US4168916A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ultrasonic oscillator device and machine incorporating the device
Assignee: Stanley Electric Co Ltd
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Filing: 1978-03-24
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Granted: 1979-09-25
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Expires: 1998-03-24
Abstract
Abstract An ultrasonic oscillator device which has automatic gain control and which comprises a phase detector for detecting the phase difference between a load voltage and varying quantities indicating an operational condition of the load. The device further comprises a voltage control oscillator adapted to control an oscillating frequency through a direct current voltage corresponding to the phase difference. Further, the ultrasonic oscillator device is combined with a vibrator driven thereby and a small sized motor having a fan to forcedly cool the vibrator. The vibrator and the fan are accommodated in a housing, the size of which is made small, to produce a compact type machine.
Inventors
- 👤 Shohachi Yamada
- 👤 Akira Nishi
- 👤 Kouichi Mishima
- 👤 Youichiro Akanuma
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 04:10
CPC Classifications
B; B06; B06B; B06B1/00; B06B1/02; B06B1/0207; B06B1/0223; B06B1/0238; B06B1/0246; B06B1/0261; H; H03; H03L; H03L7/00; H03L7/02
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
189 words
An ultrasonic oscillator device comprising an ultrasonic vibrator coupled to a load; means for coupling a driving voltage to said ultrasonic vibrator; means for detecting at least one electrical quantity indicating an operational condition of the load; a phase comparator for detecting a phase difference between said driving voltage and said at least one electrical quantity indicating an operational condition of the load; means for developing a direct current voltage corresponding to said detected phase difference; a voltage control oscillator means coupled to said developing means and having an oscillating frequency which is a function of said direct current voltage corresponding to said phase difference; means for comparing a reference value with a magnitude of said at least one electrical quantity indicating the operational condition of said load and for obtaining a difference signal therebetween; and a variable gain amplifier for amplifying the output of said voltage control oscillator means, said difference signal being coupled to said variable gain amplifier as the control signal of said variable gain amplifier to vary the gain thereof, said driving voltage coupling means being coupled to the output of said variable gain amplifier.
Claim 2
Dependent Claim
189 words
An ultrasonic oscillator device comprising an ultrasonic vibrator coupled to a load; means for coupling a driving voltage to said ultrasonic vibrator; means for detecting at least one electrical quantity indicating an operational condition of the load; a phase comparator for detecting a phase difference between said driving voltage and said at least one electrical quantity indicating an operational condition of the load; means for developing a direct current voltage corresponding to said detected phase difference; a voltage control oscillator means coupled to said developing means and having an oscillating frequency which is a function of said direct current voltage corresponding to said phase difference; means for comparing a reference value with a magnitude of said at least one electrical quantity indicating the operational condition of said load and for obtaining a difference signal therebetween; and a variable gain amplifier for amplifying the output of said voltage control oscillator means, said difference signal being coupled to said variable gain amplifier as the control signal of said variable gain amplifier to vary the gain thereof, said driving voltage coupling means being coupled to the output of said variable gain amplifier.
Claim 3
Dependent Claim
30 words
An ultrasonic device according to claim 1, wherein said variable gain amplifier comprises means for providing a variable resistance characteristic of a field effect transistor due to said variable gain.
Claim 4
Dependent Claim
54 words
An ultrasonic device according to claim 1 further comprising: a vibrator fixed in a housing and coupled as said load to said ultrasonic vibrator; a plurality of air bores formed in said housing; a small-sized motor disposed above said vibrator in said housing; and a fan mounted on a rotating shaft of said motor.
Claim 5
Dependent Claim
55 words
An ultrasonic device according to claim 3 comprising a plurality of said bores above and below said vibrator; and passageway means in said housing extending between said bores above and below said vibrator and to said fan for cooling said vibrator by air flowing through said passageway and bores under the influence of said fan.
Claim 6
Dependent Claim
64 words
An ultrasonic device according to claim 1 further comprising: a phase adjustor coupling at least one of said driving voltage and at least one electrical quantity to said phase comparator; and a zero point detector coupling at least one of said driving voltage and at least one electrical quantity to said phase comparator to convert a sinusoidal wave signal into a rectangular wave signal.
Claim 7
Dependent Claim
35 words
An ultrasonic device according to claim 5 wherein said phase adjustor couples said driving voltage to said phase comparator and said zero point detector couples said at least one electrical quantity to said phase comparator.
