US3813616A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electromechanical oscillator
Assignee: Valeo Engine Cooling Inc
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Filing: 1973-03-22
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Granted: 1974-05-28
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Expires: 1993-03-22
Abstract
Abstract An electromechanical oscillator comprises an electronic amplifier driving an electromechanical transducer which includes a pair of like transducer units affixed to a bar having with the transducers natural frequencies of vibration. The units are affixed so that one of them is nearer a node than the other. An impedance is connected in series with each transducer unit, and the two series circuits are connected in parallel. The voltage across the two transducer unit-impedance junctions is fed back into the input of the electronic amplifier.
Inventors
- 👤 J Antonevich
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 17:26
CPC Classifications
B; B06; B06B; B06B1/00; B06B1/02; B06B1/0207; B06B1/0223; B06B1/0238; B06B1/0246; B06B1/0261; H; H03; H03B; H03B5/00; H03B5/30; H03B5/32; H03B5/323
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
114 words
An electromechanical oscillator comprising a bar having a natural frequency of vibration, a pair of series connected like two terminal transducer units for converting electricl energy to mechanical motion affixed to the bar, one such unit being positioned nearer to a node on the bar than the other unit, a transducer transformer having its primary winding connected in series with the transducer units, an electronic amplifier having an output transformer, means connecting the secondary winding of the output transformer to the common terminal of the series connected transducer units and a center tap on the transducer transformer primary winding, and means connecting the transducer transformer secondary winding with the input to the electronic amplifier.
Claim 2
Dependent Claim
114 words
An electromechanical oscillator comprising a bar having a natural frequency of vibration, a pair of series connected like two terminal transducer units for converting electricl energy to mechanical motion affixed to the bar, one such unit being positioned nearer to a node on the bar than the other unit, a transducer transformer having its primary winding connected in series with the transducer units, an electronic amplifier having an output transformer, means connecting the secondary winding of the output transformer to the common terminal of the series connected transducer units and a center tap on the transducer transformer primary winding, and means connecting the transducer transformer secondary winding with the input to the electronic amplifier.
Claim 3
Dependent Claim
12 words
Apparatus of claim 1 in which the transducer units are piezoelectric units.
Claim 4
Dependent Claim
40 words
Apparatus of claim 1 in which the means connecting the secondary winding of the output transformer to the common terminal of the series connected transducer units and a center tap on the transducer transformer primary winding include phase correcting elements.
Claim 5
Dependent Claim
66 words
Apparatus of claim 3 in which the phase correcting elements comprise an inductance in series with the output transformer secondary winding and a capacitance in parallel with the common lead of the transducer units and the center tap of the output transformer primary winding, the inductance and capacitance being adjusted to tune the output transformer to an anti-resonant frequency of the prismatic bar and transducer units.
Claim 6
Dependent Claim
49 words
Apparatus of claim 3 in which the phase correcting elements comprise an inductance and capacitance connected in parallel across the secondary winding of the output transformer, the inductance and capacitance being adjusted to tune the output transformer to the mechanical resonant frequency of the prismatic bar and transducer units.
References Cited (Backward Citations)
US3432691A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-05-27 | 1977-11-26 | 1978-05-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-05-27 | 1981-11-26 | 1982-05-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-05-27 | 1985-11-26 | 1986-05-28 | $7700.00 | Window Closed / Lapsed |