초록 ▼

A small sonobuoy for dropping without a parachute and quickly deploying hydrophones is cylindrical and adapted to float with its axis parallel to the water. The hydrophone cable is wrapped around the housing so that the housing rotates as the cable is payed out. The antenna is also wrapped around th

A small sonobuoy for dropping without a parachute and quickly deploying hydrophones is cylindrical and adapted to float with its axis parallel to the water. The hydrophone cable is wrapped around the housing so that the housing rotates as the cable is payed out. The antenna is also wrapped around the housing and is released after the cable is fully deployed. A retainer covering the coiled cable and the stored hydrophones is held in place by a releasable pin which is released by an electrical device activated by a sea water sensitive switch. The device heats a resistor which melts a lanyard which releases the pin.

대표청구항 ▼

A sonobuoy comprising: a generally cylindrical housing defining an axis and including a cylindrical portion, an electronic circuit in said housing, an antenna supported on said housing in a retracted position, hydrophone means releasably retained in said housing, an electrical signal cable coiled ar

A sonobuoy comprising: a generally cylindrical housing defining an axis and including a cylindrical portion, an electronic circuit in said housing, an antenna supported on said housing in a retracted position, hydrophone means releasably retained in said housing, an electrical signal cable coiled around said cylindrical portion of the housing and electrically connected between said hydrophone means and said electronic circuit, said housing being buoyant in water and adapted to float with the axis of the housing parallel to the surface of the water, means for moving said antenna to an erected position, and means for releasing said hydrophone means from said housing while the sonobuoy is in a body of water whereby said hydrophone means sinks and said cable is uncoiled thereby causing rotation of the housing about said axis as the hydrophone means descends, the center of mass of said sonobuoy, after deployment of said hydrophone means, being located with respect to the center of rotation of the housing to provide a righting moment which, in conjunction with the pull of the cable, causes said sonobuoy to float with said antenna extending vertically after it is erected, the righting moment being small enough to allow rotation of the housing during descent of the hydrophone means.