Patent ID: 7250875
Filing Date: 2007-07-31
Classification: G08G

Abstract:
1. A transfer switch, operably configured to be connected to a portable electrical power generator, a traffic signal controller and a utility electrical power source, for enabling repeated switching between the portable electrical power generator and the utility electrical power source to provide electrical power to the traffic signal controller, comprising: a housing, having a cavity therewithin and at least a first opening thereto; transfer switch circuitry disposed in the cavity in the housing, the transfer switch circuitry including a power inlet for receiving the power outlet connector of a portable electrical power generator, a switching mechanism for reciprocably switching between at least a first position, enabling power to be supplied from the portable electrical power generator to the traffic signal controller, and a second position, enabling power to be supplied from the utility electrical power source to the traffic signal controller, a first electrical input connection, associated with the switching mechanism, and operably configured to be connected to a utility line power supply, a second electrical input connection, associated with the switching mechanism, and operably connected to the power inlet, and at least one electrical output connection, associated with the switching mechanism, and operably configured to be connected to a traffic signal controller; a lockout device, operably associated with the switching mechanism, for preventing the switching mechanism from being positioned so as to enable power from both the portable electrical power generator and the utility electrical power source from being supplied to the traffic signal controller.