GB632286A - Improvements in or relating to apparatus for transmitting and receiving compressional wave energy - Google Patents
Improvements in or relating to apparatus for transmitting and receiving compressional wave energyInfo
- Publication number
- GB632286A GB632286A GB10567/43A GB1056743A GB632286A GB 632286 A GB632286 A GB 632286A GB 10567/43 A GB10567/43 A GB 10567/43A GB 1056743 A GB1056743 A GB 1056743A GB 632286 A GB632286 A GB 632286A
- Authority
- GB
- United Kingdom
- Prior art keywords
- amplitude
- diameter
- transmitting
- parallel
- row
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
- 238000010276 construction Methods 0.000 abstract 1
- 230000007423 decrease Effects 0.000 abstract 1
- 239000010432 diamond Substances 0.000 abstract 1
- 230000000694 effects Effects 0.000 abstract 1
- 238000007689 inspection Methods 0.000 abstract 1
- 238000000034 method Methods 0.000 abstract 1
- 230000005855 radiation Effects 0.000 abstract 1
- 230000011664 signaling Effects 0.000 abstract 1
Classifications
-
- G—PHYSICS
- G10—MUSICAL INSTRUMENTS; ACOUSTICS
- G10K—SOUND-PRODUCING DEVICES; METHODS OR DEVICES FOR PROTECTING AGAINST, OR FOR DAMPING, NOISE OR OTHER ACOUSTIC WAVES IN GENERAL; ACOUSTICS NOT OTHERWISE PROVIDED FOR
- G10K11/00—Methods or devices for transmitting, conducting or directing sound in general; Methods or devices for protecting against, or for damping, noise or other acoustic waves in general
- G10K11/18—Methods or devices for transmitting, conducting or directing sound
- G10K11/26—Sound-focusing or directing, e.g. scanning
- G10K11/34—Sound-focusing or directing, e.g. scanning using electrical steering of transducer arrays, e.g. beam steering
- G10K11/341—Circuits therefor
- G10K11/348—Circuits therefor using amplitude variation
Landscapes
- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Acoustics & Sound (AREA)
- Multimedia (AREA)
- Geophysics And Detection Of Objects (AREA)
Abstract
632,286. Audible and like signalling apparatus. SUBMARINE SIGNAL CO. June 29, 1943, No. 10567. Convention date, Aug. 2, 1939. [Class 118 (ii)] [Also in Group XXXIX] Apparatus for transmitting or receiving compressional waves by means of a circular radiating surface having linear dimensions large compared with the wave-length is designed so that the vibrational amplitude of the elemental parts of the surface is uniform along each line 5 parallel to a given diameter but decreases progressively across the surface from the diameter to the circumference in such a way as to produce a radiation pattern in polar co-ordinates substantially limited to a plane perpendicular to the parallel lines 5 and having in that plane a main central lobe and considerably reduced subsidiary lobes on each side. The Specification contains a mathematical formula connecting amplitude and distance from the main diameter and a graphical method for determining the desired amplitude distribution. In the construction shown, a large number of magneto-strictive oscillators 3 are fixed in parallel rows to the radiating surface and the number of ampere turns in the exciting coils is the same for each row but differs in different rows. Specifications 632,284 and 632,285 are referred to. The Specification as open to inspection under Sect. 91 states also that the same effect may be produced by the use of a radiating or receiving surface vibrating with uniform amplitude but shaped so as to taper in a direction perpendicular to the central elemental row, e.g. a diamond or square. This subject-matter does not appear in the Specification as accepted.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US632286XA | 1939-08-02 | 1939-08-02 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB632286A true GB632286A (en) | 1949-11-21 |
Family
ID=22047820
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB10567/43A Expired GB632286A (en) | 1939-08-02 | 1943-06-29 | Improvements in or relating to apparatus for transmitting and receiving compressional wave energy |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB632286A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2190561A (en) * | 1986-05-12 | 1987-11-18 | Plessey Co Plc | Acoustic transducer |
-
1943
- 1943-06-29 GB GB10567/43A patent/GB632286A/en not_active Expired
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2190561A (en) * | 1986-05-12 | 1987-11-18 | Plessey Co Plc | Acoustic transducer |
| GB2190561B (en) * | 1986-05-12 | 1989-12-20 | Plessey Co Plc | Acoustic transducer |
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