Abstract: An improved latch guarded door lock and frame system is provided. A recessed surface is provided in a hollow metal frame, and is dimensioned to accommodate a latch guard so that the external surfaces of the door, frame and latch guard are flush. The recessed surface of the frame behind the latch guard is further reinforced by employing a thicker wall than is used in the rest of the frame, and by welding a square metal tube into the recessed region. A medial metal support is also welded into the lock box cavity in order to prevent the lock box from collapsing under stress. The resulting door lock and frame system is less penetrable than prior systems, and provides greater security because the latch guard is less vulnerable to prying and because the frame and lock box are reinforced, thus less likely to collapse under stress.

Abstract: An interlocking latch guard for obstructing and resisting the unauthorized opening of an inwardly opening locked door comprises a frame channel mountable on the outside surface of a door frame, and a door channel mountable on the outside surface of a door. The frame channel has a pair of spaced-apart, parallel side flanges, and a front flange directed perpendicularly to the side flanges such that the frame channel has a generally U-shaped cross-section. The door channel includes at least one interlocking flange, and a back flange directed perpendicularly to the interlocking flange. When the door is closed and locked, and the channels are appropriately mounted by fasteners, the interlocking flange of the door channel protrudes substantially parallel to and in between the side flanges of the frame channel, thereby restricting or blocking access to the fasteners.

Abstract: A simple, inexpensive and effective apparatus and method for strengthening a door frame or similar structure to make the frame less susceptible to being broken when the door is subjected to a violent blow or kick. According to the invention, a fastener is disposed through the doorjamb on each side of the bore that is formed in the facing surface of the doorjamb for receiving the bolt of a deadbolt lock or other latching device. The fasteners are disposed through the doorjamb in bores formed generally perpendicular to the edges of the doorjamb and parallel to the plane formed by the facing surface of the doorjamb. A rigid member connects the fasteners on the inside edge of the doorjamb to provide increased strength to the section of the doorjamb located adjacent to the deadbolt.

Abstract: A security device designed for protecting the shackle of a disk shaped padlock when mounted on a door of a container which consists of a housing for an armor protected latch bar which housing defines a recess providing access to an aperture in the bar by a circular shackle of the padlock. The recess also encases most of its housing exposing only the key tumbler of the lock which if tampered with will not cause movement of its concealed circular shackle. The latch bar is at least partially covered with a high carbon steel at the point it extends into an associated keeper.

Abstract: Door Guards are shielded from outside access with hand tools while in the open guarded position. The shields close off the opening space between the door and the jam and can be shaped to provide no leverage positions or grasping surfaces which can be used for destruction and release of the guard or opening of the door.

Abstract: A door secured system includes a door reinforcing rigid metal member (20) across the width of a presently installed door or imbedded within the construction of a new door (20a) to prevent the breaking in of the center of th edoor (panel, rails, etc.) having an L-shaped end at the strike area (24) to strength the lock and strike area. On a presently installed door, fingers (26, 26a & 26b) at the hinge side of the reinforcing rigid metal member (20) with a special hinge (28 and 30) and pin (27) combination five added strength to the hinge system. This also allows easy removal on special occasions. The reinforcing rigid metal member (20a) within the construction of a new door has an L-shaped end (62) for securely attaching a hinge plate (not shown), giving added strength to the hinge side of the door. The rigid metal member (20+20a) has an opening (22) to encompass a cylindrical door lock assembly (46) or dead bolt lock assembly (44). These systems give the same security when in or away from the dwelling.

Abstract: An antiprying member is secured onto a metal frame adjacent a protective flap member secured onto a security door that is hingedly mounted onto the metal frame. The antiprying member extends along the free end of the flap member and has a thickness at least the same as that of the flap member and is spaced from the flap member no greater than the thickness of the flap member to prevent a prying member from bending the flap member away from the metal frame or to pry open the security door. A pin having an annular notch is secured to the flap member and extends through a hole in the door frame to prevent the door frame from being pried or twisted away from the door.

