GB191500565A - Improvements in or relating to Gyro-compasses. - Google Patents

Abstract

565. Perry, J., and Brown, S. G. Jan. 13. [Cognate Application, 10,471/15.] Gyroscopic compasses.-The mounting of the gyro-system of a compass is connected to the ship or to a part of the apparatus moving with it by resilient means which resist disturbances due to rolling, pitching, or acceleration of the ship. As shown in Fig. 1, the mounting comprises a gimbal ring B which is pivoted at b on a frame A, secured in or parallel to the longitudinal axis of the ship, and pivotally supports a pendulous frame C. An orienting frame D turns on a vertical axis d within the frame C and supports the gyro-casing E, which is mounted on pivots e and is stabilized by springs e<3> and damped by the means described in Specification 22,379/14. The resilient means comprises two pairs of springs F', each pair connecting a pin c<1> on the frame C to two arms b<1> on the ring B, to resist rolling disturbances, and springs G connecting lugs b<2> on the ring B to the frame A, to resist pitching disturbances. The springs F, G may be horizontal or inclined, their inclination and tension being adjustable, if desired. A compass in which disturbances due to acceleration of the ship are resisted may be constructed with the pivot axes of the ring B and frame C intersecting approximately at the centre of gravity of the system, and with a vertical spring connecting the lower end of the frame C and the ship. In the modification shown in Fig. 3, in which acceleration and rolling disturbances are resisted, the ring B has a pivot axis b passing through the centre of gravity of the system and arms b<3> to which vertical springs H' are attached. Springs F are connected as shown in Fig. 1. The card D' may be mounted as described in Specification 5377/15.