Abstract: A polyester spun-like textured yarn comprising: a core portion; and a wrapper portion continuously and alternately wrapping about the core portion. The core portion comprises a polyester multifilament yarn (A) which is not dyeable with ionic dyes. The wrapper portion comprises polyester multifilament yarns (B) and (C) which are entangled with each other. The yarn (B) is not dyeable with ionic dyes, and the yarn (C) is dyeable with ionic dyes. Some of the filaments constituting the wrapper portion are entangled and interlaced with some of the filaments constituting the core portion in the boundary region between the core and wrapper portions.

Abstract: A rotation resistant rope comprising a central multi-wire strand of Seale's construction, an intermediate layer comprising a plurality of multi-wire strands closed in one operation around the central strand, and a covering layer of 10 multi-wire strands closed around the intermediate layer. Each intermediate and covering layer of strands has a direction of lay opposite to that of the other layer of strands. The outside strands and core are always laid opposite each other, but the wires within each of these strands may be Lang lay, although Regular lay is preferred, particularly for the outside strands. The 10 outside strands may comprise from 7 to 26 wires and all of the strands are identical. However, in a preferred construction each of the outside strands consists of 19 wires.

Abstract: The false twist machine has a texturing part arranged below heat treatment zones in which three supply devices and a false twist device are superimposed and staggered from the back to the front in such a manner that in threading in of the thread into these devices turning about and overhead working processes of the operator are avoided. The thread paths formed by the threading in are placed one in front of the other in the sequence of the threading in process. A bobbin creel is movable to the texturing part and is equipped with a thread transfer device which transfers the threads coming from the individual creel bobbins into the vicinity of the first supply device. The winding device is arranged opposite the texturing part at a distance forming an operating alley and gives off the full bobbins to the outerside of the winding device opposite the operating alley. The empty bobbins can be moved from the machine end into a readiness reserve position.

Abstract: So as to be able to perform layer-wise SZ twisting of twisting elements of electric cables by means of a twisting plate with changing direction of rotation, the twisting plate is preceded at a distance by a twisting head which revolves with constant speed and direction of rotation. The twisting plate itself is provided with guide holes for guiding the twisting elements, which holes are arranged on at least two concentric pitch circles. Advantageously, the twisting plate has, besides a central guide hole, six guide holes on a first pitch circle and twelve guide holes on a second pitch circle. The distance between the twisting head and the twisting plate should be greater than the length of a section with the same twisting direction in the finished twisted material.

Abstract: This invention relates to the construction of the fuel nozzle guide of a turbine power plant and provides sealing while allowing relative movement between the fuel nozzle and combustion liner, and includes the judicious location of cooling passages that permit constant cooling and purging for preventing local hot spots resulting from unwanted flame holding.CROSS REFERENCEThis invention is related to the invention disclosed in copending patent application entitled FUEL NOZZLE GUIDE HEAT SHIELD FOR A GAS TURBINE ENGINE, filed by S. C. Peterson, L. W. Stevens and I. S. Tanrikut on even date and assigned to the same assignee of this application.

Abstract: Compression waves are formed by detonating a mixture of fuel and air confined within a chamber that has a constricted output opening. The mixture is ignited instantaneously throughout a peripheral region of the chamber opposite the output opening, and this region is shaped relative to the dimensions of the chamber and the output opening so that the burning of the mixture accelerates toward the output opening and inward from the peripheral region. This dynamically compresses and detonates the mixture to form a high pressure compression wave and direct it out of the output opening. The instantaneous ignition can be by plasma jets or flames injected into the ignition region from an ignition chamber adjacent to the detonation chamber. The device can directly transform the chemical energy of a fuel into a high pressure thrust directed against a relatively movable resistance to serve as a prime mover suitable for many tasks.

