Abstract: A position indicating circuit includes: first and second input terminals for respectively receiving first and second voltages; an output terminal; a first resistor; and a second resistor having a first terminal coupled to the first input terminal through the first resistor, a second terminal coupled to the second input terminal, and a third terminal coupled to the output terminal. The second resistor is used to be actuated by a pedal of a foot controller of a sewing machine such that a voltage at the output terminal has a magnitude related to a position of the pedal. A detecting system that uses the position indicating circuit and that can determine whether the foot controller is coupled to a main body of the sewing machine is also provided.

Abstract: A drive assembly with selective disconnect includes a motor with a motor drive shaft; a harmonic drive coupled to one end of the motor drive shaft; an output shaft coupled to the harmonic drive; and a retracting mechanism that selectively retracts the motor drive shaft axially to decouple the motor drive shaft from the harmonic drive.

Abstract: A wave generator of a hollow strain wave gearing has a rigid plug and a needle roller bearing. The needle roller bearing has an inner ring trajectory surface formed in the plug external peripheral surface, a flexible outer ring, an outer ring trajectory surface formed in an inner peripheral surface of the outer ring, and needle rollers. An inner ring trajectory groove is formed in the plug external peripheral surface, and the inner ring trajectory surface is formed in a groove bottom surface of the inner ring trajectory groove. Inner-ring-side restricting surfaces for restricting the needle rollers from moving in the center axis direction are formed in groove side surfaces on both sides of the inner ring trajectory groove. A wave generator can be obtained, which is suitable for increasing the hollow diameter of a strain wave gearing.

Abstract: A control object can be stopped at a target position with high precision by decelerating braking performed by decreasing a control speed of a speed controller and by decelerating braking performed by braking operation of a brake device. A positioning apparatus includes a rotation detecting sensor S coupled to a rotary shaft for rotating or rectilinearly driving a control object. A normal-reverse rotation discriminating circuit DD for discriminating normal rotation of the rotary shaft from reverse rotation thereof. A first decelerating position memory B1 for holding at least one decelerating position where low-speed driving operation is to be started, and second decelerating position memory B2 for holding at least one decelerating position where braking operation is to be started. First and second decelerating position comparators CP1 and CP2 for comparing counted values with first and second decelerating positions in the first and second decelerating position memories B1 and B2.

Abstract: An electrically-driven thrust generator is provided, which can contribute energy saving, and has properties (thrust controllability, swift action etc.) equivalent to hydraulic cylinders and contributes to solve problems (leakage etc.) associated with oil pipings. The electrically-driven thrust generator comprises a motor 3, a variable reduction ratio speed reducers 5, a rotary motion to linear motion converting mechanism 7, a thrust rod 121 linearly driven by this rotary motion to linear motion converting mechanism 7. The present invention is characterized in that the rotary motion to linear motion converting mechanism 7 comprises an oscillating crank plate driven rack mechanism, which provides a compact and powerful electrically-driven thrust generator equivalent to hydraulic thrust generator.

Abstract: In apparatus for controlling a rapid feed speed of a movable body, for example a table of a machine tool, by using a ball screw, there are provided a converting device for converting the rotation of the ball screw into a force for reciprocating the table, a position detector which judges whether a nut of the ball screw is at an end of the movement of the nut or at a central portion of the movement for issuing a detection signal and a speed reducing device which reduces the number of revolutions of the ball screw when the detection signal is issued.

Abstract: A brake activated accelerator override apparatus for an engine having a throttle plate pivotal between closed and open positions. First and second throttle levers are connected to the throttle plate. The first throttle lever is connected to the accelerator linkage for pivoting the throttle plate to an open position. A coupling spring is connected between the first and second throttle levers to jointly pivot the first and second throttle levers to the open position upon movement of the accelerator linkage and to permit independent movement of the second throttle lever to the closed position. A sensor detects actuation of the vehicle brakes and energizes an actuator connected to the second throttle lever to pivot the second throttle lever and the attached throttle plate to the closed position, independent of the first throttle lever. Preferably, the actuator is an electromechanical solenoid having an extensible plunger which is connected by a link to the second throttle lever.

Abstract: In a motor driven automotive cruise control system, the engine throttle is progressively released upon actuation of the vehicle service brakes to avoid objectionable pedal slap noise. The release is initiated by the electric motor, which drives the engine throttle toward its closed (rest) position while maintaining engagement of a clutch connected therebetween. If the duration of the brake actuation exceeds a reference interval sufficiently long as to indicate potentially significant braking effort, the clutch is immediately disengaged to return the throttle to its closed position without further delay. If the duration of the brake actuation is less than the reference interval, engagement of the clutch is maintained until the motor has returned the throttle to its closed position.

Abstract: The drive comprises an air-operated driving unit imparting either a linear or a rotary motion to the working member of a manipulator and, at the same time, driving the rotor of an electromagnetic brake in accordance with displacement of the working member. For linear movement of the working member, the driving unit comprises an air-operated piston-cylinder actuator and, for rotary movement of the working member, comprises a vane-type air motor. An electronic control system controls the operation of the driving unit and of the electromagnetic brake, and thus the motion of the working member.

Abstract: The invention relates to a device for driving a transfer beam for handling relatively heavy loads, comprising in the case of a beam having a rack rigidly associated therewith. Said device consists essentially of a transmission incorporating between the driving motor and the pinion in meshing engagement with the rack a clutch and a brake both controlled by electromagnetic means, servo means for supplying electric current to each electromagnetic control of said clutch and brake, and a pair of servo-generators adapted to monitor the one the acceleration phase of the transfer beam from the standstill position of said beam and the other the deceleration phase before stopping the beam.