Claim 8
Dependent Claim
160 words
An ultrasonic oscillator device comprising an ultrasonic vibrator coupled to a load; means for coupling a driving voltage to said ultrasonic vibrator; means for detecting at least one electrical quantity indicating an operational condition of the load; a phase comparator for detecting a phase difference between said driving voltage and said at least one electrical quantity indicating an operational condition of the load; a phase adjustor coupling at least one of said driving voltage and at least one electrical quantity to said phase comparator; a zero point detector coupling at least one of said driving voltage and at least one electrical quantity to said phase comparator to convert a sinusoidal wave signal into a rectangular wave signal; means for developing a direct current voltage corresponding to said detected phase difference; and a voltage control oscillator means coupled to said developing means and having an oscillating frequency which is a function of said direct current voltage corresponding to said phase difference.
Claim 9
Dependent Claim
160 words
An ultrasonic oscillator device comprising an ultrasonic vibrator coupled to a load; means for coupling a driving voltage to said ultrasonic vibrator; means for detecting at least one electrical quantity indicating an operational condition of the load; a phase comparator for detecting a phase difference between said driving voltage and said at least one electrical quantity indicating an operational condition of the load; a phase adjustor coupling at least one of said driving voltage and at least one electrical quantity to said phase comparator; a zero point detector coupling at least one of said driving voltage and at least one electrical quantity to said phase comparator to convert a sinusoidal wave signal into a rectangular wave signal; means for developing a direct current voltage corresponding to said detected phase difference; and a voltage control oscillator means coupled to said developing means and having an oscillating frequency which is a function of said direct current voltage corresponding to said phase difference.
Claim 10
Dependent Claim
35 words
An ultrasonic device according to claim 7 wherein said phase adjustor couples said driving voltage to said phase comparator and said zero point detector couples said at least one electrical quantity to said phase comparator.
Claim 11
Dependent Claim
84 words
An ultrasonic device according to claims 7 or 8 further comprising: a rectifying detector circuit coupled to receive said at least one electrical quantity for generating a rectified output; means for comparing said rectified output of said detector circuit with a reference signal for generating a difference voltage; and means for applying said difference voltage to said variable gain amplifier as a control voltage to control the gain thereof; said driving voltage coupling means being coupled to the output of said variable gain amplifier.
Claim 12
Dependent Claim
16 words
An ultrasonic device according to claim 9 wherein said applying means comprises a time constant circuit.
Claim 13
Dependent Claim
148 words
An ultrasonic oscillator device comprising an ultrasonic vibrator; means for coupling a driving voltage to said ultrasonic vibrator; a vibrator fixed in a housing and coupled to said ultrasonic vibrator as a load; a plurality of air bores formed in said housing; a small-sized motor disposed above said vibrator in said housing; a fan mounted on a rotating shaft of said motor; means for detecting at least one electrical quantity indicating an operational condition of said vibrator load; a phase comparator for detecting a phase difference between said driving voltage and said at least one electrical quantity indicating an operational condition of said vibrator load; means for developing a direct current voltage corresponding to said detected phase difference; and a voltage control oscillator means coupled to said developing means and having an oscillating frequency which is a function of said direct current voltage corresponding to said phase difference.
Claim 14
Dependent Claim
148 words
An ultrasonic oscillator device comprising an ultrasonic vibrator; means for coupling a driving voltage to said ultrasonic vibrator; a vibrator fixed in a housing and coupled to said ultrasonic vibrator as a load; a plurality of air bores formed in said housing; a small-sized motor disposed above said vibrator in said housing; a fan mounted on a rotating shaft of said motor; means for detecting at least one electrical quantity indicating an operational condition of said vibrator load; a phase comparator for detecting a phase difference between said driving voltage and said at least one electrical quantity indicating an operational condition of said vibrator load; means for developing a direct current voltage corresponding to said detected phase difference; and a voltage control oscillator means coupled to said developing means and having an oscillating frequency which is a function of said direct current voltage corresponding to said phase difference.
Claim 15
Dependent Claim
55 words
An ultrasonic device according to claim 11 comprising a plurality of said bores above and below said vibrator; and passageway means in said housing extending between said bores above and below said vibrator and to said fan for cooling said vibrator by air flowing through said passageway and bores under the influence of said fan.
Claim 16
Dependent Claim
64 words
An ultrasonic device according to claim 11 further comprising: a phase adjustor coupling at least one of said driving voltage and at least one electrical quantity to said phase comparator; and a zero point detector coupling at least one of said driving voltage and at least one electrical quantity to said phase comparator to convert a sinusoidal wave signal into a rectangular wave signal.
Claim 17
Dependent Claim
35 words
An ultrasonic device according to claim 13 wherein said phase adjustor couples said driving voltage to said phase comparator and said zero point detector couples said at least one electrical quantity to said phase comparator.
References Cited (Backward Citations)
US3826993A
Cited
US3771772A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1982-09-24 | 1983-03-26 | 1983-09-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-09-24 | 1987-03-26 | 1987-09-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-09-24 | 1991-03-26 | 1991-09-25 | $7700.00 | Window Closed / Lapsed |