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3058 · Pellatt · "Lighting the Interior of Ships, Buildings, &c" · Page 3 Home > Prism Glass > Patent Index > Page 3 |
 3,058: 3 of 4 |
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Up: Patent Index |
3058 · Pellatt · "Lighting the Interior of Ships, Buildings, &c" · Page 3 Home > Prism Glass > Patent Index > Page 3 |
3,058: 3 of 4 |
square or circular frame made of wood or of metal, with glazier's putty or other cement. For decks and other parts of ships, its construction is so managed by thickening the edges, as to render it capable or resisting any injury from the weight of goods of every description, and the beating of the waves of the sea in the ports and scuttles. It is let into the deck or other building with the convex part projecting above it, so as to receive the rays of light; it is fixed in the deck or other building either with or without a wooden or metal frame, according as the space wherein it is to be fixed will allow; a groove of only one quarter of an inch will be sufficient to keep it firm, and in a deck of three inches thick, one quarter of an inch is bearing enough; in decks of less substance, the bearing must be increased one-eighth of an inch. The under part of the deck or other building which forms the ceiling of the cabin or place must be sloped away all round, so as to form a small dome, that the rays of light may diverge in all directions; the like method is to be observed in the ports and scuttles of ships, or in what place soever the illuminator is fixed. By being fixed in a square or round frame, with or without hinges, it may be made to open and shut for the free admission of air in hot climates. In dwelling houses, buildings, and all other places, it is far superior to the skylights now generally used, not being liable to accident or leakage, nor can water pass under what it is fitting into. For buildings it is necessary that one side should remain unpolished, as the rays of the sun produce the prismatic colours when shining on the illuminator; this precaution is unnecessary in ships' decks, as the traffic on them in a short time grinds or roughs the upper surface, but in no degree to prevent the effect, but if any thing conveying a more pleasing light under ground, vaults, and cellars, wherever any communication may be made with the open air, may also be lighted with this Invention, excepting only where from its situation it may be liable to injury from the passing or repassing or horses, &c. The illuminator will also prove a very important substitute for the glass now used in lanthorns for lighting the powder magazines in ships of war, care being taken that the convex side be in the inside of the lanthorn where the light is placed. In witness whereof, the said Apsley Pellatt, party hereto, hath hereunto set his hand and seal, the Third day of August, in the year of our Lord One Thousand eight hundred and seven.
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