US1571303A - Duplex air rotor - Google Patents

Description

Feb. 2 1926.

El. SCHAFRAN DUPLEX AIR ROTOH 3 Sheets-Sheet 1 Original Filed May l5, 1922 Feb i. SCHAFRAN DUPLEX AIR RoToR original Filed .may 15, 1922 5 Sheets-shed 2 if 5 3 @Hernani Feb. 2, 192e. 1,571,303'

l. SCHAFRAN DUPLEX AIR ROTOR Original Filed May l5, 1922 5 Sheets-Sheet 3 Patented yFeb. 2, 1926.

UNTED STATES PATENT OFFICE.

ISAAC SCI-IAFBJAN, OF NEW YORK, N. Y., ASSIG-NOR QF ONE-HALF TO LOUIS BRUGER,

OF MONTREAL, QUEBEC, CANADA.

DUPLEX AIR ROTOR.

Application filed May 15, 1922, Serial No. 561,195, Renewed November 28, 1925.

To all whom t may concern Be it known that I, Isaac SoHArnAN, a citizen of Rumania, residing at 301 Madison Avenue, New York city, in the State of New York, in the United States of America, have invented certain new and useful Improvements in Duplex Air Rotors; and I do hereby declare that the following is a full, clear,

land exact description of the invention, such vas will enable others skilled in the art to lwhich it appert-ains to make and use the same.

yutilized in driving an aeroplane, while the back stream, which is incidental to the thrust, is ydirected rearwardly. This back stream hasl as yet not been utilized, and the object of this invention resides in the means for utilizing the back stream in conjunction with the thrust.

In the accompanying drawings and specification, the principle of the invention is shown'as applied to a generator. A pair of shafts are employed, to one of which a propeller is fixed. The thrust of the propeller resultsin rotation of the shaft. The other shaft carries a turbine disposed within the back stream of the propeller and adapted to utilize the same whereby the turbine is rotated. These two movements, which are in opposite directions, are available for the rotation of a. magnetic field and an armature therein, these latter elements being mounted respectively on the two shafts.

In the accompanying drawings in which an illustrative form of generator is shown:

Figure 1 is a front view of the device;

Figure 2 is a similar fragmentary view in section; y

Figure 3 is a section on the line 3-3 of Figure 1;

Figure 4 is a detail of one of the yokes;

Figure 5 is a section on the line 5-5 of Figure 1;

Figure Figure 1;

Figure 7 is a section on the line Figure 1; and,

6 is a section on the line 6-6 of Figure 8 is a section on the line 8-8 of Figure 1, showing the means of supplying current to the propeller motors.

Referring to the drawings by reference characters throughout the various views, the numeral 1 indicates a pair of journal bea-rings consisting of pillows 2 and caps 3. shaft 4 is supported at its ends for rotation in the bearings according to any usual or desired manner. A turbine 6 is keyed to this shaft preferably at the intermediate portion thereof for a purpose later to be described. At each side of the turbine is a hollow shaft 7 carrying a wheel 8 at one end and a drum 9 at the other. These hollow shafts surround and are concentric with the first named shaft 4, and are supported in this position by means of thejournal bearings 10. The respective wheels 8 are connected to one another by means of the yokes 11 at any desired number of places along their circumferences. The saddles 12 of the yokes are inclined towards the turbine, and each saddle supports a motor 13 to the rotor or shaft of which is keyed a propeller 14. These propellers are of the aerial type, and are capable of driving themselves forward and at the same time delivering a back stream. The size of these propellers is governed entirely by conditions, and in all cases they should be inclined toward the turbine in such a manner as to deliver their back stream thereto with the utmost efficiency. This condition is governed largely by the inclination of the saddles 12.

