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 damping support structure for preventing vibrations of an apparatus table supporting an apparatus for manufacturing ultra-high precision devices such as semiconductors and printed circuit boards. The apparatus table is supported by a support deck suspended to be horizontally displaceable. Linear motors are actuated in response to vibrations of the apparatus table detected by vibration sensors. The apparatus table is thus displaceable relative to a stationary section, to be safeguarded against the vibrations.

Abstract: A control cable system with a device for damping vibration comprising a control cable an end of which is connected to a vibration source, a vibration member connected to another end of the control cable and a dynamic damper. The dynamic damper is attached on an element of the control cable and is tuned to have a special frequency characteristic. That is, the tuned damper vibrates when it receives a vibration having a frequency in a range including a plurality of resonance frequencies of the vibration member, and the damper resonates in response to a special resonance frequency in the range.

Abstract: A recoil diffuser (10) includes a plurality of weight elements (20, 22) and a plurality of plastic spring elements (30, 32, 40) fitted within a tube (12) to operate differentially upon being subjected to the forces of recoil as in a shotgun or the like. The end surfaces of the weight elements and of the plastic spring elements (see 24, 28) are shaped to optimize spring forces relative to displacement relative to overall size of the unit and mass of the weights.

Abstract: A vibration damping apparatus for a pulse motor having a movable member. The apparatus has a back plate fitted to the movable member of the pulse motor for serving as a base part of the apparatus, a first permanent magnet mounted on a flat plate portion of the back plate for transmitting movement of the motor to later stages of the vibration damping apparatus, and an inertia member disposed in opposed relation to the first permanent magnet and movable relative to the first permanent magnet in a plane parallel to the flat plate portion and having a second permanent magnet thereon magnetically coupled with the first permanent magnet, the inertia member having a natural frequency substantially equal to the natural frequency of the pulse motor without the inertia member.

Abstract: An oscillating apparatus comprises a cylinder, a piston reciprocatingly movably fitted in the cylinder, shaft members connected to the piston and extending out of the cylinder. The cylinder, piston and shaft members form an oscillator. An inlet and an outlet for an electro-rheological fluid are provided at each of two cylinder chambers defined in said cylinder by the piston. The apparatus further comprises voltage applying devices for applying electric voltage to the electro-rheological fluid passing through the inlets and outlets, respectively, so that applications of the voltage to the inlet of one cylinder chamber and the outlet of the other cylinder chamber are simultaneously effected and applications of the voltage to the inlets of both the cylinder chambers are alternately effected.

Abstract: A tuned vibration absorber comprises a laminated constrained layer beam formed from at least two rigid plates joined together by a layer of elastomer. One end of the laminated structure is mounted in a rigid base so that the laminated structure forms a cantilever constrained layer beam. The lamianted constrained beam is constructed so as to vibrate normal to the laminated structure at a resonance frequency that is to be dampened. The elastomer layer converts the vibrational kinetic energy into heat so that the heat can be removed. An array of tuned vibration absorbers is formed so as to damp a wide range of frequencies. The resonance frequencies of the tuned vibration absorbers are regularly spaced about the resonance frequency. The tuned array vibration absorber thus absorbs some of the vibrational kinetic energy and disperses the remainder over a wide range of frequencies to reduce the maximum amplitude of the vibrations that occur at any one frequency.

Abstract: Controllable electrorheological fluid composite structure elements incorporate electrorheological fluids as a structural component between opposing fluid containment layers to form at least a portion of any variety of extended mechanical systems such as plates, panels, beams and bars or structures including these elements. The electrorheological fluid is operatively contained in a region between the containment layers and has complex shear and tensile modulus properties which vary with the electric field applied thereto. A variable power source is utilized to create an electric potential between the layers of the structure element to create the electric field. An alternative power source may include the use of a piezoelectric material layer. In order to maintain the insulation and spacing between the containment layers, a fabric or separating layer having an open mesh is provided which permits the transportation of electrorheological fluid in the region between the layers.

Abstract: The fluid circuitry connecting variable volume chambers of the semiactive damper includes valve assemblies which collectively effect mechanical implementation of a preselected damper control policy that is based in part upon changes in the sign of the absolute velocity of a supported member of the system of which the damper forms a part. One of the valve assemblies has an inertial body which is connected to a movable system member but which remains substantially stationary during system operation. The inertial body and a valve member of the assembly are interconnected by a linkage which in one embodiment includes a frictional type connector, and which in another embodiment includes a dashpot.

