US4330094A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and apparatus for measuring the length of a thread withdrawn overhead from a thread carrier
Assignee: Individual
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Filing: 1980-03-10
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Granted: 1982-05-18
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Expires: 2000-03-10
Abstract
Abstract There is measured the length of a thread withdrawn overhead from a spinning cop or from a yarn bobbin. In order to circumvent the fault sources caused by slip and/or thread elongation there is generated a signal which periodically varies in accordance with the movement of the thread release or detachment point at the spinning cop or at the yarn bobbin, as the case may be, and there are counted the number of cycles of the fundamental frequency of this signal. The thread length is obtained by multiplication of the counted number of cycles by the constant thread length of two successive winding layers for spinning cops or yarn bobbins of the same origin and the same thread. The periodic signal can be derived from the thread withdrawal force or from the number of revolutions of the detachment point. The method is particularly suitable when rewinding a number of spinning cops on to a cross-wound bobbin.
Inventors
- 👤 Stephan Mayer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 10:12
CPC Classifications
G; G01; G01B; G01B7/00; G01B7/02; G01B7/04; G01B7/042; B; B65; B65H; B65H61/00; B65H2701/00; B65H2701/30; B65H2701/31
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
100 words
A method of measuring the length of a thread withdrawn overhead from a thread carrier, in particular a spinning cop or a random cross-wound bobbin, comprising the steps of: keeping the thread carrier stationary; withdrawing the thread from overhead of the thread carrier, thus causing the thread detachment point at the thread carrier to perform a movement, such movement comprising an axially reciprocating component; generating a signal which periodically varies in accordance with the axially reciprocating component of the movement of the thread detachment poin at the thread carrier; and counting the cycles of the fundamental frequency of such signal.
Claim 2
Independent Claim
100 words
A method of measuring the length of a thread withdrawn overhead from a thread carrier, in particular a spinning cop or a random cross-wound bobbin, comprising the steps of: keeping the thread carrier stationary; withdrawing the thread from overhead of the thread carrier, thus causing the thread detachment point at the thread carrier to perform a movement, such movement comprising an axially reciprocating component; generating a signal which periodically varies in accordance with the axially reciprocating component of the movement of the thread detachment poin at the thread carrier; and counting the cycles of the fundamental frequency of such signal.
Claim 3
Dependent Claim
25 words
The method as defined in claim 1, further including the steps of: deriving the periodic signal from the periodic variations of the thread withdrawal force.
Claim 4
Dependent Claim
34 words
The method as defined in claim 1, further including the steps of: deriving the periodic signal from the periodic variations of the number of revolutions of the thread detachment point at the thread carrier.
Claim 5
Dependent Claim
27 words
The method as defined in claim 1, further including the steps of: generating an output signal when the number of counted cycles has reached a preset value.
Claim 6
Dependent Claim
68 words
The method as defined in claim 1, further including the steps of: said thread carrier defining a first thread carrier; providing a further thread carrier onto which there is wound the thread withdrawn from the first thread carrier; and cutting the thread withdrawn from the first thread carrier and infed to the further thread carrier as soon as the number of counted cycles has reached a pretermined value.
Claim 7
Dependent Claim
16 words
The method as defined in claim 5, wherein: the further thread carrier is a cross-wound package.
Claim 8
Independent Claim
126 words
An apparatus for measuring the length of a thread withdrawn overhead from a thread carrier comprising: a thread carrier, in particular a spinning cop or a random cross-wound bobbin, from which the thread is withdrawn overhead and the thread detachment point at the thread carrier has an axially reciprocating component of movement with respect to the thread carrier; means for withdrawing the thread off of said thread carrier; signal generating means arranged following the thread carrier for detecting the course of the withdrawn thread and for producing a signal periodically varying in unison with the axially reciprocating component of the movment of the thread detachment point at the thread carrier when thread is being withdrawn therefrom; and counter means operatively coupled to said signal generating means.
Claim 9
Independent Claim
126 words
An apparatus for measuring the length of a thread withdrawn overhead from a thread carrier comprising: a thread carrier, in particular a spinning cop or a random cross-wound bobbin, from which the thread is withdrawn overhead and the thread detachment point at the thread carrier has an axially reciprocating component of movement with respect to the thread carrier; means for withdrawing the thread off of said thread carrier; signal generating means arranged following the thread carrier for detecting the course of the withdrawn thread and for producing a signal periodically varying in unison with the axially reciprocating component of the movment of the thread detachment point at the thread carrier when thread is being withdrawn therefrom; and counter means operatively coupled to said signal generating means.
Claim 10
Dependent Claim
66 words
The apparatus as defined in claim 7, wherein: said signal generating means comprises a thread tension force-measuring head means for delivering an electrical signal which varies periodically in accordance with the periodic variations of the tension of the thread being withdrawn; said counter means comprising a pre-selection counter; and low-pass filter means for delivering said electrical signal from said measuring head means to said pre-selection counter.
Claim 11
Dependent Claim
18 words
The apparatus as defined in claim 8, further including: signal shaper means arranged following said low-pass filter means.
Claim 12
Dependent Claim
16 words
The apparatus as defined in claim 9, wherein: said signal shaper means comprises voltage comparator means.
Claim 13
Dependent Claim
16 words
The apparatus as defined in claim 9, wherein: said signal shaper means comprises a monostable multivibrator.
Claim 14
Dependent Claim
53 words
The apparatus as defined in claim 7, wherein: said signal generating means comprises a contactless signal transmitter for detecting the periodic variations of the number of revolutions of a balloon formed by the thread withdrawn from the thread carrier, sid signal transmitter being coupled via a measuring value converter to said counter means.
Claim 15
Dependent Claim
16 words
The apparatus as defined in claim 12, wherein: said signal transmitter comprises a photoelectric signal transmitter.
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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) | 1985-05-17 | 1985-11-16 | 1986-05-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-05-17 | 1989-11-16 | 1990-05-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-05-17 | 1993-11-16 | 1994-05-18 | $7700.00 | Window Closed / Lapsed |