US4267620A
Expired / Lapsed
US
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Method and apparatus for controlling textile working systems employing NMR detector
Assignee: SPECIAL INSTRUMENTS LABS Inc
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Filing: 1978-08-17
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Granted: 1981-05-19
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Expires: 1998-08-17
Abstract
Abstract The present disclosure relates to a method and apparatus for controlling textile working systems such as drafting frames. A detector is provided for detecting variations in the numbers of specific types of atoms, such as hydrogen atoms, in a known length of a traveling fibrous strand being worked by the drafting frame or other textile working device. System parameters, such as the draft imparted to the strand, may be varied in response to the detected variations.
Inventors
- 👤 John D. Allen, Jr.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 07:41
CPC Classifications
G; G01; G01N; G01N24/00; G01N24/08; G01N24/085; D; D01; D01H; D01H5/00; D01H5/18; D01H5/32; D01H5/38
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
122 words
An apparatus for controlling a fiber drafting system, comprising: detector means for producing a signal related in value to variations in the mass per unit length of the fibrous material in a unit length of the drafted sliver including: means for providing a magnetic field impinging on the drafted sliver; and, means for inducing nuclear magnetic resonance in a predetermined length of the drafted sliver within the field and for producing a signal related in value to the energy absorbed by the length of the sliver at resonance; and, means for varying the draft imparted to the sliver responsive to variations in the signal produced by the detector means, to vary the mass of fibrous material per unit length of the sliver.
Claim 2
Independent Claim
122 words
An apparatus for controlling a fiber drafting system, comprising: detector means for producing a signal related in value to variations in the mass per unit length of the fibrous material in a unit length of the drafted sliver including: means for providing a magnetic field impinging on the drafted sliver; and, means for inducing nuclear magnetic resonance in a predetermined length of the drafted sliver within the field and for producing a signal related in value to the energy absorbed by the length of the sliver at resonance; and, means for varying the draft imparted to the sliver responsive to variations in the signal produced by the detector means, to vary the mass of fibrous material per unit length of the sliver.
Claim 3
Independent Claim
87 words
A method of controlling a textile working system comprising the steps of: producing a signal related in value to the number of a specific type of atom bonded to fibrous material in a known length of a traveling fibrous body being worked in the system by detecting the amount of energy absorbed by the length of the fibrous body at nuclear magnetic resonance; and varying an operating parameter of the textile working system responsive to variations in said signal to vary the fibrous mass per unit length.
Claim 4
Independent Claim
87 words
A method of controlling a textile working system comprising the steps of: producing a signal related in value to the number of a specific type of atom bonded to fibrous material in a known length of a traveling fibrous body being worked in the system by detecting the amount of energy absorbed by the length of the fibrous body at nuclear magnetic resonance; and varying an operating parameter of the textile working system responsive to variations in said signal to vary the fibrous mass per unit length.
Claim 5
Dependent Claim
120 words
In a textile working system producing a traveling elongated fibrous body having a fibrous mass per unit length, an improvement for controlling said mass per unit length comprising the steps of: disposing a portion of the traveling elongated fibrous body in magnetic field; inducing nuclear magnetic resonance in the hydrogen nuclei in a length of the fibrous body within the field; producing a signal related in value to the energy absorbed by the length of the fibrous body at resonance; and, varying an operating parameter of the textile working system responsive to the signal related in value to the energy absorbed by the length of the fibrous body to vary the fibrous mass per unit length of the fibrous body.
Claim 6
Dependent Claim
120 words
In a textile working system producing a traveling elongated fibrous body having a fibrous mass per unit length, an improvement for controlling said mass per unit length comprising the steps of: disposing a portion of the traveling elongated fibrous body in magnetic field; inducing nuclear magnetic resonance in the hydrogen nuclei in a length of the fibrous body within the field; producing a signal related in value to the energy absorbed by the length of the fibrous body at resonance; and, varying an operating parameter of the textile working system responsive to the signal related in value to the energy absorbed by the length of the fibrous body to vary the fibrous mass per unit length of the fibrous body.
Claim 7
Independent Claim
161 words
An apparatus for detecting variations in the mass per unit length of a traveling fibrous strand, comprising: means for providing a substantially uniform magnetic field generally perpendicular to the direction of travel of a portion of the fibrous strand; sweep coil means for providing a first periodically varying magnetic field generally parallel to the uniform magnetic field; means, including a coil disposed in surrounding relationship to a predetermined length of the portion of the fibrous strand, for providing a second, periodically varying magnetic field perpendicular to the substantially uniform magnetic field to induce nuclear magnetic resonance in the length of the fibrous strand said means also including an oscillator for providing a generally constant amplitude signal to the surrounding coil at the resonance frequency of hydrogen nuclei bound in the length of the fibrous strand; and, means for producing a signal related in value to the energy absorbed from the surrounding coil by the length of the fibrous strand at resonance.
Claim 8
Independent Claim
161 words
An apparatus for detecting variations in the mass per unit length of a traveling fibrous strand, comprising: means for providing a substantially uniform magnetic field generally perpendicular to the direction of travel of a portion of the fibrous strand; sweep coil means for providing a first periodically varying magnetic field generally parallel to the uniform magnetic field; means, including a coil disposed in surrounding relationship to a predetermined length of the portion of the fibrous strand, for providing a second, periodically varying magnetic field perpendicular to the substantially uniform magnetic field to induce nuclear magnetic resonance in the length of the fibrous strand said means also including an oscillator for providing a generally constant amplitude signal to the surrounding coil at the resonance frequency of hydrogen nuclei bound in the length of the fibrous strand; and, means for producing a signal related in value to the energy absorbed from the surrounding coil by the length of the fibrous strand at resonance.
Claim 9
Dependent Claim
25 words
The apparatus of claim 4 further comprising means for suppressing detection of energy absorption caused by hydrogen bonded in water carried by the fibrous strand.
Claim 10
Dependent Claim
20 words
The apparatus of claim 4 wherein the constant amplitude is selected to inhibit saturation of the hydrogen nuclei at resonance.
Claim 11
Dependent Claim
32 words
The apparatus of claim 4 wherein the signal related in value to the energy absorbed from the surrounding coil is phase coherently detected with respect to the first periodically varying magnetic field.
Claim 12
Dependent Claim
22 words
The apparatus of claim 4 further comprising non-magnetic means for containing the traveling fibrous strand as it moves through the surrounding coil.
Claim 13
Dependent Claim
47 words
The apparatus of claim 8 wherein the containing means comprises a non-magnetic glass or ceramic tube with a mouth portion for receiving the traveling fibrous strand and a body portion, with a relatively smaller internal diameter than the mouth portion, around which the surrounding coil is wrapped.
Claim 14
Independent Claim
76 words
An apparatus for controlling a textile working system, comprising: means for producing a signal related in value to the number of a specific type of atom in a known length of a traveling fibrous body being worked in the system by detecting the amount of energy absorbed by the length of the fibrous body at nuclear magnetic resonance; and means for varying an operating parameter of the textile working system responsive to variations in said signal.
Claim 15
Independent Claim
76 words
An apparatus for controlling a textile working system, comprising: means for producing a signal related in value to the number of a specific type of atom in a known length of a traveling fibrous body being worked in the system by detecting the amount of energy absorbed by the length of the fibrous body at nuclear magnetic resonance; and means for varying an operating parameter of the textile working system responsive to variations in said signal.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1984-05-18 | 1984-11-17 | 1985-05-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-05-18 | 1988-11-17 | 1989-05-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-05-18 | 1992-11-17 | 1993-05-19 | $7700.00 | Window Closed / Lapsed |