Patent Publication Number: US-2016247372-A1

Title: Security barrier system

Description:
CROSS-REFERENCE TO RELATED APPLICATIONS 
     This application is a continuation application of patent application Ser. No. 14/484,554, filed on Sep. 12, 2014, which claims the benefit of priority of provisional patent application Ser. No. 61/879,813, filed on Sep. 19, 2013, each entitled “Security Barrier System”. 
    
    
     BACKGROUND OF THE INVENTION 
     1. Field of the Invention 
     The present invention relates to a security barrier system which may be rapidly deployed to provide one or more barrier fences to control or prevent access or movement by one or more intruders into or within a protected or security area, and to a method of controlling a security area by deployment of such security barrier system. 
     2. Related Art 
     Barrier control systems are known in which a gate or barrier is deployed to control access or limit movement of persons within a security area. For example, see U.S. Patent Application Publication US 2009/0096572 A1 of Todd Bosik et al., published on Apr. 16, 2009, for “Breach Control Barrier System”. 
     SUMMARY OF THE INVENTION 
     Generally, the present invention provides a security barrier system comprised of a barrier fence operatively connected to a control system which may be operated to rapidly deploy the barrier fence from an undeployed, i.e., stowed, configuration to a deployed configuration in which the deployed barrier fence prevents or at least greatly inhibits movement of a person or persons through or into an area to be secured, i.e., a security area. 
     The barrier fence may be at least partly openable from either side thereof by authorized persons such as law enforcement or other security personnel, who have been provided with an access device, or by operation of the control system. Such personnel may at least partially open the barrier fence to provide a limited access opening at least large enough to permit access through the barrier fence by authorized personnel and/or permit the training of weapons upon persons not authorized to be in the security area. 
     In accordance with the present invention there is provided a security barrier system for closing a security area to passage therethrough by a person or persons, the barrier system comprising the following components. At least one deployable barrier fence and a control system operatively connected to the barrier fence to move the barrier fence between an undeployed position in which the security area is open to passage therethrough by a person or persons, and a fully deployed position in which the barrier fence closes the security area to any such passage therethrough. The barrier fence is configured to enable, at a selected time after the barrier fence is in the fully deployed position, the formation in the barrier fence of a limited access opening to the security area. 
     One aspect of the present invention provides for the control system and the barrier fence to be configured to provide the limited access opening by moving the barrier fence from its fully deployed position to an intermediate, partially deployed position between its fully deployed and undeployed positions, to thereby provide a limited access opening to the security area through the partially deployed barrier fence. 
     Another aspect of the present invention provides that the barrier fence is configured to open at least one section of the fully deployed barrier fence to provide at least one limited access opening to the security area through the fully deployed barrier fence. 
     Other aspects of the present invention may provide one or more of the following features, alone or in any suitable combination: the barrier fence may be comprised of a ballistic material along substantially its entire deployed length; at least a portion of the barrier fence may be sufficiently transparent to permit observation of the security area through the barrier fence; the barrier fence may comprise a pair of barrier fence sections which are movable in a horizontal travel path between the undeployed and fully deployed positions and the free ends of the barrier fence sections may abut or preferably overlap each other when in the fully deployed position; at least the overlapped free ends of the barrier fence may be transparent and may be comprised of a ballistic glass material; the barrier fence may be comprised of a ballistic material along substantially the entire deployed length; the barrier fence may be comprised of a series of hinged panels which are folded upon each other into a stack when the barrier fence is in its undeployed position, and which open into a linear array of panels as the barrier fence is moved into its deployed position; the security barrier system may further comprise a detection system which detects the presence of an unauthorized person or person in the security area and transmits an alarm to alert security personnel to activate the control system to move the barrier fence to its fully deployed position; in a related aspect of the present invention, the detection system alarm may automatically signal the control system to move the barrier fence to its fully deployed position; the barrier fence when in its undeployed position may be comprised of a roll of material which is unrolled into a linear configuration as the barrier fence is moved into its deployed position; and the security barrier system may further comprise one or more communication paths which automatically transmit signals to a remote emergency response facility when the control system is activated to move the barrier fence from its undeployed position to its fully deployed position. 
     In accordance with a method aspect of the present invention, there is provided a method of controlling a security area which has been entered by one or more unauthorized persons, the method comprising the following steps. One or more barrier fences of a security barrier system are deployed from an undeployed position in which the security area is open to passage therethrough, to a fully deployed position in which the one or more barrier fences close the security area to such passage. The barrier fences are positioned to fully enclose the security area and thereby enclose such unauthorized person or persons within the security area. 
