Abstract: A device is provided for reducing internal reflections from the tire of an ultrasonic search wheel probe or from within the material being examined. The device includes a liner with an anechoic chamber within which is an ultrasonic transducer. The liner is positioned within the wheel and includes an aperture through which the ultrasonic sound from the transducer is directed.

Abstract: A spinning machine arrangement is provided having fiber feeding and opening apparatus arranged upstream of the spinning turbine with respect to a supply of fibers to be spun. This apparatus includes a feeder roll and an opening roll arranged serially in the travel path of the fiber stream, said rolls being housed in a housing having one side formed by a flat baseplate. Individual separate guide parts are detachably attached to this baseplate for guiding the flow of fibers and air through the feeder roll and opening roll. These guide parts are constructed of different materials and machined to different tolerances in dependence upon the specific loads and requirements experienced in use due to the configuration and operation of the apparatus. A cover plate is disposed parallel to and in facing relationship to the baseplate, with the opening and feeder rolls, as well as at least a portion of the guide parts disposed therebetween.

Abstract: The specification discloses a temperature/gas probe for use in a steel-making blast furnace comprising two tubes pivoted together at one end and having mounting means at their free ends adapted to co-operate with support structures within the walls of the furnace, the pivot means and the support means being such that the probe in use adopts a shallow V-configuration substantially corresponding to the profile of the burden in the furnace. Each tube supports a plurality of thermocouples which extend from the tube in spaced relation along the length of the tube. The thermocouples are housed in tubes within the tubes, said thermocouple housing tubes extending to the free ends of the probe tubes to facilitate easy replacement of the thermocouples as they wear out. The thermocouples are connected to a recording apparatus which provides a temperature profile print-out at any desired time. The thermocouple housing tubes may also be used to collect gas samples from the furnace.

Abstract: There is disclosed a flow controller-flow sensor combination especiably suited for gas chromatograph applications wherein a transducer monitors the pressure at the inlet and outlet of a flow restrictor element in the controller thereby to monitor the differential pressure across the restrictor; the differential pressure being proportional to the gas velocity through the flow restrictor element. In one form of the invention, a second flow restrictor element is provided in one input line to the transducer which preferably is of relatively low impedance in order to delay the buildup of the pressure head of the corresponding input of the transducer sensor, thus to enable the pressure at the outlet of the flow restrictor in the controller to buildup gradually so as not to exceed the maximum differential pressure specifications for said transducer.

Abstract: A process is disclosed for preparing slubby strands in which a textile strand is passed either over a surface or through a slubbing tool. The surface, if employed, may include a plurality of fluid passages positioned therein. As the strand passes over the surface or through the slubbing tool, high pressure fluid is introduced onto the surface of and through the strand. The high pressure fluid passes through the strand. This passage of fluid through the strand causes the strand to twist and bulk along its length to form a slub which is rapidly removed from the working surface of the slubbing surface or tool as a consolidated slub positioned on the strand. When a surface is employed, the surface may be a moving surface and when the surface includes a plurality of fluid passages, the passages may be vented at a point below the surface. Various apparatus for carrying out the novel method are disclosed as is the novel strand produced thereby.

Abstract: Temperatures are automatically measured with a Wheatstone bridge including first and second branches and a diagonal connected between taps of the branches. The first branch includes first and second series connected resistors respectively having values of P and Q; the second branch includes third and fourth series connected resistors respectively having values of R and A. A voltage source, having a value E, is connected to energize the branches in parallel. The third resistor is temperature responsive and has a positive temperature coefficient so that the value of R is given by:R = R.sub.0 (1 + .alpha..sub.0 T)whereinR.sub.0 = the resistance value of the third resistor at 0.degree. C,.alpha..sub.0 = the temperature coefficient of the third resistor, andT = temperature in degrees Centigrade.

Abstract: Feeding apparatus is provided for an open-end spinning assembly which includes a feeding table and feed roller facing one another to form a nip which offers sliver to an opening roll disposed downstream thereof. Upstream of the feed roll and feeding table ther is provided a sliver funnel which has an outlet opening facing the feed table and feed roller. In order to accommodate correct laying of the sliver in the sliver funnel so that it is properly disposed with respect to the feeding apparatus, the sliver funnel is disposed and configured so that the outlet opening thereof is visually exposable without opening the housing for the feed roll and feed table. According to preferred embodiments, the sliver funnel is mounted for movement between an in-use position and a servicing position, with the outlet opening being visible when in the servicing position so as to accommodate laying in of the sliver.

Abstract: A positive displacement, reciprocating fluid flow meter produces a digital electrical output signal. The meter includes a piston which reciprocates within a cylinder for accurately measuring fuel flow rates over a wide range of rates. The device is particularly useful in measuring the rate of flow of fuel to an engine, and incorporates a valve for bypassing the piston to permit resetting of the meter at the end of each piston stroke.

Abstract: Evaluating extrudable material by forcing such material through an outlet of a chamber by means of a movable member then stopping and securing the movable member at a predetermined position and measuring the force on the material as it decays with time.

Abstract: A leak detecting device for identification of can tops and similar workpieces with leak holes has a compressed gas supply chamber providing a source of compressed gas for testing the workpieces for leaks. An acoustic testing chamber is mounted adjacent the gas supply chamber. A sealing press is provided between the chambers for holding a workpiece in a gas tight manner so that one side of the workpiece faces the compressed gas supply chamber in a gas tight relationship and the other side of the workpiece faces the acoustic testing chamber in a noise tight relationship. A valve is provided on the compressed gas supply chamber and is operable to admit compressed gas from the gas supply chamber to the side of said workpiece facing the compressed gas supply chamber. An ultrasonic microphone is disposed within the acoustic testing chamber and is adapted for detecting gas noise created by gas passing through a leak hole in the workpiece.

