Tandem-differential-piston internal-combustion engine

F - Mech Eng,Light,Heat,Weapons – 02 – B

Patent

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Details

F02B 33/10 (2006.01) F02B 33/16 (2006.01) F02B 41/06 (2006.01) F02B 75/02 (2006.01) F02B 1/04 (2006.01)

Patent

CA 2221157

A system and method communicate signals between a portable unit and a communications system. The portable device communicates with a base unit using inductive coupling. The base unit is further connected to a wider communication system such as a telephone network. Multiple, orthogonally arranged transducers are used in the base unit to provide a more complete magnetic field and to prevent mutual inductance nulls which are otherwise present in a magnetic field. The use of short-range inductive coupling minimizes the power requirements and limits interference with other sources. The inductive coupling may also be used to recharge a battery in the portable device.

L'invention concerne un système et un procédé permettant de transmettre des signaux entre une unité portative et un système de communication. Le dispositif portatif communique avec une unité de base en utilisant un couplage inductif. L'unité de base est en outre reliée à un système de communication plus large, tel qu'un réseau téléphonique. L'unité de base (10) comprend une pluralité de transducteurs avec une disposition orthogonale pour avoir un champ magnétique plus complet et pour empêcher des annulations mutuelles par induction qui autrement apparaîtraient dans le champ magnétique. L'utilisation d'un couplage inductif courte distance minimise la consommation d'énergie et limite les interférences venant d'autres sources. Le couplage inductif peut également être utilisé pour recharger une pile dans le dispositif portatif.

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