Abstract: A venting slide fastener stringer for use on a cushion, a pillow, etc. has a warp-knit stringer tape including a pair of laterally spaced, elongate webs with a wale-free region therebetween, and a connecting thread or threads having portions laid in opposed marginal wales in the webs and substantially parallel portions extending transversely across the wale-free region to interconnect the webs, thereby providing a plurality of vent holes longitudinally along the wale-free region. The opposed marginal wales are more rigid than other wales in the webs, and the connecting thread or threads are more rigid than foundation threads making up the webs. A row of coupling elements is mounted on one of the webs remotely from the wale-free region.

Abstract: A flat bed knitting machine comprising a flat elongate bed on which is retained a plurality of parallel, latchable, needles equally spaced along the length of the bed and each movable relative to the bed in a direction lengthwise of the needles and transverse of the bed length, a carriage slidably mounted on the bed for movement transversely of the needles, and a needle-engaging cam plate releasably located in a recess in an upper surface of the carriage and retained in the recess, the carriage having a handle gripped by the user of the machine to transverse the carriage back and forth along the length of the bed.

Abstract: Very efficient and economical treatment of textile material in a continuous loop can be carried out in an improved circular treating passageway comprised of a portion for allowing the transient residence of the textile material while transferring in an approximately horizontal position, but in a zigzag form, in a treating liquor and another portion for moving the textile material through a rapid flow of the treating liquid, wherein the residence portion is inclined so that the depth of the treating liquor increases gradually in the advancing direction of the textile material and a baffle plate is provided so that the textile material transferred with the rapid flow of the treating liquor strikes against the baffle plate at a high speed.

Abstract: Apparatus for the application of liquids to moving material, such as patterned application of dyes to moving textile material, including a liquid applicator positioned above the material path of travel for continuously discharging liquid in a row of plural streams downwardly onto the material, means for selectively deflecting selected of the continuously flowing streams in accordance with a pattern control device, and collection means for receiving the deflected liquid to prevent its contact with the moving material. The apparatus includes a novel flow controller to measure the flow rate of the plural streams from a dye manifold and in response thereto to adjust the flow of dye liquid from the manifold, by opening and closing a valve located in the return conduit from the dye manifold to the dye supply tank.

Abstract: Process and apparatus for the cold rolling of ferrous metal or nonferrous metal strip, e.g. steel or aluminum strip, in which the strip is passed at a high rate through a multiplicity of cold rolling stands and a coolant is dispensed from nozzles directed against the rolls or the band in the region of the rolling gaps. According to the invention, the planarity of the strip is measured immediately downstream (in the direction of strip movement) of the last rolling stand and deviations from planarity are determined and converted into control signals. The planarity measurement signal is compared with a deviation-maximum signal processor until the measured deviation reaches a first threshold within the range to maximum. Only the coolant spray from the nozzles of the last stand are controlled in a planarity-restoring sense. When the measured deviation exceeds this threshold at least the nozzles of the penultimate stand are controlled.

Abstract: A press operating with hydraulic pressure comprises a pair of relatively movable components (8, 11) which during a pressing operation carry out a relative movement which is sensed. By use of the sensed relative movement a control signal is generated which is used for regulating the hydraulic pressure so that this is caused to vary with the relative movement according to a certain functional relationship. For generating the control signal a manually programmable electrical function generator (23) is provided, preferably a panel (29) comprising plug contacts (34), on which a plurality of pairwise associated pressure and movement values, constituting electrically and visually readable points in the desired functional relationship, can be set up.

Abstract: Diagonal rolls for stretching hollows are of a truncated-cone-like configuration, each with two shoulders and a recess in between, for cooperation with a cylindrical mandrel rod in order to obtain a two-stages-in-one reduction in wall thickness; the shoulders merge in smoothing surfaces.

Abstract: A two-high rolling stand (1) for bar and/or wire rolling mill. The rolling stand (1) is characterized in that a roll package, which substantially comprises a pair of rolls (13) with their axial directions in parallel and necessary bearing devices (14) with bearings and bearing housings for supporting said rolls (13), is located between two side plates (16) or the like, which are in parallel with each other, and of which each plate (16) is arranged with its main extension plane (17) substantially in parallel with a plane through the centre lines of the rolls (13). The roll pair further is characterized in that the side plates (16) on opposed sides of said roll package are arranged to take up roll forces via two end members (18), and that the roll package is arranged so as directly and/or indirectly to rest against the end members (18).A further characterizing feature is that said end members (18) are arranged so as to permit adjustment of the roll distance, so-called roll gap adjustment.

