Assembly for monitoring thermal conditions within a helmet

Details Assembly for monitoring thermal conditions within a helmet Assembly for monitoring thermal conditions within a helmet

G - Physics

01

K

340/159

G01K 7/24 (2006.01) A42B 3/04 (2006.01) G01K 3/00 (2006.01)

Patent

CA 2029772

ABSTRACT OF THE INVENTION An assembly is disposed within a helmet for monitoring predetermined thresholds of a thermal condition therein. Such assembly includes at least one thermistor for sensing the status of the thermal condition and a signal comparator for detecting each predetermined threshold. Individual LED's visually indicate when each predetermined threshold is reached, while an audible alarm indicates when a hazardous predetermined threshold is reached. The audible alarm is further utilized to indicate if the battery voltage is under a predetermined threshold which is predicated on the breakdown voltage of a reference diode when a test switch is closed. A temperatute responsive switch is also included to conserve the life of the battery by activating and deactivating the assembly about a predetermined temperature level.

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