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Document Title |
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7583036 |
Electrically driven vehicle
In an electrically driven vehicle having a controller, the vehicle has a steering angle sensor for outputting a detected value of a steering angle of the vehicle, the controller includes a first...
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7205730 |
Article transport vehicle
The invention provides an article transport vehicle that includes: a vehicle body; a first wheel that supports the vehicle body; a second wheel that is disposed spaced apart from the first wheel in...
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7026780 |
Method for stabilizing the movement of an articulated chain of a chain block, especially to prevent the formation of a resonance oscillation of the chain, and a chain block apparatus
The invention concerns a method for stabilizing the motion of an articulated chain of a chain block, especially to prevent the formation of resonance oscillation of the chain, in which an...
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6759818 |
Electromotive actuator and method for controlling the same
To realize structure simplification and reduction in manufacturing cost without lowering power transmission efficiency and reliability. The present invention includes a first motor 5 and a second...
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6680589 |
Relay contact monitoring device
A device for monitoring the state of relay contacts is especially useful for controlling motor windings in air conditioning systems. When a first relay switch, which is operative to supply power to...
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6583590 |
String drawing device for a racquet
A string drawing electrical device for a racquet has a casing, a string holder, an actuating device and a control unit. The string holder is rotatably attached to a panel of the casing. The...
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6300732 |
Dual power unit for movement of a back and footrest in armchairs and the like
The dual power unit includes an elongate housing having mounted therein adjacent opposite ends thereof two power units, one of which is drivingly connected to the movable back of an armchair, and...
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6208096 |
Optimized winding drive
In a tape transport for recording and/or reproducing signals by means of a recording medium using separate winding motors for driving the winding plates, the drive of the winding motors servo units...
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5936312 |
Power output apparatus and method of controlling the same
The object of the present invention is to carry out control and enable an engine to output a desired power, thereby preventing unexpected charge or discharge of storage battery means. A power...
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5701066 |
Control system for an induction motor
A control system for an induction motor of the present invention independently commands the torque current component and the exciting current component of a stator current group supplied to the...
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5606235 |
Industrial robot with integrated reduction gear units
An industrial robot is provided with a plurality of elements articulated to each other, whose rotation is driven by respective electric motors by reduction gear units which are integrated in the...
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5537011 |
Method and apparatus for promoting even wear in a multiple-motor drivetrain
An invention is disclosed which promotes even wear within a multiple-motor drivetrain. In one embodiment of the invention, a vehicle drivetrain includes two motors. The total torque to be provided...
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5493185 |
Method for animating motor-driven puppets and the like and apparatus implementing the method
A method and apparatus for animating motor-driven puppets includes drive units for individual parts or segments of the puppets, a manual input control system for controlling the drive units and...
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5374879 |
Omni-directional and holonomic rolling platform with decoupled rotational and translational degrees of freedom
A wheel assembly includes a support, a cage rotatably mounted on the support and having a longitudinal rotation axis, a first ball wheel rotatably mounted in the cage and having a rotation axis...
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5331266 |
Cooperative differential drive system
A cooperative differential drive system (20) for use in material handling and flight control and guidance systems, and the like. The drive system (20) may be employed in application that require...
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5134346 |
Apparatus for driving a spindle of an electroerosive machine
The driving apparatus for the rotation of the spindle or the work piece pallet of an electroerosive machining device comprises two electric motors which drive e.g. the spindle to a rotational...
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5019755 |
Electric motor drive system
An electric motor drive system having a first electric motor, a first drive shaft to which the first electric motor is coupled, a second electric motor having a higher power rating than the first,...
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4885698 |
Overload prevention apparatus for jacking system of offshore structures
An overload prevention apparatus for a jacking system of a rack and pinion type for use in offshore structures is disclosed. Each of the pinions is provided with a torque meter and tachometer for...
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4760314 |
Rotation controller for a differential actuator
A rotation control apparatus for a differential actuator includes two induction motors and a differential mechanism for producing a constant torque on its output shaft based on the differential...
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4591772 |
Load positioning system with gravity compensation
A load positioning system with gravity compensation has a servo-motor (12), position sensing feedback potentiometer (38) and velocity sensing tachometer (42) in a conventional closed-loop servo...
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4525655 |
Two stage electric drive
An electric motor drive system having a first direct current electric motor, a first drive shaft to which the first electric motor is coupled, a second direct current electric motor having a higher...
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4424473 |
Drive apparatus for an industrial robot
An industrial robot is disclosed, which utilizes three like drive units for controlling movement about the three primary axes of rotation. Each drive unit comprises a pair of electrical stepping...
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4289996 |
Actuators
A powered linear actuator is provided primarily for releasing stores from aircraft, having dual closed loop servo motor systems driving a screw jack. The dual motors, which have samarium cobalt...
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4173029 |
Protective circuit for selectively applying power to a motor
A protective circuit is described for selectively applying power to a motor. The circuit includes a power switch which closes and opens to apply and remove power from the motor, and a control for...
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RE30091 |
Automatically guiding workpieces through a machine
Automatic guiding apparatus has first and second drive wheels which are driven from a common source for effecting feeding of a workpiece in a straight line through a machine. For effecting steering...
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4103210 |
Draw twisting machine
A draw twisting machine is provided with a plurality of synchronous motors which drive respective draw rollers. The synchronous motors are supplied with electrical power from an A.C. generator...
