Patent GB-215069-A (GB)
Title: Improvements in or relating to apparatus for the manufacture of gas
IPC: C10J3/24
Filed: 1923-01-30
Abstract: 215,069. Jackson, W. J. Mellersh-, (Western Gas Construction Co.). Jan. 30 1923. Valves controlled by pilot or relay valves.-In carburetted water-gas apparatus of the kind wherein the production of gas is controlled by a series of valves operable in a predetermined order, the several valves are operated automatically in the desired sequence and timing by hydraulic valve mechanisms which are controlled by a unitary power operated distributing device. This controlling device comprises a cylinder 56 provided with left- and right-hand sections 57, 58 within which is a distributor comprising a piston rod 73 with two spaced inner piston heads 74. 75 and two outer pistons 76, 77. The space between the inner faces of the pistons 74, 75 functions as a floating chamber 78 to which pressure fluid, such as oil, is fed from a supply line, while the pistons 76, 77 receive fluid pressure alternately on their outer faces from the chamber 78 through reversing valve mechanism mounted on top of the cylinder 56 and pipes 60, 81 for moving the distributor to the right or to the left in the cylinder 56. Each producer valve is operated by a piston the cylinder of which is provided at each end with a pressure line, one leading to the left-hand side of the cylinder 56 to one of the ports 63 - - 67 formed therein and the other leading to the right-hand side of the cylinder to one of the ports 68 - - 72. The reversing valve mechanism is operated from the piston rod 73 by a lever 98 engaging rollers 101, 102 on the rod 73 and in engagement with the reversing valve piston rod 88. In the position of the mechanism as shown, the ports 63 - - 67 are open to pressure fluid in the chamber 78 while the corresponding ports 68 - - 72 on the other side are open to the port 62 of an exhaust pipe 61. At the same time fluid passes from the chamber 78 through the reversing valve and pipe 80 to the outer face of the piston 76 thus causing the distributor to move to the right which effects reversal of the producer valves by placing the ports 63 - - 67 in communication with the port 60 of an exhaust pipe 59 and the ports 68 - - 72 in communication with the pressure fluid in the chamber 78. The movement of the distributor also operates the reversing valve through the lever 98 to reverse the direction of motion of the distributor at the end of its stroke. The ports 63 - - 67, 68 - - 72 are so positioned that the producer valves are operated in the predetermined order, the timing being controlled by a device comprising a series of adjustable orifices 108 traversed in succession by the pressure fluid controlling the movement of the distributor which, during exhaustion, passes from the outer face of the piston 77 through hollow piston rod 103, orifices 108 and pipe 111 to an exhaust pipe 116. The orifices 108 are controlled by manually operable needle valves 110. In a modification the mechanical connection between the distributor and reversing valve is eliminated by utilizing the fluid pressure supplied by the chamber 78 for throwing over the reversing valve piston rod 88.