US Patent 7341361 Auxiliary light source for self-contained breathing masks

An auxiliary light source includes a plurality of illuminable light-emitting sources and a plurality of opaque reflectors. A plurality of substantially rectangular transparent lenses are positioned over the light-emitting sources. Each lens includes a plurality of integrally disposed finger portions defining mounting brackets engageable with the mask support rim. The device further includes a central panel secured to the mask support rim by a fastening member and a plurality of flexible rubber seals sandwiched between the panel and the lenses respectively. A control switch and a power supply source are electrically coupled thereto and to the light-emitting sources respectively.