Abstract: A gear reversal mechanism for a hand held power tool is selectively operative to reverse the output of a unidirectional motor and provides a direct drive forward mode and an indirect drive reverse mode, with the selection therebetween being implemented by a manual shift collar operating a cam mechanism selectively to reorient the gear train and consequent direction of motor output. The shift collar is temporarily locked to the gear housing during tool operation by using the operative air pressure of the tool to expand a locking mechanism into locking engagement with such shift collar. With or without the locking mechanism, an exhaust shutoff shift interlock may be provided to permit exhaust air to exit the housing when the shift collar is in either its forward or reverse operating positions or alternatively to close the housing exhaust ports to block exhaust air flow to preclude motor operation when the shift collar is between its operating positions.

Abstract: The disclosed control system for a CVT controls the line pressure which is applied to the secondary pulley to maintain adequate belt tension, at a level significantly lower than previously was produced. An improved throttle valve is provided, and used in this throttle-sensitive regulation of line pressure. An improved ratio valve is provided, which combines spring and fluid forces in a manner to produce the ratio-indicating fluid signal, with negligible loading on the movable sheave where the ratio change is sensed. In the ratio-changing portion of the system, the combination of a timing valve and accumulator valve cooperate in demand type downshifts to provide adequate time for oil flow into the secondary pulley chamber as the primary pulley chamber is exhausted, to keep adequate belt tension during such a downshift.

Abstract: An automatic gear shifting device for operating a gear-shift type transmission in conjunction with a disc type clutch of an automobile, comprising: a control unit; a trigger switch operable by the accelerator pedal of the automobile; detectors for detecting engine speed, automobile road speed, transmission position (gear position) and clutch position and for delivering control signals to the control unit; actuators operable by vacuum produced in the intake manifold of the engine or by a pressurized air or fluid to operate the clutch and the transmission, the actuators each having a solenoid valve through which the vacuum or the pressurized air is applied to the actuator; the control unit, upon receiving and processing the control signals, being adapted to deliver operation signals to the solenoid valves to allow vacuum or pressurized air or fluid to be applied to the actuators in a pre-programmed sequential order to operate automatically the transmission and clutch to adjust to the speed and load condition of

Abstract: A longitudinally mounted drive train for an automotive vehicle usable with either a manual transmission or an automatic transmission. A housing encloses a clutch in the manual drive train or a torque converter in the automatic drive train. The housing is fastened, in the manual drive train, directly onto the housing of the manual transmission or, in the automatic drive train, by means of a bearing support housing to the housing of the automatic transmission. The housing can be formed of two parts. In both drive trains a shaft having a differential bevel pinion can be provided to couple the transmission to a differential to permit front wheel drive or four wheel drive. The use of common components for the normal drive train and for the automatic drive train results in greatly reduced production costs and lower parts inventory.

Abstract: A vehicular control system for automatically shifting a countershaft transmission wherein the power control means is controlled in accordance with a manually operated accelerator pedal and shift requirements. During non-shift modes of operation, the power control means is adjusted in accordance with the manually operated accelerator pedal. During a shifting mode of operation, the power control means is adjusted in accordance with the shift requirements of the transmission. Once a desired gear ratio is engaged in the transmission, the power control setting is returned to correspond with the accelerator pedal setting at a rate dependent upon their difference. Means are also provided for modifying the return rate if the accelerator pedal setting is abruptly adjusted during the return.

Abstract: A transmission with an overdrive is disclosed. It includes an input planetary gear set and an output planetary gear set wherein a first element of the input planetary gear set is connected to a drive shaft and an output element of the output planetary gear set is connected to a driven shaft. The two planetary gear sets are connected with each other through a permanent connection and through a bridging clutch.

Abstract: An automatic transmission for a four wheel drive automotive vehicle comprising a torque converter, an automatic transmission connected to a turbine shaft of the torque converter for transmitting the output of the engine to the front-wheel, a fluid operated clutch for transmitting the output to the rear-wheel, and a pressure oil control for operating the automatic transmission. The pressure oil control includes a pressure regulator valve to produce a line pressure according to the operational condition of the engine and a valve for the clutch. The valve means is adapted to operate the clutch by manual operation, such that the automatic transmission is changed to the four wheel drive.

Abstract: A multi-speed transmission comprising either two or three planetary gear sets arranged in a series with the output from the first and second sets of the series operatively connected to the inputs of the second and third sets of the series, respectively. In all three sets the planetary gear carrier is the output member thereof. All three sets have a direct drive clutch for operatively connecting their respective input and output members. One of the planetary gear sets has at least three different gearing diameters on its respective pinions and the input is a ring gear operatively engaged with the largest diameter gearing. Another planetary gear set is a range gear having an input sun gear and a plurality of pinions having a gearing which provides a speed reduction ratio greater than the highest speed reduction ratio of the previously mentioned planetary gear set.

Abstract: An improved transverse-mount type driving device for an automobile, having an output gear provided between last and intermediate planetary gear units of an auxiliary speed change gear assembly, the output gear meshing with a driven gear on a transmission shaft which extends parallel with the auxiliary speed change gear assembly and mounts a drive gear at an end proximate the torque converter for meshing engagement with a differential drive gear which in turn transmits power to right and left axle shafts.

