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School bus safety device

  • US 6,259,358 B1
  • Filed: 11/16/1999
  • Issued: 07/10/2001
  • Est. Priority Date: 11/16/1999
  • Status: Expired due to Fees
First Claim
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1. A school bus safety device adapted for use with a school bus having a front portion and a rear portion, and having an electrical system having a voltage detection location wherein a first voltage Potential results when an ignition switch is not in an off position, and wherein a second voltage potential results when the ignition switch is in the off position, the school bus safety device comprising:

  • (A) engine status line means, connected to the voltage detection location of the electrical system of the school bus, for transmitting a status change signal when the engine is turned off, wherein the status chance signal is a voltage transition from the first voltage potential to a second voltage potential;

    (B) logic device means, located in the rear portion of the school bus, having a clock pulse input, an output and a direct clear input, the clock pulse input attached to, and in electrical communication with, the engine status line means, for receiving the status change signal and for turning on the output to a high voltage state in response to the translation of the status change signal from the first voltage potential to the second voltage potential, the logic device means comprising an edge-triggered flip-flop digital switching device;

    (C) an annunciator, driven by the output of the logic device means when the output of the logic device means is in a high voltage state in response to the translation from a first voltage potential to a second voltage potential of the engine status line;

    (D) key switch means, located in the rear portion of the bus and connected to the direct clear input of the logic device means, for resetting the logic device to a state wherein the output does not drive the annunciator; and

    (E) a key, sized for operation of the key switch means, whereby use of the key allows operation of the key switch means, resetting the logic device means to a state wherein the output does not drive the annunciator.

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