Abstract: An apparatus that generates vibrational motion is disclosed. The apparatus includes a first mass, a second mass, a drive system, and a control system. The first mass is eccentrically mounted on, and configured to rotate about, a first shaft. The second mass is eccentrically mounted on, and configured to rotate about, a second shaft, with first and second shafts sharing a common axis. The drive system imparts rotational motion to first and second shafts, and the control system controls rotational frequencies, directions, and initial angles of the first and second masses. Linear, elliptical, or circular vibratory motion of the apparatus may be induced by controlling such rotational properties of the first and second masses. The apparatus may include a measurement device that measures angular position and/or velocity of the first and second masses. The control system may control the vibrational motion based on measurements taken by the measurement device.

Abstract: A motovibrator with continuous adjustment of the angular offset of the eccentric masses includes a substantially box containment body which accommodates electric motor elements which have a stator that is integral with the body and a rotor for the rotational actuation of a shaft about its own longitudinal axis. The opposite ends of the shaft protrude from the body and are each associated with at least one respective eccentric mass. The shaft includes a main section and a secondary section mutually aligned along the longitudinal axis, the main section being actuated rotationally directly by the rotor, and are coupled rotationally by interposition of transmission elements.

Abstract: An improved vibration control actuation system for a rotary-wing aircraft having a plurality of rotor blades mounted to a rotor hub and driven about a central axis of rotation at an operational speed and in a rotational direction relative to a non-rotating body of the aircraft comprising a vibration control frame adapted to be mounted to the hub and to rotate relative to the hub about the central axis in a rotational direction opposite to the rotational direction of the hub, a frame motor configured to rotate the frame about the central axis, the frame supporting first and second motors configured to rotate first and second masses about first and second axes not concentric with the central axis, and a controller for receiving input signals and outputting command signals to the first and second motors.

Abstract: Vibratory device (1) for compacting machine comprising a shaft (3), at least one eccentric mass (4,5,6) rotatable arranged around the shaft (3) and at least one motor (8) arranged around the shaft (3). The motor (8) is arranged for rotating drive of at least one of the eccentric masses (4,5,6) around the shaft (3). The motor (8) comprise a winding unit (9) connected to, the shaft (3) and a rotor (10) rotatable arranged around the shaft (3) and connected to at least one of the eccentric masses (4,5,6). The rotor (10) is arranged to be actuated by at least one magnetic field to rotation around the shaft (3) and the winding unit (9) is arranged to generate the magnetic fields which actuates the rotor (10) to rotation.

Abstract: A vibratory apparatus including a trough having one or more decks, with an inlet end and an outlet end, a first plurality of isolation springs disposed between the trough and ground, and a two-mass, sub-resonant frequency exciter supported on the trough. The trough and the exciter move 180-degrees out of phase with each other. The apparatus also includes a dynamic balancer including a plurality of isolation springs disposed between the exciter and ground.

Abstract: A plan sifter for sifting or sieving, flour-like or granular products, includes at least one compartment. Each sifting compartment has a dedicated drive, so that the base surface available can be better utilized, and the sifting capacity can be better adjusted to actual needs.

Abstract: A mobile vibrating screen with a readily stowable and pivoting drive system comprising a motor with an attached drive sheave, a belt, a driven sheave and plurality of universal joints which are configured to maintain a connection between the motor and an eccentric weight shaft when said drive system is switched from an operational configuration to a stowed configuration. In an alternate embodiment, some small d parts, e.g. drive shaft, need to be removed and stowed elsewhere on the plant when drive is converted from operation to transport.

Abstract: An oscillating screen comprises a screening container inside which a screening means is disposed lying on a determinate screening plane (P), coinciding or inclined with respect to a horizontal oscillation plane (X), and oscillation means to move the screening container with respect to a fixed supporting structure. The oscillation means comprises a first movement unit provided with a first rotary shaft associated with a first eccentric element cooperating with the screening container, and a second movement unit having at least a second rotary shaft provided with a second eccentric element cooperating with the screening container. A transmission means connects the first rotary shaft and the second rotary shaft with each other, so that they have the same angular velocity.

