Abstract: A worm speed reducer consisting of a worm made of a relatively hard material such as cast iron or steel and a worm wheel made of a relatively hard material such as cast iron. A material strength is set so that an amount of wear of the worm becomes larger than that of the worm wheel. A tooth surface of the worm wheel is formed with a network irregularity extending in both a direction of a cutting scratch due to cutting and a direction intersecting the direction of the cutting scratch, and also formed with a chemical conversion coating having a thickness smaller than a height of the irregularity. A tooth surface of the worm is formed with a network irregularity extending in both a direction of a cutting scratch due to cutting (or a grinding scratch due to grinding) and a direction intersecting the direction of the cutting scratch (or the grinding scratch) of the worm, and also formed with a chemical conversion coating having a thickness smaller than a height of the irregularity of the worm.

Abstract: A speed reducing device employs dampers which are provided for power transmission from a worm wheel engaged with a worm gear to an output shaft of the device so as to absorb shocks. The device does not require a metallic plate to which the dampers are adhered nor a bearing which specifically supports the output shaft. A first wheel is engaged with the worm gear and has protrusions on its plate surface facing a second wheel. The second wheel is rigidly connected to the output shaft and has protrusions on its plate surface facing the first wheel. The protrusions of the first and second wheels take complementary positions, in which each protrusion of one wheel is apart from the adjacent protrusion of the other wheel a predetermined distance with respect to the rotational direction. The dampers are provided between neighboring protrusions of the first and second wheels so that the dampers are pressed and contracted to elastically transmit power from the first wheel to the second wheel.

Abstract: A power seat slider comprises a gearbox with connecting mounting brackets integrally connected therewith. A mounting surface portion of the gearbox faces an inner wall of a seat slide rail and is provided with a positioning projection. Upper portions of each of the connecting mounting brackets are also provided with positioning projections to assure proper engagement between drive portions of the seat slider mechanism.

Abstract: The invention is used in an actuating drive comprising two friction partners, in particular a geared actuating drive with a toothed worm wheel which braces itself radially with a cup-shaped edge part against an outer rim part of a concentric slave disc which is driven over an at least tangentially elastic damping liner. The invention is designed to prevent squeaking noises between the friction partners when there is reciprocal relative movement, and to require minimal expenditure of time and energy for construction and assembly. The invention provides in each case for the one rim part to have an even edge surface and for the other rim part to have an uneven friction surface, with elevations only abutting on the one friction surface and with depressions situated inbetween.

Abstract: According to this invention, backlash is eliminated through the use of a split-worm that is preloaded by having a first part of the worm fixed in a stationary position on an input shaft and the second part of the split-worm mounted for limited axial movement along the input shaft relative to the stationary part of the split-worm. Both parts of the split-worm rotate with the input shaft, unlike the prior art. The ball gear uses recirculating balls instead of gear teeth to transmit the tangential load from one gear member to the other. The balls roll through ground grooves in the worm halves and thus drive the ball gear. The balls recirculate through an internal passage extending through the two parts of the split-worm. The ends of the internal passage communicate with the grooves on the exterior of the split-worm.

Abstract: An actuator includes a worm provided with a shaft-engaging hole, a motor provided with a shaft having a worm-engaging part for detachably engaging the shaft-engaging hole of the worm and an end cover having a worm-supporting hole for rotatably supporting at least one end of the worm whereby it is possible to provide a compact actuator which is easy to assemble. The motor and worm are supported between upper and lower complementary casings.

Abstract: A balanced worm gear attachable to an output shaft of a motor so as not to disturb the balance of the output shaft. The overall length of the worm gear is set to be an integral multiple of a predetermined pitch L of the worm tooth. The formed worm gear has symmetrical ends which can further be more closely balanced by chamfering the ends.

Abstract: A mechanism used to control the vertical height as well as fore-aft position of a vehicle seat while presenting a minimum height profile when adjusted to minimum vertical elevation. The seat is connected to a pair of rails, one stationary and one reciprocable. A seat is affixed to an attachment bracket which is connected to the reciprocable rail by a vertical height adjuster comprising a vertically oriented screw jack which may be positioned to selectable heights by a motor. The fore-aft relationship of the rails may also be selectively adjusted by a motor driving a horizontally oriented screw jack. Both screw jacks incorporate a screw connected to a helical gear engaged to a worm gear. The worm gear is driven by a remote motor through a flexible drive cable. Both screw jacks present a structure which offers a minimum height profile when the seat is positioned at minimum vertical height.

