Accession Number : AD0653996

Title :   FIBERCELL OVERHEAT HAZARD DETECTION SYSTEM.

Descriptive Note : Rept. for Jan 66-Jan 67,

Corporate Author : WHITTAKER CORP SAN DIEGO CALIF NARMCO RESEARCH AND DEVELOPMENT DIV

Personal Author(s) : Yalof,Stanley

Report Date : FEB 1967

Pagination or Media Count : 46

Abstract : The purpose of the program was the development of an airborne overheat hazard detection system, utilizing the proprietary power-generating Fibercell concept as the sensor. Such a sensor was required to have a detection capability in the primary temperature range from 300F to 1000F, plus the capacity to withstand transient temperatures in excess of these limits. In general, Fibercell consists of a ceramic electrolyte electrochemical cell in the shape of a fiber, which is dependent on its temperature for electrical power output. Since the electrolyte resistivity is logarithmically related to temperature, the cell power output lessens rapidly with decreasing temperature. Below a particular temperature (determined by ceramic electrolyte composition) the cell is effectively disconnected from the alarm system -- a behavior that lends itself to long service life of the cell. To improve power output, reliability, and response time, various combinations of materials and construction methods were employed with resulting improvement in performance. With utilization of more energetic electrodes, and other means discussed in the report, potentially greater efficiency can be achieved. (Author)

Descriptors :   (*TEMPERATURE SENSITIVE ELEMENTS, ELECTROLYTIC CELLS), (*AVIATION SAFETY, DETECTORS), THERMAL BATTERIES, PROBES, AIRBORNE, CERAMIC MATERIALS, LITHIUM COMPOUNDS, BORON COMPOUNDS, SILICATES, HEATING, WARNING SYSTEMS, FIRE ALARM SYSTEMS, MANUFACTURING, MATERIALS, PERFORMANCE(ENGINEERING)

Subject Categories : Flight Control and Instrumentation
      Non-electrical Energy Conversion
      Safety Engineering

Distribution Statement : APPROVED FOR PUBLIC RELEASE