Abstract: A vibrator has two series of eccentric weights each comprising at least two weights turning in opposite directions and at least one motor coupled to the first series of weights by gearing and to the second series of weights by a transmission device including a phase-shifter in the form of two coaxial shafts each comprising helical teeth and an annular piston which slides between the two shafts, delimiting therewith at least one working chamber into which a pressurized hydraulic fluid can be injected. The piston has helical teeth meshing with those on the two shafts. The vibrator enables self-regulation of the amplitude of the vibrations that it produces according to the behavior of the object to which the vibrations are imparted.

Abstract: A special mixing machine readily mixes nail polish and other liquids. The efficient mixing machine has a vibrating head assembly comprising a resilient bonnet with a series of openings to receive bottles or other containers of nail polish or other liquids. The cost effective machine also has motion producing mechanism, such as an eccentrically weighted shaft driven by a motor, which provides a vibrating driver to vibrate the bonnet and rotate (spin) the bottles so as to uniformly mix the nail polish or other liquids without forming undesirable air bubbles and foam.

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: An asymmetric mechanical vibrator with external adjustment for vibrating screens and other equipments having a bearing housing fixable to a sidewall P of the equipment and supporting through bearings a central portion of a shaft, which has an end portion, inside the equipment, carrying a balance eccentric counterweight with fixed axial positioning and predetermined axial extension and mass, the shaft having an end portion outside the equipment and carrying a main eccentric counterweight placed nearer the bearing housing than the balance counterweight and having axial dimension and mass greater than those of the balance counterweight, the axial positioning, axial dimension and mass of the main counterweight being selectively variable to generate determined eccentric forces on the vibrator and the same bending moment equal to that produced by the balance counterweight.

Abstract: A counterweight assembly on a vertical, rotatably mounted shaft which is adjustable. First and second eccentric weight assemblies are fixed to the shaft. One of the eccentric weight assemblies includes a support fixed to the shaft to extend laterally of the shaft. The support has a ring of slots displaced laterally of the shaft. Two eccentric weights are rotatably mounted about the shaft and have pins extending to the ring of slots.

Abstract: A flask adapted to contain a pattern and sand is resiliently supported in a controlled orientation and vibrational forces are imparted to the flask including a horizontal force component causing generally horizontal oscillating movement of the flask and alternative oppositely directed vertical force components maintaining the flask in a controlled orientation during the generally horizontal oscillating movement thereof. The vertical force components are adapted to counteract rotational inertia of the flask, pattern and sand.

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: A vibrator including two axially parallel, interlocking, counterrotating unbalanced shafts. Both the phase relationship of the unbalanced shafts, and hence the direction of the vector of the directed vibrations, and the value of m.r., and hence the displacement of the vibrations of the compaction element connected to the vibrator, are variable. To this end, the unbalanced shafts are coupled by a hub that is disposed in a rotatable yet axially fixed manner on one of the unbalanced shafts and that has, in the wall surrounding the shaft, a groove that extends along the unbalanced shaft. A pin that is fixedly secured to the unbalanced shaft and that can be adjusted by a servomotor engages slidingly in the groove. The direction of operation of the driven unbalanced shaft is reversible. Each unbalanced shaft has an eccentric part that is fixedly mounted thereon and an eccentric part that is freely rotatable thereon over a predetermined angular range between extreme positions that are delimited by stops.

Abstract: A rotational force counterbalancing device comprising a weight linearly moveable between two impact points and mounted on a fruit tree shaker to dampen the attempt of an operating shaker to rotate in the direction of the aligned weights of the shaker. As the shaker attempts to move in one direction, the weight of the counterbalancing device moves in the opposite direction.

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: The invention provides a toner recovery apparatus, wherein toner on the surface of photoreceptor is removed by a cleaning device and collected in a container. The image forming apparatus includes a stationary member having a toner inlet end and an opposite end. The toner recovery apparatus comprises a driving device for reciprocatingly moving the container along the stationary member. Bumper means are fixed to the stationary member for colliding with the container when the container moves towards the opposite end for applying negative acceleration to stop the movement of the container.

