US702161A

US702161A - Windmill.

Info

Publication number: US702161A
Application number: US6663201A
Authority: US
Inventors: Gilbert B Snow
Original assignee: ELGIN WIND POWER AND PUMP Co
Current assignee: ELGIN WIND POWER AND PUMP Co
Priority date: 1901-07-01
Filing date: 1901-07-01
Publication date: 1902-06-10
Anticipated expiration: 1919-06-10

Description

(No Medel.)

. Patented lune l0', |902. as. snow.

WINDMILL.

(Application filed July 1, 1901.)

4 Sheets-Sheet I.

I 05M mi: mii

'Patented lune lo, |902.

W 0 N S um GN WINDMILL. (Applicliinv led July 1, 1901.)

4 Sheets-Sheet 2.

(No Model.)

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Masses v' "1 e EYERS co.. PHOYQLIYHQ. wAsHmGYoN. D c.

` Patented June I0, |902. G. snow.

WINDMILL.

' (Application med July 1, 1901.)

' 4 Shets-Shee 3.

(No Model.)

(Applicatxon mled July 1, 1901.)

Y 4 sheets-sheen.

` UNITED STATES PATENT OFFICE'.

'GILBERT B. SNOYV, OF ELGIN, ILLINOIS, ASSIGNOR TO ELGIN WIND POWER AND PUMPCOMPANY, OF ELGIN, ILLINOIS, A CORPORATION ILLINOIS.V

WINDMI'LL.

SPECIFICAION forming-part of Letters Patent No. 702,161, dated J' une 10, 19.02.

Application filed July l, 1901.

seria No. 66,632. :un man.;

f or support on the main shaft of the wheel;

to improve the hubs or mountings which carry the armsand braces constituting the body of the wheel and to which the rims supporting` the fans are secured;'to improve the construction and operation of the main gearing and its head or support;`Y to improve the'bearin gs for the wheel-shaft and the driving-shaf t for the gearing andthe connections of the gearing with the pump-rod; to improve the means for throwing thefwheel out of the wind, and to improve generally the construction 'and operation of the parts relatingto the' wheel and mill as a whole. v

The invention consists in the features of construction and combinations of parts hereinafter described land claimed.

As the inventionpertains to the construction of the wheel andthe support or head car-. rying the wheel -amlthe main gearing, and the construction Aand arrangement of the parts operated from the main gearing to reciprocate the pump-rod, and to the means for .throwing'the mill orwheel out of thewind, it

is only deemed necessary to illustrate the parts of a windmilll to which theinvention particularly relates, and therefore the upper portion of the tower,with the parts pertaining to the invention thereon, is all that is shown. V In the drawings, Figure l is an elevationv of the upper end of a windmill-tower and the wheel, show-ingthe wheel in sectional eleva support or frame for the main gear and the tion and showing th'evane broken offg'Fig.

2, an4 end elevation of the supporter frame for the main gearing and the Wheel, showing also the upper end of the tower. Fig. 3 is a sectional elevation of the parts shown, taken vonline 3 of Fig. l looking in the direction ofthe arrow; Fig. 4, a top or plan view of the toform a solid and rm tower.

vsupporter frame for the main gearing and the wheel with the connections for operating the pump-rod removed; Fig. 5, a plan view of thegswinging arm or lever for operating the pump-rod; Fig. 6.y a perspective view showing the means for throwing the wheel out of and into the windg'Fig. 7, a detail in section of the vbearing at the top of the tower for the main support or frame for the gearing and Wheel, showing the rod for operating the 'parts by which the mill or wheel is thrown out of and into the wind; Fig. 8, an elevation of the wheel without the fans, showing the hubs, the arms and braces, andthe rims of the wheel; Fig. `9, a' detail in elevation of the outer hub o'r mounting for Athe wheelframe; Fig. 10, a V'detailin 'elevationof the inner hub or mounting forthe wheel-frame; Fig. 11, a detail, partly in section, showing the attachment ofthe fans tothe rim vof the wheel; Fig. 12,a detailin plan, showing the attachment of thefa'ns to the 'rinis'of the` wheel; Fig. 13fa` sectional side elevation of I thebrake block or head audits housing, and Fig.14 a plan View of the brake block or head.

