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595,262 · Booth · "Mold for Prism Lights" · Page 2 Home  > Prism Glass  > Patent Index  > Page 2

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uniform thickness. When my mold is used, this difficulty is obviated, for the thickness of the prism-lights depends upon the size of the recesses A', and as these recesses may be made uniform it will be seen that all the prism-lights will be of uniform thickness. The part B is preferably made in sections, as shown in Fig. 1, so that the grooves between the parts A' may be easily milled. These sections are then pinned together at the corners. The part D may also be made in sections similar to the part B; but these sections are pivoted together, so that the mold may be opened. The parts B and D may be connected together, so as to form a single part, if desired. I have shown the core A as solid; but it is of course evident that it may be hollowed out or made of any other desired shape. It is of course evident that the recesses A' may be formed so as to mold any article

desired, and I of course do not limit my invention to the molding of prism-lights.     I claim—     A mold for prism-lights, comprising a core, around which the prism-lights are formed, a surrounding part inclosing said core and movable with relation thereto, a series of recesses between said core and surrounding part, in which the prism-lights are formed, the opposed surfaces of the core and surrounding part inclined so that a relative movement of said core and surrounding part varies the distance between said opposed surfaces, and means for forcing the material from which the prism-lights are formed into said recesses. KRAFT BOOTH. Witnesses:     DONALD M. CARTER,     HOMER L. KRAFT.