US3907006A - Apparatus for indicating the breakage of warp threads in a loom - Google Patents
Apparatus for indicating the breakage of warp threads in a loom Download PDFInfo
- Publication number
- US3907006A US3907006A US488794A US48879474A US3907006A US 3907006 A US3907006 A US 3907006A US 488794 A US488794 A US 488794A US 48879474 A US48879474 A US 48879474A US 3907006 A US3907006 A US 3907006A
- Authority
- US
- United States
- Prior art keywords
- bar
- section
- loom
- support bar
- cross
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
Images
Classifications
-
- 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
- D03D51/20—Warp stop motions
- D03D51/28—Warp stop motions electrical
Definitions
- This invention relates to warp I stop motions for looms, i.e. to apparatus for detecting the breakage of warp threads in a loom and for arresting the operation of the loom in consequence thereof.
- the invention relates more particularly to the contact bars in such apparatus by means of which a signal may be produced in the event of a warp thread breakage.
- apparatus for detecting the breakage of warp threads in a loom comprises an electrically conductive first or carrier bar of U-shaped cross-section, an electrically insulating support bar which is housed partly within the carrier bar and which has one longitudinal edge located beyond the free ends of the legs from the bight of the U, and an electrically conductive finder bar mounted on that longitudinal edge of the support bar, no part of the exposed surface of the finder bar being as close to the bight of the U as the free ends of the legs of the U.
- the thickness of the finder bar is not dictated by the need to provide adequate insulation between the carrier bar and the finder bar. Instead, it is only necessary to provide a sufficient vertical spacing between the carrier bar and the finder bar to insure adequate insulation.
- the thicknesses of the finder bar and the support bar, measured in the direction normal to their length and to the legs of the U cross-section of the carrier bar, may be substantially equal.
- the contact bar system Because of the freedom in selecting the thickness of the support and finder bars, it is possible to design the contact bar system to be thin enough to be used with standard drop wires, even if the legs of the carrier bar are made comparatively thick.
- the support bar and finder bar may be mounted for movement together in the direction of their length.
- the contact bar system includes power means arranged to reciprocate the support bar and the finder bar. This makes it easier to locate a broken warp yarn, since the fallen drop wire and those on either side of it will be reciprocated slightly.
- FIG. 1 is a vertical sectional view through the bars of one form of apparatus according to the invention for indicating thebreakage of warp threads in a loom, the bars being shown in conjunction with a drop wire which is seen in fragmentary elevation; and
- FIG. 2 is a fragmentary side elevation shown at a reduced scale of the bars of the embodiment of FIG. 1, in combination with a fragmentary schematic showing of a loom and of means to reciprocate the support and finder bars of FIG. 1.
- metallic carrier bar 1 of U- shaped cross-section is adapted to extend across the width of a loom, and in use is fixed at its ends to the frame 10 of the loom, as indicated at 10 in FIG. 2.
- a support bar 5 which is made of an electricallyinsulating material also extends across the width of the loom, with its lower part between the legs 7 of the cross-section of the carrier bar 1.
- the support bar can be reciprocated transversely of the loom by an electric motor 1] driving through an eccentric or other suitable linkage, which may be of known type.
- a clearance 8 is left between the inside surfaces 6 of the carrier bar 1 and the surfaces of the support bar 5 to allow reciprocation.
- a metallic finder bar 3 which has teeth 2 along its top edge is fixed to the support bar 5 along the top of the latter.
- a tongue and groove joint is formed between the support bar and the finder bar, the sides of the groove being indicated at 4.
- the distance between the finder bar 3 and the carrier bar 1 is nowhere less than the distance d, which may for example be 5 mm.
- Each of the warp yarns of the loom passes through an associated drop wire 13 which is engaged over or surrounds the carrier bar 1, the support bar 5 and the finder bar 3. Consequently, when a warp yarn breaks and the corresponding drop wire 13 has dropped into the chain-dotted position 13a of FIG. 1, the drop wire 13 touches the bar 3 at 21 and the bar 1 at 22, so that an electrical connection is made between the electrical leads 14 and 15. This connection may be employed to stop the loom.
- the finder bar 3 When the finder bar 3 is reciprocated in the direction indicated by a double arrow 19, the drop wire 13 associated with the broken warp will have dropped into the space 23 between two teeth, and will be likewise reciprocated. Consequently, the drop wires which are adjacent to the dropped drop wire and which are hanging on undamaged warp yarns are reciprocated slightly so that the machine attendant can see the position of the broken yarn.
