US818013A - Windmill. - Google Patents

Description

PATENTE) APR. 7 '1906,

'Noe 818,013.

R. s. BARTLETT.

WINDMILL.

APPLIUATION PILBDxooT.4.19o5.

2 SHEETS-SHEET 1.

PATENTE) APB.. 17, 1906.

R. S. BARTLBTT.

WINDMILL.

APPLICATION FILED 001211905.

2 SHEETS-SHEET 2,

wh/masas Nomils PETERS. INC.. Ln'hp.. WAsmNsTuN. D. C.

UNTTED STATES PATENT OFFICE.

-` `ROBERT S'. BARTLETT, 0F NOCONA, TEXAS. ,i

WINDMILL.

To (1N ich-0711' it may concern:

ABe it known that I, ROBERT S. BARTLETT,

av citizen l of the United States, residing at iN ocona, in the county of Montague and State of Texas, have invented certain new and useful Improvements in Yindmills, of-which the lwind-wheel produces a maximum velocity with a minimum of wind.

'ith this and other object-s in view the in'-l vention comprises, primarily. a peculiar construction of wind-wheel which is not proi vided with any vane and in which the blades are so constructed and arranged that the wind will act thereon to the best possible advantage. y

For a full description of the invention and the merits thereof and also toacquire a knowledge of the details of construction lof the means for effecting the result reference is to be had tothe following description and accompanying drawings, in which .A Figure l is a perspective view. Fig. 2 is a horizont-al section taken through the windwheel. Fig. 3 is a similar view taken through the 'tower structure just above theA bra-ke device.

Corresponding and like parts are referred to in the following description and indicated in all the views ofthe drawings by the same reference characters.

Referring' to the drawings, the referencenumeral 1 designates a suitable tower structure in which is mounted a vertical shaft 2,

designed to drive a pump ora-ny other de sired device. The 'upper end of the shaft 2 projects above the top of the tower, and upon said sha-ft is mounted my improved win'lwheel 3, which comprises lupper and lower horizont ally-disposed heads 4;, between which are rigidly secured a plurality of longitudinally-extending blades 5. The blades 5 are relatively narrow and do not extend with their inner edges to the center ofthe wheel, but are' of such `width that they provide within the wheel between the circle of the blades an open space or wind-chamber 6. In

' the present instan'ce'there are eight of these blades provided, and each blade has a concave-convex form m erom-section, as shown Specification of lI etters Patent.

I Application filed October 4, 1905. SerialvNo. 281,344i

Patented April' 1.7, 190e. i.

in Fig. 2. To properlylset this number' of blades and to insure that their cross-sections shall assume the proper form to secure the best results, two concentric circles are struck in the heads, the innermost circle indicating the transverse area of the interior air-space or windechamber before described. Then arcs arev struck from left to right, with the compasses set one-half the diameterof the wheel, said arcs beginning at the outside circle at t-he point it is desired the outer edge of' each blade shall come and touching the inside circle at the point where section-lines drawn through the two circles and dividing the saine into eight parts will cross the innermost circle. In other words, in laying the plan for the wheel the outer circumference ofl the wheel being determined said circumference will bel divided into eight parts for eight blades, said parts being designated by sec-tionlines passing through the center of the circle.

Where each of these lines cuts the outer circle the outer edge of the blade is intended to be located, and to determine the proper cross-sectional shape of each blade and the proper location for the inner edge thereof the compasses are, as before described', set a distance apart equal to one-qliiarter the diameter of the outer circle, so t at in striking from left to right the before-mentioned arc will be designated, beginning at the outside circle at thepoint where the sectional line crosses the same and passing across and in tersecting the inside circle where the next sectional line crosses the latter. The blades are then formed and set to'fit these arcs.