Abstract: The invention provides an internal-combustion engine comprising the combination of a two-cycle combustion chamber and a gas turbine and comprises a casing (49) houses a rotary wheel (1) having a row of blades (2) only on part of its periphery and a circular arc surface (8) formed on the remaining portion of the periphery and having the same radius as the path of travel of the forward blade ends. When the blade row (2) on the wheel (1) passes a discharge nozzle (31) of a combustion chamber (10), the charge is exploded in the combustion chamber, causing the resulting combustion gas to impinge directly on the blades of the row to drive the wheel.

Abstract: An underspeed actuator (18) is connected to the displacement control (17) for controlling the displacement of a variable displacement pump (11) of a hydrostatic transmission (10) in response to the pressure differential between low and high pressure control signals (A,B) wherein the pressure differential is directly proportional to the engine speed. An overspeed control valve means (41) is connected to the low and high pressure signals and decreases the pressure level of the high pressure signal received by the underspeed actuator (18) in response to the pressure differential exceeding a predetermined magnitude. This reduces the displacement of the variable displacement pump (11) thereby controlling the amount of engine overspeed caused by the hydrostatic transmission (10) driving the engine when the vehicle is descending a steep hill.

Abstract: A module for a double-acting four-cylinder Stirling engine includes a heater, two upper cylinder portions, two regenerator/cooler units which each have a flexibly interconnected regenerator and a cooler, two heater tube systems and two cooler tube systems. The upper cylinder portions and the regenerators extend into the heater, and are sealed and affixed thereto. The upper cylinder portions are connectible to two lower cylinder portions affixed to an engine block. The coolers are connectible to two lower cylinder portions affixed to the block. Each of the heater tube systems extends in the heater module from a respective upper cylinder portion to one of the regenerators of the engine; and, each of the cooler tube systems extends from a regenerator, through its respective cooler and through the cooler wall for connection to one of the lower cylinder portions.

Abstract: A thermochemical energy storage and mechanical energy converter system utzing a turbine. The system has a power or discharge phase, and a reactivate or charge phase. In the power phase ammonia gas is released by CaCl.sub.2.8NH.sub.3, expanded in a turbine and combined with ZnCl.sub.2 to form ZnCl.sub.2.NH.sub.3. In an example of the reactivate phase, ammonia gas is released by ZnCl.sub.2.NH.sub.3 and added to CaCl.sub.2.NH.sub.3 to form CaCl.sub.2.8NH.sub.3.

Abstract: Condensation system for use in a power plant. The condensate system includes side stream condenser defining therein first and second hot wells. Condensate is delivered from the first to second hot well through a condensate feed line. Condensate is introduced from the condensate feed line into a tank through a first spill-over line. Condensate is supplied from the second hot well to the power plant through a main condensate feed line. Condensate is introduced from the main condensate feed line into the tank through a second spill-over line. Actuator is operative in response to signal from a level detector detecting level of condensate in the first hot well, to regulate opening degree of a supplementary feed valve in the supplementary feed line, to close one of first and second spill-over valves in the first and second spill-over lines, respectively, and to open the other spill-over valve.

Abstract: Combustion apparatus for gas turbine engines has a combustion chamber (4,5) provided with fuel/air mixture injection devices (11) in an upstream end wall (9,10) of the chamber. Each device has a passage (17) having inlets (12,15) for air and fuel which mix in the passage and discharge through an outlet (19) initially in a direction along the adjacent surface of said chamber end wall (9,10). The latter wall has a secondary inlet (20) admitting a stream of air transversely to the flow from the passage outlet (19) thereby to generate an oblique flow (19A) having a component movement (Y) away from the combustion chamber wall. This directs inflammable mixture away from the latter wall and simultaneously assists mixing of air and fuel. A cooling film (24,24A) passing along the chamber wall passes over the passage wall (16) and, in certain examples, between the oblique flow and the chamber wall.

Abstract: The support has a filling of insulating concrete which fills the space between the foundation slab and sand support layer. A cold sink formed of horizontal pipes laid in the main wind direction is encased in a middle region of the support. An impermeable film is placed over the cold sink and about the filing to prevent entry of moisture into the filling.

