Four-cycle internal-combustion engines having the supply or exhaust valve thereof, or both, located in the cylinder head and disposed longitudinally to the working cylinder, the movement of such valve or valves being along a line parallel with the axial line of the working cylinder, a lever disposed transverse to the working cylinder and a reciprocating operating member operated by and in unison with the engine for operating such valve or valves in the proper order to secure continuous operation thereof, and similar arrangements of valves and operating means therefor, but not shown in connection with all the elements necessary to form a complete and operative engine.
