toward the outlet port 84 gases entering the said chamber will push the circular plate in a downstream direction and thereby closes the outlet port to build up pressure inside the said chamber when pressure in and at the inlet port falls as a result of a gate opening in the primary compressing chamber 33 the pressure built up inside the high pressure compressing chamber will push the circular plate in an upstream direction and causes the rod and the conic body to be pulled in the same direction to open outlet 84 magnets 87 and 87a prevent premature opening or closing of the outlets the assembling of the engine is very simple the power output shaft 16 is inserted in the central opening 16a of the central cylindrical wall fig3 the gates 21 and 22 with their shafts 9 and 9a through them are positioned in the para elliptic openings 10 and 10a in the peripheral section of the said cylindrical wall the ends of each gate 39 s shaft are rotatably held in the engine 39 s casing and the said cylindrical wall each column 11 11a is securely positioned in each of the said para elliptic openings the rotors are then placed close to one on each side of the said cylindrical wall with their radial sides positioned parallel to those of the.