US3853153A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Device for intermittently supplying measured weft yarn lengths to the weft inserting device of a shuttleless weaving machine
Assignee: Rueti Te Strake BV
•
Filing: 1973-06-28
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Granted: 1974-12-10
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Expires: 1993-06-28
Abstract
Abstract A rotatably mounted measuring roller is adapted to receive a plurality of windings of yarn drawn from a yarn package, and an electric motor of the quick response type has a driving connection with the measuring roller. A control circuit is connected to supply current to drive the motor and is intermittently energized to drive the motor during each weftinsertion period of the weaving machine. A yarn brake is arranged to brake the yarn on the entrance side of the roller, and a continuously energized tensioning injector is arranged to exert tension on the leading end of the yarn tangentially of the roller, and in cooperation with the brake maintains the windings of yarn in constant frictional engagement with the roller.
Inventors
- 👤 Duynhoven A Van
- 👤 G Kaalverink
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 16:08
CPC Classifications
D; D03; D03D; D03D47/00
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
142 words
A device for intermittently supplying measured weft yarn lengths from a stationary yarn package in a shuttleless weaving machine, comprising a rotatably mounted measuring roller adapted to receive a plurality of windings of yarn drawn from the yarn package, an electric motor of the quick response type having a driving connection with the measuring roller, a control circuit which is connected to supply current to drive the motor and which is intermittently energized to drive the motor during each weftinsertion period of the weaving machine, a yarn brake arranged to brake the yarn on the entrance side of the roller, and a continuously energized tensioning injector which is arranged to exert tension on the leading end of the yarn tangentially of the roller, and which in cooperation with the brake maintains the windings of yarn in constant frictional engagement with the roller.
Claim 2
Independent Claim
142 words
A device for intermittently supplying measured weft yarn lengths from a stationary yarn package in a shuttleless weaving machine, comprising a rotatably mounted measuring roller adapted to receive a plurality of windings of yarn drawn from the yarn package, an electric motor of the quick response type having a driving connection with the measuring roller, a control circuit which is connected to supply current to drive the motor and which is intermittently energized to drive the motor during each weftinsertion period of the weaving machine, a yarn brake arranged to brake the yarn on the entrance side of the roller, and a continuously energized tensioning injector which is arranged to exert tension on the leading end of the yarn tangentially of the roller, and which in cooperation with the brake maintains the windings of yarn in constant frictional engagement with the roller.
Claim 3
Dependent Claim
23 words
A device according to claim 1, characterized in that the yarn brake comprises an air injector acting in opposition to the tensioning injector.
Claim 4
Dependent Claim
46 words
A device according to claim 1 for a weaving machine in which the weft inserting device comprises an air blowing nozzle, characterized in that this air blowing nozzle is connected in a continuously energized air supply circuit and at the same time constitutes the tensioning injector.
Claim 5
Dependent Claim
96 words
A device according to claim 1, comprising a tachogenerator driven by the electric motor, an integrator which the output of the tachogenerator is supplied, and which produces an integrated output signal proportional to the number of revolutions made by the motor shaft, and a circuit which compares such integrated output signal with a preset signal proportional to the desired thread length, and produces a control signal as soon as such integrated output signal equals the preset signal, And a motor control device which is actuated by such control signal and which when actuated stops the motor.
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 |