Underwater siren

Claim 2

In an underwater siren of the character disclosed, the combination of a cylindrical member having a closed end portion and a plurality of ports radially arranged therein, means for supplying hydrostatic pressure to the interior of said cylindrical member, a cup-shaped valve member encircling an end portion of said cylindrical member and having a plurality of apertures adapted to be brought into registered engagement with said ports respectively as the cup-shaped member rotates thereby to interrupt the flow of water tHrough the ports momentarily and repeatedly, means including a flat bearing surface for supporting said cup-shaped valve member for rotation on said cylindrical member with the bottom thereof in closely spaced adjacency with respect to said closed end portion, means responsive to the flow of water through said ports for causing the cup-shaped member to rotate, and means including an annular recess of substantially the same diameter as the outside diameter of said cylindrical member formed in the bottom of said cup-shaped valve member and a plurality of vents in communication therewith for relieving the water pressure between the bottom of said cup-shaped member and said closed end portion of the cylindrical member thereby to reduce the friction of the cup-shaped valve member against said flat bearing surface.

Claim 3

In an underwater signalling device, in combination, a cylindrical casing having a plurality of uniformly spaced radial apertures and one end thereof closed by an end wall integrally formed therewith, a cover sealed to said casing at the other end thereof, a tubular inlet member secured to said cover and centrally disposed within said cylindrical casing in spaced relation with respect thereto for providing an air chamber between said member and the casing, means operatively connected to said member for supplying a mixture of water and air under pressure to said tubular member, a cup-shaped signalling valve in engagement with said casing and rotatably supported on said end wall said valve having a plurality of obliquely arranged complementary apertures therein for producing underwater signals as the valve is rotated by said mixture, a stud shaft threaded in said end wall and having an end thrust bearing member thereon for rotatably supporting the valve on one end of said casing, and means including a plurality of vents in the valve for relieving the axial pressure of the water in the bottom of said cup-shaped valve member thereby to reduce the friction between the value and said end thrust bearing member.

Claim 4

In an underwater signalling device, in combination, a cylindrical casing having a plurality of uniformly spaced radial apertures and one end thereof closed by an end wall integrally formed therewith, a cover sealed to said casing at the other end thereof, a tubular inlet member secured to said cover and centrally disposed within said cylindrical casing in spaced relation with respect thereto for providing an air chamber between said member and the casing, means operatively connected to said member for supplying a mixture of water and air under pressure to said tubular member, a cup-shaped signalling valve in engagement with said casing and rotatably supported on said end wall said valve having a plurality of obliquely arranged complementary apertures therein for producing underwater signals as the valve is rotated by said mixture, a stud shaft threaded in said end wall and having an end thrust bearing member thereon for rotatably supporting the valve on one end of said casing, and means including a plurality of vents in the valve for relieving the axial pressure of the water in the bottom of said cup-shaped valve member thereby to reduce the friction between the value and said end thrust bearing member.

Claim 5

In an underwater signalling device, in combination, a cylindrical casing having a plurality of uniformly apertures therein an end wall formed on said casing for closing one end thereof, a cover sealed to the other end of the casing, means including a plurality of fasteners for sealing said cover to the casing, a tubular inlet member secured to said cover and centrally disposed within the casing in spaced relation with respect thereto and with the end wall thereof for providing an air chamber between said casing and member, means including a pump operatively connected to the member for supplying a mixture of water and air to the member, a signalling valve rotatably supported on the casing and comprising a flanged portion in engagement with the outer surface of the cylindrical casing and a base plate in closely spaced adjacency with said end wall for producing underwater signals as the valve is rotated by said mixture, said valve having a plurality of obliquely arranged complementary apertures therein in registry with said first named apertures, said base plate having a centrally disposed opening formed therein, a stud shaft threaded in said end wall, a bearing on said shaft and arranged in said opening for rotatably supporting the valve on one end of the casing, means including a lock nut threaded on said stud shaft and a washer between said nut and said end wall for maintaining the valve in engagement with said cylindrical casing and the base plate thereof in said closely spaced adjacency with said end wall, and means including an annular groove formed in the base plate for relieving the pressure of the water between the valve and said base plate thereby to reduce the friction between the valve and said washer.

Claim 6

In an underwater signalling device, in combination, a cylindrical casing having a plurality of uniformly apertures therein an end wall formed on said casing for closing one end thereof, a cover sealed to the other end of the casing, means including a plurality of fasteners for sealing said cover to the casing, a tubular inlet member secured to said cover and centrally disposed within the casing in spaced relation with respect thereto and with the end wall thereof for providing an air chamber between said casing and member, means including a pump operatively connected to the member for supplying a mixture of water and air to the member, a signalling valve rotatably supported on the casing and comprising a flanged portion in engagement with the outer surface of the cylindrical casing and a base plate in closely spaced adjacency with said end wall for producing underwater signals as the valve is rotated by said mixture, said valve having a plurality of obliquely arranged complementary apertures therein in registry with said first named apertures, said base plate having a centrally disposed opening formed therein, a stud shaft threaded in said end wall, a bearing on said shaft and arranged in said opening for rotatably supporting the valve on one end of the casing, means including a lock nut threaded on said stud shaft and a washer between said nut and said end wall for maintaining the valve in engagement with said cylindrical casing and the base plate thereof in said closely spaced adjacency with said end wall, and means including an annular groove formed in the base plate for relieving the pressure of the water between the valve and said base plate thereby to reduce the friction between the valve and said washer.