CA2079615A1 - Security lock for door - Google Patents
Security lock for doorInfo
- Publication number
- CA2079615A1 CA2079615A1 CA 2079615 CA2079615A CA2079615A1 CA 2079615 A1 CA2079615 A1 CA 2079615A1 CA 2079615 CA2079615 CA 2079615 CA 2079615 A CA2079615 A CA 2079615A CA 2079615 A1 CA2079615 A1 CA 2079615A1
- Authority
- CA
- Canada
- Prior art keywords
- door
- security lock
- lock according
- opening
- shank portion
- 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.)
- Abandoned
Links
- 229910000639 Spring steel Inorganic materials 0.000 claims abstract description 6
- 230000009471 action Effects 0.000 claims abstract description 6
- 239000002184 metal Substances 0.000 claims description 13
- 229910052751 metal Inorganic materials 0.000 claims description 13
- 230000007246 mechanism Effects 0.000 claims description 4
- 238000007373 indentation Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 238000006748 scratching Methods 0.000 description 1
- 230000002393 scratching effect Effects 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
- 239000002023 wood Substances 0.000 description 1
Landscapes
- Lock And Its Accessories (AREA)
Abstract
ABSTRACT
A security lock is provided for a door used to open and close an opening defined by a door frame, the door having a reciprocable bolt movable into and out of a hole in the door frame. The lock comprises an elongate lock member having a flat end section with a central opening at one end of the lock member and a shank portion at the opposite end thereof. The flat end section is insertable between an edge of the door and the door frame. A hook element is connected to this end section and is located adjacent the central opening so as to project into the hole in the door frame during use of the lock. An integral tongue element has one end thereof connected to the shank portion and has a door engaging portion biased by spring action to move from a first position where the door can be opened or closed to a second position where the door is blocked and prevented from opening. Preferably the lock is made from spring steel.
A security lock is provided for a door used to open and close an opening defined by a door frame, the door having a reciprocable bolt movable into and out of a hole in the door frame. The lock comprises an elongate lock member having a flat end section with a central opening at one end of the lock member and a shank portion at the opposite end thereof. The flat end section is insertable between an edge of the door and the door frame. A hook element is connected to this end section and is located adjacent the central opening so as to project into the hole in the door frame during use of the lock. An integral tongue element has one end thereof connected to the shank portion and has a door engaging portion biased by spring action to move from a first position where the door can be opened or closed to a second position where the door is blocked and prevented from opening. Preferably the lock is made from spring steel.
Description
~79~
This invention relates to security locks and, in particular, locks designed for use with a door used to open and close an opening defined by a door frame, the door having a reciprocable bolt movable into and out of a hole in the door frame.
Various forms of security locks are known and are readily available. For example, the use of padlocks which either require a key to be opened or which have a dial for a secret combination to be entered are commonly used but such padlocks are not suitable for all applications and they can have disadvantages. For example, if a security lock is operated by a key, there is the hazard of the key being lost. In the case of a combination lock, the combination may be forgotten by the owner of the lock. Furthermore, a padlock can only be used where the door or other member to be locked is equipped with a suitable latch mechanism or hasp. Also, many locking devices may not be suitable for only temporary use on a door.
United States patent No. 4,471,981 issued September 18, 1984 to Thomas E. Wright teaches a security lock that can be used to temporarily lock a standard door that is mounted in a door opening having a door frame. This lock comprises two principal members, one being a locking bar having a flat end ~ection with a central opening. Extending from this opening is a hook end adapted to engage the striker plate depression in the door frame. The locking bar has a notched shank portion on which is adjustably mounted a lock piece or fastener. The position of this fastener can be adjusted on the shank in order to hold the door in the closed position.
This invention relates to security locks and, in particular, locks designed for use with a door used to open and close an opening defined by a door frame, the door having a reciprocable bolt movable into and out of a hole in the door frame.
Various forms of security locks are known and are readily available. For example, the use of padlocks which either require a key to be opened or which have a dial for a secret combination to be entered are commonly used but such padlocks are not suitable for all applications and they can have disadvantages. For example, if a security lock is operated by a key, there is the hazard of the key being lost. In the case of a combination lock, the combination may be forgotten by the owner of the lock. Furthermore, a padlock can only be used where the door or other member to be locked is equipped with a suitable latch mechanism or hasp. Also, many locking devices may not be suitable for only temporary use on a door.