Abstract: A coolant replenishing system for cooling the superconducting field winding of a machine, illustratively a turbo-generator. The machine is provided with a rotating antechamber in which is disposed a coolant in liquid and gaseous phases. Liquid coolant is delivered to the antechamber from a supply tank by a coolant supply line. The discharge opening of the coolant supply line in the antechamber is oriented away from the axis of rotation of the machine, and disposed at a predetermined radius with respect to the axis so that the input pressure of the coolant at the opening of the coolant feed line is in equilibrium with the pressure of the liquid coolant in the rotating antechamber.

Abstract: An apparatus for condensing water vapor and vaporized solvent from process exhaust gas, such as from an industrial solvent drying oven process is described. The apparatus includes two parallel condenser assemblies which are alternately shifted between condensing and defrost modes. One of the assemblies is shifted into the condensing mode while the other is in the defrost mode and the other is shifted into the condensing mode while the one is in the defrost mode. When in the condensing mode, water vapor is condensed from the process exhaust gas in a water condenser such as a counterflow heat exchanger and solvent vapor is condensed therefrom by a solvent condenser such as a refrigeration coil positioned within a cold zone of the assembly. When in the defrost mode, a recirculating defrost loop is provided through which gas is circulated and heated for defrost purposes. Following defrosting, the defrosted condenser assembly is pre-cooled prior to shifting from the defrost mode back to the condensing mode.

Abstract: The invention is an improved apparatus for the removal of sodium carbonate from cyanide plating baths. The method involves the precipitation of sodium carbonate by the effect of cooling the cyanide plating bath liquid. A container is submerged in the solution with the container opening extending above the plating bath solution level. The container is filled with dry ice and water which produces a temperature of approximately zero degrees centigrade inside of the container. The solution adjacent to the exterior of the container is cooled so that excess sodium carbonate is precipitated as a crystalline deposit. After a desired interval, the container is removed with the encrustation of sodium carbonate for disposal.

Abstract: A device at a heating or cooling unit such as, for example, a heat pump where the energy carrier is a substance, the volume of which varies substantially with the temperature, for example freon.At such a unit, which comprises condenser (1,2), evaporator (1,2) and compressor (3), and where the compressor is driven by an electric motor (18), according to the invention a tank (21) is provided to contain said substance (22) and is connected to the suction side (19) and, respectively, pressure side (20) of the compressor (3) by two respective conduits (23,24), each of which is provided with an electrically controlled valve (25,26) for closing and, respectively, opening the conduit in question.

Abstract: A cylindrical convection heat dissipation tower is shown having a top and bottom cap with wound heat exchange coils dispersed within the tower. Cooling fluid is introduced gradually at the bottom of the tower while warmer cooling fluid is discharged from the top of the tower. The tower utilizes "stacking" principles to gradually lower the temperature of the refrigerant fluids entering at the top of the tower, passing downwardly through the coils, and rising upwardly through an insulated portion of that coil, exiting from the top of the tower.

Abstract: A transport refrigeration machine for conditioning the interior of a trailer comprising a frame, a refrigerant compressor, a condenser assembly, and an evaporator assembly. The evaporator assembly includes a housing, a heat exchanger extending within the housing for conducting the refrigerant fluid therethrough, and heat exchanger support apparatus connecting the heat exchanger to the frame to support the heat exchanger independently of the housing. The evaporator assembly further comprises a blower unit extending within the housing to circulate air therethrough, and blower unit support apparatus connecting the blower unit to the frame to support the blower unit independently of the housing.

Abstract: In connection with an arrangement in an ice machine which comprises a series of substantially parallel vertically arranged ice freezing elements which during the ice freezing phase are supplied with water, and which are provided with conduits for transport of freezing medium or thawing medium, as well as vessels arranged below the ice freezing elements and adapted for collecting surplus water, and an ice crusher box for crushing and delivery of finished produced ice, there is between the bottom of the ice freezing elements and the collecting vessels for water and the ice crusher box provided a pivotable baffle means which effectively serves to separate ice and water during the various steps of the ice producing process. During the ice freezing phase the baffle means adopts an inclined position which covers the ice collecting vessel, so as to pass the surplus water to the water collecting vessels via a stationary inclined guiding plate having a water pervious field.