Abstract: A striker plate assembly having a striker plate attachable to a door jamb and provided with a curved impact segment projecting forwardly of the jamb and a central opening for insertably receiving a sliding bolt. The striker plate further includes a mounting flange normal to the plate with securement slots and a pair of apertures located at the joint of the flange and the plate. A pair of adjustment plates form fit to a jamb shoulder and include spikes for penetrating the jamb and jamb shoulder for securement of the assembly. Recessed fastener openings are provided in the plates for positive fastening of the plates to the door jamb. The adjustment plates include angular cross-over slots for fastening adjustment to the width of the jamb shoulder.

Abstract: A lock device for locking a detachable roof to a car body, which a housing mounted to the detachable roof, the housing defining a certain clearance through which the interior of the housing is exposed to the outside of the housing; a handle lever including a base portion pivotally arranged in the housing and a grip portion projected into the outside of the housing, the base portion being formed with a curved guide slot which has at least a locking part; a lock member linked to the handle lever in such a manner that, when the handle lever is pivoted to a lock position, the lock member becomes operative and, when the handle lever is pivoted to an unlock position, the lock member becomes inoperative; a guide pin movably received in the housing and slidably engaged with the curved guide slot of the handle lever, the guide pin suppressing the handle lever from pivoting from the lock position toward the unlock position when received in the locking part of the guide slot; a slide member incorporated with the guide p

Abstract: A lock-keeper security shield plate assembly arranged over the usual lock-keeper plate which is in a routed recess of the wooden door jamb lock rail. The reinforcing shield plate is zig-zag shaped having an upset center section and two integrally formed angle face plates, shaped for one said shape to fit all width door frames with door stop rails that also vary in face width. One said face plate defines a bolt opening that is to be aligned with a bolt aperture of an underlying lock-keeper plate of a dead bolt mechanism, the other face plate defines a screw aperture in a key location in relation to a tubular dead bolt lock cylinder assembly mounted on a said door that virtually prevents tampering with the elongated anchor screw driven through said screw hole, through face of stop rail of wood jamb and framing studs there behind, said location of anchor screw in space relation to said lock cylinder rim prevents the removal of said anchor screw (door closed).

Abstract: A combined lock device comprised of a key lock linked up with at least one combination lock. The key lock can be unlocked by a key only when the combination lock is unlocked. A division plate is mounted on the lock device to alternatively conceal the key lock and the at least one combination lock, so as to prohibit the key lock and the at least one combination lock from being simultaneously exposed to thieves' eyes. The lock bolt which is driven by the key to fasten a door, strongbox, etc. has a notch on the slope of the front end thereof to protect against insertion of a pry.

Abstract: An assembly for improving closed door security comprises a door having a unitary first member comprising a first elongated flat plate portion lying substantially entirely in a first plane and a first elongated flat blade portion lying substantially entirely in a second plane, the planes being parallel with the end face of said door, the unitary member secured on the door with the blade portion spanning the latch bolt and extending parallel along the end face substantially entirely between the latch bolt and the outside door edge,a doorjamb having a unitary second member comprising a second elongated flat plate portion and having an opening exposing a latch bolt recess, and lying substantially entirely in a third plane and a second elongated flat blade portion lying substantially entirely in a fourth plane the third and fourth planes being substantially parallel with each other and with the first and said second planes, the second plate and second blade portions having an elongated slot therebetween,and wherei

Abstract: A strengthening device for use with a deadbolt lock and includes a planar metal anchor plate having a hole with an anchor pocket welded to the plate at the hole. The anchor plate is installed between the door jamb and the framing or door stud. The anchor pocket extends into the hole in the door jamb through which the deadbolt is insertible. When the deadbolt is installed in the door, the bolt will extend into the anchor plate. In another embodiment, a metal bolt guide is inserted from the outer side of the door jamb into the anchor pocket.