     Other aspects of the method of the present invention provide for one or more of the following, in any suitable combination: operating at least one of the barrier fences to form, at a selected time after the barrier fences are in their fully deployed positions, a limited access opening in at least one of the barrier fences; when at least one of the barrier fences is transparent at least at a portion thereof, observing the one or more unauthorized persons through the transparent portion or portions; and when the barrier system further comprises an alarm system which detects the presence of one or more unauthorized persons in the security area, providing for the alarm system to automatically trigger a control system operatively connected to the barrier fences to move the barrier fences to their fully deployed position. 
     In accordance with one aspect of the invention, the security barrier system is comprised of a barrier fence which is moveable by one or more drive motors from a stowed to a deployed configuration. 
     In accordance with another aspect of the invention, the barrier fence is made of a ballistic material which is capable of stopping penetration by small arms fire, at least from small arms up to and including .223 caliber. 
     Still another aspect of the invention provides that at least a portion of the barrier fence is transparent in order that law enforcement or other security personnel may observe the area beyond the deployed barrier fence. 
     Yet another aspect of the invention provides for two sections of the barrier fence to be disposed opposite each other, for example, on opposite walls of a hallway or other area to be secured. Upon deployment, the two barrier fence sections are moved horizontally towards each other until their leading edges meet or preferably overlap. The overlapped portions may be, but need not be, at the center of the fully deployed barrier fence. 
     In one aspect of the invention, there is provided a transparent section of the deployed barrier fence, the transparent section being comprised of, for example, ballistic (bulletproof or bullet-resistant) glass and/or plastic. The transparent section may be provided at the overlapped portion of the deployed barrier fence. 
     Yet another aspect of the present invention provides for the barrier fence to be stowed above the area in which it is to be deployed, for example, adjacent to or within the ceiling of such area, and to be deployed downwardly in a vertical direction into contact or near contact with the floor. 
     Another aspect of the present invention provides that drive motors of the security barrier installation may comprise one or more electric, pneumatic or hydraulic drive motors connected to deploy the barrier fence or fences upon receipt of a deployment signal from the master control. The deployment signal may emanate from a control area through electrical conducting wires, or by any suitable wireless signals, or a combination thereof. The control system may also comprise a secondary control operatively connected to the barrier fence to permit at least partial un-deployment of the fence, i.e., return of the barrier fence towards or to its stowed, undeployed configuration. 
     Still another aspect of the present invention provides for a master control to remotely operate the drive motor or motors to deploy the barrier fence or fences, which master control may be set up in a secure master control area which may also provide for communication with a remote emergency response facility such as a police station or other security office which receives an alarm signal when the security barrier fence has been deployed, to signal that assistance is needed at the installation site. 
     Other aspects of the present invention will become clear from the appended drawings and the following description. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
         FIG. 1  is a perspective view of an undeployed security barrier installation in accordance with one embodiment of the present invention; 
         FIG. 2  is a view corresponding to that of  FIG. 1  with the conventional lockers omitted, and showing a partially deployed barrier fence of the installation of  FIG. 1 ; 
         FIG. 3  is a plan view of the installation of  FIG. 2 , with the barrier fence partially deployed and a part of the overhead track broken away; 
         FIG. 3A  is an elevation view taken along line A-A of  FIG. 3  with parts omitted and showing the barrier fence partially deployed; 
         FIG. 4  is a plan view corresponding to that of  FIG. 3  but showing the barrier fence fully deployed; 
         FIG. 4A  is an elevation view taken along line A-A of  FIG. 4  with parts omitted and showing the barrier fence fully deployed; 
         FIG. 5  is a schematic plan view showing intersecting corridors of a building, such as a school building, with four security barrier installations schematically shown respectively disposed near the ends of the intersecting corridors; 
         FIG. 6  is a schematic diagram showing two pairs of drive motors, each pair respectively associated with a security barrier member, for example, a security barrier member of the type illustrated in  FIGS. 1-5 , and a control area in which are located instruments to control the drive motors and to alert a police station that assistance is needed; 
         FIG. 7  is a partial plan view, enlarged relative to  FIG. 1 , of some of the panels of the barrier fence (not visible in  FIG. 1  and best seen in  FIG. 4A ) stored in their undeployed configuration; 
         FIG. 7A  is a partial view showing some of the panels of the embodiment of  FIG. 7  in their deployed configuration; 
         FIG. 7B  is enlarged relative to  FIG. 7A , and shows the portion of  FIG. 7A  enclosed by the circle B; 
         FIG. 8  is a plan view corresponding to that of  FIG. 7  showing an alternate embodiment of the panels of the barrier fence stored in their undeployed configuration; 
         FIG. 8A  is a partial view showing some of the panels of the embodiment of  FIG. 8  in their deployed configuration; 
         FIG. 9  is a plan view showing partial deployment of the barrier fence of the embodiment of  FIG. 8 ; 
         FIG. 10  is a plan view corresponding to that of  FIG. 9  but showing an embodiment of the invention wherein the barrier fence comprises a vertically oriented continuous roll of barrier material instead of discrete barrier panels; 
         FIG. 11  is a perspective view of a barrier installation in accordance with another embodiment of the invention in which storage recesses are formed in opposing walls of a hallway, in which recesses respective halves of an undeployed barrier fence are stored; 
         FIG. 12  is a schematic elevation view of a ceiling-mounted barrier fence configured to deploy in a vertically descending arc; 
         FIG. 12A  is a view, enlarged relative to  FIG. 12 , of the portion of  FIG. 12  enclosed within circle A; and 
         FIG. 13  is a cross-sectional view of a bullet and fire-resistant panel suitable for use in the barrier fence of the present invention. 
     
