Perimeter security system with improved Z-bar lock for maximum degree of mechanical and electronic protection
AssigneeThe Brooke-Duveen Group Ltd.
InventorAlvin S. Levenson
Life of this patent
Estimating the term…
Abstract
A Z-bar security system, one which is provided with a key and a secured latch, is combined with an electronic alarm and monitoring system. This combination provides the maximum degree of both mechanical and electronic security. In a preferred embodiment, a Z-bar latch assembly has a three-position rotatable cylinder which is operable by a key from outside of the door. These three positions correspond, respectively, to "open", "viewing" and "closed" positions of the door.
Claims39
In combination with a system to secure a latch member of a Z-Bar door latch system to a latch plate, wherein the Z-Bar door latch system provides (1) entry, (2) inspection, and (3) dead bolt modes of operation, and wherein the system to secure the latch member comprises:
- a latch plate for mounting on a door frame;
- a Z-Bar latch assembly for mounting onto an interior side of a door, the Z-Bar latch assembly including (1) a base plate for securing to an edge of said door, (2) an intermediate link pivotally connected to said base plate, and (3) a mode selection and latching assembly pivotally mounted to said intermediate link, said Z-Bar latch assembly further comprising a latch member;
- said latch plate comprising a tube having a tube opening for receiving said latch member;
- a sleeve having an opening, said sleeve being rotatably positioned inside of said tube of said latch plate;
- a handle affixed to one end of said sleeve for rotating said sleeve to engage said latch member inside said sleeve in a secure position;
- said latch plate further comprising a locking device which releasably locks said sleeve into said secure position, said locking device comprising a locking detent, a locking member, and a spring, said spring releasably holding said detent into engagement with said locking member in said secure position until said spring is compressed;
- and
- a latch assembly control mechanism to selectively lock and unlock said latch assembly from an exterior side of the door, said mechanism comprising a key-operated cylinder for mounting on said exterior of the door, a shaft connected at one end to said key-operated cylinder and a freely rotatable adapter connected to an opposite end of the shaft,
- wherein rotation of the handle in a first direction engages the sleeve in the secure position with the spring in the locking device urging the locking detent into engagement with the locking member such that the sleeve is prevented from rotating and movement of the latch member is prevented even with use of the key, and
- wherein rotation of the handle in an opposite second direction against the urging of the spring releases the engagement of the locking detent from the locking member such that the sleeve rotates and the key controls movement of the latch member such that the latch member may be disengaged from the sleeve;
- an electronic alarm system having at least one sensor, thereby providing the maximum degree of mechanical and electronic security.
In combination with a system for pivotally securing a latch member to a latch plate mounted on a door frame, wherein said system comprises:
- a latch plate comprising a tube having an opening for receiving said latch member;
- a rotatable sleeve having a sleeve opening, said sleeve being positioned inside of said tube of said latch plate;
- a handle affixed to one end of said sleeve for rotating said sleeve to engage the latch member inside said sleeve opening in a secured position;
- and
- said latch plate further comprising a locking system which releasably prevents said handle and sleeve from rotating relative to said tube in said secured position, wherein said latch member is prevented from being disengaged from said opening in said sleeve, said locking system comprising a locking detent, a locking member, and a spring, said spring selectively holding said detent into engagement with said locking member in said secured position until said spring is compressed, and
- an electronic alarm system having at least one sensor, thereby providing the maximum degree of mechanical and electronic security.
In combination with a system to secure a latch member of a Z-Bar door latch system to a latch plate, wherein the Z-Bar door latch system provides (1) entry, (2) inspection, and (3) dead bolt modes of operation, and wherein the system to secure the latch member comprises:
- a latch plate for mounting on a door frame;
- a Z-Bar latch assembly for mounting onto a door, the Z-Bar latch assembly including (1) a base plate for securing to an edge of said door, (2) an intermediate link pivoted to said base plate, and (3) a mode selection and latching assembly pivotably mounted to said intermediate link, said Z-Bar latch assembly further comprising a latch member;
- said latch plate comprising a tube having a tube opening for receiving said latch member;
- a sleeve having an opening, said sleeve being rotatably positioned inside of said tube of said latch plate;
- a handle affixed to one end of said sleeve for rotating said sleeve to engage said latch member inside said opening in said sleeve in a secure position;
- and
- said latch plate further comprising a locking device to prevent the handle and sleeve from rotating, wherein the latch member is prevented from being disengaged from said opening in said sleeve;
- an electronic alarm system having at least one sensor, thereby providing the maximum degree of mechanical and electronic security.