Abstract: A contact lens cleaner includes a base, a vibrating plate mounted swingably on the base, a container mounted removably on the vibrating plate so as to receive an amount of a cleaning liquid and a contact lens therein, a motor disposed on the base so as to swing the vibrating plate, a cam member mounted rotatably on the base and having a cam surface which is engaged with the free end of the vibrating plate, and a resilient element biasing the free end of the vibrating plate toward the cam member. When the motor is started so as to rotate the cam member, the cam surface of the cam member pushes the free end of the vibrating plate to move in one direction, while the resilient element moves the free end of the vibrating plate in the opposite direction to engage with the cam surface of the cam member, so as to swing the vibrating plate, thereby rinsing the contact lens with the cleaning liquid.

Abstract: Applicant has discovered that the use of plastic gears in connection with metal gears on a main gear reduces the amount of friction between gear teeth and in addition reduces noise resulting from the assembly. Applicant's shaker herein requires a minimal amount of maintenance and will operate for long periods of time. Moreover, Applicant's shaker requires little or no lubrication. The gears may be disposed between the two parts of the housing and the eccentric weights outside the housing or visa versa.

Abstract: An unbalance vibrator comprises a drive shaft mounting unbalance weights, one of which is fixed stationary while the other one is turnable with respect to the drive shaft, and a mechanism for adjusting their mutual position made in the form of a rod spring-loaded in an axial direction and fitted in the movable unbalance weight so as to be movable radially, and adapted to interact with the other unbalance weight. The fixed unbalance weight is made in the form of a cylindrical sleeve having radial holes provided on its inside cylindrical surface. The movable unbalance weight is made in the form of at least a part of a cylinder arranged inside the cylinder, the rod being mounted so as to be engageable in one of the radial holes provided on the inside cylindrical surface of the sleeve.

Abstract: An unbalance vibrator including a drive shaft mounting unbalance weights, which are a clearance fit with respect to each other, and a mechanism for adjusting their mutual position. The adjusting mechanism is made in the form of two coaxially arranged cylinders carrying the unbalance weights and joined together by joining members provided on their engageable surfaces. One of the cylinders is rigidly mounted on the drive shaft, while the other cylinder is mounted so as to be turnable and axially traversable.

Abstract: A rolling rotor motor/compressor has a stator/cylinder with an internal rotor/piston. The stator/cylinder and rotor/piston together define a chamber and a vane extends into this chamber when the device is compressor. The rotor/piston has a pair of axially extending shafts and a pair of counterweights coact with the shafts for balancing while permitting radial movement of the rotor/piston within the stator/cylinder. This permits unloading of the compressor such as when there is a liquid slug.

Abstract: An elastic bar member is coupled to an orbiting mass oscillator and the entire assembly is suspended from a cable or the like such that the bar member has freedom of lateral motion and is nakedly immersed in a slurry having particulate material contained therein such as a mineral ore reject from which metal has been extracted. The rotor of the orbiting mass oscillator is driven at a speed such as to generate cycloidal sonic energy in the bar preferably at a frequency such as to set up resonant standing wave vibration of the bar in a cycloidal quadrature pattern. The cycloidal vibrational energy tends to set the surrounding fluid material into a whirling rotation or rotary traveling wave which facilitates the agglomeration or coagulation of the particles in the material and enhances the settling operation to make for more complete separation of the particles from the liquid.

Abstract: An elastic bar member is clamped to an orbiting mass oscillator and the entire assembly is suspended from a cable or the like such that the bar member has freedom of lateral motion and is nakedly immersed in a leachant having a material contained therein such as a mineral ore from which metal is to be extracted. The rotor of the orbiting mass oscillator is driven at a speed such as to generate cycloidal sonic energy in the bar preferably at a frequency such as to set up resonant standing wave vibration of the bar in a cycloidal nutating pattern. The cycloidal vibrational energy tends to set the surrounding fluid material into a whirling rotation or rotary traveling wave which facilitates the mixing of the ore and leachant and enhances the leaching operation to make for more complete separation of the mineral from the ore.

Abstract: A vibrating type concrete pipe making machine, in which very high frequencies of vibration and large inputs may be attained without excessive wear on the mold or shortened bearing life. It also includes lubricant and coolant systems which are combined into a single system.

Abstract: An apparatus for processing particulates comprises a vibratory bed including a motor with a vertically disposed shaft, separate remotely adjustable vibratory generating apparatus mounted on each end portion of the shaft and at least three contact structures between the vibratory bed and a flask or vessel containing the particulates. The uppermost vibratory generating apparatus being remotely adjustable to vary the horizontal vibratory force component and the lowermost vibratory generating apparatus being remotely adjustable to vary the vertical conical force component. The contact structures have conically shaped mating surfaces on pins and in recesses in sockets such that when at least one of the conically shaped surfaces are in contact the vessel is restrained to the same horizontal movement as the bed plate.

