Abstract: An air compressor comprises a cylinder, a suction valve body operatively combined with the cylinder, wherein the suction valve body is in a form of a band plate having a shape of V-letter with a round bottom, both ends of the suction valve body being arranged outside a projection space of the cylinder and a portion of the suction valve body other than the both ends being arranged inside the projection space of the cylinder, and wherein the air compressor comprises a suction valve plate receptor which can overlap the suction valve body when the suction valve body is in suction stroke and which has a rigidity enough to restrict an amount of lift of the suction valve body.

Abstract: A monoazo dyestuff composition comprising at least two different individual compounds of the formula ##STR1## wherein R.sup.1 and R.sup.2, independently of each other, are linear or branched alkyl having 1 to 4 carbon atoms and R is linear or branched alkyl having 1 to 5 carbon atoms, and where said individual compounds differ from each other in at least the R moiety. The monoazo dyestuff mixtures are used for the dyeing and printing of hydrophobic fibers such as high molecular weight polyesters of their mixtures with natural fiber material.

Abstract: An air compressor includes a crankcase, a cylinder secured to the crankcase, a crankshaft disposed inside the crankcase and adapted to be rotated by a drive means, a piston reciprocatively installed inside the cylinder, and a connecting rod for connecting the crankshaft to the piston. Part of the drive power circuit of the drive means is constructed so as to be cut off when displacement of the constituent members of the compressor other than predetermined displacement occurs and/or when the temperature inside the compressor rises above a predetermined value. Thus the passage of electric current to the drive means is cut off, the compressor being brought to a halt without causing secondary damage to develop.