| 摘要 |
<p>The present invention relates to a drowning alert transmitter comprising: a) a head component 1 for securing on a swimmer's head, b) a head sensor 6A,6B to sense if a swimmer's head is inclined back relative the upper torso and to then generate an alert signal, and c) a transmitter 3 connected to the head sensor to transmit an alarm signal upon generation of an alert signal.</p> |