The tower A, `the upper portion only of which is shown, can be made of four corner supports or uprights, each preferably of angle-iron, with the corner posts or uprights suitably braced or connected to each other The tower atiits extreme upper end has attached thereto bybolts o, or otherwise a hollow head or bearing B, having on the outer face projections or corners adapted to nt the interior of the Vangle-iron posts or standards of the tower.

Ahead C, having an annular rim or flange c and a shoulder b, is mounted on the head oribaring B, with the rim c entered into the bearing and the shoulder b resting on the end ofthe bearing, as shown iniFig. 3. The head O has formed therewith a bozor bearing C and a support or` arm C2 onone Yside and on the opposite side has formed therewithpa box or bearing C3 and a horizon'tally-'etending 'shelf or plate C4, which parts, in connection with the head C, constitute the mainframe or support for the gearing and the wheel.

The box or bearing C' has upwardly-,extending flanges or ribs c', and the arm or support C? has upwardly-extending ribs or flanges c2 IOO for giving additional strength to the parts, and the box or bearing C3 likewise has up- Wardly projecting strengthening ribs or fianges c3. The horizontal sleeve or plate Ctl has on its under side a bracing and strengthening flange or rib c4 and is connected to the opposite end of the box or bearing C3 by a horizontal ange c5 and a vertical ange c6, leaving an opening between the fiange c6 and the box or bearing C3 for the passage of an arm of a rock-shaft for throwing the mill out of or into the wind.

The main shaft D of the wheel is mounted in the box or bearing C3 and has attached to its inner end a pinion D' for driving the wheel of the gearing which operates the pump-rod. This shaft D has secured thereto a hub or mounting E, formed of a center e and ears or brackets e', and a circular web or facing d, uniting and bracing the outer ends of the ears or brackets, as shown in Figs. l and lO. Each ear or bracket e' has attached thereto by a bolt e2 or otherwise the inner end of a spoke or arm E', and in addition the inner end of each spoke or arm is attached to the rim or facing d by a bolt d', firmly securing the radiating spokes or arms to the hub or mounting E, as shown in Fig. 10. Attached to the spokes or arms E are two rims F and F', each made of angle-iron, with the outer rim F' attached to the outer ends of the spokes or arms and the inner rim attached to the spokes or arms intermediate of the outer rim and the hub or mounting, as shown in Figs. 1 and 8. Each rim has a horizontal flange fand a vertical ange f', and, as shown, the rims are attached to the radial arms or spokes E' by bolts f2, passing through the iiange f' and the arms or spokes. The extreme outer end of the main shaft D has secured thereto a hub or mounting G, consisting of a center g and ears or brackets g', and a web or facing g2, connecting the ears or brackets. Each ear or bracket g' has secured thereto by a bolt g3 or otherwise the inner end of a brace G', preferably made of angle-iron, and, in addition, the inner end of each brace is secured to the web or facing g2 by a bolt g4 or otherwise, so as to firmly secure the end of the braces to the hub or mounting at their inner ends. The outer end of each brace is turned so as to lie parallel with the vertical tiangef' of the outer rim and is attached thereto by a bolt f4 or in any other suitable manner. The arms or spokes stand vertical, and the braces stand diagonal to the arms or spokes, as shown in Fig. l. The diagonal braces in the construction shown are supported midway of their length by braces F2, attached at their outer ends by a bolt f3 or otherwise to the brace and attached at their inner ends by suitable bolts or otherwise to the inner rim of the wheel-frame. The spokes and the braces alternate, so that a brace lies midway the frame of the wheel very strong and durable and capable of standing great strain in use. The wheel is completed by attaching to the rims F and F' the fans H, which are set at such angle to the wind as to make the mill very powerful and also to enable the mill to run in very light wind, and, as shown, the fans are each attached to the rims by strips or brackets 7i, secured at one end by a bolt h' or otherwise to a fan and at the other end to the vertical flange of the outer and inner rim, thus giving each fan a support at two points and in direct line with the rims.

The construction of the wheel-frame with an inner hub or mounting and an outer hub or mounting, radial arms or spokes extending from the inner hub or mounting, diagonal braces extending from the outer hub or mounting, an inner rim attached to the arms or spokes, and an outer rim attached to the arms or spokes and the diagonal braces furnishes a frame for the wheel having eight points of support of a skeleton formation well adapted for attachment of the fans thereto at the rims, so as to make the wheel capable of great resistance and very powerful in use and at the same time of a construction to run in light wind.

