Abstract: An electric working machine according to one aspect of the present disclosure comprises a motor, a speed setting unit, a load detection unit, a determination unit, and a parameter setting unit. The determination unit calculates an estimated value of a heat generation amount of the motor, and determines that the motor is in an overload operation state when the estimated value reaches a predetermined threshold. The parameter setting unit sets a parameter to be used for calculating the estimated value and/or the threshold in accordance with a rotation speed set by the speed setting unit.

Abstract: There is provided a painter including (a) a static eraser which removes static electricity from air, (b) a tank containing a paint therein, (c) a spray gun which mixes the paint with air supplied from the static eraser, and sprays the paint to an object, and (d) a device located between the static eraser and the spray gun which device retains air therein. Positively or negatively charged ionized air supplied from the static eraser is retained in the device. In the device, the positively charged ionized air is mixed with the negatively charged ionized air, and resultingly, electrically neutral air is supplied from the device to the spray gun.

Abstract: In a magnetic random access memory circuit, the potential of all sense lines 121 to 124 are equalized, and the potential of all not-selected word lines 133, 135, 136 are equalized and the selected word line 134 is grounded so that a previously charged capacitor 114 is discharged by a current path passing from the capacitor 114 through a MOS transistor 118 maintaining the potential of the sense line 122 at a constant voltage lower than a break voltage, through the selected sense line 122, through the selected magneto-resistive element 142 and through the selected word line 134. Thus, a voltage applied to the magneto-resistive element is maintained at a level smaller than a voltage breaking the magneto-resistive elements or a voltage remarkably deteriorating the characteristics of the magneto-resistive elements because of a biasing effect when the tunnel magneto-resistive element is used, and on the other hand, a high precise and high speed reading can be realized.

Abstract: In a magnetic random access memory circuit, the potential of all sense lines 121 to 124 are equalized, and the potential of all not-selected word lines 133, 135, 136 are equalized and the selected word line 134 is grounded so that a previously charged capacitor 114 is discharged by a current path passing from the capacitor 114 through a MOS transistor 118 maintaining the potential of the sense line 122 at a constant voltage lower than a break voltage, through the selected sense line 122, through the selected magneto-resistive element 142 and through the selected word line 134. Thus, a voltage applied to the magneto-resistive element is maintained at a level smaller than a voltage breaking the magneto-resistive elements or a voltage remarkably deteriorating the characteristics of the magneto-resistive elements because of a biasing effect when the tunnel magneto-resistive element is used, and on the other hand, a high precise and high speed reading can be realized.

Abstract: A roll working apparatus for use in forming, pressing, punching, shearing, etc., comprising a pair of rolls on each surface of which a plurality of male or female impression portions having dissimilar form or configuration, a work-feeding means for selectively supplying a work to the working position of any one specific pair of the impression portions once per each rotation of the rolls, and a phase (or timing) adjusting means for the selective feeding of the work, in order to enjoy the merit of carrying out a desired process of production, without doing troublesome and time-consuming change of the rolls, only by adjusting the phase adjusting means and, if necessary, work-feeding means.