Patent GB-190822709-A (GB)
Title: Improvements in and relating to the Feed of Combustible to Vapour Burners.
Inventor: AHLSELL FRITIOF LUDVIG
Filed: 1908-10-26
Granted: 1909-07-29
Abstract: 22,709. Ahlsell, F. L., and Thompson, L. O. T. Oct. 30, 1907, [date applied for under Section 91 of Patent.s &c. Act, 1907]. Compressed-air engines; hot-air engines.-Liquid fuel is fed to vapour burners for lamps, stoves, &c. by one or more diaphragm pumps driven by fluid under pressure. In one arrangement, Fig. 2, a diaphragm pump 4 is actuated by carbonic acid from a holder provided with a reducing valve, the whole apparatus being immersed in the liquid-fuel receptacle. Carbonic acid flows into the pump through a passage 3, and passing through holes 16 and an annular space between the central rod 14 and the outer cylindrical part 15 of the valve 11, enters the chamber 10 beneath the diaphragm 5. The pressure of the gas causes the diaphragm to rise against the counter pressure of a spring 25 and to force oil left in the chamber 6 from previous workings of the pump through a valve 8 into a pipe 9, and subsequently through tubes 9<1>, 29 to the burner. Fixed to the diaphragm is a plate 21, from which projects a rod 22 provided with shoulders 23, 24, and - which passes freely through a bow-spring 20 and a cross-piece - 19 which connects together the valves 11, 12. When the diaphragm has almost reached its highest position, the shoulder 24 strikes the cross-piece 19 and causes the spring 20 to bend upwards, thus completely raising the valves 11, 12. The inlet valve 11 is thus closed, and the escape of the carbonic acid contained in the chamber 10 is permitted by way of the openings 18 in the cylindrical wall 17 of the valve 12, and the outlet pipe 13. The pressure in the chamber 10 falls, and the spring 25 then forces down the diaphragm 5. In its downward movement it draws liquid fuel in through the valve 7, the valve 8 remaining closed ; the shoulder 23 then strikes against the upturned bow-spring, causing it to return quickly to its original position, and thereby open the valve 11 and close the valve 12. This series of operations is repeated, the diaphragm constantly pulsating and forcing the supply of liquid fuel to the burner. The lamp is extinguished by screwing in the double-seated valve 27. This, being connected to the outlet valve of the carbonic acid holder, shutsoff simultaneously the supply of working fluid. Fuel in the pipe 29 drains past the valve 27 and through the return passage 30 into the fuel receptacle. Figs. 3 and 4 show an air or gas compressing device supplying air or gas to a fuel pump 4 of the type shown in Fig. 2. In this arrangement, a diaphragm pump 34 is driven by a diaphragm motor 33, the two being connected by rods 37. The motor diaphragm 38 is of larger area than the pump diaphragm 39, and actuates it through a rod 45. Above the lamp burner a spiral tube 31 or other device for heating air or gas is arranged, its upper end communicating with the motor inlet 32 while its lower end is connected with the pump outlet 35 The pump outlet also communicates with the liquid-fuel pump 4 by the outlet 36 and pipe 3. In the single chamber 44 of the motor, valves 40, 41 are arranged and act similarly to the valves 11, 12, Fig. 2. The suction valve 48 opens from the external atmosphere or a gas supply into the single chamber 46 of the pump, while the delivery valve 49 opens into the pipes 35, 36. When the apparatus is in action, air or gas is delivered from the pump partly through the heating-coil 31 to work the motor, and partly through the pipe 3 to actuate the liquid-fuel pump 4. The combustible pump may be driven directly by the motor.