WO2024114935A1

WO2024114935A1 - Modular smoke generator

Info

Publication number: WO2024114935A1
Application number: PCT/EP2022/088072
Authority: WO
Original assignee: Verisure Sàrl
Priority date: 2022-11-29
Filing date: 2022-12-30
Publication date: 2024-06-06

Abstract

There is provided a modular smoke generator, modular components thereof, and manufacturing methods of said components. The smoke generator comprises a support unit, a pyrotechnic canister, and a smoke generator module for holding the pyrotechnic canister. The smoke generator module preferably comprises a deflector for deflecting obfuscating gas generated by the pyrotechnic canister. The provided systems and methods are, among other things, adapted for placement within a variety of installation settings, for safely handling hot gases at the exit while being cost- efficient to manufacture, and for secure attachment of the smoke generator module to the support unit.

Description

MODU LAR SMOKE G EN ERATOR

TECH N ICAL FI E LD

The present invention relates to an obfuscation cloud generator for an intruder security system, and more particularly to modular components of a pyrotechnic smoke generator and manufacturing methods thereof.

BACKG ROU N D

Intruder security systems used in buildings, houses, homes, offices, or other premises, may utilize smoke-generating devices that, upon activation, emits smoke which impairs the sight of an intruder. The smoke-generating devices may comprise a pyrotechnic canister for generation of pyrotechnic gas.

Such devices have to generate a large amount of cloud gas in a relatively short space of time, and in rapid response to an electric control signal. Also, the devices have to be small in size and acceptable, both in terms of performance and ergonomics, within a room, for example, a domestic setting.

However, known smoke-generating devices are commonly designed for installation in a specific installation environment (e.g. a specific room or the like). They may therefore offer limited flexibility and/or be expensive or complex to manufacture.

Known smoke-generating devices are also commonly associated with a risk of scorching of adjacent surfaces to where the smoke-generating device is mounted from the emission of the hot pyrotechnic gas.

From the above, it is understood that there is room for improvements and the invention aims to solve or at least mitigate the above and other problems.

SU M MARY

The invention is defined by the appended independent claims. Additional features and advantages of the concepts disclosed herein are set forth in the description which follows, and in part will be clear from the description, or may be learned by practice of the described technologies. The features and advantages of the concepts may be realized and obtained by means of the instruments and combinations particularly pointed out in the appended claims. These and other features of the described technologies will become more fully apparent from the following description and appended claims, or may be learned by the practice of the disclosed concepts as set forth herein.

It is an objective of the invention to provide a modular smoke generator that is adapted for placement within a variety of installation settings, so as to enhance the versatility of the smoke generator. Another objective of the invention is to provide an obfuscation smoke generator module that can safely handle hot gases at the exit while being cost-efficient to manufacture.

Yet another objective is to provide an obfuscation smoke generator module that can be securely attached to a support unit.

According to a first aspect, there is provided a smoke generator module for a smoke generator of an intruder security system, wherein the smoke generator module comprises: a mounting interface connectable to a first mount for mounting of the smoke generator module on a mounting surface in a first mount position and separately connectable to a second mount for mounting of the smoke generator module on the mounting surface in a second mount position; canister holding means configured to hold a pyrotechnical canister for generating obfuscating gas; and a deflector arranged to deflect the obfuscating gas along a predetermined discharge axis relative to the mounting surface when the smoke generator module is mounted in the first mount position and along substantially the same pre-determined discharge axis relative to the mounting surface when the smoke generator module is mounted in the second mount position.

The smoke generator module is advantageous in that it can be used in connection with at least two different mounts for mounting in respective at least two different mount positions (e.g. orientations relative to a mounting surface) while maintaining the same predetermined discharge axis of the discharged obfuscating gas. The smoke generator module is thus adapted for installation in a variety of installation settings or environments, so as to increase its versatility. The smoke generator module also reduces the risk of scorching or otherwise marking adjacent surfaces by the hot obfuscating gas ejected by the canister, since the direction of the discharged gas can be predetermined, and reliably kept the same between several mount positions.

In embodiments, the first mount and the second mount may be separate mount devices, or the first mount and the second mount may be comprised by the same mount device. For example, a single mounting device may be adaptable for a plurality of mount positions including the first and second mount positions.

The smoke generator module may be adapted to be mountable in two mount positions that are substantially perpendicular to each other. The deflector may then be arranged to deflect the obfuscating gas at an angle of 40 to 50 degrees, and preferably about 45 degrees, relative to a main axis of the smoke generator module. The main axis may be a longitudinal axis in the case of a smoke generator module that is at least partly elongate, and/or it may be a central axis in the case of a smoke generator module with a cylindrical or rounded shape. It is noted that the above-mentioned deflection angle of 40 to 50 degrees is non- essential, and the specific angular range may be determined in dependence on the specific mount positions that are desired.

For example, the smoke generator module may be, in the first mount position, in a substantially vertical orientation, and in the second mount position, in a substantially horizontal position.

The smoke generator module can accordingly be used both in a vertical and/or upright position where the smoke generator module fits compactly against the wall surface, and protrudes from said wall surface by a sufficiently small amount so as not to be an inconvenience, and in a horizontal and/or lying position where the smoke generator module has a lower top to bottom profile. The smoke generator module is accordingly adaptable to the needs of the user and the room or space where it is to be installed.

Preferably, the deflector comprises an at least partly slanting surface. The slanting surface or surface portion may different slant angle s at different positions along the surface, or it may have a generally constant slant angle. The angle of slant may optionally be between 40 and 50 degrees, preferably about 45 degrees, relative to a main axis of the smoke generator module. Howsoever implemented, the obfuscating gas may accordingly be deflected by the slanting surface so as to be ejected along the predetermined discharge axis. The slanting surface or surface portion advantageously allows the deflector to be a fixed deflector which reduces the manufacturing complexity and cost. A fixed deflector may also increase the lifetime of the deflector because it does not comprise any moving or moveable parts.

Alternatively, or additionally, the deflector may be a moveable deflector configured to be moved between a first deflector position and a second deflector position. A moveable deflector further increases the versatility of the smoke generator module and allows for the smoke generator module to be used in further, or different, mount positions. In particular, a moveable deflector is not limited to the above-mentioned predetermined discharge axis angled at 40 to 50 degrees relative to the mounting surface.