Abstract: Method and apparatus for clarifying bottled wine by riddling in which the bottles of wine are positioned in generally neck-down inverted position and are subjected to abrupt limited generally vertical force capable of dislodging sediment and solids from adherence to the interior surfaces of the bottles. The apparatus accomplishes the abrupt limited generally vertical force by either lifting and dropping a platform upon which cases of bottles are positioned, or bumping the platform from below. Control means automatically cycles the jouncing action, and supplementary vibratory action, through periods of timed duration and at desired frequencies and amplitudes, the bottles being allowed to remain quiescent for desired periods of time between jouncing actions.

Abstract: A paint shaker (1) for use in in-store paint tinting operations comprising a platform (2) and clamping member (4) for accommodating a paint container (3) which is to be shaken wherein the shaker is provided with means for sensing resistance to downwards movement of the clamping member (4a or 34) and clamping member detection means (34) which do not allow the shaking operation to start until the container is clamped and the clamping member is in a pre-selected position chosen because it is a position that the clamping member must occupy if it is to clamp a container properly either directly or via a capsule from which colorant has been expelled.

Abstract: This invention relates to vibratory machines such as grinding machines. A machine 10 has a vibratory unit 13 which is connected to a separate motor 12 by a flexible drive 14. The drive rotates a shaft 23 carrying eccentric weights 25,26 and the resultant gyratory movement is transmitted directly to a vibratory plate 16 through bearings 24. The amplitude vibration can be altered by adjusting the relative position of the weights.

Abstract: A fluidization apparatus for powder coating devices is provided which comprises a housing that is subdivided by a porous horizontal wall into an upper housing portion and a lower housing portion. The lower housing portion is provided with a compressed air feed. The upper housing portion is provided with a connecting conduit to an injector fed with compressed air and is provided with a powder feed above and through its cover. The lower housing portion is a cylinder having a circular floor area in which an air turbine is mounted and which includes an unbalanced mass. The upper housing portion is a cuboid having a quadratic floor area, whereby the length of a quadratic side corresponds to the length of the diameter of a filter mat having the shape of a circular disk, the filter mat separating the upper and lower housing portions.

Abstract: A cylindrical rotor is mounted for rotation in a raceway formed in the inside wall of a housing, the outside diameter of the rotor being only slightly less than the inside diameter of the raceway so that the rotor substantially fills the housing. One or more relatively high mass cylindrical rollers is each contained in a cavity or pocket formed in the outer wall of the rotor, each such roller being free to roll within its pocket and to move radially outwardly by virtue of the centrifugal force generated and to roll around in the raceway with the rotor and roller or rollers filling the housing and riding somewhat closely against the housing wall. This effectively fills all of the space in the housing and prevents the formation of a fluid filled "traveling" space in the housing thereby minimizing roller drag due to fluid turbulence.

Abstract: An elastic bar member is clamped to an orbiting mass oscillator and the entire assembly is suspended from a cable or the like such that the bar member has freedom of lateral motion and is nakedly immersed in a leachant having a material contained therein such as a mineral ore from which metal is to be extracted. The rotor of the orbiting mass oscillator is driven at a speed such as to generate cycloidal sonic energy in the bar preferably at a frequency such as to set up resonant standing wave vibration of the bar in a cycloidal nutating pattern. The cycloidal vibrational energy tends to set the surrounding fluid material into a whirling rotation or rotary traveling wave which facilitates the mixing of the ore and leachant and enhances the leaching operation to make for more complete separation of the mineral from the ore.

Abstract: Three or more (preferably an even number) of hollow vibration bars are joined together at one end thereof with the bars spaced from each other and with their longitudinal axes in substantially parallel relationship. Each of the bars has an unbalanced rotor mounted therein which when rotatably driven will generate vibrational energy in the associated bar. The similar rotors of the bars are phased with relationship to each other to generate a combined vibrational force pattern in a liquid in which the bars are immersed which affords optimum agitation of the liquid in an omnidirectional manner. The vibration at the juncture between the multiple bars is kept at a minimum by virtue of the cancellation of the force vectors generated by the bar members at this point.

