US1755124A - Airplane control stick - Google Patents

Description

April 15, 1930. MADORIE 1,755,124

AIRPLANE CONTROLVSTYICK Filed May 22. 1929 2 Sheets-Sheet 1 Till" I I m INVENTOR ATTORNEY April 3 o. H. MADORIE 1,755,124

AIRPLANE CONTROL STICK Filed May 22, 1929 v 2 Sheets-Sheet 2 ATTORNEY v 35 plane.

Patented Apr. 15, 1930 UNITED STATES A PATENT orri cs OTTO H. HADORIELDF MARSHALL, MISSOURI AIRPLANE con'rnor. smrci;

Application filed Kay 22, l

- universal pivotal movement,,-whereby the ailerons and the'elevator of .an airplane may be conveniently controlled.

Another object of the invention is the provision of a controlling stick'mounting which has been reduced to a minimum. number of parts, so as to provide for simplicity, stability and'lightness of construction, features which are especially desirable in the construction of airplanes.

i Another object of the invention is the provision of an adjustable counterbalance for the stick, which ma be adjusted in accord anceywith the pull 0 the ailerons and the elevator, so that the stick may be easily manipulatedand will automatically assume a neutral position in the event of its release by the aviator. l

With the above and. other objects in view, the invention further includes the following '25 novel featuresand details of construction,- to

be hereinafter more fully described, illustrated in the accompanyin drawings and pointed out in the appende claims. In the drawings Figure 1 .is a skeleton\.'perspective view illustrating a control stick constructed and" mounted in accordance with the present in--. vention and shown connected for the'control of the ailerons and'the elevator of an air- Figure 2 is a fragmentary side'elevation. Figure 3 is a top plan view. Figure 4 is a section taken substantially on the line 4-4 of Figure 3. v Figure 5 is an enlarged fragmentary sectional Eview taken substantially-on the-line 5.5 of Figure 3 with arts in section.

Referring to the drawings in detail wherein like characters of reference denote corre sponding parts, the reference character 10 indicates asupporting frame which is adapted to bemounted rigid with the frame of the airplane. This frame 10 supports a shaft 11 which is disposed transversely of the air- 5 0 plane and which has mounted thereon a 1929. Serial No. 865,135.

sleeve 12. This sleeve is capable of rocking movement upon the shaft 11 and is held against a xial movement by means of collars 13 which areadjustably secured to the shaft by means of set screws 14, The control stick is indicated at l5-and is provided intermediate its ends with an offset portion 16. In addition, the stick 15 has secured thereto a' substantially U-shaped strap 17 whose ends are/secured to the stick adjacent the ends' of the ofi'set portion 16, by means of bolts v18. A rectangular frame is thus provided in the stick through which-the. sleeve 12 asses.

Extend ng diametrically f rom the sleeve 12 are bosses 19'. These bosses abut the 0p osed' faces of the frame whichis formed ythe offset portion .16 and the strap 1'2. Trun-nions 20 provide a pivotal connection between the stick frame and the sleeve12, the trunnions consisting of bolts having relatively .lar e smooth bearin portions upon which the lame may be 'roc ed and thread ed ortions which enter the bosses 19.

rom theforegoing description and accompanyingdrawin s it will be seen that the stick 15 is capableo universalpivotalmovement.

In Figure 1 of the drawings, the ailerons of an airplane are indicated at 21 and these ailerons are connected to'the stick 15 above and below the ivotal mountin of the stick by means of ca les 22, so that w enthe stick is rocked laterally, the ailerons willbe moved pivotally. In.addition,thestick is connected as to an elevator 23 by meansof cables 24 which are also connected to the stick above" and be-' low itspoint of'pivotal mounting, so that when the stick is rocked forward or rearward, the elevator will be adjusted for ascent or descent.

Mounted upon the stick 15 below its point of pivotal mounting is a weight 25. This weight is adjustablly secured upon the stick by means of a bin 1 erly adjusting the weight upon the, stic the latter may be balanced with respect to the ailerons and elevator, so that in the eventthe aviator releases his hold upon the stick, the latter will assume a neutral position with :10

ng screw 26. Byrop- "us the ailerons and elevator neutral. This action will materially aid in the safety of the airplane.

he invention is susceptible of varlous changes in its form, proportions and minor details of construction and the right is herein reserved to make such changes as properly fall within the scopeof the appended claims. Having described the invention what is claimed 1s:-

1. In a control stick for airplanes, a shaft disposed transversely of the airplane, a sleeve mounted for rocking movement upon the shaft, a control stick, an offset portion provided in said stick, a substantially U- shaped strap having its opposite ends secured to the stick at the ends of the offset portion and cooperating with the latter to provide a frame for the passage of the sleeve, means to pivotally secure the stick frame to diametrically opposite sides of thefisleeve and means to connect the stick with the ailerons and elevator of the airplane.

' 2.;In a control stlck for airplanes, a sta I tionar supporting frame, a shaft secured in,

said 'ame, a sleeve mounted for rocking movement upon the shaft, a control stick, an ofi'set portion provided in said stick, a substantially U,-shaped strap having its opposite ends removabl secured-to the stick at the ends of the 0 set portion and cooperating with the latter to provide a frame for the passage of the'sleeve, headed trunnions extending through and having hearings in said frame and threadedly engaging the-sleeve to pivotally secure the stick frame to diametrically opposite sides of the sleeve, and means to connect the stickwith the ailerons and elevatorof the airplane. i

40 In testimony whereof I aifix my signature.

,. o'r'ro H. MADORIE.

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