US1921534A - Propeller - Google Patents

Description

ug. 8, 1933. B, B. MccRosKY 1,921,534

PROPELLER Filed Feb. 29, 1932 3 Sheets-Sheet l INVENTOR4 Aug. s, 1933. B. B. MCCROSKY 1,921,534

` PROPELLER Filed Feb. 29, 1932 5 Sheets-Sheet 2 /1 TTORNE YS.

Aug. 8, 1933. B Bl MCCROSKY 1,921,534

PROPELLER Filed Feb. 29, 1952 3 Sheets-Sheet 5 W @v 771 SQ il@ Vgearing or other suitable means.

Patented l'uug.l g, 1933 Amirra stares PATENT erica a deviceas outlined Withan especially eflicient.

type of vane which is operable only during a portion or each revolution whereby the propeller to one side of the axis develops full power while the other side oilers substantially no resistance.

A further object oi the invention is to provide a shutter type vane and automatic means for its operation. g Other objects and advantages of the invention will become apparent as the following description is read on the drawings forming a part oi this cification and inA which similar reference characters are used to designate similar parts throughout' the several views'and in which:

Fig. 1 Yis a side elevation of the invention.

Fig. 2 a front elevation of the invention.

Fig. 3 is a front elevation of the mechanically actuated vane'.Y

Fig. 4 is a section taken on line 4--4 of Fig. 3.

Fig. 5 is a section taken on line 5-5 of Fig. 3.

Fig. 6 is a View showing the automatically actuated vane.

Fig. 7 is a diagrammatic view showing the position of the shutters operated as indicated in Figs. 1 and 2, throughout one revolution of the e wheel.

Fig. 8 is a fragmentary View showingthe shutters open. v

Fig. 9 is a sectional elevation of a modiiication of the invention taken on line 9-9 of Fig. 10.

Fig. 10 is a front elevation of the modification shown in Fig. 9. Y

The invention consists of a pair of spaced apart wheels l0 and 1l, the wheel 10 having inwardly extending hub '12 and wheel 11 having an inwardly extending hub 14, these wheels being rotatably mounted on a crank shaft l5. The crank shaft has one end rotatably supported in a bearing 16, the other end being provided with adjusting means 17 which may consist of a lever,

Hub 13 is rotatably supported in a bearing 18, whereby the device is supported by the crank shaft on one side and by the hub i3 on the other side. The crank 19 is straddled by the hubs 12 and 14.

The crank shaft has an eccentric 20 interposed between the bearing lo and outside of wheel 11. Power is takenfrom or delivered to the device through the hub 13, suitable gears or pulleys being Ysecured between bearing 13 and lever 1'? on thehubr13.

Fixedly secured between the wheels 1,0 and 1l are brackets `2l which are equally spaced about the periphery Aand extend inwardly as shown, and are provided withtwo spaced apart pivots 22 and 23. Vanes 24, 25, 26 and2'7 each'have two pivots spaced apart as at 23 and 29.y Y

lA collar 30 is rotatably mounted on the crank le and has a pivot 31 for each vane, and connecting rods connect between the pivots 31 and 29 while other rods connect respectively between the pivots 22' and ,29, and 23and 23 respectively. ySecured to kthe rims of wheels 1'0 and 11 are equally spaced shutter vanes 32, 33, 34 and 35, each of which consists of a frame having sides 36 and 37 and top 38 and bottom v39. Pivoted between the sides 36 and 37 are a plurality of shutter blades 43, the pivots being indicated at 4l. The bladesV 40 each have an integralcam member .42 provided with ra oamuslot 43 which is so formed as to actuate the shutters in such manner as to provide the highest emciency or lowest reaction, these cam members being .spaced from the side 36. interposed between side36 and cam members 42 is a plate 44 having pins 45 cooperating with cam slots 43 and an outwardly extending pin 46 which is slidabie in a vertical slot in the side 36. The actuating mechanism for the shutter consists of -a plunger 47 having outwardly extending y.

pins 48 which engage the pin 46,' the plunger being connected to the collar 30 by means of connecting rods 49, the plungers being resiliently cushioned to prevent chatter, and housed with a shell '56 which is suitably secured to the side 36.

