Low air warning system for scuba divers

An improved scuba diving system of the type having an air supply tank, a primary air regulator connected to the tank and a diving mask having a face plate;

• the improvement comprising:
• an air pressure sensor connected to said primary air regulator for responding to the air pressure within said tank by generating a first switch activation when said air pressure is below a predetermined threshold and a second switch activation when said air pressure is above said threshold;
• a transmitter electrically connected to said sensor for radiating first and second electromagnetic signals corresponding to said first and second switch activations, respectively;
• a receiver in wireless communication with said transmitter for receiving said first and second electromagnetic signals and producing corresponding first and second light flashing displays, respectively;
• said receiver being positioned adjacent said diving mask and producing said displays at said face plate.

A visual alarm system for warning a diver of a potentially dangerous condition while under water;

• the system comprising:
• a condition sensor responsive to a dangerous condition to produce an electrical effect;
• a transmitter and a receiver;
• said transmitter being in electrical communication with said sensor for generating either of at least two distinct electromagnetic radiations depending upon the status of said sensor;
• said receiver being positioned relative to said transmitter for receiving said radiations and for controlling a display in accordance with the radiation received from said transmitter;
• a display in electrical communication with said receiver and having at least one source for generating different forms of light signals depending upon which of said radiations is received by said receiver, said light-generating source being positioned in the diver's field of view adjacent the face of the diver to assure diver recognition of said light signals and of said potentially dangerous condition;
• and
• water-activated switches for activating said transmitter and said receiver automatically when said system is under water.

An alarm system for a scuba diver comprising:

• a sensor for sensing the status of a critical parameter;
• an alarm device mounted adjacent the diver's head for gaining the diver's attention;
• and
• a wireless transmitter and receiver combination responsive to said sensor for generating an alarm indication adjacent the diver's head as warranted by the status of said critical parameter;
• said transmitter and receiver combination having frequency-matched inductive coils for electromagnetic transmission from said transmitter to said receiver by means of a time-varying magnetic field.