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US3851680A - Missing pick sensor - Google Patents

Missing pick sensor Download PDF

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Publication number
US3851680A
US3851680A US00334499A US33449973A US3851680A US 3851680 A US3851680 A US 3851680A US 00334499 A US00334499 A US 00334499A US 33449973 A US33449973 A US 33449973A US 3851680 A US3851680 A US 3851680A
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United States
Prior art keywords
missing
pick
wire
loom
warps
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Expired - Lifetime
Application number
US00334499A
Inventor
F Murray
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Uniroyal Goodrich Tire Co
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Uniroyal Inc
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Publication date
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Priority to US00334499A priority Critical patent/US3851680A/en
Priority to CA172,788A priority patent/CA984704A/en
Application granted granted Critical
Publication of US3851680A publication Critical patent/US3851680A/en
Assigned to UNIROYAL TIRE COMPANY, INC., WORLD HEADQUARTERS, MIDDLEBURY, CT. 06749, A CORP. OF NJ reassignment UNIROYAL TIRE COMPANY, INC., WORLD HEADQUARTERS, MIDDLEBURY, CT. 06749, A CORP. OF NJ ASSIGNMENT OF ASSIGNORS INTEREST. Assignors: UNIROYAL, INC., A CORP. OF NJ
Assigned to UNIROYAL GOODRICH TIRE COMPANY THE, A NY. GENERAL PARTNERSHIP reassignment UNIROYAL GOODRICH TIRE COMPANY THE, A NY. GENERAL PARTNERSHIP ASSIGNMENT OF ASSIGNORS INTEREST. Assignors: UNIROYAL TIRE COMPANY, INC., A CORP OF NJ.
Assigned to FIRST NATIONAL BANK OF CHICAGO, THE reassignment FIRST NATIONAL BANK OF CHICAGO, THE SECURITY INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: UNIROYAL GOODRICH TIRE COMPANY, THE
Assigned to UGTC, INC., 600 SOUTH MAIN STREET, AKRON, OH 44397-0001, A DE CORP. reassignment UGTC, INC., 600 SOUTH MAIN STREET, AKRON, OH 44397-0001, A DE CORP. ASSIGNMENT OF ASSIGNORS INTEREST. Assignors: UNIROYAL GOODRICH TIRE COMPANY, THE
Anticipated expiration legal-status Critical
Assigned to UNIROYAL GOODRICH TIRE COMPANY, THE reassignment UNIROYAL GOODRICH TIRE COMPANY, THE CHANGE OF NAME (SEE DOCUMENT FOR DETAILS). EFFECTIVE ON 11/01/1990 Assignors: UGTC, INC.
Assigned to MICHELIN FINANCE (PAYS-BAS) reassignment MICHELIN FINANCE (PAYS-BAS) SECURITY INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: FIRST NATIONAL BANK OF CHICAGO, THE
Assigned to UNIROYAL GOODRICH TIRE COMPANY, THE reassignment UNIROYAL GOODRICH TIRE COMPANY, THE PARTIAL RELEASE Assignors: MICHELIN FINANCE (PAYS-BAS) B.V.
Expired - Lifetime legal-status Critical Current

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    • D—TEXTILES; PAPER
    • D03—WEAVING
    • D03D—WOVEN FABRICS; METHODS OF WEAVING; LOOMS
    • D03D41/00—Looms not otherwise provided for, e.g. for weaving chenille yarn; Details peculiar to these looms
    • D—TEXTILES; PAPER
    • D03—WEAVING
    • D03D—WOVEN FABRICS; METHODS OF WEAVING; LOOMS
    • D03D51/00—Driving, starting, or stopping arrangements; Automatic stop motions
    • D03D51/18—Automatic stop motions
    • D03D51/34—Weft stop motions