Abstract: A hand-operated forward-reverse vibrating plate compactor which includes a vibrating assembly having two counter-rotating eccentrics. The vibrational force generated by the eccentrics is directional and the forward and reverse motion of the vibrating plate compactor is achieved by changing the phase position of the eccentrics relative to each other. This change in the phase position is accomplished smoothly by means of a hydraulic servo control system which permits a continuously variable adjustment of the speed and intensity of the vibration of the vibrating plate compactor to be made.

Abstract: A variably unbalanced rotating mechanism comprising a frame, a main shaft having a longitudinal axis and supported on the frame for rotation about the longitudinal axis, a drive for rotating the main shaft, first and second eccentric weights mounted for rotation coaxially with the main shaft, and a mechanism for rotating the weights in common with the main shaft and for selectively rotating the weights in opposite directions relative to each other and relative to the main shaft and independently of main shaft rotation.

Abstract: A dual shaft pan mixer comprises a mixing vessel (1) having a first and a second pan section (3 and 4), a pair of paddle assemblies (10) having drive shafts (13) which are disposed horizontally and in paralllel relationship with each other within the mixing vessel (1) and adapted to rotate in mutually opposite directions, and a drive source (20) for synchronously driving the pair of paddle assemblies (10). The mixing vessel (1) includes a substantially triangular space (22) below an area intermediate the first and the second pan section and displaced out of the loci of rotation of the paddle assemblies (10), and also includes a discharge port (5) which is disposed adjacent to the space (22). The mixer also comprises a rod-shaped vibration generator (30) disposed within the space (22) and extending in a direction parallel to the drive shafts (13).

Abstract: A poker vibrator includes an extra weight which is mounted on the hose accommodating the power supply of the vibrator of the poker vibrator assembly connected to the end of the hose. The extra weight is mounted on the hose in the vicinity of the casing. the extra weight is also in the area of the hose where it is manually held by the operator when using the poker vibrator. The poker vibrator equipped with the extra weight prevents or at least damps the vibration amplitude and with it the intensity of the vibration in the area of the hose manually held by the operator.

Abstract: The subassembly comprises a shaft having an eccentrically-weighted portion journalled in a tube which also has an eccentrically-weighted portion. The tube has an abutment therein which prevents full rotation of the tube relative to the shaft. With rotation of the tube in one direction, its abutment, at one side, comes into engagement with the eccentrically-weighted portion of the shaft and, consequently, both portions are in proximity and radially aligned to produce a maximum, oscillatory vibration. Tube rotation in the opposite direction causes the shaft portion to engage the other side of the abutment and, consequently, the portions are in opposite, radial dispositions, and produce a minimum, oscillatory vibration.

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 liquid impervious covering such as a plastic membrane or a concrete flooring is installed over an extensive substantially level area of ground and mined metal ore heaped onto this covering to form a mound. A leachant liquid solution is poured onto the ore and permitted to thoroughly penetrate the ore material. This end result is achieved either by forming a crater on the top of the ore material which is filled with the leachant solution which is allowed to ooze through the ore material, or by feeding the solution from sprinklers located around the mound until the ore material is thoroughly wetted. When the ore material has been wetted with the leachant, sonic energy is applied to the ore material by means of a sonically excited elastic pipe or bar member which is lowered into the mound by means of a crane and sonically driven by means of an orbiting mass oscillator.

Abstract: There is provided an apparatus for controlling the oscillations of a continuous pour ingot mold which comprises at least one eccentric having a sleeve with an eccentric boring mounted to rotate on an off-center portion of a shaft. In order to eliminate the drawbacks resulting from the existence of a play between the sleeve and the shaft, the sleeve is so clamped on an off-centered shaft portion as to cancel the clamping constraints to allow the rotation of the sleeve on the shaft when the eccentricity is to be adjusted.

Abstract: A vibrator with vibratory action for the vibration of objects is described, where the vibrator is provided with an attachment device for attaching to the object which is to be vibrated, and is distinguished in that the attachment device constitutes a magnet, preferably an electromagnet.

Abstract: A paint shaker has a base on which is mounted a motor support plate by four vertical compression springs. A vertically oriented electric motor depends from the motor mounting plate and has an eccentric flyweight secured to its output shaft above the motor mounting plate. A container support plate is mounted on the motor support plate by four additional vertical compression springs that are stiffer than the lower springs. A frame structure is mounted on the container support plate to enable clamping one or more containers thereon.

