US1512222A - Follow-up mechanism - Google Patents

Description

H. C. HAYES FOLQOW-UP MECHANISM- F'iled Jan. 2 1924 Fly] Patented Oct. 21, 192%.

entree stars HARVEY c. nevus, or wasnmeron, ms'rnicr or conunnara.

rorLow-ur MECHANISM.

. application filed January 2, 1924. Serial No. 684,091. 1

To all whom it may concern:

Be it known that I, HARVEY C. HAYES, a citizen ofthe United States, and resident of Washington, District of Columbia, have 6 invented certain new and useful Improvements in a Follow-Up Mechanism, of which the following is a specification.

My invention relates to a means whereby the established position between two mov- 10 able members may be maintained. 4

An object of the invention is to maintain a relative position between two rotatable members without the introduction of reacting torque. W

A further object isto provide a mechanism as described that will be simple in construction and reliable in operation.

, With the above and other objects in view the invention consists in the construction, 20 combination and arrangement of parts as will be hereinafter described.

Reference is to be had to the accompanying drawings in which like reference characters indicate corresponding parts throughas out the several views, and in which-'- Figure-l is a vertical sectional view, and 'Figure 2 is a view on the line 2-2 of Fi re 1. a an example I have shown and will de so scribe my invention as applied to a gyrocompass, although it will be understood that I do not limit myself to this particular application, as this mechanism may be used in connection with various devices. 85 Referring to the drawings,1 and 2 indicate the gyro-wheel and supporting frame respectively of av gyro-compass and?) and 4 the bearings about which the frame can turn on a vertical axis. Bearing 4 is hollow to so that a stream of fluid can be forced throu h it into a T-shaped member 5 support by frame 2 and having two outlets 6 and 7. The fluid emerging from these A outlets passes respectively into s lit nozzles cc 8 and 9, which direct t e flui stream to veins of two small'turbine wheels 10 and 11. These turbines each operate a small Hinion wheel 11 and 12 through worm rives 13 and 14. The pinion wheels engage as in a circular rack 15 and are carried by a member 16 rotatable on bearing 17.

' When outlets 6 and 7 of the member 5 are directly opposite split nozzles 8 and 9, the

fluid stream is accurately divided so that half emerges from each branch and under such conditions the two turbines will remain at rest, as the reaction of each branch is the same but in opposite senses with respect to turbine rotation. If the supporting frame is rotated slightly in a clockwise direction, the branch nozzles 8 and 9 will no longer equally divide the fluid stream ,issuof one will ca more of the fluid than will thfl upper, the upper branch of the other Wlll carry more than the lower branch. This will cause the two turbines 10 and 11 to rotate in an anti-clockwise direction and the pitch of the worm drives 13 and 14 is such that the action of pinion wheels 11 and 12 cause member 16, which carries both turbines and both nozzles to be rotated in a from member 5, but the lower branch 7 clockwise direction about bearing 17. This motion will continue until the nozzles 8 and 9 are again brought opposite the outlets 6 and 7 The action, of course, will be the reverse if the frame is rotated in an anticlockwise direction. It will, therefore, be

seen that however frame 2 is rotated aboutthe vertical axis, member 16 will, through the action I of the two turbines operated through the split nozzles, be caused to folbe along a, line making an angle of 45 with. the vertical axis but interse'ctin with it. torque tending to rotate,the frame about its .vertical axis but will introduce a side thrust on bearings 8 and 4. While closing one of the outlets does not afl'ect the accuracy or sensitiveness of operation to any greatextent, it is desirable to use both outlets. I

It will be understood that the above de scription and accompanying drawings comprehend only the general and referred embodiment of my invention an that various This reaction will not intr uce a minor changes in details of construction,

proportion and arrangement of parts may be made within the scope of the appended claims and Without sacrificing any of the advantages of my invention. V

Having described my invention, I claim: 1. In a follow-up mechanism, a movable member, a fluid stream conductor having a plurality of outlets carried thereby, systems of gearing, a rotatable member, and means deriving motion from said fluid stream for fluid stream for imparting motion to said.

rotatable member through the gearing.

3. In a follow-up mechanism, a member movable on an axis, a member rotatable in a plane at right angles thereto, systems of gearing, and co-acting fluid stream means carried by the respective members and directing a fluid stream against said gearing to cause relative movement of said members through action of said earing.

4. In a follow-up mec anism, a member movable on an axis, amember rotatable in a plane at right angles thereto, a stationary rack adjacent to the periphery of said'rotatable-member, a fluid stream conductor having a plurality of outlets carried by the movable member, split nozzles carried by the rotatable member, revolvable means carried by the rotatable member and co-acting with the conductor through said split nozzles, said means being rotated by a fluid stream passed therethrough, and means carried by the rotatable member and engaging with the rack and the revolvable means whereby movement isv imparted to said rotatable member upon movement of said revolvable means.

5. In a follow-up mechanism, a freely movable member, a fluid stream conductor imparting motion to said rotatable member.

' HARVEY O. HAYES.

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