Abstract: A wax body is rotatably and slidably mounted on a guide pin which, in turn, is pivotally mounted about a horizontal axis. The guide pin and wax body are movable between a working position in which a yarn is run between the wax body and a stop on the guide pin and an idling position in which the wax body and guide pin are moved out of the path of the yarn. Yarn piecing up can be accomplished when the apparatus is in the idling position without interference from the wax body.

Abstract: A data collection and reduction system for a shock suppressor valve test system is provided. The test system includes a flow meter for generating a DC voltage signal corresponding to the velocity of fluid flowing through the flow meter and a recorder for recording and outputting an AC voltage signal corresponding to the velocity of fluid flowing through the flow meter. The data collection and reduction system includes circuitry interconnected to the flow meter for amplifying the DC voltage signal generated by the flow meter to produce an amplified DC voltage signal. Circuitry converts the amplified DC voltage signal to an AC voltage signal for application to the recorder for recordation of the velocity of the fluid flowing through the flow meter. Circuitry is further provided and interconnected to the recorder for amplifying the AC voltage signal output by the recorder.

Abstract: Yarns or filaments from producers packages, having little or no twist therein and mounted upon two-for-one spindle units, are uptwisted, directed to a ply twisting unit where the twisted filaments are plied and downtwisted onto a takeup bobbin of a spindle unit. A selected percentage of the required twist is inserted as the plied, cabled filaments are wound upon the takeup bobbin and the remainder of the required twist inserted as the filaments are unwound from the takeup bobbin and directed to a winder unit. Alternatively, the rate of twist applied to the plied filaments may be increased by driving the traveler ring, thus increasing the life or the speed of the traveler which directs plied filaments to the driven takeup bobbin. Occasionally, when two-for-one spindle units are applying extremely high twist, which slows down the delivery of twisted plied filaments, the driven downtwist takeup spindle unit may employ a super high speed stationary traveler ring.

Abstract: A receiver of thermal radiation of thin film deposit material of high temperature coefficient of electrical resistance having surface absorptive characteristics.

Abstract: The invention relates to a process for the manufacture of a core/skin or core/sheath yarn, whose skin- or sheath-forming filament is wrapped around the core yarn in alternating "S" and "Z" directions. It relates furthermore to a device to carry out the process using otherwise known single spindle friction falsetwisting units.

Abstract: A bulked and entangled multifilament thermoplastic yarn and an improved process for the formation thereof which, when tufted into a fabric, presents a grass-like appearance. The yarn is made by melt spinning and water quenching filaments of a melt spinnable synthetic organic thermoplastic polymer, such as polypropylene, in a continuous process, drawing the filaments, imparting bulk and entanglement in a fluid jet entangling mechanism and taking up the thus entangled yarn on a yarn winder. Also disclosed is an improved fluid jet entangling mechanism employed in the process.

Abstract: The invention contemplates a sealed electrical-meter construction for measuring an electrical quantity such as an electrical resistance, and having particular application to the display of liquid-level where measured resistance is a function of observed liquid level. The meter construction provides a transparent side port at which a solar-cell assembly is exposed to external light, and the voltage output of the cell, after reduction to assure constant-voltage level is used to power the measuring circuit. Fiber-optics elements at the transparent side port convey light to the display face of the meter, so that even a flashlight at nighttime is sufficient to excite the solar-cell assembly and illuminate the display face.

Abstract: A temperature sensor particularly adapted for use with digital displays or controls comprises an oscillator circuit coupled to a capacitor formed of ferroelectric material in order to provide a linear relation of frequency with temperature. Both chip and multilayer capacitors are shown to be useful as the sensing element.

Abstract: A method for producing ingrain spun-like yarn simulating a blended staple yarn is described wherein continuous filament yarn is produced which has characteristics similar to blended staple spun yarns. Fabrics made from the yarns described herein provide a fine grained heather appearance without the normal moire or plaiting effect seen in previous ingrain continuous filament yarn fabrics. The unusual continuous filament yarn described herein is made by a texturing process which involves the combination of two or more differently dyeable continuous synthetic yarns which are false twist textured followed by overfeeding to an air bulking means. The preferred method utilizes false twist texturing of synthetic filaments such as polyester, nylon, cellulose acetate or cellulose triacetate and mixtures thereof wherein two differently dyeable yarns are combined with an air bulking jet interposed to act on the false twist textured yarn while it has a high residual torque and subsequently decaying said torque.