United States patent No. 4,471,981 issued September 18, 1984 to Thomas E. Wright teaches a security lock that can be used to temporarily lock a standard door that is mounted in a door opening having a door frame. This lock comprises two principal members, one being a locking bar having a flat end ~ection with a central opening. Extending from this opening is a hook end adapted to engage the striker plate depression in the door frame. The locking bar has a notched shank portion on which is adjustably mounted a lock piece or fastener. The position of this fastener can be adjusted on the shank in order to hold the door in the closed position.
2~7~
One difficulty ith this type of lock is that it requires two principal components, both of which would appear to require several manufacturing steps and thus the complete lock would be reasonably expensive to build. This lock may also be relatively time consuming in its use as it requires some manoeuvring and adjusting to place it in the proper position for locking of the door.
The present invention provides a relatively simple security lock suitable for locking a standard door in a building, which lock can be constructed or made at a very reasonable cost. Furthermore, the security lock described herein is quite simple to use and requires very little time to be mounted between a door and a door frame.
According to one aspect of the invention, there is provided a security lock for a door used to open and close an opening defined by a door frame, the door having a reciprocal bolt movable into and out of a hole in the door frame. The lock comprises an elongate lock member having a flat end section with a central opening at one end of the lock member and a shank portion at the opposite end thereof. The flat end section is insertable between an edge of the door and the door frame with the shank portion pro;ecting outwardly from one side of the door. A hook element is connected to the flat end section and is located adjacent the central opening so as to project into the hole in the door frame during use of the lock. An integral tongue element has one end thereof connected to the shank portion. This tongue element has a door engaging portion biased by spring action of the tongue 2 ~
One difficulty ith this type of lock is that it requires two principal components, both of which would appear to require several manufacturing steps and thus the complete lock would be reasonably expensive to build. This lock may also be relatively time consuming in its use as it requires some manoeuvring and adjusting to place it in the proper position for locking of the door.
The present invention provides a relatively simple security lock suitable for locking a standard door in a building, which lock can be constructed or made at a very reasonable cost. Furthermore, the security lock described herein is quite simple to use and requires very little time to be mounted between a door and a door frame.
According to one aspect of the invention, there is provided a security lock for a door used to open and close an opening defined by a door frame, the door having a reciprocal bolt movable into and out of a hole in the door frame. The lock comprises an elongate lock member having a flat end section with a central opening at one end of the lock member and a shank portion at the opposite end thereof. The flat end section is insertable between an edge of the door and the door frame with the shank portion pro;ecting outwardly from one side of the door. A hook element is connected to the flat end section and is located adjacent the central opening so as to project into the hole in the door frame during use of the lock. An integral tongue element has one end thereof connected to the shank portion. This tongue element has a door engaging portion biased by spring action of the tongue 2 ~
element to move from a first position where the door can be opened or closed to a second position where the door is blocked and prevented from opening.
Preferably the tongue element includes a resilient stem portion integrally connected at one end thereof to the shank portion. The stem portion is positioned in an elongate opening formed centrally in the shank portion. The stem portion is preferably S-shaped along its length and is connected at its distal end to the door engaging portion, the latter portion extending generally in a transverse direction relative to the flat end section.
According to another aspect of the invention, a lock comprises a lock member having a flat end section with an opening therein at one end and a shank portion at the opposite end thereof. The flat end section is insertable between one edge of the door and the door frame. Means are provided for holding the flat end section between the door edge and the door frame when the door is closed. This holding mechanism is connected to the flat end section. There is also a resilient door engaging member mounted on the shank portion and biased to move from a first position where the door can be opened or closed to a second position where the door is blocked and prevented from opening.
In a preferred embodiment, the lock member is formed from a single piece of spring steel.
Further features and advantageous will become apparent from the following detailed description taken in conjunction with the accompanying drawings.