A collar 5l is rotatably mounted on the eccentric 20 and has the connecting rods 49 pivoted thereto as indicated at 52. f

An automatic shutter vane is indicated in Figs.

6 and 8 and consists of a housing 53 in which a plurality of pairs of shutters are pivoted at 54,

the pairs each consisting of blades 55 and 56 prosive are actuated by the rotation of the wheels 10 and 11 and actuate the wheel by the variation in distance o1 the vanes from the axis of the wheel. With the wind blowing in the direction indicated by the arrow the pressure on vanes 24 and 26 would be substantially equal but the distance of vane 24 from the axis of the wheel is about twice that of vane 28. By adjusting crankshaft 15 through an angle or" one hundred eighty degrees, the direction of rotation of the wheel would be reversed.

With the vanes 32 to 35, rotation of the wheels 10 and 11 cause the shutters 40 to open and close once for each revolution and under the same conditions as outlined for vanes 2a to 27, the shutters are open in vane 34 starting to open in 33, closed in 32 and just completed closing in vane 35.

Referring to Fig. 7, with the wind blowing .in the direction of the arrows, the wheel would .turn clockwise and there would be practically no resistance -at the positions 8l, 52, 63, 64 and 65 while the full wind pressure would be available at positions 66, 57 and 68. Y

By driving the wheel clockwise from an external source oi power wind pressure would be created in the direction of the arrows from the lower part ci the fan only. The cam slots 43 can be so formed as to provide the exact operation of the blades as required for any particular purpose.

A modiiication of the shutter vane propeller is shown in Figs. 9 and 10 in which a pair of spaced apart wheels 69 and 70 which havel inwardly and outwardly extending hubs 7l and 72 are rotatably mounted in bearings 73 and 74 integral with a base 75.

A crankshaft 76 is rotatably mounted in the hubs 7l and 72 and has ailixed at one end, adjusting means which is indicated in the drawings as a sprocket?? and chain '78 which may be operated by means of a sprocket '79 through worm gear 80 and worm 81 and which will lbe substantially self-locking in adjusted position.

Rotatably mounted on the crank 82 of crankshaft "76 is a spider 83 having` arms equal in number to the number of vanes used.

The automatic shutter vane indicated in Figs.

n and 8, is particularly adapted to this type of propeller and these shutter vanes are mounted in pairs as shown at 84 and 85 which are respectively pivoted at 86 and 87 and intermediately connected by a pin 88 secured in the inside walls 53 and forming a crank which is pivoted in the ends of the arms on the spider 83.

Driving means such as a pinion or pulley is secured on one of the hub extensions 72.

With the wheel 69-70 driven in the direction indicated by the arrow, and the crankshaft 76 adjusted in the position shown in the drawings, air reaction at the top vane 89 will be inthe direction indicated by the arrow in Fig. 6 causing the vanes to separate forming a full reactive surface. At 90 the shutters 55-56 will be idle as there will be no air reaction. At 91 the air reaction will be in the direction indicated by arrow 92 in Figs. 6 and 8, automatically opening the vane with the shutters in the position shown in Fig. 8, the vanes maintaining a position parallel to each other.

`By adjusting crankshaft 76 clockwise through ninety degrees, the vanes will all be directed radially to the right as viewed in Fig. 9 and the air reaction will be upward on the right hand vane 90 and vanes 89 and 91 will be idle.

Having described an operable method of constructing and. using the invention it will be noted that variations in construction and arrangement In combination with a propeller, a shutter vane comprising a frame, a plurality of shutter blades pivotally mounted in said lne, integral cam members for said blades, and having cam slots formed therein, a plate having projecting pins cooperating with said earn slots, an outwardly projecting pin on said plate operating through a slot in the side of said housing, a plunger coA operating with said pin, and means for operat-V

Images