Abstract: A method of completely removing the volatiles in the headspace area of cans, bottles and other sealed containers which comprises inserting first and second penetrating means into the headspace of the sealed container without prematurely releasing the vacuum of the sealed container, passing a carrier gas into the headspace of the sealed container through said first penetrating means and removing the carrier gas and headspace volatiles from the sealed container through said second penetrating means for analysis.

Abstract: Rheological property measurement employing eccentric rotating disc apparatus wherein measurements of viscous and elastic force data are made at multiple displacements of the disc axes to cancel errors.

Abstract: A novel method and mold apparatus for testing adhesion of cord or wire in rubber which measures "intrinsic" adhesion, i.e. adhesive strength independently of the tearing strength and stiffness of the rubber matrix. Each test specimen is formed of two uncured preformed or premolded blocks, called coupons, in respective preform molds. Two wire segments are inserted coaxially between the coupons in preformed grooves and the assembly is molded and cured. The proximate ends of the segments are buried in or embedded within the body of the specimen, but spaced apart along the axis of the wire segments and the body of the test specimen. The specimen is stressed only by the wire segments. In an Instron or like test machine, the free ends of the wire segments are pulled at a selected rate to failure. Failure of the adhesion is observed to start at the embedded end of the wire segment and progress outwardly along the segment which is pulled from the body or matrix.

Abstract: A rotary spinning ring construction is provided wherein the rotary ring body is provided with upper and lower outwardly tapered body portions, each of which has its surface provided with inclined grooves, a ring holder for receiving the rotary body therein, a sliding flange positioned between the holder and the body and having some play therein, and dust caps mounted on the upper and lower portions of the rotary body to seal the upper and lower areas of play between the holder and the rotary body. This arrangement results in a spinning ring construction that will dust automatically.

Abstract: The invention is directed to a pycnometer designed to measure the density of particulate porous polymer samples, particularly polymer samples having hydrocarbons and/or air absorbed in the pores thereof. The apparatus includes a sample cell of fixed volume fitted with a sample container of fixed weight, a gas reservoir of fixed volume, a valved line providing gas communication between the sample cell and the gas reservoir, a linear variable differential transducer to measure the weight of the polymer sample in the sample cell, a variable capacitance quartz crystal for measuring gas pressure in the gas reservoir, and a computer which calculates the density of the sample from the sample weight, and the volume of the sample determined by measurement of a super-atmospheric gas pressure in the gas reservoir when isolated from the sample cell and the equalized pressure established when the gas reservoir is placed in open communication with the sample cell.

Abstract: This spinning machine weighs about 10 lbs. and is of about the size of a one foot cube. The reel on which the spun yarn is to be stored is contained within a large horizontal tube. The yarn is fed through a hole in the wall of the tube from a groove on the outer surface. The reel is rotated by running on the inner surface of the tube which is driven by, for instance, a sewing machine motor. By control of dimensions or by braking a relative speed is imposed between the reel and the tube and is the speed for reeling yarn. The yarn is fed to the groove from two small tubes, one stationary and the other rotating with the large tube. Both are coaxial with the large tube. Locks or sliver to be spun are presented to a surface with saw-tooth corrugations alternating with slots, and is fed to the stationary small tube.

Abstract: The invention relates to fancy yarns, and a method of making them, in which at least two yarns, of which one forms a core and one an effect yarn, are fed to a junction point and then fed together through a heat treatment zone and assembled into the fancy yarn in a false twisting step, the core yarn having been provided with a thermoplastic binder upstream of the junction point by which the effect yarn is adhered to the core yarn.

Abstract: A gas chromatograph having a pneumatic detector adapted to produce a component concentration measurement signal that is relatively unaffected by changes in carrier flow rate. The detector includes an orifice connected in the flow stream at the output end of the chromatographic column to produce a pressure signal responsive to density. This orifice signal also responds to flow rate of the fluid passing through the column. A capillary is connected in series with the orifice to produce a second flow-responsive pressure signal which is subtracted from the orifice signal in a way to effectively eliminate changes in the final measurement output signal due to changes in flow rate while leaving the signal variations due to changes in density, i.e. concentration.

Abstract: Apparatus for indicating rate of ice accretion particularly for use in an aircraft, the apparatus including test surface on which ice forms in use. First and second gas conduits are supplied with gas from a common pressure regulator the inlet of which communicates with a gas supply. A control port of the regulator is supplied with a reference pressure signal and the regulator operates to maintain its outlet pressure at a predetermined amount in excess of the reference pressure. Each of the first and second conduits includes a restrictor and each conduit terminates at its end remote from the regulator in an orifice. The first orifice is adjacent the test surface and a pressure difference sensor is associated with the first and second conduits to produce a signal dependent on the pressure difference at points between the orifice and restrictor of the two conduits. The pressure difference signal is applied to an indicator.

Abstract: A high voltage multi-position switch is disclosed having stored energy and safety trip mechanism associated therewith to facilitate remote control of quick-make and quick-break switch contact operation whereby to provide operator protection during load interruption and close into fault operation of the switch.