US4250931A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Guide for a weft-picking means
Assignee: Sulzer AG
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Filing: 1979-03-01
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Granted: 1981-02-17
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Expires: 1999-03-01
Abstract
Abstract The transducer for sensing the position of a weft picking means in the picking path is mounted in a recess of one of the guide teeth guiding the picking means. The transducer is a piezo-electroacoustic transducer. The transducer may also be mounted on an exterior surface of the guide tooth and may be of a different type, e.g. a strain gauge. Other transducers can be mounted on other guide teeth to control different machine operations.
Inventors
- 👤 Klaus P. Zeleny
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 16:07
CPC Classifications
D; D03; D03D; D03D51/00; D03D51/18; D03D51/40; D03D47/00; D03D47/12; D03D47/24
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
46 words
In a weaving machine having a plurality of guide teeth for guiding a projectile in a picking path, a transducer mounted on at least one of said guide teeth for generating a signal in dependence on the movement of the projectile through said one guide tooth.
Claim 2
Dependent Claim
46 words
In a weaving machine having a plurality of guide teeth for guiding a projectile in a picking path, a transducer mounted on at least one of said guide teeth for generating a signal in dependence on the movement of the projectile through said one guide tooth.
Claim 3
Dependent Claim
25 words
In a weaving machine as set forth in claim 1, said transducer being a piezo-electroacoustic transducer disposed in a recess in said one guide tooth.
Claim 4
Dependent Claim
35 words
In a weaving machine as set forth in claim 2 wherein said transducer includes a piezo-electric element of rod form having electrodes disposed on two opposite sides, said element being mechanically excitable by sound waves.
Claim 5
Dependent Claim
28 words
In a weaving machine as set forth in claim 3, an amplifier and a pair of leads, each said lead extending from a respective electrode to said amplifier.
Claim 6
Dependent Claim
16 words
In a weaving machine as set forth in claim 1, said transducer being a strain gauge.
Claim 7
Dependent Claim
36 words
In a weaving machine as set forth in claim 1 wherein said transducer is responsive to sound waves produced by the travelling projectile to generate an electrical voltage proportional to the amplitude of the sound waves.
Claim 8
Dependent Claim
17 words
In a weaving machine as set forth in claim 6 wherein said transducer is a piezo-electroacoustic transducer.
Claim 9
Dependent Claim
56 words
In a weaving machine as set forth in claim 1 wherein said transducer is a piezo-electroacoustic transducer consisting of a piezo-electric element having two electrodes thereon, said element being mechanically excitable by sound waves produced by a travlling projectile in said picking path to generate an electrical voltage proportional to the amplitude of the sound waves.
Claim 10
Dependent Claim
51 words
A guide for a weft-picking means comprising a plurality of guide teeth for guiding a picking means in a picking path, and a transducer mounted on at least one of said guide teeth for generating a signal in dependence on the movement of the weft-picking means through said one guide tooth.
Claim 11
Dependent Claim
51 words
A guide for a weft-picking means comprising a plurality of guide teeth for guiding a picking means in a picking path, and a transducer mounted on at least one of said guide teeth for generating a signal in dependence on the movement of the weft-picking means through said one guide tooth.
Claim 12
Dependent Claim
55 words
A guide as set forth in claim 9 wherein said transducer is a piezo-electroacoustic transducer consisting of a piezo-electric element having two electrodes thereon, said element being mechanically excitable by sound waves produced by a travelling picking means in said picking path to generate an electrical voltage proportional to the amplitude of the sound waves.
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) | 1984-02-17 | 1984-08-18 | 1985-02-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-02-17 | 1988-08-18 | 1989-02-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-02-17 | 1992-08-18 | 1993-02-17 | $7700.00 | Window Closed / Lapsed |