Stop-watch for diver including depth indicator - converts water pressure into corresponding electrical value shown on liq. crystal display element parallel with time display

摘要

The driver's stop-watch includes a water depth display derived from pressure on a membrane (3) and a time display both of which may be digital, with the two displays (2) positioned one beneath the other or next to one another. Pref. the stop-watch has a flat rectangular casing secured to a wrist band (1), the rear face of the casing having a concave cylindrical section for accommodating the drivers arm. Each display (2) may employ a fluidic crystal module, with the depth display coupled to a circuit comprising an analogue/digital converter, a clock oscillator, a reference voltage source, a decoder and an AC voltage source.