Abstract: A force generator for an active vibration control (AVC) system provides a mass located upon an inner circular member which is movable within an outer circular member to simultaneously complete one revolution about its axis as it orbits within the outer circular member to compensate for sensed vibrations. A crank mounts the inner circular member and a counterweight. The crank is rotated by a prime mover such as an electric motor. The mass will therefore generate a sinusoidal inertial force in a straight line. Multiple systems are suitably arranged to be used in conjunction with one another to provide a wide range of inertial force outputs.

Abstract: A vibrating screen aggregate separation device separates finer grained material from an aggregate material that may contain a wide variety of undesired materials. A mesh design associated with a vibrating screen contains perforations to allow smaller diameter material to pass through into a container that is situated below the screen. A suspension system is affixed between the container and the vibrating screen to allow a range of motion that is conducive to vibration of the screen, while at the same time, is supportive of the weight of the aggregate material that is to be screened. Vibration of the screen is effected by rotating an unbalanced rod along its longitudinal axis to induce vibrational energy to the screen and associated supporting structures.

Abstract: A method of attenuating the sound emanating from a bank of a plurality of vibrating screens of a plurality of vibrating screening machines including the steps of providing a master pulse of known phase and frequency, comparing the phase and frequency of a plurality of vibrating screens with the known phase and frequency of said master pulse, and adjusting the phase and frequency of said bank of plurality of vibrating screens so that the waveforms produced thereby tend to cancel each other. An apparatus for implementing the method is also disclosed.

Abstract: A sealed wheel case for use on a vibrating aggregate processing device comprises a housing sized to hold a rotatable wheel supported on a shaft, the housing having a base, a peripheral sidewall, and a cover. The cover includes an aperture adapted to receive therethrough a driven portion of the shaft. A seal is disposed adjacent the shaft and the aperture, and an annular baffle is mounted to an inside surface of the cover and extends into the wheel case. The annular baffle is positioned on the inside surface of the cover to generally surrounding the shaft and the seal, and a plurality of attachment bolts are arranged to secure the housing to the frame.

Abstract: A support structure for mounting a vibratory motor on a vibratory frame of a vibratory screening machine consisting of spaced flexures for mounting between the ends of a vibratory motor and the spaced sides of a vibratory frame of a vibratory screening machine, each of the flexures having a first end for connecting to the vibratory motor, and a second end for connecting to the vibratory frame of the vibratory screening machine, each of the flexures having a width dimension and a thickness dimension which is smaller than the width dimension, with the width dimensions extending substantially perpendicularly to the spaced sides, and the thickness dimensions extending substantially perpendicularly to the width dimensions.

Abstract: A vibrating screen separator. The vibrating screen separator may be operated in a linear, an elliptical, or in a transition from elliptical to linear modes of operation. In the linear mode of operation, the screen separator moves along a reciprocating straight line path, and, in the elliptical mode of operation, the screen separator moves along an elliptical path. In the transitionary mode of operation, the screen separator is transitioned from movement along the elliptical path to movement along the linear path.

Abstract: A vibrating screen separator. The vibrating screen separator may be operated in a linear or elliptical mode of operation. In the linear mode of operation, the screen separator moves along a reciprocating straight line path, and, in the elliptical mode of operation, the screen separator moves along an elliptical path.

Abstract: There is provided screen apparatus comprising side walls having a lower edge portion configured to accept tubular screen support members. An upper edge extends from the inlet end of the side walls to an apex from which a declining edge extends to the foot of the side walls. The lower edge, upper edge and declining edge are each provided with edge stiffening. A torque tube is secured between the respective exciter mount castings, the torque tube and stiffened side wall being selected to provide that the first fundamental frequency mode greater than the exciter frequency is at least 2 Hz greater than the exciter frequency and the first fundamental frequency below the exciter frequency is at least 2 Hz lower than the exciter frequency.

