Abstract: Fluid, such as air, flowing through a duct is sampled by a detector in a chamber by withdrawing a portion of the fluid from the duct by an impact tube which connects the duct to an inlet in the sampling chamber. Several openings in the impact tube extend across the duct and face into the direction of fluid flow in order to obtain a cross-sectional and representative sample of the fluid. To insure that an adequate sample is obtained, one or more venturi tubes are also placed into the direction of the flow path of the fluid and these venturi tubes are connected to the outlet of the sampling chamber to exert a pressure in the chamber which is negative with respect to the chamber inlet from the impact tube.

Abstract: A coupling that permits a connection to be made to a fluid system with a minimum of included air, even though the coupled device is not pre-filled. The coupling is particularly advantageously employed as part of a sampler used to take fluid samples for analysis as to air content. It includes a valve housing, a valve seat slidable within the housing and a valve closure member slidable within the seat. A lost motion mechanism allows joint movement of the seat and closure member prior to disengagement of the seat from the closure member. The fluid passage by which fluid is withdrawn from the system extends through the closure member.

Abstract: The roof and walls of a mine are inspected for fissures, channels and other geological structure by use of a vibratory energy transmitter and a vibratory energy receiver each of which are forced into contact with the wall or roof by a jack with little or no loss of vibratory energy. The frequency of vibration is between 10 and 100 kilohertz.

Abstract: An ultrasonic inspection system including a defect gate which can be interfaced with a digital computer. A high frequency precision oscillator and two preset counters define the start and duration of a gate period or window corresponding to an inspection depth range within the test specimen. The magnitudes and locations of the two or more largest defect indications within a gate window are determined and made available to the computer for analysis and diagnosis. A rear interface gate window is provided and a determination is made as to the presence or absence within the rear interface gate window of a signal representing the rear interface of the specimen. The distance between the interrogating transducer and the test specimen front interface is also determined at each point. Means are provided for real time control of the inspection system parameters by the computer to allow adaptive control of the inspection process based on real time diagnosis of the test data.

Abstract: An elongated tubular housing has differential pressure transducers at spaced points therealong and electrically insulated therefrom by a mounting means. Each mounting means has a diaphragm exposed to pore water pressure and a diaphragm exposed to hydrostatic pressure at its location. The opposite sides of a third diaphragm are responsive to the pore water pressure and hydrostatic pressure. Conductors are provided on opposite sides of the third diaphragm to measure differential conductance which is analogous to excess pore water pressure.

Abstract: A fluid floated inertial platform is inertially stabilized by means of a plurality of hydraulic torquers which operate in response to electrical stabilization signals which may be generated in response to gyro pickoffs on stabilizing gyros for each of the three stabilization axes. Each of these hydraulic torquer devices comprises a deflector member, which may be in the form of a section of a cylinder, this deflector member being supported on a base member mounted in the surface of the platform. The deflector is supported on the base member by means of flexible strips or tapes which permit rotatable motion of the deflector in response to torquing signals. Such rotatable torquing of the deflector is provided by means of an armature mounted on the deflector which operates in conjunction with an electrical torquer on the base member which receives electrical torquing signals from the stabilization system.

Abstract: The following specification describes a rotor and case in a gyroscopic device generally forming a ball-shaped apparatus having an internal circular race. The internal circular race supports the rotor, which is mounted on a shaft that extends through the rotor and is received in an opening of a T-shaped cross sectioned ring which is placed within the race. The rotor rotates through the spin axis thereof, while at the same time a second axis at right angles that intercepts the spin axis is established around which the rotor will precess. By giving the rotor an initial spin and then holding the support structure or ball in the hand and manually applying a torque to the support structure or ball, the rotor will precess about the second axis of precession and produce a torque opposing the manually applied torque. The rotor is provided with fins for maintaining the rotor in a smooth moving configuration, while at the same time cooling the spinning rotor so as to eliminate frictional wear.

Abstract: A single or multiply endless belt possessing predetermined elastic properties consisting of a flat knit substrate which has been impregnated with an elastomeric material and made endless by wrapping upon itself and the method of producing the same.

