Patent US4791967A successfully refreshed from Google Patents.
US4791967A
Expired / Lapsed
US
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Device for determining the location of a warp break thread in weaving looms using drop wires
Assignee: Picanol NV
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Filing: 1987-02-13
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Granted: 1988-12-20
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Expires: 2007-02-13
Abstract
Abstract An apparatus for determining the location of a warp thread break in weaving looms using drop wires, including detection devices 6 to identify warp thread breaks, movable drop wire locators 7 to determine the warp thread break locations, switching devices 8 arranged to actuate the drop wire locators 7, causing the drop wire locators to move until a fallen drop wire is encountered, and indicators on the drop wire locators to indicate the position of the drop wire locator along the warp threads.
Inventors
- 👤 Michel Vandeweghe
- 👤 Dirk Gryson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 03:16
CPC Classifications
D; D03; D03D; D03D51/00; D03D51/18; D03D51/20; D03D51/28; D03D51/30
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
122 words
An apparatus for electrically detecting and locating a broken warp thread in a weaving loom including a plurality of drop wires arranged to be associated with the warp threads of a loom so that, upon loss of tension in a warp thread due to breakage a drop wire drops from a normal high to a low position, comprising: means for generating a broken warp electrical signal when a drop wire drops to a low position; a movable drop wire locator arranged to traverse a locator path adjacent said drop wires; means for moving said locator along its locator path in response to said broken warp electrical signal; means associated with the locator for detecting and indicating the position of the drop wire.
Claim 2
Independent Claim
122 words
An apparatus for electrically detecting and locating a broken warp thread in a weaving loom including a plurality of drop wires arranged to be associated with the warp threads of a loom so that, upon loss of tension in a warp thread due to breakage a drop wire drops from a normal high to a low position, comprising: means for generating a broken warp electrical signal when a drop wire drops to a low position; a movable drop wire locator arranged to traverse a locator path adjacent said drop wires; means for moving said locator along its locator path in response to said broken warp electrical signal; means associated with the locator for detecting and indicating the position of the drop wire.
Claim 3
Dependent Claim
27 words
The apparatus as claimed in claim 1, including means for stopping the motion of the locator upon its reaching a position correlated with the drop wire position.
Claim 4
Dependent Claim
28 words
The apparatus as claimed in claim 2, wherein said locator is arranged to traverse a locator path beneath the drop wires and extending transversely of the warp threads.
Claim 5
Dependent Claim
55 words
The apparatus as claimed in claim 2, said means for detecting the position of the drop wire including an electrical sensing means for generating a dropped wire location signal; said means for stopping the motion of the locator arranged to receive said dropped wire location signal and to stop the locator motion in response thereto.
Claim 6
Dependent Claim
21 words
The apparatus as claimed in claim 2, wherein said means for indicating the dropped wire position is disposed on the locator.
Claim 7
Dependent Claim
15 words
The apparatus as claimed in claim 5, wherein the indicating means comprises a signal lamp.
Claim 8
Dependent Claim
16 words
The apparatus as claimed in claim 5, wherein the indicating means comprises a visible position marker.
Claim 9
Dependent Claim
47 words
The apparatus as claimed in claim 7, wherein the marker is arranged to be moved from a normal low position beneath the warp thread plane to a marking position above the warp thread plane when the locator motion stops in response to detecting a dropped wire position.
Claim 10
Dependent Claim
32 words
The apparatus as claimed in claim 8, said indicating means including means for raising the dropped wire upwardly above its normal high position upon the stopping of the motion of the locator.
Claim 11
Dependent Claim
25 words
The apparatus as claimed in claim 9, including means for spreading apart dropped wires adjacent to the dropped wire upon raising of the dropped wire.
Claim 12
Dependent Claim
34 words
The apparatus as claimed in claim 2, wherein said means for moving the locator comprises an electrical actuator; said means for stopping the locator motion comprising switch means for interrupting energization of said actuator.
Claim 13
Dependent Claim
26 words
The apparatus as claimed in claim 11, said switch means comprising a proximity switch located on the locator and actuated by contact with a dropped wire.
Claim 14
Dependent Claim
32 words
The apparatus as claimed in claim 11, said switch means comprising an optical sensor mounted on the locator and actuated in response to optical detection of the presence of a dropped wire.
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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) | 1991-12-20 | 1992-06-20 | 1992-12-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-12-20 | 1996-06-20 | 1996-12-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-12-20 | 2000-06-20 | 2000-12-20 | $7700.00 | Window Closed / Lapsed |