CA1223617A - Security device for doors and jambs - Google Patents
Security device for doors and jambsInfo
- Publication number
- CA1223617A CA1223617A CA000422854A CA422854A CA1223617A CA 1223617 A CA1223617 A CA 1223617A CA 000422854 A CA000422854 A CA 000422854A CA 422854 A CA422854 A CA 422854A CA 1223617 A CA1223617 A CA 1223617A
- Authority
- CA
- Canada
- Prior art keywords
- door
- holes
- frame
- plate member
- door frame
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
Classifications
-
- E—FIXED CONSTRUCTIONS
- E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
- E05B—LOCKS; ACCESSORIES THEREFOR; HANDCUFFS
- E05B17/00—Accessories in connection with locks
- E05B17/20—Means independent of the locking mechanism for preventing unauthorised opening, e.g. for securing the bolt in the fastening position
- E05B17/2084—Means to prevent forced opening by attack, tampering or jimmying
Landscapes
- Door And Window Frames Mounted To Openings (AREA)
Abstract
Abstract:
A guard means is described for securing a door locked to a door frame by a dead bolt to prevent forceable entry, the dead bolt being mounted in the door for projection from the door edge and being adapted to lock the door by projecting through a hole in a strike plate mounted on the door frame and into a bolt tunnel extending into the door frame. The novel guard means includes a frame guard having a first plate member for the outside of the door frame, this first plate member having a pair of spaced threaded sleeves projecting from the inner face thereof and adapted to enter into holes extending through the door frame above and below the bolt tunnel perpendicular to the axis thereof. A second plate member having a pair of spaced holes is provided for the inside of the door frame.
Bolts are passed through the second plate member holes, through the frame holes and into the threaded sleeves and serve to firmly clamp the frame between the first and second plate members. A similar pair of plates are pro-vided on the door mounted by way of holes extending through the door above and below the dead bolt. This combination of plates around the dead bolt in the door and the bolt tunnel in the door frame make forced entry almost impossible.
A guard means is described for securing a door locked to a door frame by a dead bolt to prevent forceable entry, the dead bolt being mounted in the door for projection from the door edge and being adapted to lock the door by projecting through a hole in a strike plate mounted on the door frame and into a bolt tunnel extending into the door frame. The novel guard means includes a frame guard having a first plate member for the outside of the door frame, this first plate member having a pair of spaced threaded sleeves projecting from the inner face thereof and adapted to enter into holes extending through the door frame above and below the bolt tunnel perpendicular to the axis thereof. A second plate member having a pair of spaced holes is provided for the inside of the door frame.
Bolts are passed through the second plate member holes, through the frame holes and into the threaded sleeves and serve to firmly clamp the frame between the first and second plate members. A similar pair of plates are pro-vided on the door mounted by way of holes extending through the door above and below the dead bolt. This combination of plates around the dead bolt in the door and the bolt tunnel in the door frame make forced entry almost impossible.
Description
~36~7 jambs This invention relates to an improved security device for dooxs and jambs andl more particularly, to a guard means for preventing the forceable opening of a door locked by a dead bolt.
Home security i~ more and more becoming a serious problem. It is well known by security specialists that the conventional lock means provided to lock a door can be easily opened for illegal entry without the use of a key.
For instanGe, a thin bar can be inserted into the space between the door and the door frame to force the door away from the frame a sufficient amount to allow the latch to clear the strike plate recess by which the lock latch is retained. An example of such an arrangement is shown in Fabrici, U.S. Patent 3,888,530, issued June 10, 1975, which used a cladding arrangement to try to make the insertion of pry bars more difficult. Particularly where the door frame is made of wood 9 an intruder using a crowbar inserted between the door and the frame may use sufficient force to destructively break away part of the frame to release the lock~ This is particularly true in khe case where a door has been locked by a dead bolt which projects a substantial distance into a bolt tunnel in the door frame. In other words, the dead bolt is e~fective in preventing the use of a crowbar to orce the door away from the frame sufficient to allow the latch to clear the . ,
Home security i~ more and more becoming a serious problem. It is well known by security specialists that the conventional lock means provided to lock a door can be easily opened for illegal entry without the use of a key.