Abstract: An improved rotor ring for use in an inertial energy storage rotor, the rotor being defined by a plurality of independent, concentric rotor rings rotatable about a vertical axis. The improved rotor ring includes a cylindrical body portion, fabricated from a fiber composite, and an unreinforced resinous face member attached to one or both of the opposing end faces of the ring. The resinous face member includes a number of radially oriented grooves which are adapted to accept clamps and other elements used to assemble and hold together the rotor rings.

Abstract: An improved chain link comprised of a two piece barrel, a pin and a sprocket engaging aperture. The chain link of the invention is formed from a blank having a body portion with a tongue attached to one end thereof. The tongue is formed into a barrel hook. A flap is taken from the inside of the body portion and formed toward the barrel hook to form the remainder of the barrel and the sprocket engaging aperture of the chain link. The pin is formed from the other end of the body portion.

Abstract: A block and bar chain of the trolley conveyor type includes a center link having U-shaped bushing inserts at the ends of the link. The inserts with the center link are respectively turnable on the pins; the center link is pivotable on either insert about a separate axis normal to that of the pins. The improved double flexure of the chain reduces the stress in the chain parts comprising the joint and in turn allows the center link and the inserts in particular to be of a molded plastic construction of the required configuration. The inserts have pivot and retaining means and their plastic construction permits their "snap-in" assembly.

Abstract: A control device for a rearview mirror comprises a mirror fixed on a support element mounted for pivoting about a first axis on a crossbar which is mounted on a yoke rigid with a casing for pivoting about a second axis perpendicular to the first axis. Two independent cams are mounted on the casing to act respectively on a boss imparting to the mirror a pivoting movement about the first axis, and on a boss imparting to the mirror a pivoting movement about the second axis.

Abstract: A control mechanism for shifting the differential lock mechanism of a vehicle between unlocked and locked positions. The differential lock is hydraulically operated and is controlled by a two position hydraulic valve. A control link extends from the hydraulic valve to the control mechanism. When the control link is disposed in a retracted position the differential lock will be disposed in an unlocking position, and when the control link is disposed in an extended position the differential lock will be in its locking position. The control mechanism includes a pivoted cam-like member and a pivoted catch member provided with cooperating surfaces, biasing means operable to bias the cam-like member to a retracted position and actuator means operable to shift the cam-like member away from its retracted position through engaged and stop positions to a release position.

Abstract: A torsional vibration damper and method and apparatus for its manufacture. The outer inertia member carries a radially inwardly extending web, the web sandwiched by a pair of elastomer members. A two-piece hub sandwiches the elastomer members, the two hub pieces being held together as by swaging or by rivets. Tooling for the swaging mode of assembly is shown such that the elastomer members are deformed from an original to a final configuration, and the swaging then accomplished with a single continuous movement. The swaging assembly apparatus for the device includes Belleville springs, the apparatus limiting the maximum force applied to that portion of the hub members controlling the assembled elastomer thickness. The damper configuration facilitates low specific energy dissipation and large elastomer-to-metal interface area to thus tend to lower shear stress in the elastomer. In addition, should the elastomer fail in use, the damper inertia mass is mechanically constrained to remain with the hub assembly.

Abstract: This invention relates to suppression of vibrations in massive systems including large rotating elements such as induction fan rotors used in electric power generating plants. In particular, this invention relates to the provision of a tuned vibration absorber with very low damping, often known as a dynamic vibration absorber, which acts to reduce or suppress the vibration of a system having a resonant frequency near its operating frequency.

Abstract: In a transport roller rack for automatic film developing machines, power gears supply the main flow of power to the rack, and cluster drive gears are coaxially rotated by the power gears to tap off fractions of the main power and supply these fractions to clusters of gears which in turn drive transport rollers.Coaxial gear units are used at the power tap off point. Each unit has a plurality of axially displaced portions, one constituting the power gear, another the cluster drive gear. The unit is supported by a shaft for axial rotation, but the construction of the unit is such that the shaft need not be relied upon to transmit the coaxial rotation from power gear to cluster drive gear.Such a coaxial gear unit greatly simplifies the construction and also leads to smoother operation with less risk of damage to the film.