Abstract: This invention relates to a method of plate rolling, wherein, in plate rolling, a value corresponding to the difference in width between the center and the end portions of a material to be rolled is estimated and calculated, sizing rolling is carried out by subjecting the material to plate rolling of plan view pattern control only at the opposite end portions thereof with a difference in gap between upper and lower work rolls in the axial direction thereof corresponding to said value, and to an equipment for use in said method.

Abstract: A method and machine for flanging tube ends, the machine having pivotal inner (22) and outer (30) forming tools which flange one end of a thin metal tube (21) specifically to form a rotatable drum for laundry machines. The tools are actuated by hydraulic rams (A), (B) and (C) and the rams are actuated at different rates of movement under the control of a computer so that as forming is effected by moving both sets of tools from dispositions on a cylinder to dispositions on a disc the inner forming tools (22) have their pivot points 24 changed relative to pivot points (31) of the outer forming tools (30) resulting in relative sliding between inner and outer forming tools. The flange (51) formed has two sets of ribs, one set extending outwardly away from the tube (21) and the other set extending inwardly within the tube (21) and parts of the flange between adjacent ribs lying in a plane substantially at right angles to the wall of the tube (21).

Abstract: A forming machine to form a sheet of metal to an "S" bend having clamps to clamp the sheet metal, one of the clamps having an anvil about which the sheet metal is folded by a rotatable forming bar to form a first channel and partially form a second channel in the sheet metal after which the rotatable bar is moved clear and a nose on a further former further folds the second channel facing in the opposite direction to the first channel.

Abstract: A transducer coupling member for use with systems for detecting inhomogeneities in fluids flowing in a conduit. A first portion of the member is acoustically coupled to the conduit wall. An electromechanical transducer is mounted upon another portion. These two portions are partially acoustically coupled. The composite system forms a bandpass filter which eliminates frequencies and modes of oscillation which travel largely in the conduit, thus preventing the system from being rendered insensitive to inhomogeneities. The bandpass automatically adjusts to accommodate a variety of conduits.

Abstract: A rotational angle detecting apparatus includes a rotating member secured to one end of the rotating shaft of an object to be detected for rotation along with the rotating shaft which is rotatable in response to a change in a physical quantity. The apparatus further includes a non-rotating member fixedly positioned opposite to the rotating member, a magnetic field generating source disposed on one of the rotating member and the non-rotating member to generate a magnetic field, and a magnetic sensing element disposed on the other of the rotating member and the non-rotating member to generate an output signal which varies in dependence on the direction of the magnetic field.

Abstract: A method and apparatus is disclosed for monitoring flow conditions in boreholes or the like wherein a test interval is defined by a packer system and contains a substantially incompressible fluid or liquid making it difficult to conduct measurements from the surface. According to the method and apparatus of the present invention, a variable volume device is arranged within the test interval along with a suitable flow monitor which may comprise the variable volume device itself, the variable volume device being operable to limit pressure variation within the test interval and thereby minimize compliance effects over a predetermined test period. Preferably, the variable volume device is coupled with a pressure monitor for maintaining substantially constant pressure in the test interval. In different embodiments, an initial pressure differential is established between the test interval and the surrounding formation by operation of the same variable volume device or by means of a second variable volume device.

Abstract: A method for testing earth formations informs the operator of the density of the formation fluid being produced before it reaches the surface. In the method, a bypass sub is secured to the drill string. The bypass sub has a bore for receiving a wireline tool that has sensing instruments. The wireline tool also has arms that will shift a sleeve to open and close the bypass sub. The wireline tool has a density measuring device for measuring the density of the formation fluid and providing a concurrent surface indication. A reversing valve is located above the bypass sub and is of a type that provides a port for reverse circulation while the wireline tool is still downhole. Preferably, the reversing valve is shifted by the wireline tool to the open position.

Abstract: Capacitance measuring apparatus comprises a variable capacitor VC and a reference capacitor FC. Circuits D, ID, are provided for generating a periodic waveform for application directly to the variable capacitor, and in inverted form to the reference capacitor. Switches means SM are operated by control logic CL to connect the two capacitors in sequence to the input of an integrating amplifier IA, the output of which is applied to a comparator CM to which is also applied a reference level. The output of the comparator controls the control logic. Output of the control logic is converted to an indication of the capacitance of the variable capacitor relative to that of the reference capacitor.

