Brakes – Inertia of damping mass dissipates motion
Patent
1983-07-21
1986-07-01
Reger, Duane A.
Brakes
Inertia of damping mass dissipates motion
33346, 74 55, 92 35, 92 41, 248638, 267122, 285227, 403 50, F16F 910
Patent
active
045974756
DESCRIPTION:
BRIEF SUMMARY
The invention relates to a universally movable suspension member, especially for a gyro system, in accordance with the preamble of claim 1.
Such a suspension member for gyro systems has been proposed in the German Patent Application No. P 30 11 727 for a gyro system. In said system, which is disclosed also in U.S. Pat. No. 4,376,726, the gyro system actually is not suspended from a bellows but from a pendulum mounted on a ball bearing in the revolving disk. To the upward extension of the pendulum there is mounted a body which is movable within a tank filled with a damping liquid. The mounting of the lower pendulum end to the gyro system is effected via a vibration absorbing spring system. Further a complex, ball-bearing supported horizontal shifting system is provided between the lower end of the pendulum and the gyro system. In this way a horizontal displacement of the gyro system is also possible.
The method described in the Patent Application No. 30 11 727 is relatively complex and therefore expensive. In particular the upwardly extending pendulum system requires a relatively large amount of space.
It is the object of the present invention to design a suspension member according to the preamble of claim 1 in such a way that the volume of construction is decreased and the manufacture is less expensive while a reliable and accurate indication is still obtained.
In accordance with the invention the above-specified object is solved by the features of the characterizing portion of claim 1. Further developments of the invention are set out in the subclaims.
A field of use resides in the implementation of the gimbal mounting required for magnetic compasses, repeater compasses and similar applications.
The preferred field of use, however, is that of suspending a gyro system from the revolving disk which is connected to the compass face and is rotatable relative to the ship's mounting structure. The elastic or spring properties cause restoring of the initial position without the action of external forces.
For such a use as pendulum joint the following requirements are satisfied at the same time:
a gimbal mounting,
a decoupling from horizontal vibrations caused by the mounting to the ship's body,
spring properties in vertical direction and thus resistance to vertical motions of the ship,
a damping of pendulum-like oscillations upon rolling and pitching motions of the ship,
the practically angle-error free transmission of torque during rolling and pitching motions of the ship.
In a preferred embodiment of the invention the internal diameter of the double bellows unit is selected to be sufficiently large so that the entire gyro system or a large part thereof, i.e., the eveloping sphere including the pump and the floating sphere, may be disposed in the interior free space. Thereby the following further advantages relative to known gyro systems are achieved:
The overall length and thus also the overall pendulum length are substantially reduced; the pendulum pivot of the double bellows unit is positioned between the upper third and half of the bellows length relative to the upper bellows suspension.
While there is the same axis of freedom of the suspension, the diameter and the length of the external casing may be kept smaller.
The number of parts required for the overall gyro system is decreased.
There are no mechanical parts subject to wear relative to the prior art, especially relative to the subject-matter of the German Patent Application No. P 30 11 727.
The overall system is considerably less expensive to manufacture.
Due to the configuration of the invention it is also possible to do without an additional damping system above the revolving disk and without a resilient damping system between pendulum suspension and gyro system. Also, no special means for a horizontal displacement of the gyro system have to be provided. Furthermore, a pendulum suspension means is also not required.
On account of this substantial simplification especially a number of parts subject to wear, such as ball bearings, compression spring
REFERENCES:
patent: 2842358 (1958-07-01), Nardi
patent: 3002741 (1961-10-01), Akutowicz
patent: 3530770 (1970-09-01), McMurray
patent: 3545231 (1970-12-01), Downey
patent: 3722875 (1973-03-01), Hasse
patent: 3834741 (1974-09-01), Drake
The Marine Engineer and Naval Architect, vol. 84, No. 1023, Aug. 1961, Maidstone (GB) "A New Plath Gyro Compass", p. 1000, (C. Plath).
Product Engineering (General Electric Co.) Jul. 1954, "High-Viscosity Silicone Fluids for Mechanical Applications", (Dugan).
Bey Ulf
Lassig Martin
Anschutz & Co. GmbH
Gilday Michael P.
Reger Duane A.
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