Abstract: Differential gear sets and planetary gear sets in combination with sets of corresponding radially distributed helical surfaces in drive couplings such as cone clutches. The helical surfaces allow axial movement of the cone members of a clutch selectively into engagement with either of two mating cone members thereby enabling an output member to be selectively driven bidirectionally.

Abstract: A tool for turning the screw cap on a container and having a handle and a band to loop around the screw cap, a screw-threaded tensioning device to tighten the band onto the screw cap, and a quick release nut or other similar quickly releasing device to quickly release the band.

Abstract: An improved wrench particularly adapted for use with cylindrical, delicate workpieces such as chrome-plated or plastic pipes, is provided with a resilient, spiralled strip adapted to be simply wrapped around the circumference of the workpiece for gripping and turning the latter when an elongated handle attached to one end of the strip is manipulated by the user. The strip is provided with a straight stretch adjacent the handle, which is held in substantial parallelism with the longitudinal axis of the handle, and is effective in translating an increased amount of the force applied to the handle into a usable tension force on the strip in a direction tangent to the circumference of the workpiece, rather than into an inwardly directed force that is either wasted or may damage the workpiece.

Abstract: An apparatus for selective attachment to a rotary microtome in order to permit separation of the specimen from a cutting knife during the return stroke of the specimen. A small frame is adapted to fit within the conventional specimen holder or chuck of the microtome; and the frame carries a solenoid with a movable core. Attached to the forward end of the movable core is an auxiliary specimen holder; attached to the other end of the core is a plate against which a compression spring constantly presses. The preferred power supply for the solenoid is a filtered 30 volt DC power supply. The solenoid is energized only during the downward, cutting stroke of the microtome, and it is de-energized before the arm starts its return stroke. The spring urges the specimen holder away from the knife when the solenoid is de-energized. The apparatus may be readily installed on any conventional rotary microtome with minimal skilled labor; and it may be removed at will to restore the microtome to its original condition.

Abstract: A car on tracks behind the knives of a shear machine, has a section for receiving product cuttings when the car occupies one position on the tracks, and means are provided for receiving scrap cuttings when said car is moved to another position, the car being capable of additional movement on said tracks to a position to the rear of the machine for convenient disposal of cuttings carried by it. Work support means carried by the car, supports work prior to shearing and, when possessed of magnetic qualities, will magnetically grip the work and enable adjustment thereof for shearing, by movement of the car. In lieu of magnet work supports, roller supports may be provided, and such roller supports may be power driven.

Abstract: A sub-water granulating device for granulating thermoplastic synthetic plastics materials is operatively combined with the nozzle plate of a screw extruder. The device comprises a rotary cutting tool head which is enclosed by a dome or hood. Flushing water is fed into the dome and discharged therefrom and the flow of water is directed to clean the cutting tools and to carry out granules cut by the tools thereby preventing the formation of lumps of granules and adhesion thereof to the nozzle plate.

Abstract: On a shear machine having a ram, a work table, and a hold-down means to grip work to the work table, a hydraulically sequenced circuit to inhibit the downstroke of the ram until a sufficient hold-down pressure has been achieved at the hold-down means to effectively grip the work to be operated upon, and a booster cylinder responsive to the down-stroke of the ram for maintaining the pressure at the hold-down means during the cutting stroke of the ram.

Abstract: A saw arrangement in which a panel to be cut is backed in an upright position by a frame and is supported by a lower edge rest includes a vertically extending carrier bar horizontally sweeping the working area defined by the backing frame and the edge rest, a carriage vertically movable on the carrier bar, and a sawing device movable on the carriage transversely to the working plane. Operating elements for so moving the carrier bar, the carriage, and the sawing device may be connected individually to a central drive unit by means of a single motion transmitting element and individual controls for drivingly connecting the motion transmitting element to the carrier, the carriage, and the sawing device.

Abstract: A lower guard assembly for both sides of the blade, which retracts a minimal amount while cutting, providing a maximum of blade enclosure and consequent protection for the operator.

