US1822696A - Let-off mechanism for novelty fabric looms - Google Patents
Let-off mechanism for novelty fabric looms Download PDFInfo
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- US1822696A US1822696A US416259A US41625929A US1822696A US 1822696 A US1822696 A US 1822696A US 416259 A US416259 A US 416259A US 41625929 A US41625929 A US 41625929A US 1822696 A US1822696 A US 1822696A
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- threads
- warp
- wheel
- lever
- machine
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- D—TEXTILES; PAPER
- D03—WEAVING
- D03D—WOVEN FABRICS; METHODS OF WEAVING; LOOMS
- D03D49/00—Details or constructional features not specially adapted for looms of a particular type
- D03D49/04—Control of the tension in warp or cloth
- D03D49/06—Warp let-off mechanisms
Definitions
- This invention relates to let-off mechanisms for looms and particularly in the weaving of what are known as novelty fabrics, and particularly for velvet pile weaves of plain or fancy designs or a combination of plain and fancy designs; and the object of the invention is to provide a mechanism of the class specified which may be built into and constitute a part of a loom of conventional design, said mechanism having means for controlling and regulating the discharge of the warp threads and for regulating the tension of said threads as fed to the weaving machine in such manner as to compensate for both plain and fancy design fabrics; a further object being to provide means for intermittently feeding the warp threads from the warp beam, said means involving a friction roller and means for aug -tomatically stopping the feed of the warp thread when the slackening loop of said thread becomes relatively large; a further objectbeing to provide means for straightening a cluster of warp threads prior to their transmission to the weaving machine; and with these and other objects in view, the invention consists in a mechanism of the class and for the purpose specified which is simple in construction,
- Fig. 1 is a diagrammatic view illustrating the several parts of my improved mechanism and indicating the use thereof;
- Fig. 2. is a detail plan view of a part of the construction shown in Fig. 1.
- a frame which may be attached to or constitute a part of the framework of the weav ing machine and supported in suitable bearings 6 in said frame is a transverse shaft 7 on which is mounted a friction drive drum 8 having a rubber or other friction facing 8a.
- a pick wheel 9 inwardly of which is arranged a brake wheel 10 around which passes a strap or belt 11 attached to the frame 5 as seen at 12 and from the free end of which 'is supported a plurality of weights 13.
- the frame 5 or the bearings 6 thereon include upwardly directed guide rails 14 upon which the projecting ends of a shaft 15 of a warp beam 16 is adapted to rest in supporting the warp threads 17 Wound on said beam upon the surface of the friction drive drum 8 in the manner clearly seen in Fig. 1.
- Straps 18 are employed in conjunction with the guide rails ll to prevent accidental displacement of the beam, and the upper ends of said rails arenotched as seen at 19 .to support the beam out of engagement with the drum 8'whenever desired. 7
- a lever 22 Pivoted to a downwardly directed extension 20 on the frame 5 as seen at 21 is a lever 22 to the free end of which is connected a link 23 which also connects with the jack of the dobby of the weaving machine so that intermittent movement is transmitted to the lever to move a pawl 24 adjust-ably pivoted to the lever as seen at 25 and normally in engagement with the teeth of the pick wheel 9 to impart intermittent rotary movement to said wheel.
- the pawl 24 is normally held in engagement with the wheel 9 by means of a weight 26 adjustably supported on an arm 27 constituting part of the pawl 24. It will be understood that a relatively large number of threads are taken off from the beam and these threads may be handled singly or in multiple as may be desired.
- the threads are passed over a bar 28 and then around cross rods 29 and over another bar 30 constituting part of a. straightening device 31 which is held stationary in this particular use of the invention with the bar 30 arranged in the position seen in Fig. 1.
- the warp threads 17 extend from the bar 30 as seen at 17a to the weaving machine.
- This method of feeding the warp threads is designed primarily for use in the weaving of plain fabrics but when it is desired to weave what are termed novelty fabrics having predetermined designs arranged in the finished prodis passed a cord bBllTBQx-Whld]. passesiaround another pulley on a shaft 41 driven by or in operative connection with arotatable shaft of the machine.
