Communications: electrical – Selective – Having indication or alarm
Patent
1975-12-15
1977-12-13
Tudor, Harold
Communications: electrical
Selective
Having indication or alarm
340 3D, 340 10, H04B 1300
Patent
active
040632148
ABSTRACT:
An acoustic lens for marine doppler sonar apparatus of the type in which acoustic energy is radiated and received along a beam directed at an angle with respect to a ship's axis is fabricated so as to have an external surface substantially flush with the ship's hull and an internal surface angularly disposed with respect to the external surface. Electro-acoustic transformation elements are mounted on the internal surface. The lens material is selected to have an acoustic propagation velocity greater than that of water so that acoustic signals are refracted in passing across the lens-water interface. The lens prevents spurious acoustic signals that would ordinarily be reflected from the aerated water close to the ship's hull from reaching the electro-acoustic transformation elements.
REFERENCES:
patent: 2448365 (1948-08-01), Gillespie
patent: 2984756 (1961-05-01), Bradfield
patent: 3074268 (1963-01-01), Rafferty et al.
patent: 3728670 (1973-04-01), Rosauer et al.
patent: 3795893 (1971-07-01), Kritz et al.
patent: 3818425 (1974-06-01), Peynaud et al.
patent: 3893076 (1975-07-01), Clifford
patent: 3913386 (1975-10-01), Saglio
Roehl Joseph M.
Sperry Rand Corporation
Terry Howard P.
Tudor Harold
LandOfFree
Lens transducer for use in marine sonar doppler apparatus does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Lens transducer for use in marine sonar doppler apparatus, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Lens transducer for use in marine sonar doppler apparatus will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-491820