In combination with a Z-Bar door security system providing (1) entry, (2) inspection, and (3) dead bolt modes of operation, which can be locked and unlocked from an exterior side of a door, and wherein the system comprises:
- a latch plate for mounting on a frame of the door, said latch plate having an opening for receiving a latch member;
- a Z-Bar latch assembly for mounting on an interior side of the door including (1) a base plate f,or securing to an edge of the interior side of the door in juxtaposition to said latch plate, (2) an intermediate link pivotally connected to said base plate, and (3) a mode selection and latching assembly pivotably mounted to said intermediate link;
- said mode selection and latching assembly including a control knob, an extendable high strength latch member, and a camming mechanism to linearly advance said latch member into engagement with said opening in said latch plate, to implement the inspection and the dead bolt modes of operation;
- a securing member which secures the base plate, the intermediate link and the mode selection and latching assembly together in a secured position while the latch member is extended into engagement with the latch plate in the dead bolt mode of operation;
- and
- a latch assembly control mechanism which may be mounted on the exterior side of a door to selectively lock and unlock said latch assembly from the exterior side of the door, and
- releasable connecting means between the latch assembly control mechanism and the securing member wherein the latch assembly control mechanism may be disconnected from the securing member;
- an electronic alarm system having at least one sensor, thereby providing the maximum degree of mechanical and electronic security.
In combination with a Z-Bar door security system providing (1) entry, (2) inspection, and (3) dead bolt modes of operation, which can be locked and unlocked from an exterior side of a door, and wherein the system comprises:
- a latch plate for mounting on a frame of the door, said latch plate having an opening for receiving a latch member;
- a Z-Bar latch assembly for mounting on an interior side of the door including (1) a base plate for securing to an edge of the interior side of the door in juxtaposition to said latch plate, (2) an intermediate link pivotally connected to said base plate, and (3) a mode selection and latching assembly pivotally mounted to said intermediate link;
- said selection and latching assembly including an extendable high strength latch member, and a camming mechanism to linearly advance said latch member into engagement with said opening in said latch plate, to implement the inspection and the dead bolt modes of operation;
- a securing member which secures the base plate, the intermediate link and the mode selection and latching assembly together in a secured position while the latch member is extended into engagement with the latch plate in the dead bolt mode of operation;
- a latch assembly control mechanism which may be mounted on the exterior side of a door to selectively lock and unlock said latch assembly from the exterior side of the door, wherein said latch assembly control mechanism comprises a key-operated cylinder for mounting on the exterior of the door, a shaft connected at one end to said key-operated cylinder, and an adapter connected to an opposite end of the shaft for rotational engagement with said securing member, and
- wherein said adapter includes prongs which rotationally engage with said securing member;
- an electronic alarm system having at least one sensor, thereby providing the maximum degree of mechanical and electronic security.
In combination with a door and door jamb for locking the door to the door jamb, wherein:
- a Z-Bar latch assembly is mounted on the door, the Z-Bar latch assembly including a base plate secured to an interior side of the door in juxtaposition to an adapter means secured to the interior side of the door, an intermediate link pivotably connected to the base plate, a mode selection and latching assembly pivotably connected to the intermediate link,
- the mode selection and latching assembly connected to and controlling a securing member,
- an extendable latch member connected to and controlled by the mode selection and latching assembly,
- a spring-loaded latch plate assembly releasably receiving and securing the latch member, and
- a key and cylinder mounted on an exterior side of the door, extending through the door to the adapter means wherein the key and cylinder permit opening and locking of the system from the exterior of the door,
- the latch plate assembly further having a movable handle to be placed in a selected first position or a second position, wherein in the first position, the latch member is releasably received in the latch plate assembly and may be opened and locked by the key and cylinder and in the second position, the latch member is secured in the latch plate assembly and opening and unlocking by the key and cylinder is prevented;
- an electronic alarm system having at least one sensor, thereby providing the maximum degree of mechanical and electronic security.
In combination with a Z-Bar locking system cooperating with a door and a door jamb, the improvement which comprises a Z-bar latching assembly and an adapter means mounted on the door, the adapter means actuated by a key which respectively locks and releases the Z-Bar locking system externally of the door, the adapter means having a freely rotatable adapter and a securing member releasably engaged by the adapter, the securing member being connected with a latching member which releasably engages a latch plate assembly on the door jamb;
- and an electronic alarm system having at least one sensor, thereby providing the maximum degree of mechanical and electronic security.
In combination with a Z-Bar locking system cooperating with a door and a door jamb, the Z-Bar locking system having a base plate secured to an interior side of the door in juxtaposition to an adapter means secured to the interior side of the door, an intermediate link pivotally connected to the base plate, a mode selection and latching assembly pivotally connected to the intermediate link,
- an extendable latch member connected to and controlled by the mode selection and latching assembly,
- a latch plate assembly mounted on the door jamb, the latch plate assembly releasably receiving the extendable latch member, and
- the latch plate assembly having a spring-loaded locking detent to secure and release the latch member in the latch plate assembly;
- an electronic alarm system having at least one sensor, thereby providing the maximum degree of mechanical and electronic security.
