Patent GB-177289-A (GB)
Title: Improvements in or relating to gas producers
IPC: C10J3/30
Filed: 1921-01-11
Abstract: 177.289. Dickson. D. B. Jan. 11, 1921. Charging.-In a gas-producer the fuel-feeding mechanism is automatically controlled by the level of the fuel in the generator, being rendered inoperative when the fuel reaches or exceeds a certain level. The producer 1 shown is of the cylindrical type, the cover 2 being provided with a central chamber 3, having a gas-outlet 4, and towards the side with the fuel-feeding mechanism. A fuel distributing and levelling device comprises a head 6, having a series of radial arms 7 mounted thereon, and carried by a hollow shaft 5 which is rotatably and adjustably mounted in bearings 12, 12a, secured centrally to the top and bottom of the chamber 3. The bearing 12 has an upwardly extending flange 13 with which a gas-tight joint is made by a flange on the lower surface of a worm-wheel 15, adjustably secured to the shaft 5. The arms 7 of the distributor are connected by a series of links 8 to a rod 10, which, extending upwardly through the shaft 5, is fixed to the top of a cylindrical cover 11 which, together with a grooved collar 16, is urged upwardly by spring 18. The shaft 5 is rotated bv a worm 21 carried by a shaft 19 which is also provided with a cam 23 adapted to engage a roller 44 on a pivoted arm 24. The free end of the arm 24 is pivoted to a rod 43 which, through a lever 40, rotatably mounted on a shaft 41, and a rod 39 reciprocates the piston bucket 37 within the feedcylinder 26. The cylinder 26 is provided at its lower end with pivoted doors 27 adapted to be opened by the pressure of the piston bucket 37 on the fuel in the cylinder, the pressure required to open them being variable by means of adjustable counterweights 90. The upper end of the piston bucket and the lower end of a feedshoot 28 located above it are each provided with a pair of pivoted doors 30, 29, adapted to open upwardly and downwardly respectively, these doors being pivotally connected to bell-crank levers 34, 31, the inner ends of which are operated on by vertically slidable tappets 36, 33. These tappets are so arranged that they do not contact when the bucket 37 is at its highest point, the opening of the doors 29, 30 being effected at the appropriate time by the insertion between the tappets 36, 33 of a member 45 which is gripped between the tappets on the upward stroke of the bucket. The member 45 is carried on the end of an arm 58 pivoted to a fulcrumed lever 57 the free end of which engages in a U-shaped slot 56 formed in a fitting 50 which is pivoted at 49 to the bracket 48 and provided with a pin 51 connected by a spring coupling 55 to the free end of the arm 24. When the fuel in the generator reaches a predetermined level the blades 7, operating through the links 8, cause the rod 10 to drop, carrying with it the cylinder 11 and the collar 16. The groove 17 in the collar is engaged by an arm 70 secured on a shaft 69 which also carries a crank 71 pivoted to a rod 71<a>, the lower end 72 of which is hookshaped and adapted, when the collar 16 drops, to engage a pin 73 on the fitting 50 and thus prevent insertion of the member 45, consequently cutting off the supply of fuel. The doors 29, 30 are closed by the spring arrangement shown in Fig. 6, the springs operating the doors 30 being weaker so that these doors open first and close last. Any adjustment of the shaft 5 from the normal position necessitates the use of a cylinder 11 of different length in order to maintain the collar 16 at the proper height, or the collar may be threaded on the cylinder and adjusted with the shaft 5. A pivoted plate, operated through a series of levers by the shaft 41, is provided to throw off any fuel which falls from the shoot 28 after the doors of the piston bucket have been closed.