US4016790A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Regulation of electronically operated quality control equipment
Assignee: Zellweger Uster AG
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Filing: 1976-04-23
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Granted: 1977-04-12
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Expires: 1996-04-23
Abstract
Abstract This invention relates to the art of quality control, more particularly to the regulation of electronically operated quality control equipment such as yarn cleaners, or the like so that the quality control equipment may be selectively adjusted to eliminate faults of a given magnitude only when they occur over an undesired period.
Inventors
- 👤 Ernst Felix
- 👤 Hans Locher
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 06:35
CPC Classifications
G; G01; G01N; G01N33/00; G01N33/36; G01N33/365; B; B65; B65H; B65H63/00; B65H63/06; B65H63/062; B65H63/064; B65H2701/00; B65H2701/30; B65H2701/31; Y; Y10; Y10T; Y10T83/00; Y10T83/04; Y10T83/525; Y10T83/533; Y10T83/541; Y10T83/543
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
259 words
A yarn clearer comprising: sensing means along the path of travel of the yarn to be cleared providing an electrical signal representative of the controlled quality of the yarn; error correcting means such as a yarn cutter interposed in the path of travel of the yarn to be cleared; a first electrical channel electrically coupled between said sensing means and said error correcting means to receive the electrical signal from said sensing means; a threshold switch in said first channel, said threshold switch being the only threshold means in said first channel controlling the passage of a signal through said first channel to said error correcting means, said threshold switch set to pass only signals from said sensing means to said error correcting means which are indicative of yarn thickness of undesired magnitude; a second electrical channel independent of said first channel electrically coupled between said sensing means and said error correcting means, to receive the electrical signal from said sensing means; integrating means in said second channel, said integrating means only passing signals of given frequency of occurrence or duration, and a second threshold switch in said second electrical channel, said second threshold switch receiving any signal passed by said integrating means, said second threshold switch being the only threshold switch controlling the passage of a signal through said second channel to said error correcting means and set to pass integrated signals of given magnitude, whereby the yarn clearer may independently correct either yarn defects of given magnitude or yarn defects occuring over a given length of yarn.
Claim 2
Dependent Claim
259 words
A yarn clearer comprising: sensing means along the path of travel of the yarn to be cleared providing an electrical signal representative of the controlled quality of the yarn; error correcting means such as a yarn cutter interposed in the path of travel of the yarn to be cleared; a first electrical channel electrically coupled between said sensing means and said error correcting means to receive the electrical signal from said sensing means; a threshold switch in said first channel, said threshold switch being the only threshold means in said first channel controlling the passage of a signal through said first channel to said error correcting means, said threshold switch set to pass only signals from said sensing means to said error correcting means which are indicative of yarn thickness of undesired magnitude; a second electrical channel independent of said first channel electrically coupled between said sensing means and said error correcting means, to receive the electrical signal from said sensing means; integrating means in said second channel, said integrating means only passing signals of given frequency of occurrence or duration, and a second threshold switch in said second electrical channel, said second threshold switch receiving any signal passed by said integrating means, said second threshold switch being the only threshold switch controlling the passage of a signal through said second channel to said error correcting means and set to pass integrated signals of given magnitude, whereby the yarn clearer may independently correct either yarn defects of given magnitude or yarn defects occuring over a given length of yarn.
Claim 3
Dependent Claim
131 words
Apparatus for regulation the operation of quality control equipment such as yarn clearers having sensing means providing an electrical signal representative of the controlled quality such as yarn thickness and error correcting means such as yarn cutters, said apparatus comprising: at least two independent channels coupled to the sensing means to receive the output signal therefrom, one channel tuned to the signals indicative of faults exceeding a given magnitude, the other tuned to faults exceeding a given frequency of occurrence or duration; a separate triggering switch for each channel coupled to receive as an input signal the signal output of each channel when a limiting value selected for each of said channels is exceeded; and a separate electrical connection between said triggering switch of each channel and the error correcting means.
Claim 4
Dependent Claim
131 words
Apparatus for regulation the operation of quality control equipment such as yarn clearers having sensing means providing an electrical signal representative of the controlled quality such as yarn thickness and error correcting means such as yarn cutters, said apparatus comprising: at least two independent channels coupled to the sensing means to receive the output signal therefrom, one channel tuned to the signals indicative of faults exceeding a given magnitude, the other tuned to faults exceeding a given frequency of occurrence or duration; a separate triggering switch for each channel coupled to receive as an input signal the signal output of each channel when a limiting value selected for each of said channels is exceeded; and a separate electrical connection between said triggering switch of each channel and the error correcting means.
Claim 5
Dependent Claim
22 words
An apparatus according to claim 2 provided with at least one control for each channel, permitting adjustment of the signal passed thereby.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1980-04-11 | 1980-10-11 | 1981-04-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-04-11 | 1984-10-11 | 1985-04-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-04-11 | 1988-10-11 | 1989-04-12 | $7700.00 | Window Closed / Lapsed |