B - Operations – Transporting – 60 – R
Patent
B - Operations, Transporting
60
R
B60R 99/00 (2009.01) B60Q 9/00 (2006.01) G08B 21/02 (2006.01)
Patent
CA 2314063
A school bus safety device provides an engine status line wired to a voltage detection location. The voltage detection location is a point in the electrical system of the school bus which is typically at a high voltage potential when the engine is in operation, and is at the same potential as ground when the engine is turned off. An edge-triggered logic device, such as a flip-flop, receives the engine status line as a clock pulse input. In a typical application, the falling edge of the engine status line causes the output line of the logic device to go high, thereby driving an annunciator, such as a buzzer. Therefore, turning off the engine of the bus causes the buzzer to sound. The driver walks to the rear of the bus and notices if any sleeping children are left on board. A key switch device, located in the back of the bus, is used to send a reset to the logic device, thereby turning off the buzzer. The driver then walks back to the front of the bus, double-checking to see that all children are off the bus.
Fjordbotten Paul
Seaby & Associates
LandOfFree
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