US4015414A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Monitored twist control apparatus and method
Assignee: Warner and Swasey Co
•
Filing: 1975-02-20
•
Granted: 1977-04-05
•
Expires: 1995-02-20
Abstract
Abstract A development is provided for monitoring twist on yarn being perferably friction twisted and for automatically adjusting the amount of twist being imparted to the yarn to compensate for a deviation in the amount of twist from that desired. The adjustment and monitoring may be effected on a position-to-position basis. Particularly novel monitoring developments are provided.
Inventors
- 👤 William C. Sholly, Jr.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 22:40
CPC Classifications
D; D02; D02G; D02G1/00; D02G1/02; D02G1/04; D02G1/08; D02G1/082
Claims Analysis
Total Claims: 39
Claim 1
Independent Claim
183 words
In yarn false twisting wherein yarn travles along a predetermined path and has twist applied thereto, the process of obtaining improved twist uniformity by the steps of a. continuously applying twist to yarn travelling along its path; b. continuously monitoring the amount of twist in yarn travelling along the path by i. first setting the axis of an arcuately moveable member at a predetermined fixed angle with the yarn path, the fixed angle corresponding to the desired amount of twist in the yarn, and ii. then sliding the yarn over the arcuately moveable member, iii. detecting a deviation from the desired amount of twist in the yarn as a function of an imbalance of forces resulting from longitudinal and rotational movement of the yarn relative to the arcuately moveable member as expressed by arcuate movement about its axis of the moveable member while maintaining said set angle fixed, and c. adjusting the amount of twist being applied to yarn travelling along the path in response to the movement of the moveable member, in compensation for the deviation in amount of twist so detected.
Claim 2
Dependent Claim
183 words
In yarn false twisting wherein yarn travles along a predetermined path and has twist applied thereto, the process of obtaining improved twist uniformity by the steps of a. continuously applying twist to yarn travelling along its path; b. continuously monitoring the amount of twist in yarn travelling along the path by i. first setting the axis of an arcuately moveable member at a predetermined fixed angle with the yarn path, the fixed angle corresponding to the desired amount of twist in the yarn, and ii. then sliding the yarn over the arcuately moveable member, iii. detecting a deviation from the desired amount of twist in the yarn as a function of an imbalance of forces resulting from longitudinal and rotational movement of the yarn relative to the arcuately moveable member as expressed by arcuate movement about its axis of the moveable member while maintaining said set angle fixed, and c. adjusting the amount of twist being applied to yarn travelling along the path in response to the movement of the moveable member, in compensation for the deviation in amount of twist so detected.
Claim 3
Dependent Claim
15 words
The process of claim 1, wherein the step of continuously applying twist comprises friction twisting.
Claim 4
Dependent Claim
35 words
The process of claim 2, wherein the friction twisting step includes the yarn in a barrier between a rotating high friction member and a lower friction member disposed in opposition to the high friction member.
Claim 5
Dependent Claim
62 words
The process of claim 3, wherein the adjusting is automatic and in direct response to the arcuate movement of the moveable member reaching a predetermined magnitude, wherein the yarn travels along a longitudinal path having a lateral displacement therein, and wherein said adjusting includes varying the amount of lateral displacement of the moving yarn by lateral movement of the lower friction member.
Claim 6
Dependent Claim
26 words
The process of claim 1, wherein the adjusting is automatic and in direct response to the arcuate movement of the moveable member reaching a predetermined magnitude.
Claim 7
Dependent Claim
33 words
The process of claim 1, wherein the yarn travels along a longitudinal path having a lateral displacement therein, and wherein said adjusting includes varying the amount of lateral displacement of the moving yarn.
Claim 8
Dependent Claim
145 words
In yarn false twisting on a production basis, wherein a plurality of yarns travel each along its predetermined path and wherein each has twist applied thereto along its path at its own twist-applying station, the process of obtaining improved twist uniformity from station-to-station by the steps of a. continuously applying twist to each of the yarns as they travel along their paths, b. regularly monitoring separately the amount of twist in each yarn travelling along its path to detect deviations in the amount of twist from the desired amount of twist, separately with respect to each of the yarns, and c. adjusting independently of any other station the amount of twist being applied at any station having an unacceptable amount of twist being applied thereat, in response to and in compensation for a deviation from the desired amount of twist as detected during the monitoring.
