Quality control testing procedure for incandescent lamps - subjecting bulb to acceleration and measuring resultant change in resistance of filament

摘要

A method for testing a gas-filled hollow bulb, with a coiled or straight incandescent filament through which a current flows, is applied for monitoring filler gas composition, filling pressure and centrality of the filament. The hollow bulb is subjected to an acceleration. The resistance alteration produced in the filament is measured. The position of the bulb is altered, and the resulting alteration in the resistance of the filament is measured. USE/ADVANTAGE - Quick, exact and cost effective monitoring of bulb parameters without destruction.