Abstract: A fluid mount (10) for an exposure apparatus (32) includes a first subsystem (12) and a second subsystem (14). The first subsystem (12) includes a first cylinder (18) and a first piston (20). The first piston (20) moves within the first cylinder (18) along a first axis (26). The second subsystem (14) includes a second cylinder (22) and a second piston (24). The second piston (24) moves within the second cylinder (22) along a second axis (28). Importantly, (i) the second subsystem (14) is stacked on top of the first subsystem (12), (ii) the second axis (28) is substantially coaxial with the first axis (26), and (iii) the first piston (20) is connected to the second piston (24) with a piston connector (16). The resulting fluid mount (10) has a relatively high load carrying capacity and a relatively small footprint.

Abstract: A seat assembly for a motor vehicle includes an air spring suspension system for effectively isolating the occupant of the vehicle's seat from shock, vibration and inertial forces directed along both a vertical axis and a horizontal axis. A stationary base plate member is attached to the floor of the vehicle and it supports a pivot linkage assembly joining the stationary base member to a movable base member. An air spring is disposed between the stationary base member and the movable base member to displace the movable base member in a generally vertical direction to an extent allowed by the linkage assembly. Supported atop the movable base member is a seat slide assembly that permits fore and aft adjustment of seat position within the vehicle. A vehicle seat mount is affixed to the pair of slide members and includes shock absorbing springs that are disposed between the slide members and the vehicle seat mount for cushioning inertial forces due to acceleration and braking.

Abstract: An improvement in the structure of an anti-shock device utilized for buildings, important structures and bridge structures that includes a base, a carrier, a slide block, and a plurality of springs. A slip concavity of a sunken round curved recess is respectively formed in the base top surface and in the carrier bottom surface, and an upper slide block member and a lower slide block member are situated between the two slip concavities. One contact surface between the two slide block members and slip concavities is of a curved contour and the other surfaces are indented seating recesses. A spheroid coupling bearing is nested between the two seating recesses and the upper and lower slide block members are held together by the springs. As so assembled, the anti-shock device base is fastened under the columns of a building structure such that the building achieves the objectives of exceptional shock eliminating capability and greater building structure safety.

Abstract: An earthquake energy eliminator is constructed to include two bearing plates respectively disposed at top and bottom sides, the bearing plates each having a plurality of mounting holes, and a plurality of connecting plates connected between the bearing plates, the connecting plates each having respective top and bottom sides respectively fitted into the mounting holes of the bearing plates and at least one opening spaced between bearing plates.

Abstract: An assembly is disclosed for protecting and supporting a fragile thermometer having a column and an integral flange base. The assembly includes a support base defining a threaded bore for receiving the integral flange base of the thermometer. A bottom cushioning pad is also provided for placement in the bottom of the bore. In addition, a ring-shaped upper cushioning pad is provided for being fitted over the column of the thermometer and against the top surface of the thermometer's flange base. The thermometer is secured to the protective support base with a threaded collar member which receives the thermometer column and is threaded into the threaded bore of the support base which secures the thermometer to the base. An adapter bushing may also be used to attach thermometers having smaller diameter columns to the base.

Abstract: The invention relates to a disc drive system which includes cushioning material positioned between the interior of disc drive housing and a disc drive. Such a system advantageously provides a removable disc drive system which isolates shocks from the disc drive. The disc drive system includes a housing bottom, a mounting plate coupled to the housing bottom, and a disc drive coupled to the mounting plate via cushioning pieces.

Abstract: The present invention relates to an apparatus that will dampen vibration and sound created by heavy machinery, such as metal presses, metal stampers, and HVAC units, as well as limit lateral movement of the heavy machinery based upon a combination of a multiplicity of air springs and rigid cylinders. The present invention provides the simplest method of dampening vibrations and sounds created by heavy machinery. The present invention further prevents lateral movement of the machinery, while simultaneously providing a means to protect such machinery against seismic events by absorbing the seismic forces.

