Details
EDISON, THOMAS ALVA. Document BOLDLY SIGNED (with a fine "Umbrella" paraph), A LITHOGRAPHIC PLAN FOR THE INCANDESCENT ELECTRIC LIGHT, witnessed by Charles H. Smith and George T. Pinckney, n.p., n.d. [1881]. One page, a large oblong, 408 x 582mm. (16 x 23mm.) edges reinforced from back at early date, two corners with tiny losses, clean tear in right-hand margin neatly mended, printed in crisp black ink on smooth-finish cream paper.
While experimentation had begun as early as 1840 on incandescent lamps, Edison was the first to perfect all its elements and the means by which bulbs and lamps could be simply manufactured, and to construct the the electrical power system, generator and transformers, which were entirely original. Edison's first system was operative in New York in 1882. The present very decorative plan depicts in five numbered drawings, elevations and perspective views the complex equipment which delivered a constant current of voltage to Edison's lamps. The lithograph was part of Edison's 1881 application for a patent of his invention in Bolivia. Edison's characteristic florid signature appears in the lower center portion of the sheet.
While experimentation had begun as early as 1840 on incandescent lamps, Edison was the first to perfect all its elements and the means by which bulbs and lamps could be simply manufactured, and to construct the the electrical power system, generator and transformers, which were entirely original. Edison's first system was operative in New York in 1882. The present very decorative plan depicts in five numbered drawings, elevations and perspective views the complex equipment which delivered a constant current of voltage to Edison's lamps. The lithograph was part of Edison's 1881 application for a patent of his invention in Bolivia. Edison's characteristic florid signature appears in the lower center portion of the sheet.