Abstract: A physically blended propylene polymer composition composed of(A) 100 parts by weight of crystalline polypropylene containing 0 to 10 mole % of ethylene and/or another .alpha.-olefin,(B) 1 to 30 parts by weight of a propylene/ethylene random copolymer composed of 30 to 85 mole % of propylene, said copolymer containing 0 to 10 mole % of a diene component and having (i) a micro-isotacticity of at least 0.8 and (ii) a boiling n-cyclohexane insolubles content of 0 to 10% by weight, and(C) 0 to 30 parts by weight of polyethylene containing 0 to 15 mole % of an .alpha.-olefin,said components (A) and (B) having been physically mixed with each other.

Abstract: A muffler for a motorcycle engine including a hollow, frustoconical muffler body, a hollow sound-absorbing member snugly fitted in the muffler body and maintained in intimate contact with the inner surface thereof, and a keep member for securing the sound-absorbing member in place. The sound-absorbing member is inserted in the muffler body and the keep member is inserted therein. The keep member is pressed into the hollow sound-absorbing member by a muffler core as the latter is inserted therein, to force the sound-absorbing member against the inner surface of the muffler body in intimate contact therewith. The muffler core includes a baffle tube extending axially of the muffler body, and a plurality of discal baffle plates secured to the baffle tube to define a plurality of chambers in the muffler body when fitted therein.

Abstract: A moving-coil type motor according to the present invention is composed of a hollow moving coil to which electrical energy is to be applied, a magnetic circuit member made of a material having high permeability which consists of an inner portion disposed within the hollow part of said moving coil and an outer portion disposed outside the same coil, said inner and outer portions being interconnected at their rear ends, and a magnet installed on said magnetic circuit member. The foregoing moving coil is fixed to an arm member supported to be capable of oscillating around a shaft, is curved into a circular arc centering around said shaft, and has a square-shaped cross section. The magnetic circuit member is also curved into a circular arc centering around the foregoing shaft similar to the moving coil, and the shape of the cross section of both the inner portion and the outer portion thereof is square similar to the shape of cross section of the moving coil.

Abstract: An angularly rotatable mirror apparatus including angularly rotatable mirror means and linear motor means. The angularly rotatable mirror means includes a mirror supported on a bracket and connected through an arm to the linear motor means for angularly rotating the mirror including a magnetic circuit consisting of a permanent magnet, a center pole an outer yoke, and a gap defined between the center pole and the outer yoke, and a movable coil arranged in the gap and connected to the arm. Means is provided for effecting control of the operation of the linear motor means in such a manner that a light flux reflected by the mirror will move at a constant speed on a surface to be scanned by the light flux.