The gear-shaft l is mounted in the box or bearing C and, as shown, is held against endwise movement by a pin t, which bears against the end face of the box or bearing. The other end of the shaft I extends beyond the end of the box or bearing and has attached thereto a disk or wheel J, having an internal gear J', in mesh with which is the pinion D', so that with the revolving of the wind-wheel shaft D the pinion will be revolved, transmitting power to the disk or wheel J through the internal gear J'. The driving-pinion D', it will be seen, is located at one side of the wheelgear J', by which arrangement any wear of the wind-wheel shaft will not operate to throw the gears apart, thus remedying a fault which is common with driving-pinions and powergears in windmills. The disk or wheel J has projecting from its outer face a Wrist-ping', on which is entered the end of a pitman K, which is held on the wrist-pin by a pin or split keyj' in the construction shown. The opposite end of the pitman K is entered onto a wrist-pin or stud 7c and is held thereon by a pin or split key 7c', so that the rotation of the disk or wheel J will give a reciprocating movement to the pitman K and transmit such movement to the arm or lever having the pin or stud 7a projecting out therefrom. The pin or stud 7c projects out from the free end of an arm or lever L, having ears Z at its inner end, which are mounted on a rod L', secured in a bearing Z' at the upper end of the iixed arm or support C2 by a set-screw Z4 passing through a boss Z5 on the bearing Z' to have its end engage with and lock the shaft in a fixed position. The arm or lever L has a continuation L2, as shown in Figs. 1, 2, 3, and 5, at the outer end of which is an eye or loop Z2 for the at- IOO IIO

tachment of the upper end of the pump-rod. The arm or lever L is strengthened in the construction shownby iianges Lgaud L4, but could be otherwise formed so long as it furnishes a connection between the reciprocating pitman and the upper end of the pump-rod for the pitman to oscillate or swing the arm or lever and give al' reciprocating `movement to the pump-rod. The pump-rod at its upper end has a head M to enter the stirrup or loopl2 and be secured therein by a pivot pin or bolt fm, held in place by a pin or split key m', as shown in Fig. 3, and this head has the first section M' of the pump-rod extending downward therefrom to pass through a suitable hole therefor in the head C, as shown in Fig. 3. The pump-rod, as'shown, has a second section M2'with a iiattened end m2, secured between 'ears ms of a forked head m4, attached to the lower end of the rod-section M' by bolts m5; vbut the pump-rod could be otherwise formed. AThe pump-rod passes through a tube N the upper 'end of which is secured in the head C and the lower end of which is'stepped or supported in a spider N', having guideears m to receive the lower end of the tube and arms'n' for attachment'to the corner posts or standards of the tower by bolts n2 orl otherwise, so as to have the spider fixed permanently in position and 'serve as a step'or support for thev lowerV end ofthe tube.l

The vane O may be of any suitable construction and is attached to a'main rod or shaft O', extending from which isa diagonal' rod or brace O2, with the shaft and the' brace connected byY cross-bars o o' or otherwise."

The ends of the shaft O' and brace O2 have holes to receive journal'pins or studs p on a post P, formed with the main frame or sup" port of the wheel and main gearing at theinner end of the box or bearing C5 and adjacent to the horizontal shelf or plate, 'as shown in Figs. 2 and 3,`thus giving the vane a pivotal connection to the head or support of they wheel and gearing, by which the vane is freel to be swung for throwing the wheel out of `or into the wind. The Vane is swung as required for bringing the wheel out of o'rinto the wind by a rod Q, having 'attached to its lower end a rope (not shown) extending down to the base of the tower. The rod Q is attachedto a pendant or socket g on a section or division R of 'a coupling encircling the tube N,

which coupling-section is in two halves or' the coupling-section, and each half or part of the coupling-section Rhas a groove or recess r2` to receive a flange r' on the base end vofthe companion-section R' of the coupling,

so thatthe coupling-section R is free to turn in the couplingsectionR`,and the coupling as a whole is free to be raised and lowered vertically by" means of the rod attached to the pendant or socket. The coupling-section R' on one side has an upward extension or lip r3, to which is attached the lower end of a rod s, running up inside of the head B and through an opening s2 in the head C, with its upper end terminating above the box or bearing C', as shown in Fig'. l. The upperjend of the rod S has a'fork s, betweenthe ears of which is pivoted by a pin or pivot S the outer end of an arm T', extending out from a rockshaft'T, having journals or pins tat its ends,

