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Safety high speed electric toy vehicle

  • US 5,951,362 A
  • Filed: 06/20/1997
  • Issued: 09/14/1999
  • Est. Priority Date: 06/20/1997
  • Status: Expired due to Fees
First Claim
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1. A toy vehicle having an electric motor with a rotary shaft for driving said vehicle, comprising a motion tag, a motion sensor and a motion detection device, whereinsaid motion tag comprises a permanent magnet attached to a gear disc of a transmission system of said vehicle and is movable in response to rotation of said rotary shaft,said motion sensor comprises a plurality of coils adapted for non-contact detection of motion of said motion tag and generates a characteristic electrical signal output in response to movement of said motion tag, andsaid motion detection device accepts and processes said characteristic electrical signal output from said motion sensor and is adapted to trigger cut-off of power supply to said electric motor when said characteristic output signal indicates that there has been no relative motion between the motion tag and the motion sensor for a predetermined duration.

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