Abstract: A housing has elongated cavities in which four hot wires forming the arms of a bridge are disposed. Each hot wire comprises a first segment bent in half to extend along the length of the cavity away from a junction, and a second segment bent in half to extend along the length of the cavity away from the junction in the opposite direction from the first segment. The junction is centrally located relative to the ends of the cavity. The first and second segments are electrically connected to each other at one end and are electrically connected to other hot wires in the bridge at the other end by a printed circuit board at the junction. The middle of each segment is wrapped around first and second closely spaced rods deformed to exert tension on the segment. The circuit board is located in a chamber having a larger cross section than the cavities. In using the apparatus for chromatography, unknown gases in a carrier enter one of the cavities near the chamber.

Abstract: A rheometer comprises adjacent surfaces moveable relative to one another e.g. a pair of rollers, means e.g. a motor for moving one or both surfaces and means for measuring the effect of or on the movement when a sample under test e.g. a sheet moulding composition is placed between and in contact with the surfaces.

Abstract: A fuel dispensing system having a positive displacement vane type fuel meter with an enclosed rotor assembly mounted within a fluid tight housing and connected to a fluid inlet and outlet of the housing to be rotated in direct proportion to the volume of gasoline conducted through the meter and two alternative embodiments of electrical pulse generating means with two Hall effect pickups mounted externally of the housing, ferromagnetic plugs extending through the housing and ferromagnetic means mounted on the rotor assembly to cooperate with the ferromagnetic plugs to generate an electrical pulse with each pickup for each predetermined increment of gasoline conducted through the meter.

Abstract: An alloy composition comprises lead, tin and zinc, each being present in an amount of between about 20 and about 45% by weight. Preferably, the composition also contains small amounts of up to about 0.1% each of copper and tellurium. When in contact with water or other aqueous composition, the alloy generates a current directly proportional to the alloy surface area exposed to the liquid.

Abstract: Apparatus for checking the valves of aerosol containers for tightness, in which a vacuum is produced under the valve being checked by pressing the valve by its shut-off member in the open position against a resilient member on a seat in order to deform the resilient member which, after removing the force of pressing and closing the valve, tends to return to the initial position, thereby increasing the volume of the cavity under the valve. This permits reducing the time of exposing the valve to the vacuum. The seats are made blind and are arranged on an endless conveyor which moves the seats with the valves to the mechanisms effecting the operations.

Abstract: In a method for the manufacture of twistless or substantially twistless yarn a sliver or a roving of staple fibres is used as basic material. The sliver or the roving is wetted by a liquid mixture containing a latent solvent for at least a portion of the staple fibre material and drafted in a wet condition to form a thinner fibre strand, which is subsequently false twisted and bonded. The fibre strand is bonded by activation of the latent solvent under an increased temperature, and dried under evaporation of the solvent.

Abstract: Flow of fluid through a heated electrically conductive conduit is measured by detecting changes in resistance of the conduit caused by the flow. A resistance bridge is connected to spaced points along the conduit for performing the measurement.

Abstract: A sender device for use in a system indicating liquid level including a pivotal contact member having sliding and overlapping contact with an evenly wound, straight resistance member providing an output that varies as a non-linear function of movement of the contact member.

Abstract: A device for ultrasonic examination, comprising a flat mosaic of a row of transmission transducers and a number of rows of receive transducers which are symmetrically arranged with respect thereto. The device furthermore comprises means for applying actuation pulses to one transmission transducer at a time, and means for enabling receive transducers in the time interval following each actuation pulse, and for at the same time displaying on an image display device an image of a section of the examined body in a plane perpendicular to the plane of the mosaic and through the line of transmission transducers.

Abstract: Container pressure testing apparatus includes a housing having an open portion for sealably engaging the container surface circumscribing a pour opening of the container. Pressurized air is issued from the housing through the pour opening into the container and, on preselected container pressurization, a closure member for the pour opening is displaced within the housing in the direction of the pour opening. On the occurrence of predetermined pressure-induced force on the enclosure member, the closure member is rotated into securement with the pour opening.

