Author(s)Lake, R. G.
Contributor(s)HAMILTON WATCH CO LANCASTER PA
KeywordsMachinery and Tools
Ammunition and Explosives
*CLOCK DELAY MECHANISMS
TIME DELAY FUZES
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AbstractThe effect of substitution of sapphire jewelled bearings for brass at the pinion pivots on timer escapement and gear train efficiency was investigated. Results indicated that jewelling had no significant effect on the performance of the timer movements. Since the data was based on only 10 runs, the operating life increase is difficult to predict. It is reasonable to assume that pivot life and pivot hole sizes could be maintained over a greater number of operating cycles, especially the heavier loaded pivots.