Aviation Electronics

Details of Electrical and Electronic Apparatus with Applications in the Maintenance and Operation of Aircraft, Missiles and Space Vehicles. An electro‐chemical Elapsed Time Indicator, the Type 1217, is now available from the Micro‐Circuit Division of S. Davall & Sons Ltd. Designed to fit a standard fuse holder, it displays the passage of time as a clearly visible physical change against a graduated scale, with accuracies of plus or minus 5 per cent, or plus or minus 15 per cent with an unregulated supply. It is robust, reliable, and will work over a temperature range of minus 10 deg. C. to plus 85 deg. C.