The Independent . ELMER A. SPERRY, Inventor of the searchlight, and also of a ship stabilizer, the gyro-compass, and the first electric arc light THE GREAT MIRRORThis glare of one and a quarter billion candle-power is as brilliant as afternoon sunlight. Thebox on the floor provides electric control thirtyfeet away itive electrode, thus adding to thebeams intensity. A peep sight fur-nished with colored glass is used toenable the operator to watch the arcwithout being blinded by the glare, orhe can see an exact reproduction of thearc formed by lenses upon ground glassoutside of the lamp. The lig
The Independent . ELMER A. SPERRY, Inventor of the searchlight, and also of a ship stabilizer, the gyro-compass, and the first electric arc light THE GREAT MIRRORThis glare of one and a quarter billion candle-power is as brilliant as afternoon sunlight. Thebox on the floor provides electric control thirtyfeet away itive electrode, thus adding to thebeams intensity. A peep sight fur-nished with colored glass is used toenable the operator to watch the arcwithout being blinded by the glare, orhe can see an exact reproduction of thearc formed by lenses upon ground glassoutside of the lamp. The light is re-duced or shut off by means of an irisdiaphragm (similar to a type used onhigh grade cameras) which may beseen in the front view of the search-light back of the glass. The Sperry light is designed for vari-ous military and naval purposes, be-sides those of peace. It locates enemyforces, vessels or air craft, and is use-ful also in throwing a screen of light,for it is impossible to see thru thebeam. Thus op
Size: 1307px × 1913px
Photo credit: © The Reading Room / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1800, bookdecade1840, bookpublishernewyorkswbenedict
