Abstract: A door operator mechanism which has a motive power source and drive and a manual drive for use with a manual source of power. A mechanism is included which by the simple expedient of pulling a chain or cable disconnects the power source and associated driver and connects the manual drive for use of a manual source of power. Release of the cable causes the reverse.

Abstract: A marine drive for a boat includes a torque converter between the engine and propulsion unit. The torque converter has a slip condition in which a torque magnifying, fluid coupling is interposed between the engine and the propulsion unit. The slip of the torque converter enhances acceleration of the boat by permitting rapid increases in engine speed and power through relieving propeller loading of the engine. The torque converter has a lock-up condition in which the input and output shafts are directly and mechanically coupled together to provide highly efficient, sustained speed operation of the boat. A control operates the torque converter between the slip and lock-up conditions. This control may be obtained responsive to operating conditions in the engine or torque converter, such as engine speed, torque converter slip, throttle position, intake manifold vacuum, and engine ignition advance.

Abstract: A mechanism (19 or 200) disposed in a torque converter housing (24) for damping torsionals in a vehicle driveline. The mechanism (19) comprises a viscous coupling (22) including a housing (64) having two sidewalls (24a, 68) defining a chamber (70) containing a viscous liquid, and a clutch member (72) disposed in the chamber for viscous clutching coaction with the housing. One of the sidewalls (24a) is defined by an end wall of the torque converter housing. The housing and clutch member are interconnected by a spring assembly (20) including flat torsion springs (61, 62) which transmit steady-state driveline torque and isolate driveline torsionals. The inner surfaces (24b, 68a) of housing (64) each include two circumferentially spaced clutching surfaces separated by the clutch member. The clutch member has oppositely facing surfaces (72b, 72c) each which include two flat circumferentially spaced clutching surfaces.

Abstract: An electromotive control drive mechanism, in particular for industrial sewing machines, comprises a continuously drivable motor and a brake/clutch unit connected therewith. A clutch disk connected in a rotationally fixed manner with a driven shaft can, by axial movement and by overcoming a clutch air gap, be brought into frictional engagement with a clutch support which is connected in a rotationally fixed manner with the rotor of the motor. A brake disk connected in a rotationally fixed manner with the driven shaft can be brought into frictional engagement with a brake support which is rotationally fixed. A clutch coil and a brake coil are also provided. In order to reduce the expense of the brake/clutch unit without burdensome actuation noises arising, only one clutch/brake disk is provided, and mechanisms are provided for adjusting the clutch air gap and the automatic readjustment of the clutch air gap.

Abstract: Clutch operation signal issued in operational association with depression of a clutch pedal are taken as answer-back signals into an electronic control unit (ECU), a starter start command signal is issued in response to one of these answer-back signals. Additionally, a clutch upper switch and a clutch lower switch, which constitute a clutch sensor and are connected in series to each other, are inserted into a starter relay driving system, so that start due to mistaken operation and the like of ECU can be avoided.

Abstract: A temperature responsive fluid coupling device which can precisely control the transmitting torque between an input coupling member driven and an output coupling member in three steps in response to changes of ambient temperature of the output coupling member. The fluid coupling device includes two labyrinth operating chambers functioning as a torque transmitting mechanism, and each operating chamber includes a fluid return opening and a pumping mechanism.

Abstract: A control device for a vehicle brake system includes a proportioning valve assembly, an inertia sensing valve member and a hill holder valve member in a unitary housing. The inertia sensing valve member is operable in response to vehicle deceleration to control fluid communication via a bypass passage circumventing the proportioning valve assembly.

Abstract: A rapid-torque clutch/brake assembly has a hub secured to the driven shaft and connected to an axially displaceable ring by a pair of spring rings which flank interdigitating arms of the axially displaceable ring and the hub. An electromagnetic coil can be energized to selectively shift the axially displaceable ring into engagement with a clutch ring coupling the shaft to a driving element such as a pulley, or into engagement with a brake ring connected to a housing for braking rotation of the shaft.

Abstract: An installation for the control of a motor vehicle drive unit which includes a reciprocating piston engine, a hydraulically actuated clutch and a transmission. A drive pedal pick-up controls the throttle valve and therewith the engine torque by way of a first characteristic curve converter while it applies a signal by way of a second characteristic curve converter a to a control apparatus, to which is also fed at the same time the engine rotational speed n. The control apparatus forms the product a.multidot.n.sup.2 and applies the same as output signal to the electromagnetic actuating mechanism of the hydraulic clutch so that the pressure thereof and also the torque in the clutch is proportional to the product a.multidot.n.sup.2.

Abstract: A multiple speed drive unit that has a first input shaft driven by a motor, a plurality of secondary input shafts driven by the first input shaft, an output shaft, an oil shear brake for the output shaft, an oil shear clutch for each of the secondary input shafts adapted to be actuated to transmit rotational energy between a selected secondary input shaft and the output shaft, and a control for selectively engaging a selected clutch or brake.

Abstract: A clutch system which provides an automatic coupling between an engine and a driven mechanism comprises a fluid-type servomotor connected to the clutch unit. The servomotor fluid passes through a circulation system comprising a progressively variable orifice, the cross-sectional area of which depends both on the position of the accelerator pedal and on the position of the clutch. A branch pipe placed in parallel with the circulation system is closed by a device which opens when the measured engine speed exceeds a predetermined threshold value. The branch pipe is provided with a second variable orifice which has a larger opening than the first and operates under the same conditions in order to increase the speed of clutch engagement.

