1. Field of the Invention
The present invention relates generally to a launcher for projectiles, and particularly to a launcher of multiple less/non-lethal projectiles.
2. Description of the Related Art
In recent years, national governments, international institutions, and law enforcement agencies have put a greater emphasis on the use of less-lethal and/or non-lethal weaponry (hereinafter the term ‘less-lethal’ will encompass both less-lethal and non-lethal). The purpose of such weapons is not to kill, but to incapacitate, or, in some cases, to deter the subject from further approach. Much of the armament within the less-lethal arsenal is for the purposes of riot control and/or crowd dispersal, i.e., situations that typically involve a small group of security personnel attempting to control and/or disperse a large group of combative antagonists who, even if they are not armed with conventional firearms, can still injure and/or kill the security personnel with objects at hand.
The typical weapons deployed to disperse a crowd, such as a tear gas canister either thrown by hand or launched by a launcher, are problematic. For instance, a tear gas canister, after landing among a group of antagonists, may be picked up by an antagonist and then thrown back at the security personnel. Furthermore, if it is desired to saturate a certain area with tear gas, a group of security personnel must synchronize their aiming and firing in order to effectively target the certain area. Thus, even though there may be many different phenomena which require different security personnel's attention in a riot control situation, a group of them must be focused on this one task.
Therefore, there is a need for a launcher of less-lethal munitions, such as tear gas, which makes it difficult for the antagonists to throw the munitions back at the security personnel, allows the security personnel a greater degree of protection from the antagonists, and provides the security personnel greater freedom of movement and action when responding to the antagonists.
A multiple projectile launcher according to the present invention is a system in which a plurality of cartridges are held within a cassette that can be inserted into a locking and priming mechanism in a base of the multiple projectile launcher. Once the cassette is loaded into the locking and priming mechanism, the cartridges in the cassette may be primed by moving the locking and priming mechanism (which is holding the cassette) such that electric igniter contacts in the launcher base are in contact with electric igniters in each cartridge. Once the cassette is locked (thereby priming the plural cartridges held in the cassette), the plural cartridges may be fired singly, severally, and/or all at the same time.
Each cartridge comprises a cartridge case containing propellant and a payload, where one end of the cartridge case has an electrode for connecting the electric igniter contact of the launcher base to the electric igniter in the cartridge. In the presently preferred embodiment, the payload of the cartridges comprise non-lethal and/or less-lethal munitions, such as tear gas grenades, sting-ball grenades, flash-bang rounds, bean bags, etc. Furthermore, in the presently preferred embodiment, each cartridge is inserted into a slot in the cassette in order to form a friction seal with the inner tapered surface of the slot. However, in other embodiments, the cartridges may, for example, be permanently affixed to the cassette, or use a notch-and-detent system to hold the cartridges in the cassette. In addition, the cartridges may contain, for example, lethal payloads and/or pyrotechnics.
There are many benefits and advantages of the multiple projectile launcher according to the present invention, including, but not limited to: (a) the ability to saturate an area, or a multitude of areas, with munitions, (b) the flexibility, provided by electronic fire control, to fire one, several, or all cartridges according to a particular timing pattern, to create a certain effect, (c) the wide variety of possible placements and/or mountings of the launcher (such as on a vehicle, on a turret, on its own movable carriage, or statically mounted to a building), (d) the launcher does not require many people to operate and can, in fact, be operated by one person, and (e) because the cassettes can be pre-loaded with cartridges, and the loading, locking, and priming functions can be performed quickly and efficiently, a small number of security personnel can inundate a crowd of a much greater number of people with munitions in a short period of time with little effort compared to performing the same task with prior art munition launching means, such as individually carried and fired grenade launchers, shotguns, or rifles.
In one aspect, a multiple projectile launcher according to the present invention comprises a modular unit which may be connected with other multiple projectile launching units to effect a desired spread of fire, a desired number of launchable munitions, a desired combination of elevations, or any desired configuration. Each of these modular units would have one bank of cartridges, i.e., one set of contact pads for one set of cartridges held in one cassette (which, in turn, is loaded into one cassette holder appropriately positioned above the contact pads in the launcher base); however, each unit would also have means to securely attach to, and detach from, other units. Moreover, the modular system would comprise other types of units, such as a wedge unit. A wedge unit would be placed between two modular launching units so that one launching unit would have a different elevation than another (or different azimuth, depending on the relative orientation of the configuration to the surrounding environment). In one implementation of this embodiment, fire control would be “plug-n-play”, i.e., the set of electric igniter contacts in a launching modular unit would be able to plug into a fire control system as it is added to the configuration.
