Abstract: An automatic gearbox has a planetary gear system and fluid pressure operated friction elements which are operable to act on the gear system to change the gear ratios thereof. Operation of the friction elements is controlled by electronic circuits on the basis of electrical signals indicative of vehicle speed and throttle opening. A manually operable switch is provided for selecting reverse gear and for providing manual overriding signals for the selection of forward gears. The electronic circuits are so arranged that, when a gear is selected manually, operation of the friction elements associated with the gear or gears higher than the selected gear is not carried out until vehicle speeds at least equal to the vehicle speeds at which the said friction elements are operated at full throttle opening in the automatic mode of operation.

Abstract: An improved drive for driving the axles of an electric rail car wherein the drive includes an electric motor having a stator and a rotor arranged between the axles of the rail car and transmissions each arranged at an end of the shaft of the rotor and each including a pinion member for coupling energy from its respective rotor shaft end to a drive axle, and wherein the improvement comprises: planetary drives each arranged to couple torque from an end of the rotor shaft to the pinion of the transmission associated therewith; each planetary drive including: a sun gear formed by a geared section at the end of the rotor shaft, three planetary gears arranged in a stationary planet carrier and disposed so as to be driven by said sun gear; a hollow gear arranged to be driven by said three planetary gears and a curved gear coupling arranged between said hollow gear and the shaft of the pinion for transmitting torque thereto.

Abstract: A compact manual transmission includes an input shaft and plural countershafts, one of which serves as the output shaft and the other of which serves both as a countershaft for obtaining a low reduction ratio forward drive and as a reverse idler shaft. Low forward drive is through a gear train comprising three reduction ratio gear sets controlled by a single clutch. Reverse drive is through two reduction ratio gear sets controlled by a single clutch. The transmission is particularly adaptable for use in an automotive vehicle having a transversely mounted engine. The transmission is further adaptable for direct connection with the ring gear of an associated differential, such as in a front-wheel drive vehicle.

Abstract: A reversible power transmission having a pair of axially spaced selectively actuable brakes each including fixed stator disks and rotor disks. Two ring gears each have gear teeth on inner and outer surfaces with the outer teeth enmeshed with inner teeth on the rotor disks. An input shaft carries a driving sun gear. An output shaft is aligned with the input shaft. A cage carried by the output shaft has two arrays of idler pinion gears journaled in the cage with the first array driven by the sun gear and driving the second array. Each pinion of the first array is enmeshed with teeth on the inside of one of the ring gears, and each pinion of the second array is enmeshed with teeth on the inside of the other ring gear.

Abstract: A planetary overdrive gear mechanism for an automatic transmission utilizing a double-acting one-way clutch with means to immobilize the cage for the one-way clutch with the rollers in an intermediate position whereby the inner and outer races are free to rotate relative to one another and a brake mechanism for the inner race of the clutch which is integral with the sun gear whereby with the brake applied and the one-way clutch neutralized, an overdrive ratio is established through the mechanism, and with the brake released and the cage control released, a two-way direct drive is established through the mechanism.

Abstract: A variable speed transmission device of the type in which a first rotatable element is in rolling friction engagement with a second nutatable element having an axis movable in a biconical path about the axis of the first elements. The first element supports a pair of axially movable cone-like members fixed for rotation with the first element and each having exterior surfaces of revolution defined by a curved generatrix to be convex in axial section and converging away from the point of first and second element axes intersection. The rolling friction surfaces of the second element are defined by an interior cylindrical surfaces and means are provided for adjusting the angle of the second element axis with respect to the first to vary the radii at the point of frictional contact on the cone-like members.

Abstract: A torque-dependent, mechanical pressure-exerting device for friction gears with a planet wheel, particularly for steplessly adjustable gears, wherein for each direction of rotation, the torque between the drive shaft and the planet wheel is resolved into an approximately radially acting contact pressure and an approximately tangentially acting circumferential force via a pair of curves (cam and counterpart), with one element of the pair of curves disposed on the drive shaft, wherein the other element of the curve pair is disposed on the shaft of the planet wheel.

Abstract: A torque transmission device whereby eccentric drive rollers engage a raceway disposed within a driven wheel. The wheel's rim has a rolling surface with teeth disposed adjacent to this surface. The wheel's rolling surface engages a fixed surrounding raceway and the wheel's teeth engage a fixed ring of teeth that are adjacent to the raceway. The drive rollers engage the wheel's raceway in a manner that transmits torque to the wheel with leverage thereby substantially reducing the force transmitted to the teeth.

Abstract: A control generator starting from supplied data relative to the functioning of the transmission and of the motor, supplies a transfer voltage proportional to the line pressure. The control comprises a primary electrical loop containing a pressure tap and a secondary hydraulic loop comprising an electro-hydraulic transducer. The line pressure is thus controlled. The stability and control performance of the transmission are improved by means of electrical correction circuits. The apparatus may be adapted to any desired type of automatic transmission.

Abstract: A control system used to change the gear ratio in a gear set regulated by a signal from an electronic control unit is disclosed. A transducer provides an output torque signal which is compared to other signals for controlling the gear change. The ratio change is accomplished through a friction element engaged by hydraulic pressure. A unique diaphragm and solenoid control valve is used responsive to the electronic control unit to follow a shift control ramp to insure a smooth shift.

