US1399290A - Propeller for aircraft - Google Patents

Propeller for aircraft Download PDF

Info

Publication number
US1399290A
US1399290A US42445820A US1399290A US 1399290 A US1399290 A US 1399290A US 42445820 A US42445820 A US 42445820A US 1399290 A US1399290 A US 1399290A
Authority
US
United States
Prior art keywords
propeller
sections
aircraft
spiral
hub
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
Inventor
Brulle Alexander
Original Assignee
Brulle Alexander
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Brulle Alexander filed Critical Brulle Alexander
Priority to US42445820 priority Critical patent/US1399290A/en
Application granted granted Critical
Publication of US1399290A publication Critical patent/US1399290A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B64AIRCRAFT; AVIATION; COSMONAUTICS
    • B64CAEROPLANES; HELICOPTERS
    • B64C11/00Propellers, e.g. of ducted type; Features common to propellers and rotors for rotorcraft
    • B64C11/005Spiral-shaped propellers

Description

A. BRULLE.

PHOPELLER F'OR AIRCRAFT.

APPLICATION FlLED-NOV, as, 1920.

2 SHEETS-SHEET Patented Dec. 6, 1921.

as. lggg INVENTOR.

BY WORNEY.

A. BRULLE.

PROPELLE R FOR AIRCRAFT. APPLICATION FILED NOV. 16. 1920.

1,399,290, Patented Dc. 6,1921.

' 2 SHEETS-SHEET 2.

INVENTOR.

A TTORNE Y.

UNITED STATES ALEXANDER BRULLE, OF NEW YORK, N. Y.

PBOPELLER FOR AIRCRAFT.

Specification of Letters Patent.

Patented Dec. 6, 1921.

Application filed November 16, 1920. Serial No. 424,458.

To all whom it may concern:

Be it known that I, ALEXANDER BRULLE, a citizen of Hungary, residing at New York, in the county and State of New York, have invented certain new and useful Improvements in Propellers for Aircraft, of which the following is a full, clear, and exact specification.

This invention relates to propellers for aircraft and has for its object to provide an improved form of spiral or screw propeller for this purpose which will increase the speed of the aircraft equipped therewith.

Another object is to provide a propeller of this type composed of similar sections secured together at their edges to form the spiral blades, each section consisting of a hub section and oppositely extending blade sections, and corresponding generally to the usual form of two-blade propeller now used for driving aircraft. Each section of the spiral propeller is also bowed from the hub to the tips of its oppositely extending blades so as to give the spiral blades a dished formation adapted to densify the air in the spiral pockets between them which gives greater resistance against which the propeller may push and consequently produces greater speed.

The invention will be first hereinafter described in connection with the accompanying drawings, which constitute part of this specification, and then more specifically defined in the claims at the end of the description.

In the accompanying drawings, wherein similar reference characters are used to designate corresponding parts throughout the several views 2-- Figure 1 is a side elevation of a propeller of sectional construction made substantially ill accordance with this invention.

Fig. 2 is an end elevation thereof.

Fig. 3 is a section on the line III-III of Fig. 2 drawn to a larger scale.

Fig. 4 is a section on the line IVIV of Fig. 2 also drawn to the scale of Fig. 3.

Fig. 5 is a detailed view of two sections of the propeller looking at the end of the shaft and showing how said sections are assembled.

Fig. 6 is a side view of the same two sections of the propeller showing the bowed formation thereof, and

Fig. 7 is a side elevation of a modified form of propeller similar to that shown in F ig, l but made in one piece instead of in sections.

As illustrated in Figs. 1 to 6, inclusive, the spiral propeller 1 is preferably made of a plurality of sections 3 each having a hub section 7 and oppositely extending blade sections 6. The hub sections are mounted on a shaft 2, and the blade sections constitute portions of the continuous spiral blade of the whole propeller. Each section 3 as a whole is bowed, as best shown in Fig. 6, the opposite edges 4; and 5, and 8 and 9, respectively, of the oppositely extending blade sections of the same being parallel to each other and fitting along the adjacent edges of the next propeller sections in front and rear thereof along the shaft. Said abutting lateral edges of the propeller sections 3 are fastened together in any suitable and durable manner. The sections may be made of wood and their edges glued together.

