Telegraph Wire and Insulators by Charles Chester

Telegraph Wire and Insulators.

THE improved insulator advertised by Mr. CHARLES T. CHESTER in our columns seems to present as nearly a perfect insulating arrangement as is possible with glass. A recent improvement upon this insulator adds very much to its insulating properties. In casting the insulator four projections are left, with raised teeth, which cut a thread upon the pin as it is forced into the socket. By this means the surface contact between the glass and pin is reduced two thirds without impairing the strength or durability of the insulator. Besides this a drip is cast which prevents to a considerable degree the collection of moisture in immediate contact with the pin. The CHESTER A 1 telegraph line wire has been favorably received, and is no doubt a superior article. Its uniformity is a decided recommendation.