Abstract: In a small-sized motor with a worm reduction gear wherein a worm, an armature and the like are coupled onto the outer periphery of an intermediate portion of a motor shaft and fixed thereto; the motor shaft is inserted into a gear case, whereby a worm wheel is meshed with the worm; a journal member having the outer diameter larger than that of the worm is projectingly provided at a position close to the worm of the motor shaft; a bearing in the intermediate portion is fixed to the gear case; and the journal member is supported by this bearing in the intermediate portion.

Abstract: In the motor with the worm reduction gear, wherein a worm is provided at an end portion of a rotary shaft, a worm wheel is in meshing engagement with the worm and rotation of the rotary shaft is reduced in speed and transmitted to load, such an arrangement is adopted that a first damper and a second damper, which are different in elasticity from each other, are provided at end portions in the axial direction of the rotary shaft, and, at an initial stage where the thrust force from the rotary shaft is low, only the elastic force of the first damper lower in elasticity acts on the rotary shaft and, at a stage where the thrust force becomes high, both the elastic forces of the first damper and the second damper act on the rotary shaft.

Abstract: A motor output shaft positioning device for motors with worm reduction gears for outputting the output of a motor output shaft via a worm reduction gear, comprising a gear case having a hollow part for housing a worm fitted to a motor output shaft and a worm wheel meshing with the worm and receiving an end of the motor output shaft; the hollow part receiving a bearing of the motor output shaft and a steel ball; a bearing holder having projections projecting towards the bottom of the hollow part, and a filler that is injected into the hollow part through a filling hole formed on the hollow part.

Abstract: An electric operator for a sliding door mounted for sliding movement along a track, comprising a motor having an iron cooling flywheel disposed on a drive shaft thereof, the flywheel being provided for imparting a predetermined amount of inertia for starting and stopping of the motor such that the operation of the motor is characterized by a soft start and stop. A worm gear reducer is connected to the drive shaft for effecting a predetermined reduction ratio of rotation. A limit switch is coupled to the reducer for limiting rotation of the drive shaft to a predetermined number of rotations, and apparatus is provided for coupling rotation of the drive shaft to the linear movement of the sliding door along the track.

Abstract: An improved fluid-strainer is provided which makes provision for improved methods of converting the same between motorized and manual modes. Included in the fluid strainer is a gear motor housing for facilitating the conversion as well as inspection and removal means. Also provision is made for flushing of the fluid strainer so as to avoid cycle restart.

Abstract: A gear speed reducer having an input shaft formed with a worm which meshs with a worm gear mounted on an output shaft disposed a fixed distance from and at right angles with respect to the input shaft. The worm is provided with an involute thread that progressively becomes thinner from one end to the other end of the worm. An adjustable cartridge rotatably mounts one end of the shaft and the cartridge is adjustably mounted to permit axial adjustment of the shaft to bring a new section of the thread of the worm into engagement with the worm gear to eliminate backlash therebetween. The adjustment is quickly and easily performed without having to remove the reducer from service.

Abstract: A damper device for a motor includes a worm wheel meshingly engaged with a worm on a motor shaft. The worm wheel has a tubular flange in which a plurality of recesses are formed. A rotatable torque transmission disk is connected to an output shaft for rotation therewith. The torque transmission disk has a plurality of radial protrusions formed on an outer periphery thereof. A resilient damper/coupling member is interposed between the worm wheel and the torque transmission disk so as to transmit a torque of the motor to the output shaft. The protrusions of the torque transmission disk are loosely fitted respectively in the recesses in the flange of the worm wheel. With this construction, when a large load is applied to the output shaft, the protrusions are abutted respectively against the edges of the recesses, thereby preventing an undue deformation or twisting of the damper/coupling member.

