US36217A - Improvement in brakes for wind-wheels - Google Patents

Description

my invention applied to it.

NITED STATES .ATENT OFFICE.

D. WV. HUNT, OF SAN FRANCISCO, CALIFORNIA.

iIVIPROVEMENT IN BRAKES FOR WIND-WHEELS.

Specification forming part of Letters Patent Nov 36,2 E '7, dated August 19, 1862. v i

and I do hereby declare that the following is a full, clear, and exact description of the same, reference being had to the accompanying drawings, making a part of this specification, in which- Figure 1 is an elevation ofa wind-wheel with Fig. 2 is a verti cal section of the same taken in the line 00 m, Fig. 1. Fig. 3 is a section of the same taken in the line yy, Fig. 1, and showing a face view of the hub of the wheel. Fig. 4 is a section of Fig. 3, taken in the line .2 a. Fig. 5 is an enlarged section of Fig. 2, taken in the line z'z. Fig. 6 isa sect-ion of Fig. 5, taken in the line y. Fig. 7 is an enlarged section of Fig. 2, taken in the line 2 .2. Fig. 8 is a section of Fig. 7, taken in the line a 2'.

Similar letters of reference indicatecorresponding parts in the several figures.

This invention consists in a novel way of ap plying a brake to a wind-wheel, as hereinafter fully shown and described, whereby the speed of the'wheel may be regulated as desired without having the brake mechanism at all interfere with the operation of the wind-wheel either as regards its rotation or its shifting position which keeps it in the face of the wind.

The invention also consists, in connect-ion with the foregoing, in the employment or use of flanges or. ribs attached to the fans, for the purpose hereinafter described.

The invention is more especially designed to be applied to wind wheels for pumping water; but it may be advantageously applied when other than pump machinery is operated.

To enable those skilled in the art to fully understand and construct myinvention I will proceed to describe it.

A represents a framing, which may be constructed in any proper way to support an upright tube, B, in the upper part of which a crane, O, is placed. This crane is formed of an upright bar, at, having a horizontal bar, I), at its upper end, on which the bearings c c of a horizontal shaft, D, are placed. The lower part of the upright bar a has a tubular projection, a which is fitted in a step, d, in the tube B, and is allowed to rotate freely in said step. The horizontal bar I) of the crane is above the tube B, as shown clearly in Fig. 1,

and on the outer end ofthe shaft D there is a hub, E, which is provided at its'periphery with oblique flanges e, to which the fans F of the wind-wheel are bolted, the oblique position of the flanges giving the properobliquity 'to the fans, as will be seen by referring to Fig.

1. The backs of the fans F are provided with longitudinal flanges or ribs f, which project centrally from the fans at right angles and serve to stiffen them. The fans may be of wood or metal. The principal feature of the ribsf will be hereinafter described.

On the inner end of the shaft D there is placed a crank-pulley, G, to which a connecting-rod, H, is attached at any distance from its center according to the length of stroke required. This connecting-rod is formed of two parts of about, equal length, connected by a pivot, e, and the lower end of the connectingrod is connected to a piston-rod, I, by a swivel, J. (Shown in Figs. 7 and 8.) The piston K of the rod I works in the lower part .of the tube 13, through which water is raised by the operation of the piston.

The crane 0 being allowed to turn freely in the upper part of the tube B, it will be seen that the windwheel may also turn to face the wind without at all affecting the connectingrod H, as the latter is connected to the pistonrod I by a swivel, J. The connecting-rod H passes through the tubular projection a at the lower part of the crane C, said projection serving as a guide for the connecting-rod. The

lower part of the connecting-rod H is of square or rectangular form, and upon it there is placed a collar, K, in which the connecting-rod is allowed to work freely up and down. The collar K is encompassed by a clamp, L, which is fitted in a groove,f, made circumferentially in the collar, as shown clearly in Fig. 6. This clamp L is connected by pivots or trunnions g g to a lever, M, the fulcrum h of which passes through ears z, attachedto tube B. This lever M is connected by a rod, j, to a lever, N, the ful crum-pin k of which passes through the tube B. The lever N may be secured in a more or less elevated position by a vertical rack, O,

which is attached to the base of the framing A, and into which the lever N catches.

The crank-pulley G is grooved circumfere'm tially at its periphery to receive a metal strap, 1?, one end of which is attached to the upright bar a of the crane 0, the opposite end of said strap extending down and being connected to the upper part of the collar, K. The strap P, it will be seen, does not interfere in the least with the shifting or turning of the wind-wheel with the changing of the wind, and the strap P may bemade to bear on the periphery of the crank-pulley G with a greater or less pressure by adjusting the lever N, and the speed of the wind-wheel regulated as desired and stopped when necessary or required, the collar K, turning i n the clamp L, whilethelatter,through the medium ofleverM, rod 3', and lever M, may

' be raised and lowered for adjusting strap 1?.

The flanges or ribs f, attached to the fans F, serve as regulators and prevent an undue velocity of the wind-wheel in a high wind, as they offer a resistance to the air, which increases in proportion to the square of their velocity. Hence the flanges or ribs will not materially affect the power of thewheel in a light wind and will add greatly in checking it during a high wind.

I do not claim, broadly, a brake formed of a metal friction-strap irrespective of the arrangement of the same and the mode of application herein shown and described; but

being used in combination with a revolving crane, O, and the swivel J, which connects the rods H H, substantially as and for the purpose H set forth.

2. In combination with the foregoing, the flanges or ribs f, attached to the back parts of the fans F, to operate as and for the purpose specified. t

D. WV. HUNT.

\Vitnesses:

E. O. HUNT, JAS. B. WEBSTER.

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