For instanGe, a thin bar can be inserted into the space between the door and the door frame to force the door away from the frame a sufficient amount to allow the latch to clear the strike plate recess by which the lock latch is retained. An example of such an arrangement is shown in Fabrici, U.S. Patent 3,888,530, issued June 10, 1975, which used a cladding arrangement to try to make the insertion of pry bars more difficult. Particularly where the door frame is made of wood 9 an intruder using a crowbar inserted between the door and the frame may use sufficient force to destructively break away part of the frame to release the lock~ This is particularly true in khe case where a door has been locked by a dead bolt which projects a substantial distance into a bolt tunnel in the door frame. In other words, the dead bolt is e~fective in preventing the use of a crowbar to orce the door away from the frame sufficient to allow the latch to clear the . ,
- 2 -strike plate, but the dead bolt does not solve the problem of the des~ructive use of a crowbar~
It is the object of the present invention to provide a reinforcing means which will particularly protect doors locked by dead bolts against destructive entry.
Summary of the Invention ___ The present invention provides a guard means for secur--ing a door locked to a door frame by a dead bolt to prevent forceable entry, the dead bolt being mounted in the door for projection from the door edge and being adapted to lock the door by projecting through a hole in a str.ike plate mounted on the door frame and into a bolt tunnel extending into the door frame. The novel guard means comprises (a) a frame guard including a first plate member for the out-side of the door frame, said first plate member having apair of spaced threaded sleeves projecting from the inner face thereof and adapted to enter into holes extending ~hrough the door frame above and below the bolt tunnel and perpendicular to the axis thereof, a second plate me~ber for the inside of the door frame having a pair of spaced holes and a pair of threaded fasteners adapted to pass through the second plate member holes, through the frame holes and into said threaded sleeves to firmly clamp the frame between the first and second plate members, and (b) a door guard including a first plate member for the outside of the door, said first plate member having a pair of spaced threaded sleeves projecting from the inner face thereof and adapted to enter into holes extending through the door above and below the bolt and perpendicular there--to, a second plate member for the inside of the door havinga pair of spaced holes and a pair of threaded fasteners adapted to pass through the second plate member holes, through the door holes and into said threaded sleeves to firmly clamp the door between the first and second plate members.
The security device of this invention is particularly \
~223~ 7 useful with modern dead bolt locks utill~lny ~ long bolt, e.g. one that penetrates at least one inch behind the strike plate. The security plates are made from a strong steel and the installation holes are placed preferably about three inches apart in both the door and in the frame The plates are very firmly tightened together by means of bolts and function as reinforcing brackets for the door and the frame. Thus, they prevent the weakest part of the door, namely the bolt tunnel, from giving or splitting, when the door is rammed from the outside and they also protect the weakest part of the door frame, again the bolt tunnel, from splitting away when excess force is applied to the door.
Other objects and advantages of my invention will become more apparent after a more careful study of the following detailed description which is to be read in combination with the accompanying drawings in which:
Figure 1 is a perspective view from the inside of a door and door frame with the security device of this invention installed;
Figure 2 is a perspective view of one of the reinforc-ing plates used;
Figure 3 is a view from the outside, of the security device as installed; and Figure 4 is a sectional view of the door frame with the security device installed.
With reference to the drawings illustrating the preferred embodiment of my invention, the numeral 10 designates a door jamb or frame mounted on a conventional
It is the object of the present invention to provide a reinforcing means which will particularly protect doors locked by dead bolts against destructive entry.
Summary of the Invention ___ The present invention provides a guard means for secur--ing a door locked to a door frame by a dead bolt to prevent forceable entry, the dead bolt being mounted in the door for projection from the door edge and being adapted to lock the door by projecting through a hole in a str.ike plate mounted on the door frame and into a bolt tunnel extending into the door frame. The novel guard means comprises (a) a frame guard including a first plate member for the out-side of the door frame, said first plate member having apair of spaced threaded sleeves projecting from the inner face thereof and adapted to enter into holes extending ~hrough the door frame above and below the bolt tunnel and perpendicular to the axis thereof, a second plate me~ber for the inside of the door frame having a pair of spaced holes and a pair of threaded fasteners adapted to pass through the second plate member holes, through the frame holes and into said threaded sleeves to firmly clamp the frame between the first and second plate members, and (b) a door guard including a first plate member for the outside of the door, said first plate member having a pair of spaced threaded sleeves projecting from the inner face thereof and adapted to enter into holes extending through the door above and below the bolt and perpendicular there--to, a second plate member for the inside of the door havinga pair of spaced holes and a pair of threaded fasteners adapted to pass through the second plate member holes, through the door holes and into said threaded sleeves to firmly clamp the door between the first and second plate members.