Abstract: A stabilization device for a rear-view mirror of a motor vehicle includes a mirror set (1) having a sleeve (41) incorporated in a support structure (20) of the mirror set (1) and articulated in a pivot post (60) of a base member (70). The device proportions and determines the stabilization of the mirror set through an axially squeezing “F’ force to the pivot post (60) of the mirror set (1). The sleeve has a first indented surface (42) and a second indented surface (43) in the base (70) that is adjacent to the first indented surface (42). The first and second indented surfaces (42, 43) have corresponding profiles to engage one in the other. An axial compression spring (44) disposed about the pivot post (60) presses the sleeve (41) to couple the surface (42) of the mirror set (1) in the indented surface (43) of the base (70). A reaction washer (45), fixed around the pivot post (60), presses against the spring (44). The pivot post (60) has an intermediary radial hole (62).

Abstract: Torque roll, such as in a marine propulsion unit for driving a propeller, is significantly reduced or substantially eliminated by utilizing inflatable elements, such as airbags. One or more airbags engage the top of a propulsion unit mounting surface supported by an elastomeric isolation mount where a torque roll force is substantially upward, and one or more other airbags engage the bottom of a mount for the propulsion unit at a location where the torque roll force is substantially downward. The amount of gas supplied to the airbags is preferably substantially proportional to the torque roll force at each of the airbags. By significantly reducing or substantially eliminating the torque roll of the propulsion unit, the unit can be connected to other components without line shaft couplings.

Abstract: A vibration isolator that has an elastomer which couples a support plate to a piston. The elastomer can provide horizontal damping of a payload that is coupled to the support plate. The piston can move within a first housing inner chamber that is in fluid communication with a second housing inner chamber. The chambers are pressurized with air that can flow to dampen vertical movement of the piston. The vibration isolator of the present invention thus provides both vertical and horizontal damping without using any oils.

Abstract: Multiple isolators are configured with respect to an assembly (101), such as a sensor assembly in an inertial navigation system or other system where cross-axis acceleration or rotation coupling is undesirable. The system utilizes a set of isolators (203, 209, 215, and 221; 305, 307, 311, 313, 317, 319, 323, 325; or 403, 405, 407, 411, 413, and 415) that are substantially matched to each other, but may have uncorrelated axial stiffness and radial stiffness. The system configuration does not introduce cross-axis coupling, such as cross-axis translational coupling and cross-axis rotational coupling.

Abstract: An adapter bracket is configured for mounting a relatively small electronic device, such as a 3½-inch drive device in a bay within a frame structure configured for mounting a relatively large electronic device, such as a 5¼-inch drive device. The relatively small electronic device is mounted either by means of screws extending upward through the bracket into holes within the lower surface of the small drive device, or by means of screws extending through elastomeric grommets, mounted within the adapter bracket, into holes within the sides of the small drive device. The adapter bracket also includes sidewalls that are mounted within the bay in the manner of a standard version of the relatively large electronic device.

Abstract: A computer system is provided comprising a support frame, a logic board mounted to the support frame, a processor on the logic board, a cathode ray tube mounted to the support frame above a plane of the logic board, and a transparent housing located over the cathode ray tube.

Abstract: In a vehicle door mirror assembly, an outer mirror-holder that holds a rearview mirror is mounted to an inner mirror-holder attached to a vehicle body side. Elastic tabs disposed at the outer mirror-holder elastically press an abutment portion of the inner mirror-holder. Thus, it is possible to maintain an excellent assembled state with respect to the inner mirror-holder and the outer mirror-holder, and to reduce loosening between the inner mirror-holder and the outer mirror-holder. It is therefore also possible to suppress vibration of the mirror with respect to the inner mirror-holder and to improve anti-chattering performance of the mirror.

Abstract: The invention provides novel equipment packages, principally for portable equipment such as laptop computers, which provide decoupling, damping and shock isolation of acceleration sensitive components within the packages. Two principal embodiments are disclosed. In the flexible shell embodiment, a plurality of flexible fillers are attached to a flexible shell and a plurality of objects or components are attached to the fillers. In the flexible chassis embodiment, a plurality of objects or components are mounted to the flexible chassis to form an assembly and a plurality of flexible fillers are attached to the chassis to form the complete package. One design methodology employs a decoupled simple harmonic oscillator (SHO) model to optimize the shock response behavior. A second design methodology uses a deterministic method (finite element method) to establish the parameters for the filler and shell materials.

