolt (82) are moved toward the retracted position in response to movement of the touch bar (24). An electrically energizable locking mechanism (104) in the exit device (20) includes a reciprocating plunger (106) moving transverse to the retractor element (50). When energized, the locking mechanism (104) is operative to move the plunger (106) to the projected locking position to prevent retraction of the latch bolt. A time delay circuit is connected to the locking mechanism (104). A switch (120) actuated in response to movement of the touch bar (24) is connected to the time delay circuit for starting a predetermined time interval for temporarily delaying deenergization of the locking mechanism (104). When the time delay circuit interrupts power to the locking mechanism (104), the plunger (106) moves allowing the latch bolt (82) to move to the retracted position.

대표청구항 ▼

We claim: 1. An apparatus for use with an exit device for delaying egress through a door pivotally mounted along one edge for movement about an axis, the exit device including a housing adapted to be secured to the door surface, a latch bolt disposed at one end of the housing adjacent an edge of th

We claim: 1. An apparatus for use with an exit device for delaying egress through a door pivotally mounted along one edge for movement about an axis, the exit device including a housing adapted to be secured to the door surface, a latch bolt disposed at one end of the housing adjacent an edge of the door and movable relative to the housing between a projected position extending outwardly of the housing for latching the door in a closed position and a retracted position where the latch bolt is inside the housing for allowing the door to be opened, an actuator member mounted on the housing for movement relative to the housing from a first position to a second position, a retractor element comprising a first linkage adapted to be operatively connected to the actuator member, a second linkage movable relative to the first linkage and adapted to be operatively connected to the latch bolt, a connector slidably connecting the first and second linkages, and a spring positioned between and engaging the first and second linkages for biasing the linkages in opposite directions such that movement of the actuator member toward the second position of the actuator member moves the first linkage and second linkage together with the latch bolt to the retracted position of the latch bolt by loading the spring, the apparatus for delaying egress comprising: an electrically energizable locking mechanism adapted to be mounted to the housing, the locking mechanism including a plunger for relative reciprocal movement transverse to the direction of movement of the retractor element between a projected locking position when the locking mechanism is energized, and a retracted non-locking position when the locking mechanism is denergized, the plunger adapted to be received into an opening on the retractor element when the plunger is in the projected locking position to prevent the latch bolt from moving to the retracted position; a time delay circuit connected between the locking mechanism and a power source for controlling electrical power supplied to the locking mechanism; and a switch adapted to be actuated in response to movement of the actuator member toward the second position, the switch connected to the time delay circuit for starting a time interval upon actuation of the switch for temporarily delaying deenergization of the locking mechanism after the actuator member is moved toward the second position or to maintain the locking mechanism energized and the plunger engaged to the retractor if a predetermined time interval of the time delay circuit is not achieved, wherein the movement of the plunger, the retractor and the actuator are not all co-planar. 2. The apparatus for use with an exit device of claim 1, the exit device further comprising: a sensed element adapted to be mounted to the door frame; and a sensor disposed in the housing adjacent to the latch bolt for sensing the sensed element when the door is in the closed position. 3. The apparatus as recited in claim 2, wherein the sensor is selected from a photoelectric switch, a magnetic reed switch, or a Hall effect sensor. 4. An apparatus for use with an exit device of claim 1, the exit device for sensing when a door is in a closed position, the door position sensing apparatus comprising: a sensed element mounted to the door frame; and a sensor disposed in the housing adjacent to the latch bolt for sensing the sensed element when the door is latched in the closed position. 5. A door position sensing apparatus as recited in claim 4, wherein the sensor is selected from a photoelectric switch, a magnetic reed switch, or a Hall effect sensor. 6. A securing system as recited in claim 4, wherein the sensor is selected from a photoelectric switch, a magnetic reed switch, or a Hall effect sensor. 