2~7~
In the drawings, Figure 1 is a fragmentary perspective view of a door and frame with a lock constructed in accordance with the invention attached in the locked position between the door nd frame;
Figure 2 is a cross-sectional view taken along the lines 2-2 of Figure 1;
Figure 3 is a side view of a security lock constructed in accordance with the invention;
Figure 4 is a perspective view of the lock of Figure 3;
Figure 5 is an end view of a two-prong pin that can be used in conjunction with the security lock;
Figure 6 is a perspective view of the pin of Figure 5 showlng the side thereof;
Figure 7 is a cross-sectional view similar to that of Figure 2 but showing the lock in the unlocked position, which position will permit the door to be opened; and Figure 8 is a cross-sectional view similar to that of Figure 2 but showing the lock with a two-prong pin positioned to remove play between the door and the door jamb.
In Figures 1 and 2 there is shown a security lock 10 for a swinging door 12 used to open and close an opening defined by a door frame 14, only a portion of which is shown. Both the door 12 and the door frame 14 are constructed in the usual well known manner and they will not be described in detail as they form no part of the present invention. The door 12 is opened and closed with the use of a door knob 16 which operates a latch mechanism that includes a reciprocable bolt 2~79~
18 movable into and out of a hole 20 in the door frame 14.
The perimeter of the hole 20 is defined by a metal striker plate 22 which has a rectangular central opening therein. The opening 24 in the striker plate reinforces the hole cut in the door frame which is usually made of wood. As is well know, a flat side 26 of the bolt engages against one edge of the striker plate opening in order to keep the door closed.
The door frame may be covered by the usual trim piece 28 and a lip formed on one edge of the striker plate can extend around one edge of the trim piece as shown in Figures 1 and 2.
The edge of the door is held in the closed position by means of the usual door jamb 31 which is firmly connected to the door frame.
Turning now to the security lock of the invention, the lock comprises an elongate lock member having a flat end section 30 at one end and a shank portion 32 at the opposite end thereof. The flat end section has a central opening 34 which can be generally rectangular. The end section 30 is reasonably thin so that it can be inserted between an edge 36 of the door and the door frame, as illustrated in Figures 1 and 2. In thls inserted position, the shank portion 32 projects outwardly from one side 38 of the door. The shank ~ortlon permits the lock to be gripped and held even when the lock is ln use and the door is closed.
In the preferred embodiment of the lock 10 illustrated in Figures 3 and 4, the end section 30 has angled corners 40 at one end. The angled corners (which could also be rounded) help to prevent the lock from marking or scratching the door ~7~
or door frame in use. A curved transition section 42 joins the end section 30 to the narrower shank portion 32. The shank portion preferably has a rounded end 44 which may form an obtuse angle with the remainder of the shank portion, if desired. The end section 30 may be provided with indentations 75 to locate holes that can be drilled for screws to attach the lock permanently to a door frame. These holes would be aligned with the standard screw holes in the striker plate.
If desired, the present lock can be substituted in place of a striker plate or can be attached over a striker plate by screws that attach both the lock 10 and the striker plate.
Located adjacent the central opening 34 is a hook element 46 which is integrally connected to the flat end section 30.
The hook element 46 provldes means for holding the flat end section between the door edge and the door frame 14 when the door is closed. The hook element is constructed so as to project into the hole 20 in the door frame during use of the lock 10. In the preferred embodiment shown, the hook element is formed with a pair of spaced apart teeth 48 adapted to engage a side of the hole 20.
The lock also includes an integral tongue element 50 havlng one end thereof connected to the shank portion 32.
This tongue element comprises a resilient door engaging member and it ls biased to move from a first position shown in Figure 7 of the drawings where the door 12 can be opened, to a second position shown in Figures 1 and 2 of the drawings, where the door is blocked and prevented from opening. The tongue element has a door engaging portion 52 which is biased by the 2 ~ 7 ~
spring action of the tongue element to move between the first and second positions. The preferred tongue element also includes a resilient stem portion 54, which is the portion integrally connected at one end to the shank portion. The stem portion is positioned in an elongate opening 56 formed centrally in the shank portion. The preferred stem portion is S-shaped along its length having a first bend at 58 and a second bend in the opposite direction at 60. The door engaging portion 52 extends generally in a transverse direction relative to the adjacent end portion of the stem portion and relative to the flat end section 30.
