GB191210241A - Steering Gear, particularly for Submarine Boats. - Google Patents

Abstract

10,241. Locarni, V. April 30. Systems for controlling travel for a fixed distance or number of revolutions.-In an electric steering-gear comprising a motor fed by a rotating transformer with a differential gear operating the rheostats, such rheostats providing for an increasing torque as the rudder moves from its mid-position, a clutch is used between the two driving parts of the differential gear, whereby the rudder is automatically hand-actuated when the electric gear is not in use or breaks down. An electric motor 7, Fig. 1, drives the sector 5 on the rudder head and also a shaft 8, which is geared to a bevelwheel 23. The hand-wheel 10 is on a shaft 9 adapted to be coupled to the shaft 8 by a clutch 11, and is also geared to a bevel-wheel 22. The clutch 11 comprises an arm 12 on the shaft 9 and an internal projection 14 on a hollow drum 13 keyed to the shaft 8, Figs. 1 and 4. The driving-plant comprises a motor 7 fed with direct current and having separate excitation, a prime mover 17 driving a generator 16 with transformer 15, a rheostat 18, and a regulator 19. This regulator comprises a differential gear of which the two bevels 22, 23 are part. These wheels are loosely mounted on a shaft 24 carrying the third member 25 and also a contactlever 3 of a rheostat 17 which controls the excitation of the generator 16. Upon moving the wheel 10 on either side of its mid-position, the lever 3 is moved by the differential gear. with a consequent excitation of the circuit of the generator 16. A second regulator comprises a rheostat 2, the controlling-lever 4 of which is driven directly from the transmission gear 20, the arrangement being such that in the mid-positions of the sector 5 and lever 4 a small excitation of the circuit of the motor 7 occurs, this excitation increasing as the sector moves from the mid-position. At the same time, since the shaft 8 is rotated by the motor 7, the member 23 of the differential rotates and brings the lever 3 back to the mid-position of no-excitation. The two members 12, 14 of the clutch 11 are also continuously diametrically opposite, since they have equal angular movements in the same direction. When the electrical gear is in use, the line switch 26 is closed, the circuit being completed by the rheostat 18. In a modification, for use with horizontal rudders on submarine vessels, two or more rudders are adapted to be clutched for simultaneous operation.