Abstract: The invention disclosed utilizes distributed mass in an inertial archery bow stabilizer and vibration damper. It employs internal flow limiting structure and a high density fluid inertial mass. The device comprises two major subassemblies. The first subassembly is a stabilizing element which includes an elongated casing plugged at each end, and having therein the flow limiting structure, preferably in the form of baffles, and fluid to provide the arrow release stabilization and vibration damping effect, the latter being influenced in its action by the presence and design of the baffles. The second subassembly is a housing which holds the first subassembly and preferably comprises a rigid tube or outer housing, end plugs, mounting structure at one end of the tube, and a cushioning bushing. The thrust stabilization is achieved by the relatively large mass of high density fluid retained within the rigid tube enclosing the stabilizing subassembly.

Abstract: The present invention provides a nutation damper having a hollow ring-shaped container installed concentrically to the axis of spin of a spinning body, with a viscous fluid sealed inside, and partially filling the container so as to leave a gap. The volume of the viscous fluid is determined as less than or equal to 1/2 of the volume enclosed by the outer wall of the container. It can provide a nutation damper of simple construction which can damp nutation arising in high-speed spinning bodies and allow these spinning bodies to spin stably.

Abstract: Operation of a continuously variable semiactive damper of the system is modified so as to reduce generation in the system of undesirable shocks and noise. The modifications include delaying some or all of the changes in the on/off states of the damper, and/or limiting the rate and/or extent of changes in the damping coefficient of the damper at certain of the times when the damper is in an on state.

Abstract: An assembly for dampening shaft vibration and noise. An annular torsional damper is fixedly mounted to a cylindrical flange of a mounting adapter. The opposite ends of the adapter are cylindrically shaped and extend into the adjacent ends of a pair of shafts which are affixed thereto.

Abstract: Disclosed is a viscosity damper which includes a damper casing attached to a motor shaft to be driven therewith, a viscous fluid filled in the damper casing and a plurality of inertia bodies each having different diameters which are arranged in a co-axial relation with a space formed therebetween in the radial direction in the damper casing.

Abstract: Structures subject to seismic or other vibrations, such as structurally flexible elements of electrical and mechanical power plants, are effectively damped to reduce stresses resulting from such vibrations, by a system of auxiliary mass dampers. The dampers are advantageously connected to the regions of greater expected oscillation in response to such vibrations, to reduce structural stresses. A preferred auxiliary mass damper takes the form of a receptacle containing a fluent or granular material such as lead birdshot in mineral oil.

Abstract: A hydraulic mount has a pair of mounting members, an elastomeric body that connects the mounting members, an elastomeric diaphragm that is connected to one of the members and cooperates with the body to define a closed cavity, and a partition that divides the cavity into a chamber enclosed on one side by the partition and the elastomeric body and another chamber that is enclosed on one side by the partition and the diaphragm. A liquid fills the chambers and a damping orifice connects the chamber to provide damping by throttling liquid flow therethrough. The partition comprises a rigid singular imperforate body that is mounted at a cylindrical surface thereof for unrestrained reciprocal movement within prescribed limits in an interior cylindrical wall of one of the mounting members thereby to effect limited cyclic volume change in the chambers so that the liquid is not then forced through the damping orifice.

Abstract: A dual mode vibration isolator for reducing transmission of vibrations between a forward body and an aft body includes a mounting member positioned between the forward and aft bodies, a plurality of magnetic actuators each having an armature fixed to the forward body and a stator mounted on the mounting member, and a plurality of linear actuators pivotally connected between the aft body and the mounting member. The magnetic actuators support the forward body relative to the mounting member by magnetically supporting the armatures between paired stator cores in each stator. The magnetic actuators are controlled, preferably through local flux feedback loops, to permit the stators to vibrate relative to the armature without transmitting forces to the armatures, thus isolating the vibration of the aft body and mounting member from the forward body. The linear actuators extend and contract to reposition the forward body and mounting member relative to the aft body.

Abstract: A suspension system having elastic bearings for a drive assembly of a helicopter is described that has a belt drive that is arranged between an output shaft and a main rotor. This belt drive comprises a first drum that is connected with the output shaft and a second drum that is connected with an angular drive for the main rotor. Both drums are connected with respect to the drive by a tensionable belt. The suspension system comprises at least two bearings in the area of the belt drums as well as another bearing at the end of the assembly 1 that faces away from the belt drums. The three bearings have a spring rigidity coordination that controls the permitted rigid-body movements of the assembly. This coordination is such that limited swivel movements of the assembly can be carried out around the longitudinal axes of the belt drums as well as parallel lifting movements of the assembly can be carried out in vertical direction.

