US3842422A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and apparatus for recording signals
Assignee: TRANSIDYNE GEN CORP
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Filing: 1973-10-12
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Granted: 1974-10-15
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Expires: 1993-10-12
Abstract
Abstract A system for recording the output of a density scan in a manner which simplifies the computation of the integrals of various fractions of the scan employs a photodetector for scanning the sample in a forward direction and then in the reverse direction. During the forward scan the output of the densitometer is recorded on a chart recorder and is simultaneously applied to an integrator. At the end of the forward scan the integrated signal is stored and applied as an input to adjust the gain of a variable gain circuit. Both the sample scan direction and the recorder direction are then reversed and the time varying output of the integrator is applied to the variable gain circuit and the output of that circuit is recorded producing a second integral trace bearing a one-to-one relationship along vertical lines with the previous density trace. This recorded integral scan is thus normalized as a function of the value of the total integral of the signal so that the integral of any segment of the first trace may be readily determined by observing the change in value of the second trace in the span of that segment.
Inventors
- 👤 J Vandenbroek
- 👤 W Wilfong
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 09:30
CPC Classifications
G; G01; G01D; G01D9/00; G01D9/38; G01S; G01S7/00; G01S7/52; G01S7/56; G01S7/60
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
109 words
The method of graphically recording a time varying signal comprising: providing said signal to a graphic output device and generating a trace of said time varying signal on said device; providing said time varying signal to an integrator to generate a value proportional to the time integral of said time varying signal; adjusting the gain of a variable gain circuit as a function of the output of said integrator; providing said time varying signal to the integrator and providing the output of the integrator to the variable gain circuit; and recording the output of the variable gain circuit in positional relationship with the trace of said time varying signal.
Claim 2
Independent Claim
109 words
The method of graphically recording a time varying signal comprising: providing said signal to a graphic output device and generating a trace of said time varying signal on said device; providing said time varying signal to an integrator to generate a value proportional to the time integral of said time varying signal; adjusting the gain of a variable gain circuit as a function of the output of said integrator; providing said time varying signal to the integrator and providing the output of the integrator to the variable gain circuit; and recording the output of the variable gain circuit in positional relationship with the trace of said time varying signal.
Claim 3
Dependent Claim
45 words
The method of claim 1 wherein said time varying signal is simultaneously provided to said integrator to generate a value proportional to the time integral of said time varying signal and to the graphic output devicE to generate a trace of said time varying signal.
Claim 4
Dependent Claim
54 words
The method of claim 1 wherein said time varying signal is generated by a scanning device, two scans are made by the scanning device, and the output of said scanning device during the first scan is provided to said integrator to generate a value proportional to the time integral of said time varying signal.
Claim 5
Independent Claim
111 words
A system for generating a graphic record of an electrical signal having a time varying characteristic, comprising: means for receiving the signal and generating a signal proportional to the time integral of said characteristic; graphic recording means connected to receive and record the time varying signal; a variable gain circuit; means for adjusting the gain of said circuit to a level controlled by the output of the integrator at the completion of reception of said time varying signal and means for providing said time varying signal to the integrator and simultaneously providing the output of the integrator to said variable gain circuit, and recording the output of the variable gain circuit.
Claim 6
Independent Claim
111 words
A system for generating a graphic record of an electrical signal having a time varying characteristic, comprising: means for receiving the signal and generating a signal proportional to the time integral of said characteristic; graphic recording means connected to receive and record the time varying signal; a variable gain circuit; means for adjusting the gain of said circuit to a level controlled by the output of the integrator at the completion of reception of said time varying signal and means for providing said time varying signal to the integrator and simultaneously providing the output of the integrator to said variable gain circuit, and recording the output of the variable gain circuit.
Claim 7
Dependent Claim
123 words
The system of claim 4 wherein said means for adjusting the gain of said circuit to a level controlled by the output of the integrator at the completion of reception of said time varying signal by the integrator includes a capacitor and switch means for connecting the capacitor to the output of the integrator at the completion of reception of said time varying signal by the integrator so that the capacitor assumes a charge proportional to the total integral signal, and circuit means connecting the capacitor to the variable gain circuit so that the gain of the circuit is adjusted to a level proportional to the output of the integrator at the completion of reception of said time varying signal by the integrator.
Claim 8
Dependent Claim
45 words
The system of claim 4 wherein said electrical signal having a time varying characteristic is generated by scanning a test member and the system includes means for scanning the test member twice and for recording the time integral of the characteristic during the first scan.
Claim 9
Dependent Claim
24 words
The system of claim 6 wherein said graphic recording means is connected to receive and record the time varying signal during the first scan.
Claim 10
Dependent Claim
24 words
The system of claim 6 wherein said graphic recording means is connected to receive and record the time varying signal during the second scan.
Claim 11
Dependent Claim
25 words
The system of claim 4 wherein the variable gain circuit constitutes a portion of a pen drive servomechanism system associated with said graphic recording means.
Claim 12
Independent Claim
167 words
A system for recording a signal having a time varying characteristic in such a manner as to simplify the computation of the integral of any interval of the signal relative to the total integral of the signal comprising: a graphic recorder; an integrator; a variable gain circuit; means for generating said time varying signal; circuit means for applying said signal to said graphic recorder to generate a trace of said time varying characteristic; circuit means for applying said signal to said integrator; means for storing the output of the integral at the end of its reception of said time varying signal; means for adjusting the gain of said variable gain circuit as a function of the output of said storage means; and means for providing said time varying signal to said integrator and the output of the integrator to the variable gain circuit and recording the output of the variable gain circuit on said recording means in positional alignment to the record of the time varying signal.
Claim 13
Independent Claim
167 words
A system for recording a signal having a time varying characteristic in such a manner as to simplify the computation of the integral of any interval of the signal relative to the total integral of the signal comprising: a graphic recorder; an integrator; a variable gain circuit; means for generating said time varying signal; circuit means for applying said signal to said graphic recorder to generate a trace of said time varying characteristic; circuit means for applying said signal to said integrator; means for storing the output of the integral at the end of its reception of said time varying signal; means for adjusting the gain of said variable gain circuit as a function of the output of said storage means; and means for providing said time varying signal to said integrator and the output of the integrator to the variable gain circuit and recording the output of the variable gain circuit on said recording means in positional alignment to the record of the time varying signal.
Claim 14
Dependent Claim
68 words
The system of claim 10 wherein said means for generating said time varying signal consists of a scanner for a sample and such system includes switching means for connecting the means for storing the output of the integral to the integrator during a first scan of the sample and for connecting the output of the integrator to the variable gain circuit during a second scan of the sample.
Claim 15
Dependent Claim
29 words
The system of claim 10 wherein said means for storing the output of the integral at the end of its receptiOn of said time varying signal constitutes a capacitor.
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) | 1977-10-14 | 1978-04-15 | 1978-10-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-10-14 | 1982-04-15 | 1982-10-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-10-14 | 1986-04-15 | 1986-10-15 | $7700.00 | Window Closed / Lapsed |