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Model railroad cattle car sound effects

DC
  • US 5,267,318 A
  • Filed: 09/26/1990
  • Issued: 11/30/1993
  • Est. Priority Date: 09/26/1990
  • Status: Expired due to Term
First Claim
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1. A sound effect system for use in a toy comprising:

  • clock means (21) for providing a system clock signal (CLK);

    a pseudo-random counter (30) coupled to the clock means for providing a random count, so that the random count changes in response to each cycle of the system clock signal;

    sound generating means (FIG.

         6) for generating a selected one at a time of a plurality of predetermined audible voices, each one of said voices corresponding to a respective voice selection number (I0-I2); and

    means (50) for interconnecting the pseudo-random counter and the sound generating means for providing the random count to the sound generating means as the voice selection number so that the voice selection changes in response to each cycle of the system clock signal, thereby changing the voice selection in a random sequence over time without external stimulus.

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