- the straightening device is used primarily whenclusters of .warp threads .are fed through each of, .the eyes .32, three of said clusters being indicated at. 17?) in Fig; 2 of the drawing. Lhaveifound-that there-is a tendency to develop a twist in the clusters of threads and the: device 31 and rods 35 and 36. operate to. unravel thez twisted, threads to permit .them itopbe fed separately to .the machine as indicated at 170 insaid-figure.
- the detector, 43 is movedtothe lefttodisenga-ge the pawl 24-from the pickiwheelz and this operation is performedagainst theweight tension 1.26, thus, stopping the .feed ofthe warp threads from the beam 16 and .allowing the threads to be drawn "into, the .machine by. raising the. rings 32. agair-istr the tension oftheir-weights 341 untilsuch; time as. the detector, .has beeni released. to again permit the. pawl; 24; to move intoengagement .-.wi-th. the pickwheel to permit. the rotation: there- 7 rings 32 as. may be desired.
- creel warp is used primarily in producing fancy designsnwherc the take up variesito an unlimited degreewith respect .to the separate .end or; group of. ends of ,the. warp. lVhile the creel warp-may be used. independently,. it
- warp 17 in producing some designsor forms in the resulting product.
- chines comprising a pick wheehafriction feed drum rotatable .by saidwheeha warp beam, means; for supporting said beam .to rest by gravity upon said-drum, a. lever-in operative engagement with the, jack. of? .the dobby ofthe machine, a .pawl' on said lever and normally lin engagement with said. wheel whereby in themovement of said. lever,:-intermittent. rotary movement. is imparted .to
- said wheel and drum to discharge the. warp threads from, said .beam, and tensional means engaging the threads fed from. said .warp beam.
- A, let-off mechanism for weaningmachines comprising a gpick wheel, a frictionfeed drum: rotatable by said wheel, a warp beam, means for supporting said beam to rest, .by gravity uponsaid idr-um, .a lever: in
- a let-off mechanism for weaving machines comprising a pick wheel, a friction feed drum rotatable by said wheel, a warp beam, means for supporting said beam 'to rest by gravity upon said drum, a lever in operative engagement with the jack of the dobby of the machine, a pawl on said lever and normally in engagement with said wheel whereby in the movement of said lever, intermittent rotary movement is imparted to said wheel and drum to discharge the warp threads from said beam, tensional means engaging the threads fed from said warp beam, said means comprising weighted rings through which the warp threads are adapted to pass to control and regulate the tension of said threads fed into the weaving machine, and a straightening device interposed between said rings and the machine for unraveling twisted threads prior to their transmission into the machine.
- a let-off mechanism for weaving machines comprising a pick wheel, a friction feed drum rotatable by said wheel, a warp beam, means for supporting said beam to rest by gravity upon said drum, a lever in operative engagement with the jack of the dobby of the machine, a pawl on said lever and normally in engagement with said wheel whereby in the movement of said lever, intermittent rotary movement is imparted to said wheel and drum to discharge the warp threads from said beam, tensional means engaging the threads fed from said warp beam, said means comprising weighted rings through which the warp threads areadapted to pass to control and regulate the tension of said threads fed into the weaving machine, a straightening device interposed between said rings and the machine for unraveling twisted threads prior to their transmission into the machine, said straightening device comprising spaced rods rotatable about a fixed axis, and means in operative connection with the machine for rotating said rods.
- a let-off mechanism for weaving machines comprising a pick wheel, a friction feed drum rotatable by said wheel, a warp beam, means for supporting said beam to rest by gravity upon said drum, a lever in operative engagement with the jack of the dobby of the machine, a pawl on said lever and normally in engagement with said wheel whereby in the movement of said lever, intermittent rotary movement is imparted to said wheel and drum to discharge the warp threads from said beam, tensional means engaging the threads fed from said warp beam, and a creel warp from which warp threads are adapted to be fed through said tensional means and into the machine.