Abstract: A method and apparatus for mechanically accomplishing riddling of bottled wines contained in shipping cartons by inverting pallet loads of the cartons so the bottles stand on their capped ends, jostling the bottles as by rapid tilting at predetermined intervals and in predetermined directions, and vibrating the cases and the bottles they contain at desired frequency and amplitude and for periods of predetermined duration. The apparatus provides a bed for receiving pallets loaded with stacked cases of bottled wine to be riddled, the bed being supported at its corners on pivot balls liftable from their supporting sockets which, in turn, have resilient supports. Selective tilting of the bed and its cargo is accomplished by inflatable air bags controlled by a timing system.

Abstract: This invention pertains to induced vibration and the dampening of these vibrations in the motor means. Vibration induced by rotating a shaft having eccentric weights thereon has been used to produce all kinds of shaking apparatus including large car shakers in which the induced force may be as much as eight thousand two hundred pounds. These vibrations can be as much as five thousand six hundred vibrations per minute and can be used for huge bins and hoppers in which the capacity may be as much as one hundred fifty thousand pounds. Vibrators using air, electric or hydraulic motors can be tuned or adjusted to provide the desired results. Most of these vibrators using a tuned motor may be temporarily or permanently attached. Motor driven vibrators, as far as is known, transmits the vibrational force into the shaft of the motor. Said motors, which are usually standard off-the-shelf units have their rotor bearings designed for rotary motion rather than combined with a vibratory force.

Abstract: This invention pertains to induced vibration and the dampening of these vibrations in the motor means. Vibration induced by rotating a shaft having eccentric weight thereon has been used to produce all kinds of shaking apparatus including large car shakers in which the induced force may be as much as eight thousand two hundred pounds. These vibrations can be as much as five thousand six hundred vibrations per minute and can be used for huge bins and hoppers in which the capacity may be as much as one hundred fifty thousand pounds. Vibrators using air, electric or hydraulic motors can be tuned or adjusted to provide the desired results. Most of these vibrators using a tuned motor may be temporarily or permanently attached. Motor driven vibrators, as far as is known, transmits the vibrational force into the shaft of the motor. Said motors, which are usually standard off-the-shelf units have their rotor bearings designed for rotary motion rather than combined with or added vibratory force.

Abstract: A road compacting drum is equipped with a dual amplitude, rotational, vibratory mechanism. A shaft rotatably mounted on the drum supports eccentric weights. Casings secured to the shaft adjacent the weights have chambers accommodating fluent mass. The fluent mass comprise metal members, as steel balls, shot or liquid metal, that move to a first location in the chamber upon rotation of the shaft in one direction to increase the amplitude of the vibration of the shaft and drum. The fluent mass flows to a second location in the chamber in response to rotation of the shaft in a direction opposite the one direction to generally balance the shaft to reduce the amplitude of vibration of the shaft and drum.

Abstract: This invention pertains to induced vibration and the dampening of these vibrations in the motor means. Vibration induced by rotating a shaft having eccentric weight thereon has been used to produce all kinds of shaking apparatus including large car shakers in which the induced force may be as much as eight thousand two hundred pounds. These vibrations can be as much as five thousand six hundred vibrations per minute and can be used for huge bins and hoppers in which the capacity may be as much as one hundred fifty thousand pounds. Vibrators using air, electric or hydraulic motors can be tuned or adjusted to provide the desired results. Most of these vibrators using a tuned motor may be temporarily or permanently attached. Motor driven vibrators, as far as is known, transmits the vibrational force into the shaft of the motor. Said motors, which are usually standard off-the-shelf units have their rotor bearings designed for rotary motion rather than combined with or added vibratory force.

Abstract: On the rotary output shaft of a variable-speed electric motor, there is fixed a sector-shaped weight. On the weight body, diametrically opposite its principal mass there is provided a radial projection provided with a radially extending cavity in which there is slidingly received at the radially inner end a weight. A plunger is pressed by a spring against the slidable weight and projects radially outwardly of the cavity. As the motor output shaft rotates more quickly, the slidable weight slides radially outwards, resiliently compressing the spring and extending the plunger. As the motor output shaft is slowed in rotation speed, the spring recovers, withdrawing the plunger and pushing the sliding weight back towards the shaft. In an elaboration, the plunger is provided outside the cavity with a device for adjustably pre-compressing the spring by pulling out the plunger by a variable amount.

