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Emergency electric lighting units

阅读:220发布:2023-08-29

专利汇可以提供Emergency electric lighting units专利检索,专利查询,专利分析的服务。并且An electric lighting unit incorporates a main fluorescent lamp which is normally illuminated from an A.C. supply as well as an auxiliary emergency fluorescent lamp which is automatically switched on if the supply should fail. The unit has the usual base which contains not only the auxiliary equipment for the main lamp but also a rechargeable battery, incorporated in an encapsulated unit, and, incorporated in another encapsulated unit, a charger for normally trickle-charging the battery from the A.C. supply, a solid-state inverter, and a solid-state switching device responsive to failure of the A.C. supply to switch on the inverter to illuminate the auxiliary lamp from the battery. The auxiliary lamp is supported by the main lamp.,下面是Emergency electric lighting units专利的具体信息内容。

1. An electric lighting unit comprising; a main fluorescent lamp, means for illuminating said lamp from A.C. supply terminals, auxiliary equipment a base in the form of an elongated box carrying the main lamp and accommodating the auxiliary equipment, said auxiliary equipment comprising, an auxiliary emergency fluorescent lamp, a rechargeable battery, a charger for normally trickle charging the battery from said A.C. supply terminals, a solid-state inverter connected between said battery and said auxiliary lamp, and a solid-state switching device responsive to failure of the A.C. supply to switch on the inverter to illuminate the auxiliary lamp from the battery, said auxiliary lamp being supported by and depending from said main lamp.
2. A lighting unit as claimed in claim 1 in which the rechargeable battery comprises a plurality of cells in the form of a single encapsulated unit.
3. A lighting unit as claimed in claim 1 in which the charger, the inverter and the switching device are incorporated in a single encapsulated unit.
4. A unit as claimed in claim 1 in which the switching device also cuts off the current taken by said inverter with the battery voltage below a predetermined value.
5. A lighting unit as claimed in claim 1 in which the main fluorescent lamp is substantially more powerful than the auxiliary emergency fluorescent lamp.
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