    
    
     DETAILED DESCRIPTION OF THE INVENTION 
     Succinctly stated, the requisites of a crime are the perpetrator&#39;s desire to commit the crime and an opportunity to do so. The opportunity to commit the crime of entering a building for purposes of robbery or vandalizing, or for kidnapping or attacking persons within the building, requires sufficient time and sufficient mobility within the building for the perpetrator to carry out his or her nefarious design. This construct is well illustrated by the horrendous events of the morning of Dec. 14, 2012 when an apparently crazed individual broke into the Sandy Hook Elementary School in Newtown, Conn. and shot and killed twenty first-grade students and six educators. After breaking into the school, the perpetrator had time to move freely and without impediment within the corridors of the school, thereby facilitating his unspeakable crime. 
     The present invention is broadly applicable for use in any location in which prompt deployment of a barrier fence would constrain a perpetrator&#39;s movement and delay if not foreclose his ability to commit the crime. The delay will buy time for law enforcement or security personnel to reach the scene in time to prevent or at least reduce the scope of the crime, as well as to limit or eliminate entirely the perpetrator&#39;s ability to escape. While the present invention has particular applicability to school buildings, it is equally applicable to other structures including, among others, warehouses, hospitals, airport terminals, court houses, government or private office buildings and apartment buildings. 
     Referring now to  FIGS. 1-4A  of the drawings,  FIG. 1  shows a security barrier installation  10  disposed at the end of a hallway  12  of a school building. The installation comprises a pair of storage lockers  14 ,  16  disposed on opposite sides of hallway  12  and aligned with each other. An optional overhead track  18  extends between storage lockers  14  and  16  within which are stored respective sections  26 ,  28  ( FIG. 2 ) of a barrier fence  30  ( FIG. 4 ). Overhead track  18  may be secured to the ceiling (not shown) of hallway  12  or the top of overhead track  18  may abut or be close enough to the ceiling of hallway  12  to prevent a person from passing over overhead track  18 . In some cases a fixed barrier (not shown) may extend downwardly from the ceiling of hallway  12  to abut overhead track  18  or be close enough to it to prevent a person from passing between overhead track  18  and the fixed barrier. The overhead track  18  may be omitted and the top of the barrier fence  30  may extend to or be close to the ceiling of hallway  12 . In other cases, the barrier fence and overhead track  18 , if present, may simply be made high enough to prevent or greatly impede a person from climbing over the barrier fence. In any case, the barrier fence, as more fully described below, may be comprised of hinged panels which may be stowed in storage lockers  14 ,  16  in a folded, compact configuration and opened to form a linearly extending barrier fence or a section thereof. In the illustrated embodiment, storage lockers  14  and  16  are shown disposed at the end of respective rows  20 ,  22  of conventional lockers such as those provided for the convenience of students in most middle and high schools. An optional floor track  24  extends along the floor of hallway  12  beneath, parallel to and aligned with overhead track  18 .  FIG. 1  shows the security barrier installation  10  in its undeployed condition in which egress from and entry into hallway  12  is unimpeded. 
     The barrier fence, as noted above, is desirably made of a ballistic material, that is, a bullet-proof or bullet-resistant material. The transparent panels of the barrier fence may be made from ballistic glass, sometimes referred to as bullet-proof or bullet-resistant glass. The weight of the deployable barrier fence is a significant factor in preparing an efficient and cost-effective installation. Therefore, it will suffice for many or most installations if the ballistic material at least provides resistance to penetration by small arms bullets, and preferably if the ballistic material meets a national ballistic standard for protection against small arms fire. One such appropriate standard is set forth in U.S. National Institute of Justice Standard NIJ Standard 0108-01, September, 1985. It is preferred that the ballistic material employed in the barrier fence of the present invention prevent penetration by small arms fire from Armor Type I to at least Armor Type III of the following Table, which reproduces Table 1 of NIJ Standard 0108.01, or the equivalent. However, in a given case the “ballistic material”, as that term is used herein and in the claims, may be any suitable ballistic material, including one meeting any of the requirements set forth in the following Table or in other national standards including US Underwriter Laboratories Standard UL 752; Australian Standard AS2343; British Standard BS5051; Chinese Standard GA165; Euronorm Standard EN1063; German Standard DIN52290 and Russian Standard GOST R50963-96. The disclosures of these documents are incorporated by reference herein. 
     
