Abstract: A method and apparatus for controlling the traversing frequency during the winding of a cross-wound package. In so doing, a signal is detected which is generated by the motion of the yarn while being wound onto a yarn package. Thereafter, the signal is analyzed by frequency, and/or amplitude, or other characteristics. Finally, the traversing frequency of the yarn takeup system is adjusted or varied as a function of the analysis result. In the preferred embodiment, the signal is proportional to a development of airborne sound or a development of solid-borne sound, each of which is generated in response to the motion of the advancing yarn on the package being formed. The method of the present invention allows disturbances in the winding operation to be avoided, such as the formation of so-called ribbons and similar phenomena.

Abstract: A melt spinning apparatus adapted for spinning a plurality of preferably monofilaments each having a denier which is maintained within close tolerances. The apparatus comprises a nozzle head having a plurality of vertical bores which are annularly arranged about a central axis and a nozzle assembly in each of the bores. A separate melt delivery system delivers pressurized melt to each nozzle assembly, and in a preferred embodiment, each separate melt delivery system comprises one of the discharge outlets of a planetary gear pump.

Abstract: A yarn texturing apparatus is disclosed which includes a nozzle having a yarn duct therethrough, and a perforated stuffer box at the outlet end of the duct. Heated air is introduced into the duct, and the air is heated by a heater which is positioned in the air supply line leading to the nozzle. The output of the heater is controlled by a temperature sensor which is positioned inside the stuffer box. Also, the nozzle comprises two confronting sections which can be separated to facilitate yarn thread-up, and a valve is provided in the supply line to divert the heated air to an exhaust line when the nozzle is opened. A second temperature sensor is positioned in the supply line and is operative when the nozzle is opened to regulate the output of the heater and avoid large fluctuations of its output.

Abstract: A process for the preparation of a stabilized, modified, aqueous chlorite solution with a peroxy compound content is described. A weak, acid, aqueous solution of a peroxy compound substantially stable therein is provided and into this solution is metered an aqueous solution of a chlorite until the pH-value of 7 is exceeded, accompanied by the formation of a greenish solution. The peroxy compounds can in particular be peroxy sulphates, percarbonates and perborates of alkali metal or alkaline earth metals, as well as hydrogen peroxide. The chlorite solutions obtainable according to the above process are stable over a long period and have a high oxidative activity, particularly when used as a biocide. The biocidal action can be used with particular advantage in water treatment and in the external treatment of skin diseases.

Abstract: An edge protector 7 for electrodes 1, comprises first and second elongate elements 8, 9, both of superficially electrically insulating material, the first element 8 having a generally "H"-shaped cross-section so as to provide open slots on opposite sides, one slot defined between a pair of outer jaws 12 and the other slot defined between a pair of inner jaws 10, a bare or suitably gasketed edge 6 of an electrode 1 being insertable into and located within the inner jaws 10, and the second element 9 being constituted by a member so dimensioned as to be an interference fit within the outer jaws 12, whereby the outer jaws 12 are forced further apart with the result that the outer jaws 12 endeavour to close the inner jaws 10 to form a seal to prevent electrolyte from wetting the edge 6 of the electrode 1.

Abstract: In apparatus for picking up a test sample of molten metal or metal alloys and measuring the cooling curve of said sample, comprising a sample receptor and an optical conductor leading from the receptor to a transducer, the receptor is a small, open ended refractory tube having a cavity for receiving the molten sample arranged at the free extremity of a lance with the optical conductor contained within the lance and terminating at the cavity in said receptor and a barrier is disposed between the cavity and the optical conductor, the barrier consisting of a heat resistant, highly thermally conductive material of such quality as to cause the material of the melt sample which is picked up to adhere thereto.

Abstract: In the stuffing of synthetic continuous filamentary threads in stuffer boxes, special value is to be placed on the thermal treatment and especially the cooling of the initially crimped filaments. The filaments in the configuration of a compact thread plug, which is formed in the stuffer box, can be wound on a rotatably driven drum in several helical windings, the last thread plug winding can then be disentangled again at the end of the drum, and the finished texturized thread drawn off. The disentangling of the thread plug and the drawing off of the thread is improved by the present invention through an application of axial and/or radial forces or pressures onto the last thread plug winding in the region of the disentangling point. Suitable mechanical and pneumatic devices are provided by the invention for this purpose.

Abstract: Apparatus for the determination of bond forms of gases, such as a sample containing oxygen or nitrogen in solid or liquid small metal samples (e.g. from 0.8 to 1.2 g).The apparatus includes a furnace to heat the sample to a temperature of about 3000.degree. C. maximum in less than five minutes, a control device to control the rate at a value between 20.degree. C./sec and 350.degree. C.

Abstract: The invention relates to a method for measuring the cooling curve of a test sample of metal or a metal alloy, in particular cast iron or cast steel, for the differential thermal analysis in which the difference of the cooling curve of the test sample of a fixedly given comparative curve which satisfies Newton's law of cooling (U=U.sub.0 .times.e.sup.-t/RC, the U.sub.0 parameter being the maximum value at the point in time t=0 and the RC parameter being the time constant) is formed, said comparative curve being brought to coincidence with a section of the cooling curve of the sample by adjusting its parameters so that the difference can then be formed between the adjusted comparative curve and the cooling curve.

Abstract: A spring support device has a housing; a coil spring having one end supported in the housing and another end carrying a spring disc; at least two bell crank levers arranged on the spring disc symmetrically to the coil spring; and a fulcrum slidably and pivotally supporting each bell crank lever on the spring disc. Each bell crank lever has a first arm extending from the fulcrum generally parallel to a radial plane of the coil spring and each bell crank lever has a second arm extending from the fulcrum at an angle to the first arm. The first and second arms have an end remote from the fulcrum. A pull rod has one end adapted to carry a load and another end at least indirectly articulated to the end of each first arm. The spring support device further comprises a mechanism for guiding the end of each second arm in a stationary, arcuate path oriented generally parallel to an axial plane of the coil spring.