Abstract: A security device for a door frame for a fastening in a cavity a door frame cavity behind a strike plate. The device comprises a short length of flat bar to be fastened directly to an internal portion of a door frame at the height of a latch bolt receptacle so that a relatively large area of a surface of the bar provides a solid buttress support contact for the latch bolt when in the latch bolt receptacle, the bar thereby serving as a high strength, adjustable latch bolt keeper. Fasteners and holes in the bar provides for connections to the door frame, the cover-plate-and-strike, and to a safety chain as may be required.

Abstract: A strike plate support used in conjunction with a strike plate and a latch bolt or dead bolt. The strike plate for receiving the latch bolt or deadbolt is fastened to the strike plate support which has a portion that is fastened to the back surface of the door jamb. An improvement in door security strength is realized as the strike plate support will prevent breaking of the door jamb caused by sudden concentrated force exerted to the door by unwanted intruders. Optionally, the strike plate support in addition to being fixed to the door jamb can also be secured to the framing lumber for enhanced strength.

Abstract: An anti-theft guard for a wing window latch includes a hollow tubular sleeve and an anchoring element for releasably attaching the sleeve to the latch body. The sleeve is insertable at one open end over the latch body, and is of sufficient length to extend beyond the body and surround and shield a safety push button thereon from access except through an opposite open end of the sleeve. The sleeve has a longitudinal slot defined in a side portion extending from the one open end toward the opposite open but terminating short thereof. The slot has an outer portion located adjacent the one open end of the sleeve and an inner portion located remote therefrom and wider than the outer portion.

Abstract: A strike plate for an entry door structure. The strike plate consists of a unitary metal member having a face portion which merges into a curved lip portion which merges into a lateral flange oriented perpendicularly to the face portion. The face portion has an upper and lower edge defining the vertical dimension thereof and a recess for receiving an outwardly-biased latch member of a door, and has mounting holes for screw members to fix the face portion on the face surface of a jamb of a frame for an entry door structure. The lateral flange has upper and lower edges defining the vertical dimension thereof. The vertical dimension of the flange is greater than the vertical dimension of the face portion. The lateral flange has mounting holes extending therethrough exclusively at locations more spaced apart vertically than the mounting holes through the face portion.

Abstract: The present invention provides a cover for use in a vehicle such as an automobile for covering door operating elements thereby concealing them from children. The cover is in the form of a rectangular box-like housing which is placed over any upwardly projecting elements such as a locking button, the housing having a bowed front flange which hides such elements as a latching handle on the inside of the door. A rear flange can be inserted between the window and the lower door portion to retain the cover in position.

Abstract: A door lock has an open lever linked with an open rod and pivotally mounted on a base plate and a locking lever linked with a locking link and pivotally mounted on a sub plate, the open lever and the locking lever being linked with each other through a locking rod so that a door is selectively locked and unlocked by the pivotal motion of the open lever which is caused by the pivotal motion of the locking lever. The door lock further has a protective wall in the shape of an upright wall which is formed integral with the side surface of the open lever which faces the locking lever. Since the protective wall which is formed integral with the open lever functions as a protective means, it is possible to reduce the number of parts and the number of man-hours needed for the assembling operation and further use the door lock in common to all types of vehicle.

Abstract: A safety door latch is provided for a door hinged to a door frame in a building having a first and second floor. The door latch is spring biased closed to keep the door in a secured locked position and can be manually released to unlock the door from the first and second floors.

Abstract: A strengthening device for use with a deadbolt lock and includes a planar metal anchor plate having a hole with an anchor pocket welded to the plate at the hole. The anchor plate is installed between the door jamb and the framing or door stud. The anchor pocket extends into the hole in the door jamb through which the deadbolt is insertible. When the deadbolt is installed in the door, the bolt will extend into the anchor plate. In another embodiment, a metal bolt guide is inserted from the outer side of the door jamb into the anchor pocket.