       
         
           
               
             
               
                 TABLE 1 
               
             
            
               
                   
               
               
                 Test Summary 
               
            
           
           
               
               
            
               
                   
                 Performance Requirements 
               
            
           
           
               
               
               
            
               
                   
                 Required 
                   
               
            
           
           
               
               
               
               
               
               
            
               
                 Test Variables 
                 Nominal 
                 Suggested 
                 Required 
                 Hits Per 
                   
               
            
           
           
               
               
               
               
               
               
               
            
               
                 Armor 
                 Test 
                 Bullet 
                 Barrel 
                 Bullet 
                 Armor 
                 Permitted 
               
               
                 Type 
                 Ammunition 
                 Mass 
                 Length 
                 Velocity 
                 Specimen 
                 Penetrations 
               
               
                   
               
            
           
           
               
               
               
               
               
               
               
               
               
               
            
               
                 I 
                 22 LRHV 
                 2.6 
                 g 
                 15 to 16.5 
                 cm 
                 320 ± 12 
                 m/s 
                 5 
                 0 
               
               
                   
                 Lead 
                 40 
                 gr 
                 6 to 6.5 
                 in 
                 1050 ± 40 
                 ft/s 
               
               
                   
                 38 Special 
                 10.2 
                 g 
                 15 to 16.5 
                 cm 
                 259 ± 15 
                 m/s 
                 5 
                 0 
               
               
                   
                 RN Lead 
                 158 
                 gr 
                 6 to 6.5 
                 in 
                 850 ± 50 
                 ft/s 
               
               
                 II-A 
                 357 Magnum 
                 10.2 
                 g 
                 10 to 12 
                 cm 
                 381 ± 15 
                 m/s 
                 5 
                 0 
               
               
                   
                 JSP 
                 158 
                 gr 
                 4 to 4.75 
                 in 
                 1250 ± 50 
                 ft/s 
               
               
                   
                 9 mm 
                 8.0 
                 g 
                 10 to 12 
                 cm 
                 332 ± 12 
                 m/s 
                 5 
                 0 
               
               
                   
                 FMJ 
                 124 
                 gr 
                 4 to 4.75 
                 in 
                 1090 ± 40 
                 ft/s 
               
               
                 II 
                 357 Magnum 
                 10.2 
                 g 
                 15 to 16.5 
                 cm 
                 425 ± 15 
                 m/s 
                 5 
                 0 
               
               
                   
                 JSP 
                 158 
                 gr 
                 6 to 6.5 
                 in 
                 1395 ± 50 
                 ft/s 
               
               
                   
                 9 mm 
                 8.0 
                 g 
                 10 to 12 
                 cm 
                 358 ± 12 
                 m/s 
                 5 
                 0 
               
               
                   
                 FMJ 
                 124 
                 gr 
                 4 to 4.75 
                 in 
                 1175 ± 40 
                 ft/s 
               
               
                 III-A 
                 44 Magnum 
                 15.55 
                 g 
                 14 to 16 
                 cm 
                 426 ± 15 
                 m/s 
                 5 
                 0 
               
               
                   
                 Lead SWC Gas 
                 240 
                 gr 
                 5.5 to 6.25 
                 in 
                 1400 ± 50 
                 ft/s 
               
            
           
           
               
               
               
               
               
               
               
               
            
               
                   
                 Checked 
                   
                   
                   
                   
                   
                   
               
            
           
           
               
               
               
               
               
               
               
               
               
               
            
               
                   
                 9 mm 
                 8.0 
                 g 
                 24 to 26 
                 cm 
                 426 ± 15 
                 m/s 
                 5 
                 0 
               
               
                   
                 FMJ 
                 124 
                 gr 
                 9.5 to 10.25 
                 in 
                 1400 ± 50 
                 ft/s 
               
               
                 III 
                 7.62 mm 
                 9.7 
                 g 
                 56 
                 cm 
                 838 ± 15 
                 m/s 
                 5 
                 0 
               
               
                   
                 308 Winchester 
                 150 
                 gr 
                 22 
                 in 
                 2750 ± 50 
                 ft/s 
               
            
           
           
               
               
               
               
               
               
               
            
               
                   
                 FMJ 
                   
                   
                   
                   
                   
               
            
           
           
               
               
               
               
               
               
               
               
               
               
            
               
                 IV 
                 30-06 
                 10.8 
                 g 
                 56 
                 cm 
                 868 ± 15 
                 m/s 
                 1 
                 0 
               
               
                   
                 AP 
                 166 
                 gr 
                 22 
                 in 
                 2850 ± 50 
                 ft/s 
               
               
                   
               
               
                 Abbreviations: 
               
               
                 AP—Armor Piercing 
               
               
                 FMJ—Full Metal Jacket 
               
               
                 JSP—Jacketed Soft Point 
               
               
                 LRHV—Long Rifle High Velocity 
               
               
                 RN—Round Nose 
               
               
                 SWC—Semi-Wadcutter 
               
               
                 m/s = meters per second 
               
               
                 ft/s = feet per second 
               
            
           
         
       
