Patent US3731712A successfully refreshed from Google Patents.
US3731712A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Weft distributor and selector for power looms
Assignee: Ateliers Diederichs SA
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Filing: 1971-07-06
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Granted: 1973-05-08
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Expires: 1991-07-06
Abstract
Abstract In a power loom a distributor-selector device for selecting multi-color wefts among a plurality of weft threads and presenting the selected weft thread to the insertion member. Each weft thread is engaged permanently in a guide independent of the guides receiving the other threads, all the guides being mounted in side by side relationship and adapted to oscillate about a common shaft, the oscillation of the selected guide resulting from the movement of a pull rod to which it is connected and which is adapted, when selected, to become locked to a blade to which a rectilinear reciprocating motion is imparted. The thread movement caused by the oscillation of its guide is completed by the downward pivotal movement of a fork bending said thread across the path of the insertion member. The selected pull rod is lifted by the thrust exerted directly against it by the core of an electromagnet so as to cause its locking engagement with said blade controlling the pull rod, this locking engagement being obtained by using a pivoted catch formed with a notch and responsive to a return spring.
Inventors
- 👤 J Sermet
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 01:45
CPC Classifications
D; D03; D03D; D03D47/00
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
204 words
A selector device for a multicolor power loom of the type wherein each of a plurality of thread guide means engages one weft thread of a certain color, for cyclic movements of engaged threads between a distribution position thereof, where a fork moves to engage such a thread and to place it across the path of movement of a member for insertion of the thread into the fabric, and a non-distribution position; said selector device comprising: a plurality of pull rods in side by side relationship, each having one end connected to one of the thread guide means to move said means between said positions thereof; a plurality of electromagnets, each energizable to lift the opposite end of one of the pull rods; blade means extending across the pull rods and shiftable along the pull rods in synchronism with the movements of the fork and of the member for insertion; and a catch on each pull rod, betWeen said ends, with spring means to lock the catch of a pull rod lifted by its electromagnet onto said blade means, to cause the latter to shift that pull rod and thereby to effect the movements of the corresponding thread guide means between said positions thereof.
Claim 2
Dependent Claim
204 words
A selector device for a multicolor power loom of the type wherein each of a plurality of thread guide means engages one weft thread of a certain color, for cyclic movements of engaged threads between a distribution position thereof, where a fork moves to engage such a thread and to place it across the path of movement of a member for insertion of the thread into the fabric, and a non-distribution position; said selector device comprising: a plurality of pull rods in side by side relationship, each having one end connected to one of the thread guide means to move said means between said positions thereof; a plurality of electromagnets, each energizable to lift the opposite end of one of the pull rods; blade means extending across the pull rods and shiftable along the pull rods in synchronism with the movements of the fork and of the member for insertion; and a catch on each pull rod, betWeen said ends, with spring means to lock the catch of a pull rod lifted by its electromagnet onto said blade means, to cause the latter to shift that pull rod and thereby to effect the movements of the corresponding thread guide means between said positions thereof.
Claim 3
Dependent Claim
231 words
A selector device for a multicolor power loom of the type wherein each of a plurality of thread guide means engages one weft thread of a certain color, for cyclic movements of engaged threads between a distribution position thereof, where a fork moves to engage such a thread and to place it across the path of movement of a member for insertion of the thread into the fabric and a non-distribution position; said selector device comprising: a plurality of pull rods in side by side relationship, each having one end connected to one of the thread guide means to move said means between said positions thereof; a plurality of electromagnets, each energizable to lift the opposite end of one of the pull rods; blade means extending above and across the pull rods and shiftable along the pull rods in synchronism with the movements of the fork and of the member for insertion; fixed support means extending below and across the pull rods for locking all pull rods, except one lifted by its electromagnet, against shifting by the blade; and a catch on each pull rod, between said ends, with means to lock the catch of a pull rod lifted by its electromagnet onto said blade means, to cause the latter to shift that pull rod and thereby to effect the movements of the corresponding thread guide means between said positions thereof.
Claim 4
Dependent Claim
231 words
A selector device for a multicolor power loom of the type wherein each of a plurality of thread guide means engages one weft thread of a certain color, for cyclic movements of engaged threads between a distribution position thereof, where a fork moves to engage such a thread and to place it across the path of movement of a member for insertion of the thread into the fabric and a non-distribution position; said selector device comprising: a plurality of pull rods in side by side relationship, each having one end connected to one of the thread guide means to move said means between said positions thereof; a plurality of electromagnets, each energizable to lift the opposite end of one of the pull rods; blade means extending above and across the pull rods and shiftable along the pull rods in synchronism with the movements of the fork and of the member for insertion; fixed support means extending below and across the pull rods for locking all pull rods, except one lifted by its electromagnet, against shifting by the blade; and a catch on each pull rod, between said ends, with means to lock the catch of a pull rod lifted by its electromagnet onto said blade means, to cause the latter to shift that pull rod and thereby to effect the movements of the corresponding thread guide means between said positions thereof.
Claim 5
Dependent Claim
46 words
A selector device according to claim 2, additionally, including means for initiating the movement of said thread guide means away from its distribution position upon the movement of said member for insertion, engaging the thread, to avoid any frictional contact between said thread and said member.
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) | 1976-05-07 | 1976-11-06 | 1977-05-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-05-07 | 1980-11-06 | 1981-05-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-05-07 | 1984-11-06 | 1985-05-08 | $7700.00 | Window Closed / Lapsed |