- a let-off mechanism for weaving machines comprising a pick wheel, a friction feed drum rotatable by said wheel, a warp beam, means for supporting said beam to rest by gravity upon said drum, a lever in operative engagement with the jack of the dobby of the machine, a pawl on said lever and normally in engagment with said wheel whereby in the movement of said lever, intermittent rotary movement is imparted to said wheel and drum to discharge the warp threads from said beam, tensional means engaging the threads fed from the warp beam to regulate the tension of said threads fed into the weaving machine, and means actuated by the warp threads when in predetermined position for moving and supporting said pawl in inoperative position to momentarily prevent rotation of said drum and beam.
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- Engineering & Computer Science (AREA)
- Textile Engineering (AREA)
- Looms (AREA)
Description
Patented Sept. 8 1931 PATENT OFFICE JOACHIM GIARDINO, OF WEST NEW YORK, NEW JERSEY LET-OFF MECHANISM FOR NOVELTY FABRIC LOOMS Application filed December 24, 1929. Serial No. 416,259.
This invention relates to let-off mechanisms for looms and particularly in the weaving of what are known as novelty fabrics, and particularly for velvet pile weaves of plain or fancy designs or a combination of plain and fancy designs; and the object of the invention is to provide a mechanism of the class specified which may be built into and constitute a part of a loom of conventional design, said mechanism having means for controlling and regulating the discharge of the warp threads and for regulating the tension of said threads as fed to the weaving machine in such manner as to compensate for both plain and fancy design fabrics; a further object being to provide means for intermittently feeding the warp threads from the warp beam, said means involving a friction roller and means for aug -tomatically stopping the feed of the warp thread when the slackening loop of said thread becomes relatively large; a further objectbeing to provide means for straightening a cluster of warp threads prior to their transmission to the weaving machine; and with these and other objects in view, the invention consists in a mechanism of the class and for the purpose specified which is simple in construction, efficient in use and which is constructed as hereinafter described and claimed.
The invention is fully disclosed in the following specification, of which the accompanying drawing forms a part, in which the 5 separate parts of my improvement are designated by suitable reference characters in each of the views, and in which:
Fig. 1 is a diagrammatic view illustrating the several parts of my improved mechanism and indicating the use thereof; and,
Fig. 2. is a detail plan view of a part of the construction shown in Fig. 1.
In the drawing I have indicated at 5 a frame which may be attached to or constitute a part of the framework of the weav ing machine and supported in suitable bearings 6 in said frame is a transverse shaft 7 on which is mounted a friction drive drum 8 having a rubber or other friction facing 8a.
To one end of the shaft 7 is attached a pick wheel 9 inwardly of which is arranged a brake wheel 10 around which passes a strap or belt 11 attached to the frame 5 as seen at 12 and from the free end of which 'is supported a plurality of weights 13.
The frame 5 or the bearings 6 thereon include upwardly directed guide rails 14 upon which the projecting ends of a shaft 15 of a warp beam 16 is adapted to rest in supporting the warp threads 17 Wound on said beam upon the surface of the friction drive drum 8 in the manner clearly seen in Fig. 1. Straps 18 are employed in conjunction with the guide rails ll to prevent accidental displacement of the beam, and the upper ends of said rails arenotched as seen at 19 .to support the beam out of engagement with the drum 8'whenever desired. 7
Pivoted to a downwardly directed extension 20 on the frame 5 as seen at 21 is a lever 22 to the free end of which is connected a link 23 which also connects with the jack of the dobby of the weaving machine so that intermittent movement is transmitted to the lever to move a pawl 24 adjust-ably pivoted to the lever as seen at 25 and normally in engagement with the teeth of the pick wheel 9 to impart intermittent rotary movement to said wheel. The pawl 24 is normally held in engagement with the wheel 9 by means of a weight 26 adjustably supported on an arm 27 constituting part of the pawl 24. It will be understood that a relatively large number of threads are taken off from the beam and these threads may be handled singly or in multiple as may be desired.
' In one use of the invention, the threads are passed over a bar 28 and then around cross rods 29 and over another bar 30 constituting part of a. straightening device 31 which is held stationary in this particular use of the invention with the bar 30 arranged in the position seen in Fig. 1. The warp threads 17 extend from the bar 30 as seen at 17a to the weaving machine. This method of feeding the warp threads is designed primarily for use in the weaving of plain fabrics but when it is desired to weave what are termed novelty fabrics having predetermined designs arranged in the finished prodis passed a cord bBllTBQx-Whld]. passesiaround another pulley on a shaft 41 driven by or in operative connection with arotatable shaft of the machine.
