← Back to Patent Explorer
US3886439A Expired / Lapsed US ⏱️ 0.0 years remaining

Method of separating broad and narrow lines of a frequency spectrum

Assignee: Individual
•
Filing: 1973-08-20
•
Granted: 1975-05-27
•
Expires: 1993-08-20
📄 Original PDF 🌐 Google Patents 🔄 Sync Now

Abstract

Abstract In spin resonance spectrometry, broad and narrow lines can occur simultaneously in the same frequency range. The present invention serves the purpose of separating these lines and achieves such separation by selecting the recording time, with simultaneous excitation and recording of the oscillations of the spectrum in the form of an interferogram, in such a way as to make it start either immediately after excitation of the oscillations and make it very short or delay its beginning for a certain period of time relative to the excitation of the oscillations and then make it relatively long. In the former case, it is mainly the broad lines which are recorded, while the narrow lines are excluded because the recording time is over before the amplitude of narrow lines has reached any significant value. By contrast, the delay in the beginning of the recording time results in the exclusion of the broad lines, because these lines decay very rapidly and thus have more or less disappeared by the time the recording period starts, whilst the narrow lines, which decay very slowly, are more or less recorded without any reduction.

Inventors

  • 👤 Gunther Rudi Laukien

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-10-25 20:47
CPC Classifications
G; G01; G01R; G01R33/00; G01R33/20; G01R33/44; G01R33/46

Claims Analysis

Total Claims: 9
Claim 1
Independent Claim 99 words
A method of separating broad and narrow lines of a frequency spectrum in the same frequency range in spin resonance spectrometry, comprising the steps of: exciting all of the oscillations of the spectrum at the same time in a given substance; selectively recording those oscillations corresponding to only one of said broad and narrow lines in the form of an interference signal by recording the oscillations produced in said substance during only a selected portion of the time interval during which said all of the oscillations of the spectrum are produced; and subjecting said interference signal to Fourier analysis.
Claim 2
Independent Claim 99 words
A method of separating broad and narrow lines of a frequency spectrum in the same frequency range in spin resonance spectrometry, comprising the steps of: exciting all of the oscillations of the spectrum at the same time in a given substance; selectively recording those oscillations corresponding to only one of said broad and narrow lines in the form of an interference signal by recording the oscillations produced in said substance during only a selected portion of the time interval during which said all of the oscillations of the spectrum are produced; and subjecting said interference signal to Fourier analysis.
Claim 3
Dependent Claim 67 words
The method according to claim 1, wherein said step of selectively recording comprises the step of recording the oscillations produced in said substance in the form of an interference signal for only the portion of said time interval commensing immediately after excitation of said oscillations and which portion is sufficiently short to exclude the narrow lines, whereby said broad lines of the frequency spectrum are selectively recorded.
Claim 4
Dependent Claim 76 words
The method according to claim 1, wherein said step of selectively recording comprises the step of recording the oscillations produced in said substance in the form of an interference signal for only the portion of said time interval commensing a sufficient time after excitation of said oscillations that most of the oscillations assigned to the broad lines have decayed by the time the recording begins, whereby said narrow lines of the frequency spectrum are selectively recorded.
Claim 5
Dependent Claim 41 words
The method according to claim 1, further including the steps of registering the instantaneous amplitudes of said interference signal during selected time periods, and determining the frequencies and amplititudes of the oscillations forming the interference signal from said registered instantaneous amplitudes.
Claim 6
Dependent Claim 33 words
The method according to claim 4 further including the step of varying the lengths of the periods of time between the times at which the instantaneous amplitude of the interference signal is registered.
Claim 7
Dependent Claim 24 words
The method according to claim 4, further including the step of transforming said interference signal into a suitable frequency range prior to registration thereof.
Claim 8
Dependent Claim 28 words
The method according to claim 6, further including the step of limiting the range of frequencies of the interference signal by means of filters prior to registration thereof.
Claim 9
Dependent Claim 28 words
The method according to claim 7, further including the step of limiting the range of frequencies of the interference signal by means of filters subsequent to transformation thereof.

References Cited (Backward Citations)

US3475680A Cited
US3461381A Cited
US3609317A Cited

USPTO Annuity & Maintenance Windows

Annuity Stage Window Opens Payment Deadline Surcharge Period Until Estimated Fee Status
3.5 Years (Year 4) 1978-05-26 1978-11-25 1979-05-27 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1982-05-26 1982-11-25 1983-05-27 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 1986-05-26 1986-11-25 1987-05-27 $7700.00 Window Closed / Lapsed

Assigned Categories & Tags

No categories assigned to this patent yet.

Assign Category Tag