CONVERTING A LAMP FOR CONTINUED OPERATION FOLLOWING A LINE CURRENT FAILURE

摘要

A low voltage LED bulb having a base that fits a standard light socket designed to receive a bulb operated at line voltage is installed in a conventional lamp, which is connected by a lamp cord to a rechargeable battery, the charge in which is maintained by a charging circuit. The rechargeable battery can be provided in a module equipped with a receptacle capable of receiving a standard plug designed for line voltage, and in this case, the lamp requires no modification other than the replacement of the standard bulb by the low voltage LED bulb. In another embodiment, the battery and charger are incorporated into the lamp.

主权项

1. A method for converting a lamp having a removable light emitter operable on alternating line current at a voltage exceeding 100 volts to a lamp that continues to emit light in the event of a line current failure, the method comprising:
replacing said light emitter with a substitute light emitter operable on a DC voltage substantially lower than 100 volts; incorporating into said lamp a power supply, having an input and an output, for converting alternating current at a voltage exceeding 100 volts at the input of said power supply to direct current at a low voltage substantially lower than 100 volts and delivering said direct current to the output of said power supply, and a rechargeable battery delivering direct current at a voltage approximately equal to said low voltage, said battery being connected to said output of said power supply and being chargeable by said power supply; connecting the substitute light emitter to said output of said power supply; and connecting the input of said power supply to a source of alternating current at a voltage exceeding 100 volts.