Inductive charging – Mortar Pump EZJ manufacturer – Sump Pump EVM manufacturer

Advantages Inductive charging carries a far lower risk of electrical shock, when compared with conductive charging, because there are no exposed conductors. The ability to fully enclose the charging connection also makes the approach attractive where water impermeability is required; for instance, inductive charging is used for implanted medical devices that require periodic or even constant external power, and for electric hygiene devices, such as toothbrushes and shavers, that are frequently used near or even in water. Inductive charging makes charging mobile devices more convenient; rather than having to connect a power cable, the device can be placed on a charge plate. Disadvantages One disadvantage of inductive charging is its lower efficiency and increased ohmic (resistive) heating in comparison to direct contact. Implementations using lower frequencies or older drive technologies charge more slowly and generate heat for most portable electronics,[citation needed]; the technology is nonetheless commonly used in some electric toothbrushes and wet/dry electric shavers, partly for the advantage that the battery contacts can be completely sealed to prevent exposure to water. Inductive charging also requires drive electronics and coils that increase manufacturing complexity and cost. Newer approaches diminish the transfer losses with ultra thin coils, higher frequencies and optimized drive electronics, thus providing chargers and receivers that are compact, efficient[citation needed] and can be integrated into mobile devices or batteries with minimal change. These technologies provide charging time that are the same as wired approaches and are finding their way into mobile devices rapidly. The Magne Charge system used in the GM EV-1, Chevy S-10 EV and Toyota RAV4 EV vehicles employed high-frequency induction to deliver high power at an efficiency of 86% (6.6kW power delivery from a 7.68kW power draw). Examples Transcutaneous energy transfer (TET) systems in artificial hearts and other surgically implanted devices. General Motors’ (GM) discontinued EV-1 electric car was charged with an inductive charging paddle, which was inserted into a receptacle on the vehicle. GM and Toyota agreed on a standard inductive charging interface developed by Hughes Electronics for GM called Magne Charge. GM later dropped its support in 2002 when the California Air Resources Board selected the SAE J1772, or “Avcon”, conductive charging interface for electric vehicles in California. In 2006, researchers at the Massachusetts Institute of Technology reported that they had discovered an efficient way to transfer power between coils separated by a few meters. The team, led by Marin Soljai, theorized that they could extend the distance between the coils by adding resonance to the equation. The MIT wireless power project, called WiTricity, uses a curved coil and capacitive plates. April 28, 2009: An Energizer inductive charging station for the Wii remote is reported on IGN. At CES in January 2009, Palm, Inc. announced their new Pre smartphone would be available with an inductive charger, though the charger itself will be sold as a separate accessory. The charger is known as the “Touchstone”, and a special backplate must be fitted to the Pre in order to be compatible with it. In August 2009 A Consortium of interested companies called the Wireless Power Consortium announced they were nearing completion for a new industry standard for low-power Inductive charging See also Charging station In-road electric vehicle charger Resonant energy transfer Environmental technology References ^ a b “How can an electric toothbrush recharge its batteries when there are no metal contacts between the toothbrush and the base?” (Commercial website). HowStuffWorks, Inc., via howstuffworks.com. Retrieved on 2007-08-23. ^ a b US patent 6972543 “Series resonant inductive charging circuit” ^ a b c David Pogue (2009-06-03). “Another Pre Innovation: The Touchstone Charging Stand”. NYTimes.com. http://pogue.blogs.nytimes.com/2009/06/03/another-pre-innovation-the-touchstone-charging-stand/?ref=personaltech. Retrieved 2009-10-15.  ^ “Non-contact Charging System Simultaneously Charges Multiple Mobile Devices” ^ WM7200 Inductive Charger Owner Manual. GM Advanced Technology Vehicles, Torrance, California 90509-2923, 1-800-482-6644. 1998. p. 15. http://www.evchargernews.com/miscfiles/gm atv wm7200 owners manual.pdf. Retrieved 2009-10-15.  ^ “GM Pulls the Plug on Inductive Charging: Letter from General Motors Advanced Technology Vehicles”. EV1 Club. 2002-03-15. http://ev1-club.power.net/archive/020315/index.htm. Retrieved 2007-08-23.  ^ Hadley, Franklin (2007-06-07). “Goodbye wires”. MIT News. Massachusetts Institute of Technology. http://web.mit.edu/newsoffice/2007/wireless-0607.html. Retrieved 2007-08-23.  MIT team experimentally demonstrates wireless power transfer, potentially useful for powering laptops, cell phones without cords. ^ Castelvecchi, Davide (2006-11-15). “Wireless energy may power electronics: Dead cell phone inspired research innovation” (pdf). TechTalk (Massachusetts Institute of Technology) 51 (9). http://web.mit.edu/newsoffice/2006/techtalk51-9.pdf. Retrieved 2007-08-23.  ^ “Energizer Induction Charger for Wii Preview”. IGN.com. 2009-04-28. http://gear.ign.com/articles/977/977418p1.html.  ^ Miller, Paul (2009-01-08). “Palm Pre’s wireless charger, the Touchstone”. Engadget. http://www.engadget.com/2009/01/08/palm-pres-wireless-charger.  ^ “wireless electricity specification nearing completion”. PCWorld. 2009-08-18. http://www.pcworld.com/article/170360/wireless_electricity_specification_nearing_completion.html?loomia_ow=t0:s0:a41:g2:r18:c0.016236:b27254916:z0. Retrieved 2009-08-21.  External links How Inductors Work How Electric Toothbrushes Recharge Using Inductors Inductive Charging Wireless Electricity Is Here Categories: Electronics terms | Inductive chargingHidden categories: NPOV disputes from October 2009 | All NPOV disputes | All articles with unsourced statements | Articles with unsourced statements from August 2007

