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Autonomous power source

  • US 7,009,310 B2
  • Filed: 01/12/2004
  • Issued: 03/07/2006
  • Est. Priority Date: 01/12/2004
  • Status: Expired due to Fees
First Claim
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1. An autonomous power source, comprising:

  • a movable structure;

    a power harvester mounted to said structure such that it moves with said structure, said power harvester comprising;

    a coil,a magnet,a low-friction ferrofluidic bearing in contact with and supporting one of said coil or magnet,said coil, magnet and bearing arranged such that said magnet and said coil move with respect to each other when said structure is in motion such that an electrical current is produced in said coil;

    electronic circuitry;

    an energy storage system connected to power said electronic circuitry; and

    an interface circuit connected to receive said electrical current and to provide energy for storage in said energy storage system;

    wherein said electronic circuitry comprises a sensor and a wireless transmitter which transmits a signal that varies with the output of said sensor.

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