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Optical reading system

  • US 5,708,418 A
  • Filed: 03/12/1996
  • Issued: 01/13/1998
  • Est. Priority Date: 03/28/1995
  • Status: Expired due to Fees
First Claim
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1. An optical reading system comprising:

  • detecting means for detecting movement of a portable optical reading apparatus from a stationary condition; and

    warning means for generating a warning sound when, after it has been detected by said detecting means that the portable optical reading apparatus has been moved, a predetermined operation is not performed within a predetermined time period;

    wherein said predetermined operation involves a plurality of operations which have different degrees of difficulty in relation to time after the lifting movement of the portable optical reading apparatus, said warning means generates a warning sound at a low sound level when, after it has been detected by said detecting means that the portable optical reading apparatus has been moved, none of said plurality of operations has been performed within said predetermined time period, and after the passage of said predetermined time period, said warning means generates a warning sound at a relatively louder sound level when an operation having a relatively high degree of difficulty from among said plurality of operations is not performed.

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