Abstract: Continuous joint for seat permitting compensation of clearances consisting of a fixed plate integral with the seat part and a moving plate integral with the back, this assembly capable of having an angular movement of one of the parts in relation to the other in which:(a) An elastic bearing (19) is inserted between the eccentric constituting a cam (13, 22) and the part which it drives (4, 21).(b) The central rotational shaft of the eccentric constituting a cam (13) has a flat part giving two opposite bearing points (17, 18) essentially at 120.degree. in relation to each other on the interior zone of the hole (16) of the moving plate (2) in order to compensate for the tolerance clearances inherent in the manufacture of the continuous joint.

Abstract: An antibacklash beveled gear drive is disclosed. The drive is constructed adjust for intial misalignment and subsequent wear. One of the gears is journaled on a driven shaft and has a biasing means which bump the gears into engagement.

Abstract: There is disclosed a gear system wherein a gear (5) is mounted on a conical main shaft (8) in such a manner to move axially thereon, the gear being in meshing engagement with a gear (3) and a receiving device is provided to receive thrust generated at the gear (5). When a plurality of gears (5) are employed, a clearance (S) formed between the surface of the conical shaft (8) and the inner peripheral surface of a bearing (17) of each gear (5) is changed according to axial position of the gear (5) on the conical shaft (8) under the influence of thrust counterbalance device. Thus, a distance between the center axis of the conical shaft (8) and that of the ger (5) is thereby increased or decreased so as to effect even application of load to each gear (5).

Abstract: The backlash-free reducing mechanism, includes a fixed flange insidely provided with a toothed ring with which meshes a first toothing of a double planet wheel, a mobile flange having an inner toothed ring intended for cooperating with a second toothing of the double planet wheels. The mobile flange is maintained free in rotation in the fixed flange by a circular member. The double planet wheels are maintained in the reducing mechanism by a central planet wheel holding piece having resilient means and are centered on a side of the toothed ring of one of the flanges by a resilient floating idle pinion.

Abstract: An anti-lash gear mechanism is provided to reduce the noise in a gearing system. The anti-lash mechanism has a gear member disposed for rotation axially adjacent one of the power transmitting gears in a gearing system. The anti-lash gear has one more tooth on the periphery than the power transmitting gear and the anti-lash gear is disposed in frictional engagement with the power transmitting gear. When another power transmitting gear meshes with this combination of gears, the anti-lash gear remains in mesh with the drive gear until the next successive gear tooth on the driven gear is engaged. The frictional contact prevents the drive gear from accelerating to engage the drive gear from the driven side. This gear mesh causes the anti-lash gear to rotate relative to the power transmitting gear until complete meshing of the two power transmitting gears is attained.

Abstract: A manipulator drive mechanism employing splined shafts in both a vertical and a horizontal axes. The horizontal splined shaft is rotatably driven by a rack assembly and a pinion gear rotatably fixed with respect to the horizontal splined shaft and which is also slidable along the horizontal splined shaft.

Abstract: A fluid-powered helical actuator including a cylindrical body; a rotatable output member supported for rotation relative to the body and connectable to an external device; first and second independently rotatable sleeves reciprocally mounted within the body; a piston reciprocally mounted within the body for application of fluid pressure to one or the other opposing sides thereof to produce axial movement, the piston operatively engages at least one or the other of the sleeves to axially move the sleeves in response to axial movement of the piston; and torque-transmitting elements for transmitting torque between the first sleeve and the body, between the first sleeve and the output member, between the second sleeve and the output member, and between the second sleeve and the body.

Abstract: An improved support ring (50) is disclosed for supporting a plurality of planetary gear sets (20) which are driven by a centrally disposed input shaft (12) having a sun gear (16) attached thereto in which the planetary gear sets are subject to radially inward loads. The support ring (50) includes an inner ring (52) and an outer ring (57). The inner ring (52) has a bore (54) which is disposed around the input shaft (12) and an outside surface (56) and the outer ring (57) has a bore (58) with a diameter greater than the diameter of the outside surface of the inner ring. The outside surface (60) of the outer ring rotatably supports the planetary gear sets (20). Preferably, the outer ring (57) has a spring rate which is less than the inner ring (52) to readily permit absorption of radial loads when the outer ring does not contact the inner ring. A retaining ring (62) may be provided to maintain a fixed axial relationship between the inner (52) and outer rings (57).

