Abstract: Open-end spinning machine apparatus is provided for accommodating sequential preparation of a plurality of spinning units of a spinning machine so that they may thereafter be simultaneously started up by common drive means with simultaneous thread piecing operations taking place at each of the spinning units. The piecing preparation apparatus includes one or more mobile units having cleaning apparatus for cleaning the spinning units and apparatus for preparing and transferring a thread end from a bobbin at each of the spinning units to the respective spinning rotors. Certain embodiments of the invention utilize a mobile piecing device which is operable to preform piecing operations at individual spinning units during normal operation of the spinning machine, to also carry the equipment for preparing the plurality of individual spinning units when the machine is completely shut down.

Abstract: An accessory for a gas concentrator-gas chromatograph system including a split heater block hinged to expose a channel shaped to receive a concentrator column. Quick detachable gas connections are aligned with the block channel facilitating rapid and convenient handling of concentrator columns when a number of similar analyses are to be conducted.

Abstract: A system, preferably a pulse echo reflection system, for residual tire life prediction by ultrasound includes: a transmitter transducer; means to provide pulses of electrical energy to the transmitter transducer, that converts the electrical pulses into pulses of ultrasonic vibrations and transmits them into an area of the plycontaining portion of the carcass of a tire, having a number of plies in the carcass, to be tested; clock means to control the frequency of the electrical pulses; a receiver transducer mounted relative to the transmitter transducer to receive ultrasonic energy reflected by the tire; amplifier means connected to the receiver transducer to receive reflected ultrasonic energy from different levels within that portion of the carcass of the tire, including reflected ultrasonic energy from plies of the carcass of the tire; processing means having an input connected to the amplifier; and gate means responsive to the clock means to provide, after a delay following each electrical pulse, a time-g

Abstract: Apparatus for measuring the radial dimensions of a cylindrical tube by ultrasonics by means of which it is possible to measure the radial dimensions of said tube in directions perpendicular to the direction of the ultrasonic beam or beams emitted by one or more transducers, comprising a fixed ultrasonic transducer, whose emitting part is shaped like a cylindrical ring emitting ultrasonic pulses in accordance with a bundle of rays substantially parallel to the generating lines of the cylindrical tube, a truncated cone-shaped mirror whose apex angle is equal to 90.degree. and whose axis is parallel to the radii of the bundle of ultrasonic rays emitted by the transducer or transducers, a rotary shield having at least one opening arranged between the transducer and the tube whose radial dimensions are to be measured and means for collecting the ultrasonic echo returned by the tube and for measuring the time gaps separating the reception of said echos.

Abstract: Filtering property of paper pulp is measured by the height of a filtrate column by periodically immersing a vessel having a filter bottom into the pulp. The device for measuring filtering properties of paper pulp with the aid of the vessel having the filter bottom, has a pneumatic system that immerses the vessel with the filter bottom into or removes it from the pulp at a certain time interval, and also a follow-up system for recording the result of each measurement of the filtrate level in the vessel by the magnitude of the hydrostatic pressure as measured by a bubbler. The device for measuring the filtering property of paper pulp is characterized in that the vessel with the filter bottom consists of two communicating compartments having unequal cross section areas, the bubbler being installed in the smaller compartment.

Abstract: A device for acquiring and displaying acoustic emission fatigue data so as to facilitate the interpretation of dynamic micromechanical failure processes in materials. The load on a specimen under cyclic loading is monitored by a load cell whose output is sent to a cycle counter. The specimen is also monitored by a transducer which senses acoustic emissions. The signal produced by the transducer passes through a preamplifier, filter, amplifier and threshold detector to a pulse generator whose output is connected to the intensity modulation input of an oscilloscope or other cartesian coordinate arraying device. The load cell output is also connected to the vertical deflection input of the oscilloscope. The counter output is connected to the horizontal deflection input of the oscilloscope.

Abstract: The instant Brinell sandwich transducer has a layer of small hardened steel alls between two layers of softer materials. The balls may be closely packed or separated into a less dense array by a spacer. Indentations in the softer materials indicate the maximum compressive forces that have been applied to the balls. The diameters of identations in a sampling pattern are measured by a microscope since such diameters indicate the magnitude of the forces which have been registered by the transducer. Good resolution over a range of more than a factor of 100 has been obtained. With pulses ranging from static to approximately half-sines with rise times of 0.1 millisecond and a fall time of 0.1 millisecond, rate effects have been insignificant. That is, the indicated gauge pressure is not sensitive to the rate at which the pressure is applied for a broad range of pulse rise times and durations. Also, these gauges incorporate high axial stiffness and flat geometry.

Abstract: A taping device permitting tension-free winding of tapes. It comprises guide hooks between which the tape passes disposed as close as possible to the product to be taped. Applications: manufacture of optical fibre telecommunications cables and special cables.

Abstract: A method and apparatus for sensing the presence or absence of yarns using a simple airflow in an open slot formed between parallel plates, the pressure upstream of the proper yarn path being sensed. In one form, the pressure is sensed at multiple points and averaged to accommodate yarn oscillation.

Abstract: In an apparatus for locating inhomogeneities in otherwise homogeneous bodies by the ultrasonic pulse-echo method an angle probe is used in connection with an acoustic signal emitter, adapted to produce an audible signal, a characteristic of which, e.g. the intensity, varies in a continuous manner with the amplitude of the reflected ultrasonic pulses.