Abstract: An improvement to a torsion damping device, especially a double damped flywheel, for eliminating contact between the springs and one of the rotatable parts of the device when the springs tend to deform under the effect of centrifugal force. According to the invention, the springs, which are conventionally mounted between two pivoted thrust members, are each replaced by a damping device comprising two springs with a central insert between them, the insert being so shaped as to make contact with the inner surface of the spacing ring. The invention is applicable to an automobile transmission.

Abstract: A pendulum for suspending a swinging article from a support structure includes an elongated core having longitudinal ends, enlarged tension heads disposed on each of the longitudinal ends and operable to be engaged and supported by the article and the support structure, a plurality of stiff toroidal elements strung on the elongated core, one of the toroidal elements being a first end toroidal element which is spaced from one of the tension heads, another of the toroidal elements being a second toroidal element which is spaced from the other of the tension heads.

Abstract: An inertia damper having a mounting base to be mounted on a rotary shaft and an inertia weight component which is coupled to the mounting base through a vibration absorbing layer, the vibration absorbing layer being made of a gel material with a penetration valve of approximately 50 to 200. The inertia weight component is adhered to one surface of the vibration absorbing layer and the other surface of the vibration absorbing layer is adhered to the mounting base of the rotary shaft. A vibration wave generated at the rotary shaft side is dispersedly absorbed by deformation of gel material which forms the vibration absorbing layer and a vibratory component can be removed from a braking motion.

Abstract: A voice-coil linear actuator is embodied wherein the coil-driving structure is coupled to the driven structure (carriage) via a visco-elastic couple member (e.g., elastomeric bonding tape) that changes from an efficient motion-transmitter, at "operating" coil-generated vibration frequencies, to a poor motion-transmitter/good isolator (mechanical filter) at high frequencies, corresponding to resonant or other deleterious vibration.

Abstract: Large space structures are generally constructed of very stiff beams with little structural damping. Periodic activities such as instrument pointing can cause small beam deformations which can accumulate over time in the frequency vicinity of structural resonances. The beam vibration damping system is a low mass, add-on system of structure, sensors, actuators and controllers that measures and controls the lateral translational velocity of a damped point on the beam relative to a reference point on the beam. The beam vibration damping system mast structure is erected about normal to the beam at the reference point with a deformation measurement mechanism attached to the end mast structure displaced from the beam axis, and attached the damped point on the beam by a cable. A controlled tension mechanism is also attached to the end of the reference structure displaced from the beam axis, and is attached by a cable to the damped point on the beam.

Abstract: The damping of vibrations in a mechanical structure is accomplished while minimizing the impact on the design and operation of the structure through the use of a plurality of attachable vibration damping elements. Each vibration damping element contains: an accelerometer, an integrator, mixer, power amplifier, and a force actuator. The accelerometer measures the motion of the vibration in the structure at its attachment point and produces an acceleration measurement signal. The integrator integrates the acceleration measurement signal to produce a velocity measurement signal. The mixer produces a composite motion signal by mixing the acceleration measurement signal with the velocity measurement signal. The power amplifier adjusts the phase and amplitude of the composite motion signal to drive the force actuator to damp the sensed vibration along one dimension at the attachment point of the force actuator.

Abstract: The method comprises determining a first resonant frequency of a system comprising a vibratory body, a supporting body and a vibration damping device disposed therebetween. Vibrations at the first resonant frequency are dampened by defining first and second chambers in the device which are separate from each other and communicate with each other through a passage configured to impart a second resonant frequency to fluid received within the passage which substantially equals the first resonant frequency.

Abstract: In vehicles, it is usual that vibrations and noise occurring in the vehicle engine and transmission are propagated to the gear change lever via a transmission rod. To surmount these problems, an improved transmission rod consists of two axially separated parts, which are connected to each other via an articulation allowing transfer of both angular and axial movement between the rod parts. A spring element is arranged in a radial direction on each side of the articulation. The spring elements are in mutual co-action via a stiff connection which surrounds the spring elements and the articulation and is separated from the transmission rod parts by the spring elements.

Abstract: An isolator includes a load bearing part arranged for deflection against the action of a series of compression springs and tension springs whose axes are pivotal with respect to the axis of deflection. The arrangement is such that the isolator can operate in a range in which an incremental increase in deflection causing compression of springs is such as to result in an incremental decrease in the restoring force of springs resolved along the deflection axis. The tension springs produce an increasing restoring force throughout this range, and the net result is a load/deflection performance in which a region of zero or near zero stiffness of the entire system, along the deflection axis, is provided, bounded by regions of positive stiffness.

