US1438094A - Propeller - Google Patents

Propeller Download PDF

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Publication number
US1438094A
US1438094A US246243A US24624318A US1438094A US 1438094 A US1438094 A US 1438094A US 246243 A US246243 A US 246243A US 24624318 A US24624318 A US 24624318A US 1438094 A US1438094 A US 1438094A
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United States
Prior art keywords
blades
hub
propeller
flukes
improved
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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
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US246243A
Inventor
Carpenter John
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Individual
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Individual
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Priority to US246243A priority Critical patent/US1438094A/en
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Publication of US1438094A publication Critical patent/US1438094A/en
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
    • B63H—MARINE PROPULSION OR STEERING
    • B63H1/00—Propulsive elements directly acting on water
    • B63H1/02—Propulsive elements directly acting on water of rotary type
    • B63H1/12—Propulsive elements directly acting on water of rotary type with rotation axis substantially in propulsive direction
    • B63H1/14—Propellers
    • B63H1/26—Blades
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
    • B63H—MARINE PROPULSION OR STEERING
    • B63H1/00—Propulsive elements directly acting on water
    • B63H1/02—Propulsive elements directly acting on water of rotary type
    • B63H1/12—Propulsive elements directly acting on water of rotary type with rotation axis substantially in propulsive direction
    • B63H1/14—Propellers
    • B63H1/20—Hubs; Blade connections
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B64—AIRCRAFT; AVIATION; COSMONAUTICS
    • B64C—AEROPLANES; HELICOPTERS
    • B64C11/00—Propellers, e.g. of ducted type; Features common to propellers and rotors for rotorcraft
    • B64C11/005—Spiral-shaped propellers

Definitions

  • PROPEL LER PROPEL LER
  • This invention relates to screw propellers and it has for its object to produce a propeller of simple and improved construction, the blades or flukes of which have bearing faces of great area, whereby the operation of the device will be rendered particularly effective.
  • a further object of the invention is to produce a screw propeller, the blades or flukes of which are spirally disposed with respect to the hub or axis of rotation, said blades or flukes extending at each end uninterruptedly beyond the corresponding end of the hub, thereby increasing the effective operating area of the blades.
  • Figure 1 is a side view of a propeller constructed in accordance with the invention.
  • Figure 2 is an end view of the same.
  • Figure 3 is a transverse sectional view taken on the line 33 in Figure 1.
  • the improved propeller includes a longrtudinal central portion 15 which constitutes a hub, said central portion having a bore 16 formed longitudinally thereon, and trans-.
  • blades or flukes 20 which are spirally disposed, each of said blades making a half s iral convolution with respect to the hub.
  • ach of the blades or flukes is of a length materially exceeding, the length of the hub, said blades having rounded end portions 21 which extend uninterruptedly beyond the ends of the hub, thereby materially increasing the effective area'of the blades.
  • the same is preferably formed of single casting, and that the diameter of the hub does not exceed the thickness of the blades or flukes at the juncture of said blades or flukes with the hubs, the blades or flukes being tapered from the hub and outwardly to a thickness which will not exceed that which is necessary to produce the requisite strength.
  • the result of this'construction will be that the spiral grooves or convolutions formed by the respective blades or flukes will be smooth and uninterrupted throughout and free from any projections that would be liable to form any resistance to the operation of the device.
  • a propeller comprising an elongated hub portion, and a pair of spiral blades projecting from-opposite sides thereof and correspondingly arranged, the ends of the blades projecting materially beyond the ends of the hub portion with all the extremities of the bladesbeing-semi-circular in shape.

Description

J. CARPENTER.
PROPEL LER.
APPLICATION FILED JULY 22,1918.
Patented Dec. 5,1922.
awwwto'p John Cizrpenizg Patented Dec. 5, 1922.
PROPELLER.
Application filed July 22,
To all whom it may concern.
Be it known that I, J'oHN CARPENTER, a citizen of New Zealand, residing at North Auckland, New Zealand, have invented new and useful Improvements in Propellers, of
which the following is a specification.
This invention relates to screw propellers and it has for its object to produce a propeller of simple and improved construction, the blades or flukes of which have bearing faces of great area, whereby the operation of the device will be rendered particularly effective.
A further object of the invention is to produce a screw propeller, the blades or flukes of which are spirally disposed with respect to the hub or axis of rotation, said blades or flukes extending at each end uninterruptedly beyond the corresponding end of the hub, thereby increasing the effective operating area of the blades. 1
With these and other ends in view which will readily appear as the nature-of the invention is better understood, the same consists in the improved construction and novel arrangement and combination of parts which will be hereiaf ter fully described and particularly pointedout in the claim.
In the accompanying drawing has been illustrated a simple and preferred form of the invention, it being, however, understood that no limitationis necessarily made to the precise structural details therein exhibited, but that changes, alterations and modifications within the scope of the claim may be resorted to when desired.
In the drawing, v
Figure 1 is a side view of a propeller constructed in accordance with the invention.
Figure 2 is an end view of the same. Figure 3 is a transverse sectional view taken on the line 33 in Figure 1.
Corresponding parts in the several figures are denoted by like characters of reference. The improved propeller includes a longrtudinal central portion 15 which constitutes a hub, said central portion having a bore 16 formed longitudinally thereon, and trans-.
verse threaded openings 17 being also pro- 1918. Serial m.- 246,243.-
vided for the reception of fastening members, such as screws 18, whereby the device -may be securely mounted on a revoluble shaft 19.
Formed on opposite sides of the hub 15 are blades or flukes 20 which are spirally disposed, each of said blades making a half s iral convolution with respect to the hub.
ach of the blades or flukes is of a length materially exceeding, the length of the hub, said blades having rounded end portions 21 which extend uninterruptedly beyond the ends of the hub, thereby materially increasing the effective area'of the blades.
In the construction of the improved propeller it will be noted that the same is preferably formed of single casting, and that the diameter of the hub does not exceed the thickness of the blades or flukes at the juncture of said blades or flukes with the hubs, the blades or flukes being tapered from the hub and outwardly to a thickness which will not exceed that which is necessary to produce the requisite strength. The result of this'construction will be that the spiral grooves or convolutions formed by the respective blades or flukes will be smooth and uninterrupted throughout and free from any projections that would be liable to form any resistance to the operation of the device.
From the foregoing description taken in connection with the drawing it will be readily understood that the improved propeller may be readily applied to the propulsion of any fioating craft, and that the operation thereof will be equally effective without regard to the direction of rotation.
What is claimed is A propeller comprising an elongated hub portion, and a pair of spiral blades projecting from-opposite sides thereof and correspondingly arranged, the ends of the blades projecting materially beyond the ends of the hub portion with all the extremities of the bladesbeing-semi-circular in shape.
In testimony whereof I afiix my signature. I
JOHN CARPENTER.
US246243A 1918-07-22 1918-07-22 Propeller Expired - Lifetime US1438094A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
US246243A US1438094A (en) 1918-07-22 1918-07-22 Propeller

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US246243A US1438094A (en) 1918-07-22 1918-07-22 Propeller

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US1438094A true US1438094A (en) 1922-12-05

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US246243A Expired - Lifetime US1438094A (en) 1918-07-22 1918-07-22 Propeller

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3179182A (en) * 1962-06-14 1965-04-20 Imre Papai Screw propeller

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3179182A (en) * 1962-06-14 1965-04-20 Imre Papai Screw propeller

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