Abstract: A door security assembly comprises first and second unitary members for being secured in a door and doorjamb frame, respectively, each member comprising a flat planar plate, a flat coplanar blade and a slot therebetween, with each blade received in the slot of the other member when the door is closed.

Abstract: Disclosed is an improvement in the lock mechanism described in U.S. Pat. No. 3,073,143. The improvement comprises barrier walls on the bolt which prevent a shim-type pick device from opening the lock mechanism. The barrier walls are positioned to prevent the pick device from tripping the locking member which locks the deadlock actuator in the locked position.

Abstract: An improved latch plate in combination with an anchor base plate designed to resist forceable entry when disposed within a doorjamb. The construction of said latch may be adapted to engage either a sliding bolt or dead bolt when disposed over the bolt recess of a doorjamb. The latch has a flat plate portion with a large opening to receive a bolt, the flat plate has anchor corner and lip end, with an anchor stem extending inwardly towards the doorjamb and perpendicularly from the inside of the flat plate at the anchor corner. The anchor stem is in bearing contact within the doorjamb recess of the door frame and protrudes through a longitudinal aperture located in the anchor base plate into the doorjamb frame. The anchor base has a plurality of apertures disposed on both sides of the longitudinal aperture and are so located to cooperately receive the screws from the latch plate.

Abstract: A security device provided for use in a door frame assembly has a door jamb disposed in surrounding relation to a door. The security device is comprised of an elongated, rigid plate inserted into a slot and firmly anchored in place in the door jamb in spaced parallel relation to the free vertical edge of the door. The plate has an opening aligned with an opening in the door jamb, and the spacing between the plate and face of the door jamb is such that a deadbolt on the door will project through the aligned openings in the door jamb and plate.

Abstract: There is disclosed an improved handle lock assembly of the type generally including a handle lock barrel reciprocally carried relative to a lock stud, the lock stud having an interiorly threaded end for threadedly engaging a fixed stud aperture, the handle lock barrel and lock stud being carried within the confines of a fixed lock guide formed integrally with a handle flange including a handle recess into which the handle may be lockingly secured by a lock provided in the handle and having a bolt for securing the handle lock barrel to the lock guide against a bolt shoulder provided in the handle flange, the improvement consisting of bolt guide shield means carried on the lock guide and extending for a distance down the length of said lock guide, the bolt guide shield means encircling and completely enclosing the lock guide in a manner sufficient to prevent access to the bolt securing the handle lock relative to the handle flange when in the locked position, the bolt guide shield means formed integrally with t

Abstract: A guard plate is used to protect a door from forced entry where the door is used in conjunction with a doorjamb. The door has a lock cylinder in it, and this cylinder is operatively interconnected with a reciprocal bolt for entering an opening in the doorjamb in a conventional manner. The guard plate has first and second interconnected sections. An opening is provided through the first section for accommodating the portion of the lock cylinder which normally is exposed on the surface of the door in which the cylinder is mounted. The first section of the plate then is secured to the door, with the lock cylinder aligned with the opening in the first section. The second section also has an opening through it, and the two sections are interconnected together with a bridge. The bridge causes the second section of the plate to overlie the doorjamb when the door is closed, and the bridge itself overlies the space between the door and the doorjamb when the door is in its closed position.

Abstract: A door guard to deter unauthorized entry that includes a pair of complimentary structural members having complimentary cross-sectional configurations to define interlocking portions that will engage to secure the free end of the door to the adjacent door frame. One of the complementary members is secured along the free end of the door and the other member is secured to the adjacent door jamb or frame. The arrangement is such that any effort to force the door as with a prying tool, will cause the interlocking portions to engage and thereby prohibit the door from being force opened. In another form of the invention, the complementary members are arranged and constructed to deter the forcing of the door latch.