Abstract: A vibrating screen separator. The vibrating screen separator may be operated in a linear, an elliptical, or in a transition from elliptical to linear modes of operation. In the linear mode of operation, the screen separator moves along a reciprocating straight line path, and, in the elliptical mode of operation, the screen separator moves along an elliptical path. In the transitionary mode of operation, the screen separator is transitioned from movement along the elliptical path to movement along the linear path.

Abstract: A vibrating screen supported by springs and vibrated via rotating gear sets. The gears are provided with off center weights synchronized to produce angularly directed vibration for moving the material from end to end on the screen. The gears are lubricated with a bath of low viscosity lubricant which is vibrated to form lubricant spikes that extend into the path of the weights to be propelled by the weights into the gears. The weights are substantially crescent shaped at their leading end to avoid hammer like impact of the lubricant and to thereby reduce heat generation.

Abstract: A sealed wheel case for use on a vibrating aggregate processing device comprises a housing sized to hold a rotatable wheel supported on a shaft, the housing having a base, a peripheral sidewall, and a cover. The cover includes an aperture adapted to receive therethrough a driven portion of the shaft. A seal is disposed adjacent the shaft and the aperture, and an annular baffle is mounted to an inside surface of the cover and extends into the wheel case. The annular baffle is positioned on the inside surface of the cover to generally surrounding the shaft and the seal, and a plurality of attachment bolts are arranged to secure the housing to the frame.

Abstract: A vibratory screen separator having a resiliently mounted frame with a screen mounting to receive screens for material flow thereacross. Eccentric weight systems are rotationally mounted with effective axes of eccentric force coincident. The weight systems are symmetrical about a center plane through the separator for uniform vibration thereacross. The coincident axes extend through the center of gravity. A drive is coupled with both weight systems such that the direction of rotation of the weight systems are opposite to one another in one embodiment and opposite in another.

Abstract: A vibratory separator having a resiliently mounted housing with a vibratory drive. A screen extends across the housing and a cover is positionable over the screen. The screen includes a discharge port therethrough aligned with a discharge passage for removing material from the top of the screen from the system. Another discharge passage cooperates with a manifold plate extending across the separator beneath the screen. An access port is provided through the cover and arranged to receive a discharge plug which can selectively close the discharge hole through the screen. In operation, separating or dewatering is first accomplished, the energy level of the vibration is reduced and a vacuum is drawn above the screen. Bleed air is allowed into the separator below the screen with a restricted flow so that a vacuum can be drawn. Once the material has dried, the vibrational energy can be increased and the plug removed from the hole through the screen. The process material may then be discharged from the unit.

Abstract: A vibration-type screening machine capable of screening loose material with a significantly enhanced efficiency includes a stationary base frame, a pair of upstanding side plates supported on the stationary base frame through spring suspensions and disposed substantially in parallel with each other so as to extend longitudinally of the screening machine, a plurality of sieve mesh supporting rollers rotatably mounted between the upstanding side plates, an endless sieve mesh web disposed between the upstanding side plates with an upper span section thereof being supported on the plurality of sieve mesh supporting rollers so that the endless sieve mesh web can endlessly move in a direction longitudinally of the screening machine from a loading port toward a discharging port, a driving unit moving endlessly the endless sieve mesh web, and an eccentric rotating vibrating mechanism disposed at a position near to the loading port and operatively coupled to the pair of upstanding side plates so that the sieve mesh su

Abstract: A vibratory screening device includes a frame and a screen, supported by the frame, for separating undersize and oversize material. A vibrating device, coupled to the screen includes a first output shaft with an axis of rotation that oscillates relative to the frame. The vibrating device oscillates the screen as the first output shaft is rotated. A driver includes a second output shaft with an axis of rotation that is fixed relative to the frame. The driver rotates the first output shaft. A connector mechanically couples rotational output of the first output shaft to the second output shaft. Preferably, the connector includes a first universal joint, a sliding spline shaft, and a second universal joint. The driver preferably includes an engine, a centrifugal clutch coupled to the first output shaft, a sheave, and an endless belt connecting the centrifugal clutch to the sheave.