Abstract: In an ultrasonic diagnostic equipment which irradiates a subject with ultrasonic waves and receives reflected waves responsive thereto so as to provide a tomogram of the subject on the basis of the received signals, two tap-changing type phased arrays having different focal sections are alternately operated during a period of the reception of the reflected waves, and while one of the phased arrays is being operated, the tap changing of the other phased array for altering the focal section is made. In spite of reduced numbers of high-class switches and phased arrays used, spike noise due to the changes-over of switches during the dynamic focusing are prevented.

Abstract: A pressure coupled ultrasonic waveguide is provided to which one end may be attached a transducer and at the other end a high temperature material for continuous ultrasonic testing of the material. The ultrasonic signal is coupled from the waveguide into the material through a thin, dry copper foil.

Abstract: Driver bar assembly for vibration test apparatus, comprising a bar element and a retainer element separably connected thereto; the bar element having a normally vertically disposed base attachable to a pivotally mounted shaker head and a normally horizontally disposed flange adapted to lie in a common plane with and spaced from a slip plate to be driven by the shaker head; the retainer element having a first bracket in which the bar element flange is bracketable, and a second bracket in which the slip plate is bracketable opposite the bar element flange, whereby the flange and slip plate spacing is bridged in vibration transmitting relation between the shaker head and the slip plate; the retainer element being separable from the slip plate and the bar element flange without relative movement of the slip plate and shaker head, the bar element and shaker head being freely angularly movable relative to the slip plate in the separated condition of the retainer element and the bar element.

Abstract: A capacitive pressure transducer 10 with an analog output voltage which varies linearly as a function of sensed pressure is provided. A capacitive pressure sensor C.sub.x provides a pressure variable capacitance that determines the frequency of a sensor oscillator 11. The oscillator frequency is combined with a reference frequency by a pair of D-type flip-flops 18 and 19 to provide a resultant signal having a duty cycle related to the sensed pressure. The resultant signal is integrated to provide a first analog signal as an input to a controllable gain amplifier 24 which receives gain control information from a non-linear gain control circuit 40 that receives an analog control signal as an input. The analog control signal varies as a function of sensed pressure in an opposite manner to said first analog signal. Said non-linear circuit provides for non-linearly varying the gain of amplifier 24 as a function of sensed pressure. Preferably the non-linear circuit 40 includes temperature compensating diodes 47.

Abstract: The distance-frequency transducer includes a capacitor whose capacitance changes as a function of movement of one electrode relative to the other. The movement is controlled by the parameter to be measured, as, for example, the pressure in a pressure pickup. The capacitance determines the frequency of an RC oscillator. The output frequency of the oscillator can be calibrated directly in pressure units.

Abstract: A measuring instrument for studying the tensile characteristics of hair or other fibre samples is provided with elements whereby it is possible successively to carry out measurements on a series of samples automatically without intervention by an operator. A stack of pairs of blocks (12A and 12B) is mounted in a loader (23) with a sample (21) connected between the blocks of each pair. The sample blocks are displaceable as a pair from the bottom of the loader across a plate to be engaged by relatively movable clamps (11 and 19) by means of which the sample carried between the blocks can be stretched. A dynamometer (5) measures the tension for a predetermined elongation and a sensor (54) cooperating with an anvil (25) senses changes in transverse dimensions of the sample.

Abstract: A fluid conduit with a rectangular cross-section is divided into two parallel conduits. A vortex generating rod is disposed perpendicularly to the flow direction in one of the conduits. An ultrasonic wave is directed perpendicularly across the conduit to detect the Karman vortex streets. A sound absorbing material is located along the portion of the conduit wall where the ultrasonic waves exist for preventing the formation of standing waves.

Abstract: A flow rate meter is proposed which serves to ascertain the quantity of a flowing medium, in particular the quantity of air aspirated via an air intake tube by an internal combustion engine. The flow rate meter includes a measuring body which is pivotable counter to a restoring force about a bearing shaft supported in the housing in accordance with the quantity of the medium flowing therethrough. The flow rate meter further includes a damping body which is likewise pivotable about the bearing shaft and defines a damping chamber in the form of a movable wall, with respect to the flow conduit. The measuring body and the damping body are coupled rigidly to one another by means of crosspieces. The invention comprehends embodiments wherein either the damping body or the measuring body is directly connected with a hub held in a rotationally fixed manner on the bearing shaft.