For a better understanding of the invention, its operating advantages, and specific objects attained by its use, reference should be had to the drawings and descriptive matter in which there is illustrated and described a presently preferred embodiment of the present invention. It is to be understood, however, that the various features of novelty which characterize the invention are pointed out with particularity in the claims annexed to and forming a part of the disclosure. Furthermore, the drawings are designed solely for purposes of illustration and not as a definition of the limits of the invention, for which reference should also be made to the appended claims. It should be further understood that the drawings are not necessarily drawn to scale and that, unless otherwise indicated, they are merely intended to conceptually illustrate the structures and procedures described herein.
In the drawings:
This detailed description of a multiple projectile launcher according to the presently preferred embodiment is broken into multiple sections, as indicated in the table of contents below. In the first section, the presently preferred embodiment is described in more general terms; in the remaining sections (except the last), the presently preferred embodiment is described in greater detail. The last section describes a modular system based on a multiple projectile launcher as the modular unit.
1. General Overview
As can be seen in FIGS. 1A/1B/1C/2, the multiple projectile launcher has three banks of cartridges, each bank set at a different elevation. Each bank consists of ten cartridges (arrayed in two rows of five) held in a cassette which is loaded into a cassette holding mechanism in the launcher base (the cassette holding mechanism also operates as a locking and priming mechanism, which will be described in greater detail below). The cassettes can not be clearly seen in FIGS. 1A/1B/1C/2 because they are locked in place in the launcher base. In the presently preferred embodiment, there are ten cartridges held in a cassette, but other embodiments may have any number of cartridges, in any pattern (e.g., a rectangular array of three rows of four, a diamond-shaped pattern of six, etc.). In the presently preferred embodiment, the cartridges carry a less-lethal payload, such as tear gas grenades and/or bean bags, but other embodiments may carry any sort of projectile, rocket, or pyrotechnic device as a payload.
In the presently preferred embodiment, the cartridges are loaded into the cassette before the cassette is loaded into the launcher base. The cartridges are loaded into the cassette by inserting each one into a slot in the cassette, where the slot has a tapered inner surface so that an O-ring at the rear of the cartridge forms a friction seal with the inner surface of the slot, thereby holding the cartridge in place. However, other embodiments may use any other means for securely holding the cartridges in the cassette. For example, another embodiment may use a notch-and-detent or clamping system. It is also contemplated that the cassette may be molded from plastic around the cartridges during manufacture, thereby permanently affixing the cartridges in the cassette. In such an embodiment, the contents of the cartridges (e.g., the propellant, igniter, payload, etc.) could be loaded after this step in order to avoid any danger of ignition. Furthermore, the cassette (and the cartridges affixed therein) could be disposed after use, or possibly recycled by the manufacturer (by reloading the cartridges).
Once the cartridges are secured in the cassette, the cassette holding the cartridges is slid into the cassette holding mechanism on the launcher base from the side of the launcher. After firing, the cassette can be removed in the same manner. Thus, the multiple projectile launcher according to the presently preferred embodiment may be quickly and efficiently loaded and reloaded by one person.
Once the cassette holding the cartridges is loaded into the cassette holding mechanism, the cassette holding mechanism moves the cassette into a locked position in the launcher base. The cassette holding mechanism is moved into locking position by turning the lever arm located on the side of the multiple projectile launcher. The three lever arms on the launcher base can be seen in each of FIGS. 1A/1B/1C/2, where all lever arms are in the locked position. Inside the launcher base, as can be seen in
It may be noticed that the launcher in FIGS. 1A/1B/1C differs from the launcher in
These are minor variations in how the lever arm may be implemented in one embodiment of the present invention, and it should be understood that a much greater variety of locking and/or sliding mechanisms is possible when implementing the present invention, i.e., any mechanical or electromechanical means for moving the igniter electrodes of the cartridges into contact with the electric igniter contact pins in the launcher base may be used.