Abstract: A sieving device includes a sieve having a base, a drum and a main rim. A screen assembly having a mesh screen and a screen frame extending around a periphery of the mesh screen is resiliently mounted within the main rim. A low frequency vibrational drive vibrates the sieve at low frequencies. An ultrasonic vibrational probe rests on the screen frame free of rigid attachment thereto and vibrates the mesh screen around a periphery thereof. The ultrasonic vibrational drive includes an ultrasonic processor which drives the ultrasonic probe. A probe tip of the probe extends through a side wall of the main rim and rests on a top surface of the screen frame vibrating the screen from the periphery of the screen inwardly to sieve a particulate material. An alternative embodiment has a tab which extends outwardly from the screen frame. The probe tip extends through the sidewall of the main rim and through a sidewall of the drum to abut the tab.

Abstract: A vibratory drive for use with a screening machine for draining and/or sizing of grain solids, the drive having two eccentric shafts which are driven synchronously and in counterrotation and which have different unbalanced masses 7, 8. The eccentric shafts are arranged as near as possible to the mass center 16 of the screening machine. The angle of the mass forces of the unbalanced masses 7, 8 of the eccentric shafts includes an angle of 60.degree. to 90.degree., preferably 90.degree., between the main direction of oscillation 18, i.e., the long axis 19 of the ellipse oscillation as a resultant of the centrifugal forces, and the zero line 17, i.e., the tie line of the eccentric shafts.

Abstract: A portable shaker frame that is particularly adapted for separating irregularly-shaped wood shavings used in animal stalls as bedding materials from manure contained in the bedding material. The wood shavings are recovered for reuse and the manure is separated therefrom for disposal. The shaker frame is inclined and is suspended on springs carried on a carriage having wheels to permit it to be moved from place to place. The springs permit the shaker frame to vibrate relative to the carriage frame. The shaker frame includes a number of longitudinally extending, substantially parallel steel rods that are spaced from each to enable the irregularly-shaped wood shavings to pass therethrough while the manure slides downwardly along the rods and into a collection container for disposal. A vibratory motor is positioned on an end panel of the shaker frame for imparting vibratory motion to the rods carried by the shaker frame.

Abstract: A vibratory screening apparatus has two vibrator motors (19, 20, 19', 20') having respective out-of-balance weights arranged to produce substantially linear vibratory movement when, in use, these motors (19, 20, 19', 20') are running in mutually opposite directions, an electrical control means (37) connected to the motors (19, 20, 19', 20') and is selectively operable between a non-running mode in which both motors (19, 20) (19', 20') are stopped and two running modes in one of which both vibrator motors (19, 20, 19,' 20') run in mutually opposite directions to produce substantially linear vibratory movement and in the other of which at least one of the motors (19, 20, 19', 20') is rotationally reversed and both motors (19, 20, 19', 20') run to produce orbital vibratory movement.

Abstract: An electric motor-driven unbalanced vibration generator with an electric motor which is enclosed in a motor housing and the extended motor shaft of which is provided with at least one unbalanced body which can rotate and which is provided in a region which lies radially outside of a radial segment of the unbalanced body, with an additional segment which extends over the motor housing and which can rotate around it. The axial segment of the unbalanced body represents the critical part of the unbalanced mass. As a result of the axial extension of the unbalanced body over the motor housing, and thus the shifting of the center of mass of the unbalanced mass to between the bearings of the motor, a second unbalanced mass at the other end of the motor is no longer necessary. In addition, as a result of the outside radial position of the main segment of the unbalanced body, the unbalanced mass can easily be changed by means of additional masses which can be inserted into the segment and removed from it.