Preferably the lock member 10 is formed from a single piece of spring steel in order to provide the necessary resiliency, strength and spring action. It will also be appreciated that the preferred lock member can be manufactured at a relatively low cost by being stamped from a single flat piece of metal. The hook element 46 is formed from a first metal section cut out to form the central opening 34 and trimmed to form the desired shape for the hook element. The tongue element 50 is formed from a second metal section cut out from the elongate opening 56. As illustrated, the preferred elongate opening 56 extends right to the central o~ening 34 (see Figures 3 and 4). Preferably this second metal section is cut away so that there are clearance gaps 62 ~5 and 64 formed between the shank portion and the resilient stem portion 54, thus ensuring that the shank portion does not lnterfere with the spring action of the stem portion.
In the preferred embodiment of the tongue element 2~7~ 3 illustrated in Figure 2, this element has an extension 66 formed where the stem portion 54 meets the door engaging portion 52. The extension 66 projects in use towards an adjacent side of the door and acts to present excessive play between the door and the door jamb 31. In the embodiment shown in Figure 2, the extension is formed by means of a sharp U-bend in the tongue element where the stem portion meets the transversely extending section 52. It is, of course, possible to form the tongue element without the extension 66 as illustrated in Figures 3, 4 and 7.
In the illustrated preferred embodiment, the door engaging portion or transverse portion 52 of the tongue element has side edge tabs 70. These tabs prevent the tongue element from being pulled or pushed too far to one side of the lock. The tabs will engage corners 72 formed where the elongate opening 56 meets the central opening 34. The creation of these tabs creates semi-circular cut outs 74 on opposite sides of the opening 34.
Preferably the security lock 10 of the invention is provided with a locking pin member 76 which is adapted to hold the tongue element in either the first position where the door can be opened (see Figure 7) or the second position where the door is blocked (see Figure 2). The preferred form of locking pin member is shown in Figures 5 and 6 and this member has two prongs 78 and 80 which are joined at one end 82. At least one of the two prongs is sufficiently small that it will fit in the opening 84 when the lock is in the position shown in Figure 2 and it will fit in the opening 86 when the lock is in ~7~5 the unlocked position shown in Figure 7. In addition to the functions of keeping the lock in either the unlocked position or the locked position, the illustrated pin member 76 can also be used to eliminate play between the door and the door jamb as shown in Figure 8. Instead of using the extension 66, the two prong lock member 76 can be placed on the door engaging portion 52 at the illustrated location between the end section 30 and the stem portion 54. This maintains the door in the shut tight position as well as locked from the inside.
It will be appreciated that various modifications and changes can be made to the security lock as described herein without departing from the spirit and scope of this invention.
For example, the lock can be made from metals other than spring steel, provided the metal chosen has the necessary strength and resiliency. Also, instead of forming the extension 66 in the manner shown in Figure 2, the extension could be formed by welding an extension member at the junction between the transverse portion 52 and the stem portion 54.
It will also be understood by those skilled in the art that the lock 10 of the invention could be e~uipped with an electronic or electric warning device to indicate to the user that an attempt is being made to open the door. For example, an electrical contact located on a door engaging portion 52 and connected to a buzzer or other alarm could be used for thls purpose. The contact would be closed by the side of the door engaging or pressing against the contact when someone attempts to open the door.
Preferably the tongue element includes a resilient stem portion integrally connected at one end thereof to the shank portion. The stem portion is positioned in an elongate opening formed centrally in the shank portion. The stem portion is preferably S-shaped along its length and is connected at its distal end to the door engaging portion, the latter portion extending generally in a transverse direction relative to the flat end section.
According to another aspect of the invention, a lock comprises a lock member having a flat end section with an opening therein at one end and a shank portion at the opposite end thereof. The flat end section is insertable between one edge of the door and the door frame. Means are provided for holding the flat end section between the door edge and the door frame when the door is closed. This holding mechanism is connected to the flat end section. There is also a resilient door engaging member mounted on the shank portion and biased to move from a first position where the door can be opened or closed to a second position where the door is blocked and prevented from opening.
In a preferred embodiment, the lock member is formed from a single piece of spring steel.
Further features and advantageous will become apparent from the following detailed description taken in conjunction with the accompanying drawings.
