Abstract: Porous materials of carbon can be manufactured by introducing particles of organic polymer in a vessel of an arbitrary shape, dissolving a particle surface layer to produce point bondings between the particles, thereby producing porous materials of organic polymer, then insolubilizng or infusibilizing it, and further calcining the particles in inert gas atmosphere, thereby obtaining the porous materials of carbon fundamentally as sintered particle materials. Thus, this process permits, essentially without difficult means of managing complicated steps such as impregnating or extracting, facilitated manufacture of porous materials of carbon having a large quantity of continuous pores with ready adjustments of porosity and diameters of the pores and high strength.

Abstract: A writing instrument with ink quantity or level detecting function which has an ink tube containing ink, and a float so arranged in intimate contact with the rear end surface of the ink in the ink tube as to be driven in contact with the rear end surface of the ink upon decrease of the ink in the ink tube. Further, a magnetic sensor is further provided externally at the writing instrument, while the float is formed of magnetic material. Thus, lack of the ink in the ink tube of this writing instrument can be readily detected.

Abstract: An improved process for producing hard carbonaceous sheets, which comprises uniformly dispersing as a viscous binder in fine carbon powder a mixture of relatively readily polymerizable thermosetting resins such as monomers, prepolymers or low polymers exhibiting high residual carbon yield after calcining; applying mechanical energy to the resultant mixture to induce mechanochemical phenomenon to produce molding paste composition in which said binder is uniformly rigidly bonded physicochemically to the surfaces of the primary particles of the fine powder, molding the composition by a fluid rolling method or a coating method in a film or sheet shape; infusibilizing the resultant molding; and calcining the resultant molding in an inert gas atmosphere. Thus, the hard carbonaceous sheets thus produced have small porosity, high mechanical strength, high elastic modulus, isotropy and uniform thickness of several microns to several mm using widely available and inexpensive manufacturing processes.

Abstract: A process for producing a carbon product having coarse and dense portions, the process including producing an integral porous carbon having high strength and uniform porosity distribution with dense structure carbon moldings. The carbon moldings are produced by calcining in an inert gas atmosphere a composite of (a) a green molding, a precarbonized material or a carbide and (b) chlorinated vinyl chloride resin particles, the chlorinated vinyl chloride resin producing, when carbonized in an inert gas atmosphere, a coarse structure. Dense carbon is formed by carbonizing the green molding, precarbonized material or carbide. Thus, the carbon product has coarse and dense portions.

Abstract: A process for producing a carbon heat generator is disclosed including the steps of uniformly dispersing one or more types of metal compounds capable of forming a vitreous film upon oxidation in a moldable composition, molding the resultant dispersed composition, precarbonizing the molded composition, and then carbonizing the composition in a nonoxidative atmosphere to form a carbon heat generator having an oxidation preventive glass film. The oxidation of the metal compound exposed on the surface of the molded composition by the use of an oxidative atmosphere forms a vitreous film which prevents oxygen from diffusing in the interior thereof. The film so produced can form a new glass film on a damaged portion by a self-recovery effect if a pinhole or a crack occurs in the glass film. Thus, the process does not cause external appearance and weight differences before and after heat generating.

Abstract: The present invention offers a device for fixing a writing or coating member in a writing or coating tool for a liquid composition, such as a writing brush, comprising a main body with a hole having an inner diameter smaller than the outer diameter of a plate portion provided at the rear end of the writing or coating member, a cutaway communicating from one side fringe of the main body to the hole with tapered side lines, a bow-shape leaf spring portion which is protruded from the fringe side opposite to the cutaway of the main body and lapped in such a manner that an intermediate portion approaches substantially in contact with the side face of the main body while its top end being maintained apart from the side face of the main body by a distance larger than the distance of a nearest approached portion, and 2 leg plates which are protruded from both the other fringes of the main body substantially vertically to the plane of the main body, and in the side opposite to the side where the leaf spring is located

Abstract: A process for producing a diaphragm for a speaker of carbonaceous materials which includes the steps of mixing carbon powder in a binder mainly containing chlorine-containing vinyl resin to be carbonized after calcining, applying high shearing force to a mixture composition obtained by uniformly mixing and dispersing the resultant mixture to sufficiently knead the mixture, then preliminarily molding the resultant mixture in a sheet shape, molding the preliminarily molded sheet into a diaphragm, insolubilizing, infusibilizing the diaphragm and calcining the diaphragm in an inert atmosphere, wherein the mixture composition contains at least 0.1 to 5 percentage by weight of 1.8-diazobicyclo (5, 4, 0) undecene-7 or that in which its salt is chlorine-containing vinyl chloride.

Abstract: In a liquid applicator provided with a fixing member for retaining a liquid-application member having a fixing flange at its rear end, the liquid-application member and the fixing member are assembled to form an assembly which is mounted inside a front shaft of the liquid applicator through a snap-in packing. Since the fixing member is provided with a resilient clipping-plate portion for compensating any variation of the thickness of the fixing flange of the liquid-application member, assembling of the assembly and the front shaft can be easily conducted in the liquid applicator.

