Patent Publication Number: US-2020291699-A1

Title: Door Security Kit And Method for Preventing Hostile Opening Of A Door

Description:
CROSS-REFERENCES TO RELATED APPLICATIONS 
     Not applicable. 
     STATEMENT REGARDING FEDERALLY SPONSORED RESEARCH OR DEVELOPMENT 
     Not applicable. 
     NAMES OF THE PARTIES TO A JOINT RESEARCH AGREEMENT 
     Not applicable. 
     BACKGROUND OF THE INVENTION 
     (1) Field of the Invention 
     The field of the present inventive concept relates generally to methods and equipment utilized to provide an ultra-strong door protective device that can be readily locked by a threatened user from inside the room to be secured. The April 2007 shooting at Virginia Tech has been one of the numerous violent incidents, of a deranged shooter breaching a door within a school, business, or other facility and committing deadly mayhem upon the occupants of one or more rooms. 
     In particular, classroom doors are usually not constructed with a locking device that may be locked from the inside. Therefore students and school staff personnel are not able to quickly buttress the door against opening as a protective measure. As a result, an assailant has no difficulty breaking into the room, whether it be a school room or a commercial office. The present inventive concept discloses a door security device comprising a portable, lockable metal compartment which engages a corresponding metal, notched strike plate, the strike plate being mounted to a metal door frame which is enveloped within the wall. 
     (2) Description of the Related Art, Including Information Disclosed Under 37 CFR 1.97 and 1.98. 
     U.S. Pat. No. 10,072,455; Smith; Sep. 11, 2018. A temporary door latch device for a pre-hung door and casing. The door has a door lock cylinder opening and a door latch opening and the casing has a latch bolt opening. The device includes a female portion having a pair of opposed and spaced apart resilient fingers, each of said fingers having a plurality of inwardly extending teeth thereon. The female portion is receivable in the door lock cylinder opening and the door latch opening. The male portion has a pair of opposed and spaced apart fingers, each of the fingers having a plurality of teeth thereon. The male portion is receivable in the latch bolt opening and the door latch opening. The teeth on the female portion engage the teeth on the male portion in one orientation and are disengaged in another orientation. 
     U.S. Pat. No. 10,151,127; Shell, R.; Dec. 11, 2018. The present invention relates to a keyless portable lock for a door. The portable door lock includes a horizontal bar that lays across the door and/or the door frame and a strap with one or more holes. The user pulls on the strap, closes the door and inserts a rod through the one or more strap holes so that the rod lays across the door and the frame on the opposite side of the door as the horizontal bar. This action will prevent the door from being opened. A transverse bar may extend from the horizontal bar at approximately 90 degree angle so that the portable door lock is generally in the shape of an “L.” 
     U.S. Pat. No. 10,125,526; Mahoney, et. al.; Nov. 13, 2018. A door security apparatus is disclosed herein. The door security apparatus comprises a sleeve member, a door engagement member and a spacer, and is configured to engage a double-lever arm door closer to allow for the locking, of a door from the inside. The apparatus further comprises a locking mechanism for keeping the apparatus attached to the door closer. The door engagement member is configured to engage the top edge of a door, the sleeve member is configured to slidably engage the double-lever arm door closer, and the spacer is configured to connect the door engagement member and the sleeve member. 
     U.S. Pat. No. 10,041,273; Dieguez, R.; Aug. 7, 2018. An auxiliary lock for preventing a hinged door from opening all the way is provided. The lock comprises a strike plate, a flip lock plate, a catching member to receive a door knob or handle, and a means for connecting the catching member and flip lock plate. In an embodiment, the strike plate may be configured to replace any standard strike plate disposed on an inside portion of a door jamb, and the flap lock plate may longitudinally extend from a hinged connection with strike plate in the direction of an opening door so as to optionally block the door from opening and avoid obstructing a swinging door when disengaged. In use, the catching member may be placed around the door knob or handle so that the means for connecting the catching member and flip lock plate form an inseparable link between the door jamb and door itself. 
