US3853408A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Device for detecting a textile thread carried through a channel
Assignee: Rueti Te Strake BV
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Filing: 1973-05-07
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Granted: 1974-12-10
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Expires: 1993-05-07
Abstract
Abstract A reed beam has mounted thereon a series of reed blades which have, in their beating edges, aligned U-shaped notches forming a transport channel for the weft. A stationary blowing nozzle is in position to project a weft thread through such aligned notches when the reed is retracted. An apparatus for projecting a substantially parallel beam of light is carried by the reed beam and is arranged to project, through the space between at least two adjacent blades at the end of the reed beam remote from said blowing nozzle, a beam of light covering substantially the entire area of a notch. A photoelectric receiver comprising a series of light-sensitive elements is arranged to receive at least a portion of such beam of light that extends substantially across the width of a notch.
Inventors
- 👤 G Kaalverink
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 23:41
CPC Classifications
D; D03; D03D; D03D47/00; D03D47/27; D03D47/277; D03D47/278; D03D51/00; D03D51/18; D03D51/34
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
157 words
In a shuttleless loom having apparatus for detecting the insertion of a weft through the shed, comprising a reed beam having mounted thereon a series of reed blades which have, in their beating edges, aligned U-shaped notches forming a transport channel for the weft, and a stationary blowing nozzle which is in position to project a weft thread through such aligned notches when the reed is retracted, wherein the improvement comprises an apparatus for projecting a substantially parallel beam of light which is carried by the reed beam and is arranged to project, through the space between at least two adjacent blades at the end of the reed beam remote from said blowing nozzle, a beam of light covering substantially the entire area of a notch, and a photoelectric receiver comprising a series of light-sensitive elements arranged to receive at least a portion of such beam of light that extends substantially across the width of a notch.
Claim 2
Dependent Claim
157 words
In a shuttleless loom having apparatus for detecting the insertion of a weft through the shed, comprising a reed beam having mounted thereon a series of reed blades which have, in their beating edges, aligned U-shaped notches forming a transport channel for the weft, and a stationary blowing nozzle which is in position to project a weft thread through such aligned notches when the reed is retracted, wherein the improvement comprises an apparatus for projecting a substantially parallel beam of light which is carried by the reed beam and is arranged to project, through the space between at least two adjacent blades at the end of the reed beam remote from said blowing nozzle, a beam of light covering substantially the entire area of a notch, and a photoelectric receiver comprising a series of light-sensitive elements arranged to receive at least a portion of such beam of light that extends substantially across the width of a notch.
Claim 3
Dependent Claim
25 words
A device according to claim 1, characterized in that the light-sensitive elements are in optical connection with the transport channel through bundles of optical fibres.
Claim 4
Dependent Claim
28 words
A device according to claim 1, characterized in that the light-sensitive components are united in one assembly and are provided directly in the wall of the transport channel.
Claim 5
Dependent Claim
22 words
A device according to claim 2, characterized in that the bundles of optical fibres are provided in the spacings between the blades.
Claim 6
Dependent Claim
21 words
A device according to claim 3, characterized in that the light-sensitive elements are mounted at the open side of the channel.
Claim 7
Dependent Claim
54 words
A device according to claim 1, comprising a device for tensioning the weft at the end of the inserting phase and during the beating up by the reed, characterized in that said device for tensioning the weft is constituted by a blowing nozzle carried by the reed at the end of the transport channel.
Claim 8
Dependent Claim
27 words
A device according to claim 6, characterized in that the blowing nozzle is mounted in a portion of the transport channel extending laterally beyond the weaving shed.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-12-09 | 1978-06-10 | 1978-12-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-12-09 | 1982-06-10 | 1982-12-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-12-09 | 1986-06-10 | 1986-12-10 | $7700.00 | Window Closed / Lapsed |