Abstract: The disclosed sampling device has a gas suction tube through which gas with a high content of dust is sucked into the sampling device so as to cleanse the gas with water in the sampling device before analyzing the gas. At least one air nozzle is provided in the gas suction tube in such a manner that the air nozzle faces the inside surface of the gas suction tube wall and is directed toward the inlet opening of the gas suction tube, so that dust and other deposits sedimented on the inside surface of the gas suction tube is cleansed by air jets ejected from the air nozzle.

Abstract: A process and device using back-diffusion for sampling a gas from an environment containing an aerosol of tramp material. The device cleans the tramp material from a barrier by the flow of a purge gas. The purge gas flow prevents diffusion of the tramp material through ports in the barrier through which the sample gas diffuses against purge gas flow. The purge gas continuously cleans the barrier, retards tramp material diffusion, and gathers and transports the sample gas.

Abstract: A sampling tube arrangement of the type having elongated sampling tubes with closing caps made of elastic plastic material is disclosed in which a plurality of closing caps are joined one to another through severable webs connecting adjacent closing caps. Each cap is provided with a plug-in connection comprising a male part on one side and a female part on the other side to provide a reconnecting mechanism for reconnecting the closed tubes after the sampling has been completed.

Abstract: A shielding bladder for the venting arrangement of a linear actuator having a housing, a reciprocable member disposed therein for linear reciprocable movement therethrough, and a venting arrangement in the housing for communicative flow of ambient air into and out of the housing during operation. The bladder is a sleeve sealably affixed exteriorly to the housing enclosing the venting arrangement and defining a chamber between the sleeve and housing that contains a volume of air for contractionally expelling the air into the housing in response to increases in its volumetric capacity resulting upon outward reciprocation of the reciprocating member and expansionally receiving air from the housing in response to decreases in its volumetric capacity upon inward reciprocation of the reciprocating member.

Abstract: A multispeed constant mesh gear transmission includes an input shaft together with first, second and third intermediate shafts arranged in a diamond or cruciform configuration together with an output shaft having an axis of rotation lying in a plane including the input shaft and the third intermediate shaft. In two different embodiments each of the three intermediate shafts include two multiplate fluid actuatable clutches shiftable under load. A plurality of gear trains selectively drive an output shaft at six different rotative speed ratios with respect to the input shaft in one direction of rotation of the output shaft and at three different speed ratios in the opposite or reverse direction of rotation of the output shaft. In one embodiment a total of six clutches and fourteen gears provide for the speed ratios and in a second embodiment a total of twelve gears and six clutches provide for the six forward and three reverse speed ratios.

Abstract: An electrically operated roller door driving mechanism for operating a roller door comprising a reversible electrical motor fixedly mounted to one of the roller door supporting drum wheels and housed within the core of the roller door curtain, the motor and drum wheel being arranged to rotate simultaneously, and a ring gear operatively associated with said motor via a reduction gear mechanism, the ring gear being capable of being held stationary with respect to the rotating drum wheel but also being capable of rotating in unison with the drum wheel to thereby enable the roller door to be manually opened and closed in the event of a motor malfunction or power failure.

Abstract: For a vehicle equipped with a pair of driving engines and a torque converter having a capacity sufficient to absorb the combined peak torque of the engines at combined peak torque speed, a dual engine drive including a planetary gear set operative to provide direct drive between the engines and the torque converter when both engines are operating and to provide gear reduction between the engines and the torque converter when only one engine is operating. The gear ratio of the planetary set is preselected to reduce the input speed to the torque converter while increasing the input torque to the torque converter so that the output of the one remaining engine is more efficiently matched to the torque converter.

Abstract: A system for driving a motor vehicle with a infinitely variable belt gear is provided with an engine transversely positioned to the longitudinal direction of the vehicle. First and second drive-cone pulleys are provided for transmitting the rotational force of the engine. A clutch couples the engine with the drive-cone pulleys. A V-belt or chain drivingly connects the first and second output cone pulleys with the first and second drive-cone pulleys. A planetary gear drive with a sun gear, a ring gear, and a planetary gear carrier carrying planet gears is driven by the first and second output cone pulleys. A differential gear for driving the axles of the vehicle is coaxially positioned to the planetary gear with a drive gear coupling the differential gear with the planetary gear.

Abstract: An infinitely variable power transmission having three power transmitting shafts (14,16,25) differentially rotatable around a common axis (20) and connected together by at least one bevel wheel (12) rotatable around a nutating axis (22). The nutating axis (22) intersects the common axis (20) and is carried by the first shaft (16) around the common axis (20). The second shaft (25) has a bevel gear (26) connecting it to the wheel (12) perimeter. The wheel (12) sits on a convex segment (13) of the third shaft (14) making a single traction point (52) in the plane defined by the axes (20,22). Power may be applied to any two of the shafts with the speed of the power output by the third being controlled by the location of the traction point (52). The traction point (52) may be moved within the plane so that for any single engine speed, the speed of the power output shaft may be infinitely varied in a specific range.