     U.S. Pat. No. 9,127,489; Orlov, et. al.; Sep. 8, 2015. A door stop includes a body having a longitudinal axis and a rotating toggle operably connected to the body. The toggle is rotatable such that a longitudinal axis of the toggle aligns with the longitudinal axis of the body in an insertion position and the longitudinal axis of the toggle is transverse to the longitudinal axis of the body in a locked position. The door stop includes a lock assembly operably mounted to the body to lock the toggle. Monitoring circuitry provides indication of a location of the door stop and/or an alarm mode. 
     BRIEF SUMMARY OF THE INVENTION 
     The disclosed security device, referred to as a Door Security Kit  1 , comprises a modified strike plate  70  and a door guard assembly  2 . The Door Security Kit I is utilized to prevent a door enclosed in a metal doorframe from being forceably opened under circumstances which threaten the safety of the occupants of a room. The Door Security Kit  1  essentially comprises two components: a modified strike plate  70 , and a portable, removable door guard assembly  2 . 
     The door guard assembly  2  comprises a cuboid-shaped compartment  10  which further manifests a vertically-oriented channel  27  and an internally-mounted mortise cylinder  51 . The mortise cylinder  51  is mechanically connected to a straight cam  52 , which cam  52 , during the course of manually activated rotation, makes forceful contact with, and activates, a locking and un-locking mechanism. A standard control key  57  is used to operate the mortise cylinder  51 , which is permanently attached within the compartment  10 . The door  60  which is to be secured, in the preferred embodiment, is housed, and operates within, a commercial metal door frame  68 . 
     The aforementioned mortise cylinder  51 , when turned by the control key  57 , activates a mechanism to modify the internal dimension of an adjustably-sized channel  27 . The adjustably-sized channel  27  functions, in a locked configuration, by clamping onto the modified strike plate  70 , thereby preventing movement of the subject door within the doorframe. The modified strike plate  70  conforms to ASA and ANSI standards, and, in the preferred embodiment, is installed in the door frame  68  within which the protected door  60  is hung. 
    
    
     
       BRIEF DESCRIPTION OF THE VIEWS OF DRAWINGS AS EXEMPLARY EMBODIMENTS OF THE INVENTIVE CONCEPT 
         FIG. 1  is a view of the Door Security Kit  1  as seen from the perspective of a user having installed the Door Security kit  1 , by clamping the door guard assembly  2  onto the vertically-oriented round  76  of a modified strike plate  70 . 
         FIG. 2  is a side view of the cover  11 , having been removed from its attachment to the main compartment  10  of the door guard assembly  2 . Further displayed is the mortise cylinder  51 , cylinder spacers  50 , mortise cylinder nut  53 , modified straight cam  52 , lever arm  54 , and the control key  57 . 
         FIG. 2A  illustrates a typical machine screw  14  used in assembling components of the door guard assembly  2 . 
         FIG. 2B  displays a downward-looking view of the door guard assembly  2  as it is secured into position against the interior surfaces of a door jamb  62  and a door  60 . 
         FIG. 3  illustrates the inner surface  16  of the cover  11 , the cover  11  having been detached from the compartment  10  of the door guard assembly  2 . Further shown is a raised platform  59 , which has been permanently attached onto the inner surface  16  of the cover  11 . A mortise cylinder  51  is shown, attached to a lever arm  54 , in the unlocked configuration. 
         FIG. 4  again illustrates the inner surface  16  of the cover  11 , with the cover  11  having been detached from the compartment  10  of the door guard assembly  2 . In  FIG. 4 , the lever arm  54  is shown oriented upward, corresponding to the locked configuration of the door guard assembly  2 . 
         FIG. 5  is a rendering of the interior of the compartment  10  (after removal of the cover  11  from the door guard assembly  2 ) in the locked configuration. Further shown in  FIG. 5  is the U-bracket  41 , adjustable channel  27 , the lock-arm  44 , ledge  42 , fork  43 , and mainspring  32 . 