The security device of this invention is particularly \
~223~ 7 useful with modern dead bolt locks utill~lny ~ long bolt, e.g. one that penetrates at least one inch behind the strike plate. The security plates are made from a strong steel and the installation holes are placed preferably about three inches apart in both the door and in the frame The plates are very firmly tightened together by means of bolts and function as reinforcing brackets for the door and the frame. Thus, they prevent the weakest part of the door, namely the bolt tunnel, from giving or splitting, when the door is rammed from the outside and they also protect the weakest part of the door frame, again the bolt tunnel, from splitting away when excess force is applied to the door.
Other objects and advantages of my invention will become more apparent after a more careful study of the following detailed description which is to be read in combination with the accompanying drawings in which:
Figure 1 is a perspective view from the inside of a door and door frame with the security device of this invention installed;
Figure 2 is a perspective view of one of the reinforc-ing plates used;
Figure 3 is a view from the outside, of the security device as installed; and Figure 4 is a sectional view of the door frame with the security device installed.
With reference to the drawings illustrating the preferred embodiment of my invention, the numeral 10 designates a door jamb or frame mounted on a conventional
3~ wall framing which includes stud members 11, inner wall board 12 and two layers of outer sheathing 13 and 14. The complete door frame is finished by means of an inner trim piece 15 and an outer facing piece 16.
The door jamb 10 includes a recessed portion with a door stop 17 and in the recess portion is mounted a strike plate 22 over a deep bolt tunnel 31.
~2236~7 The door 23 is a typical solid panel door and includes a long dead bolt 24 designed to pass through the hole in strike plate 22 and into the bolt tunnel 31. The bolt 24 is actuated by a locking mechanism which includes an exterior key mechanism 25 and an interior handle 26. It will be readily evident from Figure 4 that inherent weak-nesses exist in both the door and door frame in the vicinity of the bolt tunnel 31 in the frame and the bolt 24 in the door.
The above weaknesses are overcome by the security device of this invention. Thus, one component is a steel plate 19 having projecting from one face thereof a pair of spaced internally threaded sleeves or sockets 20. These sleeves or sockets are typically welded to the plate 19.
A second plate 21 is provided having a pair of holes corresponding to the spacing of the sockets 20. This spacing is typically a~out three inches.
To install the security device of the invention in the door frame, a pair of parallel holes 18 are drilled t~rough the frame 10 as well as the trim piece 15 and the outside facing 16. These holes extend through the frame above and below the bolt tunnel 31 perpendicular to the axis thereof.
The sockets 20 and plate 19 are inserted into the holes in facing 16 and a pair of bolts 32, typically about 1/4" in diametar, are passed through ~he holes in plate 21 and the holes 18 into the sockets 20~ The bolts are tightened 50 that the plates 19 and 21 very firmly clamp the door frame therebetween.
The security device for the door is sim.ilar to the one used for the frame and includes an inner door plate 27 with a pair of spaced holes and an outer door plate 28 with a pair of spaced sleeves or sockets 29. These are installed in the same manner as the plates on the frame, by drilling holes thr~ugh the door perpendicular to the bolt 24 above and below the bolt tunnel and close to the edge of the door. Bolts 30 are then passed through the holes in the plate 27 and through the holes in the door " ~l2~3617 into the sockets 29. These bolts are firmly tightened to firmly clamp the door between the plates 27 and 28.
As will be seen from Figure 3, it i5 advantageous to engrave the word "security" on the exterior plates as a deterent to an intruder from bothering to try to forcibly and/or destructively open the door.
The door jamb 10 includes a recessed portion with a door stop 17 and in the recess portion is mounted a strike plate 22 over a deep bolt tunnel 31.
~2236~7 The door 23 is a typical solid panel door and includes a long dead bolt 24 designed to pass through the hole in strike plate 22 and into the bolt tunnel 31. The bolt 24 is actuated by a locking mechanism which includes an exterior key mechanism 25 and an interior handle 26. It will be readily evident from Figure 4 that inherent weak-nesses exist in both the door and door frame in the vicinity of the bolt tunnel 31 in the frame and the bolt 24 in the door.
The above weaknesses are overcome by the security device of this invention. Thus, one component is a steel plate 19 having projecting from one face thereof a pair of spaced internally threaded sleeves or sockets 20. These sleeves or sockets are typically welded to the plate 19.
A second plate 21 is provided having a pair of holes corresponding to the spacing of the sockets 20. This spacing is typically a~out three inches.
