Patent US3628563A successfully refreshed from Google Patents.
US3628563A
Expired / Lapsed
US
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Explosion detecting means for a fluid pipeline
Assignee: Toshiba Corp
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Filing: 1969-12-01
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Granted: 1971-12-21
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Expires: 1989-12-01
Abstract
Abstract A device for detecting an increase in water flow through a water service main and for detecting the pressure drop existing in the water flowing through the main is disclosed. The device operates when the volume of the existing water flow in the main exceeds by a predetermined value a volume of water flow previously stored in a first memory device during a predetermined sampling period. The apparatus for detecting the pressure drop of the water in the water service main operates when the amplitude of the existing water pressure falls below the water pressure previously stored in a second memory device. The supply of water into the water service main is stopped by the simultaneous operation of both these detecting devices.
Inventors
- 👤 Takehiko Tomita
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 05:47
CPC Classifications
G; G01; G01M; G01M3/00; G01M3/02; G01M3/26; G01M3/28; G01M3/2807; F; F16; F16L; F16L2101/00; F16L2101/30; Y; Y10; Y10T; Y10T137/00; Y10T137/7722; Y10T137/7723; Y10T137/7726; Y10T137/7727; Y10T137/7758; Y10T137/7761; Y10T137/8593; Y10T137/85978; Y10T137/85986; Y10T137/86027
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
144 words
A system for detecting ruptures in a pipeline comprising: fluid flow responsive means coupled to said pipeline for generating signals proportional to the rate of fluid flow in said pipeline, first logic means coupled to said fluid flow responsive means for generating an output signal only if fluid flow in said pipeline is increasing at a rate greater than a predetermined rate, fluid pressure responsive means coupled to said pipeline for generating signals proportional to fluid pressure within said pipeline, second logic means coupled to said fluid pressure responsive means for generating an output signal only if pressure in said pipeline is decreasing at a rate greater than a predetermined rate; and, control means coupled to said first and second logic means for generating a control signal in response to the simultaneous presence of output signals from both said first and second logic means.
Claim 2
Independent Claim
144 words
A system for detecting ruptures in a pipeline comprising: fluid flow responsive means coupled to said pipeline for generating signals proportional to the rate of fluid flow in said pipeline, first logic means coupled to said fluid flow responsive means for generating an output signal only if fluid flow in said pipeline is increasing at a rate greater than a predetermined rate, fluid pressure responsive means coupled to said pipeline for generating signals proportional to fluid pressure within said pipeline, second logic means coupled to said fluid pressure responsive means for generating an output signal only if pressure in said pipeline is decreasing at a rate greater than a predetermined rate; and, control means coupled to said first and second logic means for generating a control signal in response to the simultaneous presence of output signals from both said first and second logic means.
Claim 3
Dependent Claim
41 words
A system for detecting ruptures in a pipeline as in claim 1, further comprising: means coupled to said control means and to said pipeline for cutting off fluid flow in said pipeline in response to the generation of said control signal.
Claim 4
Dependent Claim
26 words
A system for detecting ruptures in a pipeline as in claim 1, wherein: said control means comprises an AND gate including two series connected switching means.
Claim 5
Dependent Claim
35 words
A system for detecting ruptures in a pipeline as in claim 1, further comprising: alarm means coupled to said control means for producing an alarm signal in response to the generation of said control signal.
Claim 6
Dependent Claim
67 words
A system for detecting ruptures in a pipeline as in claim 1, wherein: said first logic means comprises memory means coupled to said fluid flow responsive means for storing an output signal thereof for a predetermined interval; and, comparator means coupled to said memory means and to said fluid flow responsive means for comparing said stored signal with another output signal from said fluid flow responsive means.
Claim 7
Dependent Claim
67 words
A system for detecting ruptures in a pipeline as in claim 5, wherein: said second logic means comprises memory means coupled to said fluid pressure responsive means for storing an output signal thereof for a predetermined interval; and, comparator means coupled to said memory means and to said fluid pressure responsive means for comparing said stored signal with another output signal from said fluid pressure responsive means.
Claim 8
Dependent Claim
63 words
A system for detecting ruptures in a pipeline as in claim 5, wherein: said first memory means includes a memory circuit; and, sampling means coupled to said memory circuit and to said fluid flow responsive means for clearing and reloading said memory circuit and for transferring said stored signal from said first memory means to said comparator means at a predetermined time interval.
Claim 9
Dependent Claim
63 words
A system for detecting ruptures in a pipeline as in claim 5, wherein: said second memory means includes a memory circuit; and, sampling means coupled to said memory circuit and to said fluid pressure responsive means for clearing and reloading said memory circuit and for transferring said stored signal from said second memory means to said comparator means at a predetermined time interval.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-12-20 | 1975-06-21 | 1975-12-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-12-20 | 1979-06-21 | 1979-12-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-12-20 | 1983-06-21 | 1983-12-21 | $7700.00 | Window Closed / Lapsed |