J.F. Buzby, a glassworker of Royersford, PA has invented a new glass mold for insulators

INSULATOR MOLD PATENTED.

J. F. Buzby, a glassworker of Royersford, Pa., has invented a mold for glass which is especially designed for the manufacture of glass insulators, for wiring systems. Means are provided whereby a hole entirely through an article can be molded; also, means whereby another hole extending from the exterior surface of the article to the first hole can be efficiently formed. Also means for locking the mold parts together and for simultaneously unlocking the mold parts and withdrawing one of the cores are provided.