Patent US3680841A successfully refreshed from Google Patents.
US3680841A
Expired / Lapsed
US
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Liquid characteristic measuring instrument
Assignee: Yokogawa Electric Corp
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Filing: 1970-06-23
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Granted: 1972-08-01
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Expires: 1990-06-23
Abstract
Abstract A liquid characteristic measuring instrument having a container enclosing a liquid to be measured, an ultrasonic vibrator, and means for transmitting ultrasonic waves from the vibrator to the liquid in the container, in which precipitation of scale of the liquid being measured is prevented by the ultrasonic waves to ensure accurate measurement.
Inventors
- 👤 Eiichi Yagi
- 👤 Kenko Kojima
- 👤 Hisayuki Ikeda
- 👤 Shiro Yauchi
- 👤 Tsutomu Shimizu
- 👤 Tokutaro Tamate
- 👤 Hiroyuki Ikegawa
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 18:13
CPC Classifications
B; B08; B08B; B08B3/00; B08B3/04; B08B3/10; B08B3/12; G; G01; G01N; G01N27/00; G01N27/02; G01N27/04; G01N27/06; G01N27/26; G01N27/28; G01N27/30; G01N27/38; G01N2291/00; G01N2291/02; G01N2291/028; G01N2291/02863
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
99 words
A liquid characteristic measuring instrument comprising a container having a liquid therein whose characteristic is to be measured, said liquid having a tendency to deposit a material therefrom which interferes with such measurement, at least one electrode capable of measuring such characteristic disposed in said liquid, a cover on said container, a protective tube secured to said cover and extending into said liquid, an ultrasonic vibrator located in said protective tube, and means for energizing said vibrator to emit ultrasonic waves into said liquid to inhibit substantially the tendency of said liquid to deposit such material on said electrode.
Claim 2
Dependent Claim
99 words
A liquid characteristic measuring instrument comprising a container having a liquid therein whose characteristic is to be measured, said liquid having a tendency to deposit a material therefrom which interferes with such measurement, at least one electrode capable of measuring such characteristic disposed in said liquid, a cover on said container, a protective tube secured to said cover and extending into said liquid, an ultrasonic vibrator located in said protective tube, and means for energizing said vibrator to emit ultrasonic waves into said liquid to inhibit substantially the tendency of said liquid to deposit such material on said electrode.
Claim 3
Dependent Claim
20 words
The instrument of claim 1 in which both said electrode and said protective tube are removably secured to said cover.
Claim 4
Dependent Claim
24 words
The instrument of claim 2 in which said protective tube includes a liquid for coupling the ultrasonic vibrations to the liquid in said container.
Claim 5
Dependent Claim
20 words
The instrument of claim 2 which includes a pair of electrodes, the protective tube being disposed between the two electrodes.
References Cited (Backward Citations)
US2470741A
Cited
US2635388A
Cited
US2729692A
Cited
US2800309A
Cited
US3402386A
Cited
US3351539A
Cited
US3443797A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-08-01 | 1976-01-31 | 1976-08-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-08-01 | 1980-01-31 | 1980-08-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-08-01 | 1984-01-31 | 1984-08-01 | $7700.00 | Window Closed / Lapsed |