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An AC adapter or AC/DC adapter (also called a wall charger, power adapter, power brick, or wall wart) [1] is a type of external power supply, often enclosed in a case similar to an AC plug. [2] AC adapters deliver electric power to devices that lack internal components to draw voltage and power from mains power themselves.
Basket windings are often wound with Litz wire, a thin, multi-strand wire with each strand individually insulated, which further reduces losses.Cotton or fabric insulation is important from a mechanical point of view during the winding process, because a common enameled magnet wire does not provide sufficient surface friction between coil layers to hold the turns at large angles.
This new system accepts various national power plugs and most laptop chargers will function properly at 120 V 60 Hz AC even if sold in 230 V 50 Hz AC markets. Apple offered an EmPower MagSafe power adapter for their MacBook , MacBook Pro , and MacBook Air lines of notebooks, and also included a cigarette lighter socket adapter.
Brackets are used in traditional timber framing, including the support of a jettied floor which can be carved. Magdalene Street, Cambridge, England. Sixteenth century. Brackets can support many architectural items, including a wall, balcony, parapets, eaves, the spring of an arch, beams, pergola roof, window box, or a shelf. The term is also ...
The Defense Base Act (DBA) (ch. 357 of the 77th United States Congress, 55 Stat. 622, enacted August 16, 1941, codified at 42 U.S.C. §§ 1651–1654) is an extension of the federal workers' compensation program that covers longshoremen and harbor workers, the Longshore and Harbor Workers' Compensation Act 33 U.S.C. §§ 901–950.
In the air brake's simplest form, called the straight air system, compressed air pushes on a piston in a cylinder. The piston is connected through mechanical linkage to brake shoes that can rub on the train wheels, using the resulting friction to slow the train. The mechanical linkage can become quite elaborate, as it evenly distributes force ...