Abstract: In a clutch-and-brake unit for use with a continuously rotating, motor-driven shaft, for example in an industrial sewing machine, a single disk has a clutch surface on one side and a brake surface on the other side. The disk is magnetically urged into operative engagement with clutch and brake pressure plates facing the respective clutch and brake surfaces of the disk, the clutch pressure plate being rotated by the motor-driven shaft to rotate the disk and a shaft connected thereto when operatively engaged, and the brake pressure plate being non-rotatable to brake the shaft. The brake pressure plate is also constantly urged into light contact with the brake surface sufficient to brake the disk and shaft only when the disk is not operatively engaged with the clutch pressure plate. This prevents the disk and connected shaft from rotating when neither the clutch nor the brake are operatively engaged and eliminates engagement noise when the brake pressure plate is operatively engaged.

Abstract: In an electrically controlled shift actuator (110, 120, 130) and a control system (140) therefor of the type utilizing a cam or scotch yoke flywheel adapted to move a shift member (28, 96) to a preselected one of at least two spaced-apart shift positions. In one embodiment the shift member is in a preloaded condition provided by coiled spring (84) associated with the actuator. The control system employs a circuit having a control switch (100), a first switch (108), and a second switch (112) interconnectable in such a manner that a cam (70) responsive to the rotational position of the motor is able to change the condition of the first and second switching in a prescribed manner to move the shift member. The control system preferably includes energy dissipating resistor (120) for dynamically braking the motor and speed indicator (124) when the actuator is used as a shift actuator for a vehicle.

Abstract: A belt drive continuously-variable speed automatic transmission for motor vehicles, comprises a torque converter, forward/reverse rotation changeover mechanism, a belt drive continuously-variable speed transmission means and a differential gear disposed in a single housing in an integrated unit.The belt drive continuously-variable speed transmission means comprises a primary variable-pitch pulley mounted on the intermediate shaft, a secondary variable-pitch pulley mounted on an output shaft rotatably supported on the housing in parallel to the intermediate shaft and an endless belt interconnecting the primary and the secondary variable-pitch pulleys.

Abstract: An operation system for a hoisting device having a hydraulic motor for driving the hoisting device, a clutch mechanism for connecting and disconnecting the motor and the hoisting device cylinder, a foot pedal for applying a brake to the hoisting device by the control of an operator, and an automatic brake mechanism for applying an automatic brake to the hoisting device.

Abstract: A control for a clutch interconnecting the pump and turbine impellers in an automatic torque converter transmission for a vehicle having an auxiliary multistage gear train connected to the output side of the torque converter and a plurality of valve actuated hydraulic friction clutches for selectively actuating the gears of the gear train at a plurality of speeds including a high speed, a low speed and an intermediate speed just below the high speed and a throttle for controlling the speed of the engine connected to the input side of the torque converter, the interconnecting clutch control including a speed sensor, a speed detector, a throttle detector and an amplifier, the amplifier and friction clutch valves being connected to the interconnecting clutch control to selectively engage and disengage the clutch interconnecting the pump and turbine impellers in response to the actuation of the gears of the gear train, the sensed and detected speed of the vehicle and the detected throttle position.

Abstract: A transmission system for transmitting power from an engine to the driving wheels of a tractor. The system includes a multiple ratio mechanical range transmission coupled to a speed transmission via a manually operable master clutch. A high slip fluid coupling is used to couple the speed transmission to the engine. The coupling includes a lockup clutch engageable and disengageable under predetermined conditions and sequential order with other clutches.

Abstract: The transmission comprises a hydraulic power transmission device, a V-belt stepless shifter and a planetary gear train. At restart time when the vehicle is at rest with the V-belt stepless shifter in high gear, the hydraulic power transmission device is operated to shift for providing a relatively high torque ratio, rather than the V-belt stepless shifter. A smooth restart is thus made possible. In addition, the planetary gear train permits the shifter smoothly to switch between forward and reverse. Both features meet the transmission needs of all vehicles.

Abstract: A torque overload release clutch comprises an input, intermediate and output assemblies drivingly interconnected for rotation. A plurality of spline balls interconnects the input assembly with the intermediate assembly. A plurality of main balls disengagably, drivingly interconnects the intermediate assembly to the output assembly. Helical springs provide a reference force. When the axial force due to the applied torque exceeds the reference force, the main balls pivot and rotate so as to disengage the intermediate assembly from the output assembly by kicking the intermediate assembly axially. A latch comprising a dilating ring of balls can maintain the intermediate assembly in the disengaged position. Further, the latch balls can assume an intermediate position between the engaged and disengaged positions which facilitates resetting of the clutch.

Abstract: A valve actuator has an electric driving motor for driving an output shaft through reduction gearing and a manual operator for driving the output shaft manually. A drive transfer device for transferring the drive from the electric motor to the manual operating means incorporates an electric switch which is operated by the initial movement of a manual operator of the drive transfer device to cause the motor if rotating to be brought to a stop. Continued movement of the manual operator causes the drive transfer device to transfer the drive to the output shaft from the electric motor to the manual operator. The drive transfer device advantageously includes a clutch between the motor shaft and a worm shaft forming part of the reduction gear. The driven clutch member may form an integral part of a unit which is slidable as a sleeve along the worm shaft but is keyed for rotation to the worm shaft, the unit also having a pinion for meshing with a drive gear forming part of the hand drive.