GB191215410A - Improved Means for Controlling the Supply of Motove Fluid to Marine Engines. - Google Patents

Abstract

15,410. Kerr, A.. July 2. Automatic gear; hand, foot, and like gear; stop-gear.-Relates to apparatus for controlling the stop-valves of marine engines when the immersion of the propellers is decreased or increased by the motion of the ship or sea, which apparatus may also be hand-controlled or operated by the governor to stop .the engine at excessive speeds, or may be disconnected to enable the stop-valve to be operated by hand. A. piston a<1>, under the control of springs and the pressure of the water outside the ship, has a rod a<2> provided with tappets t<1>, t<2>, t<3>, which engage catches on a pivoted frame m provided with a roller m<4>, which engages a lever o arranged to actuate a slide valve b movable in a chest supplied with water under pressure. The valve b controls the motion of an auxiliary piston i<1> connected to the distributing-valve c of a liquid-pressure relay cylinder d, the piston d<1> of which is connected to a lever e operating the stop-valve. The chests of the valves b, c are supplied with hydraulic pressure from pipes 4, 4<a> connected to an air-vessel p supplied from the main-feed pipe f, or the donkey-feed pipe g. The pipes 1, 3 connect the valve-chest b<0> with the condenser or hot-well and the cylinder i. The ports c<2>, c<4>, which are provided with easing openings c‹ and controlled by the valve c, are connected to the ends of the cylinder d by pipes 5, 6 provided with valves d<2>, d<4>, d<14>. The cock d<4> may be connected to the cylinder d at intermediate ports d<15> to set the piston at half or other suitable stroke. The pipes 1, 3 are provided with valves q, which may be turned into the position shown in Fig. 1<a>, to close the main valve by hand, or by a governor at excessive speeds to stop the engine. The rod d<0> of the piston d<1> is provided with means for regulating its length and the load on the engine stop-valve, and the cylinder ends are provided with air vessels d<10>, d<11> to prevent knocking. To operate the main valve directly by hand, the rods h, h<1> are connected by cotters, and the cocks d<2>, d<14> turned to put the two sides of the piston d into communication with the atmosphere. To operate the auxiliary valve c by the hand-lever c<5>, the cock i<2> is turned to atmosphere so that the relay piston can be held in any desired position. The cock 2<a> may be turned to control the speed of the piston d<1>. In a modification, the valve b controls three ports arranged to prevent the leakage past the valve operating the piston i<1>.