- the support bar 5 has a thickness f no greater than the thickness of the finder bar 3, and so the overall thickness a of the carrier bar 1 can be small even though its legs 7 can have a relatively large thickness [2.
- the bar 1 can therefore have relatively high bending strength, so that the contact bar system is of use for large cloth widths, e.g. of meters or more.
- the relatively large vertical space d between the bars 1 and 3 insures minimal capacitive coupling between the bars 1 and 3; excessive coupling might lead to interference which could cause unnecessary stoppages of the machine when operating on an AC. supply, for example, a 60 Hz. supply. Also, there is no risk of a false electrical connection occurring between the bars 1 and 3 and causing unnecessary stoppages of the machine as might happen if part of the finder bar 3 extended between the legs of the carrier bar 1, and were to become covered with moist fluff.
- Apparatus for indicating the breakage of a warp thread in a loom comprising an electrically conductive bar of U-shaped cross-section extending crosswise of the loom, an electrically insulative support bar extending parallel to and disposed partly within the U-shaped cross-section of said first-named bar, said support bar further extending exteriorly of said cross-section with one longitudinal edge of said support bar being outside said cross-section, and an electrically conductive bar affixed to the support bar along said one longitudinal edge and being in its entirety outside said cross-section.
- Apparatus according to claim 1 wherein said lastnamed conductive bar is provided with teeth, said apparatus further including means to reciprocate the support bar and last-named conductive bar crosswise of the loom.
- Apparatus according to claim 1 in which the support bar and last-named conductive bar have substantially the same thickness in directions transverse of their length and of the legs of said U-shaped crosssection.
Landscapes
- Engineering & Computer Science (AREA)
- Textile Engineering (AREA)
- Looms (AREA)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CH1076373A CH567127A5 (ru) | 1973-07-24 | 1973-07-24 |
Publications (1)
Publication Number | Publication Date |
---|---|
US3907006A true US3907006A (en) | 1975-09-23 |
Family
ID=4366575
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US488794A Expired - Lifetime US3907006A (en) | 1973-07-24 | 1974-07-15 | Apparatus for indicating the breakage of warp threads in a loom |
Country Status (17)
Country | Link |
---|---|
US (1) | US3907006A (ru) |
JP (2) | JPS5048258A (ru) |
AT (1) | AT328992B (ru) |
BE (1) | BE817843A (ru) |
CH (1) | CH567127A5 (ru) |
CS (1) | CS180019B2 (ru) |
DE (1) | DE2340714C3 (ru) |
DK (1) | DK137018B (ru) |
ES (1) | ES427785A1 (ru) |
FR (1) | FR2238786B1 (ru) |
GB (1) | GB1412930A (ru) |
IE (1) | IE39608B1 (ru) |
IT (1) | IT1015639B (ru) |
LU (1) | LU70590A1 (ru) |
NL (1) | NL7407429A (ru) |
SE (1) | SE413197B (ru) |
SU (1) | SU645602A3 (ru) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4321951A (en) * | 1979-04-25 | 1982-03-30 | Sulzer Brothers Ltd. | Warp yarn stop motion |
US5309951A (en) * | 1991-06-13 | 1994-05-10 | Grob & Co. | Contact drop wire for an electric warp stop |
Families Citing this family (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5432346U (ru) * | 1977-08-03 | 1979-03-02 | ||
GB2050104A (en) * | 1979-05-18 | 1980-12-31 | Cons Group | Screen-printing screen and methods of use and manufacture thereof |
DE3146781C1 (de) * | 1981-11-25 | 1983-03-31 | Grob & Co AG, 8810 Horgen, Zürich | Mechanischer Kettfadenwaechter |
JPS62500111A (ja) * | 1984-08-09 | 1987-01-16 | グロブ・アンド・カムパニ−・アクチェンゲゼルシャフト | 織機のワ−プストップモ−ション用コンタクトバ−組立体 |