         FIG. 6  depicts the interior of the compartment  10  (after removal of the cover  11  from the door guard assembly  2 ) in the unlocked configuration. Further shown in  FIG. 6  is the strike plate  40 , adjustable channel  27 , the lock-arm  44 , ledge  42 , fork  43 , and mainspring  32 . 
         FIG. 7  presents a view of the rear face  23 ( a ) of the vertical panel  23 , with the Door Security  1  in its fully-assembled condition. Other features shown include an open, adjustably-sized channel  27 , an upper flange  18 , and a lower flange  19 , the lower flange  19  being integral to a locking plate  40 . 
         FIG. 8  presents a side view of the compartment  10  in accordance with section line  8 - 8  of  FIG. 7 , after removal of the cover  11 . Further shown are the U-bracket  41 , fork  43 , ledge  42 , lock-arm  44 , post  38 , and the mainspring  32 . 
         FIG. 9  depicts a downward-looking view, or plan view of  FIG. 8 . Shown are the fastening tabs  30 , U-bracket  41 , fork  43 , ledge  42 , lock-arm  44 , post  38 , and the adjustably-sized channel  27 . 
         FIG. 10  is the profile view of the modified strike plate  70  as seen looking vertically downward, and further illustrating the modified strike plate  70  being attached to a door jamb  62 . 
         FIG 11  depicts a view of the modified strike plate  70 , including the bolt-hole  75 , a top notch  71  having two shoulders  73  and a cut-out depth, and a bottom notch  72 , having two shoulders  73  and a cut-out depth. 
     
    
    
     DETAILED DESCRIPTION OF THE INVENTION 
     The objects, features, and advantages of the inventive concept presented in this application are more readily understood when referring to the accompanying drawings. The drawings, totaling thirteen figures, show the basic components and functions of embodiments and/or methods of use. In the several figures, like reference numbers are used in each figure to correspond to the same component as may be depicted in other figures. 
     A general description of the Door Security Kit  1  begins with the modified strike plate  70 , which features a linear, vertically-oriented curved segment, or round  76 . The round  76  is constructed with a longer-than-standard lateral dimension, and also features a top notch  71  and a bottom notch  72 , as shown in  FIG. 10  and  FIG. 11  herein. When the strike plate  70  is mounted within a metal door frame  68 , the round  76  protrudes into the protected room, and thereby exposes the top notch  71  and bottom notch  72 . In operation of the Door Security Kit  1 , a user places the compartment  10  of the door guard assembly  2  in abutment to the round  76  of the strike plate  70 . 
     This positioning causes the vertically-oriented, adjustably-sized channel  27  (shown in  FIG. 5  and  FIG. 6 ) to be in close proximity to the top notch  71  and bottom notch  72  of the strike plate  70 . At this juncture, a user turns the control key  57  clockwise, causing the adjustably-sized channel  27  to diminish in length and to clamp onto both notches  71 ,  72 . The compartment  10  then becomes fully flush simultaneously with the door  60  and doorframe  68 . The resultant condition is that the Door Guard Kit  1  barricades the door against all attempts to move the door  60  out of the doorframe  68 . 
     As an operational feature to be noted, the control key  57  cannot be removed from the mortise cylinder  57  unless the door guard assembly  2  is in the locked position. A user may place the door guard assembly  2  on the modified ASA strike plate  70  and allow the door guard assembly  2  to rest on the top notch  71  of the modified strike plate  70 . By rotating the control key  57  in the opposite, clockwise direction, the modified straight cam  52  on back of the mortise  51  cylinder will engage the ledge  42  of the U-bracket  41 , and move it upwards. The upward motion of the ledge  42  causes the adjustably-sized channel  27 to diminish in open length and thereby engage both the bottom notch  72  and the top notch  71  of the modified strike plate  70 . This engagement locks the door guard assembly  2  to the modified strike plate  70 . The locking of the door guard assembly  2  rigidly retains the door  60  within the metal door frame  68 , and the control key  57  can be removed. In a different embodiment, a wall-mounted (or door-mounted) stowage rack  69  may be used wherein the door guard assembly  2  may be similarly clamped and locked onto upper and lower notches of the stowage rack  69 , and the control key  57  may then be removed. 
