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On Wed, 17 Oct 2007 14:36:07 -0500, "Gig 601XL Builder"
wrDOTgiaconaATsuddenlink.net wrote in : Larry Dighera wrote: Mace? Wrestle him to the floor? A net? Something with less lethal potential than 100,000 volts? 50,000 Volts, 18 Watts and 133 MilliAmps Where did you get that information? Given W=EI if the voltage is 50KV and the current is 0.133 amps that works out to: 50,000 volts * 0.133 amps = 6,650 Watts (One milliamperes = 0.001 amperes; did you mean microamperes?) The second paragraph of the citation below seems to disagree with your numbers: http://en.wikipedia.org/wiki/Electroshock_gun Principles of operation Electroshock weapon technology uses a temporary high-voltage low-current electrical discharge to override the body's muscle-triggering mechanisms. The recipient feels great pain, and can be momentarily paralyzed while an electric current is being applied. It is reported that applying electroshock devices to more sensitive parts of the body is more painful.[citation needed] The relatively low electric current must be pushed by high voltage to overcome the electrical resistance of the human body. The resulting 'shock' is caused by muscles twitching uncontrollably, appearing as muscle spasms. However, because the amount of current is relatively low, there is considered to be a 'margin' of safety by a number of medical experts. Experts generally agree that this margin is highly dependent on the overall health of the person subjected to the shock. Usually, the higher the voltage, the more effective it is. It may take several seconds to subdue a subject with 100 kV, but only about a second with 1 MV (1,000 kV).[verification needed] In current electroshock weapon models, the current is sometimes relatively low (2.1 mA to 3.6 mA) which is based in part on the electrical supply, (but for example M-26 Taser models produce a peak current of 18 amperes in pulses that last for around 10 microseconds [1] and use eight AA batteries). Electrical current above 10 mA at 60Hz AC is considered to be potentially lethal to humans, though not all electroshock weapons pulse the current at 60 Hz. The internal circuits of most electroshock weapons are fairly simple, either based on an oscillator, resonant circuit and step-up transformer or diode-capacitor voltage multipliers to achieve the continuous, direct or alternating high-voltage discharge may be powered by one or more 9 V battery depending on manufacturer, and model. The output voltages without external "load" (which would be the target's body) are claimed to be in the range of 50 kV up to 1000 kV, with the most common being in the 200 to 300 kV range. However since air has a dielectric breakdown (Emax) of 3000 kV/m, it is clear that the spacing of the electrodes will not permit the upper range of claimed voltages (900 kV representing a minimum electrode spacing of about 30 cm). The output current upon contact with the target will depend on various factors such as target's resistance, skin type, moisture, bodily salinity, clothing, the electroshock weapon's internal circuitry and battery conditions.[2][3] According to the many sources, a shock of half a second duration will cause intense pain and muscle contractions startling most people greatly. Two to three seconds will often cause the subject to become dazed and drop to the ground, and over three seconds will usually completely disorient and drop an attacker for at least several seconds and possibly for up to fifteen minutes.[citation needed] TASER International warns law enforcement agencies that “prolonged or continuous exposure(s) to the TASER device’s electrical charge” may lead to medical risks such as cumulative exhaustion and breathing impairment.[4] Because there is no automatic stop on a taser gun, many officers have used it repeatedly or for a prolonged period of time, thus potentially contributing to suspects’ injuries or death.[5][6] Taser The M-26 TASER, the United States military version of a commercial TASER.The name Taser is an acronym for "Thomas A. Swift's Electric Rifle"[10]. Arizona inventor Jack Cover designed it in 1969; naming it for the science fiction teenage inventor and adventurer character Tom Swift. Modern taser-type weapons fire small dart-like electrodes with attached metal wires that connect to the gun, propelled by small gas charges similar to some air rifle propellants. The maximum range is up to 10 meters (30 feet). Earlier models of Taser needed the dart-like electrodes to embed in the skin and superficial muscle tissues layers; newer versions of the projectiles use a shaped pulse/arc of electricity which disrupt nerve and muscle function without needing the metal prongs on the projectile to penetrate the skin. Early models had difficulty in penetrating thick clothing, but the 'pulse' models are designed to bring down a subject wearing up to a Level III body armor vest.