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637,145 · Moffat & Dobbins · "Light-Projecting Glass" · Page 2 Home  > Prism Glass  > Patent Index  > Page 2

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substantially at a right angle to the prism-bars and presenting outer convex faces of such radius of curvature that all incident ray, striking any part of the convex surface, and refracted thereby, will pass through the glass without reflection from an internal surface of the lens-bar, substantially as specified.     In testimony that we claim the foregoing as

our invention we have signed our names, in presence of two witnesses, this 2d day of June, 1899. GEORGE MOFFATT. EDWARD JOHN DOBBINS. Witnesses:     FRANK N. BOOZ,     HENRY A. JAMES.