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Publication numberUS944511 A
Publication typeGrant
Publication dateDec 28, 1909
Filing dateMar 17, 1908
Priority dateMar 17, 1908
Publication numberUS 944511 A, US 944511A, US-A-944511, US944511 A, US944511A
InventorsErnst Otto Schlick, Max Wurl
Original AssigneeSwan Hunter & Wigham Richardson Ltd
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
Apparatus for minimizing the oscillatory movements of ships and other oscillating bodies.
US 944511 A
Abstract  available in
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Claims  available in
Description  (OCR text may contain errors)


- fatenteanec. 28, 1909. I


APPLICATION FILED MAR-17. 1908. 944,5 1 1 Patented Dee. 28, 1909.


I m M/V Q/ m w, m J I .arranged vertically or 'ing the the ship to cause it to incline,




Specification of Letters Patent. Patented Dec, 28, 1909,

Application filed March 17, 1908. Serial No. 421,668.

This invention relates to apparatus, for

minimizing the oscillatory movements of ships or other oscillating bodies, subjected to rolling or similar movements, of the type in which revolving bodies or fly wheels journaled in gimbal frames or supports are mounted in the ship, or other structure of which the movements are required to be con trolled; the object beingto provide means for regulating the braking effect automatically in accordance with the force of the waves (a) by influencing the strength of the braking by the amplitude of theoseillations of the revolving body or bodies (6) by influencing the strength of the braking by the angular velocity attained by the oscillations of the axle or axles of the revolving body or bodies (a) by regulating the strength of the braking by the couple incidental to the apparatus for preventing the rolling movement of the ship.

In a gyroscope with flywheel axle or shaft horizontally, rocking movements of the said axle always arise durrolling of the ship and their period should correspond as far as possible with the period of the roll of the ship in order to obtain as favorable an action as possible for preventing rolling movements. The amplitude of the rocking movementof the gyroscope axis depends mainly upon the magnitude, of the forces exerted by the waves upon- .or in other words theamplitude depends upon the size of the waves which the ship encounters. As is known, a braking device is therefore enfployed for maintaining a difference between the phases of the oscillations of the ship and the oscillations of the apparatus. The strength of the braking must, however be regulated in accordance with the violence of the sea, in order to prevent the oscillation period from being too small, or in other words to prevent the gyroscope from efl'ccting its oscillation too speedily and also in order to obviate an excessive amplitude of oscillation which might cause the aforesaid axle or shaft to assume an almost horizontal position, and likewise in order to maintain. as far as possible a given differenceof phase between the oscillations of the ship and those of the apparatus. As theavaves never act regularly and uniformly upon the vesseljor ship, experience has demonstrated that it is exceedingly difficult to regulate the strength of the braking by manual exertion, the result being generally unreliable.

For accomplishing the objects aimed at the present mechanism whereby the regulation of the force of the braking of the oscillatory movements of the axles of the revolving bodies or fly wheels takes place automatically as the result of a regulating device adapted to. be influenced by the amplitude of the oscilla tion of the said bodies; braking mechanism whereby the automatically acting regulating device is influenced by the magnitude of the angular velocity of the oscillation of the aforesaid bodies; and braking mechanism whereby the automatically acting regulating device is influenced by the n-iagnitude of the couple produced by the body or bodies and serving-"for dampin the rolling n'ioveinents of the ship or vess The braking may be effected by means of hydraulic, pneumatic, electric or friction devices, but hydraulic or friction devices will in most cases be found desirable or satisfactory in employment.

In the accompanying sheets of drawings:-l igure 1 is a central section of a braking mechanism with an automatically acting device for regulating the force of the brakin of the oscillatory movements of the axle o the fly wheel; the regulating device being influenced by the amplitude of the oscillation of the fly wheel all constructed and arranged in accordance with and embodying my invention. Fig. 2 illustrates, partly in section, a modification of the automatically acting regulating device. Fig. '3 shows a central section of a further modification of the automatically acting regulab invention comprises braking ing device adapted to be influenced by the ma itude of the angular velocity of the osclllation of-the fly Wheel. Fig. 4 is a sectional view according to the line III of 5 Fig. 3 and Fig. 5 a similar view according to the line III-IV of Fig. 3. Fig. 6 is a front view, partly in section, seen in the longitudinal direction of the ship of a gyroscope-apparatus provided with a modified 10 brake mechanism and also modified automatically acting regulating device, the latter adapted to be influenced by the magnitude of the couple produced by the fly Wheel and serving for damping the rolling movements 5 of the ship. Fig. 7 is a lateral or end view of Fig. 6, partly in section.