The shaft of the windmill is provided with suitable ball-bearings of other antifriction devices, so as to 'reduce friction as much as possible. At some convenient point within the tower structure thev latter is rovided with two cross-beams 7, t0 one ofw iich two corresponding brake-levers 8 are fulcrumed together by a hinge-joint or the like, the free ends of said brake-levers being secured Itogether by a rope or cable 8, designed to wind about a spindle 9, as shown, said spindle being provided with a hand-wheel 10 for the actuation thereof and being provided also with a ratchetand pawl l1. The brake-levers are provided,further, with concave cheeks 12 fitting around opposite sides of the drum 13, secured on the shaft 2, so that by manipulation of the spindle 9 said brake-levers may be brought together to bear upon said drum,

thereby constituting a 'brake for the shaft.

IOO

so. p

The paw] sarranged so that it may be disengaged from its ratchet by, any suitable means, so as to release the brake-levers when desired. The main feature of my invention resides 1n the peculiar construction and arrangement 0f the wind-wheel.- 'A

In the opera-tion of the device the blades of the Wind-wheel being constructed'and arranged as before described the wind may enter the Wheel from any point and start acting agalnst the Windward blades on their concave sides and then pass into the Windchamber-and inside the circle of the blades after acting upon the most leeward blades, and also will react on the opposite sides of the blades which were initially Windward ones. the circle of the lblades asin a' vortex and will drive the wheel with maximum velocity.

To arrive at a proper understanding ofthe advantageous results arising from the num'- ber and construction'of blades hereinbefore described, reference is to be particularly had to Fig. 2 of the drawings, which includes with the features of construction shown a diagrammatic portrayal which Lshall nowv describe. The space from A to"-B shows the volume ofwind as it strikes the wheel. Arrow N o'. 1 re resents the direction in which the wheel Wi 1 revolve, and arrow No.2 indicates the direction of the wind. The parl` ticular construction of blades produces by the curvature of said blades a shield that will throw off the wind that strikes the righthand side of the wheel; otherwise this wind would greatly retard the motion. The reference-letter X' indicates the oints from `which to the outer circle the bla 'es form the shield as the blades `come around to the righthand side of the wheel. D indicates by the dotted Yline the line to be drawn through the center yofthe wheel, beginnin at the outer edge of the blade a, then. touc 'ng the inner end of blade h, also the inner edge of blade d and the outer edge of blade e. Similar lines are drawn across the wheel, so that it is di vided into the eight sections, as beforel de scribed. Now the position of the blades laced on these sections lpartly -forms the shield before mentioned on the right-hand side of the wheel an'd also forms the opening In this manner the Wind acts within to receive the wind onthe left-hand side.

Furthermore, this same position of blades feeds the Wind received into the Wheel to the blades that are at the right-hand side and sistance on the right-hand side of the wheel Again, if the cur.-

and, retard the' motion. vature is greater than that, described with my invention it will-to some extent'choke the left-hand side of the wheel that receives the wind, thereby also retarding the motion and lessening the force or working power of the wheel.v The blades are individually distinguished from each other by reference-letters a b c d @fg It is of course to be understood that the wheel may be made of anyI length and diameter.

Having thus described the invention, what is claimed as new is- A wind-wheel comprising spaced-apart heads, a circular series of transversely-curved vblades secured to said heads and heldtherebetween, the outer edges of said blades being arranged in a circle `and the inner edges of saidsblades being also arranged in an inner vcircle which forms' a wind-chamber at the 'center of thewheel, the inner edge of each curved blade being located at a point where' a line drawn therethrough and through the center of the Wheel will intersect the. outer edge of the next blade in advance, and each of said bladesl being concavo-conveX in crosssection, the cross-sect1on thereof lying 1n an arc struck from the outer circle of the wheel to the inner circle forming the Wind-chamber,

the radius of said arc being e ual to onequarter vthe diameter of the whee In testimony whereof I alix my signaturel in presence of two Witnesses.

ROBERT S. BARTLETT.

Witnesses: v

vV. Y..WooD,

C. A. MORRIS

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