mountedin ears t' onthe box or bearingO and the flange c6, supporting the shaft T on the main or gearing frame. The rockshaft Thas an arm T2 extending down through the opening T3 between the flange c6 and the box or bearing C3, the lower end of which arm is attached to an eye orear u of a rod U by a pivot or piuu', and the outer end of the rod U has an eye or loop u2 encircling a rod o2 between the shaft O' and brace lO2 of the vane, so that the movement of the rock-shaft Y T by the raising and lowering of the coupling will swing the vane so astothrow the mill out of or into the wind. The construction and arrangement of the parts constituting the means for throwing the mill out of and into K,

the wind are shown in perspective detail in Fig. 6 of the drawings. The controlling means for the'vane by means of which the mill is IOO thrown out of or into the wind can be bali main frame orsupportof the'gearing'and wheel will'enable the wheel to be easily and quickly thrown into and out of the wind.

The mill should have a brake to be applied IIO tothe wheel when the mill is thrown out of the wind,'and the application of the brake the vane to throw the' mill out of the wind. The brake block' or head V has its outer or acting end in the construction shown slightly rounded inV order to fit the depressions/U in l should be simultaneous with the turning of the rear face of the web or facing cl, which face, asshown, is formed convoluted, having depressions or concave portions t and risers or convex portions fu', so that when. the acting end." of the brake block 'or'head is'in'a de'pres' sion the riser will serve as'a resistance to stop the rotation of the wheel. The brake block or head V is slidable iu'and out in a housing V', formed on the end `of the journal-box C adjacent to the path or `travel of the wheel.

The brake block or head has'therein a `T- shaped recess w', which receives the head zu of a rod or link W, and the'inner end of the link is/connected by aneye-pin 102 with an arm W', extending down from the rocksh'aft T, the end of the link passing through the eye in the pin, and between' the pin and the `the convolutions on the rear face of the spider and have the engagement sufficiently strong to retard and finally stop the revolving of the wind-wheel. vThe brake is exceedingly simple in construction and is operative coincidingly with the throwing of the mill out of the wind by the turning of the vane, so that with the operation of throwing the mill out of the wind the brake will be applied to stop the revolvng of the wheel.

The frame or support carrying the shafts of the wind-wheel and of the gearing is of a form to give the necessary support for the shafts and the parts connected therewith and operated therefrom. The main gearing by which the pump-rod is actuated is carried in such manner on the frame or support as to give the best advantages for operation in transmitting power from the wheel to operate the pump-rod. The connection between the wheel and the pump-rod is one which utilizes the full power of the wheel in operating the rod. The connecting means are so arranged and formed as to furnish strength without too much weight, and at the same time have the transmitted power act in the best manner possible on the pump-rod, and the construction of the wheel is one which while light as to the partscomposingtheframeisstrongagainst resisting pressure without impairing the running qualities of the wheels in light wind. The pitman, it will be noticed, is located entirely outside of the gear, being attached at one end to the wrist-pinprojecting out from the face of the gear disk or wheel and at the other end to the wrist-pin projecting out from the arm or lever, leaving the space within the gear entirely clear of the connecting means between the gear and the pump-rod. This arrangement enables the main frame to be foreshortened and brought into a very compact form, occupying but small space as compared with the main gear-frame of other mills, and it also makes the connection between the gear and the pump-rod on the outside, so as to be readily accessible for repairs or other purposes, and it also enables a continuous and solid bearin g to be had for both the windwheel shaft and the gear-shaft, making it possible with the construction and arrangement to greatly cheapen the cost as well as to give increased strength and durability. The several advantages which enter into the invention add to the windmill as a whole power, strength, and durability, which are Y desirable features in the construction and operation of windmills.

What I regard as new, and desire to secure by Letters Patent, is-

1. In a Windmill, the combination of a windwheelshaft, an inner hub or mounting and an outer hub or mounting on the wind-wheel shaft, spokes or arms radiating from the inner hub or mounting, an inner and an outer rim, both rims continuous and each rim having a horizontal fiange and a vertical flange, both rims attached each by its vertical flange to the radiating spokes or arms, and radial diagonal braces extending from the outer hub or mounting to the outer rim and attached to the hub or mounting and to a flange of the -outer rim, the braces alternating with the arms or spokes, substantially as described.

