US3887814A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Yarn slub analyzer
Assignee: EIDP Inc
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Filing: 1973-11-01
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Granted: 1975-06-03
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Expires: 1993-11-01
Abstract
Abstract A system for determining and characterizing slub content of yarns according to their diameter and length is disclosed. Yarn passing at a uniform rate through a photoelectric transducer furnishes an electrical signal output according to the yarn profile. The signal output is processed through various circuit combinations so that slubs are characterized from signal differences about a base yarn diameter and slubs which are in preselected diameter and length categories are counted for a predetermined length of yarn.
Inventors
- 👤 Mark Edwin Faulhaber
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 11:54
CPC Classifications
G; G01; G01N; G01N33/00; G01N33/36; G01N33/365
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
140 words
In a yarn inspection system wherein yarn moves at a uniform rate past a photoelectric means for generating an electric signal output corresponding to instantaneous variations in yarn diameter and including electronic means responsive to said photoelectric means for processing said electric signal output, said electronic means comprising: an amplifier having input and output terminals, said input terminal being connected to said photoelectric means, said amplifier producing a voltage output signal from said electric output signal, an electrical circuit coupled to the amplifier input and output terminals for producing a time-averaged signal from said voltage output signal and for feeding said time-averaged signal back to the input terminal; means for maintaining said time-averaged signal constant and for providing an indication signal when said voltage output signal exceeds a predetermined minimum threshold value; and means for establishing said minimum threshold value.
Claim 2
Dependent Claim
140 words
In a yarn inspection system wherein yarn moves at a uniform rate past a photoelectric means for generating an electric signal output corresponding to instantaneous variations in yarn diameter and including electronic means responsive to said photoelectric means for processing said electric signal output, said electronic means comprising: an amplifier having input and output terminals, said input terminal being connected to said photoelectric means, said amplifier producing a voltage output signal from said electric output signal, an electrical circuit coupled to the amplifier input and output terminals for producing a time-averaged signal from said voltage output signal and for feeding said time-averaged signal back to the input terminal; means for maintaining said time-averaged signal constant and for providing an indication signal when said voltage output signal exceeds a predetermined minimum threshold value; and means for establishing said minimum threshold value.
Claim 3
Dependent Claim
34 words
The system as defined in claim 1, including means for measuring the duration of said indication signal and signaling each instance said duration exceeds a predetermined minimum time during a preselected period of time.
Claim 4
Dependent Claim
15 words
The system as defined in claim 2, further including means for integrating the durations signaled.
Claim 5
Dependent Claim
28 words
The system as defined in claim 1, including means for establishing a maximum threshold value and for signaling when said voltage output signal exceeds said maximum threshold signal.
Claim 6
Dependent Claim
166 words
In a yarn inspection system wherein yarn moves at a uniform rate past a photoelectric means for generating an electric signal output corresponding to instantaneous variations in yarn diameter and including electronic means responsive to said photoelectric means for processing said electric signal output, said electronic means comprising: an amplifier having input and output terminals, said input terminal being connected to said photoelectric means, said amplifier producing a voltage output signal from said electric output signal; an electrical circuit coupled to the amplifier input and output terminals for producing a timeaveraged signal from said voltage output signal and for feeding said time-averaged signal back to the input terminal; means for maintaining said time-averaged signal constant and for providing an indication signal when said voltage output signal exceeds a predetermined minimum threshold value; means for establishing said minimum threshold value; and means for measuring the duration of said indication signal and signaling each instance said duration exceeds a predetermined minimum time during a preselected period of time.
Claim 7
Dependent Claim
166 words
In a yarn inspection system wherein yarn moves at a uniform rate past a photoelectric means for generating an electric signal output corresponding to instantaneous variations in yarn diameter and including electronic means responsive to said photoelectric means for processing said electric signal output, said electronic means comprising: an amplifier having input and output terminals, said input terminal being connected to said photoelectric means, said amplifier producing a voltage output signal from said electric output signal; an electrical circuit coupled to the amplifier input and output terminals for producing a timeaveraged signal from said voltage output signal and for feeding said time-averaged signal back to the input terminal; means for maintaining said time-averaged signal constant and for providing an indication signal when said voltage output signal exceeds a predetermined minimum threshold value; means for establishing said minimum threshold value; and means for measuring the duration of said indication signal and signaling each instance said duration exceeds a predetermined minimum time during a preselected period of time.
Claim 8
Dependent Claim
166 words
In a yarn inspection system wherein yarn moves at a uniform rate past a photoelectric means for generating an electric signal output corresponding to instantaneous variations in yarn diameter and including electronic means responsive to said photoelectric means for processing said electric signal output, said electronic means comprising: an amplifier having input and output terminals, said input terminal being connected to said photoelectric means, said amplifier producing a voltage output signal from said electric output signal; an electrical circuit coupled to the amplifier input and output terminals for producing a time-averaged signal from said voltage output signal and for feeding said time-averaged signal back to the input terminal; means for maintaining said time-averaged signal constant and for providing an indication signal when said voltage output signal exceeds a predetermined minimum threshold value; means for establishing said minimum threshold value; and means for measuring the duration of said indication signal and signaling each instance said duration exceeds a predetermined minimum time during a preselected period of time.
Claim 9
Dependent Claim
166 words
In a yarn inspection system wherein yarn moves at a uniform rate past a photoelectric means for generating an electric signal output corresponding to instantaneous variations in yarn diameter and including electronic means responsive to said photoelectric means for processing said electric signal output, said electronic means comprising: an amplifier having input and output terminals, said input terminal being connected to said photoelectric means, said amplifier producing a voltage output signal from said electric output signal; an electrical circuit coupled to the amplifier input and output terminals for producing a time-averaged signal from said voltage output signal and for feeding said time-averaged signal back to the input terminal; means for maintaining said time-averaged signal constant and for providing an indication signal when said voltage output signal exceeds a predetermined minimum threshold value; means for establishing said minimum threshold value; and means for measuring the duration of said indication signal and signaling each instance said duration exceeds a predetermined minimum time during a preselected period of time.
Claim 10
Dependent Claim
15 words
The system as defined in claim 5, further including means for integrating the durations signaled.
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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) | 1978-06-02 | 1978-12-02 | 1979-06-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-06-02 | 1982-12-02 | 1983-06-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-06-02 | 1986-12-02 | 1987-06-03 | $7700.00 | Window Closed / Lapsed |