Abstract: A grease guide structure for a transmission device suitable for a sunroof of an automobile or the like. The transmission device includes a worm wheel and a pinion shaft, which are drivingly connected through a friction clutch mechanism. In order to prevent grease flowing from the worm wheel onto the friction clutch mechanism, a cup washer is mounted between the worm wheel and the friction clutch mechanism, with the center portion of the cup washer being higher than its peripheral portion. Therefore, if grease falls onto the cup washer, it will further flow and finally fall into a grease intake slot which is arranged below the cup washer to be stored therein.

Abstract: An internal worm drive has a worm gear and a substantially hollow tubular worm with an outer surface and an inner surface. The inner surface has at least one internal worm thread mating the worm gear. The axis of the worm gear is substantially perpendicular to the longitudinal axis of the tubular worm. Utilizing the tubular worm with the threaded internal surface in conjunction with the mating worm gear is an oscillating roller assembly suitable for use as an ink roller in lithographic presses. The oscillating roller assembly has a shaft, and a bearing unit mounted along the shaft. The worm gear having a plurality of teeth is contained in a slotted space in the bearing unit and the shaft such that the rotational axis of the worm gear is substantially perpendicular to the longitudinal axis of the bearing unit and the shaft. The slotted space has first and second opposite longitudinal ends within the shaft.

Abstract: A power seat slide device includes a pair of parallel stationary rails and a pair of parallel movable rails axially slidably engaged with the stationary rails. The movable rail and the stationary rail are assembled to define therebetween an elongate tunnel which extends along a common axis of the stationary and movable rails. A threaded shaft is housed in the elongate tunnel and has both ends rotatably supported by the movable rail. A nut is received in the elongate tunnel and fixed to the stationary rail. The threaded shaft is operatively engaged with the nut so that rotation of the threaded shaft about its axis induces a longitudinal movement of the movable rail relative to the stationary rail. An electric motor is mounted on the movable rail and has a drive shaft. A gear mechanism is arranged between the drive shaft and the threaded shaft for transmitting a power of the drive shaft to the threaded shaft. A gear housing houses therein the gear mechanism.

Abstract: As the first aspect of the invention, an actuator in a power antenna device includes a worm provided on a shaft of the motor; a first gear unit integrally including a worm wheel and a small intermediate gear; a second gear unit integrally including a large internal gear and a part of a clutch device; reduction gears including first reducing gears (a pair of the worm gear and the worm wheel) and second reducing gears (a pair of the small intermediate gear and the large internal gear); and a support board made of a hard material such as metal and integrally fixed to a casing for the actuator, and which rotatably supports the first and second gear units on the side where the small intermediate gear and the large internal gear engage.

Abstract: A reduction gear is shown, which is designed to facilitate assembly of essential parts in a case. The reduction gear comprises a worm; a worm wheel meshed with the worm; a lower case part having a semicylindrical recess which rotatably receives the worm, and an upper case part to be mounted on the lower case part to close the semicylindrical recess. The semicylindrical recess has an opening which is so sized as to permit insertion of the worm into the semicylindrical recess therethrough. A threaded bore is formed in the lower case part, which is merged and aligned with the semicylindrical recess. A bolt is screwed into the threaded bore having its inside end pressed against one axial end of the worm for achieving a stable rotation of the worm in the semicylindrical recess.

Abstract: A rotary driving apparatus including internally-meshing planetary reduction gear to which the output rotation of a motor is inputted, a drive shaft to which the output rotation of the planetary reduction gear is transmitted, an output rotary shaft to which the rotation of the drive shaft is transmitted, and a rotary flange provided on the output rotary shaft with a wheel mounted on the flange. The speed of the output rotation of the motor is reduced and then transmitted to the wheel so as to cause a vehicle to run on the wheel.

Abstract: The present invention relates to a movable conveyor for construction sites. The platform includes: (a) a stage having two opposite end portions for conveying objects thereon; (b) a pair of elongated arms attached to the respective end portion of the stage, slidable and rotatable with respective to the stage in a horizontal plane; (c) a plurality of holders installed in the arms, the holders being adapted to grasp the structure and to hang therefrom; (d) a driving mechanisms to slide and rotate the elongated arms with respect to the stage and the holders; and (e) controller for sliding and rotating the driving mechanisms and for holders and releasing the holding, whereby the stage is conveyed with respect to the structure.