Each drum 9 has secured to its inner surface a plurality of windings or coils 15 which carry a current and thus constitute a magnetic field suitable for a generator. It is to be noted here that these poles, being immovable relatively to the wheels 8, are rotated with them, namely, in unisonV with the thrust of the propellers 14. The outer ends of the inner shaft 4, which protrude beyond the hollow shaft 7 each carry an armature 16 disposed within one of the magnetic fields and adapted to cooperate therewith. The armature illustrated in this instance is of the spider type, having spiders 17 and a winding 18, as clearly shown in Figure 6.

For the purpose of supplying current to the motors 13, contact rings 19 are mounted at the side of one of the wheels 8, and current is conducted to these rings through the brushes 20. Conductors 21 form a circuit in Figure 5.

from the rings through the motors. The commutator 22 `of the Vgenerator is engaged by commutator brushes 23 through which the current flows to the collector rings 24 mounted on the outside of the drums 9. These rings are insulated from the drum by means of a band 25. The current is conducted away from the collector rings through the brushes 26 in a well known manner. A similar set of slip rings 27 are likewise mounted on the drum and insulated thereiroiii by means of the band 25. These rings are in circuit with the iield coils tor supplying current thereto, which current is delivered to the rings through the brushes 28. n

The operation of the device is as follows: A current `having been supplied to the motors 13 in any usual or well known manner, the aerial propellers ltare set in rotation, whereupon 'the yokes 1l and wheels 8 are vdriven lin the direction of the arrow a Asalready pointed out, the drums 9 and the magnetic fields contained therein are rotated in the same direction. Theback stream of these propellers is driven against the turbine 6, the blades 6 of which are soarranged with respect to the propellers as to yreceivethe full force of the back stream, whereupon the turbine is driven in the direction of the arrow Z) in Figure 5. This kmovement is directly imparted to the shaft 4C, since the turbine is keyed thereto,

`and as a consequence the spider armature 17 is simultaneously rotated in thesame Vdirection. Tlietinal result is the opposite movements of the poles vl5 and the armature 17 and the consequent production of an elec-r tric current.

It will be understood that the generator described and illustrated may be modified in several ways in order to make lit better suitable i''or particular :uses Yfor lwhich it is 'destined without departing from the spirit or' the invention. For instance, the nature of the various .windings and the manner of winding them on the respective shafts may bealtered tonn'ieet required conditions. The invention is to be understood, however, as a vrmeans ljtor utilizing all the available power fromv a propeller, as indicated by .pended claims.

Having thus fully ldescribed the inventhe ap- ',adapted to rotate the same, a

the same, a second movable body disposed in and adapted to be moved by the back stream ot the said propeller, and means for combining the energy delivered by the two bodies.

2. A motive mechanism comprisinga pair of shafts, one within the other 4and Supported for independent rotation, a propeller supported on one ot saidy shafts and adapted to rotate the same, and a turbine-keyed to the other shaft, said turbine being disposed inthe back stream of said propeller.

I 3. A motive mechanism comprising a pair of shafts, one within the other and supported ttor independent rotation, a propeller supported on one of said shafts and adapted to rotate the same, a turbine keyed to the other shaft, said turbine being disposed in the .back stream of said propeller, a field frame carried by one of said shafts, a magnetic field arranged within saidframe, and an armature carried by the other shaft and disposed within the ield.

4. A motive mechanism comprising a pair of shafts, one within the other and sup- Eportedfor independent rotation, a propeller 4supported on one of said shafts and adapted to rotate the same, a turbine keyed to :the

vother shaft, 4said turbine being disposed in fthe back stream ot said propeller, a drum carried by one of said shafts, a imagnetic field arranged within said drum, an armature carried by the other shaft anddisposed within the field.

k5. A motive mechanism comprising a pair of shafts, one within the other, the inner shaft extending beyond the outer one, a propeller :supported on the outer yshaft and turbine .keyed to the inner shaft and disposedin the back stream of the propellenadrum fixed to the end of the outer shaft, a magnetic Afield yarranged .within said drum, andan armature fixed to the protruding end of the inner shaft and within the field.

In witness whereof I have hereunto set my hand. f l.

ISAAC SCHAFRAN.

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