Patent US4123014A successfully refreshed from Google Patents.
US4123014A
Expired / Lapsed
US
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Yarn tension control
Assignee: Milliken Research Corp
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Filing: 1977-11-25
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Granted: 1978-10-31
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Expires: 1997-11-25
Abstract
Abstract A method and apparatus to adjustably control the tension of yarn by the application of a magnetic force on a metallic ball or roller being used to apply a restrictive force on the yarn passing through a tension applying device.
Inventors
- 👤 Robert W. McCullough
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 13:35
CPC Classifications
B; B65; B65H; B65H59/00; B65H59/10; B65H59/20; B65H59/22; B65H2555/00; B65H2555/10; B65H2555/13; B65H2701/00; B65H2701/30; B65H2701/31
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
158 words
A yarn tension control device comprising: an elongated housing, means forming a yarn outlet in said housing, means forming a yarn inlet in said housing, a first eyelet mounted in said yarn inlet in said housing having a first opening therethrough for the passage of yarn, a second eyelet mounted in said yarn outlet having a second opening therethrough having a diameter greater than the diameter of said first opening, a metallic ball freely supported in said housing on said first eyelet for applying a retarding force to a yarn passing through said eyelets, an electro-magnet mounted adjacent to and operably associated with said metallic ball for applying a force to said metallic ball and means adjacent said yarn outlet responsive to the tension on the yarn exiting from said yarn outlet to regulate the current to said electro-magnet to adjust the force of the electro-magnet on said metallic ball and thereby said retarding force on said yarn.
Claim 2
Dependent Claim
158 words
A yarn tension control device comprising: an elongated housing, means forming a yarn outlet in said housing, means forming a yarn inlet in said housing, a first eyelet mounted in said yarn inlet in said housing having a first opening therethrough for the passage of yarn, a second eyelet mounted in said yarn outlet having a second opening therethrough having a diameter greater than the diameter of said first opening, a metallic ball freely supported in said housing on said first eyelet for applying a retarding force to a yarn passing through said eyelets, an electro-magnet mounted adjacent to and operably associated with said metallic ball for applying a force to said metallic ball and means adjacent said yarn outlet responsive to the tension on the yarn exiting from said yarn outlet to regulate the current to said electro-magnet to adjust the force of the electro-magnet on said metallic ball and thereby said retarding force on said yarn.
Claim 3
Dependent Claim
13 words
The tension control device of claim 1 which said electro-magnet telescopes said housing.
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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) | 1981-10-30 | 1982-05-01 | 1982-10-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-10-30 | 1986-05-01 | 1986-10-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-10-30 | 1990-05-01 | 1990-10-31 | $7700.00 | Window Closed / Lapsed |