Abstract: An improved mount for parabolic or similar antennas which allows for easier and more precise positioning of the antennae while providing a secure mount. The antenna mount includes a strut support mount in a mount base which comprises a circular plate with two parallel flanges. The two parallel flanges each have a hole in approximately their center which line up with a pair of diametrically opposed holes in the strut support mount. A turnbuckle assembly further secures the mount base to the strut support mount. Also included is an antenna pivot which includes a worm wheel at its base and a structure for securing an antenna. The antenna pivot is rotatably mounted on the mount base. A worm bracket assembly is affixed to the mount base in a manner such that the worm within the worm bracket drivingly engages the worm wheel of the antenna pivot.

Abstract: A motor case end plate structure, comprising: a motor case accommodating a motor unit therein and provided with a first radial bearing for a rotor shaft of the motor unit; a radial flange provided at an open end of the motor case; and an end plate, made of molded synthetic resin, having a second radial bearing for the rotor shaft and adapted to be attached to the motor case by way of the flange; the end plate being provided with at least three separate peripheral mounting surfaces disposed around the rotor shaft and projecting from surrounding parts so as to substantially directly abut an outer end surface of the flange of the motor case. Thereby, any error in the planeness of the mounting surfaces or any error in their perpendicularity with respect to the axial line of the motor unit can be readily corrected by shaping the part of the die for molding the end plate corresponding to the mounting surface to be corrected without requiring excessive cost or time.

Abstract: A variable valve actuating device and method are disclosed, the device including a rotatable cam having a selectively configured cam face engagable with a worm drive at an outer engaging surface of the cam, the worm drive being configured for both rotary and axial movement, rotary movement imparting rotational motion to the cam face, and axial movement changing relative valve timing. The device preferably includes a plurality of such rotatable cams engagable with different ones of a plurality of worm drives to thus provide selective variation of valve opening and valve closing times independently of one another, with open-valve duration being variable to occur at any point in an overall operating cycle of the system.

Abstract: A rotation transmitter using balls comprises a worm gear having a ball circulation path, a large number of metal balls inserted into the ball circulation path in a continuous row, a worm wheel having a large number of ball recesses for accommodating balls on the periphery thereof and meshed with the worm gear via the metal balls, collars provided at the opposite ends of the worm gear, and ball guides of semicircular sectional configuration provided to project tangentially from the collars and cover the ball ports of the worm gear. The ball circulation path is constituted of a helical ball race formed on the outer surface of the worm gear, ball ports formed at the ends of the ball race and a ball circulation passage provided to extend diagonally through the interior of the worm gear at a position offset toward the surface of the worm gear from the axis thereof so as to cause the openings at the opposite ends of the ball circulation passage to connect with the ball ports at an obtuse angle.

Abstract: A geared motor comprising a rotating axle rotating in accordance with the rotation of a rotor, a gear rotating axle for outputting from the rotating axle speed reduced rotation, and a flexible coupling consisting of a first coupling disposed on the rotating axle of the rotor and rotating together with the rotating axle and the rotor, a second coupling disposed on the gear rotating axle, and rotating together with the gear rotating axle, a rubber damper disposed between the first coupling and the second coupling for transmitting the rotation of the first coupling to the second coupling, a thrust-force bracing member disposed between the rotating axle of the rotor and the gear rotating axle and in contact with the rotating axle and the gear rotating axle, for transmitting thrust force from one of the rotating axle of the rotor and the gear rotating axle to the other of the two arranged so that even if thrust force acts on the rotating axle of the rotor or on the gear rotating axle, the thrust force does not act

Abstract: A massage device that simulates the action of the human fingers when applied to the head or body. A compact and portable appliance with a kneading mechanism, powered by a small electric motor. The motor is mounted horizontally and has twin shafts that extend beyond the ends of the motor. Gears are attached to both shafts, which are connected to an impart reciprocating motion to a pair of massage fingers. The speed of the motor may be varied by the switch. The kneading action is produced by bunching and releasing of the skin through reciprocating fingers powered by the motor.