Abstract: A liquid applicator composed of a stem cylinder body enclosing a liquid supply vessel, a knocking member at the rear end and a brush part at the top of the outer stem.The liquid supply vessel is composed of a pressure-tight container having a specific quantitative valve and containing a pressurized liquid which contains a raw liquid and an ejecting agent.An adapter is interposed betwen an ejecting nozzle of a valve in the liquid supply vessel and the brush part. The liquid is leaked from the brush part by a knocking on the knocking member.

Abstract: A writing instrument or an applicator of the invention is constructed of: a shaft sleeve main body having an application liquid reservoir therein; and an application member provided in a front end of the shaft sleeve main body to receive a liquid supplied from the liquid reservoir. The shaft sleeve main body comprises: an ink conduit member provided with a large-diameter piston portion, and a rod element which projects forward from the piston portion and is smaller in diameter than the piston portion while provided with a communication-hole; a cylinder member for slidably receiving the ink conduit member means for moving the cylinder member along the axial line of the shaft sleeve main body; means for biasing both the cylinder member and the ink conduit member so as to be separated from each other; and a hole for the application member, connected to a front end portion of said ink conduit member, which front end portion projects from the cylinder member.

Abstract: A method of manufacturing the writing tip of a ball point pen which has the steps of inwardly pressing the end of a fine metallic tube at the entire periphery to form a drawn portion, drawing the inner wall of the drawn portion to form a ball holding portion, forming a slot for leading ink at the ball seat portion, inserting the ball into the ball holding portion, and allowing the ball to be held at the ball holding portion. Thus, the durability of the tube can be improved, and the design of the supply passage of ink can be freely performed without restriction in the diameter of the ball.

Abstract: An injector such as a hypodermic syringe and the like is improved in that an amount of injection each time thereof is mechanically determined by provisions of a stopper disconnectably attached to the barrel of the plunger and a plurality of convex/concave portions provided integrally on the outer surface of the plunger and cooperating with the stopper so that the stopper acts as a limiter for an advancing movement of the plunger in the cylinder of the injector to determine the amount of each injection of the injector.

Abstract: An injector such as a hypodermic syringe and the like is improved in that an amount of injection each time thereof is mechanically determined by a provision of a stopper means disconnectably attached to a plunger of the injector, which stopper means and the plunger are engaged with each other through a projection-recess engagement thereof, in which engagement the stopper means acts also as a wedge-like means inserted between the plunger and a barrel of the injector to make it possible that the stopper means abutting against a rear end of the barrel at a time when the injection operation is completed prevents the plunger from being advanced beyond it predetermined position, under the effect of its wedge action.

Abstract: A carbon spring composed substantially of carbonaceous carbon or graphite carbon is prepared by shaping an organic linear material to a coiled spring and thereafter heating it to carbonize.

Abstract: A method of fabricating an eraser which contains a main basic material of low crystallizable polyolefin thermoplastic elastomer and normal synthetic rubbers having no hard segment for performing a crosslinking effect, namely, any one or more of chlorinated polyethylene, ethylene-propylene terpolymer, ethylene ethyl acrylate, ethylene-vinyl acetate copolymer, atactic polypropylene, styrene-butadiene rubber, nitrile rubber and the like. The thermoplastic elastomer exhibits similar properties to vulcanized rubber without particular vulcanizing operation and crosslinking reaction. In case that less than 40 parts by weight of the elastomer is contained in the eraser, the composition does not form an eraser, while in case that higher than 100 parts by weight of the elastomer is contained in the eraser, the composition incorporates excessive rubber-like properties.

Abstract: A knock-out type mechanical pencil has a supporting rod mounted with an eraser at its rear end and axially slidably engaged within the interior of a cylindrical knock-button. A tubularly cylindrical weight is axially slidably engaged around the supporting rod. A cylindrical magnet is axially magnetized and secured to the inner peripheral surface of the knock-button. An annularly inwardly raised guide portion is formed on the inner peripheral surface of the knock-button for guiding the weight to the axial line of the knock-button when the weight is axially slidably dropped downwardly toward the writing tip of the pencil. To protrude and fix an eraser from the rear end of the tubular cylindrical body, the rear end of the pencil is tilted downward. To automatically contain or retract the eraser in the knock-button, the writing tip of the pencil is directed downwardly in writing state.

Abstract: A construction type educational and amusement device having as its basic element a generally spherical hollow module or capsule and adjuncts which may be interconnected and operatively assembled into a large number of different relations to form power-driven vehicles, cranes, propeller-driven floats, air propelled devices and many other assemblies of scientific interest. The capsules of a complete assembly may contain, respectively, an electric motor, gearing of various kinds and types, to form operative simulations. The modules are preferably of clear plastic so that operation may be observed and understood.