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Sound generating device

  • US 7,692,554 B2
  • Filed: 02/16/2006
  • Issued: 04/06/2010
  • Est. Priority Date: 02/16/2005
  • Status: Expired due to Fees
First Claim
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1. An invalid apparatus, comprising a sound generating device including a monitoring circuit and an audible output device for outputting an audible indication corresponding to status/condition of one or more parts of the apparatus and/or relative proximity of the apparatus to a user thereof, monitored by the monitoring circuit, the monitoring circuit of the sound generating device having means for determining position and/or the status/condition of one or more parts of the apparatus, wherein the sound generating device outputs an audible indication corresponding to a relative position and/or status/condition of the or each part, the audible indication being outputted upon detection of an approach towards the apparatus before the status/condition of the or each part changes and upon detection of a change in the status/condition of the or each part of the apparatus.

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