In one embodiment, the moveable deflector may comprise a slanting surface that is movable between a first slanting angle and a second slanting angle. Thus, the deflection angle can easily be adjusted (e.g. by a user) when the mount position is changed.

In one embodiment, the moveable deflector is rotatable between the first deflector position and the second deflector position. The rotatable deflector allows a user to rotate the deflector so as to ensure that the deflector surface is facing away from the wall and/or ceiling surface and/or is pointing along the predetermined discharge axis irrespective of mount position. Preferably, the mounting surface is a wall surface. A wall surface is typically more solid than, say, a ceiling surface such that the smoke generator can be mounted more securely. Preferably, the smoke generator is also mounted close to the ceiling which allows a good distribution of obfuscating gas that can fill the entire room.

The mounting interface may be connectable to a first support unit of a smoke generator that comprises the first mount and separately connectable to a second support unit of a smoke generator that comprises the second mount. That is, the mounting interface may be connectable to two different support units with different mounts (e.g. wall mounts).

Preferably, the mounting interface is located at a first end of the smoke generator module, and the deflector is located at a second end of the smoke generator module opposite to the first end. This configuration is particularly advantageous for a cylindrical smoke generator module with two flat opposing surfaces at the first and second ends. The configuration further allows the smoke generator module to be used with a variety of known pyrotechnic canisters that typically have the gas outlet at a bottom surface.

According to a second aspect, there is provided a method of manufacturing a deflector for a smoke generator, the method comprising: providing a flat metal sheet comprising a slit; and displacing, by a pressing motion, at least partially a portion of the flat sheet adjacent to a first side of the slit in a direction perpendicular to a surface of a surrounding portion of the flat sheet, so as to form a three-dimensional deflector body portion, wherein the deflector body portion defines a channel for obfuscating gas emitted by the smoke generator, wherein the displaced first side of the slit defines an exit of the channel; wherein the pressing motion is a pressing motion in a single pressing direction.

The manufacturing method of the second aspect may be combinable with the deflector of the first aspect, or may be used independently from the first aspect.

The manufacturing method can greatly facilitate manufacture of the deflector, yet still achieve a deflector that is robust and able to withstand the harsh conditions at the outlet of a pyrotechnic cannister.

In embodiments, the deflector body portion is connected to the surrounding plate portion apart from at the displaced first side of the slit.

In one embodiment, the pressing motion forms one or more planar surfaces and/or curved surfaces in the deflector body portion. The pressing motion may additionally form a slanting deflector surface of the deflector body portion against which at least a portion of the obfuscating gas emitted by the smoke generator impinges. The manufacturing method can accordingly be used for a large variety of deflector body shapes, and can be tailored according to the specific requirements of a particular smoke generator. Optionally, the slanting surface is slanting at an angle of 40 to 50 degrees relative to the plate portion.

The deflector may be used in a smoke generator module according to the first aspect.

There is further provided a deflector manufactured by the method according to the second aspect.

According to a third aspect, there is provided a support unit for a smoke generator of an intruder security system, the support unit comprising: a power source or an interface for connection to a power source; activation electronics for transmitting a signal to a pyrotechnical canister for activation thereof; a coupling mechanism for coupling a smoke generator module configured to house the pyrotechnic canister to the support unit; and a lock member configured to engage with the smoke generator module so as to restrict a movement of the smoke generator module relative to the support unit.

The lock member of the support unit allows a smoke generator module to be securely attached to the support unit, and preferably in a predetermined relative position. Furthermore, the lock member can function as a tamper prevention mechanism that greatly reduces the possibility of an unauthorised person tampering with the smoke generator (e.g. by removing the smoke generator module and/or the canister).

It is noted that, although they may contribute to proper functioning of the modular smoke generator and are preferably arranged as defined, the power source, the interface for connection to a power source, and the activation electronics of the support unit are not essential to the invention nor to the definition thereof. In particular, none of the power source, the interface for connection to a power source, and the activation electronics are inextricably linked to the lock member.

Preferably, the lock member comprises a protruding member configured to be moved between a protruding state and a retracted state, wherein the protruding member in the protruding state is configured to engage with the smoke generator module so as to restrict movement of the smoke generator module, and in the retracted state is configured to allow movement of the smoke generator module.

The protruding member may be configured to engage with the smoke generator module by pressing against a wall surface of the smoke generator module. Thus, the protruding member may act as a friction brake and restrict movement of the smoke generator module. Additionally or alternatively, the protruding member may engage in a recess or cut-out of a wall surface of the smoke generator module.

A specific tool may preferably be required to transition the protruding member from the protruding state to the retracted state. Hence, the lock member can prevent the tampering with, or removal of, the smoke generator module. In some embodiments,, the protruding member is configured to engage with a recess in an external wall of the smoke generator module. Such a protruding member may accordingly prevent movement of the smoke generator module.

In one embodiment, the coupling mechanism is a rotational coupling mechanism, and the lock member may be configured to restrict a rotational movement of the smoke generator module relative to the support unit. The lock member can accordingly ensure that the smoke generator module is mounted in the desired rotational orientation.

The support unit may further comprise a wall mount for mounting of the support unit to a wall surface. The wall mount may be one or more of: a wall mount for horizontal mounting of the smoke generator module, and a wall mount for vertical mounting of the smoke generator module.

In a fourth aspect there is provided a smoke generator comprising a support unit according to the third aspect and a smoke generator module for holding a pyrotechnical canister, wherein the smoke generator module comprises a recess in an external surface thereof for engagement with the lock member of the support unit.

Optionally, the smoke generator module is a smoke generator module according to the first aspect.

Optionally, the deflector of the smoke generator module is manufactured by the method according to the second aspect.

In a fifth aspect, there is provided a smoke generator module for a smoke generator of an intruder security system, wherein the smoke generator module comprises a mounting interface connectable to a mount for mounting of the smoke generator, a pyrotechnical canister for generating obfuscation gas in response to an electronic activation signal, and a deflector arranged to deflect the obfuscating gas along a predetermined discharge axis arranged at an angle of between about 40° and about 50°, optionally about 45°, with respect to an (e.g. structural) axis of the smoke generator module and/or of the smoke generator.

