Patent US3638873A successfully refreshed from Google Patents.
US3638873A
Expired / Lapsed
US
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Apparatus for winding yarn
Assignee: EIDP Inc
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Filing: 1970-08-12
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Granted: 1972-02-01
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Expires: 1990-08-12
Abstract
Abstract A system to control yarn tension in a multiposition winding apparatus in which a plurality of tension transducers are associated with preselected yarn lines for generating output signals indicative of yarn tension. A comparator controller system is coupled to the transducers to process and combine the transducer output signals to provide an error signal. A control unit responsive to the error signal changes the output of the windup motor power supply which, in turn, changes motor speed and, consequently, yarn tension. Circuitry is provided to monitor the error signal and inactivate the control unit if the error signal exceeds predetermined limits.
Inventors
- 👤 Harold Wade Cole
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 18:35
CPC Classifications
B; B65; B65H; B65H59/00; B65H59/38; B65H59/384; B65H2701/00; B65H2701/30; B65H2701/31
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
162 words
In a multiposition yarn-winding machine, each position including a package support driven by an electric motor, a common power supply means for regulating the speed of the motors, a system for regulating the tension in yarns advancing at a substantially constant speed from a source to said supports comprising: a plurality of sensors for detecting yarn tension at some of said positions; monitoring devices coupled to each sensor for generating first signals related to the magnitude of said yarn tension; means connected to said monitoring devices for combining said first signals that fall within predetermined limits into a second signal; a control unit connected to said power supply means and responsive to said second signal for changing the output of said power supply thereby changing the speed of the motors; and means for comparing said second signal with said predetermined limits and generating a third signal when said second signal exceeds said limits, said control unit being inactivated by said third signal.
Claim 2
Dependent Claim
162 words
In a multiposition yarn-winding machine, each position including a package support driven by an electric motor, a common power supply means for regulating the speed of the motors, a system for regulating the tension in yarns advancing at a substantially constant speed from a source to said supports comprising: a plurality of sensors for detecting yarn tension at some of said positions; monitoring devices coupled to each sensor for generating first signals related to the magnitude of said yarn tension; means connected to said monitoring devices for combining said first signals that fall within predetermined limits into a second signal; a control unit connected to said power supply means and responsive to said second signal for changing the output of said power supply thereby changing the speed of the motors; and means for comparing said second signal with said predetermined limits and generating a third signal when said second signal exceeds said limits, said control unit being inactivated by said third signal.
Claim 3
Dependent Claim
45 words
The system as defined in claim 1, including a time delay device connected between the means for generating the third signal and the control unit for delaying activation of the control unit by said second signal after it has been deactivated by said third signal.
Claim 4
Dependent Claim
33 words
The system as defined in claim 1, said control unit being a servocontrol unit including a servomotor coupled to a potentiometer, said potentiometer having an output lead connected to said power supply means.
Claim 5
Dependent Claim
32 words
The yarn-winding machine as defined in claim 1, each position including a roll driven by said electric motor for driving said package support, said yarn advancing around said roll to said support.
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) | 1975-01-31 | 1975-08-02 | 1976-02-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-01-31 | 1979-08-02 | 1980-02-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-01-31 | 1983-08-02 | 1984-02-01 | $7700.00 | Window Closed / Lapsed |