Abstract: A seat belt retractor including a tension reducer which is compact in the axial and radial directions. The retractor includes a reducer spring that always biases a bush shaft, which rotates together with a spool, to rotate in the belt winding direction, and a main spring can selectively bias the spool in the belt winding direction. A lever of the bush shaft and a Geneva wheel form an assembly for memorizing the rotational amount of the spool in the belt winding direction relative to the ratchet gear when the main spring does not bias the spool in the belt winding direction. The assembly is arranged in the ratchet gear so that the retractor with the tension reducer is formed to be compact in the axial direction and the radial direction.

Abstract: An engine driven arc welder including a welding generator driven by an engine; output circuits for controlling the output of the welding generator in accordance with a control signal and for delivering the output to welding output terminals; a current detector for detecting the current flowing in the welding output terminals; an error detector for comparing the output of the current detector with a reference signal to detect error; a control signal producing circuit for producing the control signal in accordance with output of the error detector and for delivering it to the output circuit; and a voltage detector R10, VR10 for detecting voltage to be delivered to the welding output terminals, wherein the arc welder has a welding output characteristic having a constant current control arc characteristic in accordance with the reference signal and which exhibits a drooping characteristic in the vicinity of the arcing voltage and which is capable of increasing the current when the arc voltage is lowered.