Abstract: A method for detecting contamination of a liquid, particularly a Quench Oil, comprises introducing a sensing element at a high temperature into a liquid, allowing the sensing element to commence cooling, and thereafter timing the cooling of the sensing element between two selected temperatures. The time thus measured is compared with a pre-set time, to provide an indication of contamination of the liquid. In apparatus for carrying out the method, a slug of stainless steel in which is embedded a thermo couple is heated in a furnace and then lowered into a receptacle containing the liquid under test. These operations, and the timing and comparison, are effected in a pre-determined automatic cycle.

Abstract: Apparatus and method for grey-level ultrasonic imaging employing a storage oscilloscope. In medical diagnostic uses, a patient originated ultrasonically reflected wave is converted into an electrical signal which is so modulated as to result in grey-level type display on a bistable type storage oscilloscope or otherwise recorded or displayed. This display may be directly produced and immediately viewed.

Abstract: A tamperproof housing for a remote register for a utility meter, constructed of impact-resistant materials and designed for ease of mounting, assembly and accessibility.

Abstract: An electromagnetic transducer is provided for ultrasonically inspecting conductive material as the material moves relative to the transducer. A coil is positioned in the field created by a magnet so that the conductors of the coil are transverse to the magnetic field. The coil is located predominately near the leading side of the magnet where flux is concentrated as the magnet and material move toward each other.

Abstract: A centering gauge arrangement for a yarn friction false twist device which includes a plurality of concavities or depressions spaced above the circumference of the gauge with the respective concavities or depressions being engageable with reference surfaces provided on parallel equiangularly spaced shafts of the yarn friction false twist device. A handle portion is provided on the centering gauge to facilitate a loading and unloading of the centering gauge from the yarn friction false twist device.

Abstract: Self-twist plural yarn strands are produced by a system wherein at least two singles yarn strands are individually twisted to form twisted strands each having longitudinally spaced nodes, and strands are brought together in a parallel relationship with the nodes of one strand substantially aligned with the nodes of each other strand. The corresponding nodes from one strand are fastened to those of each other strand, and the strands are allowed to ply. The node fastening means comprises a rotating member having a contact surface for fastening the nodes by gathering and twisting of the fibers from one strand with those of another strand at the nodes of each respective strand. Ply yarn twist uniformity is assured through the use of improved twist insertion jets, together with a means for holding singles yarns separate to allow longitudinal levelling of singles yarn torque prior to plying. .

Abstract: A trolling reel for raising and lowering a weighted trolling wire having a temperature responsive element electrically coupled to the end thereof incorporates a small diameter trolling wire comprising an outer conductive sheath made of several strands of stainless steel wire surrounding an insulating layer positioned between the stainless steel sheath and a coaxially aligned center conductor. The trolling wire so formed provides a relatively high tensile strength wire for the weighted trolling line as well as displaying corrosive resistant properties for use in a saltwater environment. The wire also has the desired electrical properties for use in providing a temperature readout of the location of the end of the trolling line.

Abstract: A method of maintaining the peripheral speed of a textile yarn or tape package being wound on a positively driven take-up spindle at or about a predetermined speed comprising sensing the peripheral speed of the package, comparing this speed with the predetermined speed and varying the drive to the take-up spindle in accordance with variations between the actual and set or predetermined speeds of the package until the peripheral speed of the package is substantially equal to the set or predetermined speed.

Abstract: A leak detecting apparatus comprises an opened-bottom box having a peripheral seal and a transparent top. Air is removed from the box by means of an ejector to provide a vacuum to inspect membrane for leaks and water pumped into the box to permit easy movement over membrane being tested.

Abstract: A testing apparatus is provided for comparative testing of disk passage resistance of various disks in a high energy loss disk stack to detect blocked, broken down or irregularities in the various disks or individual passages thereof. The testing apparatus includes a plug which is sealably movable within a central core of the disk stack to supply air to labyrinth passageways formed at predetermined stack heights by aligning an air outlet on the plug with the labyrinth passageways formed at that stack height. The plug is connected to a pressure gauge calibrated to indicate a normal range of labyrinth resistance. Readings below the normal range indicate broken down or low resistance labyrinths while readings above the normal range indicate high resistance or blocked labyrinths.