The (e.g. structural) axis may be a principal axis of the smoke generator module. Additionally or alternatively, the (e.g. structural) axis may be a longitudinal axis of an elongate shape of the module. Additionally or alternatively, the (e.g. structural) axis may be a central axis of a round (e.g. generally cylindrical) shape of the module.

Such a configuration of smoke generator module can provide a module that maybe used in any of at least two different installation positions or orientations, for example, a generally vertical or upright position, and a generally horizontal or horizontal position. In either position, the smoke generator can provide smoke generation in the same and/or uniform direction, even though the canister is orientated differently in the different installation positions. Such an arrangement can enable the same module to be used in predetermined different orientations without sacrificing gas discharge in one orientation compared to the other. The deflector may be a fixed deflector, or an adjustable deflector.

In a closely related sixth aspect, there is provided a smoke generator module for a smoke generator of an intruder security system, the smoke generator module comprising a pyrotechnic canister for generating obfuscation gas in response to an electronic activation signal, and a deflector fixed with respect to the cannister and arranged to deflect the obfuscation gas along an inclined discharge axis, the smoke generator module being mountable to a mounting surface in either of first and second predetermined installation positions, the first position being a generally upright and/or vertical position, and the second position being a generally lying and/or horizontal position that is generally orthogonal to the first position, the discharge axis being substantially the same with respect to the mounting surface whether in the first position or the second position.

The discharge axis may be inclined downwardly at an angle of between about 40° and about 50° with respect to the mounting surface, optionally about 45°. Additionally or alternatively, the discharge axis may be inclined downwardly at an angle of between about 40° and about 50° with respect to an (e.g. structural) axis of the smoke generator module and/or of the smoke generator. Optionally, the axis may be a longitudinal axis of an elongated shape of the module and/or a central axis of a round (e.g. cylindrical) shape of the module.

References herein to an axis of gas flow (for example, discharge axis) may refer to a principal axis of a jet of gas. In some case, the jet may be diverging or converging with respect to the axis, while the jet still has at least a principal axis associated therewith.

BRI EF DESCRI PTION OF TH E DRAWI NGS

In order to best describe the manner in which the above-described embodiments are implemented, as well as define other advantages and features of the disclosure, a more particular description is provided below and is illustrated in the appended drawings. Understanding that these drawings depict only exemplary embodiments of the invention and are not therefore to be considered to be limiting in scope, the examples will be described and explained with additional specificity and detail through the use of the accompanying drawings in which:

Fig. 1 shows a schematic view of an intruder security system;

Fig. 2a shows a block diagram of a smoke generator according to embodiments;

Fig. 2b shows a schematic view of a smoke generator according to embodiments;

Fig. 3a shows a schematic view of a smoke generator according to embodiments mounted on a wall surface in a vertical mount position;

RECTIFIED SHEET (RULE 91) ISA/EP Fig. 3b shows a schematic view of a smoke generator according to embodiments mounted on a wall surface in a horizontal mount position;

Fig. 4 shows a flowchart of a method of manufacturing a deflector according to embodiments;

Fig. 5 shows schematically a method of manufacturing a deflector according to embodiments; and

Fig. 6 shows schematic views of deflectors according to embodiments; and

Fig. 7 shows schematic views of a smoke generator comprising a lock member according to embodiments.

Further, in the figures like reference characters designate like or corresponding elements or parts throughout the several figures. The first digit in the reference character denotes the first figure in which the corresponding element or part appears.

DETAILED DESCRIPTION

Various embodiments of the disclosed methods and arrangements are discussed in detail below. While specific implementations are discussed, it should be understood that this is done for illustration purposes only. A person skilled in the relevant art will recognize that other components, configurations, and steps may be used without parting from the spirit and scope of the claimed invention.

Hereinafter, certain embodiments will be described more fully with reference to the accompanying drawings. It will be apparent to those skilled in the art that various modifications and variations can be made without departing from the inventive concept. Other embodiments will be apparent to those skilled in the art from consideration of the specification and practice disclosed herein. It is to be understood that elements and materials may be substituted for those illustrated and described herein, parts and processes may be reversed or omitted, certain features may be utilized independently, and embodiments or features of embodiments may be combined, all as would be apparent to the skilled person in the art.

The embodiments herein are provided by way of example so that this disclosure will be thorough and complete, and will fully convey the scope of the inventive concept, and that the claims be construed as encompassing all modifications, equivalents and alternatives of the present inventive concept which are apparent to those skilled in the art to which the inventive concept pertains. If nothing else is stated, different embodiments may be combined with each other.

Fig. 1 shows an intruder security system arranged in premises in the form of a building 100. The intruder security system comprises at least one control unit 102 which may also be referred to as a gateway. The control unit may include a processor and an alarm unit for providing an alarm signal when the security system is set off. The security system may comprise at least one premises perimeter detector 103, such as a first premises perimeter detector 103a and a second premises perimeter detector 103b. The premises perimeter detectors 103 may be presence detectors sensitive to the presence of persons and/or objects, and/or passage detectors sensitive to the passage of persons and/or objects. For example, presence detectors include motion detectors, such as IR-detectors. For example, passage detectors include magnetic sensors arranged at windows 104 and doors, such as an entrance door 105. Other detectors with similar properties can also be included. The security system may further comprise at least one, and preferably a plurality of, premises interior detectors 106, such as a first premises interior detector 106a and a second premises interior detector 106b. The interior detectors may include IR-sensors.

The control unit 102 is connected to the premises perimeter detectors 103, the premises interior detectors 106 and to input means 107, such as a keypad or similar, for arming and disarming the detectors so as to arm and disarm the security system. For example, the control unit 102 is activated and controlled by the input means 107. Alternatively, the control unit 102 may be provided with the input means 22. Alternatively, the input means 107 is a remote device, such as a wireless remote device. In the illustrated embodiment, the input means 107 is arranged in the vicinity of the entrance door 105. Alternatively, the input means 107 is arranged in any suitable location or is a portable device, such as a cell phone. The detectors are, for example, provided with wireless communication means for communicating with the control unit.