Abstract: The present invention relates to a method of producing a twisted polyester filament yarn having a high level of twist used for a woven or knitted crepe fabric.A method of this invention comprises imparting a high level of twist to a polyester filament yarn which has particular properties, and heat setting said twisted polyester filament yarn. The first of these properties which the polyester filament yarn has is that a boil-off shrinkage in boiling water is in the range of 0% to 5%. The second is that a thermal shrinkage stress at 140.degree. C. in hot air is more than 0.03 g/de. The third is that a ratio of a thermal shrinkage stress at 180.degree. C. in hot air to a thermal shrinkage stress at 140.degree. C. is more than 1.0.The polyester filament yarn which has above mentioned properties can be obtained by repeating heat treatment several times at a temperature from 160.degree. C. to 220.degree. C.

Abstract: The present invention relates to a method and an apparatus for changing the ratio of the yarn taking-up speed to the number of revolutions of the rotor at the time of yarn piecing and normal spinning. According to the present invention, the ratio of the yarn taking-out speed to the number of revolutions of the rotor at the time of yarn piecing has a different value from that employed at the normal spinning, while the ratio of the yarn taking-out speed to the sliver supply speed is made constant at the time of yarn piecing as at the normal spinning, in a manner such that the spun yarn has fewer number of twists at the normal spinning than that at the time of yarn piecing. The rotor speed may also be simultaneously reduced as the speeds of the take-out and sliver supply are reduced.

Abstract: An apparatus for controlling the driving of an open-end spinning machine whereby driving members such as feed roller, winding roller and draw-off roller are operated at timings optimum for spinning conditions at the time of starting or stopping the machine. Optimum conditions are determined by the amount of yarn wound on a yarn take-up roll of the apparatus.

Abstract: Thermistors comprising transition metal such as iron, rare earth of the lanthanide series or yttrium, and oxygen exhibit sufficient independence to variation in oxygen partial pressure over a range of exhaust gas conditions of internal combustion engines as to make them particularly suitable for temperature compensation of oxygen sensors such as those derived from titania as well as temperature sensing in other oxygen varying environments.

Abstract: A load cell having a hollow central measuring body, a base section for supporting the measuring body, and a load receiving section for receiving a load at substantially one point and transmitting the load substantially uniformly to the hollow central measuring body. The load receiving section includes an extension extending into the hollow portion of said measuring body to reduce the deflection of said load receiving section when load is applied to the load cell. The base section includes a reduced section to cause the base section to deflect under load to compensate for deflection of the load receiving section under load.

Abstract: A long spinning machine, preferably a ring spinning machine, with a plurality of drawing means, which serve to draw the fiber strands with the drawing means being arranged adjacent to each other and extending lengthwise of the machine the drawing lower rollers of the drawing means formed by a plurality of long roller lines positively connected together at one point by drive gear transmissions which provide predetermined rpm ratios between the roller lines with some of the roller lines connected together by additional drive gear transmission at least at one additional point spaced from the one point to eliminate or substantially reduce torsion in the roller lines.

Abstract: Temperature dependent actuating mechanism comprising a temperature responsive sensor including a variable volume chamber in fluid communication with a chamber in an actuator containing a variable volume member connected with an operating member; the sensor further including temperature responsive means change in volume of which brought about by a rise in temperature increases the interior volume of said variable volume chamber to permit fluid to flow out of said actuator chamber and the volume of said variable volume member to increase with resultant movement of the operating member.

Abstract: Apparatus is provided for detecting leakages in hydraulic equipment. A pressure supply line of the equipment has alternate fluid flow paths controlled by respective, oppositely directed non-return or one-way valves which are pre-loaded as by springs. A restricted flow transducer is located in a bypass line which bypasses the alternate fluid flow paths for sensing pressure drops in the system.

Abstract: A wheel velocity sensor of the type having a toothed rotor and a stator with a detecting head mounted adjacent the rotor in proximity with the rotor teeth. The rotor is assembled with the bearing seal in the wheel hub as an integrated unit, being encased within a cavity formed in the seal to receive the rotor. The detecting head of the stator contacts the face of the seal, which is coated with a low friction material, so that a constant gap is maintained between the detecting head and rotor during rotation of the wheel to obtain more accurate wheel velocity signals.

Abstract: A random signal generator using a maximum-length shift register sequence to provide control pulses to a slub yarn producing open end spinning system. The time between control pulses is random to prevent any discernible pattern appearing in the fabric made from the yarn.

Abstract: A float for the control of liquid level, and method of making same comprising one or more blow moulded float bodies, each with an integral compression moulded tag, and an injection moulded mounting or bridge secured to the or each tag and shaped to support the float in a carburettor or other reservoir.