     
       FIG. 2  shows the security barrier installation  10  with barrier fence sections  26 ,  28  partially deployed. Doors  14   a  and  16   a  of storage lockers  14  and  16  are open and one or more drive motors (not shown in  FIG. 2 ) have been actuated, for example, by a master control (not shown), to move barrier fence sections  26 ,  28  towards each other in the direction shown by the unnumbered arrows in  FIGS. 3 and 3A  until the free ends (unnumbered) of barrier fence sections  26 ,  28  meet or, preferably, as illustrated in  FIG. 4 , overlap when barrier fence  30  is in its fully deployed position. 
     As best seen in  FIG. 3A , barrier fence section  26  is comprised of a transparent end panel  26   a  and interior panels, only one of which, interior panel  26   b,  is visible in  FIG. 3A . Open doors  14   a  and  16   a  of storage lockers  14  and  16  are omitted in  FIGS. 3A and 4A  for clarity of illustration. Similarly, barrier fence section  28  is comprised of a transparent end panel  28   a  and interior panels, only one of which, interior panel  28   b,  is visible in  FIG. 3A . Transparent end panel  26   a  terminates in a bumper  26   c  affixed to the free end of barrier fence section  26  and transparent end panel  28   a  terminates in a bumper  28   c  affixed to the free end of barrier fence section  28 . Bumpers  26   c  and  28   c  extend vertically for the entire height of their respective end panels and, as best seen in  FIG. 3 , extend away from each other to ensure smooth passage of transparent end panels  26   a  and  28   a  past each other into the overlapping position shown in  FIGS. 4 and 4A . In an alternate embodiment, end panels  26   a  and  28   a,  whether or not transparent, may abut each other in the fully deployed position. However, some overlapping of the free ends of barrier fence sections  26 ,  28  is much preferred so as to avoid a “seam” between the barrier fence sections  26 ,  28 . The travel speed of barrier fence sections  26 ,  28  is desirably high, for example from about 2 to about 10 feet per second, in order to provide a short time-to-closure period as discussed below. Bumpers  26   c  and  28   c  also serve to push out of the way an object which or a person who might otherwise be trapped between the closing barrier fence sections  26 ,  28 , which preferably will not stop or retract if they encounter an obstacle which can be pushed aside. The barrier system may include sensors which will avoid imposing lethal force upon a person trapped between a closing barrier fence section and a rigid structure or between two closing barrier fence sections, yet will not open towards the undeployed position to easily release the trapped individual or object. Accordingly, bumpers  26   c  and  28   c  are preferably made of a soft material such as a soft foam rubber or the like in order to avoid or minimize injury of someone who is pinched between the closing panels. Because the barrier system is designed to respond to an emergency situation, for example, in reaction to an alarm or other signal indicating the presence of one or more intruders, the rate of closing of the barrier fence sections  26 ,  28  is desirably high. 
     Generally, it is preferred that only a short time-to-closure period be required for movement of the barrier fence from its undeployed, i.e., stowed, position in which the security area associated with the barrier system is open to passage therethrough by a person or persons, and its fully deployed position in which the barrier fence closes the security area to any such passage. Rapid closing will of course aid in frustrating the efforts of interlopers to penetrate the barrier system and it is preferred that the aforesaid time-to-closure period be not more than about 3 to 4 seconds although shorter or longer time periods, for example, for about 1 to about 10 seconds or more may be appropriate depending on the layout, dimensions and security needs of a given installation. For example, assume that a security barrier comprises a single barrier fence section which moves horizontally as illustrated (for a two-section barrier fence) in  FIG. 3 , that a time-to-closure period of about 3 seconds is required, and that the security barrier must close a 15-feet wide hallway. The single barrier fence would have to have a travel speed of about 5 feet per second. For another example, assume that the same conditions and requirements apply, but there are two barrier fence sections ( 26 ,  28  in  FIG. 4 ) which move horizontally towards each other, as indicated by the unnumbered arrows in  FIG. 3 . In this case, each fence section would have a travel speed of about 2.5 fps to provide a closing rate of 5 fps and a 3 second time-to-closure period. While any desired closing speed may be utilized, as indicated above, in most cases a high closing speed and therefore a short time-to-closure period is desirable. 
     As seen in  FIGS. 4 and 4A , (as noted above, open locker doors are omitted from  FIG. 4A ) when barrier fence  30  is fully deployed, transparent end panels  26   a,    28   a  overlap and enable law enforcement or other security personnel to observe what is transpiring beyond the deployed barrier fence  30 . After the situation which prompted deployment of the barrier fence, whether an emergency or a routine test of the system, the barrier fence may be undeployed, that is, returned to the storage lockers  14 ,  16  for stowage. This may be effectuated by either or both of the master control system and the secondary controls as described below. 
     The barrier fence is preferably constructed so that the joints between adjacent panels meet at least the same national standards for resistance to small arms fire as described above. That is, there should not be any places along the deployed barrier fence  30 , including joints between panels, which fail to meet the above-noted national standards for resistance to penetration by small arms fire or projectile fragments. 
     Floor track  24  and overhead track  18  respectively engage the bottom (unnumbered) and top (unnumbered) of the deployed barrier fence sections  26 ,  28  to provide stability to them and thereby to resist a person or persons pushing against the deployed barrier fence sections  26 ,  28  which, in their fully deployed position illustrated in  FIGS. 4 and 4A , cooperate to comprise barrier fence  30 . 