Abstract: An isolation platform assembly (10) for a vehicle (V) on which is mounted instruments and sensors (S). The instruments and sensors are installed on a gimbal (G). A mounting bracket (12a-12c) attaches the assembly to the vehicle. The unit further includes a platform or plate (14) to which the gimbal is attached. The plate connects to the bracket by cable isolators (62) which attenuate shock and vibration forces transmitted through the vehicle. This protects the instrument and sensor packages from shock and vibration damage, particularly when the vehicle is moving. It also allows the instruments and sensors to be used to obtain information both while the vehicle is parked and while it is moving. The assembly further includes a restraint mechanism (64) comprising torsion bars (66, 72) and levers (74, 108) which connect the platform to the mounting bracketry so to enable the instrumentation and sensor payload to be moved from one orientation to another for data acquisition.

Abstract: A device for supporting two constructional elements against each other consisting of at least one upset tube arranged between pressure transmitting plates located at the ends of the tube for the purpose of limiting inward and outward bulging. The upset tube is coaxially arranged between two supporting tubes having a smaller length than the upset tube of which the external supporting tube encloses the upset tube at a radial distance.

Abstract: The invention concerns a launch vehicle comprising a shroud (1a, 5a) supporting auxiliary propellers (2, 3) applying in operation excess flow of stresses to the shroud (1a, 5a), said device comprising means for coupling the payload (4) with the launch vehicle shroud. The invention is characterized in that the coupling means are designed to ensure a mechanical coupling between the payload (4) and the shroud along the direction of the launch vehicle longitudinal axis (X), and to cause them to be disengaged along radial and tangential directions. The invention is useful for neutralizing the effects on the payload of excess stresses applied on the launch vehicle shroud by the auxiliary propellers (2, 3).

Abstract: An energy absorbing structural laminate comprising: (a) a first layer of composite material comprising x1 plies; wherein at least 0.5x1 plies contain fibers arranged in a shape of a continuous curve; wherein said continuous curve is the same or different in different plies; (b) a second layer of composite material comprising x2 plies; wherein at least 0.5x2 plies contain fibers arranged in a shape of a continuous curve; wherein said continuous curve is the same or different in different plies; and (c) a viscoelastic layer disposed between the first and second layers such that shear strains are substantially distributed throughout the viscoelastic layer when a load is applied to the structural laminate.

Abstract: A split foot damper for damping vibrational energy on a tension mask having a border with an edge. The apparatus has a first element having a first portion in moveable contact with a surface of the border and a second portion in moveable contact with the edge of the border, and a second element having a third portion in moveable contact with the surface of the border and a fourth portion in moveable contact with the edge of the border, where the two elements are connected to each other at a point that is affixed to the surface of the border. As the mask vibrates, the vibrational energy is transferred to the split foot damper, wherein vibrational energy is dissipated as the portions of the split foot damper makes contact against the surface and edge of the border.

Abstract: An electronic apparatus including a first unit and a second unit connected to the first unit. The first unit having an electronic device and a first supporting member. The second unit having a vibration generating device and a second supporting member. A first damper is attached to the first supporting member. A second damper is attached to the second supporting member.

Abstract: The present invention relates to a suspension device (4) for connecting an item of on-board equipment (2) to the structure (3) of a vehicle, particularly a rotary-wing aircraft, said suspension device (4) comprising first and second parts (5, 6) shaped in the form of plates and capable of being fixed to said structure (3) and to said item of equipment (2), and suspension means (7) which are arranged between said first and second parts (5, 6). According to the invention, the suspension device (4) additionally comprises a locking system (20) capable of bringing the suspension device (4) into one of two positions: a locked position in which the locking system (20) immobilizes the first and second parts (5, 6) one with respect to the other, and an unlocked position in which the locking system (20) releases said parts (5, 6) so that they can move relative to one another, and means (21) for controlling the locking system (20).

