US1036431A - Propeller for aerial vessels. - Google Patents

Description

J. BOWIE.

PROPELLER FOR AERIALVESSELS.

APPLIGATION FILED NOV. 3, 1911.

1 036 431, Patented Aug. 20, 1912.

2 s Fla 1' 3 SHEETS-SHEET 1.

a 0 161 meet I Y 4 mm J-H J J r-L J J ll ll, 6@

WITNESSES l/VVE/VTaR ATTY J. BOWIE.

PEOPBLLER FOR AERIAL VESSELS.

APPLICATION FILED 11017.3, 1911.

1,036,43 1 Pa ented Aug. 20, 1912.

3 SHEETS-SHEET 2.

WITNESSES /NvENTO fi J. BOWIE. PROPELLER FOB AERIAL VESSELS.

APPLIOATIONYIILED NOV. 3, ;l911.

1,036,431 Patented Aug. 20, 1912.

r1 5 3 SHEETS-SHEET a.

g 1 0 u. I a

/A/ E WITNESSES V M W m JAMES BOWIE, OF EDINBURGH, SCOTLAND.

PROPELLER FOR AERIAL VE SSELS.

Specification of Letters Patent.

Patented Aug. 20. 1912.

Application filed November 3, 1911. Serial No. 658,346.

To all whom it may concern: I

Be it known that I, JAMES Bowns, a subject of the King of Great Britain and Irevertically aerial vessels.

, In carrying out my invention the propeller consists of a screw-like device, made up of one or more convolutions. The inner edge, or edges, of'thepropeller are fixed to a vertical revolving shaft which maybe c011- nected directly to the motor. The pitch and breadth or depth of the screw-like device and the angle it forms with the shaft may be varied as found most suitable in practice. For examplethe angle that the surface of the blades makes relative to the shaft may be approximately a right angle at the top,- the angle gradually becoming more acute until 'it reaches a vertical or nearly vertical position at the bottom. To the outer edge of the propeller, or the lower part thereof, a curtain or screen is arranged to hang vertically, or approximately vertically. To the lower end of the propeller there is fitted a baflle plate which extends inward at right angles to the curtainor screen. To enable the propeller to act as a parachute, it is provided with a hinged plate, or shutter, which automatically opens when the propeller is driven in one direction, and automatically closes, or is mechanically closed, when the propeller rotates in the opposite direction.

In order that my said invention and the manner of performing the same may be properly understood I hereunto append three sheets of explanatory drawings to be hereinafter referred to in describing my 1n vent-ion. I

Figure 1, is an elevation of my improved propeller, and Fig. 2, is a plan of the supporting stays and base plate, but with the propeller removed. Fig. 3, is an elevation at right angles to Fig. 1, and Fig. 4, is a general view showing a vessel, provided with my improved propeller, which has ascended from the deck of a warship. Fig. 5, is a view similar to Fig. 3, showing'the hinged plate, or shutter, and Fig. 6. is a view of a part of the propeller showing the hinged plate or shutter, in its operative position.

In these drawings the same reference letters are used to mark the same or like parts wherever they are repeated.

As shown in Figs. 1 and 3, of the drawings, the propeller consists of a screw-like device A, made up of two convolutions. The propeller A, is fitted to a vertically rotating shaft B, a part of which may be of square formation in cross section, and the propeller is secured to the shaft by means of brackets C. The shaft B, is supported in bearings D, E, and F, preferably of the ball or roller type, and also by means of the vertical and horizontal stays G, H, the former being fixed to the base or sole plate J. The

propeller A,'is provided with a vertically depending curtain or screen K, the object of which is to prevent the air escaping around the periphery of the propeller. A ballle plate L, (Fig. 3) is fitted at the lower end of the propeller A, and extends inward at right angles to the curtain K, so as to deflect the air, after it, has traveled over the under surface of the propeller, in a downward direction. The propeller A, is provided with a hinged plate, or shutter M, said plate being hinged to the under surface of the top convolution, as shown in Fig. 5, and when closed, or in its operative position, bearing against stops N, on the lower surface of the upper convolution, as shown in Fig. 6, or these stops may be fitted to the upper surface of the lower convolution. In this way a complete convolution of the propeller can be utilized to act as a parachute and so serve to arrest or check a too sudden descent.

Any suitable number of these propellers able valves, therebyserving as water ballast tanks in the event of the vessel the water.

Any suitable motive power may be employed to drive the propeller or propellers.

What I claim as my invention is 7 1.- In a propeller for aerial vessels, in combination, arotatable shaft, a screw-like propeller blade of one or more Continuous convolutions secured thereto, a fixed baffle plate between one end of said blade and said shaft, and a plate swingingly secured to said blade and adapted to cooperate with said baffle plate to form an air pocket whenthe propeller rotates in one direction.

2. In a propeller for aerial vessels, in combination, a rotatable shaft, a screw-like propeller blade of one or more continuous-convolutions secured thereto, said blade being provided with a curtain at its outer edge exalighting on tending in a direction parallel to said shaft, said curtain extending fromone end of said.- blade throughout one completeI convolution thereof, afixed baffle plate between one end of said blade and said shaft, and a plate swingingly secured to said blade and adapted to cooperate with said baffle plate to form an air pocket when the propeller rot-ates" in one direction, said swinging plate being spaced from said fixed plate at a distance corresponding to one complete convolution of said blade.

In testimony whereof I. have signed my name to-this specifieationin the presence of two subscribing: witnesses.

J AMES 'BOWIE.

Witnesses:

GEORGE PATTERSON, J AMES WHITELAW.

Images