US3760576A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Spinning frame having bowl spindles
Assignee: ALSACIENNE DE CONSTR MECANIQUE
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Filing: 1971-06-17
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Granted: 1973-09-25
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Expires: 1991-06-17
Abstract
Abstract In a spinning frame having open end spinning spindles, the spinning process is to be prevented from becoming unprimed, if the frame stops, by a notched rod which may slide and turn in front of the outlets of the spindles. A tachometric device causes the rod to slide into a position for forming reserve loops in the threads, and ensures stoppage of the feed to the spindles and of the withdrawal of the threads when, through inertia, the spindles, ceasing to be driven, pass through a pre-determined spinning speed. On restarting, when passing through the same speed, the rod turns and the notches free the previously-formed reserve loops of thread.
Inventors
- 👤 Chatelier J Le
- 👤 Flaquiere R La
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 10:42
CPC Classifications
D; D01; D01H; D01H4/00; D01H4/42; D01H4/44
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
290 words
A device for avoiding de-priming upon stoppage of open end spinning spindles having outlets, said spindles being aligned on a frame and rotated by a main motor, in which said frame includes means for feeding the open end spinning spindles with fibers, and withdrawal means for the thread at the spindle outlets, said device comprising, in front of the outlets of the spindles a thread-guiding rod slidable in a direction perpendicular to the axes of the spindle, between an operational position in which each thread-guiding rod is in the normal path of the thread emerging from its corresponding open end spinning spindle, and a reserve position at a predetermined distance from said operative position, movement-control means opeRably related to the threadguiding rods for effecting the sliding of the rods, the threadguiding rod, being parallel to the direction of alignment of the bowl spindles, having thread-guiding notches, rotation control means, means mounting the rod to pivot under the action of the rotation-control means, the frame also comprising a tachometric device for actuating the translation-control means for placing the rod in the reserve position and ensuring stoppage of the means for feeding fibers to the open end spinning spindles and of the thread withdrawal means when, after stoppage of the main motor, the decreasing rotary speed of the spindles passes through a predetermined spinning speed and, for ensuring re-starting the means for feeding fibers to the spindles, and the thread withdrawal means, and for actuating the rotation-control means so that the thread-guiding notches suddenly free the threads when, after re-starting the main motor, the increasing rotary speed of the spindles passes through the above mentioned predetermined speed, and then for actuating the translation-control means for returning the rod to the operative position.
Claim 2
Independent Claim
290 words
A device for avoiding de-priming upon stoppage of open end spinning spindles having outlets, said spindles being aligned on a frame and rotated by a main motor, in which said frame includes means for feeding the open end spinning spindles with fibers, and withdrawal means for the thread at the spindle outlets, said device comprising, in front of the outlets of the spindles a thread-guiding rod slidable in a direction perpendicular to the axes of the spindle, between an operational position in which each thread-guiding rod is in the normal path of the thread emerging from its corresponding open end spinning spindle, and a reserve position at a predetermined distance from said operative position, movement-control means opeRably related to the threadguiding rods for effecting the sliding of the rods, the threadguiding rod, being parallel to the direction of alignment of the bowl spindles, having thread-guiding notches, rotation control means, means mounting the rod to pivot under the action of the rotation-control means, the frame also comprising a tachometric device for actuating the translation-control means for placing the rod in the reserve position and ensuring stoppage of the means for feeding fibers to the open end spinning spindles and of the thread withdrawal means when, after stoppage of the main motor, the decreasing rotary speed of the spindles passes through a predetermined spinning speed and, for ensuring re-starting the means for feeding fibers to the spindles, and the thread withdrawal means, and for actuating the rotation-control means so that the thread-guiding notches suddenly free the threads when, after re-starting the main motor, the increasing rotary speed of the spindles passes through the above mentioned predetermined speed, and then for actuating the translation-control means for returning the rod to the operative position.
Claim 3
Dependent Claim
87 words
The device as claimed in claim 1, in which the translation-control means for the thread-guiding rod is so designed and constructed that, on the one hand, said rod, on stoppage of the frame, after reaching its reserve position, retracts a short distance to allow the reserve loops to form a twist, absorbing the torsion of the loops of thread, before starting the spindles, and said rod starts by covering the above short distance, to reach its extreme reserve position and ensure reabsorption of the twists of thread.
Claim 4
Dependent Claim
36 words
The device as claimed in claim 1, in which the translation-control means of the thread-guiding rod comprises a fluid pressure ram having a piston and a spring influencing the piston at one end of its stroke.
Claim 5
Dependent Claim
47 words
The device as claimed in claim 1 including a tachometric device, a clutch controlled by the tachometric device, and the means for feeding fibers to the bowl spindles, and the thread withdrawal mens being driven by the main motor through the clutch controlled by the tachometric device.
