Portable low frequency projector
AssigneeHer Majesty the Queen in right of Canada, as represented by the Minister of National Defence
InventorsRichard Religa, Richard Fleming, George Schattschneider
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Abstract
A portable low frequency underwater acoustic projector having two circular diaphragms separated by a spacer ring with a pair of coils and oscillating masses being located in pipes connected to central opening in two diaphragms, the coils driving these masses in opposite directions. Central openings in each diaphragm have an associated pipe extending outward from the interior of the projector, the pipe having closed outer ends. The interior of the projector being gas filled to provide pressure compensation.
Claims11
A low frequency acoustic projector containing a pair of drive coils and an associated oscillating mass for each coil, the oscillating masses moving in opposition to one another, the drive coils and oscillating masses being located in a pipe extending outward from a central opening in a pair of diaphragms that are separated by a spacer ring, outer ends of the pipes being closed by a disc, the pipes being open to a space between the diaphragms.
A low frequency acoustic projector as defined in claim 4, wherein an O-ring is located in each pipe adjacent each weld.
A low frequency underwater acoustic projector containing a pair of drive coils and an associated oscillating mass for each drive coil, the oscillating masses moving in opposition to one another, the drive coils and oscillating masses being located in a pipe extending outward from a central opening in a pair of diaphragms that are separated by a spacer ring, outer ends of the pipes being closed by a disc, the pipes being open to a space between the diaphragms.
A low frequency underwater acoustic projector as defined in claim 11, wherein interior portions of the projector are pressure compensated with a gas.
Dependencies are inferred from the claim text.