US3739159A
Expired / Lapsed
US
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Gas flow calculation system
Assignee: Hydril LLC
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Filing: 1971-12-27
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Granted: 1973-06-12
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Expires: 1991-12-27
Abstract
Abstract Gas flow calculation equipment to compute the quantity Delta P . P/T in digital form includes: A. AN ADC processing unit operable to receive analog signals P , Delta P and T and to provide digital outputs Delta P/T and P, b. a first shift register connected to receive said digital output Delta P/T and into which said digitized Delta P/T is shiftable, C. A SECOND SHIFT REGISTER CONNECTED TO RECEIVE SAID DIGITAL OUTPUT P and into which digitized P is shiftable, D. MULTIPLIER MEANS CONNECTED TO RECEIVE AND MULTIPLY THE CONTENTS OF SAID SHIFT REGISTERS, THEREBY PRODUCING A CORRESPONDING DIGITAL PRODUCT, AND E. A THIRD SHIFT REGISTER CONNECTED TO RECEIVE THE DIGITAL PRODUCT OF THE MULTIPLIER MEANS. Additional circuitry is operable to derive, from the contents of the third register, the square root of the quantity Delta P . P/T.
Inventors
- 👤 R Nalley
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 18:02
CPC Classifications
G; G06; G06F; G06F7/00; G06F7/38; G06F7/48; G06F7/544; G01; G01F; G01F1/00; G01F1/05; G01F1/34; G01F1/36; G01F1/363; G01F15/00; G01F15/02; G01F15/04; G01F15/043; G01F15/046
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
121 words
In gas flow calculation equipment to compute the quantity Delta P . P/T) ((P . P/T) 1/2), the combination comprising a. an ADC processing unit operable to receive analog signals P, Delta P and T and to provide digital outputs Delta P/T and P, b. a first shift register connected to receive said digital output Delta P/T and into which said digitized Delta P/T is shiftable, c. a second shift register connected to receive said digital output P and into which digitized p is shiftable, d. multiplier means connected to receive and multiply the contents of said shift registers, thereby producing a corresponding digital product, and e. a third shift register connected to receive the digital product of the multiplier means.
Claim 2
Dependent Claim
121 words
In gas flow calculation equipment to compute the quantity Delta P . P/T) ((P . P/T) 1/2), the combination comprising a. an ADC processing unit operable to receive analog signals P, Delta P and T and to provide digital outputs Delta P/T and P, b. a first shift register connected to receive said digital output Delta P/T and into which said digitized Delta P/T is shiftable, c. a second shift register connected to receive said digital output P and into which digitized p is shiftable, d. multiplier means connected to receive and multiply the contents of said shift registers, thereby producing a corresponding digital product, and e. a third shift register connected to receive the digital product of the multiplier means.
Claim 3
Dependent Claim
26 words
The combination of claim 1 including logic means connected to receive the contents of the third shift register and to compute therefrom a square root output.
Claim 4
Dependent Claim
36 words
The combination of claim 2 including circuitry to supply the square root output of the logic means to one of the first and second shift registers, for temporary storage, said square root output representing gas flow.
Claim 5
Dependent Claim
53 words
The combination of claim 3 including an accumulator register connected via a data bus with said one of the first and second shift registers for transmission to the accumulator of data representive of the sum of the previously stored contents of the accumulator and said square root output stored in said one register.
Claim 6
Dependent Claim
54 words
The combination of claim 2 including control means connected with said first and second registers to effect setting of the first register to receive said digital output Delta P/T, during a first time interval, and to effect setting of the second shift register to receive said digital output P during a second time interval.
Claim 7
Dependent Claim
39 words
The combination of claim 5 wherein said control means is connected with the third shift register to effect setting thereof to receive the product of the multiplied contents of the first and second registers, during a third time interval.
Claim 8
Dependent Claim
40 words
The combination of claim 6 wherein said control means is connected with said logic means to effect setting thereof to receive the product contents of the third register and to compute said square root output, during a fourth time interval.
Claim 9
Dependent Claim
77 words
The combination of claim 7 including circuitry to supply the square root output of the logic means to one of the first and second shift registers, for temporary storage, said square root output representing gas flow, said one register being cleared by said control means after said third register receives the multiplied contents of the first and second register, said control means effecting supply of said square root output to said one register after said clearing thereof.
Claim 10
Dependent Claim
64 words
The combination of claim 8 including an accumulator register connected via a data bus with said one of the first and second registers for transmission to the accumulator, during a fourth time interval under the influence of said control means, of data representative of the sum of the previously stored contents of the accumulator and said square root output stored in said one register.
Claim 11
Dependent Claim
139 words
In gas flow calculation equipment operable to compute the quantity Delta P . P/T), the combination comprising a. an analog to digital processor, b. multiplexer means to selectively route analog signals representing Delta P, P and T to the processor during at least two different time intervals for conversion by the processor into one digital output representative of the quotient of one of the Delta P and P signals and said T signal, and into another digital output representative of the other of said Delta P and P signals, c. shift register means in which said digital outputs are stored, said register means connected with said processor, and d. multiplier circuitry connected with said register means to receive and multiply the digital outputs stored in said register means, and thereby produce digital product values ( Delta P . P/T).
Claim 12
Dependent Claim
139 words
In gas flow calculation equipment operable to compute the quantity Delta P . P/T), the combination comprising a. an analog to digital processor, b. multiplexer means to selectively route analog signals representing Delta P, P and T to the processor during at least two different time intervals for conversion by the processor into one digital output representative of the quotient of one of the Delta P and P signals and said T signal, and into another digital output representative of the other of said Delta P and P signals, c. shift register means in which said digital outputs are stored, said register means connected with said processor, and d. multiplier circuitry connected with said register means to receive and multiply the digital outputs stored in said register means, and thereby produce digital product values ( Delta P . P/T).
Claim 13
Dependent Claim
29 words
The combination of claim 10 including other circuitry connected with said multiplier circuitry to receive said digital produce values and to compute values for ( Delta P . P/T)1/2.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-06-11 | 1976-12-11 | 1977-06-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-06-11 | 1980-12-11 | 1981-06-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-06-11 | 1984-12-11 | 1985-06-12 | $7700.00 | Window Closed / Lapsed |