Similar letters and numerals of reference refer to like parts throughout the several figures.

Referring to Fig. 1, the strength of the braking may be regulated according to this invention by providing one of the, lateral trunnions c of the gyroscope-apparatus (not shown) with lateral horizontal arms or 5 levers it, ill adapted to carry pivoted rods 8, s the latter being respectively connected to' pistons is working in cylinders z 2 containing a quantity of Water or other appropriate liquid. The cylinders are in communication by Way of a passage a capable of regulation by avalve Z) so as to control the flow of liquid from the one cylinder to 'the case may be, is depressed during the working of the apparatus. The valve 6 may be of any suitable type-and is adapted for" automatic operation from another piston rod,"-

8 which is in connection with one of the aforesaid piston rods 8 or 8 40 In the exampleshown, a horizontal arm or lever (Z pivoted at l is provided near its left end with a slot 2 engaging a pin 3 of the piston rod .9 By the to-and-fro movements of the latter the arm (Z is rocked alternately up and down whereby suitable studs or projections 4 and 5 of the arm d engage alternately with corresponding tappets 6 and 7 of the piston rod 8 in order to lift the latter at each oscillation of the fiy Wheel accordingly. The piston rod 8 embracing the pivot or journal 1 of the arm ol by means of a suitable slot 9 may be rendered adjustable in length by a screwed link 20 or the like. The piston 10 pertaining to the rod 8 and being under the action of a spring 12 is arranged in a cylinder 11 which is itself contained in a tank or receptacle 14 containing.

Water or other appropriate liquid. The arrangement being such that, when the rod 8 is raised or lowered, as a result of the oscillatory movement of'the aforesaid trunnion c, the piston 10 Will act to permit water .to flow into or escape from the cylinder 11, a valve 13 being provided at the lower end of the cylinder 11 forthis purpose and another the other as the one or the other piston, as.

valve 15 being also provided for allowing of the escape of any excess of liquid. The spring 12 arranged in connection with' the piston 10 and cylinder 11 assists the return of the piston. The water or other liquid in the apparatus serves to retard or make more difficult the movements of the parts.

The-connection between the piston rod 8 and the valve stem 6 is efi'ected by a double armed lever 19 pivoted at 18. The slotted end 17 of this lever engages a stud 16 of the piston rod 8, while the other end of the lever.

19 is'suita-bly attached to the valve stem e..

The degree ofzopening the valve 6 may be rendered adjustable by means of a screw f or other suitable device. j According to the construction Shown by. Fig. 2 the trunnion 0 may carry a downwardly directed .arm 9 Which-may be fitted to a stud 2' pertaining to-aslide block at mounted in a slotted link 0 which connects two horizontal plunger pistons nand n working in corresponding cylinders p and p \Vhen the oscillations occur, Water is pumped from a reservoir 9 through pipes '90 I.

9*, 1' into a. cataract cylinder 25 so that the piston u therein and its rod 11 are forced upward. By means of an adjustable valve to, a certain quantity of water ispermitted to flow from the-cataract cylinder t to the said reservoir g, releasing the pressure beneath the piston u so that by means of a spring-m the piston and rod may be pressed down- -ward. The piston rod '0 then acts in a similar manner to that in the previously described construction, or in some other appropriate manner, on the regulating member pertaining to the brake cylinders, (for example on the valve 5 of Fig. 1), so that with an oscillation of the apparatusof large amplitude and consequently With' a large stroke of the pump piston, the force of the braking by the braking member is increased.

F or influencing the strength of the braking by the angular velocity attained by the oscillatory movement of the apparatus one of the trunnions 0 (Figs. 3-5) about which the apparatus rocks and which is mounted in a suitable bearing carries a toothed sector or quadrant 39 which engages with a spur wheel 40 ordinarily of smaller radius than the sector or quadrant. This spur wheel 40 may be formed or provided with a short cylindrical portion 41 and ismounted loosely upon a shaft 42 upon which is keyed a suitable fly Wheel45. The hollow portion 41 is provided interiorly with one, two or more pawls 43 adapted to' engage a ratchet Wheel 44 fast on' the shaft 12. Upon the apparatus being subjected to an oscillatory motion 125 and the quadrant '39 being consequently moved angularly the hollow cylinder 41 is also given a rotary movement according to the direction of the movement of the sector.

