GB1214050A - A system for activating a remote underwater device - Google Patents
A system for activating a remote underwater deviceInfo
- Publication number
- GB1214050A GB1214050A GB4991068A GB4991068A GB1214050A GB 1214050 A GB1214050 A GB 1214050A GB 4991068 A GB4991068 A GB 4991068A GB 4991068 A GB4991068 A GB 4991068A GB 1214050 A GB1214050 A GB 1214050A
- Authority
- GB
- United Kingdom
- Prior art keywords
- frequencies
- gate
- transmitter
- signal
- oscillators
- 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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
- B63G—OFFENSIVE OR DEFENSIVE ARRANGEMENTS ON VESSELS; MINE-LAYING; MINE-SWEEPING; SUBMARINES; AIRCRAFT CARRIERS
- B63G7/00—Mine-sweeping; Vessels characterised thereby
- B63G7/02—Mine-sweeping means, Means for destroying mines
- B63G7/08—Mine-sweeping means, Means for destroying mines of acoustic type
-
- G—PHYSICS
- G08—SIGNALLING
- G08C—TRANSMISSION SYSTEMS FOR MEASURED VALUES, CONTROL OR SIMILAR SIGNALS
- G08C23/00—Non-electrical signal transmission systems, e.g. optical systems
- G08C23/02—Non-electrical signal transmission systems, e.g. optical systems using infrasonic, sonic or ultrasonic waves
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Acoustics & Sound (AREA)
- Engineering & Computer Science (AREA)
- Aviation & Aerospace Engineering (AREA)
- Selective Calling Equipment (AREA)
- Measurement Of Velocity Or Position Using Acoustic Or Ultrasonic Waves (AREA)
Abstract
1,214,050. Acoustic signalling. RAYTHEON CO. 21 Oct., 1968 [1 Nov., 1967] No. 49910/68. Heading G4F. In a frequency coded system for activating a remote underwater device, a receiver is arranged to respond only to the presence of at least one "assertion" frequency f A , f D and to the absence of other "negation" frequencies f B , f c . The transmitter (Fig. 2A, not shown) may comprise four oscillators each coupled via respective AND gates to two amplifiers feeding transmitting transducers. The AND gates are arranged so that one transducer first transmits frequencies from two of the oscillators whilst the second transducer later transmits frequencies from the other two i.e. providing the logical complement of the first signal. Receiver.-In Fig. 2B the receiving transducer 50 is housed in a pressure proof lead zirconate titanate sphere and its output is separated by filters 56-59 into four channels 60-63 corresponding to the frequencies of the four oscillators in the transmitter. After detection and further filtering at 71-74 the outputs of channels 60 and 62 are fed to AND gate 79 together with the outputs from channels 61 and 63, after inversion at 76, 78. AND gate 79 thus only provides an output following reception of the first signal from the transmitter i.e. in the presence of frequencies f A and f D and the absence of frequencies f B and f c . After a delay due to one shot multivibrator 82, a signal is supplied on one input 97 of a further AND gate 84 for a period determined by a second multivibrator 83. If, at this time the complementary second signal is received from the transmitter, then an output from AND gate 80 will pass AND gate 84 so as to operate a relay, motor, radio transmitter, valve or to detonate an explosive. The system may be arranged to transmit different codes corresponding to various control functions.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US67978567A | 1967-11-01 | 1967-11-01 |
Publications (1)
Publication Number | Publication Date |
---|---|
GB1214050A true GB1214050A (en) | 1970-11-25 |
Family
ID=24728355
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB4991068A Expired GB1214050A (en) | 1967-11-01 | 1968-10-21 | A system for activating a remote underwater device |
Country Status (6)
Country | Link |
---|---|
BE (1) | BE723031A (en) |
DE (1) | DE1804398C3 (en) |
FR (1) | FR1586552A (en) |
GB (1) | GB1214050A (en) |
NL (1) | NL157123B (en) |
NO (1) | NO125252B (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2117948A (en) * | 1982-03-22 | 1983-10-19 | Ml Aviation Co Ltd | Initiation of devices by high- frequency sound waves |
GB2230883A (en) * | 1989-03-18 | 1990-10-31 | Allan Robert Edwards | Tone decoders |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2207396B1 (en) * | 1972-11-17 | 1976-10-29 | Charbonnages De France |
-
1968
- 1968-10-21 GB GB4991068A patent/GB1214050A/en not_active Expired
- 1968-10-22 DE DE19681804398 patent/DE1804398C3/en not_active Expired
- 1968-10-28 BE BE723031D patent/BE723031A/xx not_active IP Right Cessation
- 1968-10-28 FR FR1586552D patent/FR1586552A/fr not_active Expired
- 1968-10-31 NL NL6815549A patent/NL157123B/en not_active IP Right Cessation
- 1968-10-31 NO NO432768A patent/NO125252B/no unknown
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2117948A (en) * | 1982-03-22 | 1983-10-19 | Ml Aviation Co Ltd | Initiation of devices by high- frequency sound waves |
GB2230883A (en) * | 1989-03-18 | 1990-10-31 | Allan Robert Edwards | Tone decoders |
Also Published As
Publication number | Publication date |
---|---|
FR1586552A (en) | 1970-02-20 |
DE1804398A1 (en) | 1969-07-24 |
BE723031A (en) | 1969-04-01 |
NO125252B (en) | 1972-08-07 |
DE1804398C3 (en) | 1979-04-26 |
NL6815549A (en) | 1969-05-05 |
NL157123B (en) | 1978-06-15 |
DE1804398B2 (en) | 1978-08-31 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
PS | Patent sealed | ||
PCNP | Patent ceased through non-payment of renewal fee |