Patent ID: 8198995

Claim:
A circuit comprising: a pressure switch configured to selectively couple a power source and an electronically-operated actuator to selectively energize said electronically-operated actuator, said electronically-operated actuator comprising at least one contact set configured to couple said power source to at least one emergency light when said electronically-operated actuator is de-energized, wherein said pressure switch is coupled to a brake and configured to measure a brake pressure level; and a manual reset device coupled to said pressure switch and to said electronically-operated actuator, said manual reset circuit configured to energize said electronically-operated actuator upon receipt of an operator input; wherein said pressure switch comprises a first electrical connection and a second electrical connection, said first electrical connection selectively coupling said power source to said electronically-operated actuator and said second electrical connection selectively coupling said power source to said manual reset device, said pressure switch further configured to: open said first electrical connection when the brake pressure level is less than a first predetermined level and close said second electrical connection when the brake pressure level is less than the first predetermined level, the first predetermined level corresponding to an applied emergency brake; and close said first electrical connection when the brake pressure level is greater than a second predetermined level that corresponds to a non-applied emergency brake.