Abstract: A timing control valve for use in the automatic transmission control apparatus for vehicles has a spring-backed spool which is actuated for movement to one position by the spring force or the spring force and the oil pressure to be applied to the brake B.sub.2 for causing a sun gear and a transmission gear case to be engaged by way of a one-way clutch, and is actuated for movement to the other side by a counteracting force provided by a line pressure and an oil pressure to be applied to the reverse clutch C.sub.2, whereby the timing control valve permits the brake B.sub.1 to be operated for directly connecting or disconnecting the sun gear and transmission case by controlling the timing of such operation of the brake B.sub.1 in response to changes in the throttle opening degree, and particularly permit a smooth downshifting without a one-way clutch.

Abstract: A control circuit for an automatic power transmission mechanism for use with an internal combustion engine in a vehicle driveline including fluid pressure operated clutches and brakes that are applied selectively to effect various ratio changes, a forward clutch being applied to effect a forward driving mode and being released to effect a neutral condition, and a clutch pressure regulator valve assembly for controlling distribution of actuating pressure to the forward clutch whereby the clutch pressure is regulated at a threshold value to effect minimum frictional engagement during coasting operation of the vehicle and during engine idling wherein provision is made for quickly increasing the pressure in the forward clutch to establish a maximum torque capacity when the coasting and idling mode is interrupted at the onset of driving torque delivery through the driveline thereby effecting a smooth transition from the coasting and idling condition to the driving mode.

Abstract: A selective driving mechanism includes an input shaft and two output shafts. The input shaft and the output shaft have profiled parts that can be engaged and disengaged with each other. A control member is movable between two selective positions in which only one or the other of the output shafts is drivingly engaged with the input shaft. The control member may be a sliding sleeve or a bell crank lever.

Abstract: A transmission for a laundry machine has at least two operating modes. The transmission includes input means selectively rotatable for oscillation in one operating mode and for unidirectional rotation in another operating mode. A pair of output means are operable for conjoint oscillation and unidirectional rotation with the input means, respectively. Means for transmitting the rotation of the input means to the output means includes means coupled with one of the output means for driving it, driven means associated with the input means for being driven by it, and means selectively operable for coupling the driven means with the other of the output means and with the output means for coupling the driven means and the driving means.

Abstract: A rotary transmission has an input shaft, an output shaft, two layshafts, two drive clutches and gear trains selectively engageable by dog clutches to transmit drive from the input shaft to the output shaft according to the state of engagement of the drive clutches and dog clutches. A transfer gear train and dog clutch is provided for drive between the layshafts, a further dog clutch being provided between one of the layshafts and the output shaft. The transmission provides six sequential speed ratios with pre-selection of adjacent ratios, alternate speed ratios being driven respectively through one and the other clutch.

Abstract: A continuously variable transmission of the expansible frusto-conical pulley type having fluid expansion chambers controlling expansion and contraction of the V-groove includes a fluid control circuit having a ratio control pressure regulator valve, a ratio relief valve connected across the ratio control regulator valve, providing for rapid down shift of the pulley combination while maintaining non-slip engagement between pulley discs and a flexible transmission band of trapezoidal cross section.

Abstract: In an altimetric compensation apparatus and method for a speed change pattern of an automatic transmission, first to third memory locations corresponding respectively to idling, low load and highload conditions of an engine are provided. A feedback air fuel ratio is calculated on the basis of feedback signals from an air fuel ratio sensor. A value in the memory corresponding to the detected running condition of the engine is compensated on the basis of deviation of the feedback air fuel ratio from the base air fuel ratio. When the values in at least two memory locations deviate by at least a predetermined value from the base value, the altimetric compensation value is adjusted and the speed change pattern is altered on the basis of the altimetric compensation value thus obtained.

Abstract: A power transmission for motor vehicles including two parallel mutually cooperative and inner acting power input drive trains connected between a motor vehicle power source and the vehicle drive shaft and a reversely directed torque compensating drive train operatively connected between the parallel power input drive trains, which transmission includes a first mechanical drive train which is connected to the motor vehicle power source and the vehicle drive shaft by differential torque transfer gearing which transmits torque in a reverse but parallel direction with respect to the drive shaft to a fluid torque converter having a turbine connected to a secondary hollow drive shaft.

Abstract: A power transmission having axially aligned input and output shafts is provided with a planetary gear train for each shaft respectively with the carriers for the planetary pinions interconnected, with the pinions all meshing with a common ring gear, and with a gear reduction from the input gear train to the output gear train. Power is applied to the transmission through a torque convertor, and initial high torque-low speed operation changes gradually until a one-to-one ratio is established.

Abstract: A gearing arrangement for a grinding apparatus, especially a bowl-type grinder or grinding mill, comprises a lower housing portion and an upper housing portion secured to the lower housing portion. At the upper housing portion there is rotatably mounted a support or mounting plate for a grinding bowl or receptacle. This support or mounting plate is mounted at the upper housing portion for rotational movement about a substantially vertical axis of rotation. The support or mounting plate is driven by angular gearing, for instance bevel gearing, and planetary gearing arranged in the lower housing portion. The planetary gearing contains an outer central gear which is arranged upon the lower housing portion as a part of the upper housing portion and is constructed as a support ring of an axial bearing for the support or mounting plate.

Abstract: In a traction roller transmission wherein a traction ring surrounds a sun roller with planetary traction rollers arranged in the space between, and in engagement with, the sun roller and the traction ring, a tapered ball screw structure is so associated with at least one of the sun roller and traction ring that a torque transmitted through the transmission causes the tapered ball screw structure to expand radially for forcing the planetary traction rollers into engagement with the traction ring and the sun roller.