The bowed formation of the propeller sections in operation caused the air to be caught in the pockets between the blades to some extent, and as additional air is being continually drawn faster than it is discharged the result is that said air is compressed or densified in its course through said spiral pockets until it is finally discharged. The blades of the propeller are thus provided with increased resistance against which they may push with the result that the speed of the aircraft equipped with the propeller will also be increased.

If desired, the propeller may be cast or otherwise formed in one piece as at 10 in Fig. 7,said propeller having the hub portion 11 extending throughout its length and from which the spiral blades 12 extend in the same bowed or dished formation as in the sectional form of propeller illustrated in the other figures of the drawings. In both forms, the blades are tapered from the hub to the outer edge of the propeller, as shown in Figs. 2, 3 and 4, so as to provide the necessary strength along with the bowed or dished formation which produces the superior results set forth. When the propeller is made of wood, the sectional construction greatly simplifies the production of the proper and true contour of the spiral blades.

Having thus described my invention, what I claim as new and desire to secure by Letters Patent of the United States is 1. A spiral screw propeller composed of a plurality of similar sections each'having, a hub section and oppositely extending blade sections, said sections being secured together edge to edge to form the continuous spiral screw, and each section being bowed axially of the propeller from the hub portion to the ends of its blade portions for the purpose specified.

2. A spiral screw propeller composed of a plurality of similar sections each having a hub section and oppositely extending blade sections, the lateral edges of the sections being parallel throughout both the hub and blade portions thereof and secured to the adjacent edges of other sections in front and rear of each section to form the con-V tinuous spiral screw, and said lateral edges of each section being curved aatiallyoi? the propeller to givea dish to the blades for the ALEXANDER BRULLE.

US42445820 1920-11-16 1920-11-16 Propeller for aircraft Expired - Lifetime US1399290A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
US42445820 US1399290A (en) 1920-11-16 1920-11-16 Propeller for aircraft

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US42445820 US1399290A (en) 1920-11-16 1920-11-16 Propeller for aircraft

Publications (1)

Publication Number Publication Date
US1399290A true US1399290A (en) 1921-12-06

Family

ID=23682700

Family Applications (1)

Application Number Title Priority Date Filing Date
US42445820 Expired - Lifetime US1399290A (en) 1920-11-16 1920-11-16 Propeller for aircraft

Country Status (1)

Country Link
US (1) US1399290A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3706511A (en) * 1971-04-06 1972-12-19 Atomic Energy Commission Laminated plastic propeller
US20170101989A1 (en) * 2014-03-12 2017-04-13 Eaton Corporation Methods for making a low inertia laminated rotor
US10208656B2 (en) 2012-11-20 2019-02-19 Eaton Intelligent Power Limited Composite supercharger rotors and methods of construction thereof

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3706511A (en) * 1971-04-06 1972-12-19 Atomic Energy Commission Laminated plastic propeller
US10208656B2 (en) 2012-11-20 2019-02-19 Eaton Intelligent Power Limited Composite supercharger rotors and methods of construction thereof
US20170101989A1 (en) * 2014-03-12 2017-04-13 Eaton Corporation Methods for making a low inertia laminated rotor

Similar Documents

Publication Publication Date Title
US2484141A (en) Skin stressed laminated fiberglas rotor blade
US1041913A (en) Aerial propeller.
GB1060421A (en) Rotor blade for a rotary wing aircraft
US2099229A (en) Fin equipped rudder
US3127093A (en) Ducted sustaining rotor for aircraft
US2041792A (en) Aircraft
US1861065A (en) Screw-propeller for flying machines and other aerodynamics apparatus
US2272439A (en) Aircraft sustaining rotor blade
US1066988A (en) Propeller.
US3044559A (en) Propeller
US1062258A (en) Propeller.
US2982361A (en) Variable camber blading
US2458919A (en) Baseball bat
US601494A (en) Spar for vessels
US2676017A (en) Composite arrowhead
US2938662A (en) Turbo compressor
US1684254A (en) Endless spiral conveyer
US2659444A (en) Molded aircraft sustaining rotor blade
US1597175A (en) Propeller
US2193397A (en) Arrow
GB513258A (en) Improvements in or relating to air screws
US2423796A (en) Hydroplane
US3040687A (en) Boat bottom
US1833019A (en) Airplane tire
US2473665A (en) Propeller