Abstract: An electromagnetic contactor to which voltage generated through full wave rectification of an alternating current or DC voltage is loaded. The device provides control for a closing operation with a large pulse width according to a set-up frequency and control for maintaining the closed state of the electromagnetic contactor with a small pulse width for executing ON/OFF control. The device comprises a detector for detecting a peak voltage value of the voltage subjected to full wave rectification and an average value or an effective value thereof and a controller for stabilizing the input at a constant level by controlling a pulse width of a frequency set up based on a voltage value detected by the detector.

Abstract: The present invention relates to a terminal connecting device which simplifies and facilitates achieving the proper alignment between a male-threaded portion of a terminal screw and a female-threaded hole of a stationary terminal, and moreover, which assures that a fastening operation is easily performed. The terminal connecting device includes a terminal screw guiding member adapted to be displaced along a side wall, the terminal screw being engaged with the terminal screw guiding member. The terminal screw or the terminal screw guiding member may also be supported by the resilient action of an elastic member of which one end is supported by the side wall. Alternatively, the terminal screws may be housed in a housing which is slidably attached to the side wall and which may be locked in place with the aid of a resilient member and latching apparatus.

Abstract: The present invention relates to a terminal connecting device which simplifies and facilitates achieving the proper alignment between a male-threaded portion of a terminal screw and a female-threaded hole of a stationary terminal, and moreover, which assures that a fastening operation is easily performed. The terminal connecting device includes a terminal screw guiding member adapted to be displaced along a side wall, the terminal screw being engaged with the terminal screw guiding member. The terminal screw or the terminal screw guiding member may also be supported by the resilient action of an elastic member of which one end is supported by the side wall. Alternatively, the terminal screws may be housed in a housing which is slidably attached to the side wall and which may be locked in place with the aid of a resilient member and latching apparatus.

Abstract: A switch which is superior in current limiting performance. The switch comprises a movable contact element having a pair of movable contacts secured thereto, a pair of fixed contacts individually secured to fixed contact elements for individually contacting with the movable contacts, an electromagnetic driving device including a movable iron core, and a first operating rod secured to the movable iron core. An electromagnet is disposed alongside the electromagnetic driving device and includes a movable iron core, and movement of the movable iron core of the electromagnet is transmitted to the movable contact element by way of a transmitting member and a second operating rod. The first and second operating rods are disposed for movement along a common axial line, and movement of the movable iron core of the electromagnetic driving device is transmitted from the first operating rod to the movable contact element either directly or by way of the second operating rod.