Abstract: 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.

Abstract: 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.

Abstract: 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.

Abstract: In a clock synchronization system, clocks on a local area network are synchronized to a standard time signal such as the Network Time Protocol (NTP) signal or the Global Positioning System (GPS) time signal. A terminal on the network enables a user to introduce an offset to the clocks individually so that clocks can display the time in different time zones.

Abstract: A line current power supply delivers operating current to a clock designed to be powered by a conventional electrochemical cell disposed in a power source compartment within the clock housing, and at the same time supplies recharging current to a rechargeable electrochemical cell for powering the clock in the absence of an external power supply. The rechargeable cell is contained within a cylindrical enclosure having a shape such that it can fit into the power source compartment of the clock, and having contacts allowing it to be substituted for the conventional electrochemical power source.

Abstract: 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.

Abstract: A line current power supply delivers operating current to a clock designed to be powered by a conventional electrochemical cell disposed in a power source compartment within the clock housing, and at the same time supplies recharging current to a rechargeable electrochemical cell for powering the clock in the absence of an external power supply. The rechargeable cell is contained within a cylindrical enclosure having a shape such that it can fit into the power source compartment of the clock, and having contacts allowing it to be substituted for the conventional electrochemical power source.

Abstract: In a clock synchronization system, clocks on a local area network are synchronized to a standard time signal such as the Network Time Protocol (NTP) signal or the Global Positioning System (GPS) time signal. A terminal on the network enables a user to introduce an offset to the clocks individually so that clocks can display the time in different time zones.