Show WIRELESS ALARM BELL Ordinarily a wireless message is audible only in m a telephone receiver making it necessary for operators to wear rear their head heat s sits sets t. t continuously 8 states ates an article in the May issue of Popular Mechanics Magazine One of the thc large wireless operating companies companies companies com com- has just completed a system whereby an alarm bell is is actuated only by hy the reception of a 3 new form fonn of S 0 0 S. S signal consisting of ofa a series series of or dots a minute sent out continuously and automatically by a ship in ill distress |