Abstract: A safety device for use with vehicles is disclosed for forcing the wearing of seatbelts by both a driver and a passenger which may eliminate the unpleasant situation that passengers seat sensors, passenger seatbelt switch and its associated alarm operate separately or independently of the presence or absence of a driver sitting on a driver sheet.

Abstract: A safety device for use with vehicles is disclosed for forcing the wearing of seatbelts by both a driver and a passenger which may eliminate the unpleasant situation that passengers seat sensors, passenger seatbelt switch and its associated alarm operate separately or independently of the presence or absence of a driver sitting on a driver sheet.

Abstract: A simple but improved seatbelt safety device is provided for preventing vehicles from starting an engine by an engine key without drivers or passengers wearing seatbelts. The seatbelt safety device for a vehicle is placed in an electric circuit for energizing an engine for the vehicle, via an engine starter key for starting the engine. The electric circuit includes a built-in ON/OFF switch seat buckle detector, an occupant's seating detecting ON/OFF switch or sensor in parallel, thereby enabling the engine starter key to start the engine only when an occupant is seated and the seatbelt is fastened.

Abstract: In a process for producing a stabilized oxymethylene copolymer by heat-melting, at a temperature ranging between the melting point of the copolymer and a temperature 100.degree. C.

Abstract: A process for producing a polyacetal homopolymer or copolymer which comprises continuously feeding a liquid starting mixture containing molten trioxane and a catalyst and optionally a comonomer through a feed opening of a reactor, said reactor being a continuously stirring-type mixer having two stirring shafts having a plurality of plate-like paddles fixed thereto the cross-section of each of said paddles taken perpendicularly of the axial direction of the stirring shaft having a shape of a convex lens, an ellipse or a quasipolygon inscribing a phantom circle at each vertex, one of said paddles facing another paddle fixed to the other stirring shaft and said one paddle being positioned such that it rotates while the edges thereof keep a slight clearance from the inner surface of the barrel and the other paddle; polymerizing the starting mixture while moving it toward the discharge opening by the rotation of the paddles, the improvement wherein the profiles of the paddles are changed, or the arrangement of the

Abstract: A stabilized oxymethylene copolymer composition comprising an oxymethylene copolymer, and incorporated therein,(1) at least one amine-substituted triazine of the following formula ##STR1## wherein R.sub.1, R.sub.2 and R.sub.3 are a hydrogen atom, a halogen atom, a hydroxyl group, an alkyl group, an alkoxy group, an aryl group, a hydrogenated aryl group, an amino group or a substituted amino group, and at least one of them is an amino group or a substituted amino group,(2) at least one sterically hindered phenol of the following formula ##STR2## wherein R.sub.4 and R.sub.5 are an alkyl group, a substituted alkyl group or a substituted triazole group and R.sub.

Abstract: In a process for producing an oxymethylene homopolymer or copolymer having improved stability which comprises polymerizing trioxane or a mixture of trioxane and a cyclic ether and/or a cyclic acetal in bulk in the presence of a catalyst which is at least one compound selected from the group consisting of boron trifluoride, boron trifluoride hydrate and coordination compounds of boron trifluoride with organic compounds containing an oxygen or sulfur atom, the improvement which comprises performing the bulk polymerization without destroying the bulk polymerization system, or which comprises adding a tertiary phosphine compound to the polymerization system to deactivate the catalyst, before the polymerization system formed by the bulk polymerization is destroyed.

Abstract: In a process for producing a stabilized oxymethylene copolymer which comprises heat-melting an oxymethylene copolymer having unstable, unblocked terminals obtained by the copolymerization of trioxane with a cyclic acetal and/or a cyclic ether to heat decompose it in the presence of available heat stabilizers; the improvement which comprises heating said oxymethylene copolymer having unblocked terminals in a mixer at a temperature between the melting point of said oxymethylene copolymer and a point 100.degree. C. higher than said melting point under a pressure of 0.

Abstract: An oxygen absorbent comprising (a) metal halide-coated metal powder having at least one metal halide coated on the surface of at least one metal powder, the amount of metal halide coated being in the range of from about 0.001 part to about 10 parts by weight per 100 parts by weight of the metal powder, and the water content of the metal halide-coated metal powder being less than 1% by weight on the basis of total weight of the metal halide-coated metal powder an (b) a water-containing material and a process for producing the same are disclosed.

Abstract: A process for polymerizing trioxane made from an aqueous solution of methanol-containing formaldehyde by a conventional method or copolymerizing the trioxane with another monomer, characterized bycooling the trioxane to crystallize it,allowing the trioxane in a crystalline state to stand in an open system in an atmosphere of air or an inert gas to remove polyoxymethylene dimethoxide from the trioxane,melting the trioxane, andpolymerizing the trioxane or copolymerizing the trioxane and the another monomer.

Abstract: An oxygen absorbent comprising a metal powder and a metal halide coated thereon is disclosed.

Abstract: An oxygen absorbent comprising at least one alkaline earth metal sulfite, at least one ferrous compound and free water is disclosed.

Abstract: An oxygen absorbent comprising a dithionite and at least one compound having water of crystallization or water of hydration is disclosed.

Abstract: A process for treating a waste liquor from a hydrosulfite process by an activated sludge process is improved by aerating the waste in the presence of a metal ion before the activated sludge process.