Definitions

  • ABSTRACT Assignee: Uniroyal, Inc., New York, NY.
  • One prior apparatus for stopping a loom when a filling pick is missing utilizes a contact strip which makes contact with a conductive head to close a circuit for stopping the loom when a pick is missing.
  • This sensor requires critical positioning of the conductive head adjacent to the warps and it could result in the occurrence of as many as ten missing picks of one-half inch spacing before detection because the positioning must allow for normal vertical warp movement which ranges from one-half inch to one and one-quarter inches.
  • the prior sensor also contains moving parts and is of a more complex construction than is desirable for purposes of reliability.
  • a fault detector for stopping a loom which responds to slack in the fabric to stop the motion of the loom, but this fault detector is not adapted to detect missing picks.
  • a missing pick sensor in apparatus for stopping a loom for weaving fabric having wire warps when a pick is missing, comprises a resilient member attached to the loom and a member of insulating material attached to the resilient member and bearing on woven fabric having wire warps.
  • the apparatus also includes a conductive member supported by the insulating member and extending from the insulating member and positioned over the wire warps near the point of weaving a pick through the wire warps.
  • the apparatus also includes circuit means for conductively coupling the conductive member to a loom stop-motion circuit.
  • the conductive member is so positioned on the insulating member as to be out of contact with the wire warps when no picks are missing and to make contact with the wire warps when a pick is missing, the wire warps forming a portion of the loom stop-motion circuit.
  • FIG. I is a perspective view of a missing pick sensor constructed in accordance with the invention in an operative position on a fabric having wire warps;
  • FIG. 2 is a plan view of the missing pick sensor
  • FIG. 3 is a diagram, partly schematic, of a circuit responsive to the missing pick sensor for stopping the motion of the loom;
  • FIG. 4 is a schematic drawing of the missing pick sensor on a fabric having a filling pick at the proper position
  • FIG. 5 is a schematic view of the missing pick sensor on a fabric missing a filling pick.
  • a missing pick sensor in accordance with the invention comprises a resilient member attached to the loom 11.
  • the member 10 may,
  • the picks 13b of the fabric 13 may be of wire or may be of non-conductive textile material.
  • Theconductive wire 14 may be fastened to the insulating member 12 by suitable nuts and bolts recessed in the insultating member 12.
  • the conductive member 14. is so positioned on the insulating member 12 as to be out of contact with the wire warps when no picks are missing and to make contact with the wire warps when a pick is missing.
  • the wire warps form a portion of a loom stop-motion circuit.
  • the missing pick sensor also includes circuit means comprising, for example, an insulated wire 15 for conductively coupling the conductive member 14 to the loom stop-motion circuit.
  • a loom motor 16 energized by a suitable alternatingcurrent supply has within its housing a transformer having a winding 17 for supplying a suitable alternatingcurrent voltage to a solenoid 18 which is connected to the wire 15 of the sensor.
  • the wire warps of the fabric 13 are schematically represented as being grounded and are, therefore, effectively connected to grounded terminal of the transformer winding 17.
  • the solenoid 18 controls a mechanical pawl which stops the motion of the loom by forcing disengagement of the loom master clutch when the solenoid 18 is energized.
  • the wire 14 on the insulating member 12 is not in contact with the warps of the fabric 13, as represented in FIG. 4.
  • the sensor is so positioned on the loom that as the warps move, for example, one-half inch for insertion of the next pick, the upper system of warps contact the sensor wire 14, thereby closing the loom stopmotion circuit of FIG. 3. Accordingly, the solenoid 18 is energized and the motion of the loom is stopped.
  • the sensor may also be utilized when the weave design has picks which are spaced at less than one-half inch because the missing pick can be detected sufficiently early to prevent the warps from traveling beyond the distance which it is possible to back up the loom, a distance of, for example, 6 inches. For example, if the picks were spaced 1/64 inch apart, more picks would be missing before the first missing pick was detected but the distance the warps would travel would be less than the distance it is possible to back up the loom.
  • a sensor in accordance with claim 1 in which the a conductive member supported by said insulating said conductive member comprises a wire.

