Patent GB-190411084-A (GB)
Title: Improvements in Apparatus for Supplying Water and Liquid Fuel to Steam Generators
Inventor: CAROLAN EDGAR ALFRED
Filed: 1904-05-13
Granted: 1905-05-13
Abstract: 11,084. Carolan, E. A., [General Electric Co.]. May 13. Plunger pumps; hand-pumps; actuating pumps; pump valves; delivery, regulating.- Feedwater for instantaneous boilers used, for instance, in motor road vehicles, and liquid-fuel for the burners which heat the boilers, are regulated automatically according to the varying demand occasioned by the changing or abnormal conditions of service. Fig. 1 shows diagrammatically the general arrangement of the system, Fig. 2 a side elevation of the pumps and their actuating-mechanism, Fig. 5 a section through the water and fuel pumps, Fig. 6 a cross - sectional elevation of the pumps, Fig. 7 a sectional elevation through the fuel-pump valves, and Fig. 8 a view of one of the waterpump valves. Water is supplied from the tank 7 by two pumps 8, 9, the hand or foot actuated pump 9, Fig. 1, being mounted directly under the pump 8, as shown in Figs. 5 and 6, while the fuel pump 10, supplied from the tank 11, is mounted at the side. By means of a valve 15 worked automatically by any suitable means or by hand, a bye-pass is opened and the fuel pump is shunted. A hand-pump 12 is provided for supplying initial pressure in the tank 11. The power pumps are driven from the engine 3 through the eccentric 23 and a series of rubber buffers 22 and crossheads 21, 19, the crosshead 19 being pivotally connected to the rods 18 and to the crosshead 17 of the water pump 8. On a movement of the eccentric-rod in one direction, if the pressure behind the plunger 16 is not too great, the plunger 16 will be drawn into the pump barrel against the pull of the springs 20, and, at the same time, by reason of the projection 28, the plunger of the pump 10 will be drawn out of its barrel against the springs 30. On the reverse stroke of the eccentricrod, the springs 20 are free to act and to withdraw the plunger 16, but, if the pressure in the burners is too great, the spring 30 is unable to retract the plunger into the barrel, with the result that fuel is not supplied until the pressure is reduced and the spring has been able to effect the stroke. In each case, the effective stroke is made by the recovery of the distended springs. If the pressure of water behind the water pump 8 is abnormal, the stroke of the eccentric 23 is absorbed in compressing the rubber buffers 22, which intervene between the eccentric and the pump-rods 18. The plungers of the pumps are packed with the flanged sleeve 45, Fig. 5, having a tapering extension into the chamber 46, which contains fluid under pressure. The disc 47, flanged ring 49, and adjustable nut 48 are also provided. Fig. 6 shows the arrangement of the pump valves, of which the discharge valve 53 is common to both the power-actuated and the manually-operated pumps 8, 9. Water is supplied to both the pumps by the pipe 37, the water during the operation of the pumps lifting the valve 52. Each valve, as shown in Fig. 8, is bedded upon a conical seat 55 and is formed with the soft rubber ball 52 above the stem 56. A body of heavy viscous material, such as glycerine, is interposed between the plunger of the fuel pump and the fuel, so that the naphtna or kerosene is prevented from entering the pump barrel. The glycerine is withdrawn aud returned to the reservoir 62 on the side of the pump casings. As a result, ordinary plunger packings may be used. The valves of the fuel pump may each be formed with a soft-rubber head and a depending stem, the seating being conical ; or metal balls 64, 65, Fig. 7, with conical metal seats, may be employed. The valves and their seats are separable from the pump casing and are inserted and withdrawn by the removal of the glands 67. The valve seats are reversible. The valves may be duplicates and may be placed in series to allow for a valve failing in its action. Discs 68, having each a triangular passage, are provided.