Page:Popular Science Monthly Volume 89.djvu/534

 Pocket-Flashlight Distress-Signals

��AXKWtt\slem - cell battery. At one end there is a parabolic reflector about five inches in diameter. Fitted at the base of the reflector is a six-volt bulb with a highly concentrated tungsten filament. At the other end is a "key" or switch to turn the current on or off and flash the light. Messages are sent b\' long and short flashes, corresponding with the Morse code dots and dashes.

���The flashlight consists of a heavy nickel-plated barrel en- casing a dry cell battery and having at one end a parabolic reflector fitted with a bulb containing a tungsten filament

possible and will also make it possible to flash communications. Hence Coast Guardsmen can signal m a ^hip m distress its approximate [position and ti'U the master thi- best course to safe water. Altiiougii onK- slightly larger than tiu' pocket lam|)s in common use, the new light i)ro(luces a flash that can be seen for seven miles in good weather. It con- sists of a heavv nickel piatcil barri-1 en-

��Keteiiiiy ("oast Guard oliicers made experiments with the new signal light olT the X'irginia Cajies on a stormy night, ("ape ilenr\- light, which under good con<litions ii^ \isibU' for nearly lwent\- threi' mill's, could not bi' seen for more than eight miles. The pocket flash could be sei'n four and one-half miles.

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