| Title of Invention | AN AUTOMATIC LOAD RELEASABLE TOP ARM ASSEMBLE FOR TEXTILE DRAFTING MACHINERY |
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| Abstract | This invention relates to an automatic load releasable top arm assembly. It consists of a plurality of top arm provided with pressure cells for exerting load on the top rollers of the assembly. The top. arms are actuatably mounted on pneumatic cylinders. The piston rods of these cylinders terminate in yokes. A pivotable pawl is connected to each of the yokes. The other end of the pawl is engagable with a loading member which interconnects the top arms. When the piston is actuated the pawl engages with the loading member to lower the top arm. Load is thereby exerted on the top rollers and the drafting rollers. When the piston rod is lowered, the pawl disengages firm the loading member to release the top arm and the pressure cells. When the machine is not in operation for more than the predetermined duration, the load on the top rollers are automatically released. Thus the undue load on the drafting elements are avoided. |
| Full Text | This invention relates to an automatic load releasable top arm assembly for textile drafting machinery. Textile sfHnning machines such as roving ginning machines have a set of bottom rollers arranged in the spinning zone. A top arm having a set of top rollers are provided at each location of the bottom rollers. The rollers of the top arm piess against the corresponding bottom rollers when loaded. Drafting of the sliver or roving is influenced by the load of the top arm roltors on the bottom rollers. In other words, the piessure required for the drafting is apf^ed to the fibres through the top rollers. Ccmventicnially, tin loading elements which apply the drafting force on the top roUers are mounted on top arm assembly. The top arm is held at the required position to apply load to the sliver to be drafted. However, when the machine is not in operation for a considerable time, unutilized pressure exerted by the top roller load leads to damage and deformation of drafting rollers and top rollers. According to the existing system, the top roller load is released by manually unlocking the top arm thereby avoiding any possible danuige or deformation. Need for automatically releasing the load of top arm rollers has been felt and is one of the objects of this invmtion. The top arm assembly consisting of two tc^ arms is mounted and positioned cm a pair of pneumatic cylinders. The piston rods of the pneumatic cylinders temminate in an adjustable yoke. A loading pin connects the two arms of the top arm assembly. A pivoted pawl having (me end connected to the yoke and the other end engagable witii the loading pm connects tiie piston rod to each of the top arms. The top arms are provided with a plurality of pressure cylindera for applying predetermined load on top arm rollers which rest over drafting rollers while the machine is being operated. This invention relates to an automatic load releasaUe top arm assemUy which comprises at least a pair of t(^ arms each of said top arm being actuatably mounted on a pneumatic cyUnder, the piston rods of said pneumatic cylinders temminating in yokes, a loading member connecting said top arms, a pair of pivotable pawls, one end of each is connected to said yokes, the other ends being engagable with said loading member, said top arms being provided witii pressure cylinders for exerting load on drafting rollers. The yokes of the piston rod may be adjustable and may be threaded to the piston rod. This invention will now be described with reference to the single figure in the acocMupanying drawings. The top arm of the assemUy is represented by reference numeral 2. The pressure cylinders disposed on the lower side of the top arm is indicated by numeral 1. The top rollers are shown by numeral 10 while the drafting rollers are shown by numeral 11. Pneumatic cylinders are represrated by numeral 3. The instcm rod of the pneumatic cylinder is shown by numeral 8 and ^e adjustable yoke by numeral 7. The loading member is shown by numeral 9. The pawl shown by numeral 4 is connected to the yoke and is pivoted to a pivot pin shown by numeral 6. The pawl is connected to the yoke though a connecting pin 9. The yoke is adjustable and is tfareadedty disposed on the piston rod. This enables adjustment of downward movement of the top arm assembly to &cilitated the application of the required load to the top roller even when the diameter of the rollers are reduced due to grinding and bufifing. When the machine is switched ON, the {Hston rod (8) moves upwards and the pawl engages with tiie loading member (5) mounted on the top arm assembly. This pulls the top arm assembly downward to a fnredetermined distance to apply the required load on tiie top rdlers ^^ch rest on drafting rollers. When the machine is not in op^ation for more than the predetermined duration of time or due to power fiiilure, the piston rod (8) moves down to a predetermined position. This movement disengages the pawl from the loading thereby releasing the top arm. The pressure cyhnders will cease to exmt load on the tqp rdUers. The upward and downward movement of the pneumatic cylinders are achieved by electro pneumatic means. The invention herein described and claimed does not exclude obvious equivalents and modifications thereof from within its scope. WE CLAIM: 1. An automatic load releasable top arm assembiy comprising atleast a pair of top anns (2) each of said top ann being actuatably mounted on a pneumatic cylinder {3% the piston rods (8) of said pneumatic cylinder tenninating in yokes (7) a loading membor (5) connecting said tc^ anns through a pair of pivotable pawls (4) one end of each us connected to said yokes» the other ends bong engagable with said loading member, said top arm being provided with pressure cylinders (1) for exerting load on drafting rollers. 2. The automatic load releasable tc^ arm assembly as claimed in claim 1, wherein the yoke is adjustably mounted on said piston rod. 3. The automatic load releasable top arm assembly as claimed in claims 1 and 2, wherein the pawl is provided with a pivot pin. 4. The automatic load releasable top arm assembly as churned in claims 1 to 3, wherein the loading member is a loading pin horizontally disposed between said top arms. 5. The automatic load releasable top arm assembly as claimed in claims 1 to 4 wherein the pawl is connected to the piston through a connecting pin. 6. An automatic load releasable top arm assembly ' % 'x.' r'j. -.. substantially as here in described with reference to the accompanying drawings. |
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1096-mas-2000 abstract-duplicate.pdf
1096-mas-2000 claims-duplicate.pdf
1096-mas-2000 correspondence-others.pdf
1096-mas-2000 correspondence-po.pdf
1096-mas-2000 description (complete)-duplicate.pdf
1096-mas-2000 description (complete).pdf
1096-mas-2000 drawings-duplicate.pdf
| Patent Number | 198436 | |||||||||
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| Indian Patent Application Number | 1096/MAS/2000 | |||||||||
| PG Journal Number | 20/2006 | |||||||||
| Publication Date | 19-May-2006 | |||||||||
| Grant Date | 27-Jan-2006 | |||||||||
| Date of Filing | 19-Dec-2000 | |||||||||
| Name of Patentee | M/S. LAKSHMI MACHINE WORKS LIMITED | |||||||||
| Applicant Address | PERIANAICKENPALAYAM COIMBATORE 641 020 | |||||||||
Inventors:
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| PCT International Classification Number | D01H5/22 | |||||||||
| PCT International Application Number | N/A | |||||||||
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PCT Conventions:
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