Claim 9
Dependent Claim
145 words
In yarn false twisting on a production basis, wherein a plurality of yarns travel each along its predetermined path and wherein each has twist applied thereto along its path at its own twist-applying station, the process of obtaining improved twist uniformity from station-to-station by the steps of a. continuously applying twist to each of the yarns as they travel along their paths, b. regularly monitoring separately the amount of twist in each yarn travelling along its path to detect deviations in the amount of twist from the desired amount of twist, separately with respect to each of the yarns, and c. adjusting independently of any other station the amount of twist being applied at any station having an unacceptable amount of twist being applied thereat, in response to and in compensation for a deviation from the desired amount of twist as detected during the monitoring.
Claim 10
Dependent Claim
13 words
The process of claim 7, wherein the monitoring at each station is continuous.
Claim 11
Dependent Claim
24 words
The process of claim 7, wherein the adjusting is automatic and in direct response to the detected deviation from the desired amount of twist.
Claim 12
Dependent Claim
124 words
The process of claim 7, wherein the monitoring step at each station is continuously accomplished with respect to the yarn path at each station by separately and independently: a. first setting the axis of an arcuately moveable member at a predetermined fixed angle with the yarn path, the fixed angle corresponding to the desired amount of twist in the yarn, and b. then sliding the yarn over the arcuately moveable member, c. detecting a deviation from the desired amount of twist in the yarn as a function of an imbalance of force resulting from longitudinal rotational movement of the yarn relative to the arcuately moveable member as expressed by arcuate movement about its axis of the moveable member while maintaining said set angle fixed.
Claim 13
Dependent Claim
26 words
The process of claim 10, wherein the adjusting is automatic and in direct response to the arcuate movement of the moveable member reaching a predetermined magnitude.
Claim 14
Dependent Claim
33 words
The process of claim 11, wherein the yarn travels along a longitudinal path having a lateral displacement therein, and wherein said adjusting includes varying the amount of lateral displacement of the moving yarn.
Claim 15
Dependent Claim
168 words
Apparatus for use in yarn false twisting for obtaining improved twist uniformity comprising means defining a predetermined path of yarn travel, means for continuously applying twist to yarn travelling along the path, means for monitoring the amount of twist in yarn travelling along the path, said monitoring means including: a. an arcuately moveable member having an axis of movement that is fixedly disposed at a predetermined fixed angle with the yarn path, which angle corresponds to the desired amount of twist in the yarn, and said moveable member being mounted at said angle for sliding movement of yarn there over, b. means for detecting a deviation from the desired amount of twist in the yarn as a function of arcuate movement of said moveable member while said angle is fixed, and means for adjusting the amount of twist being applied to yarn travelling along said path in response to arcuate movement of said moveable member and in compensation for the deviation in the amount of twist so detected.
Claim 16
Dependent Claim
168 words
Apparatus for use in yarn false twisting for obtaining improved twist uniformity comprising means defining a predetermined path of yarn travel, means for continuously applying twist to yarn travelling along the path, means for monitoring the amount of twist in yarn travelling along the path, said monitoring means including: a. an arcuately moveable member having an axis of movement that is fixedly disposed at a predetermined fixed angle with the yarn path, which angle corresponds to the desired amount of twist in the yarn, and said moveable member being mounted at said angle for sliding movement of yarn there over, b. means for detecting a deviation from the desired amount of twist in the yarn as a function of arcuate movement of said moveable member while said angle is fixed, and means for adjusting the amount of twist being applied to yarn travelling along said path in response to arcuate movement of said moveable member and in compensation for the deviation in the amount of twist so detected.
Claim 17
Dependent Claim
15 words
The apparatus of claim 13, wherein said means for applying twist comprises friction twisting means.
Claim 18
Dependent Claim
58 words
The apparatus of claim 14, wherein said friction twisting means comprises at least one pair of rotatable barrier members, with one member of the pair comprising a high friction member and the other member comprising a low friction member disposed in opposition thereto, sufficiently closely spaced to define therebetween a barrier through which yarn being twisted cannot pass.
Claim 19
Dependent Claim
18 words
The apparatus of claim 13, wherein said arcuately moveable member comprises a roller, pivotally moveable about an axis.
