Abstract: An electro-chemical machine supplies pulses to a spaced workpiece and electrode in a working tank through an electrolyte in order to finish the workpiece, while eliminating electrolytic products produced in a gap between the workpiece and electrode by supplying clean electrolyte to the gap. This machine includes: an electrolyte filtering apparatus for removing dirty electrolyte containing electrolytic products from the working tank and filtering it; an electrolyte supplying apparatus for intermittently supplying the filtered electrolyte to the gap through a supply hole formed in the electrode; and a power supply apparatus for supplying the pulses to the workpiece and electrode when the flow of electrolyte to the gap stops. Clean electrolyte can be supplied to the gap almost simultaneously with the removal of dirty electrolyte, and then the finishing work is started. A glossy mirror surface on the workpiece can be automatically obtained by repeating those operations.

Abstract: A power supply system for an electrolytic processing apparatus which uses a discharge of pulses between a work and electrode including a discharge section having plural capacitors, rectifiers connected the capacitors so as to prevent reversing of current to the power source side, a plurality of discharge switches having an on-off function and connected to said capacitors, and a control section for turning the discharge switches on and off so as to control the discharge of charges from the capacitors to the work and electrode. A power supply section supplies a predetermined electric power for the capacitors, and a charging section selectively transfers power from the power supply section so as to charge the capacitors in a desired manner.

Abstract: A power supply system is provided for an electrolytic processing apparatus of the type which has an electrode positioned to oppose a work within an electrolyte and which processes and finishes the work by discharge of at least two modes of pulses of different current densities between the work and the electrode. The power supply system includes a plurality of capacitors capable of discharging charges so as to supply discharge pulses across the work and the electrode, a plurality of discharge swithches connected between the capacitors and the work and adapted to selectively cause the charges from the capacitors to be discharged; and a control section arrangement for selectively turning the discharge switches on and off in accordance with the current densities.

Abstract: An electrode is positioned with a predetermined gap between the electrode and a surface of a work in an electrolyte tank. Pulses are applied to the electrode. Electrolyte including residual products is discharged from the tank. Clean electrolyte is supplied to the electrolyte tank for next machining. After predetermined time, pulses for the next machining are applied to the electrode.

Abstract: A device for measuring moisture content in grains has a base supporting plate, a movable supporting plate pivotally mounted on the base supporting plate. A first roller electrode is rotatably mounted on the base supporting plate and a second roller electrode is rotatably mounted on the movable supporting plate adjacent the first roller electrode. A spring is provided between the base and movable supporting plates so as to press the second roller electrode against the first roller electrode.

Abstract: An electrode is positioned with a predetermined gap between the electrode and a surface of a work in an electrolyte tank. Pulses are intermittently applied to the electrode. Electrolyte including residual products is discharged from the tank. The discharged electrolyte is cleaned by a filtering device to produce clean electrolyte. The clean electrolyte is supplied to the electrolyte tank for next machining.

Abstract: A solenoid-operated pump for discharging fluid from a tank through a fluid discharge passage in a pump body has a directional control valve disposed in the fluid discharge passage. The directional control valve is normally urged to direct fluid flow through a fluid drainage passage branched from the fluid discharge passage and adapted for connection to the tank. The fluid drainage passage includes a restrictor which produces a fluid-pressure build-up in response to a change in viscosity of the fluid flowing therethrough, that is, when air is no longer contained in the fluid. The directional control valve is responsive to such pressure build-up to direct the fluid to flow through the fluid discharge passage.

Abstract: An oil combustion type infrared ray generating apparatus comprising a red heat cylindrical body fitted to the top wall of a frustoconical furnace body which together with a pressure oil jet burner provided with a blower are mounted side by side on the flat surface of the fuel tank.