Patent US2388555A successfully refreshed from Google Patents.
US4020446A
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Ultrasonic wave transmitting system
Assignee: Furuno Electric Co Ltd
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Filing: 1975-09-16
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Granted: 1977-04-26
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Expires: 1995-09-16
Abstract
Abstract Apparatus for controlling the angular direction of wave transmission of an ultrasonic transmitting system having a plurality of uniformly spaced transducers which includes means for successively shifting the phase of the signals emitted by each transducer and providing means for controlling the magnitude of the phase shift to alter the angle of transmission.
Inventors
- 👤 Masajiro Iida
- 👤 Hideharu Morimatsu
- 👤 Itsuo Fukuoka
- 👤 Yoshinari Yoshida
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 19:39
CPC Classifications
G; G10; G10K; G10K11/00; G10K11/18; G10K11/26; G10K11/34; G10K11/341; G10K11/345
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
192 words
An ultrasonic wave transmitting system, comprising a plurality of ultrasonic transducers having a common resonance frequency and being arranged side by side in a row at fixed intervals, a first clock pulse generator for generating a first train of clock pulses having a higher harmonic relationship with said common frequency, a plurality of frequency dividers having reset inputs respectively, the inputs of said frequency dividers being supplied from said first clock pulse generator and the outputs thereof being connected to said ultrasonic transducers respectively, a second clock pulse generator having frequency control means for generating a second train of clock pulses, and resetting means connected to said second clock pulse generator for resetting said frequency dividers sequentially at a time interval equal to the period of said second train of clock pulses, said resetting means comprising a device for generating a reset signal consisting of a sole pulse, and a shift register having a normal input connected to the output of said reset signal generating device, a shift input connected to the output of said second clock pulse generator and parallel outputs connected respectively to said reset inputs of said frequency dividers.
Claim 2
Dependent Claim
192 words
An ultrasonic wave transmitting system, comprising a plurality of ultrasonic transducers having a common resonance frequency and being arranged side by side in a row at fixed intervals, a first clock pulse generator for generating a first train of clock pulses having a higher harmonic relationship with said common frequency, a plurality of frequency dividers having reset inputs respectively, the inputs of said frequency dividers being supplied from said first clock pulse generator and the outputs thereof being connected to said ultrasonic transducers respectively, a second clock pulse generator having frequency control means for generating a second train of clock pulses, and resetting means connected to said second clock pulse generator for resetting said frequency dividers sequentially at a time interval equal to the period of said second train of clock pulses, said resetting means comprising a device for generating a reset signal consisting of a sole pulse, and a shift register having a normal input connected to the output of said reset signal generating device, a shift input connected to the output of said second clock pulse generator and parallel outputs connected respectively to said reset inputs of said frequency dividers.
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) | 1980-04-25 | 1980-10-25 | 1981-04-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-04-25 | 1984-10-25 | 1985-04-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-04-25 | 1988-10-25 | 1989-04-26 | $7700.00 | Window Closed / Lapsed |