In combination with a Z-Bar latch assembly mounted on a door, having a base plate secured to an interior side, an intermediate link pivotally connected to the base plate, a mode selection and latching assembly pivotably connected to the intermediate link, and a latch plate assembly mounted on a door jamb, wherein the latching assembly is releasably connected to the latch plate assembly, an improvement comprising:
- a key operated lock mounted on an exterior side of the door and connected by releasable means, through the door, to a control knob on the mode selection and latching assembly wherein rotation of a key produces concomitant rotation of the control knob to move a latch member of the latching assembly to engage and disengage the latch plate assembly such that the Z-Bar latch assembly may be locked and unlocked exteriorly of the door, and an electronic alarm system having at least one sensor, thereby providing the maximum degree of mechanical and electronic security.
In combination with a door received within a door jamb, a Z-Bar latch assembly mounted on the inside of the door and having a three-position rotating cylinder operable by a key from outside of the door, the cylinder having three positions corresponding to "open", "viewing" and "closed" positions of the door, respectively, the Z-Bar latch assembly further having a pivotable plate operable in the "viewing" position of the door to enable the door to be opened partially, such that a visitor may be properly identified while providing good security against an intruder, a laterally-movable latch member operated by the rotating cylinder, a latch plate assembly mounted on the door jamb for receiving the latch member, and the latch plate assembly including manually-selectable means for preventing the door from being opened even if the rotating cylinder is turned by the key from outside of the door;
- and an electronic alarm system having at least one sensor, thereby providing the maximum degree of mechanical and electronic security.
In combination with a system cooperating with a door and a door jamb, wherein:
- a Z-Bar latch assembly is mounted on the door, the Z-Bar latch assembly including a base plate secured to an interior side of the door in juxtaposition to an adapter plate secured to the interior side of the door, an intermediate link pivotally connected to the base plate, a mode selection and latch assembly pivotally connected to the intermediate link, wherein the Z-Bar latching assembly provides (1) entry, (2) inspection, and (3) deadbolt modes of operation,
- the mode selection and latching assembly having a control knob connected to and controlling a securing member,
- an extendable latch member connected to and controlled by the mode selection and latching assembly,
- a latch plate assembly mounted on the door jamb releasably receiving and securing the latch member,
- a freely rotatable adapter connected to the adapter plate, wherein the rotatable adapter may releasably engage and disengage the securing member, the adapter plate aligning the rotatable adapter with the securing member,
- a key operated cylinder mounted on an exterior side of the door and connected to the adapter plate and connected to the adapter wherein rotation of a key produces rotation of the adapter,
- such that in the entry mode, the key from the exterior and the control knob from the interior, rotate the adapter and the securing member to move the extendable latch member from the latch plate assembly such that the door may be opened,
- in the inspection mode, the control knob moves the extendable latch member to be received in the latch plate assembly, the adapter being disengaged from the securing member so that the key is prevented from controlling the Z-Bar latch assembly and the door may be partially opened for viewing while denying entry,
- in the deadbolt mode, the extendable latch member is securely received by the latch plate assembly and the securing member is engaged by the adapter to lock the door such that the key from the exterior, and the control knob from the interior, may unlock the system, and
- an electronic alarm system having at least one sensor, thereby providing the maximum degree of mechanical and electronic security.
A perimeter security system, wherein the system includes at least one door received within a doorjamb, a lock assembly mounted on the inside of the door and having a three-position rotating cylinder operable by a key from outside of the door, the cylinder having three positions corresponding to "open", "viewing" and "closed" positions of the door, respectively, wherein in the "viewing" position of the door, the door may be opened partially, such that a visitor may be properly identified while providing good security against an intruder, a laterally-movable latch member operated by the rotating cylinder, a latch assembly mounted on the door jamb for receiving the latch member, the latch assembly including manually-selectable means for preventing the door from being opened, an alarm system including at least a first sensor for detecting when the door has been forced open by an intruder, the alarm system further including a transmitter responsive to the first sensor for generating an alarm signal, and a remote receiver for receiving the alarm signal from the transmitter.
A perimeter security system, wherein the system includes at least one door received within a door jamb, a lock assembly mounted on the inside of the door and having a three-position rotating cylinder operable by a key from outside of the door, the cylinder having three positions corresponding to "open", "viewing" and "closed" positions of the door, respectively, wherein in the "viewing" position of the door, the door may be opened partially, such that a visitor may be properly identified while providing good security against an intruder, a laterally-movable latch member operated by the rotating cylinder, a latch assembly mounted on the door jamb for receiving the latch member, the latch assembly including manually-selectable means for preventing the door from being opened, an alarm system including at least a first sensor for detecting when the door has been forced open by an intruder, a second sensor for detecting tampering of the lock assembly, a third sensor for detecting movement within a certain distance of the door externally thereof, a transmitter responsive to any one of the three sensors for generating an alarm signal, and a remote receiver for receiving the alarm signal from the transmitter and thereby generating an alarm monitored by a central station, thereby providing the maximum degree of mechanical and electronic protection.
Dependencies are inferred from the claim text.