Abstract: An external operation handle device for a circuit breaker includes a rotary handle equipped with a handle lock lever, a drive mechanism linking the rotary handle and the locker handle of the circuit breaker, and a door lock lever for interlocking between the rotary handle and a door of the board. By operating the rotary handle, the circuit breaker can be turned to an ON or OFF position, and the door is unlocked at an OPEN position. The handle lock lever is slidably disposed on the rotary handle to be anchored and held at a pulled out position in a condition where the rotary handle at the OPEN position unlocks the door of the board, and the door lock lever linked to the rotary handle is cramped and held at the unlock position in a condition where the rotary handle is at the OPEN position.

Abstract: An external operation handle device is used for a circuit breaker for switching a locker handle to ON and OFF positions. The handle device includes a main body casing for the circuit breaker, a mount base held on the main body casing, a rotary handle grip mounted on the mount base for turning the locker handle to the ON and OFF positions and having a connecting shaft, and an assist mechanism for moving the handle grip to a TRIP indication position upon tripping operation of the circuit breaker. The assist mechanism is interposed between the mount base and the handle grip, and includes a cam with a cam face, fixed on the mount base, a cam follower linking with the handle grip slidably along an axial direction and opposing the cam face of the cam, and an urging spring for pushing the cam follower against the cam face.

Abstract: An external operation handle device for a circuit breaker includes a rotary handle equipped with a handle lock lever, a drive mechanism linking the rotary handle and the locker handle of the circuit breaker, and a door lock lever for interlocking between the rotary handle and a door of the board. By operating the rotary handle, the circuit breaker can be turned to an ON or OFF position, and the door is unlocked at an OPEN position. The handle lock lever is slidably disposed on the rotary handle to be anchored and held at a pulled out position in a condition where the rotary handle at the OPEN position unlocks the door of the board, and the door lock lever linked to the rotary handle is cramped and held at the unlock position in a condition where the rotary handle is at the OPEN position.

Abstract: An external operation handle device is used for a circuit breaker for switching a locker handle to ON and OFF positions. The handle device includes a main body casing for the circuit breaker, a mount base held on the main body casing, a rotary handle grip mounted on the mount base for turning the locker handle to the ON and OFF positions and having a connecting shaft, and an assist mechanism for moving the handle grip to a TRIP indication position upon tripping operation of the circuit breaker. The assist mechanism is interposed between the mount base and the handle grip, and includes a cam with a cam face, fixed on the mount base, a cam follower linking with the handle grip slidably along an axial direction and opposing the cam face of the cam, and an urging spring for pushing the cam follower against the cam face.

Abstract: An antilock brake control for motor vehicles, wherein the actual wheel speed of each wheel of the vehicle is detected, and in dependency on the detected wheel speed, a reference vehicle speed is computed from which a reference wheel speed lower than the vehicle speed is determined, and wherein when the actual wheel speed decreases below the reference wheel speed as a result of braking operation, the braking hydraulic pressure acting on the wheel is decreased to allow the actual wheel speed to increase, and then the braking hydraulic pressure is reincreased when the actual wheel speed has recovered sufficiently. When a J-turn state of the vehicle is detected by lateral acceleration, the reference vehicle speed is changed to a lower value and a second reference wheel speed is determined on the basis of that lower value.

Abstract: A motor vehicle has an antilock brake system which is provided for preventing wheels from locking, and an automatic transmission of the vehicle has a one-way clutch for transmitting the output of an engine of the vehicle to wheels of the vehicle at acceleration of the engine, and a clutch for transmitting torque from the wheels to the engine, thereby effecting engine braking. A detector is provided for detecting operation of the antilock brake system and for producing a signal. In response to the signal, the clutch is released, thereby rendering the engine braking ineffective.

Abstract: In an antilock brake control for motor vehicles wherein a condition of locking of the wheels during braking is detected from the wheel speeds, and a control pattern of decreasing and reincreasing of the braking hydraulic pressure is repeated for carrying out effective braking operation, at least a phenomenon occurring in the vehicle in J-turn state is detected, and when the phenomenon exceeds a predetermined value, the antilock brake control is shifted from the normal mode to a J-turn mode in which different conditions are used. To detect the J-turn state, the difference in wheel speed between the right and left wheels is detected. Alternatively, lateral acceleration of the vehicle is also detected. Another alternative is a combination of the steering angle, the coefficient of friction between the wheels and the road surface, and the vehicle speed.