2~7~
In the drawings, Figure 1 is a fragmentary perspective view of a door and frame with a lock constructed in accordance with the invention attached in the locked position between the door nd frame;
Figure 2 is a cross-sectional view taken along the lines 2-2 of Figure 1;
Figure 3 is a side view of a security lock constructed in accordance with the invention;
Figure 4 is a perspective view of the lock of Figure 3;
Figure 5 is an end view of a two-prong pin that can be used in conjunction with the security lock;
Figure 6 is a perspective view of the pin of Figure 5 showlng the side thereof;
Figure 7 is a cross-sectional view similar to that of Figure 2 but showing the lock in the unlocked position, which position will permit the door to be opened; and Figure 8 is a cross-sectional view similar to that of Figure 2 but showing the lock with a two-prong pin positioned to remove play between the door and the door jamb.
In Figures 1 and 2 there is shown a security lock 10 for a swinging door 12 used to open and close an opening defined by a door frame 14, only a portion of which is shown. Both the door 12 and the door frame 14 are constructed in the usual well known manner and they will not be described in detail as they form no part of the present invention. The door 12 is opened and closed with the use of a door knob 16 which operates a latch mechanism that includes a reciprocable bolt 2~79~
18 movable into and out of a hole 20 in the door frame 14.
The perimeter of the hole 20 is defined by a metal striker plate 22 which has a rectangular central opening therein. The opening 24 in the striker plate reinforces the hole cut in the door frame which is usually made of wood. As is well know, a flat side 26 of the bolt engages against one edge of the striker plate opening in order to keep the door closed.
The door frame may be covered by the usual trim piece 28 and a lip formed on one edge of the striker plate can extend around one edge of the trim piece as shown in Figures 1 and 2.
The edge of the door is held in the closed position by means of the usual door jamb 31 which is firmly connected to the door frame.
Turning now to the security lock of the invention, the lock comprises an elongate lock member having a flat end section 30 at one end and a shank portion 32 at the opposite end thereof. The flat end section has a central opening 34 which can be generally rectangular. The end section 30 is reasonably thin so that it can be inserted between an edge 36 of the door and the door frame, as illustrated in Figures 1 and 2. In thls inserted position, the shank portion 32 projects outwardly from one side 38 of the door. The shank ~ortlon permits the lock to be gripped and held even when the lock is ln use and the door is closed.
In the preferred embodiment of the lock 10 illustrated in Figures 3 and 4, the end section 30 has angled corners 40 at one end. The angled corners (which could also be rounded) help to prevent the lock from marking or scratching the door ~7~
or door frame in use. A curved transition section 42 joins the end section 30 to the narrower shank portion 32. The shank portion preferably has a rounded end 44 which may form an obtuse angle with the remainder of the shank portion, if desired. The end section 30 may be provided with indentations 75 to locate holes that can be drilled for screws to attach the lock permanently to a door frame. These holes would be aligned with the standard screw holes in the striker plate.
If desired, the present lock can be substituted in place of a striker plate or can be attached over a striker plate by screws that attach both the lock 10 and the striker plate.
Located adjacent the central opening 34 is a hook element 46 which is integrally connected to the flat end section 30.
The hook element 46 provldes means for holding the flat end section between the door edge and the door frame 14 when the door is closed. The hook element is constructed so as to project into the hole 20 in the door frame during use of the lock 10. In the preferred embodiment shown, the hook element is formed with a pair of spaced apart teeth 48 adapted to engage a side of the hole 20.
The lock also includes an integral tongue element 50 havlng one end thereof connected to the shank portion 32.
This tongue element comprises a resilient door engaging member and it ls biased to move from a first position shown in Figure 7 of the drawings where the door 12 can be opened, to a second position shown in Figures 1 and 2 of the drawings, where the door is blocked and prevented from opening. The tongue element has a door engaging portion 52 which is biased by the 2 ~ 7 ~
spring action of the tongue element to move between the first and second positions. The preferred tongue element also includes a resilient stem portion 54, which is the portion integrally connected at one end to the shank portion. The stem portion is positioned in an elongate opening 56 formed centrally in the shank portion. The preferred stem portion is S-shaped along its length having a first bend at 58 and a second bend in the opposite direction at 60. The door engaging portion 52 extends generally in a transverse direction relative to the adjacent end portion of the stem portion and relative to the flat end section 30.