Abstract: A work piece positioning device which has a table upon which the work piece is supported is disclosed. The table is rotatably mounted on a sub-assembly which is tiltably mounted on a frame such that the work piece can be positioned in any desired predetermined attitude. Two worm gear systems are utilized for positioning the table, one for the rotating action and one for the tilting action. Each worm gear system has a worm gear, a tiltable worm and a locking mechanism. Once the table and work piece are in the desired predetermined attitude, the locking mechanisms are actuated, locking each worm to its respective worm gear.

Abstract: An improved system for the automatic recovery of play between a worm and a worm gear, particularly in welding robots, the system being formed by at least one resilient member of the cup spring type or the like, acting perpendicularly to the axis of rotation of the worm.

Abstract: There is provided a backlash control rotation gear assembly for robotic applications, with such assembly comprising an input device to provide rotational force of a predetermined maximum torque. The system further includes a first drive gear which is connected to the rotational input device and a second drive gear which is connected to the first drive gear by an elastic torsion spring preloaded with a predetermined spring torque force. An output driven gear is connected to a moveable robotic part to be rotated, with such driven gear being connected to the first and second drive gears, wherein the first drive gear is driven by the rotational input device and the second drive gear is driven indirectly by the input device through the preloaded elastic torsion spring.

Abstract: A linear actuator includes a single drive gear that engages two driven gears of the same pitch diameter, which in turn drive a spindle and a sleeve, respectively. The sleeve is internally threaded to receive the spindle, which is externally threaded. The sleeve and spindle are driven rotationally at slightly different rates due to different numbers of teeth on the two driven gears, producing linear motion of the spindle relative to the sleeve. The drive gear can be rotated in increments corresponding to integral numbers of teeth and the rest positions of the gears can be full engagement positions to minimize play in the gears.

Abstract: A method for adjusting the backlash between the pinion gears and the bevel gears of a bevel-type differential is to mount the elements in the corresponding differential housing half, hold the pinion gears against the half and press the bevel gear towards the bevel pinion gears. The travel distance of the bevel gear is measured, and a shim is provided between the bevel gear and the housing having a thickness approximately equal to the difference between the measured displacement and the previously calculated desired displacement. An apparatus for practicing the method has a clamp for holding the pinion gears to the housing, locating means for precisely positioning the housing and bevel gear relative to one another, an air cylinder to press the bevel gears towards the pinion gear, and a micrometer used to measure the travel distance of the bevel gear.

Abstract: A mechanism arranged in combination with a multiple ratio transmission for eliminating gear rattle in the various gear ratios and neutral position of the transmission. Such mechanism includes a gear network that is preloaded with a spring arrangement which imparts a spring torque to each gear mesh in the transmission. The spring torque provided by the spring arrangement has a magnitude greater than the inertia torque of the gear meshes arranged in the transmission and is capable of overcoming torsional acceleration imparted to those gear meshes.

Abstract: The invention is an anti-backlash gear assembly comprising a first gear rotatably mounted to a shaft incorporating a first slot partially therethrough which is aligned with the longitudinal axis of the shaft. A second gear is rotatably mounted to the shaft and has a second slot extending completely therethrough which is alignable with the first slot. First and second wedge members having contiguous bevelled side surfaces are mounted in the aligned first and second slots. The first wedge member is rigidly attached to the first gear, and the second wedge member is moveably attached thereto. The second wedge member is attached to the first gear by means of a fastener extending through an oversized hole therein and threadably engaging a second threaded hole in the back wall of the first slot. A Belleville spring washer is mounted between the second wedge member and a side wall of the second slot of the second gear.

