US4441102A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Flow sensing apparatus
Assignee: BASIC AMERICAN INDUSTRIES Inc
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Filing: 1981-01-02
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Granted: 1984-04-03
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Expires: 2001-01-02
Abstract
Abstract A flow sensing apparatus for providing an indication of the presence of an exiting flow stream from a coal processing plant cyclone includes a probe member disposed in the edge of the flow stream, an electronic sensing circuit cooperatively arranged with the probe member in order to provide either a high or a low level signal, depending upon whether the probe member is being contacted by the exiting flow stream or whether such contact is not being made. A display light is cooperatively arranged with the sensing circuit so as to flicker on and off as the exiting flow stream intermittently and irregularly contacts the probe member. The flickering of the display light indicating proper outlet flow from the coal processing plant cyclone while a constantly on condition of the light indicates that flow is not occurring. A time-delay circuit section is included so that if flow is blocked for a predetermined interval of time, an alarm sounds telling the operator that flow has been blocked and that corrective measures should be taken.
Inventors
- 👤 Charles E. Webb
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 15:02
CPC Classifications
G; G08; G08B; G08B21/00; G08B21/18; G08B21/187; B; B04; B04C; B04C11/00; G01; G01P; G01P13/00; G01P13/0006
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
156 words
A flow sensing apparatus for providing an indication of the presence of an irregularly flowing stream from an outlet, said flow sensing apparatus comprising: an electrical contact probe member disposed in said stream; a sensing circuit cooperatively arranged with said probe member and adapted to rapidly provide a sequence of two different signals, a first signal being generated by said sensing circuit when the stream makes contact with said probe member, and a second signal being generated by said sensing circuit when said stream does not make contact with said probe member; and a display light cooperatively arranged with said sensing circuit for indicating the presence of said irregularly flowing stream, said display light switching on in response to one of said first or second signals, and said display light switching off in response to the other of said signals so as to produce a flickering light indicating the dynamic conditions of said irregularly flowing stream.
Claim 2
Dependent Claim
156 words
A flow sensing apparatus for providing an indication of the presence of an irregularly flowing stream from an outlet, said flow sensing apparatus comprising: an electrical contact probe member disposed in said stream; a sensing circuit cooperatively arranged with said probe member and adapted to rapidly provide a sequence of two different signals, a first signal being generated by said sensing circuit when the stream makes contact with said probe member, and a second signal being generated by said sensing circuit when said stream does not make contact with said probe member; and a display light cooperatively arranged with said sensing circuit for indicating the presence of said irregularly flowing stream, said display light switching on in response to one of said first or second signals, and said display light switching off in response to the other of said signals so as to produce a flickering light indicating the dynamic conditions of said irregularly flowing stream.
Claim 3
Dependent Claim
18 words
The flow sensing apparatus of claim 1 wherein said electrical contact probe member is a carbide drill bit.
Claim 4
Dependent Claim
24 words
The flow sensing apparatus of claim 1 wherein said first signal is a low potential, in response to which said display lamp switches off.
Claim 5
Dependent Claim
24 words
The flow sensing apparatus of claim 1 wherein said second signal is a high potential, in response to which said display lamp switches on.
Claim 6
Dependent Claim
30 words
The flow sensing apparatus of claim 1 wherein said sensing circuit comprises: (a) a display light circuit section; (b) an alarm circuit section; and (c) a power supply circuit section.
Claim 7
Dependent Claim
39 words
The flow sensing apparatus of claim 5 wherein said alarm circuit section includes time-delayed charging means suitably arranged for generating an alarm signal in response to the presence of a continuous second signal for a predetermined interval of time.
Claim 8
Dependent Claim
21 words
The flow sensing apparatus of claim 6 which further includes an instant-off, time-delay on circuit section for terminating said alarm signal.
Claim 9
Dependent Claim
57 words
The flow sensing apparatus of claim 5 which further includes a plurality of display lights and a corresponding plurality of display light circuit sections, each of said display light circuit sections corresponding to a different probe member and a different stream, said display lights providing a simultaneous indication of the dynamic flow conditions of each different stream.
Claim 10
Dependent Claim
26 words
The flow sensing apparatus of claim 8 wherein each display light circuit section includes adjustment means for varying the electrical sensitivity of its corresponding probe member.
References Cited (Backward Citations)
US2659881A
Cited
US2798215A
Cited
US2967297A
Cited
US3284788A
Cited
US3445834A
Cited
US3493951A
Cited
US3557616A
Cited
US3686926A
Cited
US3849723A
Cited
US3735201A
Cited
US3878103A
Cited
US4103292A
Cited
US4193356A
Cited
US4246576A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1987-04-03 | 1987-10-03 | 1988-04-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-04-03 | 1991-10-03 | 1992-04-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-04-03 | 1995-10-03 | 1996-04-03 | $7700.00 | Window Closed / Lapsed |