Abstract: A regeneration valve 131 is adapted for automatic activation of ion exchange resin in a water softener. The regeneration valve includes a switching valve 1, a control valve 32, a water injection valve 54, a cam mechanism (FIG. 13) and a timer mechanism which are compactly integrated in a single valve assembly. The timer mechanism includes a timer motor 80 provided with a switching gear adapted to be switched between 50 Hz and 60 Hz (FIGS. 16, 17). The ion exchange resin layer within the resin reservoir 2 can be uniformly activated so that the regeneration process can be achieved at a high efficiency.

Abstract: A portable power working machine has an L-shaped frame, a centrifugal blower fixed on a frame in a state that an intake port is opposed to a upright portion of the frame, and a cover having an upper portion spanned between an upper portion of the upright portion of the frame and the centrifugal blower and side portions extending from respective ends of the upper portion to a horizontal portion of the frame and spanned between a side portion of the upright portion and the centrifugal blower. A plurality of through-holes are formed in the upper portion of the cover, the through-holes communicating an interior space defined by the frame, the centrifugal blower and the cover with an exterior space on an outside of the interior space and having a size to block foreign matter in size greater than a predetermined value from passing through.

Abstract: A spark arrester is mounted in a tail pipe of an exhaust pipe of an engine, in particular a 2-strokecycle engine, and prevents sparks from being emitted. The spark arrester includes a sack-like member of a wire mesh and a cylindrical member secured to open end of the sack-like member. The cylindrical member received in the tail pipe is retained therein by a resilient retainer in a groove formed in the inner peripheral wall of the tail pipe.

Abstract: A multiple reciprocating pump such as a triple diaphragm or piston pump has a drive shaft (28), a plurality of reciprocating rods (48a, 48b, 48c) arranged in parallel with one another at one side of the drive shaft (28) and capable of reciprocating in accordance with rotation of the drive shaft (28); Displaceable members (56a, 56b, 56c) such as diaphragms or pistons secured to the ends of the reciprocating members (48a, 48b, 48c) and defining wall members of pump chambers (54a, 54b, 54c). The wall members (56a, 56b, 56c) are displaceable in accordance with the reciprocating movement of the reciprocating members (48a, 48b, 48c) so as to vary the volumes of the pump chambers (54a, 54b, 54c) thereby sucking in and discharging a liquid. The reciprocating members (48a, 48b; 48b, 48c) which are adjacent to each other in the direction of axis of the drive shaft (28) have different lengths.

Abstract: A connecting construction for a sidestay of a heald frame and a transverse beam having a sidestay of a heald frame, a transverse beam to be connected via an end face thereof with the sidestay, a concave engagement space defined in the end face of the transverse beam, a projecting portion formed integrally with the sidestay to be inserted into the concave engagement space and a securing device for pressingly securing a peripheral wall of the concave engagement space to the projecting portion in a longitudinal direction of the sidestay.

Abstract: A heald frame assembly comprising a plurality of heald frames which are provided with at least one guide plate which contacts with another guide plate on the heald frame adjacent the heald frame having the said one guide plate. The guide plates are so constructed as to make plastic to metal contact in this assembly.

Abstract: An apparatus for softening hard water, wherein a raw water pipe, a soft water pipe, a discharge pipe and a salt water pipe are connected with a cylindrical valve seat equipped on a softening tank accommodating ion-exchange resin to open into said tank, a rotary valve whose center hole slidingly fits on the upper end of a water pipe erected through the layer of said ion-exchange resin is rotatably installed in said cylindrical valve seat, said rotary valve is provided with a passage through which said raw water pipe, soft water pipe and discharge pipe can be separately connected with said water pipe and a passage through which said raw water pipe, discharge pipe and salt water pipe can be separately connected with said softening tank without recoursing to said water pipe, and through the rotation of sai rotary valve the combinations of (a) raw water pipe and soft water pipe, (b) raw water pipe and discharge pipe and (c) salt water pipe and discharge pipe can be alternately connected with the softening tank, wh