Claim 6
Dependent Claim
51 words
The device as claimed in claim 1, in which the rotation-control means for the thread-guiding rod is so designed and constructed that said rod resumes its initial angular operatIve position immediately after turning to the position in which the notches free the threads which have been deflected from their normal path.
Claim 7
Dependent Claim
75 words
The device as claImed in claim 1 including a suction fan connected to the spindles, a manocontact sensitive to low pressure generated by the fan, a contactor controlled by the manocontact for supplying power to the main motor, a drive motor on the frame for the fan, a circuit for supplying power for the fan drive motor, and a stroke-limit switch actuated in response to the thread-guiding rod adopting its reserve-formation position controlling the circuit.
Claim 8
Dependent Claim
36 words
The device as claimed in claim 1 including longitudinal low-amplitude oscillating movement imparting means subjecting the thread-guiding rod, during the entire period of normal operation of the open end spinning spindles, to longitudinal low-amplitude oscillating movement.
Claim 9
Dependent Claim
38 words
The device as claimed in claim 7, including a slide connected to said translation-control means, the thread-guiding rod being supported by the slide and connected axially to said slide by the said longitudinal low-amplitude oscillating movement imparting means.
Claim 10
Dependent Claim
199 words
In a spinning frame having at least one open end spinning spindle, a device for avoiding de-priming upon stoppage of an open end spinning spindle, said device including a thread-guiding rod arranged substantially on the normal path of the thread emerging from the open end of the spinning spindle, support means supporting the thread-guiding rod for translational sliding and pivotal movements of the thread-guiding rod, at least one thread-guiding element on the thread-guidinG rod, translational sliding moveMent control means for moving the thread-guiding rod between an operative position in which the thread-guiding element is in the normal path of a thread emerging from the open end spinning spindle and a reserve position at a predetermined distance from the operative position, the thread-guiding rod being adapted to assume either an operative angular position in which the thread-guiding element can engage the thread and an a release angular position in which the thread-guiding element cannot retain the thread and pivotal movement control means for pivoting the thread-guiding rod out of the operative angular position with in the reserve position to allow the thread to abruptly freely disengage the thread-guiding element and to skid along the thread-guiding rod to its normal path.
Claim 11
Dependent Claim
199 words
In a spinning frame having at least one open end spinning spindle, a device for avoiding de-priming upon stoppage of an open end spinning spindle, said device including a thread-guiding rod arranged substantially on the normal path of the thread emerging from the open end of the spinning spindle, support means supporting the thread-guiding rod for translational sliding and pivotal movements of the thread-guiding rod, at least one thread-guiding element on the thread-guidinG rod, translational sliding moveMent control means for moving the thread-guiding rod between an operative position in which the thread-guiding element is in the normal path of a thread emerging from the open end spinning spindle and a reserve position at a predetermined distance from the operative position, the thread-guiding rod being adapted to assume either an operative angular position in which the thread-guiding element can engage the thread and an a release angular position in which the thread-guiding element cannot retain the thread and pivotal movement control means for pivoting the thread-guiding rod out of the operative angular position with in the reserve position to allow the thread to abruptly freely disengage the thread-guiding element and to skid along the thread-guiding rod to its normal path.
Claim 12
Dependent Claim
42 words
The device claimed in claim 9, for a frame with a plurality of open end spinning spindles, in which a plurality of thread-guiding elements are provided, and each of the thread-guiding elements being defined by a transverse notch in the thread-guiding rods.
Claim 13
Dependent Claim
33 words
The device as claimed in claim 10, in which the thread guiding rod is mounted for sliding movement in a direction at right angles to the axis of the open end spinnind spindle.
Claim 14
Dependent Claim
45 words
The device as claimed in claim 9 for a frame with a plurality of aligned open end spinning spindles, wherein the direction in which the thread-guiding rod is adapted to slide is parallel to the direction in which the open end spinning spindles are aligned.
Claim 15
Dependent Claim
157 words
The device as claimed in claim 9 further including a motor for rotating the open end spinning spindle, feeding means for feeding the open end spinning spindles with textile fibers, thread withdrawal means, and a tachometer device to actuate the translational sliding movement control means for placing the thread-guiding rod in the longitudinal reserve psoition and insuring stoppage of the feeding means and the withdrawal means, when, after stoppage of the open end spinning spindle driving motor, the decreasing rotary speed of the open end spinning spindle passes through a predetermined threshold spinning speed, and also for restarting the feeding means and the withdrawal means together with the thread-guiding rod pivoting means to temporarily position the thread-guiding element in thread-releasing position when the increasing rotational speed of the open end spinning spindle passes through the pre-determined threshold spinning speed, then to activate the translational sliding movement control means to reset the thread-guiding rod into the operative position.
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) | 1976-09-24 | 1977-03-26 | 1977-09-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-09-24 | 1981-03-26 | 1981-09-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-09-24 | 1985-03-26 | 1985-09-25 | $7700.00 | Window Closed / Lapsed |