Claim 20
Dependent Claim
64 words
The apparatus of claim 13, wherein said means for detecting comprise switch means mounted relative to said arcuately moveable member and operatively connected to said adjusting means, and including means for automatically actuating said switch means upon a predetermined arcuate movement of said pivotally moveable member in either a clockwise or counterclockwise direction, in direct response to arcuate movement of said arcuately moveable member.
Claim 21
Dependent Claim
49 words
The apparatus of claim 17, wherein said means for actuating comprise magnet means carried by said arcuately moveable member for movement therewith for inducing a magnetic field of strength that varies with the arcuate movement of the moveable member and wherein said switch means are of the magnetic-field-responsive type.
Claim 22
Dependent Claim
50 words
The apparatus of claim 18, wherein said adjusting means includes a reversible motor adapted for rotation in either direction, and said switch means is operably connected thereto for driving the motor in a given direction depending upon the direction of and amount of arcuate movement of the arcuately moveable member.
Claim 23
Dependent Claim
50 words
The apparatus of claim 17, wherein said means for applying twist includes a rotatable high friction member for engagement with yarn travelling along the path and said adjusting means includes means for varying the lateral displacement of yarn moving along its path at the location of said high friction member.
Claim 24
Dependent Claim
56 words
The apparatus of claim 20, wherein said high friction member defines a barrier with a lower friction member through which yarn will not pass, and said means for varying the lateral displacement comprises means for moving the lower friction member and said barrier to increase the amount of contact of yarn with said high friction member.
Claim 25
Dependent Claim
106 words
The apparatus of claim 21, wherein said means for actuating comprise magnet means carried by said arcuately moveable member for movement therewith for inducing a magnetic field of strength that varies with the arcuate movement of the moveable member and wherein said switch means are of the magnetic-field-responsive type, wherein said adjusting means includes a reversible motor adapted for rotation in either direction, and said switch means is operably connected thereto for driving the motor in a given direction depending upon the direction of and amount of arcuate movement of the arcuately moveable member, and wherein said means for varying the lateral displacement comprises said motor.
Claim 26
Dependent Claim
138 words
Apparatus for use in false twisting yarn on a production basis for obtaining improved twist uniformity from station-to-station, comprising means defining a plurality of separate predetermined paths of yarn travel, each path having its own twist-applying station, means for applying twist to each of the yarns as it travels along its path, means for regularly monitoring separately the amount of twist in each yarn travelling along its path to detect deviations in the amount of twist from the desired amount of twist, separately with respect to each of the yarns, and means for adjusting independently of any other station the amount of twist being applied at any station having an unacceptable amount of twist being applied thereat, in response to and in compensation for a deviation from the desired amount of twist as detected by said monitoring means.
Claim 27
Dependent Claim
138 words
Apparatus for use in false twisting yarn on a production basis for obtaining improved twist uniformity from station-to-station, comprising means defining a plurality of separate predetermined paths of yarn travel, each path having its own twist-applying station, means for applying twist to each of the yarns as it travels along its path, means for regularly monitoring separately the amount of twist in each yarn travelling along its path to detect deviations in the amount of twist from the desired amount of twist, separately with respect to each of the yarns, and means for adjusting independently of any other station the amount of twist being applied at any station having an unacceptable amount of twist being applied thereat, in response to and in compensation for a deviation from the desired amount of twist as detected by said monitoring means.
Claim 28
Dependent Claim
13 words
The apparatus of claim 23, wherein said monitoring means comprises continuous monitoring means.
Claim 29
Dependent Claim
25 words
The apparatus of claim 23, wherein said adjusting means comprises automatic adjusting means operable in response to a deviation from a desired amount of twist.
Claim 30
Dependent Claim
101 words
The apparatus of claim 23, wherein said monitoring means comprises continuous monitoring means and includes at each said station: a. an arcuately moveable member having an axis of movement that is fixedly disposed at a predetermined fixed angle with the yarn path, which angle corresponds to the desired amount of twist in the yarn, and said moveable member being mounted at said angle for sliding movement of yarn there over, and b. means for detecting a deviation from the desired amount of twist in the yarn as a function of arcuate movement of said moveable member while said angle is fixed.