The straightening device is used primarily whenclusters of .warp threads .are fed through each of, .the eyes .32, three of said clusters being indicated at. 17?) in Fig; 2 of the drawing. Lhaveifound-that there-is a tendency to develop a twist in the clusters of threads and the: device 31 and rods 35 and 36. operate to. unravel thez twisted, threads to permit .them itopbe fed separately to .the machine as indicated at 170 insaid-figure.
.The rotationof .the device 31- .which isin theadirectionw of. .the. arrow: a causes the twisted, threads to. be unraveled by virtue of.,the. intermittent engagement ,of :the rods 35 .and. 36 therewith whichtend to constantly. feed back. inthe. adirection of .the rings 32 the twistedportion of the threads. Mlhile a .portionof. the threads may be twisted intermediate rtlienseparate .rods 35. and 36, the rodv assuming the position. shown to the right ofEigfi. 1, will immediately take up and feed back the. twisted threads as they. are drawn through: said straighteningzdevice andsover said rods, it; .being understood that the rods rotate: about. the, axis 37.
In .thenprocessrof weaving, therseparate threads. or clustersof threads passed through the .seriesof, rings 32 which are provided, will .be extended into loops. of different depths, depending upon .the particular. type of design beingiformedrzin..thefabric, and whenthese. loops become-y extended in .the manner indicated in? full. lines: :in. 1. of thedrawing, ,the threads will engage,v atransverse bar42of a detector :orlautomatic release :device, l3securedto a rocker shaft 44 having an arm:4c5,. the free end-of which is connected with. the pawl,24L-bymeansv of; a linkAG.
.llihen the threads. engage .thmbar 42, .the
detector, 43 is movedtothe lefttodisenga-ge the pawl 24-from the pickiwheelz and this operation is performedagainst theweight tension 1.26, thus, stopping the .feed ofthe warp threads from the beam 16 and .allowing the threads to be drawn "into, the .machine by. raising the. rings 32. agair-istr the tension oftheir-weights 341 untilsuch; time as. the detector, .has beeni released. to again permit the. pawl; 24; to move intoengagement .-.wi-th. the pickwheel to permit. the rotation: there- 7 rings 32 as. may be desired. This creel warp is used primarily in producing fancy designsnwherc the take up variesito an unlimited degreewith respect .to the separate .end or; group of. ends of ,the. warp. lVhile the creel warp-may be used. independently,. it
mayalso-be. used in. conjunction with the.
warp 17 in producing some designsor forms in the resulting product.
- It.-;will be understood. that various types and sizes of pick wheels may be employed in. the. ;mechanism,.. and .to compensate for theedifferent size wheels, the pawl 24 is rendered. adjustable with respect :to. theulever 22. The useoflwheels ofdifferent sizes will govern. the particular type of merchandise being woven, especially with irespectto short piles and higher piles.
ltwill be understood thathw-hile. I have diagrammatically illustrated one formnof mechanism for carrying my :invention into effect, that I amnot: necessarily ,limitedto:
the specific stnictural.v arrangement herein shown and .descr1bed, and. variousv changes therein and modifications thereof 1 maybe made withinathe scope :offlthe. appended claims without departing from the spiritof my invention or. sacrificing its. advantages.
Having fully described my invention, what. 1' claim; as new and .desire .to secure .by Letters Patent, is:
1.. "A. let-off mechanism, for weaving -.ma-.
chines comprising a pick wheehafriction feed drum rotatable .by saidwheeha warp beam, means; for supporting said beam .to rest by gravity upon said-drum, a. lever-in operative engagement with the, jack. of? .the dobby ofthe machine, a .pawl' on said lever and normally lin engagement with said. wheel whereby in themovement of said. lever,:-intermittent. rotary movement. is imparted .to
said wheel and drum to discharge the. warp threads from, said .beam, and tensional means engaging the threads fed from. said .warp beam.