Abstract: The bending and turning movements of the wrist are brought about by drive motors via at least one gear train, in which a cylindrical gear pinion drives a cylindrical gear wheel via an intermediate wheel. For adjusting the backlash, the intermediate wheel is journalled on a movable support which makes contact with a cylindrical guide surface in the wrist housing and can be displaced, by means of two adjusting screws, along a circular path, the center of which coincides with the axis of rotation of the gear pinion. The intermediate wheel is journalled on an eccentric bearing pin on the movable support.

Abstract: A transmission for controlled equipment consists of a pair of intermediate gears in mesh with an input gear, another pair of intermediate gears in mesh with an output shaft and a pair of intermediate shafts, each connecting one of the intermediate gears engaged with the input gear and one of the intermediate gears engaged with the output gear, thus forming a pair of gear trains, wherein one of the intermediate gears is loosely mounted on one of the intermediate shafts and is also made fixable by a fixing means, the intermediate shaft and the intermediate gear in the loosely coupled condition are slightly turned in opposite directions so that the gear train made up of the input gear, the intermediate gears on one side and the output gear and the other gear train made up of the input gear, the intermediate gears on the other side and the output gear have no backlash between the gear teeth surfaces of the input gear and the intermediate gears with respect to the power driving directions which are opposite for th

Abstract: In a gantry arrangement or mechanical guidance assembly for an industrial robot, a carriage supporting the robot is mounted on an elongate guide element of circular cross-section extending parallel to the robot travel path. Rotation of the robot carriage about the circular guide element is prevented by the bracing of the carriage against an elongate guide element having a rectangular cross section, the bracing being effectuated by at least two rollers rotatably mounted to the carriage and rollably engaging the rectangular guide element.

Abstract: A Belleville spring is interposed between adjacent end faces of a retainer and an adjuster for preventing a rattling sound of a steering gear. At least one of the end faces is conical in such a way as to taper in the same direction as the Belleville spring. The taper angle of the conical end face is smaller than that of the Belleville spring in a state free from any load. In one embodiment, a wave spring is used in place of the Belleville spring. In this case, at least one of the end faces is formed into a wave shape having a wave height smaller than that of the wave spring in a state free from any load.

Abstract: A power steering system uses an electric motor to produce an auxiliary torque which is added to the torque applied to the steering wheel of a vehicle by the driver. The system includes a couple mechanism for coupling the motor to the steering shaft. The system further includes a converting mechanism for converting a part of rotating force in the motor in an axial force and installed in the coupling mechanism and an elastic member for absorbing the axial force and installed in the coupling mechanism. This permits the elastic member to absorb the momentary shock occurred at starting condition of motor due to backlash of gears in the coupling mechanism.

Abstract: An antibacklash gear system wherein a pair of gears mounted for limited movement therebetween are biased by a spring to move the teeth of the gears out of register, the spring serving as a link between two levers mounted on one of the gears. The position of one of the levers may be adjusted to vary the force applied to the other lever by the spring to thereby vary the force urging the gears to move relative to each other.

Abstract: A steering gear mechanism includes a housing and a worm gear having an input portion. The worm gear is supported for rotation in the housing. A sector gear has teeth in meshing engagement with teeth formed on the worm gear. The sector gear has an output portion. A circumferentially expandable spring pin supports the sector gear for pivotal movement relative to the housing and biases the sector gear into meshing engagement with the worm gear to compensate for wear of the gears. The housing has means for supporting the spring pin.

Abstract: A gear system has a planetary gear (5) mounted on a conical main shaft (8) in such a manner to move axially thereon, the planetary gear being in meshing engagement with a central gear (3). A receiving device is provided to receive thrust generated at the planetary gear (5). When a plurality of planetary gears (5) are employed, a clearance (S) formed between the surface of the conical main shaft (8) and an inner peripheral surface of a bearing (17) of each planetary gear (5) is changed according to the axial position of each gear (5) on the conical shaft (8) under the influence of a thrust counterbalancing device. Thus, a distance between the center axis of the conical shaft (8) and that of the planetary gear (5) is thereby increased or decreased to effect even application of load to each planetary gear (5).

