Air pressure gauge with self contained adjustable alarms
First Claim
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1. An air tank pressure gauge for use by scuba divers comprising:
- a dial having a pressure indicator range from 0 lbs. to about 4,000 lbs. and marks corresponding thereto, a cutout portion for limiting the travel of an alarm pointer to between 250 lbs. and 1,000 lbs., and an air tank pressure indicator needle attached to a rotatable center hub for indicating the air tank pressure;
a light emitting diode mounted in an LED holder which is attached to the dial near the 4,000 lb. mark;
a shoulder screw screwed into the LED holder;
a coiled Bourdon tube assembly connected to the center hub;
an indicator lever pivotally attached to the shoulder screw and having a horizontal portion, a first ninety-degree bend, a vertical portion, a second ninety-degree bend, and terminating in said alarm pointer;
two electrically-conductive contacts mounted on the horizontal portion of the indicator lever near the first ninety-degree bend, said contacts connected in series to the light emitting diode, a battery, and an audible alarm;
a shorting lever pivotally attached at one end to the rotatable center hub and having an electrically-conductive shorting bar mounted at the opposite end of the lever such that when the air tank pressure reaches a predetermined level, the shorting lever aligns with the horizontal portion of the indicator lever, causing the shorting bar to contact the electrically-conductive contacts, completing an electrical circuit and thereby energizing the audible alarm and the light emitting diode.
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Abstract
A diver'"'"'s air tank pressure gauge having audible and visual alarms, an alarm pointer for indicating the pressure at which the alarms will activate, and a crank assembly for changing the position of the alarm pointer. The pressure gauge dial has a cutout for limiting the travel of the alarm pointer between acceptable high and low pressure limits. When the air tank pressure equals a preset alarm pressure, an electrical circuit is completed which activates the alarms. The diver can then turn off the alarms by resetting the alarm indicator to a lower pressure setting and continue the dive at a shallower depth.
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Citations
4 Claims
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1. An air tank pressure gauge for use by scuba divers comprising:
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a dial having a pressure indicator range from 0 lbs. to about 4,000 lbs. and marks corresponding thereto, a cutout portion for limiting the travel of an alarm pointer to between 250 lbs. and 1,000 lbs., and an air tank pressure indicator needle attached to a rotatable center hub for indicating the air tank pressure; a light emitting diode mounted in an LED holder which is attached to the dial near the 4,000 lb. mark; a shoulder screw screwed into the LED holder; a coiled Bourdon tube assembly connected to the center hub; an indicator lever pivotally attached to the shoulder screw and having a horizontal portion, a first ninety-degree bend, a vertical portion, a second ninety-degree bend, and terminating in said alarm pointer; two electrically-conductive contacts mounted on the horizontal portion of the indicator lever near the first ninety-degree bend, said contacts connected in series to the light emitting diode, a battery, and an audible alarm; a shorting lever pivotally attached at one end to the rotatable center hub and having an electrically-conductive shorting bar mounted at the opposite end of the lever such that when the air tank pressure reaches a predetermined level, the shorting lever aligns with the horizontal portion of the indicator lever, causing the shorting bar to contact the electrically-conductive contacts, completing an electrical circuit and thereby energizing the audible alarm and the light emitting diode. - View Dependent Claims (2, 3)
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4. An air tank pressure gauge comprising:
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a dial having a pressure indicator range from about 0 lbs. to about 4,000 lbs. and marks corresponding thereto, a cutout portion for limiting the travel of an alarm pointer to between about 250 lbs. and about 1,000 lbs., and an air tank pressure indicator needle attached to a rotatable center hub for indicating the air tank pressure; a coiled Bourdon tube connected to the center hub; an indicator lever pivotally attached to a shoulder screw, said shoulder screw held in fixed relation with the dial at a position near the 4,000 lbs. mark of the dial, said indicator lever having a horizontal portion, a first ninety-degree bend, a vertical portion, a second ninety-degree bend, and terminating in said alarm pointer; two electrically-conductive contacts mounted on the horizontal portion of the indicator lever near the first ninety-degree bend said contacts connected in series to a light emitting diode and a battery; a shorting lever pivotally attached at one end to the center hub and having an electrically-conductive shorting bar mounted at the opposite end of the lever such that when the air tank pressure reaches a predetermined level, the shorting lever aligns with the horizontal portion of the indicator lever, causing the shorting bar to contact the electrically-conductive contacts, completing an electrical circuit and thereby energizing the light emitting diode.
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Specification