Instrument for indicating the depths and durations of decompress

Details Instrument for indicating the depths and durations of decompress Instrument for indicating the depths and durations of decompress

1976-01-02

1977-11-01

Queisser, Richard C.

Measuring and testing

Miscellaneous

G06G 500, G01F 2314

Patent

active

040560104

ABSTRACT:
An instrument for indicating the depths and durations of the decompression stops required to be made by a diver during an ascent from an underwater dive is disclosed. The instrument comprises a transparent rigid cylindrical chamber linked to a chamber having at least one resilient wall by a restrictor which allows only a very slow transfer of gas from one chamber to the other. Within the rigid chamber is a pressure indicator comprising a transparent or semi-transparent pipe one end of which is sealed and the other end of which is open to the interior of the rigid chamber. A piston is slidably housed in the pipe and moves along it in dependence on the pressure in the rigid chamber, the position of the piston forming a visible indication of the pressure.

REFERENCES:
patent: 3121333 (1964-02-01), Alinari
patent: 3457393 (1969-07-01), Stubbs et al.
patent: 3463015 (1969-08-01), Gulino et al.
patent: 3777573 (1973-12-01), Alinari
patent: 3886801 (1975-06-01), Hills
patent: 3933049 (1976-01-01), Shamlian et al.

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