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4093896 |
Speed control for rotatable element driven by direct current motors
Disclosed herein is a control comprising a rotatably supported wheel, a first direct current motor, means drivingly connecting the first direct current motor to the wheel with a first drive ratio,...
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4087731 |
Control system for moving a large machine along a single axis
A control system for moving a large machine along a single axis. The control system includes first and second position loop servo systems to drive at least respective first and second motors to...
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4035705 |
Fail-safe dual channel automatic pilot with maneuver limiting
Two substantially identical servo channels, coupled through a differential mechanism, position an attitude control surface of an aircraft in response to a common command signal applied to both...
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3940677 |
Direct-current stepping motor drive system
A motor drive system including a direct-current motor arranged in tandem with a stepping motor. The stepping motor is energized by conventional means. The direct-current motor is energized by a...
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3925713 |
Automatically guiding workpieces through a machine
Automatic guiding apparatus has first and second drive wheels which are driven from a common source for effecting feeding of a workpiece in a straight line through a machine. For effecting steering...
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3911336 |
Plural motor drive including a servo motor control system
The present invention relates to a servo motor control system in which an electric motor is instantaneously energized by movement of a relatively weak servo motor of the type normally actuated by...
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3833847 |
ANTI-BACKLASH SERVOMOTOR DRIVE SYSTEM
A two servomotor drive system wherein the servomotors generate (1) opposing torques at or near standstill to take up backlash in a rack and pinion drive, and (2) additive torques at other...
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3832610 |
PULSE OPERATED SURFACE MOTOR
A pulse operated electromagnetic drive system along a plane is referred to, as a pulse operated surface motor in the present disclosure. The pulse operated motor is comprised of a plane-like...
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3817367 |
HIGH SPEED PRINTER
A high speed printer having a disc type matrix that is adapted to be rotatably driven to a plurality of selected print positions by means of a differential unit that includes two separate input...
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3799284 |
DRIVE SYSTEMS
A versatile drive system suitable for battery powered electric vehicles or other machinery employs two electric motors driving a respective rotatable element, such as a road wheel, or together...
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3783355 |
PLURAL MOTOR DIFFERENTIAL CONTROL MECHANISM
Mechanism for controlling the rate of movement of a movable body by resolving mechanically the difference between the actual rate of movement of the body and the desired rate of movement as...
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3771032 |
PLURAL ELECTRIC MOTOR CONTROL SYSTEMS
An electric motor control system, in which: two coacting electric motors, each having a rotatable armature and rotatable casing and field assemblies, are arranged to afford infinitely-variable...
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3757192 |
PLURAL STEPPING MOTOR NUMERICAL FEED CONTROL DEVICE
A numerical feed control device is disclosed in which a worktable is driven by a pair of pulse motors, each of which moves a different distance when actuated by a driving pulse. The two motors are...
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3697763 |
ADJUSTABLE SPEED ELECTRIC POWER MEANS AND SYSTEM
Electrical power means and system in which at least two D.C. dynamo-electric machines are electrically connected and mechanically drivingly connected through differential gearing with a common...
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3626261 |
PORTABLE MULTIRATE ELECTRIC IMPULSE GENERATOR EMPLOYING A PLURAL MOTOR DIFFERENTIAL GEAR DRIVE
A portable electric impulse generator is provided having an impulse triggering reed switch that is actuated by a rotatable magnet which, in turn, is driven at various preselected rates of speed by...
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3621314 |
REVERSIBLE OPERATING APPARATUS
A reversible, variable-speed motor mechanism comprises a pair of two-phase induction motors rotating in opposite directions. The motors are coupled to a load by a pair of eddy-current coupling...
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3593094 |
AUTOMATIC LEVEL ADJUSTING MEANS FOR SUSTAINING THE CROSSRAIL USED IN DOUBLE HOUSING TYPE MACHINE TOOLS IN ITS ACCURATE HORIZONTAL POSITION
In a large-sized double housing type machine tool, an automatic level adjusting means for sustaining the crossrail in its accurate horizontal position is provided; said means comprises a pair of...
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3593092 |
MULTIPLE OUTPUT MULTIPLEX ACTUATOR
Four servomotors are coupled together in a velocity-summing arrangement to produce two output motions. These two output motions are combined in a linkage arrangement that results in a single...
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3575647 |
PLURAL MOTOR SERVO DRIVE SYSTEM INCLUDING MECHANICAL DIFFERENTIAL SUMMATION AND TORQUE COMPENSATION
The disclosed embodiment of this invention is a servosystem for controlling the rotational position of a pair of anamorphic lenses in a perspective alteration optical system. A first servomechanism...
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3575621 |
DRIVE MEANS FOR APPLIANCE CONTROL MEANS
At least two motor drive means drives a control means for an appliance, each of the motor drive means including a speed reducing means coupled to a common output means which in turn is coupled to...
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3550716 |
AUTOMOBILE SPEED-CONTROLLING MECHANISM
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3539887 |
INFINITELY VARIABLE REVERSIBLE ALTERNATING CURRENT DRIVE
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3538413 |
STEPPED DRIVEN DIFFERENTIALLY GEARED MOTOR SYSTEM
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3535607 |
POSITION SERVO INCLUDING A DIFFERENTIAL GEAR DRIVING A PHOTOELECTRIC SHUTTER AS AN ERROR DETECTOR
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