摘要:
An apparatus for forming, drawing and winding synthetic yarn materials wherein tension on the yarn during passage from the drawing to the winding means is controlled by a compensator device additionally effective to actuate aspirator means and yarn severing means should a yarn break occur, thereby eliminating an excessive build-up of yarn on the drawing means and resultant yarn waste, the apparatus desirably further embodying a plurality of drawing means particularly positioned with respect to one another and providing a generally upwardly directed path for the yarn through specific stages of the drawing cycle.
摘要:
A winding machine, such as a UNIFIL loom winder, manufactured by Leesona Corporation, Warwick, Rhode Island 02887, has a spindle assembly for receiving and rotating a bobbin, and a traversing assembly including a traversing member releasably threadedly secured to a traverse rod, during winding, for guiding a strand of yarn being wound onto the bobbin. Upon completion of winding, the traversing member is released from the traverse rod and the traversing member is returned to its starting point, the yarn is cut between the traversing member and the doffed, filled bobbin, and the cut yarn is engaged for winding onto an empty bobbin previously donned onto the winder. The traversing and spindle assemblies are driven by mechanism within a casing of the winder. This mechanism includes a continuously driven drive shaft connected by a clutch with a spindle shaft during winding, and disengaged at the termination of winding. A power take-off from the spindle shaft drives cams rotatably received on the spindle shaft for rotating and reciprocating the threaded traverse rod to provide the traversing member with builder and reciprocating motions. Lubrication of the rotatable cam and spindle shaft, and other portions of the mechanism within the casing, is provided by a rotating slinger which projects atomized lubricant upwardly through a duct and onto aprons of an upper duct from which the lubricant flows through channels and passages to lubricate the cam and spindle shaft. When the traversing member has been returned to its starting position, a cycling mechanism causes the clutch to again drivingly engage the drive shaft and spindle shaft whereupon the cycle is repeated.
摘要:
Apparatus and a method for winding a package positioned on a spindle assembly and held against a roller bail with substantially continually decreasing winding pressure as winding progresses and the spindle assembly moves across dead center with gravity first urging the package toward the roller bail and then away from the roller bail. Upon initiating winding, a primary spring functions to urge the package away from the roller bail as the spindle assembly approaches dead center and the weight of the package increases. Later, second and third springs come into play to urge the package against the roller bail. Preferably, the second spring comes into play and counteracts the primary spring well before the spindle assembly reaches dead center and the third spring comes into play when the spindle assembly is proximate dead center.
摘要:
A MAT OF POLYFLUOROCARBON FIBERS HAVING CONTROLLED PORE SIZE AND HYDROPHOBICITY IS IMPREGNATED WITH A CATALYTIC SUBSTANCE TO FORM A LIGHT-WEIGHT CATALYTIC MASS HAVING A LOW, UNIFORM LOADING OF THE CATALYTIC SUBSTANCE. THIS CATALYTIC MASS, PARTICULARLY WHEN COMBINED WITH AN ELECTRICALLY-CONDUCTING ELEMENT, AND/OR A CONTINUOUS HYDROPHOBIC POLYMER MEMBRANES IS SUITABLE FOR USE AS AN ELECTRODE IN AN ELECTROCHEMICAL CELL, E.G. AS A FUEL OR OXIDANT ELECTRODE IN A FUEL CELL OR AS THE CATHODE IN A METAL-AIR BATTERY, WHEREIN IT PROVIDES HIGH CURRENT DENSITIES AT RELATIVELY CONSTANT VOLTAGES OVER A LONG PERIOD OF TIME.
摘要:
Lightweight electrodes for use in an electrochemical device are described. In one embodiment the lightweight electrodes comprise a catalyst layer including an admixture of catalyst and a fluorinated phosphonitrile polymer. In another embodiment the hydrophobic backing layer is a continuous film of fluorinated phosphonitrile polymer with a contiguous layer of catalyst thereon. The catalyst can also be admixed and bound with particles comprising the same fluorinated phosphonitrile polymer used as the backing layer, derivatives of the polymeric material or other hydrophobic polymers such as polytetrafluoroethylene. The electrode is adapted to be disposed in an electrochemical cell with the catalytic layer in contact with the cell electrolyte.
摘要:
A ring twister having lubricated balloon control rings which facilitate handling yarns at substantially higher speeds. The rings may be of porous material for passage of the lubricant therethrough, or they may be nonporous material having ports for passage of the lubricant to the yarn. The rings are generally applicable to spinning frames and any other equipment on which control of a ballooning strand is desired.
摘要:
A method of preparing a porous hydrophobic polymeric matrix is described comprising precipitating a hydrophobic polymer onto loose fibers having a charge opposite to that of said polymer to form a polymer-fiber aggregate, shaping said aggregate, heating said shaped aggregate at an elevated temperature at which said precipitated polymer will sinter and said fibers consumed, and maintaining said aggregate at said elevated temperature for a time sufficient to sinter the polymer and consume the fibers, forming a pliable and coherent porous matrix.
摘要:
Strand-traversing mechanism having a pair of oppositely traveling belts each with yarn-engaging guides for moving the yarn along a traversal path with effectively uniform controlled movement and transferring the yarn to an oppositely moving guide at reversal ends of the path. During transfer of the yarn from one guide to another, the portions of the belts on which the guides are mounted are directly supported on pulleys which steady the guides. Pulleys intermediate the traversal path further steady the guides and cause the guides to move to and fro across the strand of yarn for effectively preventing grooving of the guides. The traverse belts are preferably formed from timing belts having on one belt face teeth for direct positive drive by correspondingly notched pulleys and each yarn engaging guide is preferably connected to its belt by a clamp passing at least substantially entirely around the belt and replacing one of the teeth on the belt face.
摘要:
ZINC ELECTRODES CONTAINING A MINOR AMOUNT OF A METAL WHICH IS CAPABLE OF CREATING CATION VACANCES IN A ZINC OXIDE LATTICE SUCH AS GALLIUM OR TIN ARE DESCRIBED. THE GALLIUM OR TIN ADDITIVE HELPS TO PREVENT PASSIVATION OF THE ZINC DURING RAPID DISCHARGE OF THE ELETRODES IN AN ELECTROCHEMICAL CELL AND REDUCES THE AMOUNT OF CELL ELECTROYLYTE NEEDED FOR EFFICIENT PERFORMANCE. THE GALLIUM OR TIN IS PREFERABLY INTRODUCED INTO THE ZINC BY MEANS OF ALLOYING, E.G., BY ELECTROLYTIC CO-REDUCTION OF ZINC AND GALLIUM AND/OR TIM COMPOUNDS.
摘要:
A method of forming lightweight electrodes is described comprising forming an admixture of electrochemically active metal and hydrophobic polymer in a fluid medium, applying said admixture to a porous metal support, lightly pressing the admixture into and around the metal support and thereafter heating in the absence of applied pressure at a temperature sufficient to bond said polymer particles to each other and to said support.