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Sweet's 1906
3 of 3
·Page 271
·Page 272
·Page 273
 
PRISM GLASS, ETC. 273 AMERICAN 3-WAY PRISM COMPANY
    On account of its structural formation (see Diagrams 3 and 4) it has greater strength for its weight than any other vault light construction. The grooved bar and the cement interlock in such a manner that any separation or iron and cement is impossible.
3-WAY PLAIN PRISM
DIAGRAM 3.   3-WAY PLAIN PRISM		 3-WAY WIRED PRISM
DIAGRAM 4.   3-WAY WIRED PRISM
THE PASCHALL INTERLOCKING SYSTEM FOR VAULT LIGHTS
    The glasses used in this construction are our 3-Way Tiles, furnished in plain lens or 3-Way Prism, with or without wire.
    The wire glass tiles are so constructed that the wire netting imbedded therein projects from the sides, and when placed in the construction, these projecting ends overlap and "interlock," thereby causing the cement to firmly tie the entire constriction into one unit. We do not keep this construction in stock, but make it to size as ordered. Orders can be filled within six days of their receipt.
    The wired tile cannot fall through when broken, and thus the risk of accidents and damaging of goods underneath is obviated.
    A bearing of about two inches on the building side, and about the same on the area wall side, should be provided. Bearing should be two inches below the finish level, as shown in Diagram 5.
3-WAY PLAIN PRISM
DIAGRAM 5. THE PASCHALL VAULT LIGHT CONSTRUCTION
BUILDING
LAWS.		     This product conforms to the Building Laws and municipal regulations of all cities, and likewise to the rules of the National Board of Fire Underwriters.
INSTALLATION.     Our system of vault lights can be laid by any ordinary cement man, and is guaranteed water-tight.
FORM OF
SPECIFICATION.		     Architects should specify as follows: Paschall Interlocking System of Vault Lights, as manufactured by the American 3-Way Prism Co., of Philadelphia, Pa.