In the embodiment shown in Fig. 1 , the control unit 102 is connected to an alarm receiving center 108, such as a remote alarm receiving center. The control unit may be connected to the receiving center by wires, such as a telephone line as indicated in Fig. 1 with a dashed line, or by a wireless telecommunications system such as GSM or other radio frequency systems. The connection also can be through the internet 109. For example, the control unit 102 is provided with communication means for communicating with the remote alarm receiving center 108. Alternatively, the alarm receiving center 108 is located within the premises or within the building 100. In the embodiment shown in Fig. 1 the remote alarm receiving center 108 comprises a web server, a control and communications unit and a database. The web server is an interface for a user to set up and to monitor the alarm system of the building 100. Different settings and information regarding the alarm system and different users of the alarm system are stored in the database. Communication between the user, the alarm system and the remote alarm receiving center 108 is processed through the control and communications unit.

According to embodiments, at least one premises interior detector 106 comprises or is connected to an image capturing means, such as a camera, video camera or any other type of image capturing means. For example, the image capturing means can be activated when the detector 106 is triggered. For example, at least one premises interior detector 106 comprises an image capturing means, which image capturing means is activated by the triggering of the interior detector 106 connected to it, so that the image capturing means is switched on when the interior detector 106 detects an unauthorized intrusion.

In the building 100 there is also provided a smoke generator 101 capable of producing and distributing an obfuscation gas (e.g. opaque smoke) after being initiated and activated by the security system, preferably through the control unit 102. After being activated, the smoke generator 101 will emit smoke that eventually will fill the premises in the building. The smoke generator 101 is preferably located on a wall surface near the ceiling to ensure a good and uniform distribution of obfuscating gas.

Figs. 2a to 2b show a smoke generator 101 according to embodiments. Fig. 2a shows a block diagram of the smoke generator 101. Fig. 2b shows a schematic view of the smoke generator 101. The smoke generator 101 comprises a canister 201 , a smoke generator module 202, and a support unit 203.

The canister 201 is a pyrotechnical component configured to generate obfuscating gas upon activation of the canister 201. The canister 201 may also be referred to as a pyrotechnical canister, and/or an obfuscating gas generating canister. The obfuscation gas generated by the canister 201 is preferably non-toxic and contains only very small amounts of CO and C02.

The obfuscating gas generated by the canister 201 is typically very hot. The gas can therefore scorch adjacent surfaces if they are too close to the gas outlet of the canister 201 . The obfuscating gas can also carry pyrotechnic residues that can mark adjacent surfaces if the hot smoke impinges directly on them. It is accordingly important to ensure that the obfuscating gas does not impinge on adjacent surfaces.

The canister 201 may be a single use canister. Thus, a user may replace the canister 201 after activation of the canister 201 . It is accordingly preferable if the canister 201 is easily accessible, and removable from the smoke generator 101.

The smoke generator module 202 is configured to hold the canister 201. The smoke generator module 202 comprises canister holding means 204. Preferably, the canister holding means 204 comprises a canister housing configured to house, or enclose, the canister 201. Note that for illustrative purposes only one half of the canister housing is shown in Fig. 2b.

The canister housing is preferably conformal to the canister 201. In other words, the canister housing has a similar shape to the canister 201. For example, a cylindrical canister housing may be used for a cylindrical canister 201 as shown in Fig. 2.

The smoke generator module 202 may further comprise a deflector 205 for deflecting the obfuscating gas generated by the canister 201. Preferably, the deflector 205 is arranged to deflect the obfuscating gas away from nearby surfaces such as wall surfaces and/or ceiling surfaces. Thus, it can be ensured that the hot gas generated by the canister 201 does not impinge on adjacent surfaces.

The deflector 205 may be an integral part of the canister housing (or other canister holding means 204). The deflector 205 may alternatively be provided separately from the canister holding means 204. In yet another alternative, the deflector 205 may be provided as an integral part of the canister 201. For example, the deflector

205 may be integrated into the gas outlet of the canister 201 .

The deflector 205 is arranged in fluid communication with the gas outlet of the canister 201 . Preferably, the deflector 205 is arranged at a gas outlet side of the canister 201.

The deflector 205 will be discussed in more detail in relation to Figs. 4 to 6.

The smoke generator module 202 is removably attached to the support unit 203. For example, the smoke generator module 202 may comprise a mounting interface

206 that allows the smoke generator module 202 to be removably connected to the support unit 203. The mounting interface 206 will be described in more detail in relation to the coupling mechanism 208 of the support unit 203.

The support unit 203 may comprise a power source 211 (e.g. one or more batteries), or connection means to a power source 211 (e.g. one or more wires for connection to a socket). The support unit 203 may further comprise activation electronics 210 electronically connectable to the canister 201 for activation thereof (as indicated by the dashed line in Fig. 2a). The support unit 203 may comprise communication means 209 such as a wireless receiver or transceiver for receiving commands from a remote station such as the control unit 102.

The support unit 203 preferably also comprises a coupling mechanism 208 configured to attach the smoke generator module 202 to the support unit 203. The coupling mechanism 208 may be any suitable coupling mechanism that is capable of attaching the smoke generator module 202 to the support unit 203. For example, the coupling mechanism 208 may be one or more of: a screw-threaded coupling mechanism (as shown in Fig. 2b), a snap-fit coupling mechanism, a coupling mechanism comprising one or more latches and/or clips, a bayonet coupling mechanism, a magnetic coupling mechanism, or the like. In preferred embodiments, the coupling mechanism 208 is a rotational coupling mechanism based at least partly on a rotational movement. Examples of a rotational coupling mechanism include a screw- threaded coupling mechanism, and a bayonet coupling mechanism.

The coupling mechanism 208 may interact with the mounting interface 206 of the smoke generator module 202. For example, if the coupling mechanism 208 is a screw-threaded coupling mechanism as shown in Fig. 2b, the coupling mechanism may comprise an external thread on an outer surface of the support unit 203, in combination with a mounting interface 206 that comprises an internal thread on an inner surface of the canister holding means 204 and/or the smoke generator module 202. As an alternative, a screw-threaded coupling mechanism may comprise an internal thread on an internal surface of the support unit combined with a mounting interface 206 that comprises an external thread on outer surface of the canister holding means 204 and/or the smoke generator module 202. As yet another alternative for a screw-threaded coupling mechanism, the support unit 203 may comprise a threaded shaft, while the mounting interface 206 of the smoke generator module 202 comprises a threaded hole.

