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 exit device for use with a door pivotally mounted along one edge for movement about an axis, the exit device comprising: a housing having a longitudinal axis, the housing adapted to be secured to the door surface; a latch bolt disposed at one end of the housing adjacent an edge of t

We claim: 1. An exit device for use with a door pivotally mounted along one edge for movement about an axis, the exit device comprising: a housing having a longitudinal axis, the 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 disposed in the housing for substantially rectilinear movement relative to the housing from a first position to a second position in a path along the longitudinal axis of the housing, the retractor element operatively connected between the actuator member and the latch bolt, the retractor element moving toward the second position of the retractor element and the latch bolt moving toward the retracted position in response to movement of the actuator member toward the second position of the actuator member, the retractor element including a first linkage operatively connected to the actuator member, a second linkage movable relative to the first linkage and 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; an electrically energizable locking mechanism mounted to the housing, the locking mechanism including a reciprocating plunger for movement transverse to the longitudinal axis of the housing between a projected locking position and a retracted non-locking position, the second linkage having an opening for receiving the plunger when the plunger is in the projected locking position, the locking mechanism operative to move the bolt to the projected locking position when energized; a time delay circuit connected to the locking mechanism for controlling electrical power supplied to the locking mechanism; and a switch 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 for a predetermined time interval after the actuator member is moved toward the second position, wherein, when the locking mechanism is energized, movement of the actuator member toward the second position of the actuator member moves the first linkage to the second position of the first linkage for loading the spring and starting the time interval, the time delay circuit interrupting electrical power to the locking mechanism upon expiration of the time interval allowing the plunger to move to the non-locking retracted position and the second linkage to move to the second position of the second linkage under force of the spring for moving the latch bolt to the retracted position. 2. An exit device as recited in claim 1, wherein the actuator member is a manually operated touch bar supported on the housing for movement from the first position spaced from the surface of the door to the second position closer to the door surface. 3. An exit device as recited in claim 1, wherein the locking mechanism comprises a solenoid. 4. The exit device of claim 1 further comprising: 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. 5. An exit device as recited in claim 4, wherein the sensor is selected from a photoelectric switch, a magnetic reed switch, or a Hall effect sensor. 6. An apparatus for use in the exit device of claim 1 for sensing when a door pivotally mounted along one edge to a door frame for movement about an axis is in a closed position, the door position sensing apparatus 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 latched in the closed position. 7. A door position sensing apparatus as recited in claim 6, wherein the sensor is selected from a photoelectric switch, a magnetic reed switch, or a Hall effect sensor. 8. An apparatus 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, an electrically energizable locking mechanism mounted to the housing operative to prevent the latch bolt form moving to the retracted position when energized, 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 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, the apparatus for delaying egress comprising: 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, and a plunger disposed in the locking mechanism for relative reciprocal movement transverse to the direction of movement of the retractor element between a projected locking position and a retracted non-locking position, the retractor element having an opening for receiving the plunger when the plunger is in the projected locking position to prevent movement of the retractor element, whereby, when the locking mechanism is energized, movement of the actuator member toward the second position of the actuator member moves the first linkage to the second position of the first linkage loading the spring and starting the time interval, the time delay circuit interrupting electrical power to the locking mechanism upon expiration of the time interval allowing the plunger to move to the non-locking retracted position and the second linkage to move to the second position of the second linkage under force of the spring for moving the latch bolt to the retracted position. 9. In combination, a door frame; a door hinged along one edge to the door frame; an exit device comprising a housing having a longitudinal axis, the housing 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 disposed in the housing for substantially rectilinear movement relative to the housing from a first position to a second position in a path along the longitudinal axis of the housing, the retractor element operatively connected between the actuator member and the latch bolt, the retractor element moving toward the second position of the retractor element and the latch bolt moving toward the retracted position in response to movement of the actuator member toward the second position of the actuator member, the retractor element including a first linkage operatively connected to the actuator member, a second linkage movable relative to the first linkage and 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, an electrically energizable locking mechanism mounted to the housing, the locking mechanism including a reciprocating plunger for movement transverse to the longitudinal axis of the housing between a projected locking position and a retracted non-locking position, the second linkage having an opening for receiving the plunger when the plunger is in the projected locking position, the locking mechanism operative to move the bolt to the projected locking position when energized, a time delay circuit connected to the locking mechanism for controlling electrical power supplied to the locking mechanism, and a switch 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 for a predetermined time interval after the actuator member is moved toward the second position, wherein, when the locking mechanism is energized, movement of the actuator member toward the second position of the actuator member moves the first linkage to the second position of the first linkage for loading the spring and starting the time interval, the time delay circuit interrupting electrical power to the locking mechanism upon expiration of the time interval allowing the plunger to move to the non-locking retracted position and the second linkage to move to the second position of the second linkage under force of the spring for moving the latch bolt to the retracted position. 10. The combination of claim 9, the exit device further 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 in the closed position. 11. The combination as recited in claim 10, wherein the sensor is selected from a photoelectric switch, a magnetic reed switch, or a Hall effect sensor. 12. The combination of claim 9, the exit device further comprising a sensing 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. 13. A door position sensing apparatus as recited in claim 12, wherein the sensor is selected from a photoelectric switch, a magnetic reed switch, or a Hall effect sensor. 14. The combination of claim 9 wherein the actuator member is a manually operated touch bar supported on the housing for movement form the first position spaced from the surface of the door to the second position closer to the door surface. 15. The combination of claim 9 wherein the locking mechanism comprises a solenoid.