Electrical battery powered torch includes a reserve bulb in the reflector chamber

摘要

The hand held electrical torch is powered by batteries within a cylindrical chamber [3] that is accessible through a screw on cap [4]. At the other end is the reflector chamber [5] in which there is a main bulb [8] in the center. A reserve or back up bulb [17] is located adjacently. The operation is by turning the threaded lens cover.