Abstract: A vibrating screen unit for dewatering dredged material. The vibrating screen unit includes a frame and a top screen deck, a middle screen deck and a bottom screen deck. The middle screen deck includes a splitter which extends across the width of the frame and comprises alternating closed channels and screen rows which alternate across the width of the frame.

Abstract: There is disclosed a vibratory screening apparatus comprising a frame having a pair of opposed screen frame sides, a multi-deck screen mounted on the frame sides, and a shaft-driven vibratory mechanism coupled with the screen in order to impart vibration energy thereto so as to assist the screening operation. The vibratory mechanism comprises a pair of stubshafts associated one with each of the frame sides. A respective pair of bearing housings support each stubshaft on each frame side. The bearing housings of each respective pair are spaced apart from each other, and a respective counterweight is mounted on each stubshaft in the space between the housings. The counterweights are rotatable with the stubshaft so as to apply vibration energy to the stubshaft, and therefrom to the screen via the bearing housings and the frame sides. Drive motors are coupled with each stubshaft and are arranged to be driven in synchronism in order to apply synchronous rotary motion to each stubshaft.

Abstract: A shaker with an open frame, sides, a flat bottom and open ends. The shaker has pre-lubricated sealed bearings and a self-lubricating plastic gear with a metal gear, which not only educes the amount of friction between gear teeth, reduces maintenance and noise resulting from the gears and enables applicant to provide an integral open frame in which the gears are supported. The gears may be inserted into the frame through the openings in the frame. This provides for easy assembly and the absence of lubricant is especially important in the food industry and other industries where contamination of products would be objectionable.

Abstract: A vibro separator, comprising a separator unit which is comprised of a screen assembly releasably mounted on a hopper at the top, which screen assembly has a screen releasably fastened therein; a vibrator unit which is comprised of a motor directly or indirectly attached to the hopper at the bottom for driving two eccentric weights to rotate via a revolving shaft; and a base which has springs for flexibly supporting the vibrator unit and the separator unit.

Abstract: A vibrating filter has a housing, top and bottom plates spaced vertically in an upper portion of the housing and defining an outlet chamber therebetween, at least one filter element dependent from the bottom plate into a filter chamber defined in the housing below the outlet chamber and a process liquid inlet into the filter chamber and a filtered liquid outlet from the outlet chamber. A vibrator containing an eccentrically movable mass, abuts and is energizable directly through the top plate, without need for energizing hoses or conduits within the outlet chamber. The vibrator connects by a slim depending member to the bottom plate carrying the filter elements.

Abstract: Four shafts fitted with eccentric weights are arranged as four parallel lines with one pair placed immediately above the other pair and the ends of each are fitted with a notched driving roller. A double-notched belt driven by a motor passes alternatively under and above the rollers for the first pair of shafts, around a return, and above and under the rollers for the second pair of shafts. Idler rollers are associated with each shaft to ensure that the belt moves properly. By means of a slide, the motor and the return can be moved laterally in relation to the shaft lines, thereby permitting the continuous adjustment of the relative position of the eccentric weights for each pair of shafts. Therefore, the level of the resulting force of vibration is adjustable to between a maximum value and a zero value.

Abstract: The invention concerns a screening apparatus comprising two frame systems which are movable relative to one another, comprising grate bars assigned to each system, which grate bars of each frame system are alternately disposed and are connected by means of flexible screen elements which are fastened at the latter, bridge the distance between the bars, and are tensioned and relieved of tension by means of the relative movement of the two systems caused by means of an eccentric shaft which is supported exclusively at the two systems and rotated by means of a drive. This known construction is improved, according to the invention, in that the eccentric shaft is arranged at one end of the two systems (1, 7) and the latter are connected with one another at a distance from this end by means of an element (12) which ensures a substantially linear relative movement of the two systems relative to one another. The aforementioned distance preferably corresponds to the distance of the acceleration pole (P.sub.