Claim 31
Dependent Claim
77 words
The apparatus of claim 26, wherein said means for applying twist comprises friction twisting means, and wherein said means for detecting each comprise switch means relative to said arcuately moveable member and operatively connected to said adjusting means, and including means for automatically actuating said switch means upon a predetermined arcuate movement of an associated said pivotally moveable member in either a clockwise or counterclockwise direction, in direct response to arcuate movement of said arcuately moveable member.
Claim 32
Dependent Claim
77 words
The apparatus of claim 27, wherein said means for applying twist includes a rotatable high friction member at each said station, for engagement with yarn travelling along the path, and with said adjusting means at each said station including means for varying the lateral displacement of yarn moving along its path at the location of said high friction member, for adjusting the amount of contact of yarn at that station with its associated said high friction member.
Claim 33
Dependent Claim
111 words
In an apparatus for applying twist of some type to yarn or the like, a means for monitoring the amount of twist in the yarn, said monitoring means including an arcuately moveable member having an axis of movement that is adapted to be fixedly disposed at a predetermined fixed angle with the yarn path, which angle corresponds to the desired amount of twist in the yarn, and with said moveable member being adapted for disposition at said angle for a sliding movement of yarn thereover, and including means for detecting a deviation from the desired amount of twist in the yarn as a function of arcuate movement of said moveable member.
Claim 34
Dependent Claim
111 words
In an apparatus for applying twist of some type to yarn or the like, a means for monitoring the amount of twist in the yarn, said monitoring means including an arcuately moveable member having an axis of movement that is adapted to be fixedly disposed at a predetermined fixed angle with the yarn path, which angle corresponds to the desired amount of twist in the yarn, and with said moveable member being adapted for disposition at said angle for a sliding movement of yarn thereover, and including means for detecting a deviation from the desired amount of twist in the yarn as a function of arcuate movement of said moveable member.
Claim 35
Dependent Claim
19 words
The monitoring apparatus of claim 29, wherein said arcuately moveable member comprises a roller, pivotally moveable about an axis.
Claim 36
Dependent Claim
58 words
The monitoring apparatus of claim 29, wherein said means for detecting comprise switch means mounted relative to said arcuately moveable member, and including means for automatically actuating said switch means upon a predetermined arcuate movement of said pivotally moveable member in either a clockwise or counterclockwise direction, in direct response to arcuate movement of said arcuately moveable member.
Claim 37
Dependent Claim
49 words
The apparatus of claim 31, wherein said means for actuating comprise magnet means carried by said arcuately moveable member for movement therewith for inducing a magnetic field of strength that varys with the arcuate movement of the moveable member and wherein said switch means are of the magnetic-field-responsive type.
Claim 38
Independent Claim
108 words
A method of monitoring the amount of twist in yarn traveling along a predetermined path by i. first setting the axis of an arcuately moveable member at a predetermined fixed angle with the yarn path, the fixed angle corresponding to the desired amount of twist in the yarn, and ii. then sliding the yarn over the arcuately moveable member, and iii. detecting a deviation from the desired amount of twist in the yarn as a function of an imbalance of forces resulting from longitudinal and rotational movement of the yarn relative to the arcuate movement about its axis of the moveable member while maintaining said set angle fixed.
Claim 39
Independent Claim
108 words
A method of monitoring the amount of twist in yarn traveling along a predetermined path by i. first setting the axis of an arcuately moveable member at a predetermined fixed angle with the yarn path, the fixed angle corresponding to the desired amount of twist in the yarn, and ii. then sliding the yarn over the arcuately moveable member, and iii. detecting a deviation from the desired amount of twist in the yarn as a function of an imbalance of forces resulting from longitudinal and rotational movement of the yarn relative to the arcuate movement about its axis of the moveable member while maintaining said set angle fixed.
References Cited (Backward Citations)
US3405556A
Cited
US3593508A
Cited
US3685273A
Cited
US3667292A
Cited
US3613347A
Cited
US3724196A
Cited
US3705487A
Cited
US3811258A
Cited
US3705488A
Cited
US3813868A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1980-04-04 | 1980-10-04 | 1981-04-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-04-04 | 1984-10-04 | 1985-04-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-04-04 | 1988-10-04 | 1989-04-05 | $7700.00 | Window Closed / Lapsed |