Democratic Sentinel, Volume 16, Number 38, Rensselaer, Jasper County, 7 October 1892 — Electricity. [ARTICLE]

Electricity.

Electricity as an aid to gun making is, it is said, jn successful use at the gun factory of St. Etienne. The particular use to which it is there put is in the tempering of springs. These consist of steel wire wound spirally, and a current of twenty three amperes at forty five volts is passed through. Rapid heating results, and when the required temperature is reached the current is broken, and the spring falls into a trough of water. One workman can temper 2,400 springs par by this method.