Abstract: A final drive assembly for a vehicle comprising a housing, an input pinion gear rotatably supported by the housing, a sun gear shaft rotatably supported by the housing, a final drive bull gear fixedly secured to the sun gear shaft and in mesh with the input pinion gear, a planetary reduction gear group with a carrier thereof being rotatably mounted on the sun gear shaft, a sprocket rotatably mounted on the housing, and a torque tube fixedly secured to the sprocket and mounted for rotation on the sun gear shaft, the torque tube being coupled with the carrier.

Abstract: The disclosure relates to the manufacture of wire-drawing dies. The disclosure provides a method for securing a core in a metal housing. The method begins with the clamping of an annulus, consisting of a hardenable metal alloy, around a cylindrical core consisting of a material such as polycrystalline diamond or boron nitride. The core is clamped so as to produce a permanent, radially compressive stress therein. The core-annulus combination is secured in a metal housing of a conventional shape.

Abstract: A rotating trimmer in a wire trimming machine is shown comprising a cylindrical trunk with a champhered bore for receiving an insulated wire or coaxial cable, and an open midsection for evacuating the trimmed insulation from the wire. The edge of a cutting tool is located in a slot adjacent the midsection to engage and trim the wire. The mass of the trimmer is symmetrically distributed about the longitudinal axis for uniform rotation and trimming.

Abstract: An apparatus for cutting through a continuously longitudinally moving wire has a pair of cutter drums centered on and rotatable about respective generally parallel axes and having respective radially outwardly open generally helical wire grooves of substantially the same pitch but opposite hand. These drums are radially relatively closely spaced and define a nip. A guide element is integral with and fixed rotationally on one of the drums and is formed with a helical guide groove of the same hand and pitch and centered on the same axis as the respective wire groove but is axially offset therefrom. A cutter blade is provided in at least one of the wire grooves adjacent one axial end thereof. The two drums are synchronously rotated at the same peripheral speed by a drive. A swingable guide tube is directed generally tangentially at the nip and has a downstream end closely juxtaposed with the drums at the nip. The wire passes longitudinally through this tube toward the drums.

Abstract: A trimming and piercing apparatus of an extremely high operation efficiency which is capable of trimming and piercing a work simultaneously. The apparatus comprises a fixed die provided with a work mounting surface and a piercing bore opened at the work mounting surface, and a movable die displaceable toward and away from the fixed die. A pair of movable blades and a pair of fixed blades are provided in a spaced opposed relation on the movable die and the fixed die, respectively, so that the movable blades are engageable with said fixed blades when the movable die is moved toward the fixed die. A cam slide having a piercing punch is slidably mounted on the movable die. A cam driver is mounted on the fixed die for driving the cam slide to move along the movable die toward the fixed die to place the piercing punch into fitting engagement with the piercing bore in the fixed die as the movable die is displaced toward the fixed die.

Abstract: Apparatus for cutting planar workpieces including a saw movable through a cutting stroke in a substantially horizontal direction with a first and a second table being provided on opposite sides of the saw. The planar workpieces are first fed from the first table onto the second table through a first cutting operation and the cut parts are rotated relative to the saw on the second table and then fed through a second cutting operation back onto the first table. A pusher device is provided on the second table for feeding the planar cut parts and a feeding device on the first table operates to selectively feed planar strips from the first table to the second table. The first table is provided with two sets of rollers capable of conveying planar parts in two transverse directions with the sets of rollers being vertically displaceable relative to each other.

Abstract: A transverse cutter for a running web of paper or the like has two rotary drum-shaped holders disposed opposite each other at the opposite sides of the path for the web. Each holder carries at least one knife with an elongated cutting edge extending transversely of the path of movement of the web, and each knife of one holder cooperates with a knife of the other holder to sever the web once during each revolution of the holders. One of the knives is adjustable with reference to the respective holder so that its cutting edge can be shifted relative to the cooperating cutting edge of the other knife. The adjusting mechanism for the adjustable knife includes a row of closely adjacent wedge-like retainers which are recessed into the peripheral surface of the respective holder and are movable radially of such holder by threaded fasteners which can move the associated retainers radially inwardly against the opposition of dished springs in the respective holder.

