Abstract: A soft contact lens having a water content of 20 to 45% and a tensile strength of at least 500 g/mm.sup.2 can be produced by pouring into a mold a composition comprising 70 to 90% by weight of an alkylene glycol monomethacrylate, 0 to 2% by weight of a polyfunctional monomer as a crosslinking agent, 0 to 5% by weight of an unsaturated carboxylic acid containing at least one carboxyl group in its molecule, 2 to 25% by weight of a methacrylic acid ester and 0 to 10% by weight of a vinyl monomer such as vinyl acetate, effecting polymerization of the composition, processing the resulting polymer into a lens, and then hydrating and swelling the lens thus obtained.

Abstract: A method for determining the degree of the wear condition of a piston ring in sliding contact with a cylinder wall of an internal combustion engine. The piston ring has a defined magnetic property which property in sliding contact with the wall may be varied by a chromium plating. The reluctance of a magnetic field of an inductive sensor located in the cylinder wall is varied as the piston ring reciprocates and wears. The reluctance variation is compared with a predetermined reference level of the magnetic property for an acceptable degree of wear for the ring.

Abstract: An electro-magnet comprising a stationary system having a coil, a core and tationary flux-conductive yokes and with one part movable in longitudinal translation, comprising one permanent magnet whose magentizing axis is perpendicular to the moving direction of said movable part and two flux-conductive armatures secured to each pole face of said magnet in perpendicular relationship to said magnetizing axis, one of said flux-conductive armatures is so bent and/or shaped as to define, two air-gap regions arranged on either side of said magnetizing axis, whereas two yoke ends parallel to said magnetizing axis are placed in said air-gap regions.

Abstract: A hammer type ignition system for a firearm having a hammer pivoted about a pivot pin characterized by a floating cam also pivoted about said pivot pin and pivotally movable relative to the hammer, co-operable means on the hammer and cam limiting said relative pivotal movement therebetween, and a sear engaging surface on the cam releasably engageable by the sear of a firearm trigger.

Abstract: An angular position control apparatus for a machine tool circular table comprises a circuit for discriminating whether a command from a command register is such that the output from an absolute position detector for the table passes over the figure zero and an angular converter for converting a present or stopped position of the table detected by the position detector into an angular value. The output of the angular converter is compared with the command to drive the circular table. The resulting compared difference controls the clockwise or counterclockwise rotation of the table and table rotation in the neighborhood of the figure zero of the position detector is smoothed.

Abstract: A garden laid out on the roof of a building and having a sheet of vinyl spread on the slabbed floor of the roof and extending along the inner surfaces of the walls of the building up to a certain level above the slabbed floor, a space defined by the vinyl sheet covered slabbed floor and an upper concrete layer and filled with leaf mold, a garden earth layer formed on the upper concrete layer, and trees, shrubs, etc. planted in the garden earth layer.

Abstract: A rice pearling apparatus with a humidifier includes a humidifying section comprising a humidifying line open into an essential part of one of pearling chambers in a series of pearling units, and perforated walls for debranning-pearling cylinders provided in the pearling units before and after the humidifying section. The quotient of the total perforated wall surface area of the frictional pearling chambers after the humidifying section divided by the product of the pearling ratio multiplied by the rise flow rate is not less than one time as much as the quotient of the total perforated wall surface area of the frictional pearling chambers before the humidifying section divided by the same product as above.

Abstract: A machine tool having a plurality of independently and parallelly movable tool posts includes a system for preventing the interference between the tool posts, by means of that the information on the contour position of the tool post represented is added to the information on the position of a reference point set in for each tool post, and the results of addition are compared and calculated.

Abstract: A composition comprising a liquid polymerizable resin and an alloy of iron and silicon, known as ferrosilicon, for use as a metal repair or reclamation material. The invention also includes a two-component pack including the liquid polymerizable resin as one component and a catalyst or hardener therefor as the other component, ferrosilicon being present in one or both components.

Abstract: A socket comprises a pair of L shaped sheet metal members which interlock to form a square tube, the walls having surfaces which define at least one pair of bayonet slots, each having an entry limb and a retaining limb. The clothes drier standard has a bayonet pin extending outwardly in a transverse direction, and this can be accommodated diagonally in the square tube during insertion, and subsequently rotated to have its ends register with the entry limbs and be guided by the entry limbs into the retaining limbs of the two slots.