Abstract: Backlash preventing apparatus for a transmission for a vehicle having an outer race fixed to a body, an inner face fixed to a driving shaft, and a bail bearing disposed therebetween. A roller clutch is provided having a plurality of inclined grooves mounted between the outer race and the inner race. A backlash preventing roller is located in the inclined grooves. A first support spring and a support pin are inserted within an inclined spring hole formed adjacent to a corner of the inclined groove. A small roller is inserted into a gap formed between the roller clutch and the inner race, and a second support spring and pin are mounted between the roller clutch and inner race. The backlash preventing apparatus enables the inner race to rotate in a first direction and provides limited backlash rotation in a reverse direction.

Abstract: Herein disclosed is a controlling transmission to be used with an industrial robot or the like, which is constructed of a planetary or star gear mechanism having at least one pair of intermediate gears arranged between a sun gear and an internal gear. The paired intermediate gears are set by the movement adjustment of a movement adjusting mechanism such that one of them has its back-lash eliminated with respect to the rotations in the clockwise direction whereas the other has its back-lash eliminated with respect to the rotations in the counter-clockwise direction.

Abstract: Device comprising a screw (6) and a nut (8) subjected to an axial force which alternates in opposite directions, the thread (7) of the screw having a given helix angle and a given pressure angle which are so chosen that, in a first direction, termed reversible direction, the screw (6) is capable, under the axial thrust exerted in this direction by a spring (20), of effecting a translation and a rotation in the nut (8), and that, in a second direction, termed irreversible direction, opposed to the first direction, the screw undergoing an axial thrust in this second direction by a push-member (9), can effect neither a translation nor a rotation in the nut. This assembly may be applied to the automatic taking up of play of systems subjected to alternating longitudinal forces, such as shafts of electric motors or cable controls.

Abstract: The invention is an anti-backlash gear assembly. The gear assembly comprises first and second gears mounted on a common shaft and rotatable with respect to one another about the axis of rotation. The first gear has a slot. A fastener having a threaded end extends from the far side of the second gear into the slot. A cam member located within the slot incorporates a cam surface thereon and is threaded to the fastener. Thus, rotation of the cam member varies the distance of the cam surface to the walls of the slot. A cam follower is included having first and second ends with the first end in slideable contact with the cam surface. A Belleville spring washer is mounted between the second end of the cam follower and a side wall. Thus, the gear assembly can be easily engaged with a mating gear such as a rack gear, because the teeth of the first and second gears need not be biased apart.

Abstract: A gear assembly comprising two gears and a spring in the form of a C-shaped clip for applying a resilient force between the gears. Two pins are provided on the respective side surfaces of the gears to receive the spring which has concave end surfaces to be received by the pins. Each of the concave end surfaces is defined by a part of a circle having a center which lies on a line of action of force by the pins.

Abstract: A cylindrical gear unit which includes a gear housing, a gear pinion and a gear wheel, the gear pinion being fixed to a shaft which is rotatably journalled in bearings supported by at least one bearing support. One of the bearing supports comprises a sleeve in which a roller bearing is fixedly mounted, a fixing plate supported by the gear housing, as well as a disc-shaped rib portion which interconnects the sleeve and the fixing plate. The rib portion extends substantially along the entire length of the sleeve and the fixing plate and is substantially parallel to a tangential plane on the contact line between the gear pinion and the gear wheel. In addition, at least one stop face for the sleeve is arranged at a small distance from the outside of the sleeve on at least that side of the sleeve facing away from the gear wheel.

Abstract: In a bevel gear device, wherein bevel gears are provided which are fixed to forward ends of shafts crossing each other, respectively, and in mesh with each other, and a turning force applied to one of the shafts is imparted to the other, at least either one of the shafts is made movable in the axial direction thereof, and a pre-load is applied to the movable shaft in the advancing direction, in which the bevel gears are in mesh with each other, by use of a first force. As a consequence, fluctuations of the backlash are reliably absorbed, necessity of the backlash adjustment is eliminated, and an excessively high pre-load can be prevented from being generated. Furthermore, another pre-load is applied to the movable shaft in the direction reverse to the first force, by use of a second force weaker than the first force. As a consequence, a tooth surface force applied to the bevel gears can be reduced.

