To all whom it may concern:

Be it known that we, George Moffat, of No. 3821 Poplar Street, in the City of Philadelphia, State of Pennsylvania, United States of America, Electrical Engineer, and Edward John Dobbins, of Neshaminy, in the County of Bucks, State of Pennsylvania, United States of America, Designer of Iron Work, have jointly invented certain new and useful Improvements in Light-Projecting Glasses, for which we have obtained a patent in the United States of America, No. 637,145, bearing date November 14, 1899, and for which we have obtained a patent in Great Britain No. 477 of 1900, bearing date June 9, 1899, of which the following is a specification:--

Our invention relates to that class of light-projecting glasses which have upon one side a series of parallel prism-bars for refracting or reflecting the light, the object of our invention being to so construct such a light-projecting glass that the field from which the same receives its light will be enlarged and greater diffusion of the light effected, so as to materially increase the area to which light supplied by the glass.

In the accompanying drawings,

Figure 1 is a perspective view of a piece of Light-projecting glass constructed in accordance with our invention.

Figure 2 is a section of the same on the line a a.

Figure 3 is a section on the line b b.

Our improved light-projecting glass has upon one side parallel prism-bars 1 and upon the opposite side parallel lens-bars 2, disposed, in the embodiment of our