US3750461A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of and an apparatus for determining the cross-section of products of the textile industry, especially that of yarns, rovings and slivers
Assignee: Zellweger Uster AG
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Filing: 1971-06-16
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Granted: 1973-08-07
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Expires: 1991-06-16
Abstract
Abstract Method and apparatus for determining the cross-section of textile products including means for generating a sound field at least partially within a resonator and means for measuring the phase disturbance in said sound field created by the passage of a textile product therethrough.
Inventors
- 👤 E Felix
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 20:58
CPC Classifications
G; G01; G01N; G01N29/00; G01N29/04; G01N29/07; G01N29/075; G01B; G01B17/00; G01N33/00; G01N33/36; G01N33/365
Claims Analysis
Total Claims: 24
Claim 1
Independent Claim
83 words
A method of determining the cross-section of products of the textile industry, especially yarns, rovings and slivers, comprising generating a sound field within a main resonator tuned approximately to the working frequency or one of its harmonics of the sound to thereby create a standing wave therein, passing the textile product through the sound field at a predetermined location, and measuring the disturbance in the resonance conditions in said main resonator produced by the introduction of the textile product into the sound field.
Claim 2
Independent Claim
83 words
A method of determining the cross-section of products of the textile industry, especially yarns, rovings and slivers, comprising generating a sound field within a main resonator tuned approximately to the working frequency or one of its harmonics of the sound to thereby create a standing wave therein, passing the textile product through the sound field at a predetermined location, and measuring the disturbance in the resonance conditions in said main resonator produced by the introduction of the textile product into the sound field.
Claim 3
Dependent Claim
31 words
A method as defined in claim 1 wherein the textile product is guided at least approximately in the vicinity of the maximum velocity of the standing wave generated in said resonator.
Claim 4
Dependent Claim
31 words
A method as defined in claim 1 wherein the textile product is guided at least approximately in the vicinity of the minimum pressure of the standing wave generated in said resonator.
Claim 5
Dependent Claim
31 words
A method as defined in claim 1 wherein the textile product is guided at least approximately in the vicinity of the minimum velocity of the standing wave generated in said resonator.
Claim 6
Dependent Claim
31 words
A method as defined in claim 1 wherein the textile product is guided at least approximately in the vicinity of the maximum pressure of the standing wave generated in said resonator.
Claim 7
Dependent Claim
41 words
A method as defined in claim 1 wherein said sound field is generated by a sound generator and measured by a sound pickup spaced by a distance which corresponds at least approximately to half the wave length of the working frequency.
Claim 8
Dependent Claim
31 words
A method as defined in claim 1 wherein said resonator is tuned at least approximately tO one-fourth the wave length of the working frequency and is in communication with said generator.
Claim 9
Dependent Claim
31 words
A method as defined in claim 1 wherein said resonator is tuned at least approximately to one-fourth the wave length of the working frequency and is in communication with said pickup.
Claim 10
Dependent Claim
59 words
A method as described in claim 1, further comprising generating a second sound field within a second resonator at the same working frequency and under the same conditions as said main resonator, measuring the resonance conditions in said second resonator, and comparing the measured resonance conditions of said main resonator with the measured resonance conditions of said second resonator.
Claim 11
Dependent Claim
33 words
A method as described in claim 9, wherein said step of comparing is performed by regulating the frequency of said sound field in response to the measured resonance conditions of said second resonator.
Claim 12
Independent Claim
98 words
An apparatus for determining the cross-section of products of the textile industry, especially yarns, rovings and slivers, comprising means for generating sound at a preselected working frequency, sound pickup means disposed in spaced relationship to said sound generating means, at least one hollow resonator cavity positioned between said sound generating means and said sound pickup means and being tuned to said working frequency or a harmonic thereof, said sound generating means establishing a sound field within said resonator cavity, to thereby create a standing wave therein, and means for guiding a textile product through said hollow resonator cavity.
Claim 13
Independent Claim
98 words
An apparatus for determining the cross-section of products of the textile industry, especially yarns, rovings and slivers, comprising means for generating sound at a preselected working frequency, sound pickup means disposed in spaced relationship to said sound generating means, at least one hollow resonator cavity positioned between said sound generating means and said sound pickup means and being tuned to said working frequency or a harmonic thereof, said sound generating means establishing a sound field within said resonator cavity, to thereby create a standing wave therein, and means for guiding a textile product through said hollow resonator cavity.
Claim 14
Dependent Claim
30 words
An apparatus as defined in claim 11 wherein said sound field is tuned at least approximately to half the wave length of the working frequency or one of its harmonics.
Claim 15
Dependent Claim
29 words
An apparatus as defined in claim 12 wherein said means for guiding a textile product passes the product in the vicinity of the maximum velocity of the standing wave.
Claim 16
Dependent Claim
29 words
An apparatus as defined in claim 12 wherein said means for guiding a textile product passes the product in the vicinity of the minimum pressure of the standing wave.
Claim 17
Dependent Claim
29 words
An apparatus as defined in claim 12 wherein said means for guiding a textile product passes the product in the vicinity of the maximum pressure of the standing wave.
Claim 18
Dependent Claim
29 words
An apparatus as defined in claim 12 wherein said means for guiding a textile product passes the product in the vicinity of the minimum velocity of the standing wave.
Claim 19
Dependent Claim
40 words
An apparatus as defined in claim 12 wherein said resonator is tuned at least approximately to one-fourth the wave length of the working frequency or one of its harmonics and is disposed with one end at said sound generating means.
Claim 20
Dependent Claim
40 words
An apparatus as defined in claim 12 wherein said resonator is tuned at least approximately to one-fourth the wave length of the working frequency or one of its harmonics and is disposed with one end at said sound pickup means.
Claim 21
Dependent Claim
73 words
An apparatus as defined in claim 12 including first and second resonators tuned approximately to one-fourth the wave length of the working frequency or one of its harmonics, said first resonator having one end disposed at said sound generating means and said second resonator being coextensive with said first resonator and having one end at said sound pickup means with a space for passage of said textile product being provided between said resonators.
Claim 22
Dependent Claim
61 words
An apparatus as defined in claim 12, further including reference sound generating means for generating a sound field in a second resonator at said working frequency, reference sound pickup means disposed in spaced relationship to said reference sound generating means, and comparison means for comparing the measured resonance conditions of said resonator with the measured resonance conditions of said second resonator.
Claim 23
Dependent Claim
49 words
An apparatus as defined in claim 20 wherein said comparison means includes a phase discriminator connected between said reference sound pickup means and said sound generating means for regulating the frequency of thE sound field in said resonator in accordance with the measured resonance conditions in said second resonator.
Claim 24
Dependent Claim
40 words
An apparatus as defined in claim 21 wherein the frequency of said reference sound is adjusted to provide operation on the phase characteristic of the sound field at a point situated at the boundary of the substantially linear portion thereof.
References Cited (Backward Citations)
US2538444A
Cited
GB710124A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-08-06 | 1977-02-05 | 1977-08-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-08-06 | 1981-02-05 | 1981-08-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-08-06 | 1985-02-05 | 1985-08-07 | $7700.00 | Window Closed / Lapsed |