Abstract: A system for controlling the temperature of the drink cooling coil of a drink cooling system is disclosed. The system is a water-cooled heat-accumulating type drink cooling system having a water tank filled with water, a cooler in said tank, a drink cooling coil formed in an intermediate portion of a drink supply pipeline and an electric water agitator. The cooler is operated to cool the water in the tank by forming an ice bank around the cooler to accumulate heat in the tank, in order to cool a drink in the cooling coil. An agitator stopping means is provided which senses the temperature of the water in the tank and stops the agitator when said temperature is about 0.degree. C., so that an over-cooling of water in the tank occurs generally only at the cooler, and not at the cooling coil, thereby preventing ice from forming inside the cooling coil.

Abstract: The specification discloses a refrigeration apparatus suitable for cooling water in an air conditioning system, the apparatus having a heat exchanger in which certain heat exchanger tubes are omitted to greatly enhance the overall performance of the apparatus.This is a continuation of application Ser. No. 118,885, filed Feb. 6, 1980, now abandoned.

Abstract: A universal joint is composed of first and second yokes each having two through holes, a hollow rectangular parallelepiped support member positioned to cooperate with the first and second yokes, the support member having five rectangular plate sections leaving a rectangular opening, and formed with four through holes, the adjacent rectangular plate sections being completely integral with each other at connecting edges thereof, and pins insertable into the through holes of the yokes and of the support member so as to connect the yokes with the support member, thereby producing a universal joint light in weight and high in torsional strength.

Abstract: A liquid level regulator for the solvent of a dry cleaning machine comprises a box-like body mounted within a cleaning chamber of the machine and having holes to allow the solvent to penetrate thereinto, wherein the liquid is calmed and forms a substantially even level. This level is detected in order to control the same both within the machine chamber and within the box-like body.

Abstract: A locking device for use on suitcases comprising two keepers, each having a lateral notch and with an outermost surface inclined to form a cam, two lock-staples inside of which are engaged the keepers, latch hooks pivotally mounted in the lock-staples, which hooks are adapted to engage in the notches provided in the keepers under the action of elastic members when the suitcase is in its closed position, the latch hooks being connected to an opening control bar and to a locking bar, both bars being mounted for axial sliding movement inside a housing of the suitcase.

Abstract: The improved guard plate of this invention is used to protect the cylinder of a lock. It includes a relatively flat body, attached to the door in the vicinity of the cylinder, and a disc rotatably mounted between the door and the flat body. In an open position, an opening in the disc permits access to the cylinder; and, in the closed position, the solid portions of the disc do not permit access to the cylinder. In addition, rotatable fingers are provided so as to lock the rotatable discs in either the open or closed position.

Abstract: A ring former and cutoff utilizes a continuous ring former which causes the stock to assume the form of a helix having a number of turns. The leading end of the helix after forming a plurality of free turns passes through a drive roll set, through a stationary cutoff die and into a sizing hoop of larger diameter than those in the turns of the helix. The free end of the helix to expand within the sizing hoop. Sensors detect the expansion to energize the cutoff at the die to sever a turn of the helix with the momentary halt of the stock at the die causing the helix between the cutoff and former to expand or unwind. When the severed end of the helix is removed or falls free, the drive roll set again drives the new leading end of the helix through the cutoff die at a speed sufficient to return or wind the helix to its original condition.

Abstract: The shot peening apparatus for shot peening the surface of a workpiece has a gravity shot distribution subassembly which includes deflectors which utilize the kinetic energy in the falling shot to effect a substantially uniform distribution of shot into a conduit for conducting the shot at gravitational velocity to an elongated nozzle. Associated with the nozzle is a plenum communicating with the nozzle and containing a gaseous fluid under a relatively low static pressure for accelerating the shot out of said nozzle at higher than gravitational velocity for impact against a workpiece.