Abstract: A backlash reducer for a gear transmission system comprises a main gear and an auxiliary gear which form one of a driving gear and a driven gear in mesh therewith of the gear transmission system. The main gear is mounted on a rotary shaft for rotation therewith, and the auxiliary gear is mounted on the rotary shaft for rotation relative thereto. A backlash reducing mechanism is operable in response to a centrifugal force due to rotation of the rotary shaft for angularly moving the main and auxiliary gears relative to each other to reduce a backlash between the driving and driven gears. The backlash reducer may further comprise a mechanism for restraining the backlash reducing action of the backlash reducing mechanism. Alternatively, the backlash reducer may comprise a first mechanism operable in response to the centrifugal force to move the auxiliary gear axially thereof and a second mechanism for converting the axial movement of the auxiliary gear to circumferential movement thereof.

Abstract: A gear assembly for high-speed transmission between either two parallel shafts or two intersecting shafts comprising two meshing gears, one mounted to a drive shaft and the other mounted to a driven shaft, each of the gears having coaxially disposed first and second toothed portions which differ from each other in that the teeth of the first toothed portion are cut at a first inclination angle and the teeth of the second toothed portion are cut at a second inclination angle different from the first inclination angle. One of the meshing gears is fixed to its shaft so as to be non-displaceable axially, while the other is mounted so as to be axially displaceable with respect to the fixed gear.

Abstract: A carriage or slide of a machine tool is moved along a supporting guideway or way by a pair of driven pinions engaging a rack, and each pinion is mounted on the output shaft of a corresponding planetary gearbox. The input shafts of the gearboxes are driven by a reversible electric motor through an endless belt and pulley system. A pair of belt tension wheels engage the endless belt and are supported by a set of spring biased slide members which cooperate to establish a predetermined tension in the belt and a predetermined preload torque on the input and output shafts of the gearboxes to produce a corresponding anti-backlash force of the pinions against the rack.

Abstract: A signaller part (13) is coupled drivewise with a transmitting element (2), on the one hand by a force transmitting connection and on the other hand in a form-locked and slip-free manner via a transmission (5, 6, 8, 9, 10) which exhibits backlash. The transmission element (2) is compulsorily coupled with a machine part (4) the position of which is to be adjusted. As a result of its transmission ratio the transmission (5, 6, 8, 9, 10) only permits a reduced speed of the signaller part (13) relative to the transmitting element (2). When, after reaching the selected position, the machine part (4) attempts to move away from this position in a direction of movement which opposes the preceding adjustment movement, then the signaller part (13) is initially moved by and with the transmitting element at unreduced speed as a result of the backlash of the transmission, i.e. the departure from the selected position is indicated with increased accuracy.

Abstract: A shaft assembly (11) having a spline (16) with an anti-backlash device operable due to centrifugal force to engage both sides of internal spline teeth during rotation. The spline (16) includes a main force transmitting portion (18) and a moveable spline sleeve (22) which during operation engages the side of teeth opposite the side engaged by the main force transmitting spline. Spline sleeve (22) rides on helix member to move slightly circumferentially as it is moved axially by a centrifugal force actuated member. A bar which is pinned to the spline (16) has one end which moves radially outward due to centrifugal force as the spline (16) is rotated and another end which engages and moves the spline sleeve (22) axially. When the spline sleeve (22) is moved, the splined end on the shaft assembly (11) is locked or wedged into engagement with the mating internal spline (14).

