Abstract: A turntable for selectively accommodating different types of workpieces in which the system is designed for combining two turntables into one for handling two different workpieces which are rotated by two different motors. Preferably, one of the motors is connected to one of the tables for rotating the table continuously at a slow speed for treating large parts. The turntable is adapted to be selectively arranged for a second motor to drive a second table at incremental positions so as to index smaller parts for treatment. One drive shaft of the two motors is located within the other drive shaft which is hollow.

Abstract: A microwave oven has a tray in its cooking chamber, the tray having an upwardly facing surface for supporting food. A driving mechanism rotates the tray about an upright axis while displacing the tray up and down. The tray may be disposed horizontally or at an angle to horizontal, as it rotates.

Abstract: A movable table has a movable platen, a flange member secured to the movable platen and a fixed platen sandwiched between the movable platen and the flange member. Thrust bearings are disposed between the fixed platen and the movable platen and between the fixed platen and the flange member. Drive units are coupled to the movable platen to move the movable platen along the thrust bearings. Instead of supporting the movable platen on the thrust bearings, it may be supported in a non-contact manner by blowing compressed air into clearances defined between the fixed platen and the movable platen and between the fixed platen and the flange member.

Abstract: A horizontal (X-Y) table used in, for example, a bonding device including a lower table movable in one direction on a horizontal plane, an upper table installed on the lower table and movable in the other direction on the horizontal plane, an upper table driving deck which is supported by a bridge that straddles the upper table and is able to make a linear motion in the moving direction of the upper table on the upper table, a driving mechanism for the lower table, a driving mechanism for the upper table driving deck, and a link which connects the upper table and upper table driving deck so as to move them in the moving direction of the lower table, thus minimizing an area to be occupied by the X-Y table.

Abstract: In a plane motion mechanism, a table is mounted on a top planar surface of a base for movement thereon in plane motion. One end portions of respective first, second and third power transmitting elements adjacent respectively to one ends thereof are wound about an outer peripheral side surface of the table. At least two, first and second, drive units are provided, to which the other ends of the respective first and second power transmitting elements are connected respectively, for applying tension forces respectively to the first and second power transmitting elements. A tension-applying unit, to which the other end of the third power transmitting unit is connected, is provided for applying a tension force to the third power transmitting element. The table may be circular in cross-section and having an outer peripheral side surface.

Abstract: A turntable device for audio and/or video units, floodlights, flower pots, showpieces, etc. In particular, the invention relates to a turntable device preferably having a circular base plate placed upon a base, with a circular bearing race extending on the top side of the base plate near its outer periphery. A concentric bearing ring is placed on the bearing race, for example in the form of a ball bearing ring, with a turntable having a circular bearing race extending on its underside near the outer periphery of the turntable. The turntable is concentric with the base plate to allow the turntable to turn about a common center axis. In accordance with a preferred embodiment of the invention the turntable device is also provided with a second bearing arrangement which is coaxially disposed relative to the center axis and near to the common center axis of the various parts.

Abstract: A base plate positioning mechanism in an electronic part mounting apparatus wherein a part supplying position and a mounting position are fixed, characterized in that a friction driving mechanism is used in a rotative driving unit for setting the rotated positions of an electronic part and a base plate to predetermined angles in order to adjust the part mounting position of the base plate to the fixed mounting position.

Abstract: A solar powered rotary display is assembled on a base having a stationary table mounted on a post fixed to the base, a rotary table mounted for rotation on the base about a main axis defined by the post, and a plurality of display disks mounted for rotation on the rotary table about respective planetary axes carried by the rotary table. A number of drive wheels are mounted on respective axles carried by the rotary table in positions about the main axis for supporting and balancing the rotary table on the base. Each of the drive wheels includes an annular friction surface in contact with both an upper surface of the base and a bottom surface of the display disks for rotating the disks in a fixed ratio with rotation of the rotary table.

Abstract: A rotatable platform having a relatively circular turntable top rotationally supported above a unitary base by a plurality of wheels which make tangential point contact with the underside of the turntable top. The base includes a raised rim portion that carries the rotationally mounted wheels. A step is formed between the raised rim portion and the remainder of the base that helps prevent food particles from contacting a gear train assembly contained within the base. A flat spiral spring is housed beneath the gear train assembly and cooperates with the gear train assembly to rotate the turntable top. A detent is provided on the base that engages an escapement blade for stopping rotation of the turntable top. The base is substantially square with rounded corners.

