Patent US4579000A successfully refreshed from Google Patents.
US4579000A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for detecting ultrasonic vibration
Assignee: SONOTEC CO Ltd
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Filing: 1984-06-21
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Granted: 1986-04-01
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Expires: 2004-06-21
Abstract
Abstract This invention is an apparatus for detecting the vibration of a Langevin type electrostrictive ultrasonic vibrator comprising a system made up of an iron core, a coil and a magnet surrounding but not connected to a magnetic projection attached to the rear end of the vibrator. The vibration of the magnetic projection is detected by the system surrounding it and the resulting induced voltage is fed back to a control to maintain the vibration at the desired resonant frequency.
Inventors
- 👤 Naohiko Sudo
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 18:27
CPC Classifications
G; G01; G01H; G01H11/00; G01H11/02
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
129 words
In a Langevin type electrostrictive ultrasonic vibrator with an ultrasonic projecting horn: an apparatus for detecting ultrasonic vibration comprising a system including an iron core having a coil connected to a vibrating control device and a magnet which reacts and effects the circuit with said iron core and coil, said system surrounding but being isolated from a projection made of a magnetic material which vibrates integrally with said vibrator at the end opposite from the ultrasonic projecting horn and which projects into a center of said coil and said system further being isolated from said vibrator, resulting in induced voltage in the coil excited by vibration of said magnetic projection being detected and fed back to a vibration control device to keep the vibration at the desired resonant frequency.
Claim 2
Dependent Claim
129 words
In a Langevin type electrostrictive ultrasonic vibrator with an ultrasonic projecting horn: an apparatus for detecting ultrasonic vibration comprising a system including an iron core having a coil connected to a vibrating control device and a magnet which reacts and effects the circuit with said iron core and coil, said system surrounding but being isolated from a projection made of a magnetic material which vibrates integrally with said vibrator at the end opposite from the ultrasonic projecting horn and which projects into a center of said coil and said system further being isolated from said vibrator, resulting in induced voltage in the coil excited by vibration of said magnetic projection being detected and fed back to a vibration control device to keep the vibration at the desired resonant frequency.
Claim 3
Dependent Claim
17 words
An apparatus for detecting ultrasonic vibration according to claim 1, wherein said projection is made of steel.
Claim 4
Dependent Claim
116 words
In a Langevin type electrostrictive ultrasonic vibrator with an ultrasonic projecting horn: a method for detecting ultrasonic vibration in which a system comprising an iron core having a coil connected to a vibration control device and a reacting magnet creating a circuit with said iron core and coil surrounding but isolated from a projection made of a magnetic substance vibrating integrally with the vibrator placed at the end of the vibrator opposite from the ultrasonic projecting horn and which projects into said coil, the system detecting an induced voltage excited in said system by the vibration and feeding back the induced voltage to a vibration control device to keep the vibration at the desired resonant frequency.
Claim 5
Dependent Claim
116 words
In a Langevin type electrostrictive ultrasonic vibrator with an ultrasonic projecting horn: a method for detecting ultrasonic vibration in which a system comprising an iron core having a coil connected to a vibration control device and a reacting magnet creating a circuit with said iron core and coil surrounding but isolated from a projection made of a magnetic substance vibrating integrally with the vibrator placed at the end of the vibrator opposite from the ultrasonic projecting horn and which projects into said coil, the system detecting an induced voltage excited in said system by the vibration and feeding back the induced voltage to a vibration control device to keep the vibration at the desired resonant frequency.
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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) | 1989-03-31 | 1989-09-30 | 1990-04-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-03-31 | 1993-09-30 | 1994-04-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-03-31 | 1997-09-30 | 1998-04-01 | $7700.00 | Window Closed / Lapsed |