Communications – electrical: acoustic wave systems and devices – Signal transducers – Underwater type
Patent
1999-06-11
2000-12-12
Lobo, Ian J.
Communications, electrical: acoustic wave systems and devices
Signal transducers
Underwater type
367910, 116 26, 116137R, G10K 107, B63C 1126
Patent
active
061607606
ABSTRACT:
An underwater signaling device 10 provides an enclosure 20 having handle 25 and barrel 21 portions. A trigger 40 is pivotally carried by the handle portion, and provides a pivoting spur 50 which extends into the barrel portion. A hammer 30 is sized for travel within the barrel portion. A primary spring 60, carried within a rearward end portion of the barrel is sized to propel the tip of the hammer into a bell 70 carried by a forward portion of the barrel. A primary spring 60, carried within a rearward end portion of the barrel is sized to propel the tip of the hammer into a bell 70 carried by a forward portion of the barrel. A secondary spring 65, carried within a forward end portion of the barrel is sized to urge the hammer out of contact with the bell after the initial impact, thereby preventing the hammer from damping the vibration of the bell. In operation, the trigger is manually activated, urging the hammer rearwardly, thereby compressing the primary spring. The trigger then releases the hammer, and the primary spring relaxes, causing the hammer to advance and the strike the bell. Movement of the hammer compresses the secondary spring, which then urges the hammer away from the bell and into a position between the relaxed primary and secondary springs. Release of the trigger causes the spur to pivot against the bias of its spring, allowing the spur to pass the end of the hammer. The spur then pivots to its resting position, engaged against the hammer.
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Lobo Ian J.
Thompson David S.
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