Abstract: A vibration damper for a road planer and the like with a main frame and a sub-frame movably connected thereto. A prime mover and a tool are mounted on the sub-frame, which includes frame members forming compartments adapted to receive lead shot particles therein. The particles absorb vibrational energy from the prime mover and the tool. A method of damping vibration is disclosed wherein vibrational energy is transmitted to the lead shot particles which vibrate and generate heat. The heat is dissipated through the frame members to the atmosphere.

Abstract: A vibration damped apparatus comprising a damping mass which is mechanically coupled to a member subject to vibration. The damping mass is formed from a elastic material throughout which a plurality of sub-masses are distributed. The sub-masses are relatively positioned so that the damping mass has different moduli of elasticity in tension and compression, so as to quickly dampen a broad frequency range of vibrations in the vibrating member. In a preferred embodiment, the vibrating member is a tubular post upon which vibration-sensitive optical components are mounted, the damping mass being disposed within a cavity in the post to damp vibrations of the post and optical components thereon.

Abstract: A suspension system consists of a suspension rod interposed between a vehicle body side member and a wheel side member to elastically connect them. The suspension rod includes a first elastomeric member connected to the vehicle body side member and defining a first fluid chamber. A second elastomeric member is provided in the suspension rod structure to be connected to the wheel side member, defining a second fluid chamber. The first and second fluid chambers are communicated with each other through a fluid communication passage. An incompressive fluid is filled in the first and second fluid chambers and in the fluid communication passage, thereby constituting a fluid dynamic damper for suppressing resonance vibration of the suspension system.

Abstract: A device preferably mounted to the rear section of a vehicle such as from the vehicle rear axle for stabilizing the vehicle in turns and skids and providing improved overall holding power of the vehicle to the roadway. The stabilizer operates on a hydraulic principle and comprises a housing that may be partially liquid filled such as with a hydraulic oil, although the stabilizer also is operative with the use of solely an air fill. A substantial weight mass is disposed in the housing and is responsive to centrifugal force such as occasioned by a vehicle turn, particularly an abrupt turn, to cause displacement thereof axially of the housing. The device further comprises a piston at each end of the housing and a spring associated therewith for biasing the piston to a normal rest position. The piston has an aperture to permit fluid bleeding between opposite sides thereof to enhance stabilizer action.

Abstract: A mechanical, vibration-preventing means to be used on mechanical and hydraulic presses, bar cutters, shearing machines and the like preferably cyclicly working machine tools with a pulse-like pressing process is adapted to absorb the stroke at punching and cutting in plates, bars, and the like articles of metal, plastics or another material by the resilient energy deriving from the deflection of the machine frame instead of being converted into vibrations and noise immediately after break through of the material being converted directly into rotational energy in a flywheel through a roller screw connection. This roller screw connection transforms the translatory movement of the machine tools into rotation.

Abstract: In an objective lens driving device, a movable member shiftable along and rotatable around a vertical shaft is provided for supporting the objective lens to be movable therewith vertically and horizontally. An electromagnetic driving means is provided for driving the movable member as desired. A damper member formed into an annular configuration symmetric around a central axis of a bearing portion provided on the movable member is provided between the movable member and a stationary portion of the device for damping and positioning the movable member for maintaining the objective lens to its neutral position.

Abstract: An objective lens drive/support mechanism in an optical disc player system includes an objective lens support member which is slidably and rotatably secured to a main shaft of the mechanism. An objective lens is supported by the objective lens support member at a position which is separated from the main shaft by a predetermined distance. The objective lens support member is driven to slide along the main shaft to perform the focus control, and the objective lens support member is rotated around the main shaft to perform the tracking operation. A symmetrically "8" shaped elastic damping member is tightly secured to the main shaft at the center of the symmetrically "8" shaped elastic damping member. Both ends of the symmetrically "8" shaped elastic damping member are fixed to the objective lens support member, whereby the single symmetrically "8" shaped elastic damping member conducts the damping operation in both the focal direction and the tracking direction.

Abstract: An inertia stop by which excessive movement between two members may be prevented, includes a unit that may be fixed to one of the members and a further unit that includes a free component and a component that may be fixed to the other of the members, one component being in the form of an externally threaded shaft and the other component being in the form of an internally threaded block that is loosely rotatable on, relatively to, the shaft with the threads engaging so that the free component may rotate relatively to the other between a position in which it is dissociated from the first unit and a position in which is engages with the first unit so that further rotation in that direction is prevented.