Abstract: A motor and associated gear system share an extended shaft axial with the motor. A rotor and a driving gear are attached to the shaft. Such an integral gearmotor concept minimizes coupling and sealing problems associated with prior art coupled motors and speed reducers. Particular housing features further enhance integrated advantages of the invention. Also, a reduction in the number of separate parts and use of a shim technique for establishing the stator/rotor air gap of the motor reduces prior art manufacturing costs associated with high precision borings while maintaining the accuracy of critical air gap characteristics. The shim feature of this invention is also equally and generally applicable to the establishment of air gaps in motors other than the present integral gearmotor.

Abstract: A lubrication retainer and distribution system for a worm gear and the mating worm. Porous pads saturated with lubricating fluid are attached to both sides of the worm gear and located so that they spread slightly and wipe the high ridges of the worm. To equalize the fluid distribution between the pads, at least one through hole is formed in the worm gear between the pads, and the hole's size is selected so that capillary action transfers the fluid between the pads as required. Also, to retain the lubricating fluid on the worm, "O" rings are fitted tightly upon the worm shaft just beyond the spiral thread of the worm to act as barriers to prevent fluid from escaping from the system along the worm shaft.

Abstract: A torque limiting mechanism has two locking members (1 31, 137) designed to be incapable of transmitting drive between them but having meshing spiral teeth (132, 138). The members are in a rotatable frame (127) and are respectively driven by radially toothed gears (128, 124) having an idler gear (125) between them. One radially toothed gear (124) is splined (at 123) to a section of a drive shaft (110) of reduced diameter so that it twists in torsion when an input driving torque is applied to the shaft (110). Gear lash exists between the radially toothed gears (124, 125 and 128) which is overcome by the twist of the shaft (110) if the applied torque is big enough. When this occurs, synchronous drive from the input shaft (110) is applied to both locking members (131, 137) so that they rotate together. The applied torque necessary to achieve this is determined by the position of one gear (124) on the spline (123) and this is controlled by a lever (114).

Abstract: In order to produce a window-actuator drive having assembly and service friendliness, particularly by providing a design which enables the gearbox unit to be easily exchanged, the drive is designed as two functionally separate units. A gear housing, a worm gear, and a housing cover which is sealed off from them both makes up a first unit. A cable housing with a cable pulley makes up a second unit. The subassemblies of the first and second unit can be assembled by means of notched, snap-fit connections.

Abstract: In a window-lifting actuating drive where two cup-shaped housings enclose a driven worm gear coupled to a cable pulley, a flat seal is configured to seal the worm gear housing from ambient moisture both at the joint between the two housings and between the cable pulley housing and the worm gear. The flat seal is also formed to allow the seal to be prefit to the cable pulley housing and retained to the housing before the housing is assembled to other components of the actuating drive.

Abstract: The present invention relates to a speed reduction apparatus for globoid worm gears. The speed reduction ratio of the engaged worm globoid worm gear and worm wheel is defined as the ratio of the rate of rotation of the globoid worm gear about its axis to the rate of rotation of the worm wheel about its axis. The structure of the present invention speed reduction apparatus is defined by the distance between the axes of rotation of the worm wheel and globoid worm gear and the spacial and speed relationships between the globoid worm gear and the surfaces of the cutting tool employed to generate the worm gear.

Abstract: A drive motor (1) with a shaft (3) drives a power takeoff shaft (5) via a planetary differential gear (2). The second input shaft (4) of the gear (2) is connected to a servo motor (10) via a worm gear (6). The worm (7) of the worm gear (6) is at least half as large as the worm gear (8). The pitch angle of the thread of the worm gear (20) lies between 5.degree. and 9.degree.. The rotational speed of the servo motor is controlled by a control (9). As a result of this design, a large controllable range of rotational speed is achieved with a lower power output from the servo motor. In this way, a large output power can be precisely regulated with little regulation effort. The drive has a high dynamic ratio and is suitable, for example, for cranes and elevators.

