New S.O.S. Device.

New York Times 100 years ago today, April 5, 1913:
It Causes Wireless Apparatus to Register Signals Automatically.
By Marconi Transatlantic Wireless Telegraph to The New York Times.
    LONDON, April 4.— A system of transmitting wireless signals from a ship in distress, invented by Raymond Phillips, was demonstrated in London to-day. It is intended to insure the receipt of such signals independently of a wireless operator.
    The ship in distress sends out a signal consisting of a continuous train of waves as distinct from the intermittent Morse Code. This signal causes contacts to be made automatically in the receiving ship, which work an electrical siren or bell and thus draw the attention of the operator. Should the receiving apparatus be engaged the continuous train will cut out the Morse signals.
    The system is intended to be operative within a radius of twenty or thirty miles, but it has not yet been applied to actual service at sea.