     Referring now to  FIG. 5 , there is shown schematically a plan view of two hallways  12  and  12 ′ which perpendicularly intersect each other to define a common area  32 . Four security barrier installations  10 ′ are shown schematically disposed at the intersection of hallways  12 ,  12 ′. A detection system  39 , for example, a closed circuit television camera, is positioned to detect intruders. Each security barrier installation  10 ′ may be identical or similar to security barrier installation  10  illustrated in  FIGS. 1-4A  and each comprises associated storage lockers  14 ′ and  16 ′. Secondary control panels  34   a,    34   b  are associated with each of their respective security barrier installations  10 ′. In each case, secondary control panels  34   a  and  34   b  are disposed on opposite sides of their associated security barrier installation  10 ′. Secondary control panels  34   a  and  34   b  are locked and may be opened only by personnel in possession of a customized, suitable unlocking device. The secondary control panels are operatively connected to the control system to operate the barrier fence to provide the limited access opening in the barrier fence, and may be located adjacent to the barrier fence. The secondary control panel may be responsive to a coded signal to unlock the secondary control panel. Once unlocked, the secondary control panel may be operated to move one or both of barrier fence sections  26 ,  28  ( FIGS. 2 and 3A ) at least partly towards the stowed or undeployed position in order to provide access through the barrier fence  30  ( FIGS. 4 and 4A ). As described in more detail below, only authorized personnel such as law enforcement or security personnel will be equipped with unlocking devices which enable them to open or partially open the security barrier fence to provide access through it. 
     Referring now to  FIG. 6 , there is schematically illustrated a master control system to control operation of security barrier installations  10 ′, two of which are illustrated in  FIG. 6  and comprise, respectively, drive motor pairs  36   a,    36   b  and  38   a,    38   b.  Two drive motors are operatively associated with each barrier fence section, such as barrier fence sections  26  and  28  shown in  FIGS. 2 and 3A . Controls are contained in master control area  40  to operate one or both of the pairs of paired drive motors  36   a,    36   b  and  38   a,    38   b  when an intruder or intruders are detected by a detection system in an area to be secured. Such detection may of course be by personal observation, or by one or more detection devices such as closed circuit television cameras, motion detectors, infrared sensors or any suitable detection device or devices. Typically, master control area  40  will be a secure area which may be somewhat remote from the areas to be secured, e.g., hallways  12  and  12 ′ of  FIG. 5  and/or the common area  32  where these hallways overlap. Master control area  40  may contain a bank of television monitors or other instruments receiving signals from the detection devices. Master control area  40  will also contain controls to operate the drive motors associated with the security barrier installation or installations  10 ′ to deploy the barrier fence sections  26 ,  28  ( FIG. 4 ) to form barrier fence  30 . Operation of the drive motors to form a barrier fence may be carried out by manual actuation of controls by an operator in response to detection signals. Alternatively, receipt of a detection signal may automatically actuate selected drive motors to deploy the barrier fences. It will be appreciated that any suitable drive train may be utilized to connect the drive motors to the barrier fence sections  26 ,  28 . It will be appreciated from  FIG. 5  that when a plurality of barrier fences are properly disposed relative to each other, when each of the plurality of barrier fences is in its fully deployed position they cooperate to define between or among them a fully enclosed or isolated security area, such as common area  32 . 
     As schematically illustrated in  FIG. 6 , signals to the drive motors  36   a,    36   b  and  38   a,    38   b  and to a remote emergency response facility, such as a police station  42  may be sent along one or more communication paths, such as communication paths  44   a,    44   b,    44   c,    44   d  and  44   e.  These communication paths may be electric transmission wires, wireless signals such as radio frequency or other signals or any suitable combination thereof. The communication device or system in the master control area is also equipped to automatically, upon deployment of the barrier fence, or independently, send a signal to the police station  42  to alert law enforcement officials that one or more barrier fences have been deployed and that assistance is needed at the sites of the security barrier installations. Obviously, the signal may be sent to a security force other than one located at a police station, for example, to a military installation in the case of intruders at a government facility, or to an on-site security force. In addition, an audio and/or visual or other alarm or signal may be sent to occupants of the building to shelter down and lock doors or, in an appropriate case, to evacuate the building via specified exits. 
