US4098115A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Yarn tension measuring device
Assignee: Bayer AG
•
Filing: 1976-01-14
•
Granted: 1978-07-04
•
Expires: 1996-01-14
Abstract
Abstract Yarn tension measuring device for the measurement of small yarn tensions at high yarn speed consisting of a measuring head with three guide elements comprising air cushioned runners and having very low moments of inertia, which does not at all or only very slightly alter the yarn tension.
Inventors
- 👤 Michael Bueb
- 👤 Edgar Muschelknautz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 17:21
CPC Classifications
G; G01; G01L; G01L5/00; G01L5/04; G01L5/08
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
96 words
A yarn tension measuring device, comprising a measuring head having three guide elements and means for enabling a Sommerfield number of ≦0.5 for yarn travelling at a speed of from 400 - 4000 m/min comprising mounting the guide elements for rotation up to 300,000 r.p.m. with the axes of rotation at the apexes of a triangle, in which a middle guide element is mounted on the force pick-up of an electrical dynamometer working virtually motionlessly and which is arranged in a block, wherein the guide elements comprise air cushioned runners having very low moments of inertia.
Claim 2
Dependent Claim
96 words
A yarn tension measuring device, comprising a measuring head having three guide elements and means for enabling a Sommerfield number of ≦0.5 for yarn travelling at a speed of from 400 - 4000 m/min comprising mounting the guide elements for rotation up to 300,000 r.p.m. with the axes of rotation at the apexes of a triangle, in which a middle guide element is mounted on the force pick-up of an electrical dynamometer working virtually motionlessly and which is arranged in a block, wherein the guide elements comprise air cushioned runners having very low moments of inertia.
Claim 3
Dependent Claim
21 words
A device according to claim 1, wherein the middle guide element is provided with a flexible hose for its air supply.
Claim 4
Dependent Claim
24 words
A device according to claim 1, wherein the middle guide element is provided in its interior with a feed channel for the air supply.
Claim 5
Dependent Claim
18 words
A device according to claim 1, wherein the surfaces of the runners have a low coefficient of friction.
Claim 6
Dependent Claim
13 words
A device according to claim 1, wherein the runners have a cylindrical surface.
Claim 7
Dependent Claim
15 words
A device according to claim 1, wherein the generatrix of the runners is curved inwards.
Claim 8
Dependent Claim
18 words
A device according to claim 1, wherein the runners enclose a space consisting of two abutting truncated cones.
Claim 9
Dependent Claim
19 words
A device according to claim 1, further comprising yarn guides for guiding the yarn onto the air cushioned runners.
Claim 10
Dependent Claim
31 words
A device according to claim 1, wherein the radius of the guide element is in a range around 2 mm for a radial bearing play of between 10 and 50 μm.
Claim 11
Dependent Claim
16 words
A device according to claim 9, wherein the radius of the guide elements is 2 mm.
References Cited (Backward Citations)
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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) | 1981-07-03 | 1982-01-02 | 1982-07-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-07-03 | 1986-01-02 | 1986-07-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-07-03 | 1990-01-02 | 1990-07-04 | $7700.00 | Window Closed / Lapsed |