Abstract: An electrical discharge machine including a lower support part (2) provided to a tilt shaft (4) rotatable and extending horizontally and an upper support part (3) provided to a forward/backward shaft (5) extending parallel to the tilt shaft (4) from a support column (42) provided vertically to the tilt shaft (4) and movable forward and backward in the extending direction. The lower support part (2) includes a lower guide roller (21) that rotates in a tilting plane in which the tilt shaft (4), the support column (42), and the forward/backward shaft (5) lie, the upper support part (5) includes an upper guide roller (31) that rotates in the tilting plane in which the tilt shaft (4), the support column (42), and the forward/backward shaft (5) lie, and a wire electrode (1) is suspended around the upper guide roller (31) and the lower guide roller (21).

Abstract: To provide an electrical discharge machine in which a wire electrode can be angled in the left-right direction (u direction) and the front-back direction (v direction), an electrical discharge machine according to an embodiment of the present invention includes a lower support part (2) provided to a tilt shaft (4) rotatable and extending horizontally and an upper support part (3) provided to a forward/backward shaft (5) extending parallel to the tilt shaft (4) from a support column (42) provided vertically to the tilt shaft (4) and movable forward and backward in the extending direction, in which the lower support part (2) includes a lower guide roller (21) that rotates in a tilting plane in which the tilt shaft (4), the support column (42), and the forward/backward shaft (5) lie, the upper support part (5) includes an upper guide roller (31) that rotates in the tilting plane in which the tilt shaft (4), the support column (42), and the forward/backward shaft (5) lie, and a wire electrode (1) is suspended aro

Abstract: A measuring apparatus for measuring the number and size of impurities such as dust and bacteria in super-pure water includes a sealed container; a sample supply line which sealingly interconnects a source of super-pure water with the sealed container and supplies a sample mixture of super-pure water and electrolyte to the sealed container; an overflow pipe which sealingly connects with the side of the sealed container; a negative electrode which extends into the sample mixture in the sealed container; a hollow sensor which extends into the sample mixture in the sealed container, the hollow sensor containing a positive electrode surrounded by electrolyte and having a small hole at its lower end; and a detecting circuit connected to said negative and positive electrodes for supplying a certain DC current therebetween and detecting voltage pulses caused by impurities passing through the small hole into the hollow sensor.

Abstract: A process for treating pollen which comprises freezing said pollen grains by immersing in low temperature liquefied gas so as to make them low temperature brittle, and pulverizing said pollen grains while they are still in the low temperature brittle state by means of a pulverizer of impact type, or further adding aqueous ethanol solution as the solvent to the pollen grains treated in the above manner, and after extracting the effective ingredients of said pollen grains at room to elevated temperatures with stirring, removing the residue and then concentrating the clear extract thus obtained under vacuum.