Abstract: The wafer positioning apparatus has an X.multidot.Y axis drive mechanism for moving a mounting stock in the X-axis direction and the Y-axis direction in the X.multidot.Y coordinates on the horizontal plane; a wafer inserting section is fixed on the mounting stock and has a space for inserting a wafer horizontally; photosensors are installed at the wafer inserting section and arranged at regular intervals on positions corresponding to peripheral portions of the wafer so as to detect edge portions of the inserted wafer; and a rotary section is arranged at the center of the wafer inserting section to be attached to the center of the rear surface of the inserted wafer by suction. The wafer is held on a hand plate or the like of a separate carrier system and inserted horizontally into the center of the space within the wafer inserting section, and the photosensors act in this state and detect peripheral portions of the wafer, and at the same time the X.multidot.

Abstract: An improved apparatus for heating and cooking foods includes an oven frame having an interior formed as an oven chamber, a turntable turnably supported on the bottom of the oven chamber, a plurality of rollers rotatably disposed between the turn dish and the outer peripheral region of a bottom plate, and a mechanism which projects downward from the bottom of the turntable which prevents the turntable from sliding on a table surface. The rollers are rotatably received in an annular groove located around the outer peripheral region of the turntable. The mechanism for preventing sliding of the turntable is that of an annular trough having a V-shaped sectional shape. The lowermost part of the annular trough is located lower than the rolling surface for the rollers. In a second embodiment the mechanism for preventing sliding of the turntable is a plurality of downward projections formed around a single circle in an equally spaced relationship.

Abstract: Apparatus including a housing defining an interior, a cutting board movable between a first position within the interior and a second position projecting outwardly from the housing, and transport means for selectively moving the cutting board between the first and second positions.

Abstract: A mechanism for moving a table structure having a table as a part thereof in the lengthwise and crosswise direction and turning movement of the table, the mechanism having a support base, support bearing structure on the support base for supporting the table structure for movement in the lengthwise and crosswise direction and turning movement of the table, two mutually orthogonal pairs of parallel guide faces adapted to be mounted on the table structure, guide members on opposite sides of the table structure and engaged with the guide faces for controlling the movement of the table structure in the lengthwise and crosswise direction and turning movement of the table, and a moving device connected to at least some of the guide members for moving appropriate ones of the guide members for causing movement of the table structure along the other of the guide members in the lengthwise and crosswise direction of the table and in turning movement of the table.

Abstract: A multi-sided carousel storage device is rotatably mounted and has a plurality of storage cavities for receiving objects. Part of the rotatable mechanism comprises a stationary member having an upright member connected thereto, the upright member being fixedly connected to a platform member arranged in an opening of an upper surface of the carousel unit. The upper surface of the carousel unit includes a ring-like member having a bearing surface thereon. Rotatable members are mounted on the fixed platform and have bearing surfaces which bear against the bearing surface of the ring-like member, so that when the carousel member is rotated, the rotatable members rotate to frictional engagement with the bearing surface of the ring-like member. Decorative objects are preferably removably mounted on the rotatable members to rotate with rotation of the carousel device. Specific storage and shelf configurations are also disclosed.

Abstract: A moving display rack includes a plurality of generally bow shaped link rods used to secure a plurality of bearing boards, which are disposed at different level positions, to a base by means of fastening plates and bushings. During display, the motor which is set in the base drives the link rods to carry the bearing boards to rotate horizontally, so as to attract visitors' attention.

Abstract: The device comprises a base element (1) and a movable element (8). Three control arms (4) are rigidly mounted at their first extremity (15) on three shafts (2) which may be rotated. The three assemblies each formed by a shaft (2) and an arm (4) are the movable parts of three actuators (13) of which the fixed parts (3) are integral with the base element. The other extremity (16) of each control arm is made integral with the movable element through two linking bars (5a, 5b) hingedly mounted on the one hand to the second extremity (16) of the control arm and, on the other hand, to the movable element. The inclination and the orientation in space of the movable element remain unchanged, whatever the motions of the three control arms may be. The movable element supports a working element (9) of which the rotation is controlled by a fixed motor (11) situated on the base element. A telescopic arm (14) connects the motor to the working element.