Abstract: In a manual power transmission for automotive vehicles, a gear noise suppressor and vibration isolator includes elastomeric sleeve preferably fitted within several holes through the thickness of the gear wheel, angularly spaced about the axis of the wheel. The spacers define a space within which a metal sleeve is inserted and the sleeve defines a central bore through which a pin is fitted. A load plate located adjacent an end face of gear wheel has teeth formed on its outer periphery which are adapted to mesh with the teeth of an input pinion with which the gear wheel is continuously engaged. Pins having a headed end that abuts the load plate hold the plate in contact with the elastomeric sleeves and prevent contact of the load plate against the gear wheel. The sleeves resiliently deflect and permit engagement of the load plate and gear wheel with the drive pinion.

Abstract: A fluid-powered helical actuator including a body, a rotatable shaft member, first and second independently rotatable sleeves reciprocally mounted within the body, a piston reciprocally mounted in the body to produce axially movement in response to the application of fluid pressure, and torque-transmitting ball races and balls for transmitting torque between the sleeves and the body, and the sleeves and the shaft. An adjustment collar is provided for applying an adjustable and oppositely directed axial force on the first and second sleeves for selective relative axially movement thereof to axially preload the first and second sleeves for simultaneously eliminating backlash in all the ball races. In one embodiment, the collar is replaced with a cam ring. An alternative embodiment utilizes a non-cylindrical body a dimension in a first lateral direction greater than a dimension in a transverse second lateral direction.

Abstract: A method and apparatus for creating a matched set of pseudo herringbone-type gears from ordinary helical gears. Two cooperating shafts are provided with two helical gears on each which, when placed on the shaft, are oppositely angled with respect to one another, and which when combined together, herringbone gear profiles. The two cooperating shafts are held in a helical gear matching fixture which allows precise alignment of the helical gears in the creation of a matched pair of herringbone gears.

Abstract: A gear assembly comprising two gears and a spring in the form of a C-shaped clip interconnecting the two gears. Two pins are provided on one of the two gears and the spring has two holes, one in each end thereof, whereby the spring can be carried by one gear in a prestressed state by means of the pin-and-hole connection. The other gear has a third pin thereon. The spring has a third hole into which the third pin is inserted. Thus the assembly work can be accomplished simply by resting the second gear on the first gear. An end of the third hole engages with the third pin to create a spring force necessary to provide nonbacklash mating with a third gear.

Abstract: A fluid-powered helical actuator including a cylindrical body; a rotatable output member supported for rotation relative to the body and connectable to an external device; first and second independently rotatable sleeves reciprocally mounted within the body; a piston reciprocally mounted within the body for application of fluid pressure to one or the other opposing sides thereof to produce axial movement, the piston operatively engages at least one or the other of the sleeves to axially move the sleeves in response to axial movement of the piston; and torque-transmitting elements for transmitting torque between the first sleeve and the body, between the first sleeve and the output member, between the second sleeve and the output member, and between the second sleeve and the body.

Abstract: A driving connection between spline shafts and spline bore hubs of safety steering columns, where the shaft and the hub, because of prestressing torque existing between the two, can be shifted with respect to one another axially but are free from torsional play. The prestressing torque is generated by a torsion spring element supported between the shaft and the hub. The required freedom from torsional play is achieved by arranging a main hub and an additional hub on the shaft with the torsion spring element connecting the main hub with the additional hub so that the main hub and the additional hub are spring loaded in opposite rotational directions.

Abstract: An industrial robot is disclosed which is movable about six revolute axes, and which is modular in nature, to permit it to be configured to efficiently operate in a number of different applications. The robot includes a support stand defining a first primary axis, a waist which is rotatable about the first axis and which defines a second primary axis disposed perpendicular to the first axis, an inner arm fixed to the waist for rotation about the second axis, an outer arm fixed to the inner arm for relative rotation about a third primary axis, and a hand assembly mounted at the end of the outer arm. In addition, the outer arm includes a simplified drive arrangement composed of three concentric tubular members and respective drive motors, for moving the hand assembly of the robot about three additional axes of movement.