Abstract: A hydraulic press elastic stamping tool having a tool body with a recess wherein is situated a flat elastic diaphragm whose flange makes contact with the tool body, forming a closed chamber. That chamber communicates with a source of working fluid under pressure through ducts in the tool body. The end portions of the diaphragm flange form, in conjunction with the main body of the diaphragm, an aperture closed at one end and dimensioned several times smaller than the thickness of the diaphragm. The aperture, in cross section thereof, is smoothly curved with respect to the plane of the diaphragm toward the bottom of the recess and the closed end of the aperture is situated in the zone which is not subjected to tension strain when working fluid is delivered under pressure into the chamber.

Abstract: A mandrel for a blind rivet is made by first forming a mandrel blank from wire stock in a series of cold heading operations which include forming an enlarged head at one end of an elongate stem, and then scraping material from the peripheral surface of part of the head adjacent to the stem and moving the material in a direction away from the stem so as to leave a core and to form a circumferential flange-like boss from the scraped material. The mandrel blank thus produced is then subjected to a rolling operation in which the mandrel blank is rolled between contoured mandrel-rolling dies and thereby formed into a finished mandrel.

Abstract: A rolling process wherein a pair of working rolls are driven at different peripheral velocities so that the peripheral velocity ratio may be varied, and the peripheral velocity ratio is so controlled that the rolling torque of each of the working rolls may be within a maximum tolerable torque which the working roll may transmit, thereby reducing the rolling force.

Abstract: In an indirect extrusion press of the type wherein a die stem is connected to a press axis on the rear end surface of a press platen and extends towards a container, an intermediate frame type indirect extrusion press including an intermediate frame movably interposed between the press platen and the container in the direction of the press axis, encompassing the die stem and equipped with a guide section in its longitudinal direction, a driving device for moving the intermediate frame in the direction of the press axis and a guide mechanism placed between the intermediate frame and press structures such as a press bed, a column and the like and guiding the intermediate frame in the direction parallel to the direction of the press axis.

Abstract: A thin sheet having a low rigidity is drawn while being depressed over the radiused corner of a die by elastic force to obtain a formed article whose sidewall part and flange part have no wrinkles. The force is applied through an elastic rubber provided around the punch and having an outside diameter larger than the inside diameter of the die cavity. The hardness of rubber is preferably approximately 70 to 85 in accordance with ASTM D 2240 Durometer A. A laminate not more than about 200 .mu.m in thickness and consisting of a thermoplastic resin film, aluminum foil and a heat-sealable resin film is drawn into a formed article or a container which is light in weight and suitable for containing foods, for instance.

Abstract: A thin sheet having a low rigidity is drawn while being depressed over the radiused corner of a die by elastic force or hydrostatic force to obtain a formed article whose sidewall part and flange part have no wrinkles. The force is applied through an annular rigid body on which elastic is exerted. The hardness of the rubber is preferably approximately 70 to 85 in accordance with ASTM D 2240 Durometer A. A laminate not more than about 200 .mu.m in thickness and consisting of a thermoplastic resin film, aluminum foil and a heat-sealable resin film is drawn into a formed article or a container which is light in weight and suitable for containing foods, for instance.

Abstract: A web bending fixture to bend lithographic plates used in web offset printing and production. Precise bends are created by a precision machine tool fixture. The fixture utilizes continuously supported eccentric camming members, one on each end of the fixture, each supported by a plurality of split bearings within which the camming members rotate. After the lithographic plate is precisely aligned with unique registration means and immobilized, the camming members, are moved into position and, rotating within the bearings, form the leading and trailing edges of the plate around precisely positioned and fixed anvils.

Abstract: A tool for crimping a connector sleeve onto the ends of cable strands or the like for joining the strands together consists of an anvil arm having a V-shaped notch therein pivotally mounted relative to a base for its notch to be swung into cooperative opposed relation with a V-shaped notch in a die block on the base for crimping a connector sleeve that is placed through the die block notch.The size of the crimp opening, defined by the two notches in cooperative opposed relation, is determined solely by the size of the notch in the die block. The notch in the anvil arm is the same for all crimp opening sizes. The die block has shoulder surfaces that are engaged by end portions of the walls of the anvil arm notch to bring the two notches into precise operative alignment and to stop relative movement of the notches together when they are in the spaced relation that will produce the size crimp desired.