2., A, let-off mechanism for weaningmachines comprising a gpick wheel, a frictionfeed drum: rotatable by said wheel, a warp beam, means for supporting said beam to rest, .by gravity uponsaid idr-um, .a lever: in
operative engagement with the jackof the dobbyof. the machine, a 'pawl on saidlalever and normally in engagement with said wheel whereby in the movement of said lever, intermittent rotary movement is imparted to said wheel and drum to discharge the warp threads from said beam, tensional means engaging the threads fed from said warp beam, and said means comprising weighted rings through which the warp threads are adapted to pass to control and regulate the tension of said threads fed into the weaving machine.
3. A let-off mechanism for weaving machines comprising a pick wheel, a friction feed drum rotatable by said wheel, a warp beam, means for supporting said beam 'to rest by gravity upon said drum, a lever in operative engagement with the jack of the dobby of the machine, a pawl on said lever and normally in engagement with said wheel whereby in the movement of said lever, intermittent rotary movement is imparted to said wheel and drum to discharge the warp threads from said beam, tensional means engaging the threads fed from said warp beam, said means comprising weighted rings through which the warp threads are adapted to pass to control and regulate the tension of said threads fed into the weaving machine, and a straightening device interposed between said rings and the machine for unraveling twisted threads prior to their transmission into the machine.
4. A let-off mechanism for weaving machines comprising a pick wheel, a friction feed drum rotatable by said wheel, a warp beam, means for supporting said beam to rest by gravity upon said drum, a lever in operative engagement with the jack of the dobby of the machine, a pawl on said lever and normally in engagement with said wheel whereby in the movement of said lever, intermittent rotary movement is imparted to said wheel and drum to discharge the warp threads from said beam, tensional means engaging the threads fed from said warp beam, said means comprising weighted rings through which the warp threads areadapted to pass to control and regulate the tension of said threads fed into the weaving machine, a straightening device interposed between said rings and the machine for unraveling twisted threads prior to their transmission into the machine, said straightening device comprising spaced rods rotatable about a fixed axis, and means in operative connection with the machine for rotating said rods.
5. A let-off mechanism for weaving machines comprising a pick wheel, a friction feed drum rotatable by said wheel, a warp beam, means for supporting said beam to rest by gravity upon said drum, a lever in operative engagement with the jack of the dobby of the machine, a pawl on said lever and normally in engagement with said wheel whereby in the movement of said lever, intermittent rotary movement is imparted to said wheel and drum to discharge the warp threads from said beam, tensional means engaging the threads fed from said warp beam, and a creel warp from which warp threads are adapted to be fed through said tensional means and into the machine.
6. A let-off mechanism for weaving machines comprising a pick wheel, a friction feed drum rotatable by said wheel, a warp beam, means for supporting said beam to rest by gravity upon said drum, a lever in operative engagement with the jack of the dobby of the machine, a pawl on said lever and normally in engagment with said wheel whereby in the movement of said lever, intermittent rotary movement is imparted to said wheel and drum to discharge the warp threads from said beam, tensional means engaging the threads fed from the warp beam to regulate the tension of said threads fed into the weaving machine, and means actuated by the warp threads when in predetermined position for moving and supporting said pawl in inoperative position to momentarily prevent rotation of said drum and beam.
In testimony that I claim the foregoing as my invention I have signed my name this 20th day of December, 1929. I
J OACHIM GIARDINO.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US416259A US1822696A (en) | 1929-12-24 | 1929-12-24 | Let-off mechanism for novelty fabric looms |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US416259A US1822696A (en) | 1929-12-24 | 1929-12-24 | Let-off mechanism for novelty fabric looms |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| US1822696A true US1822696A (en) | 1931-09-08 |
Family
ID=23649238
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| US416259A Expired - Lifetime US1822696A (en) | 1929-12-24 | 1929-12-24 | Let-off mechanism for novelty fabric looms |
Country Status (1)
| Country | Link |
|---|---|
| US (1) | US1822696A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2475059A (en) * | 1949-07-05 | Warp tension control for looms |
-
1929
- 1929-12-24 US US416259A patent/US1822696A/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2475059A (en) * | 1949-07-05 | Warp tension control for looms |
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