Abstract: The invention comprises a combination security plate for attachment to a door edge over or in conjunction with a latch set, the security plate providing protection against incursion of a credit card or other light burglary tool directed to the latch or to destruction of the latch area of the door or door stop. The combinational aspect of the design of the invention acts to protect both sides of a door so can thus be utilized on an outwardly or inwardly opening door. The security plate of the invention may be also be attached to either a left or right opening door without modification and in combination with the use on inward and outward opening applications. In those applications where only one side of the door needs protection, the plate may be easily broken into two parts so that each part may be used, respectively, on an inward and an outward opening door.

Abstract: A security striker plate for a lock assembly upon a door hinged within a door jamb including a peripheral door stop and interior framing studs comprises a unit body of U-shape including spaced inner and outer mount plates snugly positioned upon the studs and apertured for nailing thereto. A right angular apertured strike plate extends from the inner mount plate, faces the door when closed and terminates in a right angular door stop lip nested within the door stop and door jamb. An anchor plate extends from the lip underlies the door jamb, is retained thereby and is connected to the outer mount plate.

Abstract: Lock for overhead doors an similar. The lock comprises a stationary part in the form of a lock housing (10) having a tubular lock sleeve (17) which is parallel with the direction of movement of the door, and a movable part which comprises a lock plunger (13) arranged to enter into the lock sleeve when the door is closed, and in the lock housing a lock latch (10) arranged to be brought into engagement with the plunger and to prevent the extraction of the plunger from the lock sleeve.

Abstract: An aerial terminal for telecommunication cables characterized by its construction which includes a substantially weathertight chamber for receiving a segment of the telecommunication cable and permitting individual wire pairs to be separated therefrom. This chamber is known as the splicing housing. The aerial terminal further includes a terminal housing which communicates with the splicing housing so that individual wire pairs may be operatively connected to a telecommunication terminal block for ultimate connection to individual subscriber lines. In addition to the general construction of the aerial terminal for ease of installation and access for the purpose of connecting individual subscriber lines to the telecommunication cable, the aerial terminal includes unique sealing sleeves for protecting the cable most effectively from adverse weather conditions. Unique locks are also disclosed for preventing unauthorized entry into the aerial terminal.

Abstract: A security striker plate mounted with the rail of a door frame which includes a peripheral door stop and interior framing studs. The striker plate comprises a mount plate inset within the rail against an inner surface and secured thereto by a plurality first wood screws extending into the studs. A right angular apertured strike plate bears against a right angular surface of the rail and is secured thereto by a plurality of spaced second screws which extend into the studs. A right angular door stop lip extends from the strike plate to reinforce the door stop and a right angular anchor plate extends from the lip and bears against outer portions of the rail and is secured thereto by a plurality of tamper proof security screws which extend into the studs. The hook plate is secured to the studs and has apertures therethrough to supportively receive the second and third screws.

Abstract: A generally U-shaped protective door shield that engages the swingable edge of a door defines a bolt opening that is to be aligned with a bolt aperture of an underlying face plate of a bolt or lock mechanism. Common anchoring screws are driven through the shield and the face plate into the door, forming a single integral structure of increased strength and insuring proper alignment. Preferably the face plate has recessed screw holes that receive lips on the shield. These lips may be deformed into the recesses by the anchoring screws.

Abstract: A door jamb support includes an L-shaped reinforcing plate having a recessed portion with an opening therethrough positioned to be in alignment with a door latch on a door, a strike plate positionable within the recessed portion having an opening therethrough in alignment with the opening in the reinforcing support plate, an adjustment mechanism for adjusting the position of the strike plate on the support plate to vary the location of the strike plate opening with respect to the support plate opening, the fasteners for mounting the strike plate on the support plate. The adjustment mechanism includes a series of spaced projections on the strike plate above and below the strike plate opening and a corresponding series of spaced indentations on the support plate above and below the support plate opening. The adjustment feature enables the reinforcing support plate to accommodate variances in the design of and in the position of door handle latches in doors.