The presently preferred embodiment provides one or more security personnel with an area munition, i.e., a means to saturate one or more areas with multiple ordnance, rather than a point munition, i.e., a means to target one point or area with a single ordnance (e.g., a rifle, a grenade launcher, etc.) In comparison, before the present invention, the coordination and synchronization of a large number of security personnel (each brandishing a smoke grenade, or a grenade launcher) was required to provide the same effect. Furthermore, the presently preferred embodiment may be mounted on a vehicle, as shown in
Although the presently preferred embodiment of the present invention was designed to deal with the particular problem of launching less-lethal ordnance at large groups of people, it should be understood that the present invention is neither limited to the presently preferred embodiment (as indicated by the other exemplary embodiments discussed throughout the specification), nor limited to the problem of saturating crowds with tear gas. In other words, novel and inventive elements of the present invention may have much wider applicability, and some individual features, or combinations of features, of the present invention may be inventive in their own right. For example, the manner in which the cartridge is held in place in the cassette (which will be described in much greater detail below) may have applicability in other contexts, such as the loading and priming of cartridges in firearms. As another example, the manner in which the cartridges are locked and primed by moving the cartridges so that their igniter electrodes touch the igniter contact pins which remain motionless in the launcher base may also have applicability in other contexts, such as pyrotechnics.
As yet another example of the broader applicability of the present invention, consider the two sets of four smoke grenade launching tubes positioned at the front of the military vehicle in
An embodiment of the present invention could comprise a cassette in which four cartridges are held at the approximate azimuths and elevations of the four smoke grenade tubes in
This exemplary embodiment is being described in order to emphasize the wide applicability of the present invention, and no suggestion is being made of the utility and/or economy of this particular exemplary embodiment.
A more concise description of the features of the presently preferred embodiment follows.
2. Orientation of the Banks of Cartridges
The launcher shown in FIGS. 1A/1B/1C/2 has each cartridge bank set at a different elevation. The top bank of cartridges has an elevation of about 30°; the middle bank has an elevation of about 15°; and the bottom bank has an elevation of about 0°. Thus, there are three different target areas at varying distances from the launcher which can be reached by less-lethal ordnance launched from the launcher.
One of the advantages of the three-cartridge-banks-at-three-different-elevations configuration of the presently preferred embodiment shown in FIGS. 1A/1B/1C/2 is its ability to saturate a targeted group of antagonists with ordnance (e.g., tear gas); so much so, in fact, that the antagonists will be unable to pick them all up and throw them back at the security personnel who launched the ordnance. Since the banks of cartridges are set at three different elevations, the launcher may saturate a smaller crowd based on its distance from the launcher by firing only one bank of cartridges, or saturate a larger crowd in three different areas by firing all three banks of cartridges at once. The launcher may also fire off each bank as a crowd is rushing at the vehicle, i.e., the top bank of cartridges (at the highest elevation) first when the crowd is the greatest distance away, the middle bank of cartridges second when the crowd has moved midway to the vehicle, and the bottom bank of cartridges last, when the crowd is in the immediate vicinity of the vehicle. Thus, the three-cartridge-banks-at-three-different-elevations configuration is advantageous not only for a crowd rapidly approaching from a distance or a large crowd occupying all three target areas, but also for the chaotic and abruptly-changing conditions that are typical of many crowd control situations.
Although the presently preferred embodiment has three banks of cartridges at three different elevations, other embodiments may have any configuration, i.e., any number of banks of cartridges, at any elevation, and at any azimuth. The three different cartridge banks of the multiple projectile launcher shown in FIGS. 1A/1B/1C/2 have the same fixed azimuth (i.e., although the vertical direction of fire, or elevation, of the banks are different, the horizontal direction of fire, or azimuth, of the banks are the same). However, the launcher of FIG. 1B/2 can be placed on a rotating turret when mounted on a vehicle, as can be seen in
Similarly, the banks of the multiple projectile launcher according to the presently preferred embodiment have three fixed elevations relative to the launcher base (i.e., the operator can only change the three fixed elevations by tilting the entire launcher forward or backward). However, the launcher in
Furthermore, it is contemplated that, in other embodiments of the present invention, the elevation and/or azimuth of one or more cartridge banks may be adjustable relative to the launcher base. However, such embodiments are likely to be far more complicated than the presently preferred embodiment because of all the additional mechanisms that will be required.