Abstract: A hard disk drive assembly for a portable computer includes a conventional small form factor hard disk drive which is mounted in a rigid housing; the housing is mounted to the portable computer chassis. The hard disk drive itself is shock and vibration protected from the housing by a set of thin shock pads of a shock absorbing material such as a viscoelastic polymer. The pads are e.g., 1 or 2 mm thick, typically no more than 5 mm thick. The pads are each relatively small in surface area and are interposed between all surfaces of the hard disk drive and the opposing surfaces of the housing, thereby suspending the hard disk drive in the housing with shock and vibration protection, without the shock pads themselves occupying a significant volume.

Abstract: A computing device is disclosed. The computing device includes a shock mount assembly that is configured to provide impact absorption to sensitive components such as a display and an optical disk drive. The computing device also includes an enclosureless optical disk drive that is housed by an enclosure and other structures of the computing device. The computing device further includes a heat transfer system that removes heat from a heat producing element of the computing device. The heat transfer system is configured to thermally couple the heat producing element to a structural member of the computing device so as to sink heat through the structural member, which generally has a large surface area for dissipating the heat.

Abstract: Resilient shock absorbing pads that fully support ground contacting portions of machines, equipment or other loads and, thereby, provide protection from shocks and vibration. The pads receive the ground contacting portions of a load, such as a base plate. Described pads are square-shaped and are substantially formed of a resilient shock and vibration absorbing material, such as elastomer. It is particularly preferred that the pads be fashioned from compression-molded crumb rubber that is readily available from recycled tires. The pads also include structures, such as recessed portions or an upwardly extending rigid dowel, that help to stabilize a load.

Abstract: The present invention relates to a shockproof device of a hard disk drive in which a plurality of springs are mounted on slide rail seats at sides of hard disk drive of notebook computer in order that the hard disk drive is disposed in a hanging arrangement. Besides, the inner five sides (except the hard disk drive extraction side) of the hard disk drive housing are provided with shock-absorbing blocks for improving the shockproof function. In addition, two sides of the hard disk drive housing are fitted with the slide rail seats for the convenient extraction of the hard disk drive. Accordingly, a better shockproof effect is achieved.

Abstract: A portable information processing apparatus is configured to dissipate heat generated in a cabinet mainly from a part which a user hardly touches, and thus the temperature at a palm rest is suppressed. The cabinet includes a heat conducting spacer 16 provided over a heat-generating component 15 to conduct heat thereof, a heat absorption area 10ah to absorb the heat of the heat-generating component 15 through the heat conducting spacer 16, and a heat conduction obstructing area 10rb provided on a heat conduction path between the heat absorption area 10ah and the palm rest 11 to reduce a cross-sectional area of the heat conduction path. Accordingly, heat conduction from the high-temperature heat generating component 15 to the palm rest 11 is restricted, and thus the temperature of the palm rest 11 can be limited.

Abstract: A method supporting a printed circuit board, including the step of causing a contact portion of at least one board supporting member including a vibration damping portion formed of a vibration damping rubber, to contact at least one portion of a lower surface of the printed circuit board and thereby support the printed circuit board on a side of the lower surface thereof.

Abstract: An electronic apparatus has a vibration-sensitive constructional unit accommodated in a housing, the housing and the vibration-sensitive constructional unit being coupled by damping apparatus. In order to reduce the vibration clearance of the vibration-sensitive constructional unit the damping apparatus includes at least one spring arrangement having a spring characteristic which is progressive in all three directions in space.

Abstract: A seat suspension method in one approach involves applying a dampening force over less than the full range over which a seat may be raised and lowered by a seat height adjuster. The step of applying a dampening force may comprise applying such a force which varies non-linearly, depending upon the extent a seat moves as a result of seat vibration. In several specific approaches, unlatching of the dampening mechanism may be accomplished to permit relative movement of the seat and seat support mechanism during seat height adjustment. Relatching of the vibration damper may be accomplished to again apply a dampening force. The seat may automatically be returned toward a desired elevation in the event loading on the seat is varied, for example if a seat occupant leaves the seat.