Abstract: The invention comprises a combination security plate for attachment to a door edge over or in conjunction with a latch set, the security plate providing protection against incursion of a credit card or other light burglary tool directed to the latch or to destruction of the latch area of the door or door stop. The combinational aspect of the design of the invention acts to protect both sides of a door so can thus be utilized on an outwardly or inwardly opening door. The security plate of the invention may be also be attached to either a left or right opening door without modification and in combination with the use on inward and outward opening applications. In those applications where only one side of the door needs protection, the plate may be easily broken into two parts so that each part may be used, respectively, on an inward and an outward opening door.

Abstract: A motor vehicle theft deterring device designed to prevent access to the levers which control the operating of the door lock in a vehicle door. A cover strip of rigid material of predetermined length and width to substantially cover the space between the vehicle window glass and the outside panel of the vehicle door is formed with a downwardly extending support strip and a mounting plate at a right angle to one edge of the cover strip, the plate being attached to the sash of the automobile window to prevent the insertion of a rod or similar device to release the lock actuating levers in the vehicle door. In a modified form of the invention, an electrical switch is positioned in the mounting plate and is electrically connected to the horn relay to cause the horn to blow continuously in the lock cover is tampered with and the horn circuit is grounded by movement of the switch.

Abstract: Pilferage deterrent device for box car, container or trailer doors of the type in which the device is toward the top of the door out of reach of a person standing on the ground, and only accessible to release the latch from the top, by a person standing on a loading dock or elevated platform. The latch cooperates with a keeper and both the keeper and latch are enclosed so access cannot be had to the latch to release the latch by a pole or elongated tool.A pivoted release member termed a trigger extends above a housing for the latch and is transversely pivoted to the housing and protected by the housing to prevent access to said release member from the ground. The release member has camming engagement with the latch and is operable by hand to cam the latch out of engagement with the keeper and accommodate opening of the door.

Abstract: A lever for controlling a lock of an automobile door is mounted on the door and projects from the door. A shield is fixed to the door, and lies parallel to and inward of the lever so that the lever lies behind the shield as seen from the automobile passenger compartment. The shield extends forward of the free end of the lever to prevent access to the control lever when the door is in its closed position.

Abstract: The invention comprises a design improvement on security plates of the type which are designed to prevent unauthorized entry through a door equipped with a door latch set by means of the use of a credit card or the like. The improvement provides a single security plate equipped with a double ended design which provides for installation on either in inward swinging or an outward swinging door.

Abstract: A gate locking system for securely locking a rolling type gate in a closed position within an opposing pair of U-shaped channel guide rails. The guide rails include aligned apertures formed through opposing front and rear walls. The gate also includes an aperture which is aligned with the guide rail apertures when the gate is in the closed position. A guard plate is positioned exteriorly of the guide rails and also includes an aligned aperture. An elongated member of a lock is inserted through the various apertures to lock the members together in the closed position. The head of the lock is retained exteriorly of the guard plate while the distal end of the lock extends beyond the rear wall of the guide rail. A securing member cooperates with an extended end of the elongated lock member to retain the lock in a clamped position between the opposing walls of the guide rail so that the closed gate is captured therebetween. The securing member is under the operative control of a rotatable portion of the lock.

Abstract: An improved strike plate for mounting on a door jamb to receive the dead bolt of a door mounted lock wherein the strike plate is provided with a buck pin that is offset from the bolt receiving aperture of the plate so as to be insertable in an opening provided in the strongest part of the wall supporting structure. A hinge similarly constructed is also disclosed.

Abstract: A latch security kit comprising a pair of templates for positioning at predetermined positions respectively on a door and door jamb adjacent the door latch and staple, the templates indicating the positioning of studs to be affixed to the door and door jamb so that the studs will be mutually interspersed when the door is closed onto the jamb, and a set of studs to be inserted in the position defined by the templates.