Abstract: A positive locking differential that functions to compensate for the difference in driving wheel travel which occurs when turning or traveling over uneven ground, while at the same time functioning to prevent wheel-slip when one wheel looses traction. The differential comprises a spider-center cam assembly having four trunnions projecting radially from a center ring on each side of which is located a plurality of fixed driving clutch teeth. The internal diameter of the spider mounts the center cam in such a manner that the same may be rotated a limited, predetermined distance. The center cam is symmetric having cam lifts on each side which include rounded surfaces that provide anti-friction ramps for disengaging driven clutch members mounted on each side of the spider and center cam assembly. The driven clutch members have clutch teeth which correspond to the clutch teeth on the spider and through which a driving torque is transmitted.

Abstract: An epicyclic gear train comprises support spindles for the planet or star wheels cantilevered from a single support flange. The cross sections of the spindles vary with distance from the support plate so that under tangential loading the bearing surfaces of the spindles will assume a position essentially parallel to the axis of the gear train.

Abstract: A roll drive for a machine of the type used in connection with the manufacture of paper. The roll which is to be driven has an end situated at a plane which is normal to the roll axis, and at the latter plane there is a supporting structure which supports the roll for rotation about its axis. Closely adjacent to this plane is a planetary gear transmission having an output and an input. The latter output is connected by way of a suitable transmission structure to the end of the roll for driving the latter with the output of the planetary gear transmission, while a rotary drive is connected to the input of the planetary gear transmission for driving the roll through the latter transmission and structure connected between the planetary gear transmission and the end of the roll.

Abstract: A transaxle, especially for use with small tractors and riding mowers and the like, which provides a plurality of forward speeds and at least one reverse speed and is, furthermore, provided with a transmission portion and a differential portion integrally combined in a single die cast aluminum housing and interposed between the wheels to be driven.

Abstract: A control system changes the gear ratio in an automatic transmission when engine torque is transferred from one member to another member of a three member planetary gear set. This transfer is accomplished through friction elements engaged and released by hydraulic pressure, without the use of one-way clutches. A closed loop electrical circuit is completed between a transducer, which provides an electrical signal related to the output torque of the transmission, and a pair of control valves, to vary the pressure applied by each control valve. A circuit for computing reaction torque is coupled between the transducer and a logic control circuit, which provides logic command signals for controlling operation of components in the closed loop circuit. The closed loop circuit includes two pulse width modulation circuits for regulating operation of the two control valves.

Abstract: The drive system comprises an annular member carrying first engagement means which couple to second engagement means carried by drive motor means. The drive motor means are effective to rotate the annular member about an axis of rotation. Specific features of the invention include the use of hydraulic drive motor means operated through the use of a hydraulic system. The drive system also includes a pair of annular members which cooperate with respect to each other in combination with drive motor means disposed adjacent to each of the annular members. A plurality of drive motors may be used in some of the particular combinations and a single drive motor having a central pinion means and a satellite group of gears may also be used in conjunction with the drive motor means.

Abstract: A novel gear arrangement is provided for coordinately performing two or more functions such as winding a film load within a camera, resetting the shutter thereof and setting the flash cube assembly therein. To effect these functions, an internal gear is provided having an internal annular area provided with gear teeth and an internal annular area free from gear teeth. Operatively connected to the internal gear are a plurality of planetary gears, each having an annular external area of gear teeth and an external annular area free of gear teeth, the respective gear teeth areas being in meshing engagement and the respective areas free of gear teeth being in facing relation. The internal gear is provided with a partially milled or corrugated exterior edge mounted through the camera housing. Rotatably connected to the planetary gears is a planetary carrier provided with at least one, and preferably two, sets of function driving gear teeth.

Abstract: The invention contemplates an improved mechanical traction drive providing a single control whereby a desired range of speed ratios between input and output shafts is selectively available, without requiring clutch connection to the power source, such as an internal-combustion engine. The transmission involves a combination of completely mechanical friction-roller and meshing-gear planetary systems which are connected at all times, whether the single control is operated to call for a forward drive, a stop or a reverse drive of the output shaft. For the particular disclosed form, provision is made for automatic downshifting reaction to increasing load, and major axial-reaction forces are self-contained by rotating mechanism, thus (a) avoiding substantial axial force components on main-bearings of the mechanism, and (b) reducing to very small magnitudes the requisite force for selective control actuation.

Abstract: The invention contemplates an improved mechanical traction drive providing a single control whereby a desired range of speed ratios between input and output shafts is selectively available, without requiring clutch connection to the power source, such as an internal-combustion engine. The transmission involves a combination of completely mechanical friction-roller and meshing-gear planetary systems which are connected at all times, whether the single control is operated to call for a forward drive, a stop or a reverse drive of the output shaft. For the particular disclosed form, provision is made for automatic downshifting reaction to increasing load, the major axial-reaction forces are self-contained by rotating mechanism, thus (a) avoiding substantial axial force components on main-bearings of the mechanism, and (b) reducing to very small magnitudes the requisite force for selective control actuation.

Abstract: A control mechanism for a planetary overdrive gear mechanism for an automatic transmission which utilizes a double-acting one-way clutch with a clutch controller to immobilize the cage for the one-way clutch to allow inner and outer races to rotate relative to one another and a brake mechanism for the inner race of the clutch which is integral with the sun gear of the gear mechanism. The control mechanism includes a servomotor to activate the controller, a servomotor to operate the brake mechanism, a shift valve responsive to vehicle speed and throttle position to actuate the servomotors, and an interlock activated by the controller servomotor operative to prevent fluid actuation of the brake servomotor.