Communications: electrical – Condition responsive indicating system – With particular system function
Patent
1988-12-22
1990-08-14
Crosland, Donnie L.
Communications: electrical
Condition responsive indicating system
With particular system function
34087016, 340705, 340573, 340850, 738651, 738663, 2 21R, 2173, 367134, 367910, 36441331, 12820119, 12820127, 375 6, G08B 2500, H04B 1100
Patent
active
049490729
DESCRIPTION:
BRIEF SUMMARY
This invention relates to a dive parameter indicating assembly for scuba diving.
Scuba diving is an exacting sport and because of a variety of potential hazards which may present themselves, numerous parameters must constantly be monitored by the diver to avoid mishap. For sports diving maximum diving depth is generally limited to not greater than 30 meters. Dives of greater depth are also preformed but are generally not within the realms of sports diving.
The duration of the bottom time for a dive is governed by numerous factors including amount of compressed air available for the dive, the depth of the dive and whether or not the dive is a repetitive one. The diver needs to be aware of numerous parameters to make his dive safe and enjoyable. Parameters such as the actual time of day, depth, water temperature, elapsed or bottom time and air pressure within a tank need to be monitored. Air pressure is indicative of the amount of air in the diver's tank. In addition to this, it is useful to keep track of surface interval duration between dives as this enables a calculation to be made of the total bottom time for a subsequent or repetitive dive to ensure that that dive is a non-decompression dive if indeed a non-decompression dive is required.
Often dives are such that if the bottom time for a non decompression dive is exceeded one or more decompression stops at one or more depths need to be made during ascent to avoid the condition known as "the bends". Decompression stop duration is governed by the length of time a diver overstays at a depth beyond the duration which would result in the dive being a non-decompression dive. Thus a diver must be able to time decompression stops.
Currently, divers utilize a variety of instruments and gauges to enable the various parameters to be monitored. In one instance a gauge console connected via a high pressure line to the regulator first stage is used. Such consoles typically carry a pressure gauge for determining tank pressure, a depth gauge with or without a maximum depth indicator (MDI), a compass for navigation and a thermometer. The gauges may either be analogue or digital in nature. Analogue gauges are usually fluid filled. Analogue depth gauges sometimes include an MDI which registers the maximum depth of a dive and this must be zeroed for subsequent dives. Digital gauges sometimes include computers for calculating the divers group designation either for a first dive or a repetitive dive and may be preprogrammed with dive tables to provide an indication of maximum dive duration or adjusted duration at certain depths.
Such consoles, as mentioned, were tethered to the regulator first stage and sometimes proved difficult to retrieve for viewing during a dive. In addition there was always the danger that the console and or hose may become entangled or snared on objector the like during a dive. Consoles were prone to damage as other diver's gear was sometimes inadvertently dropped on them. Also, all the gauges were generally not on one side of the console and the console needed to be manipulated and turned to enable the gauges to be viewed. Consoles did not provide for "hands free" use.
Other gauges were sometimes worn like wrist watches on either one or both wrists. These would sometimes become dislodged particularly when wet suit material became compressed at depth and once again did not provide for "hands free" viewing. Such gauges did not display all parameters of interest to a diver and did not for example provide an indication of remaining air.
A divers mask is chosen with numerous characteristics in mind. The mask must be comfortable, provide a reasonable degree of vision and should provide a small as possible air space between the diver's face and the mask. If an unnecessarily large space is present it becomes difficult for the diver to equalise pressure in air spaces in his body during descent and ascent.
It is an object to provide a dive parameter indicating assembly for use in scuba diving.
The display may be integral with or attachable to a diver's face m
REFERENCES:
patent: 3712714 (1973-01-01), Uyeda et al.
patent: 3784805 (1974-01-01), Rolle
patent: 3992948 (1976-11-01), D'Antonio et al.
patent: 4480323 (1984-10-01), Page
patent: 4550984 (1985-11-01), Reymond
patent: 4563758 (1986-01-01), Paternostro
patent: 4679177 (1987-07-01), Aoyagi et al.
patent: 4776045 (1988-10-01), Mysliwiec et al.
Adamek Michael
Comerford Ernest
Comerford Ernest
Crosland Donnie L.
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