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US3826073A
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US
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Rotatable sliding-thread clamp for textile machines
Assignee: Rieter Ingolstadt GmbH
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Filing: 1972-03-20
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Granted: 1974-07-30
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Expires: 1992-03-20
Abstract
Abstract Thread or yarn extending through a pair of thread guides is automatically released and subsequently automatically slidably clamped against the mouth of a passage through one of such thread guides, which mouth is adjacent to the other thread guide. The two thread guides are normally urged toward each other by a spring to maintain the clamping element in its thread-clamping position. The spring force may be overcome by positive mechanical, hydraulic, or pneumatic displacing devices to create a pressure differential to override the spring force and effect thread-releasing relative displacement of the thread guides. The clamping element may be fixed to one of the thread guides, or it may be a free ball movable into and out of thread-clamping position by gravitational force, by wedging action of cooperating inclined surfaces, or by an air stream as the thread guides are moved toward and away from each other, respectively. The thread guides are mounted for conjoint rotation to create rotation of the clamped thread and thereby impart twist to the thread.
Inventors
- 👤 G Hoeber
- 👤 H Landwehrkamp
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 17:13
CPC Classifications
D; D01; D01H; D01H4/00; D01H4/02
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
135 words
A rotatable sliding-thread clamp including two coaxially aligned thread guides each having a thread-receiving passage therethrough, such passages forming mouths at their openings through the thread guide ends, the adjacent thread guide ends defining a hollow therebetween, resilient means normally urging such thread guides axially toward each other, and a clamping element disposed in the hollow between such thread guide ends, the improvement comprising first control means for relatively moving such thread guides axially away from each other against the force of such resilient means, and second control means for positively moving the clamping element between a clamping position and a position in which the thread passages through both of said thread guides are unobstructed by said clamping element in coordination with the movement of the thread guides toward and away from each other, respectively.
Claim 2
Dependent Claim
135 words
A rotatable sliding-thread clamp including two coaxially aligned thread guides each having a thread-receiving passage therethrough, such passages forming mouths at their openings through the thread guide ends, the adjacent thread guide ends defining a hollow therebetween, resilient means normally urging such thread guides axially toward each other, and a clamping element disposed in the hollow between such thread guide ends, the improvement comprising first control means for relatively moving such thread guides axially away from each other against the force of such resilient means, and second control means for positively moving the clamping element between a clamping position and a position in which the thread passages through both of said thread guides are unobstructed by said clamping element in coordination with the movement of the thread guides toward and away from each other, respectively.
Claim 3
Dependent Claim
30 words
The clamp defined in claim 1, in which the second control means includes a link connecting the clamping element to one of the thread guides for conjoint relative movement therewith.
Claim 4
Dependent Claim
91 words
The clamp defined in claim 1, in which the thread-receiving passages through the thread guides are disposed substantially vertically, the clamping element is a ball, the first control means including means for creating a pressure differential between the hollow defined by the adjacent ends of the thread guides and a fluid receiving chamber connected to a portion of one of the thread guides remote from the hollow, and the second control means including means for momentarily connecting said chamber with the hollow to provide a fluid stream impingeable on said ball.
Claim 5
Dependent Claim
87 words
The clamp defined in claim 1, in which the thread guides are disposed one above the other, and the thread-receiving passages are disposed substantially vertically, the lower thread guide having an upper inclined surface through which a mouth of the thread-receiving passage through such guide opens, and the upper thread guide having a lower surface through which a mouth of the thread-receiving passage through such guiDe opens, having a conical depression, the axis of said depression being perpendicular to said inclined surface of the lower thread guide.
Claim 6
Dependent Claim
80 words
The clamp defined in claim 1, in which the thread-receiving passage through each thread guide includes a first passage portion remote from the clamping element extending axially of its thread guide and a second passage portion having its axis inclined at an acute angle to the axis of its thread guide, the mouths of the inclined passage portions opening into the hollow between the thread guides and being offset from their respective thread guide axes and being in substantial alignment.
Claim 7
Dependent Claim
33 words
The clamp defined in claim 1, the first control means including pneumatic means for effecting relative axial movement of the thread guides away from each other against the force of the resilient means.
Claim 8
Dependent Claim
92 words
The clamp defined in claim 1, further comprising a sleeve, mounting means rigidly connecting one thread guide in said sleeve, means connecting the other thread guide with said sleeve for axial movement relative to said sleeve and said one thread guide and for conjoint rotation with said one thread guide and said sleeve, a first fluid-receiving chamber externally of the sleeve, a second fluid-receiving chamber between one thread guide means and the sleeve, means connecting said first and second fluid-receiving chambers, and means for altering the pressure of fluid in said chambers.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-07-29 | 1978-01-28 | 1978-07-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-07-29 | 1982-01-28 | 1982-07-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-07-29 | 1986-01-28 | 1986-07-30 | $7700.00 | Window Closed / Lapsed |