公开(公告)号：US4803605A

公开(公告)日：1989-02-07

申请号：US81655

申请日：1987-08-04

申请人： David R. Schaller ,  El-Sayed Megahed ,  James Neyer ,  Tor Petterson

发明人： David R. Schaller ,  El-Sayed Megahed ,  James Neyer ,  Tor Petterson

IPC分类号： F21L4/00 ,  F21V25/00 ,  F21V33/00 ,  F21L7/00

CPC分类号： F21V23/0414 ,  F21L4/02 ,  F21L4/022 ,  F21S9/022

摘要： A hand-held flashlight has a housing for two independent electrical systems: a primary system and a backup system. Each of the systems includes a light source, a power source and a switching device for selectively connecting a power source to a corresponding light source. The backup system uses high performance components to insure that the flashlight is operational for long time periods. The backup system is actuated only after the the primary system has failed. An indicator announces when the backup system is in operation.

摘要翻译： 手持式手电筒具有两个独立电气系统的外壳：主系统和备用系统。 每个系统包括光源，电源和用于选择性地将电源连接到对应的光源的开关装置。 备份系统使用高性能组件来确保手电筒长时间运行。 仅在主系统发生故障后才启动备份系统。 一个指示器宣布备份系统何时运行。