US1372834A - Propeller - Google Patents

Description

B. SCHMELZER.

PROPELLER.

APPLICATION FILED JUNE 26. I9I9.

Patented Mar. 29, 1921.

Summa:

BRUNO SCHIVIELZER, OF JERSEY CTY, NEV JERSEY.

PROPELLER.

Application filed June 26, 1919.

To all whom it may concern:

Be it known that l, BRUNO SGHMELZER, citizen of the Republic of Foland, residing at Jersey City, county of Hudson, and State of New Jersey, have invented certain new and useful Improvements in Propellers, of which the following is a specification.

This invention relates to a propeller adapted for use on aeroplanes, flying machines, dirigibles, motor boats or the like, the 'present invention being an improvement on that described in a prior patent issued to me on September 12th, 1916, under No. 1,197,766.

The invention has for an object to provide a simple and efficient propeller construction by which a high degree both of tractive and lifting force may be exerted.

For further comprehension of the invention, and of the objects and advantages thereof, reference will be had to the following description and accompanying drawings, and to the appended claims in which the various novel features of the invention are more particularly set forth.

Figure 1 of the drawings is a plan view of a propeller constructed according to my invention.

Fig. 2 is a side elevation thereof.

Fig. 3 is a detail horizontal section on the line 3 3 of Fig. 2. A

Fig. 4t is a diagrammatic view showing the means for shifting the housing.

My improved propeller may be mounted in any desired manner suitable to the structure to which it is to be applied, being here shown as mounted on the upper ends of standards 1 which may project from any car or body structure of the aeroplane, or other vehicle, to which the propeller is applied.

The propeller proper comprises a series of hollow vanes 3, of which three are here shown, which radiate from a hub 4.

Considered in transverse section each vane is of generally triangular shape and is formed by two convexed side members 5 and 6 which incline inwardly toward one another, the space between the rear edges of these members being left open.

As seen in rear elevation the outer edges of the members 5 and 6 extend outwardly from the hub 4f parallel to each other for somewhat more than half the length of the vane and then incline inwardly toward one another as at 5 and 6 to meet at the tip of the vane.

Specification of Letters Patent.

Patented Mar. 29, i921.

Serial No. 306,897.

As seen in side elevation the forward edge of the vane extends radially outward throughout its length while the rear edge curves gradually away from the hub at an angle to the front edge as at 8 and finally curves inwardly as at 9 to meet the front edge.

flhe propeller may be driven from any suitable source of power which may be transmitted to the propeller by a bevel gear 10 fixed on the shaft 11 on which the hub 1 is mounted.

A semi-circular housing 12 cooperates with the propeller, this housing being of a size and shape to inclose the propeller and being mounted concentrically thereto on the standards 1, the housing having hubs 13 which support the shaft and are in turn supported in suitable bearings in the standards.

The housing may be adjusted around the propeller by means of a worm gear 14 fixed to one of the housing hubs 13 and engaged by a worm pinion 15 on one end of a shaft 16, the opposite end of said shaft having a handle 17 whereby it may be manually rotated to shift the housing.

As will be apparent the housing may be shifted around the propeller to occupy any position desired so as to cause the beat of the vaines on the air to drive the vehicle in which it is mounted horizontally or cause it to ascend or descend.

Having thus described my invention what l claim as new and desire to secure by Letters Patent, is

1. A. propeller comprising a hub, and a vane on said hub consisting of a pair of side members which in cross section are convexly curved and inclined to a common point centrally between the sides of the vane, the opposed edges of said members extending outwardly from the hub parallel to each other for a portion of the length of the vane and then inclining inwardly toward one another to meet at the tip of the vane.

2. A propeller comprising a hub, and a vane on said hub consisting of a pair of side members which in cross section are convexly curved and incline to a common point centrally between the sides of the vane, the space between the opposed edges of said members being open, the said opposed edges extending outwardly from the hub parallel to each other for slightly more than onehalf the length of the vane and then inclining inwardly toward one another to meet at the tip of the vane, said members extending radially outwardly on their advancing side the opposite side curving` from the hase to the tip of the vane just outwardly 'from and then inwardly toward the :first side.

3. A propeller having a vane Consisting of a pair of eonveXly Curved side members which incline to a common point central between the sides of the vane, the space be- 10 tween the separated edges of said members being open, said membersV extending radially outwardly on their advancing` side, the opposite side curving from the base to the tip of the vane first outwardly from and then inwardly toward the irst side.

ln testimony whereof, have signed my name to this specification this 3rd day of June, 1919.

BRUNO SCHMELZER.

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