Apparatus for removing condensate from a sealed face visor and for indicating a dangerous environmental temperature

摘要

A face mask used by a firefighter and/or miner includes a seal between the mask interior surfaces and skin on the face of a user. A port on the sealed visor receives a hose for supplying a regulated amount of air from a compression air tank carried by the user. A portion of the mask in the form of a visor covering the eyes of the user is transparent to visible optical energy. The mask has a tendency while used to have condensate formed thereon, causing the transparent portion to be fogged. An electrically activated device in the form of a heater and/or fan, on the mask prevents formation of and/or removes the condensate. A battery in a housing carried by the user activates the electrically activated device. The housing includes heat insulation to prevent the battery from being damaged by high temperatures in the vicinity of the user. The power supply for the transparent visor energizes a temperature sensor for enabling a firefighter to be warned that he/she is in an unsafe, excessively hot environment, i.e. a temperature of 125 degrees Fahrenheit or greater.