Abstract: Improved method, and apparatus for practicing the method, for determining parameters of a staple length distribution of fibers in a yarn sliver by feeding the yarn sliver to and between two pairs of drafting rolls initially spaced apart at a greater distance than the longest fiber in the yarn sliver and monitoring the drafting force exerted upon the yarn sliver while continuously decreasing the distance between the pairs of drafting rolls and monitoring the distance, and generating signals representative of the drafting force and distance and feeding them, respectively, to the Y-axis and X-axis of a X-Y recorder and drawing a curve therefrom from which the desired parameters can be determined.

Abstract: Stress wave emission signals emanating from a weld during an AC welding operation are detected during (1) the time when the AC power is on, (2) the post weld time period, and (3) during each half-cycle of the AC weld when the absolute magnitude of the current is decaying. The stress wave emission signals are counted in each of these periods and compared to predetermined ranges of values to determine the acceptability of the weld.

Abstract: Signals emanating from a weld are detected during the post weld period and excursions of the detected signal above a predetermined threshold are counted. Simultaneously, an envelope of the signal is developed and excursions thereof above the threshold are also counted. A ratio of the signal excursion count to the envelope excursion count is formed. The ratio so formed is compared to known ranges of ratio values to determine whether the detected signal is mechanical noise or a stress wave emission signal.

Abstract: False-twisted yarn uniformly fused in alternate s- and z-twisted state, and having crispness characteristic of hard twist yarns is provided from partially oriented polyester filament yarn by subjecting the said polyester filament yarn to simultaneous draw false-twisting process employing lower draw ratio, lower number of false twists and higher heat setting temperature.The partially oriented polyester filament yarn used as a feed yarn has birefringence value of 0.03 - 0.10 and break elongation of 70 - 200%. General range of processing conditions is such that draw ratio of 0.7 R.sub.o - 0.95 R.sub.o wherein R.sub.o is an apparent draw ratio to impart a drawn yarn break elongation of 30% when a feed yarn is drawn at such draw ratio (R.sub.o), false twist per meter of 15000/.sqroot.De - 28000/.sqroot.De wherein De stands for a denier of the yarn passed a false twisting mean, and heat setting temperature of 225.degree. - 255.degree. C.

Abstract: Apparatus for evaluating a measurement signal having an initial transient issuing into a more stationary value include equipment for monitoring the rate of change of the measurement signal. This monitoring equipment issues a control signal when that rate of change falls below a predetermined value. An analysis of the measurement signal is initiated in response to the latter control signal.Apparatus for evaluating at least two measurement signals generated by two transducer probes and having mutually overlapping initial transients issuing into more stationary values at different times include equipment for determining the time sequence wherein the measurement signals issue into the more stationary values. The measurement signals are sequentially applied to evaluating equipment in accordance with that determined time sequence.

Abstract: In an apparatus for pressure testing open-ended pipes or the like there is provided a novel sealing means to form an air-tight seal between the open end of a pipe to be tested and an end plate of a pipe supporting test fixture. The sealing means comprises a continuous, annular, yieldable sealing member of triangular cross-section supported on the end plate. A pneumatically expandable annular actuator is associated with the continuous sealing member. The sealing member is normally spaced radially and axially from the junction area of the pipe end and test fixture end plate. The pneumatically inflatable actuator is operative to expand the continuous yieldable sealing element radially and simultaneously to advance it longitudinally, whereby the triangular sealing member is tightly wedged into said junction area to form a preliminary seal. When test pressure is applied, it acts upon the triangular sealing member to increase the seal effectiveness.

Abstract: An ultrasonic imaging apparatus is disclosed having a display selectably interchangeable between a shades of gray image presentation and an edge enhanced image presentation to facilitate distance measurements of the image on the display screen. A first filter network processes echo responsive electrical signals for preserving echo amplitude information in a shades of gray image presentation and a second filter network processes the echo responsive electric signals for enhancing only the leading edge of the electrical signals.

Abstract: A food temperature-sensing probe assembly for monitoring the internal temperature of food while it is being cooked in a microwave oven includes a disc-like reflector either slidably or fixedly mounted on the probe housing adjacent to, but spaced from, the food. The reflector serves to prevent overcooking of the food in a region immediately adjacent the probe.

Abstract: Disclosed is a spooling apparatus that can be threaded on the fly to anchor, controllably twist and wind filament onto a receiving spool. A receiving spool is non-rotatably mounted on a spool shaft for axial reciprocation. A lead-in pulley, whose rotational axis is perpendicular to the receiving spool axis, is spaced axially outboard with respect to the receiving spool. A flier is mounted to rotate concentrically about the receiving spool and presents a pick-up head adapted to engage the feed run of the filament as it passes between the lead-in pulley and an orienting pulley located in proximity to the inboard end of the receiving spool. The orienting pulley is canted such that the tailing run of the filament cannot be engaged by the pick-up head as it rotates with the flier although the canting of the orienting pulley disposes the feed run such that it will be engaged by the rotating pick-up head when the spool reaches a predetermined position along its range of axial reciprocation.

Abstract: This invention relates to a thermometer and more particularly to a fast response clinical thermometer. The active element is in the form of a thin sleeve which is in direct contact with the body tissue or other item to be measured. The large ratio of surface to volume of the active element permits it to reach temperature equilibrium rapidly. Temperature dependent changes in the sleeve material influence a coil which is inductively coupled to the sleeve. The coil in turn controls an oscillator frequency which can be converted to a digital display of the measured temperature.