Fecha de publicación: 18/06/1914 Fuente: WIPO "pollen" 14,521. Pollen, A. H., and Isherwood, H. June 23. Range-finders.-Bearing, set by a pointer 40 on a carriage 21 moved transversely on the bar 20 in accordance with the instrumental reading, is plotted on a paper sheet 2 moved at a rate proportional to the reciprocal of the range from a motor 10 through a variable-speed device 7, 8. The arm 41, when set at a tangent to the curve thus plotted, gives the deflexion.