16,862. Stott, J. F. Aug. 11. Hydraulic transmission of power.-In telemotor apparatus for steering ships, the steering-engine is stopped by the rudder through hydraulic connexions, the rudder in its movement acting upon a piston, the cylinder of which is connected with the cylinder of the engine-valve control piston, so that the valve - control piston is returned to normal position by the action of the rudder piston. Fig. 5 is a side elevation or the steering-wheel and piston ; Fig. 8 is a sectional plan showing the valve-control piston b and the rudder piston c mounted in the same cylinder e. The piston-rod g of the steering- wheel piston a is actuated by means of the bevelwheel i, which is threaded to engage a threaded portion on the non-rotatable piston-rod g and is geared to the steering-wheel l. A chamber h2 in the standard h contains a small quantity of liquid to compensate for leakage of liquid and is connected with cylinder d through a pipe with a non- return valve. The position of the piston a and therefore of the rudder is indicated by means of a pointer y, Figs. 5 and 7, connected to the pistonrod g by a pivoted rod z passing through a sleeve x1 on the axle of the pointer y. The valve-control piston b, Fig. 8, is provided with springs t, which bear on a collar fast on the piston-rod m so as to return the piston b to its normal central position. An arrangement for enabling the rudder to operate aft independently of the fore steering-wheel is shown in Fig. 9. The rudder piston-rod n is connected by links o to the tiller quadrant p and to the threaded shaft q of a steering-wheel. The operation of the steering-wheel moves the rod n of the rudder piston c, which causes a movement of the valve-control piston b. The consequent movement of the rudder causes the piston-rod n to be returned to its normal position by means of the link o pivoted to the tiller quadrant.
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