The coupling mechanism 208 thus allows the smoke generator module 202 to be easily replaceable, for example when the canister 201 is to be replaced. In embodiments, the user may replace the entire smoke generator module 202 rather than replacing merely the canister 201 . The smoke generator module 202 may be configured not to allow user access to the canister 201. Instead, the canister 201 may be accessible only by engineers having the necessary tools to open the module 202.

Preferably, the coupling mechanism 208 is configured such that the smoke generator module 202 attaches to the support unit 203 in at least one predetermined relative position. For example, the coupling mechanism 208 may be configured to attach the smoke generator module 202 to the support unit 203 in at least one predetermined relative rotational position (i.e. at at least one predetermined rotational orientation relative to the support unit 203). Thus, the direction of the obfuscation gas outlet of the smoke generator 101 is predetermined and predictable.

The support unit 203 may further comprise a mount 207, such as a wall mount or a ceiling mount for mounting of the smoke generator 101 to a wall or a ceiling respectively. Preferably the mount 207 is a wall mount because a wall is typically more solid than a ceiling, and so a wall mount may be more secure.

Figs. 3a to 3b show a smoke generator 101 mounted on a wall surface. In Fig. 3a, the support unit 203 comprises a wall mount 207 for mounting of the smoke generator module 202 in a vertical position (also referred to as a vertical mount position). In Fig. 3b, the support unit 203 comprises a wall mount 207 for mounting of the smoke generator module 202 in a horizontal position (also referred to as a horizontal mount position).

The support unit 203 for vertical mounting of the smoke generator module 202 shown in Fig. 3a supports the smoke generator module 202 in a substantially upright, or substantially vertical, orientation. In the upright orientation, the smoke generator module 202 fits compactly against the wall surface, and protrudes from said wall surface by a sufficiently small amount so as not to be an inconvenience. Preferably, the support unit 203, in this vertical configuration, is arranged to support the smoke generator module 202 from above. That is, the smoke generator module 202 is attached in an upper end to the support unit 203, or in other words, the smoke generator module 202 hangs down from the support unit 203. In this vertical configuration, the gas outlet is preferably at the bottom of the smoke generator module 202. In other words, the gas outlet is preferably at an opposing end of the smoke generator module 202 to the mounting interface 206. Thus, the gas is emitted away from the ceiling surface, reducing the risk of scorching, or marking, the ceiling surface.

The support unit 203, in this vertical configuration, may project outwardly from the wall surface and be attached to the wall surface through a wall mounting surface of the support unit 203. The smoke generator module 202 may then be attached to the wall mount 207 at a coupling surface that is generally perpendicular to the wall mounting surface.

The support unit 203, in this vertical configuration, may have a box-like shape, with one box wall being the wall mounting surface, and another box wall being the coupling surface to the smoke generator module 202.

Alternatively, and preferably, the support unit 203 may be L-shaped, with a first arm of the L-shape being a wall mounting portion, and a second arm of the L-shape forming a top portion. The wall mounting portion can be mounted against the wall surface, and can accordingly provide a large wall-contacting surface. The smoke generator module 202 may be attached to the top portion of the support unit 203 and hang from said top portion.

Turning to Fig. 3b, the support unit 203 for horizontal mounting of the smoke generator module 202 shown therein supports the smoke generator module 202 in a substantially horizontal orientation.

In the horizontal orientation, the smoke generator module 202 has a lower top to bottom profile, although it may protrude further from the wall surface compared to in the vertical orientation. A cross-section of the support unit 203, along the wall surface, may have the shape of a square, rectangle, circle, or polygon, or other suitable shape. The support unit 203 may protrude from the wall surface. The support unit 203 may have a wall-mounting surface on a first side, and a coupling surface for the smoke generator module 202 on a second side generally opposite to, and/or parallel with, the wall mounting surface.

In this horizontal configuration, the gas outlet is preferably at an end of the smoke generator module 202 opposite to the end that is attached to the support unit 203. Alternatively, the gas outlet may be provided at a circumferential wall surface of the smoke generator module 202. When mounted in the horizontal orientation, the smoke generator module 202 is preferably orientated such that the obfuscation gas is discharged in a direction away from the ceiling and/or from the wall.

The inventors have realized that it is particularly advantageous for the smoke generator 101 to discharge the obfuscating gas along the same predetermined axis irrespective of how the smoke generator module 202 is mounted. There is therefore provided a smoke generator 101 where the obfuscating gas is discharged at the same predetermined discharge axis for a plurality of mount position of the smoke generator module 202. In other words, the obfuscating gas is discharged along the same predetermined discharge axis when the smoke generator module 202 is mounted in a first mount position (e.g. horizontal mount position) and when the smoke generator module 202 is mounted in a second mount position (e.g. vertical mount position). This is illustrated in Figs. 3a and 3b, where the obfuscating gas is discharged at an angle of a (alpha) relative to the wall surface for both the vertical orientation and the horizontal orientation of the smoke generator module 202.

Although, horizontal and vertical mount positions have been described, and have been shown in Fig. 3, it will be appreciated that the invention is not limited to these particular mount positions. The scope of the invention includes any smoke generator 101 where the direction of the discharged obfuscating gas is the same for two or more different mount positions.

In embodiments, the deflector 205 is configured to ensure that the discharge axis of the obfuscating gas is the same for two or more mount positions of the smoke generator module 202.

In a first set of embodiments, the deflector 205 is a fixed deflector. The fixed deflector is arranged such that a deflecting surface of the deflector 205, on which the obfuscating gas impinges, allows the obfuscating gas to be discharged along the same predetermined axis for two or more mount positions (e.g. at least first and second mount positions) of the smoke generator module 202.

The fixed deflector may be configured to deflect the obfuscating gas along an axis at an angle of between 40 to 50 degrees, and preferably about 45 degrees, relative to a main axis of the smoke generator module 202. The main axis may be a longitudinal axis in the case of an at least partly elongated smoke generator module 202, and/or a central axis in the case of a smoke generator module 202 with a cylindrical or otherwise rounded shape. This ensures that the obfuscating gas is discharged, in both the vertical and horizontal mount positions, along the same axis relative to the wall surface. It can also be ensured that the jet of hot obfuscating gas is kept away from both the wall surface and the ceiling surface in both mount positions.

