Patent US2831964A successfully refreshed from Google Patents.
Patent US3880197A successfully refreshed from Google Patents.
US3880197A
Expired / Lapsed
US
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Method of and apparatus for controlling weft carriers in travelling-shed weaving machines
Assignee: Vyzkumny Ustav Bavlnarsky AS
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Filing: 1973-06-11
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Granted: 1975-04-29
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Expires: 1993-06-11
Abstract
Abstract Method of and apparatus for controlling weft carriers in travelling-shed weaving machines. Resistance to the travel of the carriers during their movement as by an incompletely open shed is monitored by a scanning bar; the scanning bar is connected to a transducer which transmits a signal to a controller for the machine drive to stop the machine.
Inventors
- 👤 Frantisek Bucil
- 👤 Vitezslav Vasek
- 👤 Karel Spatenka
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 16:18
CPC Classifications
D; D03; D03D; D03D51/00; D03D51/18; D03D51/40; D03D47/00; D03D47/12; D03D47/26
Claims Analysis
Total Claims: 23
Claim 1
Independent Claim
90 words
A method of controlling weft carriers which move along a carrier guide in travelling shed weaving machines provided with a machine drive and a controller for said drive, comprising monitoring any increased resistance to travel of the carriers during their operative movement resulting in a deflection of the carrier guide, detecting and converting the deflection of the carrier guide into an electrical signal, and forwarding such signal to the controller of the machine drive to stop the machine when the deflection of the carrier guide exceeds a predetermined desired value.
Claim 2
Independent Claim
90 words
A method of controlling weft carriers which move along a carrier guide in travelling shed weaving machines provided with a machine drive and a controller for said drive, comprising monitoring any increased resistance to travel of the carriers during their operative movement resulting in a deflection of the carrier guide, detecting and converting the deflection of the carrier guide into an electrical signal, and forwarding such signal to the controller of the machine drive to stop the machine when the deflection of the carrier guide exceeds a predetermined desired value.
Claim 3
Dependent Claim
44 words
A method according to claim 1, comprising monitoring the increased resistance to travel of the carriers separately in the following zones of their travel: the entry end zone, the entry transferring zone, the shed zone, the exit transferring zone and the exit end zone.
Claim 4
Dependent Claim
41 words
A method according to claim 1, wherein the carriers move in a horizontal phase, and comprising monitoring the increases resistance to travel of the carriers during their operative movement as a function of the upward vertical deflection of the carrier guide.
Claim 5
Dependent Claim
36 words
A method according to claim 3, wherein the carriers move beneath a scanning bar which serves to guide the carriers, and detecting the vertically upward deflection of the scanning bar by the carriers as they move.
Claim 6
Dependent Claim
79 words
Apparatus for controlling weft carriers in travelling-shed weaving machines, provided with machine drive and a controller for said drive, comprising a guide for the carriers, said guide including a scanning bar along which the carriers travel, means for detecting and converting a deflection of the scanning bar into electrical signal, and means for forwarding such signal to the controller of the machine drive to stop the machine when the deflection of the scanning bar exceeds a predetermined desired value.
Claim 7
Dependent Claim
79 words
Apparatus for controlling weft carriers in travelling-shed weaving machines, provided with machine drive and a controller for said drive, comprising a guide for the carriers, said guide including a scanning bar along which the carriers travel, means for detecting and converting a deflection of the scanning bar into electrical signal, and means for forwarding such signal to the controller of the machine drive to stop the machine when the deflection of the scanning bar exceeds a predetermined desired value.
Claim 8
Dependent Claim
50 words
Apparatus, according to claim 5, wherein the carriers move in a horizontal phase, and comprising an upper guide for the carriers, such guide including a scanning bar beneath which the carriers travel, and means for detecting the vertical force exerted on the scanning bar by the carriers as they move.
Claim 9
Dependent Claim
36 words
Apparatus, according to claim 6, comprising a transducer connected to the scanning bar, upon vertically upward displacement of the scanning bar, said transducer generating said signal which is forwarded to the controller for stopping the machine.
Claim 10
Dependent Claim
28 words
Apparatus, according to claim 7, wherein the transducer is a bellows of variable volume connected to a constant manostat spring-loaded between the scanning bar and the rigid cross-beam.
Claim 11
Dependent Claim
31 words
Apparatus, according to claim 7, comprising elastic members disposed between the scanning bar and the rigid cross-beam, the rigid cross-beam having stops defining the range of movement of the scanning bar.
Claim 12
Dependent Claim
23 words
Apparatus, according to claim 9, wherein the rigid cross-beam carrying the scanning bar is affixed to the draw rod of a lifting mechanism.
Claim 13
Dependent Claim
75 words
Apparatus, according to claim 6, wherein the scanning bar is divided into parts including the following: an entry end scanning bar, an entry transferring scanning bar, a shed scanning bar, an exit transferring bar, and an exit end scanning bar, and comprising a transducer for each of said scanning bars; said transducer being disposed for operation by their respective parts of the scanning bar; the transducers being connected to the controller for stopping the machine.
Claim 14
Dependent Claim
20 words
Apparatus according to claim 11, wherein the adjacent ends of the scanning bars are cut askew of the warp threads.
Claim 15
Dependent Claim
22 words
Apparatus, according to claim 6, wherein the scanning bar is displaceable from its operating position to a non-operating position, and vice versa.
Claim 16
Dependent Claim
42 words
Apparatus, according to claim 11, wherein the entry end scanning bar, the entry transferring bar, the shed scanning bar, the exit transferring bar, and the exit end scanning bar are displaceable from their operating position to a non-operating position, and vice versa.
Claim 17
Dependent Claim
23 words
Apparatus, according to claim 6, wherein the shed scanning bar is divided into independent scanning sections, each sections being displaceable into non-operating position.
Claim 18
Dependent Claim
51 words
Apparatus, according to claim 6, wherein the scanning bar is swingable in the range between stops seated on an arm, the scanning bar being pressed into basic position by a spring, the scanning bar in the scanning position being iN contact with the transducer, such transducer being fixed on the arm.
Claim 19
Dependent Claim
22 words
Apparatus, according to claim 16, wherein the arm is affixed to a rotatable shaft for deflecting the scanning bar into non-operating position.
Claim 20
Dependent Claim
10 words
Apparatus, according to claim 16, wherein the stops are adjustable.
Claim 21
Dependent Claim
31 words
Apparatus, according to claim 6, comprising electrically insulating elastic members aligned between the scanning bar and a rigid cross-beam, and a ribbon-like contact electrode disposed normally spaced from the scanning bar.
Claim 22
Dependent Claim
48 words
Apparatus, according to claim 6, comprising an assembly of a rigid cross-beam to which the scanning bar is secured, and a reinforced beam equipped with contact points, confronting the scanning bar; the reinforced beam being insulated from the cross-beam, the assembly being mounted upon a vertically adjustable support.
Claim 23
Dependent Claim
34 words
Apparatus, according to claim 6, wherein the transducer is a condenser which changes its capacity when the scanning bar is deflected, the condenser having opposed electrodes mounted respectively on the scanning bar and adjustable.
References Cited (Backward Citations)
US3683969A
Cited
US3729029A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-04-28 | 1978-10-28 | 1979-04-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-04-28 | 1982-10-28 | 1983-04-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-04-28 | 1986-10-28 | 1987-04-29 | $7700.00 | Window Closed / Lapsed |