NL8600372A (nl) * | 1986-02-14 | 1987-09-01 | Picanol Nv | Inrichting voor het bepalen van de plaats van een kettingbreuk bij weefmachines met kettingwachterlamellen. |
NL8602410A (nl) * | 1986-09-24 | 1988-04-18 | Picanol Nv | Werkwijze om het al dan niet aanwezig zijn van aan elkaar gehechte kettingdraden te bepalen en weefmachine die deze werkwijze toepast. |
GB2223511B (en) * | 1988-10-10 | 1992-08-26 | Texipat S A | Apparatus and method for automatically repairing broken warp threads in weaving machines or looms |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2160718A (en) * | 1938-11-09 | 1939-05-30 | Draper Corp | Detector bar |
US2556332A (en) * | 1950-02-17 | 1951-06-12 | Jr Ansel R Meadors | Warp stop mechanism for looms |
US3246091A (en) * | 1962-07-11 | 1966-04-12 | Grob & Co Ag | Electric contact bar for thread stop motions |
US3635258A (en) * | 1970-07-02 | 1972-01-18 | Deering Milliken Res Corp | Stop motion drop wire |
Family Cites Families (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH031657U (ru) * | 1989-05-25 | 1991-01-09 |
-
1973
- 1973-07-24 CH CH1076373A patent/CH567127A5/xx not_active IP Right Cessation
- 1973-08-10 AT AT704773A patent/AT328992B/de not_active IP Right Cessation
- 1973-08-11 DE DE2340714A patent/DE2340714C3/de not_active Expired
-
1974
- 1974-05-21 DK DK276174AA patent/DK137018B/da unknown
- 1974-05-31 NL NL7407429A patent/NL7407429A/xx not_active Application Discontinuation
- 1974-06-18 FR FR7421094A patent/FR2238786B1/fr not_active Expired
- 1974-06-26 JP JP49073192A patent/JPS5048258A/ja active Pending
- 1974-06-28 ES ES427785A patent/ES427785A1/es not_active Expired
- 1974-07-03 IT IT24745/74A patent/IT1015639B/it active
- 1974-07-09 GB GB3038474A patent/GB1412930A/en not_active Expired
- 1974-07-12 SU SU742043370A patent/SU645602A3/ru active
- 1974-07-12 IE IE1481/74A patent/IE39608B1/xx unknown
- 1974-07-15 US US488794A patent/US3907006A/en not_active Expired - Lifetime
- 1974-07-19 BE BE146724A patent/BE817843A/xx not_active IP Right Cessation
- 1974-07-22 SE SE7409518A patent/SE413197B/xx unknown
- 1974-07-23 LU LU70590A patent/LU70590A1/xx unknown
- 1974-07-24 CS CS7400005301A patent/CS180019B2/cs unknown
-
1978
- 1978-10-27 JP JP1978147214U patent/JPS5482153U/ja active Pending
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2160718A (en) * | 1938-11-09 | 1939-05-30 | Draper Corp | Detector bar |
US2556332A (en) * | 1950-02-17 | 1951-06-12 | Jr Ansel R Meadors | Warp stop mechanism for looms |
US3246091A (en) * | 1962-07-11 | 1966-04-12 | Grob & Co Ag | Electric contact bar for thread stop motions |
US3635258A (en) * | 1970-07-02 | 1972-01-18 | Deering Milliken Res Corp | Stop motion drop wire |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4321951A (en) * | 1979-04-25 | 1982-03-30 | Sulzer Brothers Ltd. | Warp yarn stop motion |
US5309951A (en) * | 1991-06-13 | 1994-05-10 | Grob & Co. | Contact drop wire for an electric warp stop |
Also Published As
Publication number | Publication date |
---|---|
SE7409518L (ru) | 1975-01-27 |
AT328992B (de) | 1976-04-26 |
IE39608B1 (en) | 1978-11-22 |
BE817843A (fr) | 1975-01-20 |
CS180019B2 (en) | 1977-12-30 |
GB1412930A (en) | 1975-11-05 |
SU645602A3 (ru) | 1979-01-30 |
CH567127A5 (ru) | 1975-09-30 |
IT1015639B (it) | 1977-05-20 |
JPS5048258A (ru) | 1975-04-30 |
DK137018B (da) | 1978-01-02 |
IE39608L (en) | 1975-01-24 |
DK137018C (ru) | 1978-06-05 |
DE2340714B2 (de) | 1975-05-22 |
FR2238786B1 (ru) | 1977-10-07 |
DE2340714A1 (de) | 1975-02-13 |
FR2238786A1 (ru) | 1975-02-21 |
SE413197B (sv) | 1980-04-28 |
DE2340714C3 (de) | 1976-01-08 |
DK276174A (ru) | 1975-03-03 |
ES427785A1 (es) | 1976-08-01 |
JPS5482153U (ru) | 1979-06-11 |
ATA704773A (de) | 1975-06-15 |
LU70590A1 (ru) | 1974-11-28 |
NL7407429A (nl) | 1975-01-28 |
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