The fixed deflector ensures that the jet of obfuscating gas exiting the canister 201 in the vertical mount position shown in Fig. 3a, is deflected laterally away from the wall surface at an angle of about 45 degrees. The fixed deflector also ensures that the jet of obfuscating gas exiting the canister 201 in the horizontal mount position shown in Fig. 3b, is deflected downwardly away from the ceiling surface at an angle of about 45 degrees. Thus, the risk of scorching and/or marking the wall and ceiling surfaces can be significantly reduced for both mount positions.

The fixed deflector may comprise a slanting surface for deflecting the obfuscating gas. The slanting surface is preferably slanting at an angle of 40 to 50 degrees, and more preferably at an angle of about 45 degrees, relative to the main axis of the smoke generator module 202.

For a canister 201 that ejects gas along the main axis of the smoke generator module 202, the deflector 205 may accordingly be configured to deflect the obfuscating gas by 40 to 50 degrees, and preferably 45 degrees relative to the direction of the obfuscating gas at the gas outlet of the canister 201.

Although reference has been made to perpendicular mount positions and a predetermined discharge axis at an angle a (alpha) between 40 to 50 degrees relative to the mounting surface, it will be appreciated that embodiments include a fixed deflector arranged to deflect the smoke along other predetermined discharge axes (i.e. at other angles relative to the mounting surface). In such a case, the deflector shape, deflection angle and/or the predetermined discharge axis may be determined in dependence on the desired mount positions. For example, if the second mount position corresponds to a rotation of the smoke generator module by an amount p (beta) relative to the first mount position (around an axis perpendicular to the main axis of the smoke generator module), then the predetermined discharge axis may be determined to be at an angle a (alpha) of about half of (beta). This ensures that the obfuscating gas can be discharged along the same predetermined discharge axis irrespective of whether the smoke generator module is mounted in the first or the second mount position.

In a second set of embodiments, the deflector 205 is moveable. For example, the deflector 205 may be moveable between at least a first deflector position and a second deflector position. The first deflector position may be the deflector position required for deflecting the obfuscating gas along the predetermined discharge axis when the smoke generator module 202 is mounted in a first mount position. The second deflector position may be the deflector position required for deflecting the obfuscating gas along the predetermined discharge axis when the smoke generator module 202 is mounted in a second mount position. The deflector 205 may preferably be arranged such that a user, when mounting the smoke generator module 202, can move the deflector 205 to the relevant deflector position for the particular mount position, so as to ensure that the obfuscating gas is discharged along the predetermined discharge axis. The deflector 205 can accordingly be adapted in dependence on the mount position of the smoke generator module 202.

The deflector 205 may be rotatably movable between the first and second deflector positions. For example, the deflector 205 may be substantially similar to the fixed deflector described above, arranged to deflect the obfuscating gas along an axis at an angle of between 40 to 50 degrees, and preferably about 45 degrees, relative to the main axis of the smoke generator module 202. However, the deflector 205 may be rotatable to allow the user to rotate the deflector 205 so as to ensure that the deflector surface is facing away from the wall and/or ceiling surface and is pointing along the predetermined discharge axis.

Alternatively, or additionally, a slanting surface of the deflector 205 may be movable, such that its slanting angle can be adjusted between first and second slanting angles corresponding to the appropriate deflection angles for the first and second mount positions respectively.

The deflector 205 may alternatively, or additionally, comprise a first slanting surface and a second slanting surface. The first slanting surface may correspond to a deflection surface for the first mount position, and the second slanting surface may correspond to a deflection surface for the second mount position. Thus, a user may move (e.g. rotate) the deflector 205 such that the jet of obfuscating gas impinges on the first slanting surface in the first mount position and on the second slanting surface in the second mount position.

Figs. 4 and 5 show a method of manufacturing a deflector 205 according to embodiments. Fig. 4 shows a flowchart of the manufacturing method, while Figs. 5a to 5c show schematic illustrations of some of the steps of the manufacturing method.

In step 401 , a flat metal sheet 501 is provided. An exemplary flat metal sheet 501 is shown in Fig. 5a. The flat metal sheet 501 is made from a metal that can withstand the hot temperature of the obfuscating gas generated by the canister 201 . The flat metal sheet 501 comprises a slit 502. The slit 502 may be an elongated hole or aperture in the flat metal sheet 501. The shape and size of the slit 502 may be determined in dependence on the desired shape of the resulting deflector 205.

In step 403, a pressure is applied to a portion 503 of the metal sheet immediately adjacent to one side of the slit 502, as shown in Fig. 5b where said portion 503 is indicated by a dashed line. Preferably the pressure is applied by a pressing motion. The pressing motion is preferably a pressing motion in a single pressing direction.

In step 405, said portion 503 is at least partially displaced by the pressing motion. The portion 503 is displaced in a direction perpendicular to a main surface of the (previously) flat metal sheet 501. In other words, the portion 503 adjacent to the one side of the slit 502 is displaced in a direction perpendicular to a main surface of the surrounding portion of the flat metal sheet 501 .

Hence, a three-dimensional deflector body portion 504 is formed by the pressing motion, as shown in Fig. 5c. The deflector body portion 504 defines a channel for the obfuscating gas generated by the canister 201. The displaced side of the slit 502 may define an exit to the channel, and thus a gas outlet for the smoke generator module 202 (when the deflector 205 is used in a smoke generator module 202).

The surrounding portion, which surrounds the displaced portion, may be referred to as a plate portion 505. The plate portion 505 preferably remains substantially flat after the pressing motion has been performed. The deflector body portion 504 is preferably connected to the surrounding plate portion 505 on all sides apart from the side of the displaced slit 502 (i.e. at the exit of the channel).

The deflector body portion 504 may be formed to comprise one or more planar surfaces, one or more curved surfaces, or a combination thereof. Preferably, the pressing motion forms a deflector surface in the deflector body portion 504 against which at least a portion of the obfuscating gas emitted by the smoke generator 101 can impinge. The deflector surface may be a slanting deflector surface that preferably slants at an angle of 40 to 50 degrees, and more preferably about 45 degrees, relative to the plate portion 505.

