Apparatus for operating a school bus safety device

Details Apparatus for operating a school bus safety device Apparatus for operating a school bus safety device

1993-01-28

1995-04-11

Peng, John K.

Communications: electrical

Land vehicle alarms or indicators

For school bus

3404255, 340480, 340487, 116 28R, 116 63R, 318434, G08B 522

Patent

active

054062500

ABSTRACT:
A stop sign and/or crossing arm deployment system is secured to a side and/or the front, respectively of a school bus for deploying a safety stop sign and/or crossing arm between a retracted normal state and a deployed safety state. A dual power circuit is provided for providing maximum power at the instance of deployment and at the instance of final retraction. Otherwise, a lower power is used to operate a bi-directional DC motor which receives power for the entire time period between deploying and retracting the system. The system provides the lower power level while simultaneously heating the circuitry including the motor for use in cold climates. A single ground switch is used for coupling the motor directly to ground both during the deployed state and retracted state to provide maximum power in momentary cycle times to the motor. A voltage, in the reverse retraction direction of the motor, is applied to the system at all times to immediately commence the retraction portion of the cycle during deployment should the system be deployed and that decision is followed by a decision to cancel such deployment.

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patent: 4983949 (1991-01-01), Wicker
patent: 5036307 (1991-07-01), Reavell et al.
patent: 5038136 (1991-08-01), Watson

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