Abstract: An inwardly directed wall projection that comprises a supporting edge proceeding parallel to the insertion direction and an aperture for a screw to be applied from the outside is provided at one of the two side walls of a cage-like chassis for the acceptance of at least one horizontally introducible drive carrier securable with a screwed connection. Spring elements are provided at the opposite side wall, so that the drive carrier pulled against the wall projection with the screw is secured parallel to the insertion direction free of play and protected against twisting.

Abstract: A highly damped kinematic coupling for precision instruments. The kinematic coupling provides support while causing essentially no influence to its nature shape, with such influences coming, for example, from manufacturing tolerances, temperature changes, or ground motion. The coupling uses three ball-cone constraints, each combined with a released flexural degree of freedom. This arrangement enables a gain of higher load capacity and stiffness, but can also significantly reduce the friction level in proportion to the ball radius divided by the distance between the ball and the hinge axis. The blade flexures reduces somewhat the stiffness of the coupling and provides an ideal location to apply constrained-layer damping which is accomplished by attaching a viscoelastic layer and a constraining layer on opposite sides of each of the blade flexures.

Abstract: An energy dissipation apparatus for installation in structural frames to mitigate seismic effects comprises a scissor-jack system of braces with an energy dissipation device such as a viscous, viscoelastic, or hysteretic damper, or an active or semi-active device, connected between opposing pivot joints of the scissor-scissor jack system. The scissor jack system magnifies displacement so that energy is dissipated more effectively by the damper. Open bay, diagonal, and alternative installation arrangements with respect a structural frame are disclosed.

Abstract: An optical component mounting apparatus for use in an aircraft for maintaining alignment of the optical components during use of the aircraft, the apparatus including an “L” shaped frame and a plurality of “L” shaped mounts, for holding the optical components, in adjustable positions by use of bolts extending through slots, oriented in three orthogonal directions, in the frame and the mounts.

Abstract: A fluid-filled elastic engine mount including an elastic body elastically connecting two mutually spaced-apart first and second mounting members and partially defining a pressure-receiving chamber filled with a non-compressible fluid, a flexible diaphragm partially defining an equilibrium chamber whose volume is variable, a movable oscillating plate partially defining the pressure-receiving chamber, an oscillating device for oscillating the movable oscillating plate for controlling pressure of the fluid in the pressure-receiving chamber, a first and a second orifice passage for effecting fluid communication between the pressure-receiving and equilibrium chambers. The first and second orifice passages are tuned to a low frequency band corresponding to an engine shake vibration and a medium-frequency range corresponding to an engine idling vibration, while the first and second orifice passages are disposed parallel to each other.

Abstract: An anti-vibration holding element 1 for holding pipes 46 and 48 includes a securing part 3, which is connected to a pipe holding part 2. An anti-vibration member 5 is located on an outer circumferential surface of the securing part 3, and between the connected securing part and the pipe holding part 2. The securing part 3 is formed separately from the pipe holding part 2, which is formed with a base 12. An accommodating portion of the base 12, including the outer circumferential surface, receives the securing part 3. When the securing part 3 is located in the base 12 of the pipe holding part 2, the anti-vibration member 5 connects the securing part and the holding part by the fitting of the member on to the base. To facilitate attachment of the holding element 1 to a body 49, the securing part 3 is formed with spaced, opposed claws 27 which engage and attach to a grooved stud 50 welded to the body.

Abstract: Active hydraulic anti-vibration support comprising two armatures joined by an elastomer body partially bounding a working chamber filled with liquid and communicating with a compensating chamber, an exciter member in contact with the working chamber, a control device designed to displace the exciter member and an elastic return device applying a force to the exciter member to return it to its non-operating position in accordance with a certain elasticity curve which has a tangent for a first displacement value corresponding to the non-operating position of the exciter member. The elasticity curve is located below this tangent in the vicinity of a second displacement value corresponding to the end stop position of the exciter member.