     Referring to  FIG. 1 , there is illustrated a view of the Door Security Kit  1  as seen from the perspective of a user having just enabled the security function of the Door Security Kit  1 , by clamping the door guard assembly  2  onto the modified ASA strike plate  70 . The control key  57  has been turned to the locked position. The modified strike plate  70  is constructed into the metal door frame  68  of a doorway, with the vertically-oriented round  76  protruding and in view. The exterior  56  of the mortise cylinder  51  is shown as it fits within a circular aperture in the exterior surface  17  of the cover  11  of the door guard assembly  2 . 
       FIG. 2  presents a side view of the cover  11 , having been removed from its attachment to the main compartment  10  of the door guard assembly  2 . Further displayed are the mortise cylinder  51 , cylinder spacers  50 , mortise cylinder nut  53 , modified straight cam  52 , lever arm  54 , and the control key  57 .  FIG. 2(A)  illustrates a typical machine screw  14  used in assembling components of the door guard assembly  2  by fastening the cover  11  to the sides of the compartment  10  in some embodiments. In other embodiments, different means of fastening the cover  11  may be used. 
     The cover top edge  15 , counter-sunk holes  12 , cover inner surface  16 , exterior surface  17 , and mortise cylinder exterior  56  are further shown in  FIG. 2 . The mounting platform  59 , a bent, rectangular-shaped structure, contains the outer diameter of the mortise cylinder  51 . 
     In viewing  FIG. 2(B) , there is shown a stylized, downward-looking view of the door guard assembly  2  is shown imminent to its placement into position for abutment against the interior surfaces  67  of a door  60  and the interior of its associated doorframe  68 . The modified strike plate  70  is depicted as constructed into the doorframe  68 . A bolt  64 , internal to the door  60 , is shown in contact with the modified strike plate  70 , as the door  60  approaches the closed position. 
       FIG. 3  illustrates the inner surface  16  of the cover  11 , with the cover  11  having been detached from the compartment  10  of the door guard assembly  2 . Also depicted is the raised platform  59 , which has been permanently welded or attached onto the inner surface  16  of the cover  11 . A circular hole corresponding to the diameter of the mortise cylinder  51  is constructed through both the cover  11  and the center of the platform  59 , which then facilitates the securement of the mortise cylinder  51  within both the platform  59  and the cover  11 . The modified straight cam  52  and attached lever arm  54  are further exposed. By counter-clockwise turning of the control key  57  (not shown) in the keyway  58 , the straight cam  52  and lever arm  54  are also caused to be rotated, which places the door guard assembly  2 , when fully assembled, in an unlocked configuration. 
       FIG. 4  presents the diametrically opposite configuration of the components integral to the inner surface  16  of the cover  11 . Again, the cover  11  is shown having been detached from the compartment  10  of the door guard assembly  2 . Shown are the raised platform  59  and the mortise cylinder  51  anchored in place through both the cover  11  and the center of the platform  59 . The modified straight cam  52  and attached lever arm  54  are further displayed. However, conversely to  FIG. 3 , by clockwise rotation of the control key  57  (not shown) in the keyway,  58 , the cam  52  and lever arm  54  are shown oriented upward, which places the door guard assembly  2 , when fully assembled, in the locked configuration. 
     Next, in referring to  FIG. 5 , there is shown an interior view of the compartment  10  of the door guard assembly  2  (with the cover  11  having been removed). This illustrated condition depicts the locked configuration of the compartment  10  of the door guard assembly  2 . This configuration results from the mortise cylinder  51  having been rotated clockwise to force the bottom of the ledge  42  upward. The internal functioning of the bracket  41  is the most significant information to be noted from  FIG. 5 , as the upward movement of the U-bracket  41  results from its direct connection to the ledge  42 . The locked configuration shown is reached when, a user rotates the control key  57  in a clockwise direction. 
