Patent GB-190625526-A (GB)
Title: Improvements in or relating to Water and Heat Regulation for Steam Generators.
Inventor: BOULT ALFRED JULIUS
Filed: 1906-11-12
Granted: 1907-11-12
Abstract: 25,526. Boult, A. J., [White, R. -H.]. Nov.12. Feed-water, controlling. -Relates to means for controlling the supplies of water and fuel to the generators of motor-cars, and more especially to those of the White steam car. Fig. 1 sh o w s the general arrangement of the apparatus. The water supplied by the pump D, which is run continuously from the motor B, can pass to the generator through a main feed-pipe M, M<1> fitted with a regulator R, and also through a supplementary feedpipe N, N<1> fitted with a regulator T, which is operated by the temperature of the steam ; the regulator R is operated by the flow of water in the pipe M, M<1>. The fuel is supplied from a tank G and is controlled by a valve P, which is connected directly with the regulator R. There is also a bypass H,.which opens automatically and allows tne delivery from the pump D to return to the suction side when the pressure of steam rises above a certain amount. The by-pass H is similar to that described in Specification No. 16,423, A.D. 1903. Normally, about one-third of the water entering the generator passes through the supplementary feed-pipe N, N'. Any excess of water returns to the feed-tank E through a pipe X. If the speed of the motor is such that the capacity of the pump is equal to, or greater than, that of the generator, and the steam then rises above a predetermined temperature, the regulator T opens more fully the valve in the pipe N, N', thus increasing the supply of water through this pipe. The supply through the main pipe M, M<1> is not, however, affected, so that the supply of fuel is not varied. Again, if the steam falls below the predetermined temperature, the supply of water through the pipe N, N' is decreased. If, however, the speed of the motor is such that the capacity of the pump is less than that of the generator, any variation in the supply of water through the pipe N, N<1> causes a corresponding variation in the supply through the main pipe M, M<1>; the regulator R will then vary the supply of fuel through the valve P. The regulator R is shown in detail in Fig. 2. The water entering through the port r presses the piston r' in the direction of the outlet port r<1> against the action of a spring. A restricted passage r<4> in the side of the regulator allows the water to leak past the piston to an outlet r<1>. The piston r<2> is connected directly with the fuel valve P, the spindle of which is gradually reduced in area, as shown. The relief valve r<6>, for allowing excess of water to pass back to the tank E through the pipe X, is normally closed by a spring, but is opened by the piston r<2> when the latter reaches a predetermined position. The regulator T consists of a metal tube w, Fig. 4, fixed at one end and enclosing a rod w<1> of glass, porcelain, &c. The outer end of the rod w<1> engages one arm of a bell-crank t<5>, the other arm of which is kept in engagement with the spindle of the valve t<2> by a spring t<6>. Specification No. 13,760, A.D. 1900, is referred to.