Preferably the lock member 10 is formed from a single piece of spring steel in order to provide the necessary resiliency, strength and spring action. It will also be appreciated that the preferred lock member can be manufactured at a relatively low cost by being stamped from a single flat piece of metal. The hook element 46 is formed from a first metal section cut out to form the central opening 34 and trimmed to form the desired shape for the hook element. The tongue element 50 is formed from a second metal section cut out from the elongate opening 56. As illustrated, the preferred elongate opening 56 extends right to the central o~ening 34 (see Figures 3 and 4). Preferably this second metal section is cut away so that there are clearance gaps 62 ~5 and 64 formed between the shank portion and the resilient stem portion 54, thus ensuring that the shank portion does not lnterfere with the spring action of the stem portion.
In the preferred embodiment of the tongue element 2~7~ 3 illustrated in Figure 2, this element has an extension 66 formed where the stem portion 54 meets the door engaging portion 52. The extension 66 projects in use towards an adjacent side of the door and acts to present excessive play between the door and the door jamb 31. In the embodiment shown in Figure 2, the extension is formed by means of a sharp U-bend in the tongue element where the stem portion meets the transversely extending section 52. It is, of course, possible to form the tongue element without the extension 66 as illustrated in Figures 3, 4 and 7.
In the illustrated preferred embodiment, the door engaging portion or transverse portion 52 of the tongue element has side edge tabs 70. These tabs prevent the tongue element from being pulled or pushed too far to one side of the lock. The tabs will engage corners 72 formed where the elongate opening 56 meets the central opening 34. The creation of these tabs creates semi-circular cut outs 74 on opposite sides of the opening 34.
Preferably the security lock 10 of the invention is provided with a locking pin member 76 which is adapted to hold the tongue element in either the first position where the door can be opened (see Figure 7) or the second position where the door is blocked (see Figure 2). The preferred form of locking pin member is shown in Figures 5 and 6 and this member has two prongs 78 and 80 which are joined at one end 82. At least one of the two prongs is sufficiently small that it will fit in the opening 84 when the lock is in the position shown in Figure 2 and it will fit in the opening 86 when the lock is in ~7~5 the unlocked position shown in Figure 7. In addition to the functions of keeping the lock in either the unlocked position or the locked position, the illustrated pin member 76 can also be used to eliminate play between the door and the door jamb as shown in Figure 8. Instead of using the extension 66, the two prong lock member 76 can be placed on the door engaging portion 52 at the illustrated location between the end section 30 and the stem portion 54. This maintains the door in the shut tight position as well as locked from the inside.
It will be appreciated that various modifications and changes can be made to the security lock as described herein without departing from the spirit and scope of this invention.
For example, the lock can be made from metals other than spring steel, provided the metal chosen has the necessary strength and resiliency. Also, instead of forming the extension 66 in the manner shown in Figure 2, the extension could be formed by welding an extension member at the junction between the transverse portion 52 and the stem portion 54.
It will also be understood by those skilled in the art that the lock 10 of the invention could be e~uipped with an electronic or electric warning device to indicate to the user that an attempt is being made to open the door. For example, an electrical contact located on a door engaging portion 52 and connected to a buzzer or other alarm could be used for thls purpose. The contact would be closed by the side of the door engaging or pressing against the contact when someone attempts to open the door.
Claims (20)
1. A security lock for a door used to open and close an opening defined by a door frame, said door having a reciprocable bolt movable into and out of a hole in said door frame, said lock comprising an elongate lock member having a flat end section with a central opening at one end of the lock member and a shank portion at the opposite end thereof, said flat end section being insertable between an edge of the door and said door frame with the shank portion projecting outwardly from one side of the door, a hook element connected to said flat end section and located adjacent said central opening so as to project into said hole in said door frame during use of the lock, and an integral tongue element having one end thereof connected to said shank portion, said tongue element having a door engaging portion biased by spring action of the tongue element to move from the first position wherein said door can be opened or closed to a second position where said door is blocked and prevented from opening.
2. A security lock according to claim 1 wherein said tongue element includes a resilient stem portion integrally connected at one end thereof to said shank portion, said stem portion being positioned in an elongate opening formed centrally in said shank portion.