Hence, a deflector 205 can be manufactured in a cost-efficient manner that can withstand the hot jet of gasses generated by the canister 201 , while also deflecting said jet of gasses in a certain direction in a reliable manner. The method can greatly facilitate manufacturing of a deflector 205, yet still achieve a deflector 205 that is robust and able to withstand the harsh conditions at the outlet of the canister 201.

The above-described manufacturing method may be used to manufacture a deflector 205 for the previously described smoke generator module 202. That is, the method may be used to manufacture a deflector 205 that is capable of deflecting the obfuscating gas along a predetermined discharge axis for two or more mount positions of the smoke generator module 202.

However, it will be appreciated that the described manufacturing method according to embodiments, is not limited to such a deflector 205, and may be used to manufacture or produce other types of deflectors 205 within the scope of the invention.

Fig. 6 shows schematic views of exemplary deflectors 205 according to embodiments. The deflectors may be used in combination with the previously described embodiments of the smoke generator and/or smoke generator module. The deflectors 205 may be manufactured by the method of Figs. 4 and 5, but are not limited to said manufacturing method. In the left-most figures, the flat metal sheets 501 resulting in the respective deflectors 205 are shown indicating the shape of the slits 502, and the portions adjacent to the slits 502 that undergo the pressing motion. In the central figures, the respective resulting deflectors 205 are shown in a top-view. In the right-most figures, the respective resulting deflectors 205 are shown in a sideview.

Fig. 6a shows a deflector 205 with a spoon-like shaped deflector body portion 504. The resulting deflector body portion 504, in this configuration, comprises a curved deflecting surface.

Fig. 6a shows a deflector 205 with a trapezoidal shaped deflector body portion 504. The resulting deflector body portion 504, in this configuration, comprises a planar deflecting surface. Fig. 6a shows a deflector 205 with a deflector body portion 504 comprising a combination of planar and curved surfaces. The resulting deflector body portion 504, in this configuration, comprises a combination of curved and planar deflecting surface.

Although the shown exemplary deflectors 205 are described as a result of the manufacturing method of Figs. 4 and 5, it will be appreciated that embodiments include deflectors 205 formed using any suitable manufacturing method.

Fig. 7 shows a schematic view of a smoke generator 101. A detail view is also shown of a portion of the smoke generator 101 in a disassembled state.

The smoke generator 101 may be substantially similar to the previously described smoke generator 101 , with the addition of a lock member 701 . The lock member 701 is comprised by the support unit 203. The lock member 701 is configured to engage with the smoke generator module 202 so as to restrict, or prevent, a movement of the smoke generator module 202 relative to the support unit 203. The lock member 701 can thus ensure that a position of the smoke generator module 202 relative to the support unit 203 is fixed.

For example, the lock member 701 may restrict, or prevent, a rotational movement of the smoke generator module 202 relative to the support unit 203. This may be particularly advantageous for a support unit 203 with a rotational coupling mechanism 208 because the lock member 701 can ensure that the smoke generator module 202 is mounted in a correct or appropriate rotational position. Thus, the lock member 701 may ensure that the rotational coupling mechanism 208 couples the smoke generator module 202 to the support unit 203 in a predetermined relative rotational position.

The lock member 701 may be provided as part of the coupling mechanism 208. Alternatively, or additionally, the lock member 701 may be provided as part of the wall mount 207 as shown in Fig. 7. For example, the lock member may be a side-acting lock, such as a side-acting rotation lock, engaging with a side surface of the smoke generator module 202 (as shown in Fig. 7).

The lock member 701 is preferably configured to have two states. In a first state, the lock member 701 is engaged to the smoke generator module 202 so as to restrict, or prevent, movement of the smoke generator module 202. In a second state, the lock member 701 is not engaged to the smoke generator module 202 so as to allow movement of the smoke generator module 202.

There may be provided an actuator connected to the lock member. The actuator may be configured to allow transition of the lock member between the first and second states. For example, the actuator may allow a user to transition the lock member between the first and second states. The actuator may be provided on a surface of the wall mount, such as a lower surface of the wall mount (as indicated by the dashed line in Fig. 7), or on a surface of the support unit, that is accessible by a user. The transition from the first state to the second state may require a specific tool (e.g. a screwdriver or the like). In other words, the actuator may require a specific tool. Thus, once a user has put the lock member 701 in the first state (i.e. fixing the smoke generator module 202), the smoke generator module 202 cannot be removed without using the specific tool. Hence, an unauthorised user is not able to easily remove the smoke generator module 202 from the support unit 203. The lock member 701 can accordingly function as a tamper prevention mechanism.

Preferably the lock member 701 comprises a protruding member configured to be moved between a protruding state (i.e. the first state) and a retracted state (i.e. the second state). When the protruding member is in the protruding state, the protruding member is configured to engage with the smoke generator module 202 to restrict, or prevent, movement thereof. When the protruding member is in the retracted state the protruding member is configured to be retracted from engaging with the smoke generator module 202 so as to allow movement of the smoke generator module 202.

In the protruding state, the protruding member may press against a wall surface of the smoke generator module 202 (i.e. the protruding member may act like a friction brake):

Alternatively, or additionally, the protruding member may be configured to engage in a recess 702 or aperture of the wall surface of the smoke generator module 202 (as shown in Fig. 7).

The protruding member may comprise a finger, a lever, or other elongated member that can be moved between the first and second states.

Although, Fig. 7 shows a support unit 203 for vertical mounting of the smoke generator module 202, it will be appreciated that the described lock member 701 is equally applicable to a support unit 203 for a horizontally mounted smoke generator module 202.

It will be appreciated that, although the support unit 203 comprising a lock member 701 has been described in connection with the previously described smoke generator module 202 adapted for mounting in a plurality of mount position, the support unit 203 with the lock member 701 is equally combinable with other smoke generator modules 202.

Throughout this specification, the word “may” is used in a permissive sense (i.e. meaning having the potential to), rather than in the mandatory sense (i.e. meaning must).