     The clockwise rotation of the control key  57  causes the lever arm  54 , attached to the straight cam  52  and mortise cylinder  51  (see  FIG. 3  and  FIG. 4 ) to both rotate clockwise and, upon reaching a vertical orientation, forcibly engage the bottom surface of the ledge  42 . The ledge  42  is integral to, and orthogonally connected to the U-bracket  41 . 
     The U-bracket  41  abuts the front face  23 ( d ) of the vertical panel  23  and is through-connected, by virtue of four plate fasteners  37 , the fasteners  37  extending rearward, and connecting to a similarly-dimensioned, planar locking plate  40  (not shown) on the panel rear face  23 ( a ) of the compartment  10 . 
     As shown in  FIG. 5 , the culmination of the upward movement of the ledge  42  eventually provides sufficient clearance for the shoulder  46  (hidden from view) of the lock-arm  44  to slide to the left, and underneath the ledge  42 , thereby giving further enforced support and stability to the ledge  42  in the locked position. The entire width of the lock-arm  44  then fits into the gap of the fork opening  47 . This condition is also illustrated in  FIG. 9 . The lever arm  54  is simultaneously placed in a vertical supporting mode directly beneath the ledge  42 . 
     This movement of the ledge  42  into the locked configuration shown in  FIG. 5  forces the mainspring  32  to expand and load up with tension. The mainspring  32  remains alignment with its attachment at its upper end to a top fastener  33 , and attachment at its lower end to a bottom fastener  34 . This is the locked configuration of the Door Security Kit  1  shown in  FIG. 4 , as well as depicted by the locking position of the lever arm  54 , as illustrated in  FIG. 9 . 
     In the locked configuration, the rear-located locking plate  40  (see  FIG. 7 ) has been raised to the upper bay limit  25 , this limit being illustrated in  FIG. 7  and  FIG. 8 . As a direct result of the raising of the locking plate  40 , there is created a smaller opening of the adjustably-sized channel  27  of the rear panel  23 . The smaller opening of the adjustably-sized channel  27  creates a steadfast clamping effect which locks the upper flange  18  of the vertical panel  23  and the lower flange  19  of the U-bracket  41  onto the top notch  71  and the bottom notch  72 , respectively, of the corresponding modified strike plate  70 . 
       FIG. 6  illustrates the result of the internal functioning within the compartment  10  of the door guard assembly  2 . In this instance counter-clockwise turning of the key  57  causes downward rotation of the modified straight cam  52  (shown in  FIG. 3  and  FIG. 4 ), rendering disengagement of the lock-arm  44  from the undersurface of the ledge  42 . In this position, the downward movement of the lever arm  54  allows the ledge  42  to move downward, which in turn frees the U-bracket  41  and its lower flange  19  to a lower orientation, releasing the clamping against the bottom notch  72  (not shown) of the modified strike plate  70 . Correspondingly, the clamping of the top notch  71  of the strike plate  70  by the upper flange  18  is also relieved, thereby forming the unlocked configuration of the compartment  10  of the door guard assembly,  2 . 
     It is to be noted, in  FIG. 6 , that the cover  11  has been removed). The positioning of the U-bracket  41  is also notable, as it is illustrated as retained in its unlocked positon by virtue of tension of the mainspring  32  asserting a downward pull on the top fastener  33 , which is attached to the lower section  41 ( a ) of the U-bracket  41 . The U-bracket  41  is through-connected, by virtue of four plate fasteners  37  which fasteners  37  extend rearward, connecting to a similarly-shaped, planar locking plate  40  (not shown) on the panel rear face  23 ( a ) of the compartment  10 . 
     The unlocked configuration is attained when a user rotates the control key  57  in a counterclockwise direction. The counterclockwise rotation of the control key  57  causes the lever arm  54 , attached to the modified straight cam  52  (shown in  FIG. 3  and  FIG. 4 ) of the mortise cylinder  51 , to also rotate and thereby disengage itself from its abutment with the lower section  41 ( a ) of the ledge  42 . Continued counterclockwise rotation of the lever arm  54  also terminates the underlying vertical support supplied to the ledge  42 , by the lever arm  54 . 
