Patent GB-341885-A (GB)
Title: Improvements in rotary engines and pumps
IPC: F02B53/02
Filed: 1929-10-09
Abstract: 341,885. Rotary engines. WILLIAMS, J., 94, Nelson Street, Auckland, New Zealand. Oct. 9, 1929, No. 30620. [Class 110 (ii).] Movable-abutment type.-A rotary engine has an external combustion chamber 49, Figs. I and 2, into which is admitted compressed air followed by the injection of fuel and then atomized water. The combusted gases and steam thus formed are led to the working chambers of the engine. A rotary air compressor 10, Fig. 1, and a rotary engine 1, which are reversible, have a common working shaft 8. The rotors for both engine and compressor are oval shaped, abutments being provided by means of outwardly sliding spring-loaded plates. Each sliding plate 26, Figs. 3 and 12, has a groove in which packing pieces 30, Fig. 13, are fitted, the ends 30a of which rest in slots 31 in the plates. The flat side of a packing piece 30 bears on the rotor periphery. The rotor, Fig. 6, has a packing strip 9 which is pressed against the inside wall of the casing 1, Fig. 3, by springs 9a. Spring-loaded compression rings have teeth which fit into slots 40 at each end of the rotors. Additional spring- loaded packing pieces are fitted at each end of strips 9. A centrifugal balancing device 45 is incorporated to keep the strip 9 on to the rotor by means of a tee-piece 42a on an arm 42. The rotor has a balance weight 99 fitted. A cam on the shaft 8 bears on the legs 32 of the plates 26, Fig. 12, and lifts the plate clear of the rotor point as it passes. Fig. 4 shows the engine casing. A fitting 16, which contains the inlet and delivery valves of the compressor and the engine, fits on to machined faces 3 and on similar faces on the compressor casing, and has slots which register with the inlet and outlet slots 5, 6 and similar slots in the compressor casing. A slot 4 accommodates the sliding plate 26. The air compressor has inlet valves 18 and delivery valves 20, Figs. 1 and 2, these being duplicated at each side of the casing, one of each being used for one direction of rotation. These valves are operated automatically by the suction and compression of the air acting against springs. The oil and water pumps 67a, 67 are operated by cams 69, 68 on the engine shaft 8. The engine inlet and exhaust valves 22, 24 are also duplicated on each side of the casing for reversing purposes. Valves 22 are operated by a cam 60 through rods and bell-crank levers 58, 57, 56, 55. A boss 52 on each valve stem, Figs. 1 and 3, is engaged by one end of a valve lifter 53 which is slidable on a rocking shaft 54. A rocking lever 61, Figs. 1, 3, with an arm 62 attached, enables whichever exhaust valve 24 it is desired to open, to be forced and held inwards, either through the operation of a pull-wire 63, or the reverse action of a spring 64 in tension. The exhaust valve operating means at each side of the engine, are coupled together so that only one exhaust valve at each side is open at one time, said means being also connected with the means for setting the working- fluid control valves 22. Reversing means are provided in a lever 73 which is keyed to a rod 72, Figs. 1, 2, 3. An arm 75 fixed on the rod 72 is connected by wires 76 with the valve lifters 53, one at each side of the engine, and springs 77 attached to the valve lifters 53 act in opposition to the pull in the wires. A further arm 75 is connected bv the wires 63 with the arms 62 of the rocking levers 61 on each side of the engine. Sparking-plugs 71, Fig. 2, are fitted to the combustion chamber 49 for firing the explosive mixture when starting up, after which the mixture is fired by the heat of the air from the compressor 10. An ignition timer disc 70, Fig. 1, for supplying electric current to the plugs 71, is keyed on the shaft 8. Oil pumps 78 operated by a cam 79 on the shaft 8 are provided to force oil through pipes 80 for lubrication purposes. Ball bearings for the shaft are lubricated by grease cups 82, Fig. 1. Openings 84 are provided in the ends of the casings and cooling air is circulated through the rotor 7 by the spokes 7b, Fig. 3, which are inclined to act as a fan. The cam portion 85 of the cam 60, Fig. 25, can be adjusted circumferentially.