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Looms (AREA)

Abstract

A missing pick sensor for apparatus for stopping a loom for weaving wire warps when a pick is missing. The sensor comprises a resilient member attached to the loom and a member of insulating material at one end of the resilient member and bearing on woven fabric having wire warps. A conductive member is supported by the insulating member and extends therefrom and is positioned over the wire warps near the point of weaving a pick through the wire warps. Circuit means is utilized for conductively coupling the conductive member to a loom stop-motion circuit and the conductive member is so positioned on the insulating member as to make contact with the wire warps when a pick is missing to complete the loom stop-motion circuit.

Description

Dec. 3, 1974 United States Patent [19] Murray MISSING PICK SENSOR Primary Examiner-James Kee Chi Attorney, Agent, or FirmCharles A. Blank, Esq.
Inventor: Fletcher A. Murray, West Columbia, SC.
ABSTRACT [73] Assignee: Uniroyal, Inc., New York, NY.
a u I M P S F A Ur Field of Search 139/370, 372, 348, 352
supported by the insulating member and extends therefrom and is positioned over the wire warps near [56] References Cited the point of weaving a pick through the wire warps. UNITED STATES PATENTS Circuit means is utilized for conductively coupling the 0-S- nmW mam .n w .m m C e k .w.m n 0mm n t wh mnunm prwwk oun ts m S m mw w l i r o flm b S c m b m m s eea t v .1 muu wu eceilm im m m e n 0m 0 m at Coo n0 O c. t.mwm 888 8 444 4 BBBWBW 999 9 1.11919 .3 .."l. u .m mm m .e ...ne mm o o b h peaw fl Oh .l.l PSSFSC 289340 344556 999999 HHHHHH 775543 37557 59437 65 940 647373 22222 2 Claims, 5 Drawing Figures sumaorz PATENTEL DEC 3 I974 MISSING PICK SENSOR This invention relates to a missing pick sensor for apparatus for stopping a loom for weaving fabric having wire warps when a pick is missing.
One prior apparatus for stopping a loom when a filling pick is missing utilizes a contact strip which makes contact with a conductive head to close a circuit for stopping the loom when a pick is missing. This sensor requires critical positioning of the conductive head adjacent to the warps and it could result in the occurrence of as many as ten missing picks of one-half inch spacing before detection because the positioning must allow for normal vertical warp movement which ranges from one-half inch to one and one-quarter inches. The prior sensor also contains moving parts and is of a more complex construction than is desirable for purposes of reliability.
A fault detector for stopping a loom is also known which responds to slack in the fabric to stop the motion of the loom, but this fault detector is not adapted to detect missing picks.
It is an object of the present invention, therefore, to provide a new and improved missing pick sensor for apparatus for stopping a loom for weaving fabric having wire warps when a pick is missing which avoids one or more of the disadvantages of prior such apparatus.
It is another object of the invention to provide a new and improved missing pick sensor which has a high degree of reliability in detecting the first missing pick in a wire weaving process.
In accordance with the invention, in apparatus for stopping a loom for weaving fabric having wire warps when a pick is missing, a missing pick sensor comprises a resilient member attached to the loom and a member of insulating material attached to the resilient member and bearing on woven fabric having wire warps. The apparatus also includes a conductive member supported by the insulating member and extending from the insulating member and positioned over the wire warps near the point of weaving a pick through the wire warps. The apparatus also includes circuit means for conductively coupling the conductive member to a loom stop-motion circuit. The conductive member is so positioned on the insulating member as to be out of contact with the wire warps when no picks are missing and to make contact with the wire warps when a pick is missing, the wire warps forming a portion of the loom stop-motion circuit.
Referring now to the drawings:
FIG. I is a perspective view of a missing pick sensor constructed in accordance with the invention in an operative position on a fabric having wire warps;
FIG. 2 is a plan view of the missing pick sensor;
FIG. 3 is a diagram, partly schematic, of a circuit responsive to the missing pick sensor for stopping the motion of the loom;
FIG. 4 is a schematic drawing of the missing pick sensor on a fabric having a filling pick at the proper position; and
FIG. 5 is a schematic view of the missing pick sensor on a fabric missing a filling pick.
