Patent US3584244A successfully refreshed from Google Patents.
US3584244A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Oscillator circuit for an ultrasonic cleaner, utilizing a saturable core transformer
Assignee: Clevite Corp
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Filing: 1969-06-10
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Granted: 1971-06-08
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Expires: 1989-06-10
Abstract
Abstract A piezoelectric transducer for an ultrasonic cleaner is driven by a switching circuit having transistors connected in series. The transducer is connected in series with one transistor and the primary winding of a saturable core transformer providing feedback to the bases of the transistors.
Inventors
- 👤 Gary W Vest
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 12:30
CPC Classifications
B; B06; B06B; B06B1/00; B06B1/02; B06B1/0207; B06B1/0223; B06B1/0238; B06B1/0246; B06B1/0253; B06B2201/00; B06B2201/50; B06B2201/55; B06B2201/70; B06B2201/71
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
58 words
An oscillator comprising in combination a resonant transducer, electric power supply terminals, switch means having an element in circuit with said power supply terminals and said transducer, such switch means having control means, a feedback transformer having a saturable core, a primary winding means in circuit with the transducer, and secondary winding means coupled to the control means.
Claim 2
Dependent Claim
58 words
An oscillator comprising in combination a resonant transducer, electric power supply terminals, switch means having an element in circuit with said power supply terminals and said transducer, such switch means having control means, a feedback transformer having a saturable core, a primary winding means in circuit with the transducer, and secondary winding means coupled to the control means.
Claim 3
Dependent Claim
55 words
An oscillator as described in claim 1, in which the switch means comprises a pair of transistors in series with the power supply terminals, the transistors having bases constituting control means therefore and the secondary winding means comprise a pair of secondary windings each connected to one of said bases but with opposite polarity relationship.
Claim 4
Dependent Claim
16 words
An oscillator as described in claim 1 provided with means for shifting phase to regulate power.
Claim 5
Dependent Claim
15 words
An oscillator as described in claim 2 provided with means for regulating the power limit.
Claim 6
Dependent Claim
20 words
An oscillator as described in claim 3 wherein means are provided for shifting the frequency of operation to regulate impedance.
Claim 7
Dependent Claim
67 words
An oscillator as described in claim 5, wherein voltage is applied to the power supply terminals, and the relationship between voltage at the power supply terminals and the number of primary windings turns is chosen to give a rate of saturation of the saturable core transformer such that saturation time is of the order of magnitude of the duration of a cycle of the transducer resonant frequency.
Claim 8
Dependent Claim
42 words
An oscillator as described in claim 5 wherein at normal operation the circuit constants are adjusted to cause the time required to saturate the core of the transformer to correspond approximately to a half-cycle of the series resonant circuit of the transducer.
Claim 9
Dependent Claim
51 words
An oscillator as described in claim 7 wherein the time required to saturate the core of the transformer is slightly shorter than one-half cycle of the series resonant circuit so as to cause the circuit to operate on the high frequency side of the curve of transducer impedance plotted against frequency.
Claim 10
Dependent Claim
30 words
An oscillator as described in claim 1 wherein the impedance of the transducer is large in comparison with the impedance appearing across the primary winding of the saturable core transformer.
Claim 11
Dependent Claim
38 words
An oscillator as described in claim 9 wherein the ratio of impedance of the transducer to the impedance at the primary winding of the saturable core transformer is of the order of between 15 and 30 to 1.
References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-06-07 | 1974-12-07 | 1975-06-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-06-07 | 1978-12-07 | 1979-06-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-06-07 | 1982-12-07 | 1983-06-08 | $7700.00 | Window Closed / Lapsed |