2. In a windmill, the combination of awindwheel shaft, an inner hub or mounting and an outer hub or mounting on the wind-wheel shaft, spokes or arms radiating from the inner hub or mounting, an inner and an outer rim, both rims continuous and each rim having a horizontal flange and a vertical fiange, both rims attached each by its vertical iange to the radiating spokes or arms, radial diagonal braces extending from the outer hub or mounting to the outer rim, and attached to the hub or mounting and to a flange of the outer rim, the braces alternating with the arms or spokes, and fans attached to the outer and inner rims, substantially as described.

3. In a windmill, the combination of a windwheel shaft, an inner hub or mounting and an outer hub or mounting ou the wind-wheel shaft, each hub or mounting having a center and radial ears or brackets extending from the center, arms or spokes attached at their `inner ends to the ears or brackets of the inner hub or mounting, an outer and an inner rim, both rims continuous and each rim having a horizontal flange and a vertical flange, both rims attached each by its vertical flange to the arms or spokes, and diagonal braces attached at their inner ends to the ears or brackets of the outer hub or mounting and attached at their outer ends to the vertical flange of the outer rim, the braces alternating with the arms or spokes, substantially as described.

4. In a windmill, the combination of a windwheel shaft, an inner hub or mounting and an outer hub or mounting on the wind-wheel shaft, each hub or mounting consisting of a center, radial ears or brackets and a plate or facing connecting the ears or brackets, arms or spokes attached at' their inner ends to the ears or brackets of the inner hub or mounting and to the facing, an outer rim and an inner rim, both rims continuous and each rim having a horizontal flange and a vertical flange, both rims attached each by its vertical flange to the arms or spokes, and diagonal braces attached at their inner ends to the ears or brackets and the facing of the outer IOO IIO

llo

hub or mounting and attached at their outer ends to the vertical flange of the outer'rim, the braces alternating with the arms or spokes, substantially as described.

5. In awindmill, the combination of awindwheel shaft, an inner hub or mounting and an outer hub or mounting on the wind-wheel shaft, each hub or mounting consisting of a center, radial ears or brackets and a plate or facing connecting the ears or brackets, arms or spokes attached at their inner ends to the ears or brackets of the inner hub or mounting and to the facing, an outer rim and an inner rim, both rims continuous and each rimA having a horizontal fiange and a vertical fiange, both rims attached each by itsvertical flange to the arms or spokes, diagonal Abraces attached at their inner ends to the ears or brackets and the facing of the outer hub,

or mounting and attached at their outer ends vto the vertical ange of the outer rim, the

braces alternating with the arms or spokes, and fans attached to the outer and inner rims, substantially as described.

6. In a windmill, the combination` of a hon! zontal main frame or support having on its;

upper face an extended box or bearingfor the wind-wheel shaft and an extended box or bearing for the gear-shaft the two boxes or bearings arranged side by side in a horizontal plane, a fixed arm upwardly and outwardly extending from the main frame or support, and a vibratable arm or lever pivotally mounted at its inner end on the fixed arm and having an upward, forward and lateral projection for connection with a wheel or disk on the gear-shaft and a lower forward continuation for connection with a pump-rod for giving the pump-rod, its reciprocating movements, substantially as described.

7. In a windmill, the combination of ahorizontal main frame or support having on its upper face an extended box or bearing for the wind-wheel shaft and an extended box or bearing for the gear-shaft, the two boxes or bearings arranged side by side in a horizontal plane, a fixed arm upwardly and outwardly extending from the main frame or support, a vibratable arm or lever pivotally mounted at its inner end on the xed arm and having an upward, forward and lateral projection, a

pitman connecting the lateral endy of the vi-A bratable arm or lever with the disk or wheel on the gear-shaft, and a lower forward extension of the vibratable arm or lever for attachment thereto of the pump-rod, substantially as described.

8. In a windmill, the combination of a hori- 'zontal main frame or support having an ex-` tended box or bearing for the wind-wheel shaft and an extended box or bearing for the gear-shaft, the two boxes or bearings arranged side by side in a horizontal plane, a fixed arm upwardly and outwardly extending from the main frame or support, a wind-wheel shaft mounted in the box or bearing therefor on the main frame or support, a pinion on the wind-wheel shaft, a gear-shaft mounted in the box or bearing therefor on the mainframe or support and having a disk or wheel in mesh with theV pinion of the wind-wheel shaft, a vibratable arm or lever lpivotally mounted at its inner end on the fixed arm of the main frame or support and having an 4upward,for ward and lateral projection, a pitman` connecting the disk or wheel with the lateral end of thevibratable armor lever, and a lower forward extension of the vibratable arm or lever for attachment to the pump-rod, substantially as described.