Abstract: Energy absorbing members are provided between a lever mount bracket that support a shift lever, and a base member of a vehicle body that is located in the front part of a vehicle compartment. The energy support member includes a pipe, and a trigger that is joined to at least one end portion of the pipe, and the trigger includes a truncated conical portion whose inclined surface causes plastic deformation of the end portion of the pipe in the direction for increasing the diameter of the pipe upon application of an excessive load thereto. The pipe has a three-layer cylindrical core member consisting of an inner continuous glass fiber random mat, a uni-direction continuous glass fiber layer formed on the random mat, and an outer continuous glass fiber random mat formed on the uni-direction glass fiber layer. The layered structure is impregnated with ortho-phthalic acid type unsaturated polyester resin.

Abstract: An improved seat suspension system including, in combination, an air spring and shock absorber, which comprise an air spring member and a shock absorber member, respectively. The air spring member and shock absorber member are longitudinally coupled to provide support and damping along a longitudinal axis. The air spring member and shock absorber member are coupled in a manner that enables them to be readily separated and independently serviced. A seat suspension also comprises a seat moveably coupled to a seat base that has a support structure. The combination air spring and shock absorber is interposed between the seat and the seat base to govern relative motion between the seat and the seat base. The combination air spring and shock absorber is rotationally coupled at each end to allow angular motion between the longitudinal axis of the combination air spring and shock absorber and the centerline of the seat.

Abstract: The present invention provides a vibration isolation system. The Airborne Stabilization/Vibration Isolation System (AS/VIS) is a combination of advanced pneumatic passive suspension, high-capacity voice-coil actuators, integrated sensors, a control processor and a commercial system of software development tools. The entire vertical weight load is borne by the pneumatic mounts. Vertical payload motion is accommodated with little or no friction through the use of air bearings at all sliding surfaces of the mounts. The high-force voice-coil actuators provide a variety of performance enhancements to the passive isolation system. Primarily, they allow control of the payload mean position in the presence of low-frequency quasistatic load variations due to aircraft maneuvering. Horizontal and vertical displacement sensors detect the position of each actuator moving element relative to ground. The controller sends a signal to power amplifiers, which drive the horizontal and vertical voice-coil actuators.

Abstract: A resilient support (10), such as for supporting part of the exhaust system of a motor vehicle, is molded from elastomeric material such as rubber. Upper and lower end blocks (16, 18) have through bores (12, 14) for receiving fixtures connected respectively to the body of the vehicle and to the exhaust system. The blocks (16, 18) are interconnected by three integral diagonally directed arms (22, 24, 26). Vertical vibration of the exhaust system is resisted, absorbed and damped by a combination of tension in the arms (22, 24, 26) and bending at their points of interconnection with the upper and lower blocks (16, 18). The support (10) is thus relatively resilient in this direction. However, sideways movement of the exhaust system, tending to cause movement of the lower block (18) in the direction of the axis of the lower bore (14), is firmly resisted by the arms (22, 24, 26).

Abstract: A compressive/tensile-load-type lead damper absorbs vibration energy by elastic-plastic deformation through bending of lead. The lead damper has a semicircular structural portion at a central portion, and compressive/tensile load input points at opposite ends of the semicircular structural portion. The center of an imaginary circle that overlaps the semicircular structural portion is located on a line connecting the load input points. The lead damper deforms by only a small amount upon receipt of compressive/tensile load and has a compact structure.

Abstract: An apparatus for supporting an electric-component mounter including a substrate supporting device which supports a circuit substrate, an electric-component supplying device which supplies a plurality of electric components to be mounted on the circuit substrate, a mounting device which receives the electric components from the electric-component supplying device and mounts the electric components on the circuit substrate supported by the substrate supporting device, and a base member which supports the substrate supporting device, the electric-component supplying device, and the mounting device, the apparatus including at least one elastic member which is provided between the base member and a surface of a floor which supports the base member, and at least one damper which damps vibration of the base member and the floor surface relative to each other, the vibration resulting from elastic deformation of the elastic member.