Abstract: A wire drawing die and method for making the same in which a blank having a cylindrical core of a hard, wear-resistant material located randomly in the blank is initially attached to a circular metal plate having a concentric central opening, thus forming an assembly with the core being concentric to both the plate and the opening. A metal casing is provided having a cylindrical cavity proportioned to accommodate the plate with a close fit. A first brazing disc is placed on the cavity bottom. The assembly is inserted in the case cavity over the first brazing disc with the blank facing either toward the top or bottom of the cavity. Powder metal may be placed between the blank and the cavity. A second brazing disc is then placed over the assembly and the powder metal. A metal plug is provided with its outside diameter proportioned for a close fit with the case cavity and may have an interior cavity proportioned to accommodate the blank.

Abstract: Apparatus for calibrating a meter prover is disclosed including a chamber taking the form of a substantially perfect right circular cylinder, a piston adapted for rectilinear movement within said cylinder between a first position and a second position, means for moving the piston from its first position to its second position, and an encoder coupled to the piston for providing an output signal indicative of the movement of the piston and thus the volume of fluid displaced by that movement of the piston. The calibrating apparatus comprises an antenna electromagnetic energy to the antenna whereby electromagnetic waves are emanated into the chamber. A detector is coupled to the antenna to detect electromagnetic energy leaving the chamber and is in turn coupled to a resonant detector in the form of a cathode ray tube, whereby a minimum of the level of the electromagnetic energy may be determined.

Abstract: An apparatus for field testing anemometers which utilizes an uncalibrated industrial hand blower powered by a constant pre-determined voltage is shown and described.A method of calibration against a standard anemometer and a method of field testing anemometers by use of an apparatus using an industrial hand blower are described.

Abstract: Disclosed are a method of and an apparatus for determining entrained gas content in a liquid, especially a liquid synthetic-resin component adapted to form a foamed or cellular synthetic-resin body. Pressure pulses are applied to the liquid and pressure oscillations therein are detected, the amplitude .DELTA.p and/or the phase position of a peak being detected and evaluated to give the gas content. The determination may be used to control the addition of the gas to the liquid and/or can be displayed to permit operator control of the system.

Abstract: A remotely controlled switching apparatus for selectively controlling the connection of a downhole device to a power cable which carries power to a downhole motor includes a thermostatic switch connected between the device and the cable, and a heater for producing sufficient heat to raise the temperature of the switch above its operating temperature. The heater is operated by a switching signal impressed upon the cable by a control and readout unit on the surface. The apparatus may be used to disconnect the device from the cable for a predetermined period of time to enable high voltage testing. After the predetermined period of time, the apparatus automatically reconnects the device to the cable.

Abstract: A method of determining the depth of occurrence of a chemically aggressive bed in the course of drilling a well with the use of a drilling mud, wherein there is measured preliminarily the value and direction of the redox potential of the drilling mud injected into the well, whereupon the walls of the well are stripped of the mud cake and an additional portion of the drilling mud featuring its redox potential differing as to the value and direction from the redox potential of the drilling mud situated in the well, is prepared.

Abstract: A limpness detector for examining documents at high speed. A pair of rollers having star-like cross-sectional configurations comprised of substantially V-shaped projections and interspaced V-shaped grooves are cooperatively arranged so that the projections of one of said rollers at least partially enter into the grooves of the other. The rollers are rotated in a synchronous manner. One swingably mounted roller is preferably yieldably urged toward the other. Documents to be examined are fed between the rollers and, depending upon their relative limpness or stiffness, serve to "lift" the swingable roller such that the amount of displacement between the rollers is a function of document limpness. Sensor means is utilized to detect the amount of displacement. Threshold detection circuitry is provided to facilitate calssification of the documents into limp, moderately stiff and stiff documents, for example. The apparatus may also be utilized to detect the presence of overlapping and/or multiply-fed documents.