Referring now more particularly to FIG. 1, in which the arrow represents the direction of fabric motion, and to FIG. 2 of the drawings, a missing pick sensor in accordance with the invention comprises a resilient member attached to the loom 11. The member 10 may,
for example, be of spring steel. A member 12 of insulating material, for example, nylon, is attached to theresilient member 10 and rides on woven fabric 13 having wire warps 13a. The picks 13b of the fabric 13 may be of wire or may be of non-conductive textile material.
A conductive member 14, preferably comprising a wire, is supported by the insulating member 12 and extends from the insulating member and is positioned over the wire warps near the point of weaving a pick through the wire warps. Theconductive wire 14 may be fastened to the insulating member 12 by suitable nuts and bolts recessed in the insultating member 12.
The conductive member 14. is so positioned on the insulating member 12 as to be out of contact with the wire warps when no picks are missing and to make contact with the wire warps when a pick is missing. As will be described subsequently, the wire warps form a portion of a loom stop-motion circuit. The missing pick sensor also includes circuit means comprising, for example, an insulated wire 15 for conductively coupling the conductive member 14 to the loom stop-motion circuit.
Referring now more particularly to FIGS. 3, 4 and 5, a loom motor 16 energized by a suitable alternatingcurrent supply has within its housing a transformer having a winding 17 for supplying a suitable alternatingcurrent voltage to a solenoid 18 which is connected to the wire 15 of the sensor. In FIG. 3 the wire warps of the fabric 13 are schematically represented as being grounded and are, therefore, effectively connected to grounded terminal of the transformer winding 17. The solenoid 18 controls a mechanical pawl which stops the motion of the loom by forcing disengagement of the loom master clutch when the solenoid 18 is energized.
Referring to FIGS. 4 and 5, in which the arrows represent the direction of fabric motion, when a filling pick is present at its normal location, the wire 14 on the insulating member 12 is not in contact with the warps of the fabric 13, as represented in FIG. 4. However, when a pick is missing the warps are no longer held in place at the position of the wire 14 and separate into an upper and lower system of warps. As represented in FIG. 5, the sensor is so positioned on the loom that as the warps move, for example, one-half inch for insertion of the next pick, the upper system of warps contact the sensor wire 14, thereby closing the loom stopmotion circuit of FIG. 3. Accordingly, the solenoid 18 is energized and the motion of the loom is stopped.
The sensor may also be utilized when the weave design has picks which are spaced at less than one-half inch because the missing pick can be detected sufficiently early to prevent the warps from traveling beyond the distance which it is possible to back up the loom, a distance of, for example, 6 inches. For example, if the picks were spaced 1/64 inch apart, more picks would be missing before the first missing pick was detected but the distance the warps would travel would be less than the distance it is possible to back up the loom.
While there has been described what is at present considered to be the preferred embodiment of this invention, it will be obvious to those skilled in the art that various changes and modifications may be made therein without departing from the invention, and it is, therefore, aimed to cover all such changes and modifi- 3 4 cations as fall within the true spirit and scope of the inber and positioned over the wire warps near the vention. point of weaving a pick through the wire warps;
What is claimed is: and circuit means for conductively coupling said con- 1. In apparatus for stopping a loom for weaving fabric ductive member to a loom stop-motion circuit, said having wire warps when a pick is missing, a missing 5 conductive member being so positioned on said inpick sensor comprising: sulating member as to be out of contact with the a resilient member attached to the loom; wire warps when no picks are missing and to make a member of insulating material attached to said recontact with the wire warps when a pick is missing, 7 silient member and bearing on woven fabric having the wire warps forming a portion of the loom stopwire warps during normal operation of the loom 0 motion circuit. when no picks are missing from the fabric; 2. A sensor in accordance with claim 1 in which the a conductive member supported by said insulating said conductive member comprises a wire.
member and extending from said insulating mem-

