GB1513200A - Apparatus for generating frequency modulated acoustic vibrations under water - Google Patents
Apparatus for generating frequency modulated acoustic vibrations under waterInfo
- Publication number
- GB1513200A GB1513200A GB52327/76A GB5232776A GB1513200A GB 1513200 A GB1513200 A GB 1513200A GB 52327/76 A GB52327/76 A GB 52327/76A GB 5232776 A GB5232776 A GB 5232776A GB 1513200 A GB1513200 A GB 1513200A
- Authority
- GB
- United Kingdom
- Prior art keywords
- transducer
- under water
- frequency modulated
- acoustic vibrations
- generating frequency
- 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
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B11/00—Transmission systems employing sonic, ultrasonic or infrasonic waves
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Transducers For Ultrasonic Waves (AREA)
- Physical Water Treatments (AREA)
- Magnetic Resonance Imaging Apparatus (AREA)
- Water Treatment By Electricity Or Magnetism (AREA)
Abstract
1513200 Underwater telephony EFA ELEKTROFUNKGERATE AG 15 Dec 1976 [17 Dec 1975] 52327/76 Heading G4F In an underwater telephone transmitter two monostable RC multivibrator circuits are interconnected, the microphone electric output is fed into at least one RC circuit to modulate the pulse train frequency, and the modulated pulse train is emitted via a piezo-electric transducer. A pulse-to-sinusoid circuit may precede the transducer. The transducer may be switched to act also as the input transducer of an appropriate receiver.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CH1634875A CH588789A5 (en) | 1975-12-17 | 1975-12-17 |
Publications (1)
Publication Number | Publication Date |
---|---|
GB1513200A true GB1513200A (en) | 1978-06-07 |
Family
ID=4416556
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB52327/76A Expired GB1513200A (en) | 1975-12-17 | 1976-12-15 | Apparatus for generating frequency modulated acoustic vibrations under water |
Country Status (13)
Country | Link |
---|---|
JP (1) | JPS5286761A (en) |
AU (1) | AU504754B2 (en) |
BR (1) | BR7608462A (en) |
CH (1) | CH588789A5 (en) |
DE (1) | DE2656969A1 (en) |
DK (1) | DK565876A (en) |
ES (1) | ES454180A1 (en) |
FI (1) | FI763585A (en) |
FR (1) | FR2336006A1 (en) |
GB (1) | GB1513200A (en) |
NL (1) | NL7613846A (en) |
NO (1) | NO764241L (en) |
ZA (1) | ZA767342B (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2119980A (en) * | 1982-05-11 | 1983-11-23 | Madelyn Carrol Freeman | A device for use by a diver to give a signal |
AU656756B2 (en) * | 1991-01-04 | 1995-02-16 | Jorgen Brosow | Signal-transmission method and device |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5413748U (en) * | 1977-06-30 | 1979-01-29 |
-
1975
- 1975-12-17 CH CH1634875A patent/CH588789A5/xx not_active IP Right Cessation
-
1976
- 1976-12-08 FR FR7636988A patent/FR2336006A1/en active Granted
- 1976-12-09 ZA ZA767342A patent/ZA767342B/en unknown
- 1976-12-10 AU AU20464/76A patent/AU504754B2/en not_active Expired
- 1976-12-13 NL NL7613846A patent/NL7613846A/en not_active Application Discontinuation
- 1976-12-13 ES ES454180A patent/ES454180A1/en not_active Expired
- 1976-12-14 FI FI763585A patent/FI763585A/fi not_active Application Discontinuation
- 1976-12-14 NO NO764241A patent/NO764241L/no unknown
- 1976-12-15 GB GB52327/76A patent/GB1513200A/en not_active Expired
- 1976-12-16 DK DK565876A patent/DK565876A/en not_active Application Discontinuation
- 1976-12-16 BR BR7608462A patent/BR7608462A/en unknown
- 1976-12-16 DE DE19762656969 patent/DE2656969A1/en not_active Withdrawn
- 1976-12-16 JP JP15183076A patent/JPS5286761A/en active Pending
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2119980A (en) * | 1982-05-11 | 1983-11-23 | Madelyn Carrol Freeman | A device for use by a diver to give a signal |
AU656756B2 (en) * | 1991-01-04 | 1995-02-16 | Jorgen Brosow | Signal-transmission method and device |
Also Published As
Publication number | Publication date |
---|---|
FR2336006B3 (en) | 1979-01-19 |
DE2656969A1 (en) | 1977-07-07 |
JPS5286761A (en) | 1977-07-19 |
DK565876A (en) | 1977-06-18 |
NO764241L (en) | 1977-06-20 |
ES454180A1 (en) | 1977-12-01 |
FI763585A (en) | 1977-06-18 |
AU2046476A (en) | 1978-06-15 |
CH588789A5 (en) | 1977-06-15 |
AU504754B2 (en) | 1979-10-25 |
BR7608462A (en) | 1977-11-29 |
ZA767342B (en) | 1977-11-30 |
NL7613846A (en) | 1977-06-21 |
FR2336006A1 (en) | 1977-07-15 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
PS | Patent sealed [section 19, patents act 1949] | ||
PCNP | Patent ceased through non-payment of renewal fee |