     In use, once an intruder or intruders are detected, the appropriate security barrier installations  10 ′ are activated to block off selected areas of the building to be secured. Referring again to  FIG. 5 , assume that all four of the barrier fences of the security barrier installations  10 ′ have been deployed in response to the presence of intruders. Assume further that an intruder  46  is trapped by the deployed barrier fences within common area  32  and that law enforcement personnel  48  arrive at the scene and position themselves in hallway  12 ′ on the opposite side of a barrier  10 ′ from the intruder  46 . Law enforcement personnel may observe the intruder through the transparent overlapping end panels  26   a,    28   a  ( FIGS. 4 and 4A ). If the law enforcement personnel determine that the intruder  46  is prepared to surrender or that it is necessary to attack him with either lethal or non-lethal weapons, one of the law enforcement personnel will open the normally locked secondary control panel  34   a  and operate the secondary controls therein contained to at least partially open barrier fence  30  ( FIGS. 4 and 4A ) at least sufficiently to provide a limited access opening in the barrier fence to enable law enforcement personnel to enter the common area  32  to effectuate capture or disablement of the intruder  46 . Of course, the barrier fence  30  may also be at least partially opened by the master control system. 
     Alternatively, or in addition to partially opening the barrier fence, a locked access panel  28   d  ( FIG. 4A ) may be provided in the barrier fence  30 . Access panel  28   d  may be opened by an authorized person provided with a key or other opening device to provide such limited access opening in the fully deployed barrier fence  30 . Alternatively, or in addition, access panel  28   d  may be unlocked or opened via the control system. 
     The secondary control panels  34   a  and  34   b  obviously must not be capable of being opened by the intruder  46  or by anyone other than authorized personnel. Control of the ability to open any of the secondary control panels  34   a,    34   b  to enable operating the barrier fence to at least partially open it may be attained by providing law enforcement or other authorized personnel with a mechanical or electronic key to open the secondary control panels. One way to effectuate this is to provide the authorized personnel with a radio frequency identification (“RFID”) module which is recognized by the lock securing the secondary control panels  34   a ,  34   b.  Law enforcement personnel may be provided such RFID modules upon their arrival at the site, or they may routinely carry such RFID modules on their persons in anticipation of being called to the installation site. For example, the RFID module may be incorporated into the law enforcement officer&#39;s uniform, cap, belt or any other convenient location. Another way of providing access to the controls of the secondary control panels  34   a,    34   b  is to provide a suitable key, RFID module, etc., in a Knox box permanently installed at the building site. Such Knox boxes are well known and typically one or more are permanently installed in buildings so that fire fighters or emergency personnel of any kind who have been supplied with keys to open the Knox box may open the Knox box to access RFID modules, keys or the like needed to operate fire doors, elevators and the like in an emergency. RFID modules, keys or the like to operate the secondary controls of barrier fence  30  may be kept in one or more Knox boxes. 
     It is desirable for law enforcement or other security personnel to be able to partially open barrier fence  30  at any point along the barrier fence, especially at the point or points where transparent panels or other transparent sections may be located. Although the illustrated embodiments show the transparent panels as being provided at the point where the end panels of the barrier fence sections  26 ,  28  overlap, it is obvious that transparent panels or sections may also or alternatively be located at different points along the deployed barrier fence  30 . The ability to control at least partial opening of the barrier fence  30  from a location where the operator can observe through the transparent panels or sections the intruder or intruders and their actions is highly advantageous. A number of expedients are available to enable law enforcement or security personnel to at least partially open the deployed barrier fence  30  ( FIGS. 4 and 4A ) at selected points along its length. For example,  FIG. 5  schematically shows secondary control panels being provided as floor-mounted secondary pedal control panels  134   a,    134   b.  The pedal control panels, like the secondary control panels  34   a,    34   b,  are disposed on either side of the barrier fence  30  and may be accessed only by those who are provided with an RFID module, key or the like to access the secondary control panels, which are conveniently operated by foot pedals. As illustrated, secondary pedal control panels  134   a,    134   b  are positioned near the center of barrier fence  30  where, in the illustrated embodiments at least, the transparent panels are located. The secondary pedal control panels may be located at any convenient point or points along barrier fence  30  at both sides thereof. 
       FIG. 5  also shows, with respect to only one of the secondary control panels  34   a,  a portable secondary control  35 . Secondary control  35  is a hand-held device which is secured within secondary control panel  34   a.  Law enforcement or other authorized personnel, once they open secondary control panel  34   a,  may remove the portable hand-held secondary control  35  to operate barrier fence sections  26 ,  28  to at least partially open barrier fence  30 . An extension cord  35   a  is shown connected to portable secondary control  35 . Portable secondary control  35  could be wireless operated, thereby obviating the need for extension cord  35   a.  Both secondary pedal control panels  134   a,    134   b  and a hand-held portable secondary control  35 , or only one of them, may be provided. 
       FIG. 7  is a schematic plan view showing storage locker  14  of  FIGS. 1, 2 and 3  having therewithin a stowed barrier fence section  26  comprised of a transparent end panel  26   a  and a plurality of interior panels  26   b.  The panels are hinged so that when the door  14   a  is opened by actuation of the drive motor associated with barrier fence section  26  and a control drive (not shown) exerts a force as indicated by the arrow F in  FIG. 7 . The panels will unfold and deploy into the extended staggered configuration shown in  FIG. 7A . In addition to the hinges, as shown in  FIG. 7B , individual panels are interlocked by engagement members  50  to extend the panels  26   a,    26   b  into the configuration shown in  FIG. 7A  in order to deploy the barrier fence  30 . The bumpers  26   c,    28   c  are illustrated in  FIGS. 7-8A  as being connected to respective end panels  26   a,    28   a.  Not shown is a locking mechanism which will lock the bumpers into their angled positions upon deployment of the barrier fence. Alternatively, bumpers  26   c ,  28   c  could be permanently rigidly affixed to their associated end panels at the appropriate angle. 