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Peninsula of Lies: A True Story of Mysterious Birth and Taboo Love


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Peninsula of Lies is nonfiction mystery, set in a haunting gothic locale and peopled by fascinating and eccentric characters. Its hero and heroine is Dawn Langley Simmons, a British writer who lived in Charleston, South Carolina, during the 1960s and became the center of one of the most unusual sexual scandals.
Born in England, Dawn began life as a boy named Gordon Langley Hall, the son of servants at Sissinghurst Castle, the estate of Vita Sackville-West. In his twenties he made his way to New York, where he wrote about and befriended great society ladies. A small fortune inherited from Isabel Whitney allowed him to buy and decorate a mansion in Charleston. But Gordon's world changed in 1968 when at The Johns Hopkins Hospital he underwent one of the first sexual reassignment surgeries, scandalizing the Southern community that had welcomed him. Months later Gordon shocked Charleston again. Gordon -- now Dawn -- married a young black mechanic, soon appeared to be pregnant, and shortly thereafter became the mother of a young girl.
National Book Award-winning author Edward Ball has written a detective story that unwraps Dawn's many mysteries. The result is an engrossing narrative of a person who tested every taboo, as well as the confidence of observers in their own eyes.

Amazon.com Review
It would take quite a story to live up to the melodramatic title of Edward Ball's Peninsula of Lies: A True Story of Mysterious Birth and Taboo Love. Fortunately for the reader, the bizarre and highly compelling tale of Gordon Langley Hall and his transformation into Dawn Langley Hall is quite a story indeed. Novelists couldn't have dreamed up a more fascinating central character than Hall. Born the son of British servants, Hall, as a boy, befriended Virginia Woolf and her lover Vita Sackville-West. As a young man, he made his way to New York, becoming a biographer of some society figures and endearing himself to others including heiress Isabel Whitney who left him an inheritance that allowed him to move to Charleston, South Carolina, and gain entry to the colorful world of Southern society. In 1968, Hall underwent a sex change operation, claiming that the procedure was corrective and that she had actually possessed female sexual organs all along. Further complicating matters for the people of Charleston was Dawn's marriage to a young black mechanic and the appearance of an infant daughter. Author Edward Ball (Slaves in the Family) first came into contact with Hall through a uncover more about her. Although it is a biography of Hall, Peninsula of Lies is also equal parts mystery as Ball tracks down key figures from Hall's life, attempts to separate truth from legend and find the points at which the two intersect. As the facts of her life are brought into the light, Hall's psychology and motivation become more inscrutable and we are left with more questions than answers. Edward Ball's investigative persistence is tempered by a kindness toward his interview subjects, which, combined with his rich descriptions of 1960s Southern living, make Peninsula of Lies a lively read. But it is the impression left by the enigmatic Dawn Langley Hall that is sure to linger after the book is over. --John Moe

Price: $16.26
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Prison Profiteers: Who Makes Money from Mass Incarceration


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In Prison Profiteers, co-editors Tara Herivel and Paul Wright "follow the money to an astonishing constellation of prison administrators and politicians working in collusion with private parties to maximize profits" (Publishers Weekly). From investment banks, guard unions, and the makers of Taser stun guns to health care providers, telephone companies, and the U.S. military (which relies heavily on prison labor), this network of perversely motivated interests has turned the imprisonment of one out of every 135 Americans into a lucrative business.

Called "an essential read for anyone who wants to understand what’s gone wrong with criminal justice in the United States" by ACLU National Prison Project director Elizabeth Alexander, this incisive and deftly researched volume shows how billions of tax dollars designated for the public good end up lining the pockets of those private enterprises dedicated to keeping prisons packed.

"An important analysis of a troubling social trend" (Booklist) that is sure to inform and outrage any concerned citizen, Prison Profiteers reframes the conversation by exposing those who stand to profit from the imprisonment of millions of Americans.

Price: $9.96
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