Abstract: A portable apparatus that can be wheeled to a pallet supported by a conveyor for selective removal of nails that interconnect the stringers with the deckboards. The portable apparatus has a platform that is moveable in a vertical direction to position the cutting means at the juncture of the stringer with the deckboards. Such apparatus has a pair of pivotal cutting means that are moveable toward each other into intermeshing contact to shear nails.

Abstract: A cutting head for a glass cutting machine includes a cylinder, a piston movable in the cylinder in one direction to a cutting plane under control of compressed air from a source communicated to the cylinder to act on an upper face and move the piston in opposition to a bias force, a rod attached to and movable with the piston and a cutting wheel carried at the end of the rod for cutting a glass sheet from a glass blank. A port is formed through the wall of the cylinder and means connected to the port responsive to a rapid rise in pressure function rapidly to isolate the cylinder from the source of compressed air and to vent the cylinder. During a cutting operation, the piston seals the port. If the cutting wheel should move beyond the extremes of the glass blank or for any reason move further in the one direction, following movement of the piston shall open the port and the cutting wheel will rapidly retract to and beyond the cutting plane without damage to the cutting wheel.

Abstract: Tone amplitudes of signals which are generated in an electronic organ are converted into digital values and such values are cyclically memorized by a RAM storage at locations which are selected in accordance with a first function. The locations in the storage are then scanned in accordance with one or more second functions which differ from the first function in dependency on time, the thus ascertained or read-out digital values are thereupon converted into analog values, and the analog values are consolidated into processed tone signals. The second functions are or can be derived from the first function.

Abstract: The invention relates to a circuit for synthesizing either simple or complex waveforms of the type used in electronic musical instruments, such as electronic organs. In the specific embodiment disclosed herein, the synthesizing circuit is utilized in a rhythm unit for producing a damped sine wave charateristic of certain drum sounds. Opposite polarity waveforms are simultaneously produced by a switched capacitor technique driven by an attack/decay clocking signal and under the control of a keying signal received from a suitable low frequency rhythm clock source. The positive and negative waveforms are alternately selected in order to produce bipolar pulses at the frequency of the desired tone, and these pulses are connected to the input of a switched capacitor filter that modifies the pulses to produce a sine wave signal having an amplitude following that of the desired damped envelope.

Abstract: A machine gun ammunition loading system employs cantilevered support memb on a magazine holding a leading round of belted ammunition supported above a cover of the magazine. The cover of the magazine includes mating parts which permit sliding engagement below the machine gun. When fully mated, the cantilevered members, with the leading round between them, are inserted into the receiver in a loading position from whence charging can be performed by single-handed motion of an operator while upright and walking.

Abstract: A recorder training device comprising a recorder body having a plurality of tone holes provided with a couple of electrodes opposingly disposed around them such that the electrodes may be indicated by electric lights on the corresponding tone hole figures of a recorder pattern shown on an indicator plate, or on the electric lights on the musical scales of a music score pattern indicated on an indicator plate.

Abstract: A system for transcribing a sequence of input analog signals having characteristic frequencies and durations into indicia which visibly reflect the frequencies and durations of the input analog signals. The system uses the principles that the frequency of an analog signal can be determined from the number of zero crossings the signal makes in a predetermined time period and that the durations of the input analog signals can be determined from the number of successive time periods that the determined frequencies remain the same.In the preferred embodiment, the system transcribes successive musical tones into corresponding musical notes. A microphone produces electrical signals corresponding to the musical tones and a frequency digitizer circuit produces a digital signal train comprising a digital pulse for each zero crossing of the electrical signals.

Abstract: A method for loading a plastic bonded explosive by the use of ultrasonic rations and moderate pressure.

Abstract: This invention relates to an improvement in a launch for carrying and launching flying bodies, in particular for aircraft, with guide devices in the form of guide rails and guide claws engaging said rails and bearing the flying body,the improvement comprising(a) means whereby the guide claws can be adjusted together with the flying body relative to the aircraft-fixed launch in the direction of flight within the guide rails and also relative to the flying body they carry in the direction of the flying body tail,(b) detachable, positive connection means and frictional connection means between the guide claws and the flying body, and(c) braking means for the guide claws at the launch.

Abstract: A gaseous blast reducer employs a membrane which is effective to contain a ass of gas having properties different from air, in the vicinity of the source of the blast. The blast is forced to propagate through the mass of gas before propagating in the air. An acoustic mismatch caused by the difference in properties between the gas and air reduces or attenuates the blast.