Although more complicated embodiments are possible, the presently preferred embodiment benefits from its relative simplicity. Because the elevations and azimuth of the three cartridge banks are fixed, the manufacture of the launcher base with its cassette holding mechanisms is relatively simple. Furthermore, it is believed that the present orientation of the three banks at elevations of about 30°, about 15°, and about 0° provides optimal fields of fire for launching payloads from a launcher mounted on a vehicle or a raised surface (“raised” in relation to the location of the antagonists).
3. Mounting of the Launcher
As referred to above, the multiple projectile launcher according to the presently preferred embodiment shown in FIGS. 1B/2 is built to be mounted atop a structure, such as a building, a tank, a truck, a car, a guardhouse in a prison, etc. In particular, the presently preferred embodiment is intended for placement on a movable turret or stationary mount on top of a vehicle, as seen in
Although the presently preferred embodiment is intended for a movable turret or a stationary mount on top of a vehicle, a multiple projectile launcher according to the present invention may be mounted in a wide variety of ways. A prototype embodiment was mounted on a unmanned robotic vehicle, where both the vehicle and the launcher can be remotely controlled. Other possible embodiments include: a vehicle roof mount with a trapdoor underneath it so the user could bring the launcher within the truck for reloading (of course, a trapdoor could also be put beside the launcher so that a user could load and reload the launcher from the trapdoor, although this would expose the user to more danger), mounted on a carriage with wheels for manual positioning, and static mounts on or in buildings (e.g., prisons, government buildings, such as embassies or city halls) or emplacements near building or other possible targets of antagonistic crowds. It is contemplated that statically mounted launchers would have maintenance schedules, similar to fire extinguishers, in order to insure the viability of the ordnance and the firing mechanism. As an example of a maintenance schedule, it is also contemplated that the cartridges in statically mounted launchers have a predetermined lifespan, i.e., the cartridges would be replaced, for example, every five years.
4. Fire Control System
In the presently preferred embodiment, the propellant inside of each cartridge is electrically initiated and controlled by a fire control system inside the vehicle. The fire control system is a modified version of a fireworks fire control system and, as such, is very flexible. Please see U.S. Pat. Pub. No. 2003/0116048, which is hereby incorporated by reference, for a discussion of various electric ignition fire control devices (this reference is incorporated with the intention of describing various sorts of electronic firework control systems, and the present invention is in no way, shape, or form, limited by the contents thereof). Using the fire control system, a vehicle-mounted embodiment allows the security personnel within the vehicle to control the firing of each cartridge in the launcher. The operator of the fire control panel can fire one cartridge at a time, all of the cartridges at once, all ten cartridges in a bank (at one elevation), different cartridges with a single bank, different cartridges within all three banks, in different timing patterns, etc. For example, it may be effective, when dealing with a very large crowd which extends from close to the vehicle to fairly far away from the vehicle, to have a ripple timing pattern where each row of five cartridges are fired in sequence starting from the bottom row of the cartridge bank at about 0° elevation and ending at the top row of the cartridge bank at about 30° elevation. Such patterns may be manually performed by the operator or pre-programmed into a processing means (whether hardware, software, firmware, or a mixture thereof) so that an operator need only press one button or switch.
Depending on how the launcher is mounted (and where the operator is located relative to the launcher), the fire control panel may be placed anywhere. The fire control panel may have a wireless link to the rest of the fire control system, thereby allowing the operator equipped with the fire control panel to move freely. In such an embodiment, the fire control panel may be built as a small control device (perhaps with less buttons than a full control panel) which is capable of being easily carried by the operator. Furthermore, it is possible that the fire control system may be integrated into a computer system, e.g., the fire control system being either accessible or controllable through a PDA or laptop computer with which it has a wireless communication link.
Although some exemplary embodiments of a fire control system which may be used with the present invention are discussed herein, it should be noted that it is possible to implement other types of fire control systems in accordance with the present invention. For example, one embodiment of the present invention could use a more rudimentary form of fire control rather than the electronic system described above, or have the fire control system integrated into other control electronics of the vehicle, building, or emplacement to which the launcher is mounted.
It is contemplated that fire control systems in future embodiments may have a mechanism for automatically recognizing the type of ordnance in the cartridge. Thus, in such an embodiment, the operator of the fire control system would be able to determine the types of cartridges loaded into the launcher without having loaded them or even seen them directly. In such an embodiment, the type of ordnance may be indicated on the fire control panel by, for example, different colored lights on a panel or by name and/or icon on a display screen.