3. A security lock according to claim 2 wherein said stem portion is S-shaped along its length and is connected at its distal end to said door engaging portion, the latter portion extending generally in a transverse direction relative to said flat end section.
4. A security lock according to any one of claims 1 to 3 including a locking pin member adapted to hold said tongue element in the first position where said door can be opened or closed.
5. A security lock according to any one of claims 1 to 3 including a two-prong locking pin member adapted to hold said tongue element in either the first position where said door can be opened or closed or said second position where said door is blocked.
6. A security lock according to any one of claims 1 to 3 wherein said lock member is formed from a single piece of spring steel.
7. A security lock according to any one of claims 1 to 3 wherein said hook element is formed with a pair of spaced apart teeth adapted to engage a side of said hole in the door frame.
8. A security lock according to claim 2 or 3 wherein said lock member is stamped from a single flat piece of metal, said hook element is formed from a first metal section cut out to form said central opening, and said tongue element is formed from a second metal section cut out from said elongate opening in said shank portion, which elongate opening extends to said central opening.
9. A security lock according to claim 2 wherein said tongue element has an extension formed where said stem portion meets said door engaging portion, said extension projecting in use towards an adjacent side of the door and acting to prevent excessive play between the door and a door jamb.
10. A security lock according to claim 9 wherein said extension is formed by forming a sharp U-bend in the tongue element where said stem portion meets said door engaging portion.
11. A security lock for a door used to open and close an opening defined by a door frame, said door including a latch mechanism with a reciprocable bolt movable into and out of a hole in said door frame, said lock comprising a lock member having a flat end section with an opening therein at one end and a shank portion at the opposite end thereof, said flat end section being insertable between one edge of the door and said door frame, means for holding said flat end section between said door edge and said door frame when said door is closed, said holding means being connected to said flat end section, and a resilient door engaging member mounted on said shank portion and biased to move from a first position where said door can be opened or closed to a second position where said door is blocked and prevented from opening.
12. A security lock according to claim 11 wherein said lock member is formed from a single piece of spring steel.
13. A security lock according to claim 11 including a locking pin member adapted to hold said door engaging member in either the first position or the second position.
14. A security lock according to any one of claims 11 to 13 wherein said door engaging member includes a resilient stem portion integrally connected at one end thereof to said shank portion, said stem portion being positioned in an elongate opening formed centrally in said shank portion.
15. A security lock according to any one of claims 11 to 13 wherein said door engaging member includes a resilient stem portion integrally connected at one end thereof to said shank portion and a door engaging end portion, and said stem portion is S-shaped along its length and is connected at its distal end to said door engaging portion, the latter portion extending generally in a transverse direction relative to said flat end section.
16. A security lock according to claim 13 wherein said pin member has two parallel prongs joined together at one end of the pin member.
17. A security lock according to claim 11 or 12 wherein said lock member is stamped from a single flat piece of metal, said holding means is formed from a first metal section cut out to form said opening in said end section, and said door engaging member is formed from a second metal section cut out from an elongate opening in said shank portion.
18. A security lock according to claim 12 wherein said door engaging member has an extension formed at one end, said extension projecting in use towards an adjacent side of the door and acting to prevent excessive play between the door and a door jamb.
19. A security lock according to claim 18 wherein said extension is formed by means of a sharp U-bend in the door engaging member.
20. A security lock according to claim 18 including a locking pin member adapted to hold said door engaging member in either the first position or the second position.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA 2079615 CA2079615A1 (en) | 1992-10-01 | 1992-10-01 | Security lock for door |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA 2079615 CA2079615A1 (en) | 1992-10-01 | 1992-10-01 | Security lock for door |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA2079615A1 true CA2079615A1 (en) | 1992-11-29 |
Family
ID=4150481
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA 2079615 Abandoned CA2079615A1 (en) | 1992-10-01 | 1992-10-01 | Security lock for door |
Country Status (1)
| Country | Link |
|---|---|
| CA (1) | CA2079615A1 (en) |
-
1992
- 1992-10-01 CA CA 2079615 patent/CA2079615A1/en not_active Abandoned
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| EEER | Examination request | ||
| FZDE | Dead |