When the :cylinder or cup 41 is rotated in 9 the same direction as. the hand of a clock (Fig. the pawls 43 ride over the teeth of the ratchet wheel 44, but when the cup 41 is rotated in the direction of the arrow 7 (Figs. 4 and 5) the pawls 43 engage the ratchet 44 and impart a rotary movement to it and consequently to the fly Wheel 45 which is keyed on the sameshaft as the ratchet.

When the amplitude of the oscillation of the apparatus is small. so that it passes through the middle position with only a small velocity, the flywheel 45 is only rotated slowly; when on the other hand the apparatus rocks very vigorously and widely. the flywheel 45 must assume a relatively high speed of rotation. This difference in the speed of rotation may be utilized for producing the braking action upon the regulating member. \Vith this object either an appropriate centrifugal governor. a Silver marine governor or the like) may be provi led upon the shaft, or the shaft may l)ttt lllle(ffetl with a dynamo (not shown) the strength of the currentof which then alters with the number of revolutions and acts appropriately upon the regulating member. The manner in which the fluctuations in the angular velocity of the oscillations on the apparatus are utilized so as to act upon the braking. may vary as desired.

In the construction shown by Figs. 3-5

the tiy wheel 45 is acted upon only during,

the oscillatory movement of the quadrant 39 in the direction of the arrow 0. (Fig. 4). lat if it be desired to act upon the fly wheel 15 during the oscillatory return movement of the quad ;nt 39 in the direction of the arrow [3 (Fig: t). this may be accomplished by suitably arrau e'ilu a second hollow portion -t] (not shown) adapted to operate a econd ratchet by means of an intermediate wheel in the same direction as the first ratchet.

In order to avoid any risk of fracture of the teethwhen employing toothed gearing,-

owingto a sudden rockingmovement being imparted to the apparatus. a friction clutch may be provided. or instead of the toothed gearing. the pcrlphcr of the sector or quadrant and of the. ad 'accnt wheel may be forun-d for frictional cnga 'cmentby constructing' their contact surfaces of suitable character or material. Instead of the pawls, friction claws may be employed. if the mechanism herein referred to be made relatively strong" and the fly wheel of appropriate. weight it will be found that a direct damping" action will be. exerted upon the oscillatory movement of the gyroscope or apparatus and. in some cases. it will be found suitable for wholly or partly i.'e ')lacing' the bin-thing); mechanism.

Referring to Figs. ti and 7 showing a modified construction ofour inventionadapted to regulate the braking etl'ectby the couple produced by the apparatus and preventing rolling movements of the ship, the fly wheel or rotating body may be inclosed in a drum or a similar envelop y in order to avoid the effect of air resistance. The frame 25 may be fitted with step bearings 21 and 22 for the shaft 23 of the fly wheel the rotating of which maybe effected by means of an electric motor or other suitable mechanism contained in an appropriate support 24 attached to the frame 25. The trunnions c c where by the frame 25 and consequentlythe entire apparatus is supported and'which constitute a horizontal axis of oscillation or the jour nals of the frame are mounted in bearings 26. 27 which are arranged within frames 28, 2!) and yieldingly or elastically supported by means of adjustably mounted springs 30 or other convenient devices. in nuch a manner that they are capable of slight displacement in a down 'ard direction. Helical springs 30 may be employed in this connection, the tension of the said springs being rendered adjustable by means of screws or nuts 31. 32. Upon the couple being produced by the rocking of the apparatus about the trunnions c c and tending to rotate the apparatus to the left, that is to say with respect to Fig. 7 against the direction of a 'atchhand. the trunnion 26 will effect a slight depression of the bearing 26 and of the rod 33 or other connection connected with the said hearing; the displacement may be utilized for closing 01' opening in well known manner -the 'alve or slide of a hydraulic brake cylinder or for restricting the cross section of a passage (1- (Fig. 1) such as hereinbefore referred to. Moreover. the aforesaid rod 33 may be adapted to act upon a cataract connected with the slide of the brake cylinder in the known manner. When the couple is produced by the rocking of the apparatus in the opposite direction, the bearing 27 will be depressed by the trunnion c and the thereby displaced rod 34 actaccordingly upon the regulating device of the brake mechanism.