Abstract: An apparatus for even exposure of potted plants to sunlight includes a base, a potted plant receiving platter rotatably mounted to said base with the platter having an upstanding peripheral flange bounding an interior portion of the platter. A shroud is mounted to the base and defines a cowl which overlies the platter's peripherlal flange to confine dirt and water to the interior portion of the platter. The platter has peripheral gear teeth and an electric motor and drive assembly is coupled to the platter for rotation thereof at predetermined timed intervals. An optional wheeled carriage can be mounted to the base with the carriage wheels rotatably coupled for movement of a plant across a support surface. A set of slave units including rotatable platters can be interconnected together and to a powered master unit for simultaneous rotation of many plants.

Abstract: Herein disclosed is a powered rotating seat which comprises a seat proper; a lower base member adapted to be mounted on a floor, the lower base member including a structure by which an annular groove is defined; an upper base member mounting thereon the seat proper, the upper base member having a circular opening defined by an annular flange portion thereof, the upper base member being put on the lower base member having the annular flange portion slidably received in the annular groove; and an electric drive unit for rotating the upper base member relative to the lower base member upon energization thereof, the drive unit being installed in an inner space which is defined by the lower and upper base members.

Abstract: A spring-powered turntable for use in a microwave oven includes microwave energy responsive assembly for automatically permitting rotation of the turntable when microwave energy exposure begins and for automatically turning off rotation of the turntable when microwave energy exposure ceases. The microwave energy responsive assembly can be located between a rotating part of the turntable and a non-rotating part of the turntable. The microwave energy assembly can include a material that expands or contracts when exposed to microwave energy and serves to control a brake for braking the rotating part of the turntable.

Abstract: Disclosed is an electric apparatus comprising a housing with a door, a turntable arranged in the housing for rotating an object, a synchronous motor for driving the turntable, and a control portion for controllling the driving of the synchronous motor, the control portion having apparatus for storing the time required for the turntable to rotate once, apparatus for determining whether or not a time period which is approximately a natural number multiple of the time required for the turntable to rotate once, has elapsed since initiation of turntable rotation, and apparatus for stopping an operation for the rotation of the turntable on the basis of the determination that time, which is approximately a natural number multiple of the time required for one rotation of the turntable, has elapsed.

Abstract: This invention relates to a type of multi-function automatic revolving Christmas tree base. Its rotation directions can be changed automatically by means of a DC motor transmission to drive the revolving cylinder of the Christmas tree, which drives a two-way exchanging mechanism to change the polarities of the input current from the DC motor, so that the DC motor can rotate in positive and reverse directions. On the outer walls of the revolving cylinder are two conductive copper collars in connection with outer power source. Part of the two conductive copper collars is extending upwards through the wall of the revolving cylinder and in connection with another socket, which can serve as the power source of the lamps on the Christmas tree. Therefore, when Christmas tree is turning in one direction, there is no worry of the winding and knotting of the power cords.

Abstract: Portable turntable for rotating food in a microwave oven, including a self-contained motor which drives a rotatable platform upon which the food is mounted. The turntable is made of a material having a low loss tangent at microwave frequencies, and the drive motor is surrounded by a shielding enclosure which reflects microwaves.

Abstract: A microwave oven turntable having a load-responsive mechanism for self-activating the turntable upon the placement of foodstuff thereon. The turntable includes a base assembly having a planar bottom and upwardly extending sides to form a base interior in which a drive shaft is rotatably driven by a coil spring. A tabletop is coupled to the drive shaft for rotation therewith, but the rate of rotation is determined by the cyclical motion of a governor. The load-responsive mechanism includes a resilient brake member which is aligned in a governor-locking position. The tabletop is linked to the brake member by an actuator and the brake member is sufficient rigid to maintain the actuator and tabletop in a slightly uplifted condition when in the governor-locking position. The placement of foodstuff on the tabletop, however, provides a gravitational force which displaces the brake member into a governor-releasing position in spaced apart relation to the governor.

Abstract: A work station for ergonometrically supporting a human operator in a seated position while the human operates equipment located on the work station. A chair (12) has a first portion (12b) contactable by a thigh of the seated operator and a second portion (12c) contactable by the operator's back. The chair (12) is rockable about a horizontal axis of a main pivot shaft (28). A carriage (14) is secured proximate the front edge of the first portion (12b) of the chair (12). A surface for supporting an input device (16) and a surface for supporting a visual display device (18) are attached to the carriage (14). As the seated operator rocks about the horizontal axis of the shaft (28), the spatial distance between the surface for supporting an input device (16) and the seated operator remain essentially constant, as does the spatial distance between the surface for supporting the visual display (18) and the seated operator.