Abstract: A digital keying system for an electronic musical instrument, such as an electronic organ, comprises a digital percussion generator which synchronizes the operation of a variable attentuator with the zero crossings of a sine wave signal applied to the input of the attenuator from a waveform generator. Pulses from a rhythm generator are applied to a coincidence gating circuit along with pulses corresponding the zero crossings of the sine wave signal from the waveform generator to synchronize the stepped operation of the variable attenuator with the zero crossings of the sine wave signal applied to it.

Abstract: The inventive circuitry extends the harmonic content of musical tones produced by a computor organ of the type disclosed in U.S. Pat. No. 3,809,786. A memory stores values of an algebraic approximation of the summation of the amplitudes of a set of Fourier components of order higher than those separately evaluated by the computor organ itself. As each musical waveshape sample point amplitude is computed by the computor organ, the stored summation approximation value for the corresponding sample point is accessed from the memory. This accessed value is appropriately scaled, and is added to the sum of the lower order Fourier component contributions that are calculated by the computor organ. The resultant sample point amplitudes are converted to musical tones in real time. In an illustrative embodiment, musical tones having the spectral content of a sawtooth wave are produced.

Abstract: An instrument pick which is designed to facilitate use by the player of a stringed instrument. The pick has a standard planar body with parallel raised surfaces attached on each side of the body. These raised surfaces are spaced a distance equal to the width of a normal human finger and thereby form a channel which the finger may rest in and is cradled by. In order to effect a secure grip of the pick, the channel formed on one face of the pick runs laterally of the pick while the channel on the opposite face runs longitudinally of the pick, thereby forcing the fingers of the user to be placed properly on the instrument pick.

Abstract: A board with a handle, has several distinct rows of holes in it, each row having a plurality of holes which are separated by hubs which extend into the passageway between the holes from opposite sides, and a pair of jingle discs between each pair of hubs.

Abstract: A fluid operable hammer including variable volume exhaust fluid receiving chamber means cooperable with improved motive fluid inlet and exhaust valve means.

Abstract: A multiple servo system including two or more servo mechanisms, each having a pressure feed back including two pistons exposed in respective chambers interconnected by a low-pass hydraulic filter, in which the area of the two feedback piston faces differ by up to 25%. This reduces the tendency of the respective actuators to act in opposition and thus increases the service life of the system.

Abstract: A traveling paint spray booth is movable on rails beneath a stationary exhaust duct extending longitudinally of the rails. The bottom of the stationary duct is formed by a plurality of dampers pivotable to open and closed position on a hinge having its axis extending longitudinally in the duct and protected by an air deflector. The booth is provided with damper openers which engage the body portion of successive dampers to open them as the booth passes therebeneath.

Abstract: An attachment for laboratory fume hood structures and the like for opening and closing the movable sash member thereof to vary or close the effective size of such access opening, and in particular to move the sash into closed position when the hood is unattended and to open the hood in the presence of operating personnel. The construction is such that the device may be readily attached to most existing fume hood structures and the like with substantially no modification or change in the latter and providing automatic operation when desired as well as manually controlled operation. At the same time the construction is such that the sash member may be manually actuated if necessary. A further improvement provides for the control of the hood exhaust blower, for example to provide high speed operation when the sash is in open position and low speed operation when the sash is in a lowered or closed operation and, if desired, simultaneously therewith the control of an auxiliary air blower.

Abstract: In a conventional plastic drip coffeemaker, an improvement is provided for mounting the hot water generator comprising a single plastic molded box-shaped housing having an access opening only at one end and the other end and side walls being integrally formed. Spaced ribs are molded on and extend along a side wall towards the opening and terminate inside of the opening. A molded-in boss for securement is provided on the opposite side wall and a U-shaped channel member crosses the access opening with its legs directed inwardly of the housing to straddle in fixed abutment against the ribs at one edge and fixed to the boss at the opposite edge. The hot water generator is secured to the channel inside the opening so that the generator is fixed against all lateral movement by the straddling channel and against movement into the opening by abutment against the ribs.