Abstract: A concrete block molding machine has a vibratible mold box incorporating at least one molding cavity for a cement mixture which is to be densified in the cavity. A continuously driven shaft assembly mounts an eccentric fixed portion and a circumferentially adjustable balancing mass. The shaft assembly has a cylinder with a piston therein, connected to the mass to produce rotary motion of the mass relative to the fixed eccentric portion. A spring of predetermined rate opposes this. The pressure of the fluid introduced is varied to change the amplitude of the vibration imparted during each cycle.

Abstract: A separation system for removing drilled solids from a drilling fluid being circulated in a well including a vibratory screen apparatus (10) and method for separating materials having a base (12) supporting a vibratory support frame (13) for relative vibratory movement. A pair of transversely aligned motor vibrators (88) are mounted on a transverse horizontal support (82) secured between opposed sides (64,66) of vibratory frame (13) generally in the area of the center of gravity of the vibratory from (13). The motor vibrators (88) have rotational axes (L3) extending at an angle A with respect to the horizontal and being in a vertical plane parallel to the longitudinal axis (L1) of the screen bed.

Abstract: A vibrator for a concrete block molding machine to make molded concrete blocks comprises a vibrating table which receives wooden production pallets with a block mold on support bars and further comprises a vibrating drive. Infinitely adjustable amplitude level and frequency setting of the vibrating table is permitted because the vibrating drive means comprises four unbalanced vibrating shafts disposed especially in pairs beside and above each other. Those of the vibrating shafts which are arranged horizontally beside each other are adapted to be driven in contrary sense at the same number of revolutions by way of universal joint shafts from a regulator and distributor transmission. An hydraulic drive motor attached to the transmission is fed from an hydraulic pump of adjustable delivery volume of the hydraulic unit. Thus the vibrating frequency is adjustable by the rotational drive speed of the two horizontal vibrating shaft pairs (directional oscillators).

Abstract: A vibrating device, the vibrating part of which is equipped with a plurality of intercoupled unbalanced, shafts rotatably driven, in which the centrifugal forces generated neutralize one another in the direction at right angles to the direction of vibration and have the same directions in the direction of vibration, wherein the central shaft is provided on both sides whereof unbalanced shafts are located.

Abstract: A game toy wherein a vibrator is incorporated in a scooper for scooping up a model piece of a goldfish or the like put in a vessel, and whereby competition is made for catching the model piece in the condition that the vibrations of the vibrator are propagated to the scooper.

Abstract: A novel vibratory screening apparatus particularly adapted for the wet-screening of slurry mixtures containing particles and liquids, and more particularly to the separation of solid particles and liquids utilizes in combination a combined vibratory screening deck having a sieve bend portion upstream of an inclined substantially planar portion to effect substantial dewatering of the slurry mixture as it flows across the screening deck.

Abstract: Two flyweight shafts 12,22 are coupled by means of gears 18,30 each attached to one flyweight shaft 12,22 and two intermediate gears 54,56 each engaging one of these gears 18,30 and mesh with each other. Each of the intermediate gears 54, 56 is mounted on one of the oscillating cranks 32, 34 pivotably mounted on the associated flyweight shaft 12 and 22, respectively. The oscillating cranks 32 and 34 are held parallel to each other and can be pivoted to effect a relative phase displacement of the flyweight shafts 12, 22. The oscillating cranks 32,34 are provided with counterweights 62,64 and are thereby mass balanced to prevent oscillations from becoming effective on the oscillating cranks 32,34 and thus on the adjusting mechanism 60 during vibratory operation due to intertial forces.

