US3768069A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Encased gradient hydrophone assembly
Assignee: CBS Broadcasting Inc
•
Filing: 1972-01-17
•
Granted: 1973-10-23
•
Expires: 1992-01-17
Abstract
Abstract An encased gradient hydrophone assembly that is particularly suitable for operation when rigidly mounted underwater. A fluidtight cylindrical casing having openings at its opposite ends is provided. A gradient-type hydrophone is positioned within the casing, the hydrophone including a magnetic field generating means and a movable coil. Means are provided for rigidly mounting the field generating means with respect to the casing, and for resiliently mounting the coil with respect to the casing. First and second flexible diaphragms form fluid-tight enclosures at opposite ends of the casing and a non-corrosive fluid fills the enclosed casing. In a preferred embodiment of the invention impedance plates with apertures of controlled size are rigidly mounted radially across opposite ends of the casing. The plates are a convenient means of providing controlled acoustic impedance and obtaining non-symmetrical hydrophone receiving patterns.
Inventors
- 👤 L Abbagnaro
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 20:03
CPC Classifications
G; G10; G10K; G10K11/00; G10K11/02; G01; G01S; G01S1/00; G01S1/72
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
127 words
An encased hydrophone assembly suitable for operation when rigidly mounted underwater, comprising: a. a fluid-tight casing having openings at its opposite ends; b. a gradient-type hydrophone positioned within said casing, said hydrophone including means for generating a magnetic field and a movable coil positioned to intercept the magnetic flux of the generated field; c. means for rigidly mounted said field generating means with respect to said casing; d. means for resiliently mounting said coil with respect to said casing; e. means for electrically sensing relative motion of said coil in the generated magnetic field; f. first and second flexible diaphragms forming fluid-tight enclosures at opposite ends of said casing; g. fluid means filling said enclosed casing for transmitting wave motion of the water to said movable coil.
Claim 2
Dependent Claim
127 words
An encased hydrophone assembly suitable for operation when rigidly mounted underwater, comprising: a. a fluid-tight casing having openings at its opposite ends; b. a gradient-type hydrophone positioned within said casing, said hydrophone including means for generating a magnetic field and a movable coil positioned to intercept the magnetic flux of the generated field; c. means for rigidly mounted said field generating means with respect to said casing; d. means for resiliently mounting said coil with respect to said casing; e. means for electrically sensing relative motion of said coil in the generated magnetic field; f. first and second flexible diaphragms forming fluid-tight enclosures at opposite ends of said casing; g. fluid means filling said enclosed casing for transmitting wave motion of the water to said movable coil.
Claim 3
Dependent Claim
21 words
An encased hydrophone assembly as defined by claim 1 further comprising means for rigidly mounting said casing to a base member.
Claim 4
Dependent Claim
56 words
An encased hydrophone assembly as defined by claim 1 wherein said field generating means comprises a magnetized inner pole piece centrally positioned within said casing and an outer pole piece radially oriented within said casing and spaced from inner pole piece, a magnetic field being generated in the spacing between said inner and outer pole pieces.
Claim 5
Dependent Claim
33 words
An encased hydrophone assembly as defined by claim 3 wherein said inner and outer pole pieces are mounted in a metal frame member, said metal frame member being rigidly mounted to said casing.
Claim 6
Dependent Claim
24 words
An encased hydrophone assembly as defined by claim 4 wherein said coil is positioned in the spacing between said inner and outer pole pieces.
Claim 7
Dependent Claim
31 words
An encased hydrophone assembly as defined by claim 5 wherein said means for resiliently mounting said coil comprises a plurality of leaf springs coupled between said coil and outer pole piece.
Claim 8
Dependent Claim
35 words
An encased hydrophone assembly as defined by claim 1 further comprising an impedance plate having at least one aperture therein, said plate being rigidly mounted radially across said casing to one side of said coil.
Claim 9
Dependent Claim
38 words
An encased hydrophone assembly as defined by claim 7 further comprising a second impedance plate having at least one aperture therein, said second plate being rigidly mounted radially across said Casing to the other side of said coil.
Claim 10
Dependent Claim
36 words
An encased hydrophone assembly as defined by claim 4 further comprising an impedance plate having at least one aperture therein, said plate being rigidly mounted radially across said casing to one side of said frame member.
Claim 11
Dependent Claim
38 words
An encased hydrophone assembly as defined by claim 9 further comprising a second impedance plate having at least one aperture, said second plate being rigidly mounted radially across said casing to the other side of said frame member.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-10-22 | 1977-04-23 | 1977-10-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-10-22 | 1981-04-23 | 1981-10-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-10-22 | 1985-04-23 | 1985-10-23 | $7700.00 | Window Closed / Lapsed |