US4559813A
Expired / Lapsed
US
⏱️ 0.0 years remaining
System and device for detecting the forming of depot
Assignee: IHC Holland NV
•
Filing: 1984-05-10
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Granted: 1985-12-24
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Expires: 2004-05-10
Abstract
Abstract System for detecting the forming of depot inside a transport channel for transporting particles in a light transparent carrier fluid, comprising a light transmitter, a light receiver, a bifurcated glass fibre cable of which an end is installed in the wall of a transport channel. One branch of the cable is coupled to the light transmitter and the other branch is coupled to the light receiver, and the output of the light receiver is connected to a discriminator circuit comprising a converter for converting the effective ac voltage component in the received signal into a dc voltage component and a comparator in which the dc voltage signal is compared with a predetermined threshold signal, which discriminator circuit is coupled to a visual indicator unit.
Inventors
- 👤 Henricus J. P. M. Brekelmans
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 20:02
CPC Classifications
B; B65; B65G; B65G53/00; B65G53/34; B65G53/52; B65G53/521; G; G01; G01F; G01F1/00; G01F1/66; G01F1/661; G01P; G01P13/00; G01P13/008; G01P13/0086
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
116 words
System for detecting the forming of depot inside a transport channel for transporting particles in a light transparent carrier fluid, comprising a light transmitter, a light receiver, a bifurcated glass fibre cable of which the joint end is installed within the wall of a transport channel, one branch of the cable fork being coupled to the light transmitter and the other branch being coupled to the light receiver, and the output of said light receiver being connected to a discriminator circuit comprising a convertor for converting the effective ac voltage component in said received signal into a dc voltage component and a comparator in which said dc voltage signal is compared with a predetermined threshold signal.
Claim 2
Dependent Claim
116 words
System for detecting the forming of depot inside a transport channel for transporting particles in a light transparent carrier fluid, comprising a light transmitter, a light receiver, a bifurcated glass fibre cable of which the joint end is installed within the wall of a transport channel, one branch of the cable fork being coupled to the light transmitter and the other branch being coupled to the light receiver, and the output of said light receiver being connected to a discriminator circuit comprising a convertor for converting the effective ac voltage component in said received signal into a dc voltage component and a comparator in which said dc voltage signal is compared with a predetermined threshold signal.
Claim 3
Dependent Claim
20 words
System according to claim 1, in which the output of the discriminator circuit is coupled to a visual indicator unit.
Claim 4
Dependent Claim
41 words
System according to claim 1, in which the output of the discriminator circuit is connected to a transmitter for transmitting the output signal of the discriminator circuit to a corresponding receiver of which the output is coupled to said indicator unit.
Claim 5
Dependent Claim
29 words
System according to claims 1, in which the discriminator circuit comprises an input on which a signal can be supplied in case the fluid does not contain any particles.
Claim 6
Dependent Claim
40 words
System according to claim 1, in which the conduit section of the transport channel in which said joint end of the bifurcated glass fibre cable is installed has a somewhat larger diameter than the remaining sections of the transport channel.
Claim 7
Dependent Claim
44 words
System according to claim 1, in which the joint end of the glass fibre cable is positioned within the lower part of the transport channel defined by an angle of ±30° with reference to the vertical direction through the center point of the channel.
Claim 8
Dependent Claim
66 words
Measuring system for detecting and measuring the forming of depot inside a transport channel for transporting particles in a carrier fluid, comprising a number of systems as described in claim 1, in which the joint ends of the respective bifurcated glass fibre cables are installed within the channel wall at respective different angles with reference to the vertical direction through the center point of the channel.
Claim 9
Dependent Claim
26 words
Measuring system according to claim 7, in which three of the above described systems are used and the applied angles are respectively 30°, 60° and 90°.
Claim 10
Dependent Claim
39 words
Measuring system according to claim 7, in which ahead of the convertor a filter is inserted in the circuit for transmitting only a predetermined frequency range and the indicator unit comprises means for indicating signals within predetermined amplitude ranges.
References Cited (Backward Citations)
NL6608492A
Cited
US3653767A
Cited
CH479478A
Cited
US3575129A
Cited
DE1964388A1
Cited
GB1274534A
Cited
GB1376304A
Cited
DE2401322A1
Cited
US4146799A
Cited
US4155651A
Cited
BE869999A
Cited
GB2097529A
Cited
DE3117866A1
Cited
US4498004A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1988-12-23 | 1989-06-24 | 1989-12-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-12-23 | 1993-06-24 | 1993-12-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-12-23 | 1997-06-24 | 1997-12-24 | $7700.00 | Window Closed / Lapsed |