5. The Cartridge
Each cartridge is comprised of an electric igniter, propellant, and a payload. The payload in the cartridges of the preferred embodiments of the present invention consist of any less-lethal ordnance capable of being propelled in such a manner, as well as any less-lethal ordnance that is modified so that it may be propelled in such a manner (e.g., tear gas canisters or grenades, sting-balls, flash-bang rounds, bean bags, etc.). Each payload may be comprised of multiple or mixed ordnance, i.e., one cartridge may have multiple tear gas grenades or a combination of tear gas and concussion grenades. Although the payload in the cartridges of the preferred embodiment of the present invention may consist of any less-lethal ordnance, the cartridge payload of other embodiments may have ordnance of a more lethal character.
Furthermore, although the cartridges in the presently preferred embodiment have payloads which are propelled by the ignition of propellant contained in the cartridge, other cartridges may have payloads which are self-propelling (such as rockets) or which do not propel at all, but are intended to ignite and discharge within the cartridge case (such as a smoke grenade when the intention is to surround the launcher with smoke, or to discharge the smoke at antagonists directly adjacent to the launcher).
A cross-section of two cartridges according to the presently preferred embodiment is shown and labeled in
The cartridge case of a cartridge according to the presently preferred embodiment has a roughly cylindrical shape which is relatively simple (and thus economical) to manufacture. As will be seen below, the simple addition of an O-ring to the outer circumference of a rear portion of the cartridge case provides the means for holding the cartridge in place in the cassette as well as a means for forming a seal which protects the parts of the electrical ignition from the environment of the launcher. An earlier embodiment used a rim protruding from the rear portion of the cartridge case; however, the rim did not form a friction seal with the cassette until the cassette was locked in the launcher base, so the cartridges could fall out of a cassette before loading onto the launcher if the cassette was held upside down (or at an angle sufficiently close to upside down). Furthermore, an embodiment with a rim on the cartridge case is more difficult (and thus more expensive) to manufacture, and cannot guarantee as impermeable a seal against the environment as the O-ring.
Other embodiments of the present invention could have the diameter of the cartridge case increase towards the rear of the cartridge case relative to the other portions of the cartridge case such that the rear of the cartridge case would not be able to pass through the slots in the cassette. However, such embodiments would be more difficult (and thus more expensive) to manufacture, would suffer from the same problem as the rimmed cartridges, i.e., falling out of the cassette when the cassette is held at a sufficiently great angle, and could not guarantee as impermeable a seal against the environment as the O-ring.
6. Loading and Priming the Multiple Projectile Launcher
A description of the loading and priming of the multiple projectile launcher according to the presently preferred embodiment follows, with reference to the accompanying drawings.
(A) Loading Cartridges onto Cassettes
Loading the cartridges into the cassette in the presently preferred embodiment is relatively simple: each cassette has ten appropriately shaped holes or slots for cartridges, and each cartridge has a rubber O-ring on its locking end which forms a friction seal with the inner surface of any of the holes or slots in the cartridge.
Besides showing the cross-sections of two cartridges according to the presently preferred embodiment,
As stated above, the cartridges in FIGS. 3A/4A are shown poised to be inserted into the holes or slots in the cassette. In
The O-rings of the cartridges have a larger diameter than the diameter of the loading end of the cassette hole, as can be seen in FIGS. 3B/4B, where the cartridge is resting on top of the cassette hole. However, the O-ring of the cartridge can be forced into the loading end of the cassette hole, if adequate pressure is applied. This process of securely lodging the cartridge into the cassette hole or slot may be performed by pushing the cartridge into the slot with both thumbs, so that the O-ring forms a friction seal with the inner surface of the first section of the cassette hole, can be seen in FIGS. 3C/4C. Thus, in FIGS. 3B/4B, the cartridge is still resting on the outer lip of the cassette hole; in FIGS. 3C/4C, the cartridge has been firmly lodged within the cassette hole.
It should be understood that the present invention is not limited to this technique of cartridge loading/holding, and any technique or technology for holding cartridges in the cassettes may be employed in accordance with the present invention. For example, a notch-and-detent type system where the cassette holes have a notch and the cartridge had a detent (or vice-versa) could be employed. In an earlier embodiment, the cartridges were be clamped onto the cassette, but this was not preferable, for reasons discussed below.