Abstract: A zero backlash shiftable transmission includes an input shaft and an output shaft coupled through a gear network that is preloaded with a spring arrangement to eliminate the backlash from the engaged surfaces of the gear teeth. There are three positions and no neutral. In the first position a tapered clutch arrangement engages the input shaft directly with the output shaft. In the second or shift position, the clutch engages both the input shaft and the output shaft while the transmission is slowed or stopped for shifting. In the third position, the clutch engages the input shaft with the output shaft through the preloaded gear network. The tapered clutch arrangement provides locked clutch coupling in the first and third positions and provides tolerance for shifting without completely releasing either the input shaft or the output shaft in the shift position.

Abstract: A vibration preventing device in an intermittent driving mechanism for intermittently operating a driven member having a specified mass with a motor, includes an elastic body interposed between an operating member and a stationary member facing thereto which are disposed in a motor power transmission system, and a friction surface formed between the elastic body and the operating member or between the elastic body and the stationary member, whereby at the time of starting the motor, the load on rotation of the motor is gradually increased by elastic deformation of the elastic body.

Abstract: A feed mechanism for moving a read/write head in a disk drive unit includes a pinion drivable by a motor, a rack held in mesh with the pinion, a support on which the rack is pivotally mounted and which is movable with the rack in a linear direction, and a compression resilient member such as a compression coil spring or a torsion spring having one end fixed to the rack and an opposite end fixed to the support for urging the rack in forced mesh with the pinion and for urging the rack in the linear direction. The feed mechanism also includes a pinion holder fixedly mounted on the rack and extending along the linear direction, the pinion holder having a member disposed in confronting relation to the pinion and spaced therefrom for preventing the rack and the pinion from being thrown out of mesh with each other.

Abstract: Between a drive unit (not shown) and a driven unit (not shown) there is a gear train (2,7) which includes tuned bars (1, 10) which are so dimensioned that, in operation, the nodes in the torsion vibration to which the system is subject are situated in said tuned bars.

Abstract: A toy suitable for attaching to infant furniture has an elongated track having ends with connecting members positioned on the ends of the track for connecting to an appropriate portion of the infant furniture, such as the side rails of a crib. A housing is mounted along the track. The housing includes a motor and associated components which drive the housing along the track. A stop member is located on each of the ends of the track. The housing includes a sensing lever which is engaged against the stop members on the respective ends of the track, so as to switch the direction of travel of the housing along the track. The housing also includes a musical device and a gear train driven by the motor for producing a constant output to drive the musical device.

Abstract: A driving gear wheel (2) meshes with a driven gear wheel (6) which is fixed to rotate on a shaft (5) and is associated with two toothed wheels (8 and 10) situated on either side thereof. The toothed wheels are connected to the gear wheel (6) by resilient tabs (13 and 13') which are pre-stressed so as to provide opposite angular offsets between the gear wheel (6) and the toothed wheels (8 and 10). This type of device is applicable, in particular, to stepdown gear drives for use in robotics.

Abstract: The invention relates to a device for the transverse and/or longitudinal machining of wood workpieces having at least one clamping table which is rotatable or tiltable about at least one pivot axis. The clamping table is connected to a drive gear of a servo drive positioned in the pivot axis. So that the servo drive of the device can also operate free from play during a machining operation, an output gear wheel having front and rear tooth flanks and connected to a servo motor via a drive gear and a sprocket wheel are secured on an output shaft. The sprocket wheel is in engagement with a tension chain which exerts a torque on the output shaft in a predetermined rotational direction, one free end of the tension chain being connected to a controllable fluid cylinder so that in any rotational direction of the servo motor or of the output shaft, either front or rear tooth flanks of the output gear wheel are constantly in contact with corresponding flanks of the drive gear.

Abstract: A steering mechanism in a motor vehicle having front and rear wheels steerable in response to steering operation of a steering wheel. An input shaft rotatable about its own axis in response to steering operation of the steering wheel has an eccentric shaft mounted on a rear end of the input shaft. A tubular member is rotatably fitted over the eccentric shaft and has an integral pinion and an integral eccentric cam. An internal gear disposed in fixed relationship to a vehicle body of the motor vehicle is held in meshing engagement with the pinion. A pair of tie rods supporting the rear wheels, respectively, is interconnected by a joint member rotatably mounted on the eccentric cam.