INTRINSICALLY SAFE BATTERY/RADIO INTERLOCK SAFETY FEATURE
Original Publication Date: 1993-Jun-01
Included in the Prior Art Database: 2002-Feb-06
Many safety organizations require that portable radios or communication devices be operated only with cer- tain approved batteries in order to be considered "safe" in hazardous environments. Hazardous environments include areas that are potentially explosive or flamma- ble. Therefore it is highly desirable to warn the radio user if an "unsafe" battery is being utilized. The user would be warned or alerted of this condition by any of the following methods: 1. An audible tone emitted from the radio speaker.