     Also, relative to the view shown in  FIG. 6 , the lever arm  54 , as it passes through approximately 225 degrees of counter-clockwise rotation, the lever arm  54  comes into contact with, and pushes aside the lock-arm  44 . The ledge  42  then loses its under-support, and the mainspring  32  is fully free to pull the ledge  42  and U-bracket  41  downward. Simultaneously, the contoured shoulder  46  of the lock-arm  44  then permits the fork opening  47  to encompass the width and length of the lock-arm  44 . This condition is also shown in  FIG. 9 . 
     In referring to  FIG. 7 , there is shown a view of the rear panel  23 ( a ) of the compartment  10 , and door guard assembly  2 , further showing the locking plate  40 . As mentioned previously, the locking plate  40  is connected, by fasteners  37 , directly to the U-bracket  41  in the interior of the compartment  10 . The locking plate  40  is designed to slidingly travel within a rectangular bay recessed in the rear panel  23 ( a ). Specifically, the recessed bay comprises an upper bay limit  25  and a lower bay limit  26 . The locking plate  40 , traveling between the two bay limits  25 ,  26 , is maneuvered into either the locked position or the unlocked position of the door guard assembly  2 . 
     In  FIG. 7 , it is to be noted that the compartment  10  of the door guard assembly  2  has been placed into the unlocked configuration, with the locking plate  40  resting upon the lower bay limit  26 . The two pairs of left-side and right-side plate fasteners  37  of the locking plate  40  are constructed such that each pair extends through the width of the locking plate  40  and terminate flush with the surface of the rear panel  23 ( a ). Each of the four plate fasteners  37  has cylindrical axles which axles travel up and down within a left slot  48  and a right slot  49 , respectively. This vertical movement of the locking plate  40  from upper bay limit  25  to lower bay limit  26  translates into either a locked configuration or an unlocked configuration of the door guard assembly  2 . 
     Further shown in  FIG. 7  is a partial view of the inner drum  51  of the mortise cylinder  50  and the platform  59  within which the inner drum  51  is enclosed. Importantly, it is also noted that the adjustably-sized channel  21  manifests an upper flange  18 , which works in conjunction with the lower flange  19 . The lower flange  19  is, in actuality, part of the horizontal structure of the locking plate  40 . 
     In reiterating the functions of the door guard assembly,  2  the mainspring  32  when freed, rapidly pulls the U-bracket  41 , (permanently connected to the locking plate  40 ) until the bottom of the locking plate  40  rests against the lower bay limit  26  (see  FIG. 7 ) of the rear panel face  23 ( a ) of the compartment  10 . This is the unlocked configuration of the door guard assembly  2 , corresponding to the configuration shown as in  FIG. 7 . As a direct result of the lowering (rendered by a user turning the control key  57  clockwise in the mortise cylinder  51 ) of the mutually-connected U-bracket  41  and locking plate  40 , there is created a lengthened opening in the adjustably-sized channel  27  of the rear panel  23 . 
     The lengthened adjustably-sized channel  27  then presents sufficient space to allow a user to lift the adjustably-sized channel  27  from its forced clamping of the upper notch  71  and lower notch  72  of the modified strike plate  70 . The removal is accomplished by the user lifting the compartment  10  upwards, which then allows both the upper flange  18  of the rear panel face  23 ( a ) and the lower flange  19  of the locking plate  40  of the compartment  10  to clear their former connections with the upper notch  71  and lower notch  72 , respectively, of the modified strike plate  70 . 
     Upon removal of the compartment  10  of the door guard assembly  2  from the modified strike plate  70 , the user may then stow the door guard assembly  2  in a convenient or private location, with the control key  57  remaining immovable from its position within the keyway  58 . The door guard assembly  2  when stowed, may be hung onto a specially-constructed, compatible door guard rack  69 . By design, the control key  57  cannot be removed from the keyway  58  unless the control key  57  is turned clockwise so as to place the locking plate  40  into the locked configuration. Once that is accomplished, the control key  57  is removable. 
