Publication: Electrical World
New York, NY, United States
HARD PORCELAIN INSULATORS. — The Union Porcelain Works, Greenpoint, N.Y., are the only makers of hard porcelain or true china tableware in the United States, and they also make insulators of the same excellent material. The body aad glaze are composed of the same substances, fused together in the greatest heat, and the resulting insulator is absolutely vitreous. In the opinion of many experts hard porcelain makes a better insulator than glass, being much harder and more durable. Where uncovered wires are used this is a very important point, as this insulator wilt not absorb moisture or retain it on the surface, and the insulation resistance thus remains unaffected by atmospheric changes. Hence good as well as safe work can be done by using them. The Works make porcelain insulators of many styles and sizes, adapted to telephone, telegraph and electric-light work. Many of the forms having been copied by makers of interior insulators, the works have establishsd the rule of stamping a trade-mark upon the more important insulators they make. This trade-mark is an eagle's head with the letter S in its beak, and underneath the letters U. P. W. Purchasers can thus ascertain whether they are buying the well-known and popular product of the Union Porcelain Works.
|Keywords:||Union Porcelain Works|
|Date completed:||May 1, 2009 by: Bob Stahr;|