Abstract: A streamlined box girder type suspension bridge comprises a plurality of towers for supporting the cables, and the center main span and side spans comprising streamlined box girders suspended by a plurality of hangers from the cables. An additional mass of an appropriate weight comprising the material which would not directly contribute to the strength of the box girder is formed as a core at the predetermined portion of the box girder in order to suppress the bending-torsional flutter arising from the streamlined shape of the box girder, and the core extends over the complete span of the bridge symmetrically and with respect to the longitudinal axis thereof.

Abstract: A viscous vibration damper for a rotary shaft comprising an annular casing of stamped sheet metal and an endplate. The endplate comprises an inner annular hub portion for mounting the damper on the rotary shaft and an outer annular cover portion for closing the open end of the casing. The casing has an inner peripheral wall will a free end having an abutment zone for axial alignment of the casing on the endplate and a cylindrical surface cooperable with a cylindrical shoulder between the hub portion and the cover portion of the endplate for radial alignment of the casing. An inner annular weld is provided adjacent the resulting annular joint at the free end of the inner peripheral wall. An annular joint is also provided at the free end of the outer peripheral wall for axial alignment at the outer periphery of the cover portion and optionally for radial alignment. An annular weld seals the outer joint.

Abstract: A vibration-proofing device according to the present invention includes at least one fluid chamber in which fluid is filled between a vibrating member and a vibrated member. The fluid chamber is formed which expands and contracts from the vibration of the vibrating member. In the fluid within this fluid chamber, opposite phase pulsations are generated by means of a vibrator. The vibrator comprises an almost plate-shaped member fabricated from a magnetic material, which makes up one part of a partition forming the fluid chamber. The vibrator is activated by solenoids.

Abstract: A method and apparatus for reducing the low to mid frequency interior noise of a reinforced skin structure, such as the cabin of a jet aircraft, by reducing the vibration response of the structure to low to mid frequency disturbances is disclosed. Interior noise is reduced by forming the structure such that the skin panels bounded by reinforcing components have a higher fundamental frequency than the combined bending and tuning fork frequency of reinforcing components with spaced apart legs that support the skin; and, damping the bending, tuning fork and torsional vibration of the reinforcing components. Damping is accomplished by bridging the spaced apart legs of the reinforcing components with rigid elements, viscoelastically attached at either end to the legs. Preferably, the viscoelastic attachment is via flanges that extend outwardly from the legs.

Abstract: An a.c. contactor with an armature activated by a magnetic system, which is effectively connected to a return spring-loaded contactor onto which the movable contact component of the contact system is mounted. The contact carrier is herein fitted with an auxiliary mass and placed in effective contact with the armature by a coupling spring, wherein the auxiliary mass is movable in relationship to the contact carrier and an additional spacer bar component, with which the armature is coupled. The coupling spring supported on one end by the contact carrier, can on the other end connect to an offset end of the spacer component which is pressed against the auxiliary mass, whereby the auxiliary mass connects with a catch of a contact carrier or else is spring-loaded against the direction of motion of the contact carrier towards a stop on the contact carrier via a separate auxiliary spring. These improvements dampen and delay the recoil of the contact carrier experienced during switching of the a.c. contactor.

Abstract: A hydraulically damped motor mount for motor vehicles, and similar elastic supports having a controlled damping device, the free cross-sectional flow of which is statically closed off by a flexible diaphragm which is held with a certain freedom of movement between rigid support plates. In order to improve the acoustical behavior of such mountings, and to suppress the noise associated with the change in direction of the spring movements, the inner peripheral region of the support plates which embrace the diaphragm, and which overlap the edge of the latter, is provided with successive indentations in the form of gaps between teeth in such a way that the frictional forces generated by the approach of the diaphragm onto the support plates in the damping fluid is kept low. The inventive configuration of the support surfaces results in the elimination of undesirable tapping noises when the placement of the diaphragm has advanced partially.

Abstract: A reactive attitude stabilization system to be carried by a vehicle is provided where a first shaft is pivotally mounted on the vehicle in a normally horizontal relation. A second shaft is supported in horizontal relation at its midpoint by the first shaft and oriented perpendicular to the first shaft. Nonrotating slide bearings support a platform on the second shaft for translation of said second shaft relative to the platform. Resilient members oppose translation of the second shaft relative to the platform in either direction and normally maintain the intersection of the axes of the first and second shafts vertically above the center of gravity of the platform. An acceleration induced shift of the second shaft axially and horizontally relative to said platform causes a torque due to gravity to counteract the acceleration dependent torque.