Abstract: A method and apparatus for measuring the amount of mire and mud in a suction dredge hopper 2, which mire and mud is a constituent of a fluidized mixture. An acoustic level gauge 16 measured the position of the upper surface 3 of the mixture and a plumb weight 7 measures the position of the lower limit of the mixture defined by the top of a sand layer 4. A plurality of differential pressure responsive density measuring devices P measure the density of mire at different levels. From these measured valves the total amount of mud and mire is determined.

Abstract: A method and apparatus for measuring the height of the density layer in a material bed layered according to densities, such as in a jigging machine operation, utilizes a free-floating measuring body having a transmitter means embedded therein and a probe mechanism for monitoring the relative position of the body in the material bed. The measuring body is made of a material having a density equal to the relative densities of materials forming the separating line between two density levels and is able to move with the materials during the grading process. The probe mechanism is housed in a guide tube which extends in the direction of the density gradient through the material bed.

Abstract: A signal varying over a wide dynamic range from a source (10) is input to a summing amplifier (12) along with the output of an adjustable reference generator (14). An error signal output of the summing amplifier (12), a subtraction of the output of the reference generator (14) from the input signal source (10), is applied to a rate network consisting of a capacitor (16) and a resistor (18), with the latter in a feedback loop for an amplifier (20). The output of the reference generator (14) is adjusted to maintain the error signal within the operating limits of the summing amplifier (12) by monitoring the output of the amplifier. During the time interval when the adjustment of the generator (14) is made, a compensating network (24) maintains the output of the amplifier (20) at the level previous to the adjustment interval. This provides a continuous output voltage at a terminal (22) that varies over an expanded range with reference to the input signal.

Abstract: An angular rate instrument adapted for mounting to a given object for measuring the rate of turn of the latter is disclosed herein. This instrument utilizes an angular accelerometer to sense angular acceleration to which the instrument is subjected and a circuit for integrating the difference between this signal and a reference signal to produce an integrated output signal corresponding to the rate of turn of the object. The angular rate instrument also utilizes a null circuit for producing the reference signal in response to and dependent on low frequency error signals which appear at the output of the signal integrating circuit. The null circuit uses a capacitor to provide the reference signal and means for maintaining the charge on the capacitor during power interruptions so as to prevent losing the reference signal as a result of such interruptions.

Abstract: A deceleration sensor comprising a magnetically soft core having an electrical coil wound thereon, a permanent magnet, a spring, and a ferromagnetic member adapted to be displaced against the action of the spring in response to deceleration to thereby change the magnetic flux acting on the magnetically soft core. A pulse voltage is applied to one end of the electrical coil and a corresponding voltage drop develops across a resistor connected to the other end of the coil with a delay corresponding to a deceleration. This delay may be represented in the form of an analog voltage or digital code.

Abstract: A pulsed through-transmission ultrasonic non-destructive inspection of the internal structure in a tire wall is effected. The transmitted acoustic signals preferably have a frequency of at least 40 KHz, are transduced to electrical form, amplified with a relatively long time constant AGC, rectified and integrated during only the initial or leading edge portions of each pulse or burst. The resulting integrated analog signal values thus provided have relative magnitudes which may be displayed or otherwise processed to detect structural anomalies within the tire wall. If plural acoustic transmitters are utilized, they are preferably multiplexed such that only a single transducer is activated at a given time. Air leaks from the pressurized tire under test are also detected by detecting ultrasonic signals generated by escaping air.

Abstract: A pulse-echo device for obtaining information about a flowing fluid in which a transducer unit comprises an electrically-shielded transducer with a lens for three-dimensionally focusing energy waves, which unit can be inserted into a hole extending through the sidewall of a pipe so that the energy waves focused by the lens are directed across the flow through the pipe. The transducer is surrounded by two electrically-grounded shields which are insulated from each other and separately grounded to isolated the transducer from stray electrical pulses.