Nov. 19, 1946. w. 1. JACKSON AIRCRAFT PROPELLER Filed Aug. 26, 1945 2,411,271 Patented Nov. 19, 1946 2,411,271 UNITED STATES “ ' j. a , ’ PATE‘NT“ OFFICE ‘; ‘ _".2,41‘1V-,2"11 " ‘ ‘ ‘ 1 1 ' H 1 ' <7 I AIRCRAFT PRoPELLER ‘‘ I William I. Jackson, Orange, Calif.’ Application August 26, 1943, Serial No. 500,083 2 Claims. (Cl. 170-168) 1 2 My invention relates to a propeller for aircraft such as airplanes, helicopters, dirigibles and the Formed integral with and projecting inwardly from rim I2, midway between its front and rear edges, is a web or flange I3 and the outer ends of blades H are formed integral with this web and with rim I2 by means of outer walls I14, which connect the outer ends of said blades with said rim and inner walls I5 which connect the blades, like, and the principal object of my invention is, to provide a propeller which in structure, com bines fan blades and a ring or rim having air passageways, in order to develop extremely high pulling or lifting power when rotated at high speed. inwardly from walls I4, with the inner portion A further object of my invention is to provide of web I3. These walls I4 and I5 are disposed transverse a propeller of the character referred to, wherein 10 ly of the blades II and formed through web I3 the blades or vanes, in addition to being inclined in cross section, are inclined lengthwise so their between said walls, and beneath the outer end of each blade is an air passageway such as IS. inner ends, which are connected to a hub, are positioned forwardly of the outer ends of said Formed through Web between the openings Iii blade and the rim or ring to which said outer ends 15 are similar openings to provide air passageways ‘ I7, and overlying each of said passageways is an are connected. integral plate or wall I8, which is inclined length Further objects of my invention are, to con struct the propeller in a single piece, by casting wise to correspond with the transverse inclina tion of the blades II. methods or otherwise, and to embed in the periphery of the rim or ring portion of the pro 20 Connecting the inside edges of the inclined plates I8 with web I5 along the inner edges of peller, a member such as a steel cable, in order the openings I1 are integral walls I9, and the to counteract and resist bursting strains when thep-ropeller is rotated at high speeds.‘ outer edges of said inclined plates are integrally With the foregoing and other objects in View, connected to the inner face of rim I2 (see Fig. 5). my invention consists of certain novel features of 25 During operation the propeller is, rotated at high speed, and those portions of the blades in construction and arrangement of parts, which wardly from the rim will function in the usual will be hereinafter more fully described and manner and force a heavy column of air rear claimed and illustrated in the accompanying drawing, in which; Fig. 1 is a front elevation of the propeller. Fig. 2 is a plan view. ~ wardly through the rim or ring. At the same time 30 the outer ends of the blades which are inclined, 1 Fig. 3 is an enlarged cross section taken on the line 3-3 of Fig. 1. Fig. 4 is an enlarged section taken on the line ' and the inclined plates I8, will force air through openings I5 and I‘! in the rim so as to produce a tubular column of air surrounding the column - driven rearwardly by the inner portions of the 4-4 of Fig. 1. 36 blades, thus producing a high degree of pulling or lifting force upon the aircraft with which the pro Fig. 5 is an enlarged cross section taken on the peller is associated. line 5--5 of Fig. 1. To reinforce the rim portion of the propeller Fig. 6 is a cross section of the peripheral rim and provide resistance to bursting strains de of the propeller and showing a reinforcement therefor. ' 40 veloped while said propeller is rotated at high Referring by numerals to the accompanying speeds, a member, preferably a steel cable such drawing which illustrates a preferred embodi ment of my invention, I0 designates a hub, with which is formed integral, the inner ends of a plu rality of radial blades II which are correspond ingly inclined in cross section, also inclined lengthwise so that their outer ends occupy a plane rearwardly of their inner ends and the hub. Thus the propeller is substantially dish shape, ‘ with its convex face or side forwardly presented. The rim or ring which ‘connects the outer ends of the blades includes a peripheral rim number I2, which is substantially lozenge shape in cross sec tion with smooth convex faces and fairly sharp front and rear edges, thus providing a stream 55 lined effect. as C, may be embedded in the rim member I2 (see . Fig. 6). Where larger sizes of my improved propeller are built for use on large helicopters, said pro pellers may take the shape of an umbrella or par achute and reinforced by guy rods or wires ex tending from the hub to the outer portion’ of the rim. Propellers constructed in accordance with my invention, and in smaller sizes, may be advan tageously employed for the propulsion of boats, also in rotary pumps, compressors, impellers and the like. Thus it will be seen that I have provided a pro peller which is simple in structure, inexpensive of 2,411,271 4 3 manufacture and very effective in performing the functions for which it is intended. It will be understood that minor changes in the size, form and. construction of my improved propeller may be made and substituted for those herein shown and described without departing from the spirit of my invention, the scope of which isset'forth in the appended-claims‘. I claim as my vinvention: - A, outer ends of said blades, which ring is lozenge shape in cross section and being o?set rearward ly from said hub, a continuous ?ange projecting inwardly from said ring between its front and rear ends, the inner edge of which ?ange is se cured to said blades inwardly from their ends, and there being spaced openings formed in said ?ange-a I ' . ' ‘ a , > *2. An airplane propeller as set forth'in claim 1, 1. In an airplane propeller, a hub, a series of 10 with inclined plates integral with said ?ange in front of the openings therein. WILLIAM I. JACKSON. blades are inclined lengthwise and in cross see blades projecting radially from said hub, which tion, a peripheral ring integrally connected to the ' '