Abstract: An x-ray diagnostics installation has an adjustable patient support table, with a control box for positioning the table, the control box also being adjustable relative to the table. The control box is attached to a bracket which is mounted in the region of the foot end of the patient support table, and is displaceable via the bracket in a direction parallel to a longitudinal edge of the table.

Abstract: A portable microwave oven turntable having a base assembly defining a base interior. The base assembly includes a planar bottom and upwardly extending sides supporting a circular base cover member. Within the base interior is a spring motor which may be wound to rotate a drive shaft about a vertical axis. An upper portion of the drive shaft projects from the base interior through the base cover member. Atop the base cover member a drive gear is fixed to the upper portion of the drive shaft. The drive gear has a plurality of radially extending arms having coplanar upper surfaces and opposed lateral edges. A circular tabletop is rested upon the radial arms of the drive gear and tabletop teeth or projections engage the lateral edges of the radial arms. The tabletop projections extend downwardly from the lower surface of the tabletop and project radially inwardly from an annular hub. Rotation of the tabletop is translated directly from the drive shaft via the radial arms.

Abstract: A micropositioning device having a plurality of degrees of freedom is provided. This device is particularly useful in guiding optic components. The device has N degrees of freedom and comprises two rigid members, namely a reference base and a movable platform. The reference base and the movable platform are connected by N independent chains. Each chain consists of N elastic guide means with a single degree of freedom, arranged in series, and an actuator fixed to the reference base.

Abstract: Portable turntable and drive motor assembly for use in microwave ovens. The drive motor assembly is positioned to one side of the turntable platform and has a low profile so that it will not interfere with the rotation of overhanging objects on the platform. In the principal embodiment disclosed, the drive motor is spring powered.

Abstract: Turntable for rotating food being cooked in a microwave oven, including a rotatable platform upon which the food is mounted and a drive motor positioned to the side of the platform. The turntable is made of a material having a low loss tangent at microwave frequencies, and the drive motor is surrounded by a shielding enclosure which reflects microwaves. In one of the disclosed embodiments, the turntable can also be used in conventional ovens.

Abstract: A device for rotating food while cooked in a microwave oven includes a metal housing supported above the oven floor by dielectric feet, and a turntable mounted above the housing. The turntable is rotatable by virtue of a turntable shaft having downwardly extended legs forming a non-circular cross-section, insertable into a similarly configured bore within a drive shaft inside the housing. A detent, pivotally mounted beneath the housing, can be pivoted manually to a locking position in which an arm of the detent engages one of several notches formed in the turntable, to prevent further turntable rotation relative to the housing. A bearing assembly between the top of the housing and the turntable includes an annular frame, and a plurality of ball bearing-containing receptacles arranged symmetrically about the frame.

Abstract: A turntable drive unit of a microwave oven which comprises a spring box disposed below floor of the cooking chamber in the microwave oven, the spring box containing a shape memory alloy plate spring disposed therein, an axle mounted to the spring box through one end thereof and the other end thereof mounted to a food platform, and a shape memory alloy coil spring disposed in the spring box, one end of the coil spring connected to an air control plate disposed in the spring box whereby the food plateform can be automatically rotated by varying the temperature in the cooking chamber in the microwave oven and varying the temperature in the spring box.

Abstract: A transfer arm mechanism including a base assembly, a pivoting arm extending generally upwardly from the base assembly, a wafer support paddle, and mechanisms for pivoting the arm back and forth while maintaining the wafer support paddle in a horizontal plane. A base assembly includes a rotatable plate which can rotate the mechanism through 360.degree., and a support plate which can be moved up and down along guide posts attached to the rotatable plate. The mechanism for moving the wafer paddle along a horizontal plane includes a cam member attached to the support plate, and a cam follower which rolls along an upper surface of the cam member to compensate for the pivoting action of the arm assembly. A mechanism is also provided to prevent the wafer paddle from tipping which includes a drive chain extending between a gear which is rotationally fixed with respect to the support plate and a gear which is attached to a pivot pin supporting the wafer paddle.

Abstract: A turntable for use in a microwave oven which comprises a first rotatable axle secured to the plate of the turntable and disposed within an annular holder, the first rotatable axle including a cavity disposed along its center, an actuating gear having a shaft extended therefrom for being actuated to engage the cavity of the rotatable axle, the actuating gear including an aperture disposed along its center for receiving a second axle supported on a lower plate of a housing member and an annular cam disposed at the underside thereof, the annular cam having an inclined surface disposed along its periphery, a supporting roller secured to the lower plate of the housing member for slidably contact with the declined surface of the annular cam for moving the actuating gear upwardly and downwardly, and a main driving gear actuated by a motor, the main driving gear geared with the actuating gears for rotating horizontally and simultaneously vertically so that the turntable rotates and moves vertically.