Abstract: A drip-coffee maker having a coffee dispersing section mounted to a coffee receiving vessel, the latter characterized by having double walls provided with an evacuated space therebetween, a filter contained in the dispersing section to filter the coffee into the vessel, and a venting means positioned between the dispersing section and the vessel to provide atmospheric connection between the vessel and the atmosphere.

Abstract: A small cooking apparatus intended for domestic use in the grilling of steaks, hamburgers and other foodstuffs consisting of a base and a cover which are hingedly connected there being mounted in each an electric heating element embedded in a block of metal such as aluminium adapted to constitute a heat sink. Associated with which is a removable cooking plate of light washable construction which is maintained in intimate contact with the heat sink so as to ensure maximum transfer of heat. The light construction of the cooking plate and the fact that they do not incorporate heating elements facilitates washing of the plates. The plates are preferably provided with insulated handles and the cover is preferably mounted so as to be capable of tilting about its mid line to accommodate foodstuffs of different thickness.

Abstract: An individualized barbeque has a mounting plate with a groove around its periphery onto which a rotisserie-burner apparatus is removably mounted. The rotisserie-burner apparatus comprises a first and a second support between which a burner apparatus is attached. A skewer is supported between a notched member fixed to the first support above the burner apparatus and extends through an enclosed member fixed to the second support above the burner so that the skewer cannot tip under the weight of the skewer handle. The burner has a container portion for holding the fuel and outwardly bent flanges around a portion of the top edge of the burner which support a lid. The lid has a narrow elongated flame opening on a top portion and at least one vent opening in a side portion. The vent opening preferably has a vertical projection which falls outside the area defined by the bottom of the container.

Abstract: Continuous destoning and halving machine comprises a conveyor belt wound as an endless ring and consisting essentially of a chain to each link of which there is externally hinged a half cup, provided in a position opposing said hinging point with an idle roller sliding on a rail in order to be kept horizontal, during processing of the fruits or inclined for discharging purposes; on the horizontal part of the conveyor being provided loading station consisting of a fixed cylindrical peripheral duct there being provided inside said duct and fixed to the driven shaft of the conveyor a group of radial dividing elements each of which faces, during operation, to a single hole through which the first piece of fruit of each alignment is discharged singly on to the underlying half cup; the processing station consists of lower and upper cylindrical crowns moving rigidly with the driven ring gear and supporting cooperating vertically sliding mandrels aligned two by two.

Abstract: A bundler and stacker for newspapers, magazines, books and the like characterized by economy in manufacture, collapsibility for shipping, ease and simplicity in use and automatic stacking of the bundles without lifting the bundles. The device is essentially an open-ended sleeve, rectangular in plan, and having divider means separating the sleeve into a lower portion which functions as a collar or support on a small starter bundle and on each succeeding bundle, and an upper portion functioning as a hopper or aligner for the newspapers as they are added and tied into bundles, the divider means being preferably flat members extending into and across the sleeve and being relied on to hold the sleeve in position while the hopper portion is being filled. The sleeve has means to hold bundle tying string or the like in the hopper while the same is being filled.

Abstract: Apparatus for increasing the densichamber driven by a compression ram having a preset stroke and preferably being hydraulic, and a movable backplate facing the piston and being provided with means for producing a reaction force in opposition to the compression force of the ram and less than the maximum compression force exertable by the ram. Means for binding the compressed bales is also provided. Preferably the reaction force is maintained constant regardless of displacement of the backplate and this can be achieved by using a second hydraulic ram to which fluid is supplied at a constant pressure.

Abstract: An automatic bale wrapping assembly for a machine that forms round bales of windrowed crop material and includes a mobile main frame with a bale forming assembly having a bale forming region defined by an upper conveyor and a lower conveyor that feeds the crop material to the bale forming region and rotates the material during and subsequent to bale formation.

Abstract: A compactor-strapper comprising spaced forward and rearward fixed jaws, forward and rearward moveable jaws, hingedly attached independent actuators for said forward and rearward jaws, said jaws having removeable and replaceable insert members providing cavities forming a work reception chamber, and a strapping machine having a strap applying portion arranged around a strapping space defined by said cavities and between said forward and rearward jaws, and pneumatic circuitry with automatic cycling, controlling said jaws, said strapper, and a bundle ejector, resultant from a single manual control motion.