7. A securing system for a door hinged along one edge to a door frame and secured in a closed condition by a latch along at least one other edge to the door frame and wherein the latch is operated by an associated exit device to unlatch the door to allow the door to move to an open position, the exit device mounted on the door including an actuator member for movement relative to the door from a first position to a second position, a retractor adapted to be operatively connected between the actuator member and the latch for rectilinear movement from a first position to a second position in response to movement of the actuator member, the movement of the retractor being transverse to the movement of the actuator member, the door securing system comprising: an electrically energizable locking mechanism adapted to be mounted in the exit device, the locking mechanism including a reciprocating plunger for movement transverse to the direction of movement of the retractor between a projected position and a retracted position, the plunger adapted to engage the retractor for preventing operation of the exit device when the plunger is in the projected position for securing the door in the closed condition, the locking mechanism operative to move the plunger to the projected position when energized; and a time delay circuit connected to the locking mechanism for controlling electrical power supplied to the locking mechanism, the time delay circuit including a switch for producing a signal indicating an attempt to open the door, a timer connected to the switch for receiving the signal produced by the switch and starting a predetermined time interval for temporarily delaying deenergization of the locking mechanism for the predetermined time interval after the actuator member is moved toward the second position or to maintain the locking mechanism energized and the plunger engaged to the retractor if the predetermined interval of the time delay circuit is not achieved, wherein the time delay circuit interrupts electrical power to the locking mechanism upon expiration of the time interval allowing the exit device to operate to unlatch the door, and wherein the movement of the retractor, actuator and plunger are not all coplanar. 8. A door securing system as recited in claim 7, further comprising means for indicating that an attempt has been made to open the door. 9. A door securing system as recited in claim 8, wherein the attempted door opening indicating means comprises sounding an alarm. 10. A door securing system as recited in claim 8, wherein the means for signaling when an attempt has been made to open the door is activated directly by the switch. 11. A door securing system as recited in claim 8, wherein the attempted door opening indicating means is located remotely from door. 12. A door securing system as recited in claim 7, further comprising means for indicating the occurrence of an emergency condition, the emergency indicating means being connected between the locking mechanism and the power supply for interrupting power to the locking mechanism allowing the exit device to operate to unlatch the door. 13. The securing system of claim 7, wherein the exit device further comprises: a sensed element adapted to be mounted to the door frame; and a sensor disposed in the housing adjacent to the latch bolt for sensing the sensed element when the door is in the closed position. 14. The securing system as recited in claim 13, wherein the sensor is selected from a photoelectric switch, a magnetic reed switch, or a Hall effect sensor. 15. The securing system of claim 7, the exit device for sensing when a door is in a closed position, the door position sensing apparatus comprising: a sensed element mounted to the door frame; and a sensor disposed in the housing adjacent to the latch bolt for sensing the sensed element when the door is latched in the closed position. 16. A method for delaying egress through a door pivotally mounted along one edge for movement about an axis, comprising: providing an exit device including a housing adapted to be secured to the door surface, a latch bolt disposed at one end of the housing adjacent an edge of the door and movable relative to the housing between a projected position extending outwardly of the housing for latching the door in a closed position and a retracted position where the latch bolt is inside the housing for allowing the door to be opened, an actuator mounted on the housing for movement from a first position to a second position relative to the housing, and a retractor connected between the actuator and the latch bolt for rectilinear movement from a first position to a second position in response to movement of the actuator toward the second position of the actuator, the movement of the retractor being transverse to the movement of the actuator; providing an electrically energizable locking mechanism mounted to the housing operative to prevent the latch bolt from moving to the retracted position when energized; providing a time delay circuit connected between the locking mechanism and a power source for controlling electrical power supplied to the locking mechanism; energizing the locking mechanism for causing a plunger associated with the locking mechanism to move into engagement with the retractor to prevent movement of the retractor when the locking mechanism is energized, the plunger movement being transverse to the direction of movement of the retractor; activating the time delay circuit in response to movement of the actuator toward the second position for starting a time interval for temporarily delaying deenergization of the locking mechanism; de-energizing the locking mechanism at the end of a predetermined time interval of the time delay circuit causing the plunger to move out of engagement with the retractor for movement of the retractor toward the second position and the latch bolt to the retracted position; and maintaining the locking mechanism energized and the plunger engaged to the retractor if the predetermined interval of the time delay circuit is not achieved, wherein the plunger and the actuator are not all coplanar.