Abstract: A switchboard desk is equipped with a height-adjustable desk-top and at least two telescopic legs. The desk comprises devices which effect the raising and lowering of the top, and control devices. The height-adjustable devices comprise at least two hydraulic cylinders each positioned in a telescopic leg and connected to a hydraulic pump, which in turn is driven by an electric motor. The controlling devices comprise manually actuated devices which switch on the electric motor to rotate in either direction according to the way they are actuated. A potentiometer monitors the rotation of the electric motor and controls a digital voltmeter for providing the indication of the position of the desk-top above a reference level.

Abstract: A microwave oven turntable having a removable table top driver at various points about its circumference. The turntable includes a base having a flat bottom and an upwardly extending cylindrical side wall. A central drive shaft is rotatably mounted to the base bottom to form a vertical axis of rotation. A spring provides rotational energy to the drive shaft. A dependent gear is coaxially mounted to the drive shaft and the dependent gear meshes with a gear train that governs the rate of drive shaft rotation so as to ensure a relatively constant rotational speed. The spring and gears are encased by a circular base cover member having a center aperture through which a portion of the drive shaft projects. A spider drive member is attached to the portion of the drive shaft projecting through the base cover member for rotation therewith. The spider drive member rests on a retainer ring having spherical balls and is additionally supported by freely rotatable wheels.

Abstract: A multi-step control apparatus is provided for raising and lowering a patient treatment table in response to predetermined successive motions of the foot of an operator. An operating rod mounted transversely of the table has a foot pedal on each end thereof and is biased to a mid position both longitudinally and rotationally. In response to inward pressure on either foot pedal a timing cycle is initiated during which the doctor may then initiate a raising or lowering cycle for the table by stepping on one side or the other of the foot pedal and rotating the operating rod out of a neutral rotational position. However, a raising or lowering cycle cannot be initiated without first moving the operating rod inwardly to initiate the timing cycle so that accidental or inadvertent raising or lowering of the table by simply rotating the foot pedal is prevented.

Abstract: A rotary table unit having a stationary base element and a table element rotatably mounted on the stationary base element is provided with hydrostatic and hydrodynamic bearing guides forming a composite bearing guide mechanism for enabling smooth and stable rotation of the table element under application of local load to the table element. The rotary table unit is also provided with a main drive motor for rotating the table element and an auxiliary drive motor for supplementing a drive force of the main drive motor in response to a change in load applied to the table element.

Abstract: A direct-acting table mechanism in which tables are driven without any contact by use of a hydrostatic fluid for thrust-transmitting the tables in their sliding direction. The tables are hydrostatically supported on hydrostatic guides on a bed, and differential pressures are supplied to the hydrostatically supporting portions to control the attitude of the tables. This table mechanism is of high degree of accuracy uninfluenced by errors in the feed screw system, high rigidity and thus permits highly stable fine feed.

Abstract: Portable turntable and drive motor assembly for use in microwave ovens. The drive motor assembly is positioned to one side of the turntable platform and has a low profile so that it will not interfere with the rotation of overhanging objects on the platform. In the principal embodiment disclosed, the drive motor is spring powered.

Abstract: A turntable for microwave oven is disclosed, comprising a base (4), having a platform (2) rotatively mounted thereto. A motor assembly (6) is mounted to an underside of the platform (2) and engages with a gear ring (28) in the base (4), whereby turning the platform (2). The motor assembly (6) has a metallic casing (126, 128) and serves as a secondary mode stirrer. A speed reduction assembly (8) is further provided, mounted to the underside of the platform (2).

Abstract: A switch assembly for microwave oven turntable is disclosed. The turntable comprises a base (4) and a platform (6) rotatably mounted thereupon. The platform (6) is adapted having a downward pripheral rim flange (36), along which an annular gear ring (38) is provided. A flange (20) extends outward from the base beyond and below the rim flange (20). A switch mechanism includes a rocker body (48) pivotally mounted to the flange (20) and adapted to pivot toward and away from the flange (36). A locking finger (60) extends under the rim flange (36) and upward into a parallel and adjacent relationship with the gear ring (38). The locking finger (60) is of triangular saw-toothed cross section defining an apex ridge (62) oriented toward the gear ring. The gear teeth of the gear ring (38) likewise have a saw-tooth configuration. Rocking actuation of the switch body causes the locking finger (60) to pivot toward and away from meshing engagement with the gear ring (38).