Abstract: Disclosed is an orifice plate for use in glass-fiber spinning having a number of densely arranged orifices. Each orifice has a larger diameter at the inlet side thereof facing the molten glass and a smaller diameter at the outlet side thereof facing the ambient air. The ratio of the larger diameter to the smaller diameter is so selected to fall within a range between 1 : 0.4 and 1 : 0.9. The reduced diameter of the orifices at their outlet side provides sufficiently large space between adjacent orifices at their outlet sides, in spite of the high density at which the orifices are arranged, so that the joining of glass cones suspended from respective orifices is conveniently avoided even after the brims of the orifices are ground by the viscous cooled molten glass.

Abstract: The clamp comprises an L-shaped fixed member and an L-shaped sliding member retained by a loop thereon to be slidable along the post portion of the fixed member. A clamping screw threadably engages the slide bar portion of the sliding member above the loop, and bears against the inner surface of the post.When the sliding member first engages a workpiece it tilts only slightly, and in an anticlockwise direction as illustrated in FIG. 1. Upon tightening of the clamping screw, the sliding member is tilted slightly but in a clockwise direction, correcting the initial tilt and maintaining the jaws substantially parallel.Since the clamping screw bears against the post with a greater pressure than the pressure applied to the workpiece, the clamp does not rely upon tilting to grip the post.

Abstract: Disclosed is an orifice plate for use in a bushing for spinning glass fibers having a number of orifices each of which consists of two cascaded coaxial cylindrical bores of different diameters, one of which opens in the upper surface of the orifice plate to constitute a molten-glass inlet-side bore, while the other opens in the lower surface of the orifice plate to constitute a molten-glass outlet-side bore.The orifices are so densely arranged as would allow joining of molten glass cones formed at adjacent orifices if a suitable countermeasure such as a cooling by air flow were not taken.

Abstract: A system for returning part of exhaust gases from an internal combustion engine through a return passage into an intake passage. Provided in the return passage are a fixed orifice, a pressure chamber downstream thereof, and a regulating valve downstream of the chamber. The regulating valve controls the pressure in the pressure chamber for a proper flow rate of exhaust gases being returned or recirculated. An opening of the regulating valve is so designed as to respond to the movement of a pilot valve provided separately.

Abstract: The anchor flukes are carried on a cross bar having spaced abutment plates which limit pivotal movement of a primary arm which is pivoted on the cross bar. A secondary arm also pivoted on the cross bar at one end does not have anything to limit pivotal movement and has the anchor cable secured at the other end. A pressure releasable latch interconnects the arms so that they release upon engagement of the anchor flukes with an obstruction when the boat is positioned above the anchor thereby allowing the anchor to be raised with its flukes trailing.

Abstract: A gasified liquid fuel burner having a combustion chamber in the form of a cylinder closed at the bottom, a hollow fuel gasifying member of a substantially conical shape located in the combustion chamber for rotation and having an open end formed therein with an obliquely outwardly turned portion, an air blast supply duct inserted in the fuel gasifying member, a fuel supply line for supplying a liquid fuel to the inner surface of the fuel gasifying member, a gas chamber formed in the combustion chamber in a manner to be juxtaposed against the open end of the fuel gasifying member to define a gasified fuel-air mixture ejection opening between the gas chamber and the obliquely outwardly turned portion of the fuel gasifying member, and a cylindrical gasified fuel-air mixing member provided in the gas chamber and spaced apart a small distance from the open end of the fuel gasifying member.

Abstract: A post has flanges with inturned beads which form a narrow mouth, the beads being engaged by a non-circular head on a screw such that rotation of the head in one direction releases its engagement from the beads, and the panel member or frame member to be assembled to the post has a nut contained within a nut receiving cavity, the nut threadably engaging the screw so as to firmly clamp the member to the post.

Abstract: A pressure-free type seat belt retractor wherein the wearer has a large "degree of freedom", i.e., permitting movement for a considerable distance beyond a "pressure-free point" without resetting so as to require retraction and subsequent withdrawal of the belt. A gate member, in the form of a disc is driven by a clutch from the retractor spool, is cooperable with a gate latch. The gate member has a cam surface which cooperates with a pawl so as to inhibit retraction after (1) withdrawal of the belt has caused the gate latch to engage the gate member and restrain its rotation; (2) initial retraction of the belt has released the latch from the member, and (3) further withdrawal has allowed the pawl to move to a retraction inhibiting position and establishing the "pressure-free point." The cam surface may again lift the pawl from the inhibiting position as belt withdrawal occurs, but upon subsequent retraction the pawl returns to the inhibiting position.