Throughout this specification, the words “comprise”, “include”, and variations of the words, such as “comprising” and “comprises”, “including”, “includes”, do not exclude other elements or steps.

As used throughout this specification, the singular forms “a”, “an”, and “the”, include plural referents unless explicitly indicated otherwise. Thus, for example, reference to “an” element includes a combination of two or more elements, notwithstanding use of other terms and phrases for one or more elements, such as “one or more” or “at least one”.

The term “or” is, unless indicated otherwise, non-exclusive, i.e. encompassing both “and” and “or”. For example, the feature “A or B” includes feature “A”, feature “B” and feature “A and B”.

Unless otherwise indicated, statements that one value or action is “based on” and/or “in dependence on” another condition or value or action, encompass both instances in which the condition or value or action is the sole factor and instances where the condition or value or action is one factor among a plurality of factors.

Unless otherwise indicated, statements that “each” instance of some collection have some property should not be read to exclude cases where some otherwise identical or similar members of a larger collection do not have the property, i.e. each does not necessarily mean each and every.

Claims

CLAI MS

1. A smoke generator module for a smoke generator of an intruder security system, wherein the smoke generator module comprises: a mounting interface connectable to a first mount for mounting of the smoke generator module on a mounting surface in a first mount position and separately connectable to a second mount for mounting of the smoke generator module on the mounting surface in a second mount position; canister holding means configured to hold a pyrotechnical canister for generating obfuscating gas; and a deflector arranged to deflect the obfuscating gas along a predetermined discharge axis relative to the mounting surface when the smoke generator module is mounted in the first mount position and along the same predetermined discharge axis relative to the mounting surface when the smoke generator module is mounted in the second mount position.

2. The smoke generator module according to claim 1, wherein the smoke generator module in the first mount position is substantially perpendicular to the smoke generator module in the second mount position, and wherein the deflector is arranged to deflect the obfuscating gas at an angle of 40 to 50 degrees, preferably about 45 degrees, relative to a main axis of the smoke generator module.

3. The smoke generator module according to claim 1 or 2, wherein the smoke generator module in the first mount position is in a substantially vertical orientation, and wherein the smoke generator module in the second mount position is in a substantially horizontal position.

4. The smoke generator module according to any preceding claim, wherein the deflector comprises a slanting surface, wherein the slanting surface is slanting at an angle of 40 to 50 degrees, preferably about 45 degrees, relative to a main axis of the smoke generator module.

5. The smoke generator module according to any preceding claim, wherein the deflector is a moveable deflector configured to be moveable between a first deflector position and a second deflector position.

6. The smoke generator module according to claim 5, wherein a slanting surface of the deflector is movable between a first slanting angle and a second slanting angle.

7. The smoke generator module according to claim 5 or 6, wherein the moveable deflector is rotatable between the first deflector position and the second deflector position.

8. The smoke generator module according to any preceding claim, wherein the mounting surface is a wall surface.

9. The smoke generator module according to any preceding claim, wherein the mounting interface is connectable to a first support unit of the smoke generator that comprises the first mount and separately connectable to a second support unit of the smoke generator that comprises the second mount.

10. The smoke generator module according to any preceding claim, wherein the mounting interface is located at a first end of the smoke generator module, and wherein the deflector is located at a second end of the smoke generator module opposite to the first end.

11 . A method of manufacturing a deflector for a smoke generator, the method comprising: providing a flat metal sheet comprising a slit; and displacing, by a pressing motion, at least partially a portion of the flat sheet adjacent to a first side of the slit in a direction perpendicular to a surface of a surrounding portion of the flat sheet, so as to form a three-dimensional deflector body portion, wherein the deflector body portion defines a channel for obfuscating gas emitted by the smoke generator, wherein the displaced first side of the slit defines an exit of the channel; wherein the pressing motion is a pressing motion in a single pressing direction.

12. The method according to claim 11 , wherein the pressing motion forms one or more planar surfaces and/or curved surfaces in the deflector body portion.

13. The method according to claim 11 or 12, wherein the deflector body portion is connected to a surrounding plate portion apart from at the displaced first side of the slit.

14. The method according any of claim 11 to 13, wherein the pressing motion forms a slanting deflector surface of the deflector body portion against which at least a portion of the obfuscating gas emitted by the smoke generator impinges.

15. The method according to claim 14, wherein the slanting surface is slanting at an angle of 40 to 50 degrees relative to the plate portion.

16. A support unit for a smoke generator of an intruder security system, the support unit comprising: a power source or an interface for connection to a power source; activation electronics for transmitting a signal to a pyrotechnical canister for activation thereof; a coupling mechanism for coupling a smoke generator module configured to house the pyrotechnic canister to the support unit; and a lock member configured to engage with the smoke generator module so as to restrict a movement of the smoke generator module relative to the support unit.

17. The support unit according to claim 16, wherein the lock member comprises a protruding member configured to be moved between a protruding state and a retracted state, wherein the protruding member in the protruding state is configured to engage with the smoke generator module so as to restrict movement of the smoke generator module, and in the retracted state is configured to allow movement of the smoke generator module.

18. The support unit according to claim 17, wherein the protruding member is configured to engage with a recess in an external wall of the smoke generator module.

19. The support unit according to any of claims 16 to 18, wherein the coupling mechanism is a rotational coupling mechanism.

20. The support unit according to any of claims 16 to 19, wherein the lock member is configured to restrict rotational movement of the smoke generator module relative to the support unit.

21 . The support unit according to any of claims 16 to 20, wherein the coupling mechanism is configured to couple the smoke generator module to the support unit in a predetermined relative position, optionally a predetermined relative rotational position.

22. The support unit according to any of claims 16 to 21 , wherein the support unit further comprises a wall mount for mounting of the support unit to a wall surface.

23. The support unit according to claim 22, wherein the wall mount is one or more of: a wall mount for horizontal mounting of the smoke generator module, and a wall mount for vertical mounting of the smoke generator module.

24. A smoke generator comprising a support unit according to any of claims 16 to 23 and a smoke generator module for holding a pyrotechnical canister, wherein the smoke generator module comprises a recess in an external surface thereof for engagement with the lock member of the support unit.

25. A smoke generator according to claim 24, wherein the smoke generator module is a smoke generator module according to any of claims 1 to 10.