US1190149A - Aerial propeller. - Google Patents

Description

F. R. GOLDER.

I AERIAL PROPELLER. APPLICATION FILEDZSEPTJI, 1915.

1 1 90, 1 49. Patented July 4, 1916.

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AERIAL PROPELLEB.

Specification of LettersPatent.

Patented July 4., 1916.

Application filed September 11', 1915. I Serial No. 50,245.

To all whom it may concern:

Be it known that I, FRED R. GOLDER, a citizen of the United States, residing at Chicago, in the county of Cook and State of Illinois, have invented new and useful Improvements in Aerial Propellers, of which the following is a specification.

My invention relates to aerial propellers, and is designed to provide a novel, eflicient and reliable type of propeller for flying machines, dirigible balloons, aerohydropla-nes, flying bodies, and similar craft employing propellers to act upon the air. v

The primary object of the invention is to provide a propeller which will act upon a column of condensed and concentrated air, whereby greater thrust pressure and proelling efliciency is obtained.

A further object of the invention is to pro? vide an aerial propeller embodying an inclosed propeller proper of the spiral bladed type, together with means for forcing a confined column of air under pressure against the propeller, by which a reaction is obtained against a condensed body of air to secure a greater driving or lifting impulse, while reducing slippage to the minimum.

The invention consists of the features of construction, combination and arrangement of parts herein had to the accompanying drawing in which Figure 1 is a side elevation of an aerial propeller embodying my invention. Fig. 2 is a vertical longitudinal section of the-same. Fig. 3 is a vertical transverse section on line 33 of Fig. 1. Fig. 4 is a vertical transverse section on line 4-4 of Fig. 1. Fig. 5 is a 'view similar, to Fig. 2 disclosing the slightly modified structure.

In carrying my invention into ractice, I provide a casing 1, preferably cyhndrical in form, and within which is arranged a rotary fan or blower 2, the blades of which are mounted upon a longitudinally extendin shaft 3. The forward portion of this sha is provided with a pulley 4: or other means for the transmission of power to the drive fan or blower from a suitable power plant.

Communicating with the rear side of the casing 1 is. a cylinder or air tunnel 5, which is open at both ends, and communicates at its forward end with the interior of the casing, so that the air drawn into the casing and compressed by the action of the fan will be forced rearwardly in the form of a confully described and claimed, 3

densed column ofair through the cylinder 5, and discharged into the atmosphere at the rear end thereof. a 5

p Extending longitudinally through the casing is a shaft 6, which is coupled to the shaft 3 in any suitable manner, as shown at 7. This shaft 6, as illustrated in Figs. 1 to 4, inclusive, is journaled to rotatewithin bearings 8 in the cylinder and receives driving motion from the shaft 3, the casing and cylinder being held stationary or fixed against motion when applied for use. The shaft 6 carries a plurality of spiral vanes or blades 9, which will act upon the column of air forced through the cylinder 5, whereby the air is condensed to a greater degree and the blades caused to work with a screw-like motion against a bank of highly compressed air, sov that a maximum thrust action is obtained.

It will of course be understood that the propeller may be employed either as a driving propeller or lifting propeller, and is arranged horizontally or vertically according to its intended purpose in these particulars. Its principal advantage in operation is, that the spiral propeller blades act upon a column of air initially compressed and held confined, and further compressed by the'spiral blades, by which the blades are caused to act upon a localized area of air of great density and to that much greater efficiency is secured than can be obtained by the action of a propeller upon free air. It will of course be under; stood that the helical or spiral vanes or blades may be of any predetermined radius and pitch according to the size of'blower and power available, and that in the operation of the propeller the air is discharged velocity in the path of a true with great whereby an additravel upon a spiral thread of banked alr, so

the cylinder to revolve therewith. Both structures, and others equivalent thereto, are held to fall within the spirit and scope of my invention.

An aerial propeller ,comprising a blower casing, a cylinder ofless diameter than said casing and communicating at one end therewith, a shaft within the blower casing, angularly disposed blades secured to said shaft and forming a rotary blower of the same diameter as the casing and operating therein, a longitudinal shaft extending through the cylinder and connected with the first-named shaft, and spiral blades within the cylinder 10 and connected with said longitudinal shaft,

said blades forming a spiral propeller of a diameter conforming to the interior of the cylinder.

In testimony whereof I aflix my signature in presence of two witnesses.

FRED R. GOLDER.

Witnesses:

SoRnN MATHrsoN, CHAS. F. BUSHONG.

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