(B) Loading Cassettes onto the Launcher
A cross-section schematic diagram corresponding to
It should be understood that the present invention is not limited to either technique of cassette loading discussed above (i.e., sliding into grooves or clamping directly onto the launcher base), and that any technique or technology for loading cassettes into place on the launcher base may be employed in accordance with the present invention.
(C) Locking/Priming the Cassettes
Once the cassette is fully loaded into the sliding mechanism (as shown in
These are minor variations, and both configurations are possible when implementing the presently preferred embodiment of the present invention, as well as many others (e.g., ground contacts located diagonally from the firing pin; a single ground contact rather than two; the firing pin not located in the center of the contact pad, provided the igniter electrodes on the cartridges are also appropriately moved; etc.). Furthermore, it should be understood that a much greater range of contact pads and contact pad configurations are possible when implementing other embodiments of the present invention, including replacing the contact pads completely with another mechanism.
The contact pads in
When the sliding mechanism is locked into place, firmly engaging the cassette and the cartridges therein, each electric initiator pin is placed in direct contact with its corresponding igniter electrode, thereby priming each cartridge, as will be described below in reference to FIGS. 10A/10B/11.
In
It is believed that the priming mechanism of the presently preferred embodiment of the present invention is unique in that the initiator pin is set into the base, and thus remains still, while the cartridge (with its igniter electrode) is moved in position in order to be primed. In most systems, it is the cartridge that remains still while the initiator is moved in order to prime the cartridge.
Furthermore, the locking/priming system according to the presently preferred embodiment of the present invention effectively forms a water-tight seal when locked so that, if the launcher is outside and exposed to the weather, no water can leak in and short the electrical initiating mechanism.
Although the locking/priming technique has been discussed in terms of the presently preferred embodiment, it should be understood that the present invention is not limited to this technique of locking/priming, and that any technique or technology for locking the cassettes into place and priming them may be employed in accordance with the present invention. For instance, an embodiment is contemplated in which a motorized mechanism, when prompted by the operator, automatically locks and primes the cassettes, thereby replacing the lever arms.
7. Modular Launcher System
In one embodiment, a multiple projectile launcher according to the present invention comprises a modular unit with a single bank of cartridges, i.e., one set of contact pads for one set of cartridges held in one cassette (which, in turn, is loaded into one cassette holder appropriately positioned above the contact pads in the launcher base). This modular launcher unit may be detachably yet securely attached to other modular launcher units to create a larger multiple projectile device having banks with various elevations and/or azimuths. In this manner, the modular launcher units may be connected together to effect a desired spread of fire, a desired number of launchable munitions, a desired combination of elevations, or any desired configuration. The detachably attaching means could comprise any means known to one skilled in the art, from screws, bolts, and locking nuts, to male-female pair locking assemblages mounted on the sides, top, and/or bottom. Moreover, the modular system would have other types of units besides launcher units, such as a wedge unit, which would be placed between two modular launching unit so that one launching unit would have a different elevation than another (or different azimuth, depending on the relative orientation of the configuration to the surrounding environment). In one implementation of this embodiment, fire control would be “plug-n-play”, i.e., the set of electrical connections to the electric igniter contacts in the launching modular unit would be able to plug into a fire control system as it is added to the configuration.
While there have shown and described and pointed out fundamental novel features of the invention as applied to a presently preferred embodiment thereof, it will be understood that various omissions and substitutions and changes in the form and details of the components illustrated, and in their operation, may be made by those skilled in the art without departing from the spirit of the invention. For example, it is expressly intended that all combinations of those elements and/or method steps which perform substantially the same function in substantially the same way to achieve the same results are within the scope of the invention. Moreover, it should be recognized that structures and/or elements and/or method steps shown and/or described in connection with any disclosed form or embodiment of the invention may be incorporated in any other disclosed or described or suggested form or embodiment as a general matter of design choice. It is the intention, therefore, to be limited only as indicated by the scope of the claims appended hereto.
This application claims priority under 35 U.S.C. §119(e) from U.S. Provisional Patent Application Ser. No. 60/509,151 which was filed on Oct. 7, 2003, and which is hereby incorporated by reference in its entirety.
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