US3721949A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Echo repeater target
Assignee: United States Department of the Navy
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Filing: 1964-09-30
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Granted: 1973-03-20
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Expires: 1984-09-30
Abstract
Abstract 1. In combination in a system for driving a transducer with a predetermined capacity between terminals; AN AMPLIFIER; A SOURCE OF A RELATIVELY BROAD BOND OF FREQUENCIES FOR DRIVING SAID AMPLIFIER; AN INDUCTANCE WITH TERMINALS CONNECTED ACROSS THE OUTPUT OF SAID AMPLIFIER; THE IMPEDANCE BETWEEN SAID TERMINALS BEING MATCHED TO THE OUTPUT IMPEDANCE OF SAID AMPLIFIER FOR THE OPTIMUM TRANSFER OF POWER; A PARALLEL TUNED CIRCUIT COMPRISING A FIRST TUNING ELEMENT COUPLED ACROSS SAID INDUCTANCE TO PARALLEL TUNE SAID INDUCTANCE TO ANY FREQUENCY F within said band; A SERIES TUNED CIRCUIT COMPRISING A TUNING ELEMENT CONNECTED IN SERIES WITH SAID TRANSDUCER, SAID ELEMENT BEING OF PREDETERMINED REACTANCE TO SERIES TUNE SAID TRANSDUCER TO SAID FREQUENCY F; said series tuned circuit being coupled across said parallel tuned circuit so that the sign of the reactances of the series and the parallel circuits vary complementarily at frequencies above and below said frequency F.
Inventors
- 👤 W Hubbard
- 👤 K Geren
- 👤 W Sauer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 16:13
CPC Classifications
H; H03; H03F; H03F1/00; H03F1/02; H03F1/0205; G; G01; G01S; G01S15/00; G01S15/74; H03F1/56; H03F3/00; H03F3/26; H04; H04B; H04B11/00
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
149 words
In combination in a system for driving a transducer with a predetermined capacity between terminals; an amplifier; a source of a relatively broadband of frequencies for driving said amplifier; an inductance with terminals connected across the output of said amplifier; the impedance between said terminals being matched to the output impedance of said amplifier for the optimum transfer of power; a parallel tuned circuit comprising a first tuning element coupled across said inductance to parallel tune said inductance to any frequency F within said band; a series tuned circuit comprising a tuning element connected in series with said transducer, said element being of predetermined reactance to series tune said transducer to said frequency F; said series tuned circuit being coupled across said parallel tuned circuit so that the sign of the reactances of the series and the parallel circuits vary complementarily at frequencies above and below said frequency F.
Claim 2
Dependent Claim
149 words
In combination in a system for driving a transducer with a predetermined capacity between terminals; an amplifier; a source of a relatively broadband of frequencies for driving said amplifier; an inductance with terminals connected across the output of said amplifier; the impedance between said terminals being matched to the output impedance of said amplifier for the optimum transfer of power; a parallel tuned circuit comprising a first tuning element coupled across said inductance to parallel tune said inductance to any frequency F within said band; a series tuned circuit comprising a tuning element connected in series with said transducer, said element being of predetermined reactance to series tune said transducer to said frequency F; said series tuned circuit being coupled across said parallel tuned circuit so that the sign of the reactances of the series and the parallel circuits vary complementarily at frequencies above and below said frequency F.
Claim 3
Dependent Claim
157 words
In combination in a system for driving a transducer having reactive impedance between terminals; a pair of amplifiers connected in push-pull, a source of a relatively broad band of frequencies for driving said amplifiers; a center tapped inductance with terminals connected, respectively, to the output electrodes of said amplifiers, the impedance between said terminals being matched to the output impedance of said amplifiers for optimum transfer of power; a parallel tuned circuit comprising a tuning condenser coupled across said inductance to parallel tune said inductance to any frequency F within said band; a series tuned circuit comprising a tuning element connected in series with said transducer, said element being of predetermined reactance to series tune said transducer to said frequency F; said series tuned circuit being connected across said parallel tuned circuit so that the sign of the reactances of the series and the parallel circuits vary approximately complementarily at frequencies above and below said frequency F.
Claim 4
Dependent Claim
157 words
In combination in a system for driving a transducer having reactive impedance between terminals; a pair of amplifiers connected in push-pull, a source of a relatively broad band of frequencies for driving said amplifiers; a center tapped inductance with terminals connected, respectively, to the output electrodes of said amplifiers, the impedance between said terminals being matched to the output impedance of said amplifiers for optimum transfer of power; a parallel tuned circuit comprising a tuning condenser coupled across said inductance to parallel tune said inductance to any frequency F within said band; a series tuned circuit comprising a tuning element connected in series with said transducer, said element being of predetermined reactance to series tune said transducer to said frequency F; said series tuned circuit being connected across said parallel tuned circuit so that the sign of the reactances of the series and the parallel circuits vary approximately complementarily at frequencies above and below said frequency F.
Claim 5
Dependent Claim
32 words
The combination defined in claim 2 further comprising; a bandpass filter with a center frequency for passing said broad band of frequencies; said filter being connected to the input of said amplifiers.
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) | 1976-03-19 | 1976-09-18 | 1977-03-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-03-19 | 1980-09-18 | 1981-03-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-03-19 | 1984-09-18 | 1985-03-20 | $7700.00 | Window Closed / Lapsed |