9. In a windmill, the combination of a horizontal .main frame or support havinganextended box or bearing for the wind-wheel shaft and an extended box or bearing for the gear-shaft, the two boxes or bearings arranged side by side in a horizontal plane, a fixed arm upwardly and outwardly extending from the main frame or support, a wind-wheel shaft vmounted in the box or'bearing therefor on the main frame or support, apinion on the end of the wind-wheel shaft, a ygear-shaft mounted in the box or bearing therefor on the main frame or support, a diskor wheel on'the end of the gear-shaft in mesh with the pinion of the wind-wheel shaft, a vibratable arm or lever pivotally mounted at its inner end on the fixed arm of the main frame or support and having an upward, forward an'dlateral projection, a pitman pivotally connected with the disk or wheel of the gearfshaft and with the lateral end ofthe vibratable arm or lever,

a lower forward extension'on the vibratable I OG arm or lever for, attachment to a pump-rod,

and a pump-rod reciprocated by the move'f ments of the arm or lever, substantially as described.

side by side in a horizontal plane, axed arm outwardly and upwardly extending from the main frame or support, a vibratable arm or lever pivotally mounted at its inner endv on the fixed arm and having an upward, forward vand lateral projection for connectionlwith the gear wheel or disk` on the gear-shaft, and a lower forward extension for connection with the pump-rod for reciprocating the pu nip-rod, substantially as described.

l1. In a windmill,the combination'ofabearing-head at .the upper end of the tower, l a horizontal main frame orsupport mounted on the bearing-head and having a box or bearing for the wind-wheel shaft and a box or bearing for the gear-shaft, the two boxes or bearin gs arranged side by side in a horizontal plane, a fixed arm upwardly and outwardly extending from the mainframe or support, a wind-wheel shaft mounted in the box or bearingtherefor on the main frame or support, a pinion at the end of the wind-wheelshaft, a

IIS

gear-shaft mounted in the box or bearing therefor on the main frame or support, a disk or wheel ou the gear-shaft in mesh with the pinion of the wind-wheel shaft, a vibratable arm or lever pivotally mounted at its inner end on the fixed arm and having an upward, forward and lateral/projection, a pitman connecting the projecting lateral end of the vibratable arm or lever with the disk or wheel of the gear-shaft, a forward extension of the vibrar able arm or lever in line with the pumprod, and a pump-rod connected to the extension of the vibratable arm or lever, substantially as described.

l2. In awindmill,the combination ofa bearing-head at the upper end of the tower, a horizontal main frame or support mounted on the bearinghead and revoluble thereon and having a box or bearing for the windwheel shaft and a box or bearing for the gearshaft, the two boxes arranged side by side in a horizontal plane and parallel one with the other, a fixed arm upwardly and outwardly extending from the main frame or support, a wind-wheel shaft mounted in the box or bearing therefor on the main frame or support, a gear-shaft mounted in the box or bearing therefor on the main frame or support., a disk or wheel on the gear-shaft revoluble from the wind-wheel shaft, and a vibratable arm or lever pivotally mounted at its innerend on the xed arm and having an upward, forward and lateral projection for connection with the disk or wheel gear shaft and a forward extension For connection with the pump-rod for reciprocating the pumprod, substantially as described. y

13. In a windmill,the combination ofa main frame orsupport,a rock-shaft mounted on the main frame orsupport,an arm on the rock-shaft for turning the vane to throw the mill out of the vrind, a second arm on the rock-shaft for advancing and receding a brake block or head with the act of turning the vane to throw the mill ont of the wind, a slidable horizontal brake block or head, connected with and op erated fromthe second arm of the rock-shaft and a center or hub for a Wind-Wheel and having a convoluted face engaged by the acting end of the brake block or head, substantially as described.

14. In a windmill,the combination of a main frame or support, a rocleshaft mounted on the main frame or support, an arm on the rockshaft for turning the vane to throw the mill out of the wind, a second arm on the rockshaft, a rod connected with the second arm, a coil-spring encircling the rod, a `slidable horizontal brake block or head connected with the rod, and a hub or center for a wind-wheel having a convoluted face engaged by the aoting ends of the brake block or head in turning the vane to throw the wheel out ol the wind, substantially as described.

GILBERT -l SN OW.