To install the security device of the invention in the door frame, a pair of parallel holes 18 are drilled t~rough the frame 10 as well as the trim piece 15 and the outside facing 16. These holes extend through the frame above and below the bolt tunnel 31 perpendicular to the axis thereof.
The sockets 20 and plate 19 are inserted into the holes in facing 16 and a pair of bolts 32, typically about 1/4" in diametar, are passed through ~he holes in plate 21 and the holes 18 into the sockets 20~ The bolts are tightened 50 that the plates 19 and 21 very firmly clamp the door frame therebetween.
The security device for the door is sim.ilar to the one used for the frame and includes an inner door plate 27 with a pair of spaced holes and an outer door plate 28 with a pair of spaced sleeves or sockets 29. These are installed in the same manner as the plates on the frame, by drilling holes thr~ugh the door perpendicular to the bolt 24 above and below the bolt tunnel and close to the edge of the door. Bolts 30 are then passed through the holes in the plate 27 and through the holes in the door " ~l2~3617 into the sockets 29. These bolts are firmly tightened to firmly clamp the door between the plates 27 and 28.
As will be seen from Figure 3, it i5 advantageous to engrave the word "security" on the exterior plates as a deterent to an intruder from bothering to try to forcibly and/or destructively open the door.
Claims (3)
1. Guard means for securing a door locked to a door frame by a dead bolt to prevent forceable entry, said dead bolt being mounted in the door for projection from the door edge and being adapted to lock the door by projecting through a hole in a strike plate mounted on the door frame and into a bolt tunnel extending into said door frame, said guard means comprising:
(a) a frame guard including a first plate member for the outside of the door frame, said first plate member having a pair of spaced threaded sleeves projecting from the inner face thereof and adapted to enter into holes extending through the door frame above and below the bolt tunnel and perpendicular to the axis thereof, a second plate member for the inside of the door frame having a pair of spaced holes and a pair of threaded fasteners adapted to pass through the second plate member holes, through the frame holes and into said threaded sleeves to firmly clamp the frame between the first and second plate members, and (b) a door guard including a first plate member for the outside of the door, said first plate member having a pair of spaced threaded sleeves projecting from the inner face thereof and adapted to enter into holes extending through the door above and below the bolt and perpendicular thereto, a second plate member for the inside of the door having a pair of spaced holes and a pair of threaded fasteners adapted to pass through the second plate member holes, through the door holes and into said threaded sleeves to firmly clamp the door between the first and second plate members.
(a) a frame guard including a first plate member for the outside of the door frame, said first plate member having a pair of spaced threaded sleeves projecting from the inner face thereof and adapted to enter into holes extending through the door frame above and below the bolt tunnel and perpendicular to the axis thereof, a second plate member for the inside of the door frame having a pair of spaced holes and a pair of threaded fasteners adapted to pass through the second plate member holes, through the frame holes and into said threaded sleeves to firmly clamp the frame between the first and second plate members, and (b) a door guard including a first plate member for the outside of the door, said first plate member having a pair of spaced threaded sleeves projecting from the inner face thereof and adapted to enter into holes extending through the door above and below the bolt and perpendicular thereto, a second plate member for the inside of the door having a pair of spaced holes and a pair of threaded fasteners adapted to pass through the second plate member holes, through the door holes and into said threaded sleeves to firmly clamp the door between the first and second plate members.
2. Guard means according to claim 1 wherein the threaded fasteners are bolts.
3. Guard means according to claim 1 wherein the holes are spaced at a distance of approximately three inches.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA000422854A CA1223617A (en) | 1983-03-04 | 1983-03-04 | Security device for doors and jambs |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA000422854A CA1223617A (en) | 1983-03-04 | 1983-03-04 | Security device for doors and jambs |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1223617A true CA1223617A (en) | 1987-06-30 |
Family
ID=4124706
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA000422854A Expired CA1223617A (en) | 1983-03-04 | 1983-03-04 | Security device for doors and jambs |
Country Status (1)
| Country | Link |
|---|---|
| CA (1) | CA1223617A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5427422A (en) * | 1993-09-24 | 1995-06-27 | Madlener; Josef | Door security system |
-
1983
- 1983-03-04 CA CA000422854A patent/CA1223617A/en not_active Expired
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5427422A (en) * | 1993-09-24 | 1995-06-27 | Madlener; Josef | Door security system |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| MKEX | Expiry |