Up: Patent Index

2014 · Hayward · "Pavement Lights" · Page 3 Home  > Prism Glass  > Patent Index  > Page 3

2,014: 3 of 6

Specification	A.D. 1871. -- Nº 2014.	3
Hayward's Improvements in Pavement Lights.

same was to be performed, and cause the same to be filed in the Great Seal Patent Office within six calendar months next and immediately after the date of the said Letters Patent.     NOW KNOW YE, that I, the said Edward Lambert Hayward, do hereby declare the nature of the said Invention, and in what manner the same is to be performed, to be particularly described and ascertained in and by the following statement thereof, that is to say:--     This Invention has for its object improvements in pavement lights.     Pavement lights are commonly used to cover the areas in front of windows in the basements of buildings, and the object of my Invention is so to construct them that they may not simply allow the light to pass through, but that they may also direct the light in an inclined direction into the rooms it is desired to light. For this purpose I glaze the frame of the pavement light with glass which is moulded so as to be of a prism-like form on the under side, resembling to some extent in this respect the glasses which are often inserted into ships' decks to give light below.     The form and arrangement of the prism is, however, entirely altered in order that the light may be throw forward in one direction, as already stated. One of the sides of the prism is upright or nearly so, and the other side is inclined to it at such an angle that the light passing through the upper surface may strike this inclined side and be reflected completely or nearly so within the prism, and issue from the upright or nearly upright side in the direction required. The sides of the prism may be flat or curved in a horizontal plane.     I usually form the glasses to glaze pavement lights hexagonal on the upper surface, and fit them into an iron frame with corresponding hexagonal cells, but the glass may be made rectangular or of other form on the upper surface.     In order that my said Invention may be most fully understood and readily carried into effect, I will proceed to describe the Drawings hereunto annexed. DESCRIPTION OF THE DRAWINGS.     Figure 1 is a plan of a pavement light consisting of a cast-iron frame, in which are a number hexagonal recesses, or the recesses might be square or other other form.