Abstract: A reclining device for vehicle seats utilizes a differential reduction gear (A) and a small size high speed motor (27) as a drive source, wherein one gear (10) having a plurality of slots (15) positioned radially outwardly from the axis of the gear is between another gear (16) having a corresponding number of slots (20) in alignment with the slots (15) in the one gear and a bracket (22) associated with the other gear (16) and held in position by rivets (12,21) through the aligned slots in the two gears to thereby regulate the adjustment range of the reclining angle. The motor output shaft (27a) and reduction gear (A) are connected by a resilient joint (35), a resilient member (32) is interposed between the motor and coupling (33) or between the coupling and reduction gear (A) to prevent oscillation and noise, and a coiled spring (43) acts on one end of the worm shaft (30a) of the reduction gear to prevent play between a worm (30 ) and worm gear (29).

Abstract: A worm gear for driving devices such as automobile power windows and power seats the operating positions of which have to be precisely determined. The worm gear motor has a built-in sensor means having a torque transmission plate engaged with a motor-driven worm wheel having an output shaft in its center and at least one circumferentially extending notch on the periphery, a magnet disposed on one side of the torque transmission plate along the path of the notch during rotation of the torque transmission plate and a magnetic sensor disposed on the other side of the torque transmission plate opposite the magnet. The sensor repeats ON-OFF cycles according to the presence or absence of the notch while said motor is in operation, detecting a predetermined rotational position of the output shaft by the signal attained by the sensor, and attaining a high positional determination of the motor output shaft regardless of backlash of engaged gears and mechanical inertia of the motor components.

Abstract: An apparatus for limiting the axial play of the shaft of a motor drive mechanism wherein the precise setting of the axial play (<<0.05 mm) is possible in a simple manner using production and assembly technology. A deformable guard plate, which is secured on its marginal side by a setscrew, in particular a standard production screw, is axially pressed in a contact zone until the desired axial play is achieved. The setscrew is axially supported in front on the case side.

Abstract: A miniature motor with a worm reduction gear comprising a miniature motor having a motor shaft, which is of a relatively small diameter and which is extended to a predetermined length, at least three bearings supporting the motor shaft, and a worm having a shaft hole into which the motor shaft is inserted. Since the miniature motor and the worm reduction gear are manufactured separately, and subsequently assembled together by press-fitting the motor shaft in to the shaft hole of the worm the assembly of the miniature motor with a worm reduction gear is facilitated. The use of a motor shaft having a diameter smaller than the diameter of the worm helps reduce the size and weight of the miniature motor with a worm reduction gear.

Abstract: A one-way clutch for a reduction-geared motor having a reversible electric motor and reduction gears allows an output shaft thereof to rotate in a normal direction and firmly prevents the output shaft from rotating in a reverse direction when the reversible electric motor is not fed. The one-way clutch includes a transmission gear supported on the output shaft wherein a sawtooth is provided on one side of the transmission gear. A clutch, axially movable relative to the output shaft, has a sawtooth facing the sawtooth of the transmission gear. The clutch also provides a radially located rotation-prevention portion. A compression spring is included for urging the clutch for the transmission gear in a direction along the axis of the output shaft. A stopper pin in the gear casing is inserted into the rotation prevention portion of the clutch. An electromagnet in the gear casing urges the clutch in a direction opposite to the direction urged by the compression spring when the electromagnet is fed.

Abstract: A gear backlash adjusting mechanism includes a worm wheel having a gear tooth that engages the gear tooth of a worm. The gear tooth of the worm wheel is curved or tapered upwardly in the axial direction toward one end of the worm wheel. An adjusting apparatus permits the distance between the gear tooth of the worm wheel and the gear tooth of the worm to be adjusted so that the amount of backlash between the gear tooth of the worm wheel and the worm can be adjusted.

Abstract: A universal load sensing gearbox integrating a safety mechanism for use, for instance, with motor driven closures, such as garage doors, barriers and gates, includes a housing which encases a worm slidably mounted on an input shaft and adapted for rotation therewith. The input shaft is connected with the motor driving the closure. The worm is engaged with a worm gear which is mounted on an output shaft which is connected with the closure. Dished washers are provided generally around the input shaft at both ends of the worm to urge the worm in a central meshed engagement with the worm gear. A motion transmission device is provided on the worm and is adapted to slide therewith to detect a longitudinal movement thereof and to transmit this movement to an actuating device which is adapted to stop and/or reverse the motor.