     The rear face  23 ( a ) of the vertical panel  23 , when operationally locked, simultaneously abuts the door jamb  62  and, door interior surface  67  (more clearly shown in  FIG 1  and  FIG. 2(B) . In  FIG. 7 , other prominent items illustrated include an open channel  27  which terminates at its top end at an upper flange  18 , and at its lower end in a lower flange  19 , which is integral to a locking plate  40 . Additionally visible is a portion of the mortise cylinder  51 , partially showing the platform  59  upon which the mortise cylinder  51  is mounted. 
     As pointed out earlier, the range of travel of the locking plate  40 , at its upward limit, causes reduction of the open channel  27  to a minimum vertical length dimension. This minimum length dimension, when coordinated with placement of the adjustably-sized channel  27  upon the strike plate  70  corresponds to attainment of the locked configuration of the Door Security Kit  1 . 
     In the preferred embodiment, four plate fasteners  37 , are permanently fastened to the lock plate  40  and in conjunction each having a through-rod  38  which passes through either a left slot  48  or a right slot  49 , continuing on to form a permanent bond to the U-bracket  41  (not shown) in the interior of the compartment  10 . Minimally visible in  FIG. 7  are the left sidewall  21 , right sidewall  22 , vertical panel bottom  23 ( c ) and vertical panel top  23 ( b ), along with the cover top edge  15 . 
       FIG. 8  presents a side view of the door guard assembly  2  in accordance with section line  8 - 8  of  FIG. 7 , after removal of the cover  11 . Further shown are the U-bracket  41 , fork  43 , ledge  42 , lock-arm  44 , post  38 , and, the mainspring  32 . Also indicated in  FIG. 8  is the upper bay limit  25  and lower bay limit  26 , which regulate vertical travel of the locking plate  40 . The lock-arm  44  is shown to be retained by the fork  43 , and fork opening  47 , while the mainspring  32  is in a relaxed state, rendered by the unlocked condition of the door guard assembly  2 . Two of the tabs  30  for attachment of the cover  11  are shown. A restraining spring  35  for allowing cushioned movement of the base of the lock-arm  44  is also shown. 
       FIG. 9  depicts a downward-looking view, or plan view, of  FIG. 8 . Shown are the fastening tabs  30 , U-bracket  41 , fork  43 , ledge  42 , lock-arm  44 , fork opening  47 , post  38 , and the outline of the adjustably-sized channel  27 . 
       FIG. 10  is the profile view of the modified strike plate  70  as seen looking vertically downward, and further illustrating the modified strike plate  70 , relative to its attachment to a door jamb  62 .  FIG. 11  presents a linear view of the modified strike plate  70 , including the bolt-hole  75 , top notch  71 , and bottom notch  72 . It is to be noted that the rectangular shape of each the top notch  71  and bottom notch  72  features two shoulders and an inner, cut-out depth. 
     In summary, under extreme circumstances, where security and protection from the possible breaking of the door lock of a door  60  is necessary for human safety, the Door Security Kit  1  will provide crucial fortification. A user must first access the door guard assembly  2  from its previously stowed location, and ensure that the door guard assembly  2  is in the unlocked configuration. The user next places the adjustably-sized channel  27  of the Door Security  1  directly onto the strike plate  70  in the door jamb  62 , then turn the control key  57  clockwise to ensure fortified security of a door. 
     While preferred embodiments of the present inventive method have been shown and disclosed herein, it will be obvious to those persons skilled in the art that such embodiments are presented by way of example only, and not as a limitation to the scope of the inventive concept. Numerous variations, changes, and substitutions may occur or be suggested to those skilled in the art without departing from the intent, scope, and totality of this inventive concept. Such variations, changes, and substitutions may involve other features which are already known per se and which may be used instead of, in combination with, or in addition to features already disclosed herein. Accordingly, it is intended that this inventive concept be inclusive of such variations, changes, and substitutions, as described by the scope of the claims presented herein.