Abstract: A disk-drive chassis of the invention has stiffening and damping members for reducing the transmission of vibrations between disk-drive units of a disk-drive array. The stiffening members include vertical dividers that are mechanically coupled between top and middle panels of the chassis. The stiffening members also include a corrugated stiffener attached to a bottom surface of the middle panel. The stiffener's corrugations are aligned parallel with a spindle axis of the respective disk-drive units. The damping member includes a constrained-layer damping plate which is attached to a top surface of the top panel by a visco-elastic damping adhesive. The chassis allows improved performance by the individual disk-drive units.

Abstract: A method and device are provided for influencing an impression which is subjectively perceived by an occupant of a vehicle, in particular of a passenger car, when the vehicle is being operated. The primary oscillations which are produced when the vehicle is being operated are determined. Data for secondary oscillations are acquired from the primary oscillations and are converted at least in part into vibration oscillations which can be perceived through the human body. At least one of the components of the vehicle body is excited using the vibration oscillations, the vibration oscillations being placed in an interference relationship with the primary oscillations. In particular, the steering wheel is also excited so as to undergo mechanical vibration oscillations.

Abstract: A chloroprene rubber composition which contains carbon black and of which the breaking elongation A and the static modulus in shear B of the vulcanizate satisfy the following formula:A.gtoreq.-36.4.times.B+1090 (1)where A is the breaking elongation (%) and B is the static modulus in shear (kgf/cm.sup.2).

Abstract: A vibrating mechanism section comprises an oscillator comprising a vibration coil, a movable iron piece, a stator iron core, a movable shaft, a return spring and so on; a vibration diaphragm driven by the oscillator; and an air pressure generating chamber in which a pulsating air pressure is produced by the vibration diaphragm. The oscillator is provided with a temperature sensor. A vibration isolating mechanism section comprises an insulator; a fluid chamber comprising a main chamber, a sub-chamber, a first orifice and so on; and an amplifying mechanism section comprising a balancing chamber into which the pulsating air pressure is introduced so as to cause the fluid in the main chamber to vibrate, a second diaphragm, a third fluid chamber, a second orifice and so on.

Abstract: A foot structure for an apparatus including a two part bolt member and a slide cup. The bolt member first part is fixed to the apparatus and the second part loosely engages the first part, with an elastic member therebetween. The slide cup has, at an upper portion, a recess for slidably supporting an end of the second part of the bolt member, and a lower portion movable on a floor surface.

Abstract: An electromagnetic levitation device comprises an electromagnet (12) which is supported by a structure (13) and is arranged to attract armature (10) carried by another structure (11). Current to the electromagnet (12) is regulated by a control device (16) to ensure that the electromagnetic force exerted by the electromagnet (12) on the armature (10) is sufficient to cause and maintain levitation of the structures (11, 13) at a desired spacing (A in FIG. 1). A decoupling device (17) is arranged between the armature (10) and the structure (11) to accommodate a shock load (L) which reduces the flux gap (15) to zero and decouples the armature (10) from its support structure (11) by moving the stop (20) away from the structure (11). This significantly increases the extent of shock loading that can be tolerated before damage will be incurred.

Abstract: A vibration isolation system having at least three vibration isolation units. Each of the units preferably has the same general configuration. The isolation units each include a support stand having three (3) adjustable feet for adjustably supporting and leveling the isolation units on the floor of the site of operation of the precision equipment desired to be isolated. The units further include a fluid tight cylinder. The fluid tight cylinder is connected to the support stand via three uniformly spaced rods in such a fashion that allows horizontal movement of the cylinder relative to the support stand. A fluid is disposed in a chamber formed intermediate the fluid tight cylinder and the support stand thereby providing a thin film viscous shear damper for damping excitations having a horizontal component. The fluid tight cylinder is sealed by a diaphragm. A piston is positioned directly above the diaphragm. A pair of stops limit the upward and downward movement of the piston.