Abstract: A self-locking mechanical steering helm for a boat includes a worm gear set having a worm fixed on the steering wheel shaft and a worm gear clustered with a cable sprocket for controlled the movement of the steering cable which extends to the outdrive of the boat.

Abstract: The present invention relates shortly to an angular gear (1) for use in venetian blinds for angular adjustment of the venetian blind laths from a place beside the venetian blind. The angular gear (1) consists of three parts, a gear housing (2), a shaft (3) provided with a helical gear (10), and a pinion (4), the shaft (3) being provided with or constituting an operating means and a pinion (4) meshing with the helical gear (10) being anchored to the shaft suspending the venetian blind laths, by the aid of ladder bands attached to the shaft. The shaft (3) is provided with at least one bearing portion of circular cross section and this bearing portion cooperates with a complementary bearing portion in the gear housing (2).

Abstract: A rotation transmitter includes a worm shaft having an hourglass-shaped portion at the center thereof, a plurality of metal balls arranged in a row on a ball circulation path, a cylindrical housing for rotatably accommodating the worm shaft therein, a worm wheel inserted in an axial slot in the housing and provided in the outer periphery thereof with ball fitting grooves for receiving the balls, and holding means for holding the worm shaft within the housing so that the worm shaft is rotatable in a state of meshing with the worm wheel via the balls. A helical ball guide groove is formed in the outer periphery of the hourglass-shaped portion of the worm shaft, and a circulation bore penetrates the hourglass-shaped portion obliquely from one side to the other side thereof so that the opposite ends thereof communicate with the associated ends of the helical ball guide groove via tangentially curved guide holes. The ball circulation path is thus constituted by the guide groove and circulation bore.

Abstract: A worm reduction gear assembly has a casing or housing composed of two tube parts and three flanges on ends of the tube parts. The worm wheel is journaled between bearings in one tube and meshes with a worm in the other tube. The bearings are received in centering bushes which are sealed by seals in grooves formed in the respective tube. A supporting connecting can be provided on the casing or housing for a steering wheel preferably along the center of the worm wheel and worm and perpendicular to the axes of the worm and worm wheel shaft.

Abstract: A levelling system for a camera crane employs a tachometer directly coupled to a horizontal pivot of the crane. The output of this tachometer is used to control a motor which by means of a worm and worm gear controls the level of a camera remote head. A second tachometer is associated with the worm in order to provide a feedback signal to the servo-amplifier so as to maintain the motions of the boom about the pivot and the worm gear in synchronism.

Abstract: An elevator drive has an electric motor 12 which drives a worm 30 that drives a gear 20,28 on a shaft 22, at right angles to the worm 30. The output shaft is in the horizontal plane, and an elevator rope sheave 10 is attached to this shaft 22. The shaft 22 is mounted on two bearings 32,36, at opposite ends of a single piece case 14. The drive is assembled by first inserting the gear 20,28 through the side of the case 14, then inserting the shaft 22 through one end of the case through the gear 20,28 and into the bearing 36. Then a thrust plate 40 is tightened down on the end of the shaft 22 to hold the shaft in place on the bearing's inner race and also thrust the gear 20,28 onto the shaft 22. The worm 30 is then inserted through the top of the case 14. Both shaft support bearings 32,36 are machined on the same axis.

Abstract: Improved steering systems are provided for skid-steering vehicles such as military tanks, track-type tractors and the like. A diesel engine may be used to rotate a drive shaft interconnected by port and starboard planetary gear assemblies, to apply driving power simultaneously to both track-drive mechanisms. Steering is provided by port and starboard hydraulically-actuated motors, each positively interconnected with the ring gear or other suitable component of its respective planetary gear assembly, whereby each track-drive mechanism may be controlled separately and independently of the other.

Abstract: A pivotable screw jack drive for a tiltable element (11,12) such as a rear view mirror of a motor vehicle, wherein a motor driven worm wheel (31) also performs the function of a jacking nut (29) which rotates about a jacking screw (35), the projecting end (41) of the jacking screw being connected to the tiltable element (11,12) for universal pivotal movement but being restrained against relative rotation, the jacking nut (29) being mounted in a housing (22) with a ball joint so that the nut and screw pivot as an assembly.