       FIG. 8  shows an alternate embodiment in which the panels  26   a,    26   b  are hinged so that an imposition by the drive control (not shown) of a force indicated by the arrow F in  FIG. 8  will extend the panels in an aligned fashion for deployment as shown in  FIG. 8A . 
       FIG. 9  shows the partial deployment of barrier fence sections  26 ,  28  from storage as illustrated (for barrier fence section  26 ) in  FIG. 8 . 
       FIG. 10  shows an alternate embodiment in which instead of folded and hinged panels, barrier fence sections  26 ′ and  28 ′ are comprised of respective vertically oriented rolls of ballistic material which are deployed by being spooled from respective vertical shafts  52   a,    52   b . Overhead and floor tracks (not shown in  FIG. 10 ) help to hold the deployed barrier fence sections  26 ′,  28 ′ in place. 
       FIG. 11  shows another embodiment of a security barrier installation  110  in accordance with another embodiment of the present invention. In this case, storage lockers  114  and  116  are built into the walls defining hallway  112  so that the door  114   a  of storage locker  114  is flush with the wall  54 . The door of storage locker  116 , not visible in  FIG. 11 , is similarly flush with the inner surface of the wall  56  opposite the wall  54 . An optional overhead track  118  and an optional floor track  124  are provided as in the other embodiments. Floor track  124  is located in the floor of the security area and extends along the travel path of the barrier fence. The bottom of the barrier fence engages the floor track during movement of the barrier fence between the undeployed and fully deployed positions. The overhead track  118  extends along the travel path of the barrier fence and the top of the barrier fence engages the overhead track  118  during movement of the barrier fence between the undeployed and fully deployed positions. It will be appreciated that the embodiment of  FIG. 11  is well suited for new construction wherein the security barrier installation is installed in connection with construction of the building. 
       FIG. 12  is a schematic view in which a barrier fence  130  is mounted in or adjacent a ceiling  58  for operation by a drive member  60  by a drive motor  136 . Upon deployment, barrier fence  130 , which is connected by hinge  62  to ceiling  58 , is deployed in the arc indicated by the unnumbered curved arrow in  FIG. 12  to engage a lip  64  ( FIG. 12A ) which normally covers recessed floor track  124 . Lip  64  is automatically raised to the position indicated in  FIG. 12  upon actuation of the drive motor  136  and helps to stabilize the lower end  130   a  of barrier fence  130  when it is deployed. It will be appreciated that depending on the width of the hallway or other area to be sealed off, barrier fence  130  may comprise a single unitary fence or it may be comprised of a series of adjacently disposed fences. A section of barrier fence  130  may be comprised of a transparent ballistic material for the reasons described above. In addition to the ballistic characteristics of the panels, desirably the panels may also be made fire-resistant.  FIG. 13  shows a segment of a panel  26 ″ comprising a pair of spaced apart bullet-resistant panels  66  which sandwich between them a suitable fire-resistant material  68 . 
     Supplemental features such as audio, visual and dispensing devices for incapacitating agents may be provided to supplement the deployable barrier fence system disclosed above. Controls for such supplemental features could be automatically operated upon deployment of the barrier fence or selectively as needed by a human operator. For example, alarms, smoke, painfully loud and disconcerting noises, blinding and flashing lights such as strobe lights, may be suitable to use in certain environments to distract, disorient and/or inhibit or prevent communication between or among multiple intruders. In addition, incapacitating agents such as tear gas, other temporary disabling gases or sprays, etc., may be employed. These supplemental features would be more appropriate for environments such as warehouses where there is not present an innocent population such as one would find in schools, or office and apartment buildings. However, one or more of the supplemental features may be used after hours in schools or other buildings occupied by the public during normal operating hours. Further, in an apartment building it may be appropriate to have such supplemental devices in place because the innocent population may be expected to be within their apartments behind closed doors while the disabling or distracting agents could be employed, if the situation warrants, in the hallways or corridors. In such cases, it would be preferable that the supplemental features be selectively operated by a security person instead of automatically upon deployment of the barrier fence. 
     It will appreciated that the disclosed system provides rapid, nearly instantaneous deployment of a barrier fence to isolate selected areas of a building to impede freedom of movement of an intruder and/or trap the intruder within a selected area. Responding law enforcement or other personnel can observe the tactical situation through the transparent panels and may open the deployed barrier fence sufficiently to gain access to the intruder or other area. Optionally, disorienting, distracting and/or temporarily disabling supplemental features may also be deployed. 
     While the invention has been described in connection with specific embodiments thereof, it will be appreciated that numerous other embodiments which lie within the scope of the present invention may be readily devised based on the disclosure contained herein.