US1468772A - Vertical-control device for airplanes - Google Patents

Description

Sept. 25 1923. 7 1,465??? B. w BLOOMQUIST VERTICAL CONTROL DEVICE FOR AIRPLANES 0 Filed Sent. 25 1922 3 49 49% a? 3 55 5% 34- 36 2 as s 37 49 29 39 55 I INVENTOR 42 E 5 fiernkardi WBZoomgal'si Byr I ATTORNEY Patented Sept. 25, 1323.

BMNHARDT W. BLOOMQUIST, 01F SEATTLE,

VERTICAL-CONTROL DEVICE FOR AIRPLANES.

Application filed September 25, 1922. Serial We. 590,338.

To all whom it may concemh I Be it known that I, BERNHARIYI W. BLOOMQUIST, a citizen of no country, and a native of Finland, having legally declared my intentions of becoming a citizen of the United States, and residing at Seattle, in the county of King and State of Washington, have invented a new and useful Vertical- Control Device fdr Airplanes, of which the following is a specification. I

This invention relates to vertical control devices for airplanes and the principal object of the invention is to provide a vertical control comprising prope lers arranged to lift the airplanevertically from the ground. Another object is to fprovide automatic means whereby the slant 0 the blades may be regulated to increase or decrease the lifting power of said propellers at all times. further object is to provide a relatively large overhead wing surface symmetrically disposed above the center of gravity of the machine body and adapted to serve as a parachute while descending.

With the above and other objects in view which will appear as the description proceeds, the invention consists of the novel construction, adaptation, arrangement and combination of parts hereinafter described and claimed.

objects are accomplished by devices illustrated in the accompanying drawings wherein- Figure 1 is a top plan view of the device;

Fig. 2 is a view in side elevation with certain parts broken away;

Fig. 3 is a view in transverse vertical sectiontaken substantially on a broken line 3, 3 of Fig. 1; and

Fig. 4 is a fragmentary top plan view of the reciprocating track members and associated arts.

Referring to the drawings, throughout which like reference numerals designate like parts, the numeral 5 designates the body of an airplane having a propeller 6 driven by an engine partly shown at 7 for going ahead. The numeral 8-designates the overhead wing which is secured to said body by stay rods 9, while the numeral 10 indicates the rudder and the numeral 11 indicates a deck or floor- An engine 12, shown in outline, is centrally mounted on the flooring 11 and a horizontal propeller shaft 13 extending forward and aft from said engine is mounted in bearings 14 and 15 adjacent the outer end ortions thereof. Bevel gear wheels 16 an 17,

secured to the outer ends of said shaft, mesh with smaller gears 18 and 19 secured to vertical shafts 20 and 21.

The vertical shafts 20 and 21 are secured at their lower ends in ball bearin 22' and 23 fastened to the flooring 11.

of the body 5, serve as bearings for said vertical shafts and ball bearings 26 and 27, bearing upwardly thereagainst, support the Wei ht of said body.

ubs 28 .and 29 are fixedly secured to the upper ends of the shafts 20 and 21 and spokes 30 and 31 have their inner ends secured thereto in spaced apart radial relation and ransverse members 24 and'25, secured across the top The inner ends of said blades terminate short of said hubs and are beveled as clearly shown in Fig, 1 of the drawings, and rollers 38 and 39 are operatively secured to the'iinderside corners thereof for reasons presently set forth.

Standards are provided in transverse alignment with the'shafts 20 and 21 comprising uprights 40 and 41 joined to ether by straps 42' extending around the un erside of the body 5. Said standards converge upwardly and are bifurcated at their u per end portions to form arms a3 and 4:4. aid arms are curved inwardly and their end portions are further bifurcated to form pairs of upright fingers 4:5 and 46.- Webs 47 join said. arms to central ball bearings 48 through which said vertical shafts pass thus serving to retain same in upright alignment.

Each pair of fingers 45 and 46 serves as supporting bearings for outer track members dQ'and also for inner track members 50 telescopically mounted therein. Said outer track members are provided with diametrically opposite depending rods 51, while said inner track more ers are rovided with corresponding rods 52. Sai rods are di osed in transverse ali out with th she. ts 20 and 21,\and upright standard members e0 and 41. The lower ends of said rods are pivotally secured to levers 53 and 54 extending through and pivotally secured within apertures provided in said upright standard members as clearly shown in Fig. 3.

The rollers 38 are arranged to engage the outer track members 49 while the rollers 39. engage the inner track members 50 and it will be obvious that by operatin the levers 53 and 54; simultaneously vertica reciprocal motion will be communicated through said track members to said rollers and will cause the propeller blades 36 and 37 to assume any pitch which may be desired in causing the machine to climb vertically from the ound. It will be understood that the machine is pellers, although same may be geared to a single engine both for going ahead and climbing.

Although not shown in the drawings, it is intended in practice to connect both pairs of levers 53 and 54 to a single control rod in any suitable manner and so arranged that the pilot or engineer may manually regulate the pitch of the overhead propeller blades, by hand or by foot, from a central or other convenient position.

While the foregoing description taken in connection with the accompanying drawings is intended merel for illustration, it will be obvious, when t e device is built in the properproportions, that the machine will lift itselfvertically from the ground, and, in conjunction with the engine and propeller for oing ahead, may be maneuvered at will. In act the perfect control of the pitch of the propeller blades will enable the machine to stand still in the air, while the parachute arrangement of the overhead wing surface will enable same to descend vertically to the ground.

Having thus described my device, it being understood that such changes may be resorted to as are within the scope and spirit of the invention, what I claim and desire to secure by Letters Patent is In combination with the body of an airplane of a vertical control device cc mprising a relatively large wing surface symmetricall secured above said body, a horizontal shaft mounted within said body, driving means for said shaft, vertical shafts geared to said horizontal shaft, anti-friction bearings for said shafts, hubs secured to the upper ends of said vertical shafts, spokes radi-. ally secured to said hubs in the plane of said wing surface, rims secured to the outer ends of said spokes within annular apertures in said win surface, roller bearings for said rims, prope ler blades pivotally mounted on said spokes, said blades havin beveled inner ends terminatin short of said hubs, standards having bifurcated arms and fingers, outer and inner annular track members telescopically mounted in said standards, rollers secured to the inner corners of said propeller blades adapted to enga e said track members, and lever means a apted to impart reciprocal movement to said track members to regulate the pitch of said propeller blades.

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