Patent GB-457539-A (GB)
Title: Improvements in or relating to devices for producing acetylene gas
IPC: C10H1/00
Filed: 1935-05-31
Abstract: An acetylene generator comprises a gas-producing chamber alternately connected with a carbide feeding and discharging device, a rotary knife in the chamber for stirring the carbide, and a pump for injecting water in the form of a spray and in such amount that the formation of slime is avoided.  A rotatable <PICT:0457539/IV/1> 9 are provided in the cylinders 5.  A felt band 6 encircles the cylinder 4 closing all the charging slots except the top one which communicates with a charging casing 47.  The cylinder 7 surrounds a stationary casing 12 through which a shaft 21 having a conveyer worm extends, a felt band 74 encircling the casing.  A passage 72, 73, staggered about 35 DEG  relative to the vertical, is formed in the cylinder 12 and band 74.  A rotary scraper 14 having comb-like projections is provided in each cylinder 5 being journalled in the end plates 10, 11.  A driven shaft 17 through suitable gearing rotates the shaft 21 which in turn rotates the stirrers 14.  The cylinder 4 is toothed at 24 to engage a single-toothed wheel 25 rotated by pawl-and-ratchet mechanism actuated by a cam 29 on shaft 21.  A variable lift pump driven from the shaft 21 supplies water through duct 30 to spraying nozzles 40, the injection period being about \ba1/5\beth revolution of the cylinder 4.  Cooling water is supplied through ducts 34 to the spaces between the cylinders and then discharged.  The charging casing 47 is provided with a stop cock 48 which is opened through gearing only when the measured quantity of carbide in the casing 47 has been fed to a cylinder 5.  A guide plate 58 is tilted by means of a cam 66 each time a slot 8 is located beneath the casing.  Two feed channels and guide plates may be provided.  The residual lime in powder form is fed by the conveyer to a shaft 84 closed by a valve 87.  Two ejecting segments 82 extend into the shaft 84 and are alternately moved through suitable gearing operated by a semicircular gear 79 on the shaft 21 to press down the residue and discharge it through the valve.  The generated acetylene cylinder 4 closed by end plates 10, 11 contains cylinders 5 surrounding a cylinder 7.  These members are all rigidly connected and housed within a casing 1. Charging slots 8 and outlets <PICT:0457539/IV/2> escapes to the space between the cylinders 1 and 4, being purified by passage through the felt 6, and flows to discharge cocks 89. Impurities carried by the felt band are removed by a scraper 70 in the filling duct 64. Entrained water in the gas is removed at 93.  Internal-combustion engines.--For driving the generator, an internal - combustion engine operated by the acetylene can be used.  This may be a two- or four-stroke engine and in the former the gas may be introduced into the crank-case, bores in the crank-shaft controlling the inlet. Alternatively, a compressor supplies the gas to the working cylinder. An excess pressure valve on the compressor returns excess gas to the generator.  The gas may be introduced, immediately before the ignition point, into a cylinder previously charged with air whereby high pressures can be used and premature ignition avoided.  A regulating valve, controlled by a throttle or other device regulating the air supply is positioned between the compressor and engine.  A transmission gear is disposed between the motor and the driving shaft of the generator.  A coupling may also be provided actuated by a control piston which is moved when the gas pressure exceeds a certain limit so that the generator is stopped when the gas pressure rises and automatically starts when the pressure falls.  In modifications, the carbide may be supplied at the centre of the ring of chambers 5 and discharged at the lowest point of this ring, both charged and discharged at the centre, or supplied at the top of the cylinder 4 as shown and discharged at the bottom thereof after only half a revolution of the cylinders 5.