Abstract: Locking mechanism for a mechanically driven, low profile, portable turntable for use in cooking ovens, especially microwave ovens, for rotating foodstuffs while cooking. The low profile turntable includes a spring which varies the height of the rotating portion of the turntable with respect to the base between a first predetermined position when there is no food or the like on the turntable and a second predetermined position when there is food on the turntable. The locking mechanism includes notches and prongs located on the rotating portion and base portion of the turntable which engage each other when the turntable is in the first predetermined position to prevent rotation of the turntable.

Abstract: A mechanism for adjusting the height of a work surface (12) includes left- and right-side cable lift mechanisms (16, 18) coupled to a central drive mechanism (20) through cables (96). Each cable lift mechanism (16, 18) includes a hanger clip (22) engaging wall panel slots (15), a mounting plate (38) removably suspended from the hanger clip (22) and a vertically movable extrusion (74) guided along the plate (38) and having pulleys (88) engaging one of the cables (96) to support the work surface (12). Antidislodgment latches (50, 60) prevent accidental dislodgment of the mounting plate (38) and clip (22). One embodiment of the central drive mechanism (20) includes a motor-driven screw (134) and a forward slide block (114) positioned within an elongated channel (110) and mounting a slidable yoke (122) securing ends of the cables (96). The slide block (114) bears against a nut (146) captured within the channel (110) and threadably received on the screw (134).

Abstract: A positioning mechanism comprising three pantagraphs supporting a table on a base. Each pantagraph is constructed of four links connected into the form of a quadrilateral. The table is positioned to permit with six degrees of freedom by regulating the angle of inclination of each of the six lower links of the pantagraphs with respect to the base.

Abstract: Table couplings for coupling hydraulic actuators to large shaking tables, such as earthquake simulator tables are preloaded under gaseous pressure to permit the couplings to be nontension carrying couplings, which in turn permits use of hydrostatic slip bearings between the side surfaces and the bottom surface of the table and the actuators. The hydrostatic bearings in turn reduce the need for swivels, links and yokes that carry both tension and compression. The use of compression only loading such as that permitted with the present device, also reduces the problem of making a satisfactory table foundation, because only compression loads are carried to the foundation rather than alternating tension-compression loads.

Abstract: A revolving motor-driven turntable for a saucepan which automatically moves and mixes liquid food being cooked over a gas burner. The motion imparted to the food by the revolution of the saucepan eliminates the need of stirring.

Abstract: Compact turntable for use in microwave ovens. The drive motor assembly is positioned entirely beneath the rotating platform having a ring of inwardly facing gear teeth and has a relatively low profile. This turntable can be utilized in smaller oven cavities than bulkier turntables heretofore provided.

Abstract: A radiotransparent table for supporting a patient in an X-radiography zone slides in linear bearings on a standard. The table is motor driven through a cable or like linkage anchored at the head and foot of the table and passing over the motor drive roll and an idler roll located on the stand between the drive roll and zone so that substantially the full length of the table can be moved to the radiography zone. The head and foot anchors are unobstructed in movement toward the drive roll. Preferably there are two symmetrical sets of rolls, anchors and linkages at opposite sides of the table applying neutralizing torques to the table.

Abstract: A rotary board for serving dishes on, comprises a generally annular base member (2), and a circular board (B) driven by a motor (8) installed in the base member (2).Ball bearing units (5, 5') are mounted between the board (B) and the base (2), which comprise a pair of coaxial ball bearing units (5, 5') the inner rings (4, 4') of which are fastened together and driven by the motor (8). The lower one (3') of the outer rings of the ball bearing units is fastened to the base member (2), while on the upper outer ring (3) rests the board (B), whereby the upper outer ring (3) and the board (B) thereon are permitted not only to rotate following the inner rings (4, 4'), but also to stay checked by hand while the inner rings are driven by the motor.

Abstract: A table for use in a hot cell or similar controlled environment for use in examining specimens. The table has a movable table top that can be moved relative to a table frame. A shaft is fixedly mounted to the frame for axial rotation. A shaft traveler having a plurality of tilted rollers biased against the shaft is connected to the table top such that rotation of the shaft causes the shaft traveler to roll along the shaft. An electromagnetic drive is connected to the shaft and the frame for controllably rotating the shaft.