Abstract: To improve ignition timing precision without being subjected to a harmful influence of gear backlash produced when the distributor unit is directly driven by a camshaft and further to mount the distributor unit on the front cover at any desired inclination angle for reduction of total engine height, the distributor driving apparatus for an DOHC engine, in particular comprises two camshaft sprockets fixed to two camshafts; an idler sprocket rotatably supported between the two camshafts and the crankshaft; a first chain reeved around the crankshaft and the idler sprocket; a second chain reeved around the idler sprocket and the two camshaft sprockets; and a distributor driving gear fixed to the idler sprocket. Therefore, when the crankshaft is rotated, the idler sprocket is driven by the crankshaft via the first chain and therefore the distributor unit is directly driven by the distributor driving gear. On the other hand, the camshaft sprockets are driven by the idler sprocket via the second chain.

Abstract: There is disclosed a device for cutting a superfluous edge portion of an interlayer of a laminated glass. The device comprises an ultrasonic cutter including an ultrasonic generator and a cutter knife, the cutter knife being ultrasonically vibrated to cut the superfluous edge portion thereby to produce a cut part of the same; a structure for moving the ultrasonic cutter along a given way extending around the periphery of the laminated glass; and a dag holder moved together with the ultrasonic cutter and slidably carrying thereon the cut part of the superfluous edge portion to promote flowing of the cut part from the remainder of the superfluous edge portion toward a given position.

Abstract: In an engine having a camshaft mounted on a cylinder head via plural camshaft supporting portions; a camshaft sprocket coaxially coupled to the camshaft; an idler sprocket rotatably supported between the camshaft and the crankshaft on the cylinder head; a first chain reeved around the crankshaft and the idler sprocket; and a second chain reeved around the idler sprocket and the camshaft sprocket, an oil jet hole is formed in the frontmost camshaft supporting portion in communication with a main oil passage via an annular oil groove formed in the camshaft and an inclined oil groove formed in the cylinder head, so that lubricant can be sufficiently jetted from the oil jet hole to the second chain located near the frontmost camshaft supporting member, without use of an additional oil jet pipe member.

Abstract: To allow engine lubricant to quickly and smoothly flow downward along the inner wall surfaces of the chain casing formed in front of an engine having at least one camshaft, an idler sprocket, and first and second chains, the chain casing is composed of a head side chain casing fixed to a front end of the cylinder head, a rocker cover fixed to top ends of the cylinder head and the head side chain casing, and a block side chain casing fixed to a front end of the cylinder block in such a way that lubricant can flow downward on the basis of gravity along the inner wall surfaces of the chain casing.

Abstract: To increase the rigidity of camshaft bearing portions of the cylinder head on the camshaft driving side of an DOHC engine, an each member for symmetrically supporting two camshafts is formed integral with the cylinder head in such a way that the inner arcuate surface thereof extends to both inner side walls of the cylinder head.

Abstract: Passage means is provided to feed atmospheric air into the vacuum chamber of a vacuum actuator of a breaker plate and a control valve is provided to control the amount of atmospheric air fed into the vacuum chamber to make the vacuum in the vacuum chamber equal to the intake manifold vacuum during engine operation below a predetermined speed and above a predetermined load and to reduce the vacuum in the vacuum chamber to a predetermined level lower than the intake manifold vacuum during engine operation above the predetermined speed and below the predetermined load so that the ignition timing of the engine is adequately retarded during running of the engine at low load and at low speed and medium load and the engine ignition timing is not retarded or is slightly retarded during running of the engine at high load and at high speed and medium load.