Abstract: A vibratory power screen normally has a generally planar and longitudinally extending frame having upstream and downstream ends and a pair of laterally spaced side members extending longitudinally between the ends. A generally planar screen is spanned longitudinally within the frame normally between its ends. The entire frame is tilted down from the upstream to the downstream end. Thus when particulate material is loaded onto the screen at the upstream end the particulate material migrates down along the screen to the downstream end with the smaller fractions falling through the screen. This sieve has respective pivot plates rotatably supporting beater shafts on the side members of the frame for rotation about respective substantially parallel adjustment axes extending transversely of the frame underneath the screen. Beater arms, which extend parallel to the screen from the beater shafts, have outer ends which engage the underside of the screen.

Abstract: A vibratory apparatus comprises a shaft mounted for rotation about an axis and having weight structure mounted thereon to effect vibration in response to shaft rotation. The shaft may be initially balanced or unbalanced. According to a first series of embodiments, secondary movable weight structure is mounted on the shaft for outward movement against spring action when the rotational shaft velocity reaches a predetermined magnitude to reduce vibration caused by the primary weight structure. In another embodiment, combined weight/spring structure is utilized for the same purpose. Various other types of springs may be used. In this manner the vibrational amplitude of the apparatus is caused to vary as a function of the rotational velocity of the shaft.

Abstract: A vibratory screen apparatus is described for classifying loose solid material through horizontal screens 22-24 that are vibrated in elliptical paths by two independent eccentric weight means 28 and 30. The eccentric weight means 28 and 30 are mounted on the screen frame 15 elevationally below the center of gravity of the apparatus and upstream of the center of gravity toward the feed end. Each of the eccentric weight means include adjustable weights for adjusting the "throw" of the classifier that are outboard of bearings that support shafts that extend between the sides of the frame.

Abstract: A variable mechanical vibrator includes a first eccentric weight fixed to a rotatably mounted shaft. A second eccentric weight is rotatably mounted on the shaft, and the two weights are rotated together under control of mating engagement abutments, one carried by the shaft and one carried by or comprising a surface of the second eccentric weight. In one embodiment, first and second prime movers are used to rotate the shaft and the second eccentric weight, respectively; and when primary rotation of the shaft is effected by the first prime mover, the first and second eccentric weights are diametrically oppositely aligned with respect to one another on the shaft providing a balanced operation. In this mode of operation, the abutment carried by the shaft drives the abutment on the second weight to rotate such weight set with the shaft.

Abstract: An improved apparatus for vibrational conveyance, e.g., for sifting, cleaning or screening bulk or particulate material.

Abstract: A vibratory device has a vibrating chassis disposed horizontally or inclined and which is actuated by linear vibration by means of a vibrator having two unbalanced shafts rotating synchronously in opposite directions. For obtaining continuous regulation, during functional operation, of the reciprocal angular phase displacement of the unbalancing masses, the unbalanced shafts are connected with two drive shafts coupled by a chain. The two runs of the chain can be altered in length by adjustment of a pivoting lever.

Abstract: A vibrating screen apparatus of the type wherein bearing housing discs and associated gears are mounted on self-aligning bearings which are supported by fixed internal spindles, with the gears centered on the bearings, and hubs connect the bearing housing discs to shafts extending through the spindles. The screen apparatus has a plurality of unbalanced shaft assemblies to impart vibratory movement to screens and are adjusted as to the angle of stroke of vibration by adjusting, relative to one shaft assembly, gearing associated with that shaft assembly. In one embodiment, a cam crank turns a bearing housing disc relative to an outer gear mounted thereon and a second cam crank limits such turning. In a second embodiment, a pinion is maually turned to turn a driving gear relative to a bearing housing disc.

Abstract: A separator for separating solid particles from a gas stream in which they are entrained comprises a rotatable member on which the entrained particles impinge. The member rotates about a non-vertical axis. The rotatable member is mounted on a stationary body of the separator through the intermediary of resiliently deformable mounting elements which reduce the risk of excessive vibration occurring in consequence of the presence of an unbalanced mass on the rotatable member.