Abstract: This invention relates to a process for the desorption of spent solid adsorbent through heating the latter to desorption temperature by means of a hot granular heat carrier medium; particularly of activated coal or activated coke used for flue gas purification by adsorption in power plants, for example.

Abstract: A unit, which generates sonic energy for use in the leaching or extraction of minerals from ore, is mounted in a tank which contains the leaching solution and the ore. The unit has a housing in which a solid bar is supported by means of a rod which fits into a bored out bottom portion of the bar which is along the longitudinal axis thereof, as well as a plurality of resilient lateral spoke members which protrude inwardly from the housing and abut against the bar. An orbiting mass oscillator is mounted on the bar on the top end thereof and is rotatably driven to effect resonant standing wave vibration of the bar in a quadrature nutating vibration mode. The oscillator is positioned above the leaching solution and the ore so that it is free therefrom, the rod member used to support the bar and the resilient lateral support members being abutted against the bar at nodes of the standing wave vibration pattern established in the bar to minimize energy losses into the housing.

Abstract: Vibrations having a frequency exceeding 150 Hertz are established in a rigid body by means of a vibrator system that in one embodiment includes a pair of rotating wheels, only one of which has a weighted eccentric secured to its axle. The wheels are coupled together by an endless belt made of a material that dampens the vibrations propagating between the wheels. The unweighted wheel is driven by a flexible shaft connected to its axle. In another embodiment three wheels are used in which two are weighted at the axles. The vibrator system may be used to sink pipes and the like into the ground, or shake a sorting table employed, for example, in the mining industry or a silo hopper for discharging grain. Also disclosed is a method for sinking a pipe or the like into the ground and retrieving it after lowering it a predetermined distance. In this method, wires are attached at each end of the pipe for facilitating its downward motion and its retrieval.

Abstract: In the embodiment shown, the assembly comprises a pair of apertured weights mounted on a rotatable shaft, each of the weights having abutment surfaces one or another pairs of which close upon each other, depending upon the direction of shaft rotation. One of the weights is keyed to the shaft to rotate therewith; the other weight is freely rotatable relative to the shaft. Upon rotation of the shaft in a first direction, a first pair of the abutment surfaces engage, and the eccentricities of the weights then are so disposed as to produce a given-amplitude vibratory force. Upon rotation of the shaft in a contrary direction, a second pair of the abutment surfaces engage, and the eccentricities of the weights then are so disposed as to produce a vibratory force of a differing amplitude.

Abstract: A method is disclosed for providing optimal compaction of various materials by controlling the vibration amplitude of an adjustable amplitude vibratory roller. The vibration amplitude is automatically reduced when excessively high jolting forces are sensed by transducers carried by the roller or its frame. The apparatus for carrying out the method includes a continuously adjustable eccentric element in the vibratory roller, at least two signal transducers mounted on the roller drum or frame and axially separated, to generate signals representing the vibrational movement of the roller. A regulating system responsive to the signals from the signal transducers reset the adjustable eccentric element to vary the vibration amplitude and provide optimal compaction.

Abstract: An automatic dental amalgam dispenser-mixer comprising a first reservoir for silver powder and a second reservoir for mercury, dispensing and metering means for each material, and a mixer equipped with a recovery cup at its outlet. The dispensing and metering means includes a pair of separate conveyors--one for the silver powder and one for the mercury--each rotationally mounted in a sleeve having an inlet in communication with the associated reservoir and an outlet leading to the mixer. The rotational movement of each of the conveyors is separately controlled through stepping motors. An electronic control unit has a stored program for controlling the actuation of each of the conveyors and the mixer, and a keyboard and display for entry of the parameters of the desired mixture.

Abstract: A vibratory apparatus in which the amplitude of vibration is continuously adjustable, includes a tubular rotatable shaft journalled in the member to be vibrated, and at least one elongated and flexible eccentric mass element disposed in the tubular shaft. The eccentric mass element is guided along guide surfaces, arranged so that part of the eccentric mass element is urged by centrifugal force away from the axis of the tubular shaft when the shaft is rotating. An adjustment means is coupled to the eccentric element to control the position of the element along the slide surfaces, to thereby vary the vibration amplitude of the vibrating tubular shaft.