US3880001A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Yarn tension or break monitoring apparatus
Assignee: EIDP Inc
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Filing: 1974-03-25
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Granted: 1975-04-29
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Expires: 1994-03-25
Abstract
Abstract A bifunctional stop motion device to detect either tension surges or broken yarn as the yarn is being forwarded in a path of travel from a source to a machine. The device includes a yarn guiding pulley on a counterbalanced arm arranged to pivot for high yarn tension so that it changes the yarn path to cause a conventional feeler riding on the yarn to rotate and actuate a stop motion device shutting down the machine.
Inventors
- 👤 Edward Merrick Hogan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 10:57
CPC Classifications
G; G01; G01L; G01L5/00; G01L5/04; G01L5/047; B; B65; B65H; B65H63/00; B65H63/02; B65H63/024; B65H63/028; B65H2701/00; B65H2701/30; B65H2701/31
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
118 words
An apparatus to detect a variation in tension or a break in yarn being forwarded under tension in a path, said apparatus comprising: a body member located adjacent said path; a first pulley around which said yarn passes rotatably mounted to said body member, an arm mounted to said body member at a location spaced from said first pulley; means for biasing said arm against said tension; a second pulley around which said yarn passes rotatably mounted to said arm for swinging movement with said arm toward and away from said path; and means engaging said yarn intermediate said first and second pulleys for detecting when the yarn moves more than a predetermined distance away from saiD path.
Claim 2
Independent Claim
118 words
An apparatus to detect a variation in tension or a break in yarn being forwarded under tension in a path, said apparatus comprising: a body member located adjacent said path; a first pulley around which said yarn passes rotatably mounted to said body member, an arm mounted to said body member at a location spaced from said first pulley; means for biasing said arm against said tension; a second pulley around which said yarn passes rotatably mounted to said arm for swinging movement with said arm toward and away from said path; and means engaging said yarn intermediate said first and second pulleys for detecting when the yarn moves more than a predetermined distance away from saiD path.
Claim 3
Independent Claim
122 words
An apparatus to detect a variation in tension or a break in yarn being forwarded under tension in a path, said apparatus comprising: a body member located adjacent said path; a first pulley around which said yarn passes rotatably mounted to said body member, an arm pivotally mounted intermediate its ends to said body member at a location spaced from said first pulley; means for biasing said arm against said tension; a second pulley around which said yarn passes rotatably mounted to said arm for swinging movement with said arm toward and away from said path; and means engaging said yarn intermediate said first and second pulleys for detecting when the yarn moves more than a predetermined distance away from said path.
Claim 4
Independent Claim
122 words
An apparatus to detect a variation in tension or a break in yarn being forwarded under tension in a path, said apparatus comprising: a body member located adjacent said path; a first pulley around which said yarn passes rotatably mounted to said body member, an arm pivotally mounted intermediate its ends to said body member at a location spaced from said first pulley; means for biasing said arm against said tension; a second pulley around which said yarn passes rotatably mounted to said arm for swinging movement with said arm toward and away from said path; and means engaging said yarn intermediate said first and second pulleys for detecting when the yarn moves more than a predetermined distance away from said path.
Claim 5
Dependent Claim
28 words
The apparatus as defined in claim 2, including a third pulley coaxially mounted with said first pulley around which said yarn passes after it leaves said second pulley.
Claim 6
Dependent Claim
21 words
The apparatus as defined in claim 2, said means for biasing comprising a counterweight attached to one end of said arm.
Claim 7
Dependent Claim
16 words
The apparatus as defined in claim 2, said variation in tension being an increase in tension.
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) | 1978-04-28 | 1978-10-28 | 1979-04-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-04-28 | 1982-10-28 | 1983-04-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-04-28 | 1986-10-28 | 1987-04-29 | $7700.00 | Window Closed / Lapsed |