Abstract: A speed controlling arrangement and method for a mechanical press. The press has a crankshaft revolution which can be subdivided in principle into a discharging and charging region and a working region with the speed of the mechanical press being controlled between a maximum admissible speed and a minimum possible speed. The speed of travel of the press ram is controlled so that the speed of the press ram during the press discharging and charging region permits a safe discharging and charging of the press. During the working region, the press ram travels at a maximum permissible speed such that a stoppage of the press between the discharging and charging region and the working region is unnecessary.

Abstract: In a hydro-extractor, a screw is disposed with an outer concentric cylindrical sieve. The sieve is formed of sections placed lengthwise of the screw, with each section capable of having the same or different size holes so that the extractor captures solids both large and small in a controlled manner and will dewater faster or slower with various combinations of sieve sections. Where a sieve section contains smaller size holes of higher density per unit area and is constructed of relatively thin gauge material, an outer back-up screen of thicker gauge material with large holes is utilized in order to support the thinner screen and cooperate in withstanding the pressures generated during dewatering. Therefore, modulation of the sieve sections may be accomplished both vertically and horizontally.

Abstract: The reciprocating slide of a mechanically driven press has a ball and socket type interconnection with the connecting rod of the press drive mechanism. The socket component of the interconnection provides a rotatable adjusting screw by which the shut height of the slide is adjustable, and a locking nut threadedly engages the adjusting screw and is rotatable relative thereto and to the slide to lock the adjusting screw against displacement relative to the slide during operation of the press.

Abstract: Impact printing apparatus for recording at different character densities having an interposer unit movable between a plurality of print hammers and type chain to provide a translation function for the variable character-to-character distances required of the different character densities. During low density recording the interposer unit renders ineffective certain of the print hammers otherwise used for the higher density. A single type chain may be used with different interposer arrangements to obtain the various densities or type chains of different densities can be used.

Abstract: This invention provides an ink mist type high speed printer in which an aperture board is provided between a first electrode and a second electrode across which a high voltage is applied. The aperture board is adapted to selectively control passage of ions generated from the second electrode, and a stream of ink mist is passed between said aperture board and first electrode so that the ions which have passed said aperture board will electrically charge the ink mist particles selectively to let the electrically charged ink mist particles deposit on a recording paper placed between the ink mist and first electrode to thereby print the desired dot matrix characters. This invention also features provision of electrostatic shields placed between said first electrode and ink mist stream and at places outside of the desired printing space to guard the aperture board against deposition of ink mist particles.

Abstract: A printing press, comprises a plate cylinder, over which material to be printed is passed. An inking mechanism support member is located adjacent the plate member and a plurality of separate inking mechanisms are mounted on the support member and each includes an ink fountain, a fountain roller cooperatively associated with the ink fountain for picking up ink therefrom, a spreader roller cooperatively engageable with the fountain roller to pick up the ink therefrom, and an application roller positioned between the spreader roller and the plate cylinder for applying ink from the spreader roller to the material passed over the said plate cylinder. The individual ink mechanisms may be selectively positioned in an operative position with its application roller in cooperative engagement with the plate cylinder.

Abstract: A printing roller is disclosed comprising a mandrel fitted with a removable cylinder. The cylinder is retained on the mandrel by radially expansible, resilient rings which extend around the mandral. In one embodiment, the mandrel includes a number of cylindrical sections between which the rings are disposed and means are provided for compressing the sections to cause radial expansion of the rings. In other embodiments, the roller mandrel has an internal air passageway which communicates with the grooves receiving the rings and provision is made for delivery of pressurized air to the air passageway so as to cause the rings to expand.

Abstract: A method and apparatus for adding ink receptive areas to or removing ink receptive areas from printing plates in which a consumable stylus, such as a graphite pencil "lead," or a non-consumable stylus, such as a copper wire, is brought into contact with the printing plate.