[citation needed] Tasers are currently in use by a number of police forces worldwide to try to reduce firearms-related deaths. The Phoenix Police Department reported that officer shootings had dropped as a result from the use of TASER technology as an alternative to deadly force[citation needed]. Uses of a TASER device in this department increased from 71 in the year 2002 to 164 in the year 2003. Additionally, the number of officer-involved shootings decreased by 7 during this time period. In Houston, however, police shootings did not decline after the deployment of thousands of TASERs.[11] Although TASERs were originally proposed as alternatives to lethal force, they have entered routine use as a method to gain compliance at times when the use of firearms would not be considered. For example, in the case of Fouad Kaady, a severely burned man in shock and covered in blood sitting Indian style in the road was ordered to lie down on his stomach to be handcuffed, and within a few seconds was TASERed twice for failing to comply.[12][13] An inquiry found that officers acted appropriately in this case. In another well-publicized case, Andrew Meyer was tasered while allegedly resisting arrest in an incident which began with him exceeding his allotted time while asking a question of John Kerry at a political rally.[14] While they are not technically considered lethal, some authorities and non-governmental organizations question both the degree of safety presented by the weapon and the ethical implications of using a weapon that some, such as Amnesty International, allege is inhumane. As a result, a number of civil liberties groups would like to see tasers banned.[citation needed] Amnesty International has documented over 245 deaths that occurred after the use of tasers.[15] The fact that a death occurred following use of a taser does not necessarily indicate the taser was the cause of death or even a contributing factor because correlation does not imply causation, and as many of the deaths occurred in people with serious medical conditions and/or severe drug intoxication, often to the point of excited delirium. Tasers are often used as an alternative to attacking the suspect with a baton or shooting him with firearms both of which have a much higher chance of serious injury and death than the taser, even using the highest estimates of possible taser-related deaths. The term "less-lethal" is being used more frequently when referring to weapons such as tasers because many experts feel that no device meant to subdue a person can be completely safe. The less-lethal category also includes devices such as pepper spray, tear gas, and batons.There has been one case report in the medical literature of a person suffering spinal fractures after being shocked by a taser.[16] The US National Institute of Justice has begun a two-year study into taser-related deaths in custody.[17] Tasers were introduced as a less-lethal weapon so that they could be used by police to subdue fleeing, belligerent or potentially dangerous criminal suspects, often when a lethal weapon would have otherwise been used. However, tasers have not proved to unequivocally reduce gun usage. For example, the Houston Police Department has “shot, wounded and killed as many people as before the widespread use of the stun guns” and has used tasers in situations that would not warrant lethal or violent force, such as verbal aggression.[11] On Tuesday, 5 July, 2005 Michael Todd, Chief Constable of Manchester, England, let himself be shot in the back with a taser, to demonstrate his confidence that tasers can be used safely. This was videoed, and the video was released to the BBC on 17 May 2007. He was wearing a shirt and no jacket. When tased he fell forward on his chest on the ground, and (he said afterwards) the shock made him helpless; but soon after he recovered completely.[18][19][20] Although some police volunteers have shown tasers to function appropriately on a healthy, calm individual, the real-life target of a taser is, if not mentally or physically unsound, in a state of high stress. According to the UK’s Defence Scientific Advisory Council’s subcommittee on the Medical Implications of Less-lethal Weapons (DoMILL), “The possibility that other factors such as illicit drug intoxication, alcohol abuse, pre-existing heart disease and cardioactive therapeutic drugs may modify the threshold for generation of cardiac arrhythmias cannot be excluded.” Additionally, taser experiments “do not take into account real life use of tasers by law enforcement agencies, such as repeated or prolonged shocks and the use of restraints”.[5] |
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