GB1396676A - Marine vessel waterjet steering and reversing mechanism - Google Patents

Abstract

1396676 Propelling ships BOEING CO 6 Nov 1973 [25 June 1973] 51501/73 Heading B7V A marine vessel is propelled by a water jet 10 issuing from an exit 12 in the transom 14, and a cylindrical steering deflector 18 and a reversing deflector 16 are provided to act on the water jet 10 to enable the vessel to be manoeuvered, the deflectors 16, 18 being mounted on concentric shafts connected to operating mechanism inside an enclosure 26 in the vessel, the mechanism allowing independent movement of the reversing deflector 16, but ensuring that movement of the steering deflector will cause the reversing deflector to move with it. The steering deflector 18 is carried by a shaft 22 coupled by an arm 28 to an actuator 34, so that the deflector 18 may be pivoted from the position shown in Figs. 2 and 3, wherein the jet 10 passes unobstructed to deflect the jet to either side to provide steering control. The reversing deflector 16 is carried on a hollow shaft 30 concentric with the shaft 22, and the shaft 30 is coupled by an arm 32 to an actuator 38 acting between the two ends of the arms 28, 32 remote from the shafts 22, 30. In Fig. 3 the deflector 16 is set clear of the jet 10 allowing forward movement of the vessel and in Fig. 2 it has been pivoted by the actuator 38 so as to deflect the jet 10 in a forward direction to provide a reverse thrust on the vessel. By control of the actuator to give intermediate positions of the deflector 16 with part of the jet 10 deflected forwardly and part passing unobstructed, the vessel may be driven at varying speeds in forward or reverse directions or be held stationary without stopping the full flow from the exit 12. In this way the actuator 38 controls the speed and forward or reverse movement of the vessel and by its mounting will be unaffected by steering movements of the deflector 18 caused by the actuator 34 acting solely on the arm 28. 1396686 Cleaning aircraft and ships L ARATO 6 July 1973 [14 July 1972] 32320/73 Headings B7J and B7M Cleaning plant for an aircraft or ship consists of a scale model of the craft whose surface coordinates are read by a scanner 11 connected to a coder 12 having output signals corresponding to values x, y, z in space, the coder passing these signals via a calculator 13 to a store 14 into which boundary conditions can be fed via keyboard 15. The calculator is monitored at 17 via decoder 16 and the values from the calculator 13 passed to a recorder 18 and hence a record carrier 18<SP>1</SP> or direct to a transmission line 20. The craft, e.g. aircraft 50, is cleaned by roller brushes 19, Fig. 4, movable along rails 55-60, each brush cleaning one or more specific parts of the craft, which latter is located on a turntable 53 to enable it to be rotated 180 degrees. Each brush consists of brush part 19 pivoted at 20 to a two part linkage 22, 23 itself pivoted at 24 to a carriage 40 movable on carriage 42 which runs on one of the rails 55-60. The brush part 19 has degrees of freedom x, y, a, #, γ, γ<SP>1</SP> and # each controlled by a servomotor 33. A local transmitter has a reader for the record carrier 18<SP>1</SP> with output channels corresponding to each of the degrees of freedom. Each output, except Q, leads to one input of a respective differential amplifier whose output controls a respective servomotor 33 by two relay stages. The output of freedom Q is connected via an amplifier to a drive motor for brush 19. A position transmitter coupled to each servomotor issues an output signal feed back to a second input of the respective differential amplifier. Instead of record carrier 18<SP>1</SP> transmission line 20 may be connected directly to the differential amplifiers. In a modification a number of brushes 19 may be mounted on a gantry movable on rails, each brush being individually controlled.