초록 ▼

A system and method for automatically supplying a flashing line voltage from power stored in an auxiliary battery to power red traffic signal lamps using clusters of light emitting diodes during a blackout condition. A plurality of flash block connectors are pin-to-pin compatible with the flash bloc

A system and method for automatically supplying a flashing line voltage from power stored in an auxiliary battery to power red traffic signal lamps using clusters of light emitting diodes during a blackout condition. A plurality of flash block connectors are pin-to-pin compatible with the flash block jumper blocks of an already installed traffic light control system so that the existing system is retrofitted without any cabinet or field rewiring or any cutting or crimping of the wires.

대표청구항 ▼

[ What is claimed is:] [1.] A retrofit blackout backup system for red traffic signal lights using clusters of light emitting diodes that (i) is compatible with the already installed flash block connectors of a traffic light control system, (ii) does not require any cabinet or field rewiring or any c

[ What is claimed is:] [1.] A retrofit blackout backup system for red traffic signal lights using clusters of light emitting diodes that (i) is compatible with the already installed flash block connectors of a traffic light control system, (ii) does not require any cabinet or field rewiring or any cutting or crimping of wires, and (iii) reduces the current required during a blackout condition, comprising:a plurality of flash block connectors, each of said connectors being pin-to-pin compatible with the flash block jumper blocks of said traffic light control system, said connectors retaining the same jumper wire configuration for the green and yellow traffic lights but with an external connector to the red light traffic pins;a storage battery;an inverter coupled to said storage battery for (i) charging said battery from the AC power line during non-blackout conditions and (ii) generating alternating line voltage from the battery during blackout conditions;a power switch coupled to said inverter;a driver coupled to said power switch for continuously causing said power switch to open and close during a blackout condition; anda first plurality of relay switches respectively connected to said external connector of each of substantially one-half of said flash block connectors and a second plurality of relay switches respectively connected to said external connector of each of the substantially one-half remaining flush block connectors, said relay switches energized by the AC utility line to maintain said jumper wire configuration for the red traffic lights during a non-blackout condition but disconnecting said red traffic light jumper wire configuration and connecting said red traffic light pins to the output of said power switch during a blackout condition, so that the red traffic lights are flashed on and off during a blackout condition from power stored in said storage battery and so that only substantially one-half of said red traffic lights are on at any one time.