GB560308A - Improvements in or relating to liquid pressure remote control systems - Google Patents

Abstract

560,308. Hydraulic transmission of power. AUTOMOTIVE PRODUCTS CO., Ltd., and SIMPSON, J. K. Nov. 12, 1942, No. 16026. [Class 69 (ii)] In a liquid pressure remote control system comprising transmitting and receiving cylinders 12, 16 movement of the transmitting piston to the end of its stroke opens a valve 29 to connect the line to a pressure source 38, e.g. an accumulator or pump, whereby any leakage is made up and the motor piston is forced to the end of its travel. In the two-pipe system shown the opposite end of the transmitter is simultaneously connected to a reservoir 40. The valve is normally centralised by a spring 28 all connec - tions to the cylinder being closed until a projection 51 on the rod 13 engages abutments 49, 50 on the valve rod near the ends of the stroke. In a single pipe system the valve connects the system to a pressure source at. the end of the pressure stroke and to a reservoir at the end of the return stroke. Fig. 3 shows a system in which the transmitter and motor. pistons 93, 98 are hollow and form cylinders for secondary transmitter and motor pistons 94, 99 operable independently. The rods 95, 96 of the two transmitters actuate valves 103, 102 to connect their respective cylinder ends to a pressure source and to a reservoir when both transmitter pistons reach the same end of their strokes. The transmitter rods may be connected respectively to parts of a searchlight moving in planes at right angles, the motor rods being similarly connected to a second searchlight whereby the two lights move in unison. Alternatively the device might connect a machine gun &c. to a remote sighting device.