Obviously. the trunnion bearings may be supported otherwise than by means of the aforesaid helical springs as, for instance, by hydraulicyn pneumatic devices and it will be readily understood that the elastic or yielding bearings may also be rendered adjustable otherwise than by means of a screw nut. The hydraulic brake cylinders may also be dispensed with and be replaced by a friction brake (Figs. (1 and T) which may comprise a hemispherical friction ring 05 attached to the gyroscope or apparatus and arranged inconjunction with a friction block 36 yiehliugly mounted by means of springs 37 or equivalent devices in a suitable bearing cup 38. The strength of the spring pressure or of the elastic mounting may be rendered adjustable in any convenient manner. The action of this device is as follmvsz-JVhen trol the damping effect during the oscillaadvantage that "t example, pneumatic or electric braking, or frictional braking and also combinations of tions thereof; of means actuated from the owing to the couple .produced, oneof the truunions moves downwardly so that the apparatus sinks slightly the aforesaid friction ring comes into contact with the friction block or surface thereby braking the oscillations of the ap aratus. This presents the couple produced by the apparatus can not exceed a certain amount and thus any strain is prevented from being ut upon the parts. The friction ring may be arranged with its axis of rotation coinciding with that of the trunnions and may be constructed in any desired manner and of any desired or suitable material.

The above description relates principally to braking by means of hydraulic cylinders and the regulating members thereby required, and it would appear that hydraulic braking is preferable; any other methods and means of-braking may however be employed for the mechanism in question; for

the same and appropriate regulating memrs. We claim:

1. The combination with gyroscope mechanism and devices for damping the oscillations thereof; of means actuated from the gyroscope mechanism to regulate and contions.

2. The combination with gyroscope mechanism and devices for damping the oscillagyroscope mechanism to regulate the damping effect in accordance-with the degree of amplitude of the oscillations.

3. The combination with gyroscope mechanism and hydraulic devices for damping the oscillations thereof; of means actuated from the gyroscope mechanism to control the action of said hydraulic mechanism.

4. The combination with a gyroscope to control the cataract.

meclianism and a cataract pump operatively connected thereto; of a valve mechanism] controlled by the oscillation of the 5. The combination with a gyroscope mechanism; of a two-armed lever mounted on a trunnion thereof, a cataract pump comprising two cylinders and a by-pass connecting them, a piston in each cylinder and operatively connected to said lever, a valve to control said by-pass, and mechanism depending upon the amplitude of oscillation of the gyroscope to operate and control the valve. I

6. The combination with gyroscope mechanism; of a cataract pump having a bypass, said pump operated by the. gyroscope, a valve in said by-pass and a valve controlling cataract mechanism' dependent for its operation upon the oscillations of said gyroscope mechanism.

' 7. The combination with gyroscope mechthereto, a cataract pump comprising two cylinders connected by a by-pass,-pistons in said cylinders operatively connected to said lever, a valve in the by-pass, a single cataract cylinder, a receptacle around said cylinder, an inlet valve between said cylinder and receptacle, a vent for the cylinder into the receptacle, a loaded piston-in said cylinder, a piston rod connected to the cylinder, a lever for actuating the rod and operatively connected to a moving element of the cataract pump, and a pivoted lever connected to the valve and to the piston rod.

Signed at Hamburg in the German Empire this 24th day of February 1908.


IDA HAFERMANN. Signed at Newcastle-on-Tyne, this 27th day of February 1908.





gyroscope anism; of a two-armed lever connected

Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US3142181 *Jul 17, 1959Jul 28, 1964 Moller
US4193308 *Sep 27, 1976Mar 18, 1980Smith Dorsey TFluid dashpot gyro stabilized platform caging system
US6598492 *Nov 17, 2000Jul 29, 2003Wescam Sonoma Inc.Pneumatic caging system for gyro-stabilized sensor platforms
WO2009049371A1 *Oct 16, 2008Apr 23, 2009Halcyon Internat Pty LtdGyro-stabiliser
Cooperative ClassificationB63B39/04
European ClassificationB63B39/04