Abstract: A door locking device having a high anti-theft performance is herein disclosed. The device comprises a catching device mounted in the door and including a hook member and a lever member, the hook member being locked when the lever member is moved in a direction and unlocked when the lever is moved in an opposite direction; a key cylinder rotatably mounted to the door, the key cylinder being rotatable about the axis thereof only when handled by a specified key; an arm securely connected to an end of the key cylinder and extending therefrom radially outwardly; a rod pivotally connected to the arm and extending therefrom toward the lever member, so that rotation of the key cylinder about the axis thereof induces an axial movement of the rod; and a play providing device interposed between the extending end of the rod and the lever member, so that a play is permitted between the rod and the lever member upon relative movement therebetween.

Abstract: A guard for protecting the cylinder of a door lock from removal comprises a substantially rectangular plate having a first portion including a section adapted to fit over the lock cylinder and a second portion offset from the first portion, the second portion traversing the gap between the door and the doorjamb for protecting the bolt.

Abstract: A security plate for entrance doors adapted to be secured by tamper resistant fasteners to the stop member of a door frame. The plate is elongated to extend above and below the lock area of the door. The plate has a relatively thick flat edge that abuts a closed door and the plate is formed with a concave portion adajcent the thick edge and connected thereto by a smooth tool-deflecting ramp.

Abstract: A panic exit door actuator and locking bolt mechanism of the rim type adapted for mounting in a horizontal position extending generally between the hinged edge and swingable edge of an exit door, wherein the locking bolt comprises a rotatable star wheel with a plurality of circumferentially spaced radial arms that are successively movable by rotation of the star wheel in one direction into salient bolted positions in which they are retained against reverse rotation to an unbolted position by a spring biased latch. The plane of rotation of the star wheel is traversed by the path of relative movement of a bar type strike mounted on the associated door frame, during closing movement of the door, whereupon the strike will engage one of the arms and rotate the star wheel to bring a following arm into a latched, bolted position overlying the strike.

Abstract: A door jamb reinforcer is disclosed which comprises at least one, and preferably two or more, reinforcing rods which are positioned internally along the depth of a door jamb adjacent the area of the bolt receiver or striker plate. The rods are used in conjunction with a brace bar which is positioned adjacent the striker plate, and extends above and below it on the edge of the door jamb. With the use of the bar and reinforcing rods of this invention, a door jamb's shear and tensile strength is increased to prevent the jamb from being splintered and broken during a potential forced entry.

Abstract: A reinforcing structure for an associated door and lock mechanism of a type having a bolt. The door abuts an elongated door stop carried on a door jamb in the closed position. A strike plate has a bolt receiving aperture therein and is dimensioned and configured to have at least portions extending into recesses in the associated elongated door stop. Screws extend through the portions for mounting the strike plate on the associated door jamb. A jamb plate is dimensioned and configured for mounting on the door stop with a first edge thereof in generally parallel relationship to a side of the strike plate and extending substantially to an edge of the door stop which abuts the associated door when in the closed position. In some forms of the invention a first reinforcement plate is disposed on at least one side of the door, surrounding means for operating the bolt, and is dimensioned and configured for extending into the recess in the jamb plate.

Abstract: A latch and lock guard for doors which comprises a pair of similar elongated bars of sufficient width and thickness for purposes of rigidity. Each bar has a flat base and a series of uniform, regularly spaced teeth extending integrally from the bar sideways along one edge. The width of the spaces between the teeth is slightly greater than the width of the teeth. Means are provided to secure solidly one bar to the external side of a door over the lock area, with its teeth pointing towards the adjacent door edge, and to secure solidly the other bar to the door jamb with its teeth pointing towards the door edge, the teeth of one bar fitting within the slots between the teeth of the other, and vice versa, in interlocking fashion when the door is in closed position.