US1007183A

US1007183A - Screw-propeller.

Info

Publication number: US1007183A
Application number: US56250110A
Authority: US
Inventors: William H Clark
Original assignee: Individual
Current assignee: Individual
Priority date: 1910-05-20
Filing date: 1910-05-20
Publication date: 1911-10-31
Anticipated expiration: 1928-10-31

Description

W. H. CLARK.

SCREW PROPELLBR. I APPLIUATION FILED 111111120, 1910.

1,007,183. Patented 0111311911.

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3110c 1 1 foz Wdmeaoeo 1 W. H. CLARK.

SCREW PROPELLER.

APPLICATION FILED MAY 20. 1910. I

Patented 0013. 31, 1911.

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WILLIAM H. CLARK, 0F CLEVELAND, OHIO. I

SCBEW-PROPELLEB Specification of Letters Latent.

Patented Oct. 31, 1911.

Application filed they 20, 1910. Serial No. 562,501.

To all whom it may concern:

Be it known that I, WILLIAM H. CLARK, citizen of the United States, residing at Cleveland, in the county. of Cuyahoga and State of Ohio, have invented certain new and useful *Improvements "in Screw-Propellers, of which the following is a specificadirect propulsion in the line of flight, or it may be used for lifting purposes, when applied to flying machines.

An embodiment of the invention is illustrated in the accompanying drawings in which Figure 1 is a top or end view of the propeller. Fig. 2 is a side elevation thereof, partly broken away. Figs. 3, 4', 5 and 6 are details in plan and section of various parts to be hereinafter particularly described. Fig. 7 is an elevation of' a modification.

Referring specifically to the drawings, A indicates a driving shaft which turns in a bearing in a casting B and is geared by bevel wheels G to the propeller shaft D one end of which is stepped in a bearing in the angle casting B' which is mounted on a mem ber H of the frame. The other end of the ,shaft D is keyed to a hub or casting E having fourangular arms as'shown,- each arm conslstlng of. a radial member extending outwardly from the center and connected 'by an'elbow to an outer member at right angles thereto, these arms being arranged symmetrically around the center, the iadial member being indicated at 6 and the outer, member at 7, and all the armsbeing in the same plane. At the outer end of each radial member 6 is a guide pin F, and projecting outwardly from the end of the outer member 7 is a pivot rod G, which is rigid' with the arm. The propeller blades S are mounted to turn on the rods G, by clips T, and said rods serve to support a part of the thrust on .the blades, and the blades may be adjusted on said rods as axes to vary the inclination or angle of the blades'with'respectto the plane of the wheel. A bracket J is fastened to anotherpart of the frame H, and said bracket supports a bent lever K which is pivoted at its elbow to the bracket and is connected at its outer end to an operating rod R. The other arm of the lever has a pin and slot connection at 8 to a collar L which works in a groove in a sleeve M fast on one end of a tube N which incloses the; shaft D. Atits other end the tube is fastened to a casting O which has four radial arms projecting from the center thereof, and each arm has at the outer end an upri ht part which extends. parallel to the sha t and is slotted as at P,'and these slots receive the guide ins F so that the castings E and are/loo ed against relative rotation, but thecasting 0- may be moved lengthwise on the shaft. At the elbow of each arm 0 is a rod U extending radially, and parallel to the rods G, and the rods U have rollers Q thereon, which fit, under guidestraps V attached to the blades.

By operation of the'rod R and bent lever K the tube N and casting 0 attached thereto may be moved len wise on the propeller shaft, and when thls is done the rods U are moved to a position toward or from the rods G, and such movement, by means of the rollers Q and straps .V, turns the blades S on the pivot rods G, and so varies the angle pitch of' all the blades. As the head or casting O is moved toward the casting E the blades are. turned to decrease the angle thereof with respect to the plane of the wheel, and reversely, opposite motion increases it. Both the rods G and the rods U assist in supporting the thrust orv strain on the blades, and the construction provides a very light and convenient mechanism for effecting the result indicated.

Various modifications are possible within .the scope of the invention. Thus in the accompanying drawings four blades are illustrated, but the number'of blades may be varied as desired, and no limitation in this respect is implied. Furthermore, instead of having the pivot rods of the blades relatively fixed, and the shifting rods relatively movable, the construction may be reversed; that is, the tube N -and therods attached thereto may be relatively the shaft shiftable tomove the pivot rods toward or from the other rods, as shown in Fig. 7.

Having thus described the invention, what I claim as new, and desire to secure, by Letters Patent is 1. The combination of a propeller shaft, a hub thereon having outwardly projecting angular arms with ides thereon, blades pivotallyattached to the outer ends of said arms, a tubular member surrounding and slidable along the shaft and engaging the guides to prevent rotation of the member relative to the hub, and connections between said member and the blades to turn the latter on their pivots when the member 'is shifted along the shaft.

2. The combination of a propeller shaft, a hub fast thereto, pivot rods projecting outwardly from the hub, blades mounted to turn on said rods, a head slidable along the shaft,guides between the hub and head to glint)? 1&3

rojecting from the head, parallel to the pivot rods and connected to the blades, to turn the same on the pivot rods, and means to shift the head along the shaft.

3. The combination of a propeller shaft, a hub fixed thereon and having projecting guide pins, blades ivotally connected to said hub, a head slidable along the shaft 1 and having arms extending parallel to the shaft, said arms having slots in which the pins are engaged, to prevent relative rotation of the hub and head, and connections between the head and the blades to turn the latter on their pivots when the head is shifted along the shaft.

In testimony whereof, I do afiix my signature in presence of two witnesses.

WILLIAM H. CLARK. Witnesses:

HAnRrA. THoMrsoN, OAnLn'roN L. TERRY.