Abstract: Damping apparatus within an actuator device in which a backstop is supported on one portion of a dual cantilever to match the movement of the impacting actuator to reduce wear and provide positive restoration of initial position, wherein the backstop-supporting cantilever portion is embedded in energy-absorbing elastomeric material that is symmetrically confined to shorten settling time of the actuator and remain unaffected by temperature changes.

Abstract: The invention relates to a universally movable suspension member for a direction indicating display system, especially for a gyro system (2), in which a bellows unit (1) is provided between a revolving disk (3) and the gyro system (2). The suspension member is designed as a double-bellows unit including two oppositely folded bellows (5, 6) so that, while a reliable and accurate indication is obtained, the volume of construction is decreased and the manufacturing costs are reduced.

Abstract: Disclosed is a vibration isolating table device in which a table body is supported on a base plate in the floating state through a vibration isolating device in order to isolate a tool or an instrument mounted on the table body from externally applied vibrations. In the vibration isolating table device, a magnetic plate and a magnet are respectively fixed on one and the other of mutually-opposite surfaces of the base plate and the table body so as to apply a force to the table body in the direction against an upward force applied to the table body by the vibration isolating device to thereby fix the table body. An end of a swing member is attached on the lower surface of the table body at the center portion thereof, and a weight is attached to the other end of the swinging member, so that the table body is caused to swing in response to an external force applied to the table body.

Abstract: An isolator for use in protecting buildings and other structures from the effects of vibration and shock due to an earthquake. The isolator comprises a stack of elastic bearings interconnected at their outer peripheries and located between and coupled to an upper plate and a lower plate. The junctions between adjacent elastic bearings and between the upper and lower elastic bearings and the upper and lower plates are provided with intermediate plates extending beyond the outer peripheries of the elastic bearings. The intermediate plates have aligned holes near their outer peripheries for receiving vertical rods whose lower ends are releasably coupled to rod-holding devices mounted on the lower plate. The rods provide lateral stiffness for the isolator and, by proper selection of the lengths of the rods, the stiffness of the isolator can be adjusted as desired.

Abstract: A first speed detecting means detects whether the engine speed has fallen below a prescribed level. A second speed detecting means detects whether an accelerator pedal angle has been changed at a speed higher than a predetermined value. A third speed detecting means is provided to detect whether the speed of the automobile is equal to, or higher than, a predetermined value. Upon receipt of the output signals from the first, second and third speed detecting means, a solenoid drive circuit drives engine vibration absorbers for a predetermined period of time. More specifically, the circuit energizes solenoids for this period. The solenoids rotate the thus rotary valves of the absorbers, thus closing the orifices of the absorbers. As a result, the absorbers generate great forces damping the back-and-forth motion of the engine. The vibrations of the engine are therefore not transmitted to the chassis of the automobile.

Abstract: A mirror vibration absorber for mirror assemblies mounted on motor vehicles comprises a ballast absorbing the vibration of the mirror assembly and disposed either inside or outside thereof. The position and weight of the ballast can be adjusted to the specific vibration frequency of the mirror assembly. The adjustment of the ballast position is made either by moving the adjustment of rods secured to the ballast relative to the mirror assembly or by moving the ballast relative to the adjustment rod. The ballast absorbs the mirror vibration and thereby reduces the need for reenforcing mounting hardware and braces.

Abstract: An inertial archery bow stabilizer and vibration dampner is disclosed. A stud is rigidly embedded in the archery bow and has an energy disipating rod fixed to and projecting forwardly of the stud. The rod is received within an encapsulating sealed cylinder having an internal chamber filled with a viscous fluid in which the rod is disposed. At its outer end and externally thereof, the cylinder is provided with another stud to which the archer may afix a selected stabilizing weight. The stabilizer is effective to limit bow movement during arrow cast and rapidly dampen and attenuate energy released as characterized by dampened bow vibration.

Abstract: A ski damper which can be inserted into a hole formed in the ski blade comprises a pair of housing portions which can be joined together from opposite sides of the blade to define a receptacle in which a disk is shiftable between a pair of foam rings. The disk is composed of a material having a specific gravity greater than 10 and has a thickness/diameter ratio between 1/3 and 1/30 and damps primarily vibrations in the frequency range between 100 and 200 Hz.