This invention is one of the simplest character, and can be described in very few words; notwithstanding which fact it possesses several important advantages which the practical mind will at once recognize. In place of figured. ground, or stained glass used for transmitting light without permitting objects to be viewed through them, for office windows, screens, signs, etc., the inventor employs a series of glass. rods cut to the proper length .and placed side by side in grooves cut in the frame or sash, as shown in Fig. 1; or two or more series of glass rods placed across each other at right Fig. 1. angles, as shown in Fig. 2, or at any other angle desired to produce a given effect. The light, in passing through these rods, becomes broken up so as to cut off vision through them, at the same time that the illuminating power of the light transmitted is not materially impaired when plain white glass is employed. The advantages claimed for this method of using glass in window lights, screens, etc., are, that a much cheaper light can be made in this manner than by grinding, etching, or staining glass; that in case of breakage only the broken rods need be removed and their places supplied with new rods at a com-Fig. 2. paratively small cost; while. by using rods of various colors, in a single or crossed series, as shown in the engraving, very striking and showy effects can be produced by the transmitted and refracted light through such a series ; the combinations of color being practically without limit. This invention was patented through the Scientific American Patent Agency, by William A. Demuth, September 22, 1868. The agent for all sales is Victor E. Mauger, 110 Reade street, New York, who may be addressed for further information.
This article was originally published with the title "Demuth's Improvement in Glass Window Lights" in Scientific American 21, 16, 248 (October 1869)