Abstract: A split type card-edge connector including a pair of identical connector halves, each having contacts to be connected to corresponding terminals provided on opposite surfaces of a substrate, and securing members which secure the connector halves when the respective contacts are connected to the corresponding terminals of the substrate.

Abstract: A control system for a direct teaching/playback type robot, including a low spring constant member connected to a drive source for driving a robot element through a frictional coupling. The control system basically includes a first incremental position detector provided between the robot element and the frictional coupling for detecting the rotational position of the robot element, a second incremental position detector connected to the drive source for detecting the rotational position of the drive source, and a switch for selectively connecting the output terminals of the first and second position detectors to a drive source controller in teaching and playback modes of operation, respectively.

Abstract: Arm having a gravity-balancing function effective for use in welding robots as well as robots employed in a variety of industrial fields. Projectively provided over the fulcrum of an arm (1) is a rotary sheave (2), whose position is perpendicularly maintained regardless of the vertical swaying of the arm (1). A wire (6) is extended from an action point (A) on a line traced by the center of gravity of the arm (1), to the rotary sheave (2), and is connected to a spring mechanism (3) which may extend by the length of elongation equal to the distance between the action point (A) and the rotary sheave (2), whereby a moment due to the weight of the arm (1) is completely balanced to provide an arm with gravity-balancing.