Patent US4058245A successfully refreshed from Google Patents.
US4058245A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Yarn control mechanisms and the like
Assignee: National Research Development Corp UK
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Filing: 1976-09-30
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Granted: 1977-11-15
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Expires: 1996-09-30
Abstract
Abstract A rotating yarn control element comprises a hub portion with a number of pins spaced around the periphery of the hub portion to define for the yarn a zig-zag path which degenerates with increasing distance from the axis of rotation of the element into a line path lying in a reference plane of the element. In use, with the element rotating about its axis and the yarn passing through the path defined by the guide surfaces, the total area of contact between the guide surfaces and the yarn will depend on the distance of the yarn from the axis of rotation of the element. This in turn determines whether the element operates in the "freewheeling" mode, the "positive grip" mode or the "yarn metering" mode. Other embodiments are described in which the element is formed by an injection moulding technique and the zig-zag path is presented by tooth like projections or by a channel in a drum member. A means for varying the amount of wrap around the element is also described. The elements can be used to control materials other than yarns although if they are to be used with rigid articles e.g. metal rods or tubes, then the projections presenting the guide surfaces on the element must be made of flexible material.
Inventors
- 👤 Francis Neil Hurt
- 👤 Reginald Theaker
- 👤 David Herbert Plant
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 17:50
CPC Classifications
B; B65; B65H; B65H51/00; B65H51/02; B65H51/04; B65H51/06; B65H59/00; B65H59/10; B65H2701/00; B65H2701/30; B65H2701/31
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
242 words
A rotatable control system for yarn or like material comprising in combination: an element having an outer cylindrical peripheral surface extending substantially parallel to said element's axis of rotation, said surface being accessible to the yarn to make continuous contact therewith for the length of yarn along the surface, said surface having a number of discrete guide surfaces, at least in part, staggered about an imaginary reference plane which is perpendicular to said axis of rotation of said element, alternate ones of said number of said discrete guide surfaces providing a first set of such surfaces each of which bend only in a first direction relative to said reference plane, and the intervening ones of said guide surfaces providing a second set of said surfaces, each of which bends only in the opposite direction to said first direction, the divergence of adjacent surfaces relative to said reference plane increasing with increasing distance from said axis of rotation to define, for the material, a zig-zag path which degenerates with increasing distance from said axis of rotation of said element into a line path lying in said reference plane of said element; and control means for varying the distance of the yarn from said element axis of rotation to thereby vary the tension applied by said element as it is rotated including first and second guide members pivotably mounted about said axis of rotation and each mounting means for guiding passage of said yarn.
Claim 2
Dependent Claim
242 words
A rotatable control system for yarn or like material comprising in combination: an element having an outer cylindrical peripheral surface extending substantially parallel to said element's axis of rotation, said surface being accessible to the yarn to make continuous contact therewith for the length of yarn along the surface, said surface having a number of discrete guide surfaces, at least in part, staggered about an imaginary reference plane which is perpendicular to said axis of rotation of said element, alternate ones of said number of said discrete guide surfaces providing a first set of such surfaces each of which bend only in a first direction relative to said reference plane, and the intervening ones of said guide surfaces providing a second set of said surfaces, each of which bends only in the opposite direction to said first direction, the divergence of adjacent surfaces relative to said reference plane increasing with increasing distance from said axis of rotation to define, for the material, a zig-zag path which degenerates with increasing distance from said axis of rotation of said element into a line path lying in said reference plane of said element; and control means for varying the distance of the yarn from said element axis of rotation to thereby vary the tension applied by said element as it is rotated including first and second guide members pivotably mounted about said axis of rotation and each mounting means for guiding passage of said yarn.
Claim 3
Dependent Claim
36 words
A system as in claim 1, wherein said means comprises first and second guide member pivotably mounted for rotation about said axis of rotation and each yarn guidance means is an eyelet through which yarn passes.
Claim 4
Dependent Claim
24 words
An system as claimed in claim 1 in which the guide surfaces are provided by projections extending from a hub portion of the device.
Claim 5
Dependent Claim
18 words
An system as claimed in claim 3 in which the projections are of circular or part circular cross-section.
Claim 6
Dependent Claim
16 words
An system as claimed in claim 3 in which the projections take the form of rods.
Claim 7
Dependent Claim
17 words
An system as claimed in claim 3 in which the projections take the form of "tooth"-like projections.
Claim 8
Dependent Claim
39 words
An system as claimed in claim 1 in which the guide surfaces are provided by a drum member and take the form of a zig-zag channel widening with increasing distance from the axis of rotation of the control element.
Claim 9
Dependent Claim
44 words
A system as in claim 1, wherein said control means comprises a cylindrical bar extending substantially parallel to said axis of rotation and means for mounting said bar for displacement perpendicular to the direction of movement of the yarn and to the bar axis.
Claim 10
Dependent Claim
17 words
A system as in claim 1, including means for rotating sad element about said axis of rotation.
Claim 11
Dependent Claim
278 words
A rotatable control system for yarn or like material comprising in combination: an element having an outer cylindrical peripheral surface extending substantially parallel to said element's axis of rotation, said surface being accessible to the yarn to make continuous contact therewith for the length of yarn along the surface, said surface having a number of discrete guide surfaces, at least in part, staggered about an imaginary reference plane which is perpendicular to said axis of rotation of said element, alternate ones of said number of said discrete guide surfaces providing a first set of such surfaces each of which bend only in a first direction relative to said reference plane, and the intervening ones of said guide surfaces providing a second set of said surfaces, each of which bends only in the opposite direction to said first direction, the divergence of adjacent surfaces relative to said reference plane increasing with increasing distance from said axis of rotation to define, for the material, a zig-zag path which degenerates with increasing distance from said axis of rotation of said element into a line path lying in said reference plane of said element; and control means for varying the distance of the yarn from said element axis of rotation to thereby vary the tension applied by said element as it is rotated including: a guide member pivoted on one end, and means for guiding said yarn after leaving said control element attached to the other end of said guide member so that the position of said guidance means and member vary as a function of the tension in said yarn to vary the distance between the yarn and said element axis.
Claim 12
Dependent Claim
278 words
A rotatable control system for yarn or like material comprising in combination: an element having an outer cylindrical peripheral surface extending substantially parallel to said element's axis of rotation, said surface being accessible to the yarn to make continuous contact therewith for the length of yarn along the surface, said surface having a number of discrete guide surfaces, at least in part, staggered about an imaginary reference plane which is perpendicular to said axis of rotation of said element, alternate ones of said number of said discrete guide surfaces providing a first set of such surfaces each of which bend only in a first direction relative to said reference plane, and the intervening ones of said guide surfaces providing a second set of said surfaces, each of which bends only in the opposite direction to said first direction, the divergence of adjacent surfaces relative to said reference plane increasing with increasing distance from said axis of rotation to define, for the material, a zig-zag path which degenerates with increasing distance from said axis of rotation of said element into a line path lying in said reference plane of said element; and control means for varying the distance of the yarn from said element axis of rotation to thereby vary the tension applied by said element as it is rotated including: a guide member pivoted on one end, and means for guiding said yarn after leaving said control element attached to the other end of said guide member so that the position of said guidance means and member vary as a function of the tension in said yarn to vary the distance between the yarn and said element axis.
References Cited (Backward Citations)
US2595270A
Cited
US2945636A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1980-11-14 | 1981-05-16 | 1981-11-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-11-14 | 1985-05-16 | 1985-11-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-11-14 | 1989-05-16 | 1989-11-15 | $7700.00 | Window Closed / Lapsed |