Claims (2)

1. In apparatus for stopping a loom for weaving fabric having wire warps when a pick is missing, a missing pick sensor comprising: a resilient member attached to the loom; a member of insulating material attached to said resilient member and bearing on woven fabric having wire warps during normal operation of the loom when no picks are missing from the fabric; a conductive member supported by said insulating member and extending from said insulating member and positioned over the wire warps near the point of weaving a pick through the wire warps; and circuit means for conductively coupling said conductive member to a loom stop-motion circuit, said conductive member being so positioned on said insulating member as to be out of contact with the wire warps when no picks are missing and to make contact with the wire warps when a pick is missing, the wire warps forming a portion of the loom stop-motion circuit.
2. A sensor in accordance with claim 1 in which the said conductive member comprises a wire.
US00334499A 1973-02-21 1973-02-21 Missing pick sensor Expired - Lifetime US3851680A (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
US00334499A US3851680A (en) 1973-02-21 1973-02-21 Missing pick sensor
CA172,788A CA984704A (en) 1973-02-21 1973-05-30 Missing pick sensor

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4049023A (en) * 1976-05-25 1977-09-20 Champion International Corporation Stop motion for narrow width needle looms

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1866053A (en) * 1930-10-25 1932-07-05 John H Pope Thin place detector
US2445697A (en) * 1946-06-10 1948-07-20 Shelton Corp Ab Flaw detector for looms
US2471845A (en) * 1947-02-24 1949-05-31 Ind Rayon Corp Loom stopping means
US2639735A (en) * 1950-02-13 1953-05-26 Nickolas W Fisher Flaw detector for wire mesh looms
US2674277A (en) * 1951-11-23 1954-04-06 George C Moore Company Weft detector for looms
US2930411A (en) * 1958-05-05 1960-03-29 Appleton Wire Works Corp Fault detection apparatus for weaving

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1866053A (en) * 1930-10-25 1932-07-05 John H Pope Thin place detector
US2445697A (en) * 1946-06-10 1948-07-20 Shelton Corp Ab Flaw detector for looms
US2471845A (en) * 1947-02-24 1949-05-31 Ind Rayon Corp Loom stopping means
US2639735A (en) * 1950-02-13 1953-05-26 Nickolas W Fisher Flaw detector for wire mesh looms
US2674277A (en) * 1951-11-23 1954-04-06 George C Moore Company Weft detector for looms
US2930411A (en) * 1958-05-05 1960-03-29 Appleton Wire Works Corp Fault detection apparatus for weaving

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4049023A (en) * 1976-05-25 1977-09-20 Champion International Corporation Stop motion for narrow width needle looms

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Publication number Publication date
CA984704A (en) 1976-03-02

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AS Assignment

Owner name: UNIROYAL TIRE COMPANY, INC., WORLD HEADQUARTERS, M

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST.;ASSIGNOR:UNIROYAL, INC., A CORP. OF NJ;REEL/FRAME:004475/0215

Effective date: 19851025

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Owner name: UNIROYAL GOODRICH TIRE COMPANY THE, 600 SOUTH MAIN

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST.;ASSIGNOR:UNIROYAL TIRE COMPANY, INC., A CORP OF NJ.;REEL/FRAME:004665/0643

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Effective date: 19880623

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Owner name: UGTC, INC., 600 SOUTH MAIN STREET, AKRON, OH 44397

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST.;ASSIGNOR:UNIROYAL GOODRICH TIRE COMPANY, THE;REEL/FRAME:005617/0501

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Free format text: CHANGE OF NAME;ASSIGNOR:UGTC, INC.;REEL/FRAME:006002/0042

Effective date: 19901101

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Owner name: MICHELIN FINANCE (PAYS-BAS)

Free format text: SECURITY INTEREST;ASSIGNOR:FIRST NATIONAL BANK OF CHICAGO, THE;REEL/FRAME:006169/0591

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